CN114813502A - A multi-ring segment lining leakage test device and method thereof - Google Patents

Abstract

The invention discloses a multi-ring segment lining water leakage test device and a method thereof, comprising a water pressure system; a lining model and a sealing system; the sealing system comprises a sealing steel shell, the lining model is located in the sealing steel shell, and the sealing system is sealed A pressurized sealed cavity is formed between the steel shell and the lining model, and the side of the sealed steel shell is provided with a water injection hole, a test water pressure port and a pressurized exhaust valve. The steps of the test method of the present invention are as follows: (1) assembling of equipment; (2) simulation test: a, test without load; b, test under load. The water pressure system of the present invention injects water into the pressurized airtight cavity through the water injection hole and pressurizes it, so as to apply external water pressure to the lining model. In this way, the leakage mechanism of the segment is accurately revealed, which makes the simulation test of the whole device more realistic, and effectively improves the test effect and efficiency of the test device.

Description

A multi-ring segment lining leakage test device and method thereof

technical field

The invention belongs to the technical field of segment testing, and in particular relates to a multi-ring segment lining water leakage test device and a method thereof.

Background technique

The shield tunnel lining is a multi-joint structure formed by connecting segments by joints. Due to the dimensional accuracy and assembly quality of segments and elastic gaskets, the opening of the joints under different loads and deformations, and the size of the staggered platform, the joints lead to Water leakage has become one of the most common diseases of shield tunnel facilities. Seepage prevention and plugging, as the most important task in the maintenance of shield tunnel facilities, greatly increases the cost of facility operation and maintenance. Therefore, the waterproofing of segment joints is very important for shield tunnels. However, due to the complex causes of water leakage, the mechanism of water leakage in joints is still unclear, and the problem of water leakage in shield tunnel linings has not been solved so far. It is of great significance for the prevention and treatment of water leakage to conduct experimental research on water leakage of segment lining joints.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a technical scheme of a multi-ring segment lining water leakage test device and a method thereof in view of the deficiencies in the prior art. The design is ingenious, the structure is simple and reasonable, and the practicability is strong. The hole is pressurized with water in the pressurized closed cavity, thereby applying external water pressure to the lining model. The test device can more realistically simulate the environment where the groundwater of the shield tunnel acts on the lining of the segment, so as to accurately reveal the water leakage mechanism of the segment. , which makes the simulation test of the whole device more realistic, and effectively improves the test effect and efficiency of the test device; during the test of the present invention, it can simulate different deformations during the construction period and the operation period at the same time, and study the segment under different construction quality and lining deformation. The external water immersion and seepage path reveal the leakage mechanism of segment lining joints (longitudinal joints and circumferential joints), which is used to solve the problem that the existing segment leakage simulation test does not match the actual engineering situation.

In order to solve the above-mentioned technical problems, the present invention adopts the following technical solutions:

A multi-ring segment lining water leakage test device, including a water pressure system; characterized in that: it also includes a lining model and a sealing system, the sealing system includes a sealing steel shell, the lining model is located in the sealing steel shell, and the sealing steel shell is connected with the sealing steel shell. A pressurized airtight cavity is formed between the lining models. The side of the sealed steel shell is provided with a water injection hole, a test water pressure port and a pressurized exhaust valve. The water injection hole and the test water pressure port are connected with the pressurized airtight cavity. The system acts on the pressurized airtight cavity through the water injection hole; the design is ingenious and reasonable, and the test water pressure port can be used to detect the water pressure of the pressurized airtight cavity, which is more conducive to the actual test test and improves the test efficiency; The exhaust valve is a two-way valve, one channel is used for air exhaust, and the other channel is used for water injection and pressure. The water is injected into the pressurized airtight cavity, and the pressurized exhaust valve is opened when the water is injected. The water pressure system injects water into the pressurized airtight cavity through the water injection hole. The air valve is closed, and the water pressure is applied through the pressurized exhaust valve, and the water leakage of the lining model is observed, and the waterproof ability of the lining model is checked.

Further, the sealing steel shell includes two semi-circular steel shells that are symmetrically spliced. Both sides of the semi-circular steel shell are provided with side sealing plates, and side bolt holes are provided on the side sealing plates. The two side sealing plates are connected and fixed by fixing bolts, and the fixing bolts pass through the side bolt holes to connect and fix the corresponding two side sealing plates. During assembly, the two semi-circular steel shells are connected by the side sealing plates, and the connection and fixing between the corresponding two side sealing plates are realized by the cooperation of the side bolt holes and the fixing bolts, which effectively ensures the stable structure of the sealed steel shells after assembly. It is easy to disassemble and assemble, and easy to operate.

Further, the top and bottom surfaces of the semi-circular steel shell are provided with end sealing plates, the end sealing plates are provided with end bolt holes, the top and bottom surfaces of the lining model are provided with connecting holes, and the end bolt holes and the connecting holes are one by one. Correspondingly, the semi-circular steel shell is connected and fixed with the lining model through connecting bolts, and the connecting bolts are connected through the end bolt holes in the corresponding connecting holes to connect and fix the end sealing plate and the lining model, and the upper and lower end sealing plates are connected to the corresponding A cavity is formed between the semi-circular steel shells, which is used for the placement of the lining model, and a pressurized closed cavity is formed between the lining model and the sealing steel shell, and the end sealing plate can be used for the end bolt holes. Setting, through the cooperation of the end bolt holes, the connecting holes and the connecting bolts, the connection and fixation between the lining model and the end sealing plate is realized, which effectively ensures the firmness and reliability of the connection between the lining model and the sealing steel shell. The design is ingenious and reasonable. Easy to install and remove.

Further, the semi-circular steel shell, the side sealing plate and the end sealing plate are integrally formed. The design of the integrally formed structure can ensure the overall structural strength, and at the same time, it can facilitate the actual processing and forming, and the integrally formed structure can reduce the connection and handover. The sealing performance of the pressurized airtight cavity formed between the sealed steel shell and the lining model is better, thereby improving the accuracy of the actual test measurement data.

Further, the lining model is formed by splicing pipe rings, the pipe rings are formed by splicing pipe pieces, rubber gaskets are arranged between adjacent pipe pieces, the pipe pieces are connected by bolts to form pipe rings, and the pipe rings are superimposed up and down. The lining model is formed by fixing with bolts, and the assembly and splicing are convenient and simple, and a rubber gasket is set between the adjacent segments to ensure the assembly quality of the lining model.

Further, the sealing system also includes a water-stop sealing gasket, the water-stop sealing gasket includes an upper sealing ring, a lower sealing ring and a sealing strip, the sealing strip is connected between the upper sealing ring and the lower sealing ring, and the upper sealing ring is located in the upper sealing ring. At the contact point between the top surface of the lining model and the end sealing plate, the lower sealing ring is located at the contact point between the bottom surface of the lining model and the end sealing plate. The lower sealing ring seals and tightens the contact between the lining model and the end sealing plate, and seals and tightens the connection between the two semi-circular steel shells through the sealing strip, so that the sealing steel shell and the lining model are sealed and tightened. The sealing performance of the pressurized airtight cavity formed between them is better, thereby improving the actual test accuracy.

Further, grooves are provided on both the end sealing plate and the side sealing plate, the groove on the end sealing plate is used for the embedded installation of the upper sealing ring or the lower sealing ring, and the groove on the side sealing plate is used for sealing. The embedded installation of the strip is ingenious and reasonable in design. By setting grooves on the end sealing plate and the side sealing plate, the grooves are used for the installation and positioning of the water-proof gasket, which makes the actual assembly more convenient and simple, and ensures the water-proof sealing. The precise positioning of the gasket ensures the sealing effect of the water-stop gasket.

Further, the upper sealing ring, the lower sealing ring and the sealing strip are integrally formed.

Based on the above-mentioned test method of a multi-ring segment lining water leakage test device, the method includes the following steps:

(1) Assembly of the equipment:

a. The lining model is assembled according to the lining of the tunnel, and the pipe segments are assembled to form a pipe ring. The segments are assembled with bolts, and rubber gaskets are set between adjacent segments, and then several assembled pipes are assembled. The rings are assembled and connected by bolts to form a lining model, and bolt holes are preset at the top and bottom ends of the lining model according to the design requirements; pipe rings are assembled between segments and segments, and then several pipe rings are assembled by bolts to form The lining model is easy to assemble and assemble, and a rubber gasket is set between the adjacent segments to effectively ensure the assembly quality of the lining model;

b. Install the water-stop gasket on the lining model, so that the reserved holes on the upper sealing ring and the lower sealing ring correspond to the preset bolt holes at both ends of the lining model, and then assemble the outer sealing steel shell, and place the semicircle The end bolt holes at both ends of the shaped steel shell correspond to the bolt holes reserved on the lining model, and the semi-circular steel shell and the lining model are fixed by connecting bolts. At the same time, the upper sealing ring and the lower sealing ring are just embedded in the corresponding end seal In the groove of the plate, the sealing strip is just embedded in the groove of the side sealing plate, and the two semicircular steel shells pass through the side bolt holes reserved on the side sealing plate. The steel shells are connected and assembled to form a pressurized airtight cavity; the sealed steel shell is designed into two semi-circular steel shells, which are ingeniously designed, easy to assemble and easy to operate, and the semi-circular steel shell and the lining model pass through The reserved end bolt holes and bolt holes can achieve accurate positioning, and then cooperate with connecting bolts to connect and fix the two, while the two semi-circular steel shells are connected and fixed by reserved side bolt holes and fixed bolts, ensuring that The connection is firm and reliable, and there is also a water-stop gasket between the sealing steel shell and the lining model. The upper sealing ring and the lower sealing ring cover the contact end between the lining model and the sealing steel shell, and the sealing strip covers it. At the connection of the two semi-circular steel shells, the sealing performance of the pressurized airtight cavity formed between the sealing steel shell and the lining model is better, and the water-stop gasket is an integral structure, which can effectively ensure the actual sealing effect, improve the actual test accuracy;

c. Connect the water pressure system with the water injection hole and the pressurized exhaust valve, and then install a load loading device that simulates different deformations of the lining model at the inner hollow position of the lining model;

(2) Simulation test:

a. No load test:

①Open the pressurized exhaust valve, the water pressure system injects water into the pressurized airtight cavity through the water injection hole, until the pressurized airtight cavity is filled with water, close the pressurized air exhaust valve, and then exhaust through the pressurized air. The valve continues to inject water into the pressurized airtight cavity, observe the water leakage of the lining model, and check the waterproof performance of the lining model. After the test, the water in the pressurized airtight cavity is discharged through the water injection hole;

②Adjust the bolts on the segments of the lining model, adjust the staggering or opening of the segments of the lining model to simulate different states of segment assembly, and repeat the above step ① to test the waterproof capability of the lining model under pressure. ;

③ Repeat the above step ② at least twice;

The test is carried out under the condition of no load, and by adjusting the bolts of the segment on the lining model, the staggering or opening of the segment of the lining model is adjusted to achieve multiple tests, so that the test can simulate the different segments of the shield tunnel. The amount of opening and dislocation, combined with the impermeability of the shield lining of the water pressure system model under different working conditions, can effectively improve the accuracy and reliability of the test data, and improve the actual scientific research efficiency, and the test can be used at the same time. Simultaneous testing of longitudinal joints and circumferential joints of shield tunnel linings to achieve impermeability tests in both horizontal and vertical dimensions of shield tunnel linings, effectively improving test efficiency;

b. Test under load:

① The load loading device is started, and a pushing load is applied to the inner side of the lining model to cause structural deformation to simulate the tunnel deformation under the action of construction load and soil and water pressure, and then open the pressurized exhaust valve, and the water pressure system passes through the water injection hole. Carry out the water injection operation in the pressurized airtight cavity until the pressurized airtight cavity is filled with water, close the pressurized exhaust valve, and then continue to inject water and pressurize the pressurized airtight cavity through the pressurized air exhaust valve, and observe the lining The water leakage of the model is checked, and the waterproof performance of the lining model is checked. After the experiment, the water in the pressurized airtight cavity is discharged through the water injection hole;

②Adjust the load value applied by the load loading device to the lining model, and repeat the above step ① to test the waterproof ability under pressure, and check the waterproof performance of the lining model under different load deformations;

③ Repeat the above step ② at least twice;

④Adjust the bolts on the segments of the lining model, and adjust the staggering or opening of the segments of the lining model to simulate different states of segment assembly, and then repeat the process from step ① to step ② above to carry out the lining model in this state. Pressure test waterproof ability;

⑤ Repeat the above step ④ at least twice.

The test test is carried out under load, so that the leakage of the deformed pipe ring occurs under the internal load of the model, and the internal load value is adjusted to measure the waterproof performance of the lining model under different internal loads, and under the load By adjusting the bolts of the segment on the lining model, the dislocation or opening of the segment of the lining model is adjusted to simulate the impermeability of the shield tunnel lining under the same opening or dislocation and different internal loads.

The present invention has the following beneficial effects due to the adoption of the above-mentioned technical solutions:

The invention has ingenious design, simple and reasonable structure, and strong practicability. The water pressure system injects water into the pressurized airtight cavity through the water injection hole to pressurize water, thereby applying external water pressure to the lining model, and the test device can simulate the shield more realistically. The groundwater in the tunnel acts on the lining of the segment, thereby accurately revealing the water leakage mechanism of the segment, making the simulation test of the entire device more realistic, and effectively improving the test effect and efficiency of the test device. The sealing steel shell in the present invention is split into two semi-circular steel shells, which is convenient for actual assembly and splicing, and is convenient for operation. Moreover, a water-stop sealing gasket with an integrally formed structure is adopted to ensure the actual sealing effect and improve the performance of the simulation test. accuracy and improve scientific research efficiency.

The invention can simultaneously simulate different deformations in the construction period and the operation period, study the water immersion and seepage path of the outer side of the segment under different construction quality and lining deformation, and reveal the leakage mechanism of the segment lining joints (longitudinal joints and circumferential joints). , which is used to solve the problem that the existing simulation test of leakage water of the segment does not match the actual engineering situation. Compared with the test device in the prior art, the device of the present invention is simple, and the test simulation is more realistic. During the test of the present invention, after the components are assembled, the pressurized exhaust valve is opened, and the water pressure system injects water into the pressurized airtight cavity through the water injection hole. Close the air valve, apply water pressure through the pressurized exhaust valve, observe the water leakage of the lining model, check the waterproof ability of the lining model, and adjust the bolts on the segment to change the misalignment or opening of the segment, and then pressurize Test the waterproof ability, simulate and test the impermeability of the lining model under different working conditions, and also apply an internal load to the lining model, and re-test the waterproof ability of the lining model under the condition of internal load. The simulation test under the parameters provides a quantitative reference for the refinement design of the joint impermeability of the tunnel project. In addition, the present invention adopts multi-ring segment for research, which can study the water leakage between the tube rings and the segment and the segment together, thereby effectively improving the efficiency of scientific research.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings:

Fig. 1 is the structural representation after the lining model and the sealing steel shell are assembled in the present invention;

Fig. 2 is the structural representation of the lining model in the present invention;

3 is a schematic diagram of the installation structure of the water-stop gasket in the sealed steel shell according to the present invention;

Fig. 4 is the structural representation of the semicircular steel shell in the present invention;

Fig. 5 is the structural representation of the water-stop sealing gasket in the present invention;

Fig. 6 is the vertical sectional structure schematic diagram of Fig. 1;

FIG. 7 is a schematic cross-sectional structure diagram of FIG. 1 .

In the picture: 1- Lining model; 2- Groove; 3- Sealed steel shell; 4- Pressurized airtight cavity; 5- Water injection hole; 6- Test water pressure port; 7- Pressurized exhaust valve; 8- Half Round steel shell; 9-side sealing plate; 10-side bolt hole; 11-end sealing plate; 12-end bolt hole; 13-connecting hole; 14-pipe ring; 15-pipe; 16-waterproof gasket ; 17-upper sealing ring; 18-lower sealing ring; 19-seal.

Detailed ways

As shown in Figures 1 to 7, it is a multi-ring segment lining water leakage test device of the present invention, including a water pressure system; also a lining model 1 and a sealing system, the sealing system includes a sealing steel shell 3, and the lining model 1 is located in the sealed steel shell 3, a pressurized airtight cavity 4 is formed between the sealed steel shell 3 and the lining model 1, and the side of the sealed steel shell 3 is provided with a water injection hole 5, a test water pressure port 6 and a pressurized exhaust valve 7 , the water injection hole 5 and the test water pressure port 6 are connected with the pressurized airtight cavity 4, and the water pressure system acts on the pressurized airtight cavity 4 through the water injection hole 5; the design is ingenious and reasonable, and the test water pressure port 6 can be used for detection The water pressure of the pressurized airtight cavity 4 is more conducive to the actual test test and improves the test efficiency; the pressurized exhaust valve 7 is a two-way valve, one channel is used for air discharge, and the other channel is used for water injection and pressurization. The design of the pressurized exhaust valve 7 can ensure that the gas in the pressurized airtight cavity 4 is discharged, so that the water pressure system can inject water into the pressurized airtight cavity 4, and the pressurized air exhaust valve 7 is opened during water injection. The water filling pressure system injects water into the pressurized airtight cavity 4 through the water injection hole 5. After the pressurized airtight cavity 4 is filled with water, the pressurized exhaust valve 7 is closed, and then water is injected through the pressurized exhaust valve 7 to apply water. Press, observe the water leakage of the lining model 1, and check the waterproof ability of the lining model 1.

The sealed steel shell 3 includes two semicircular steel shells 8 that are symmetrically spliced. Both sides of the semicircular steel shell 8 are provided with side sealing plates 9. The side sealing plates 9 are provided with side bolt holes 10. The steel shells 8 are connected and fixed by fixing bolts. The fixing bolts pass through the side bolt holes 10 to connect and fix the corresponding two side sealing plates 9. The sealing steel shell 3 is designed into two semi-circular steel shells 8, which is convenient for The assembly between the sealing steel shell 3 and the lining model 1, the two semi-circular steel shells 8 are connected by the side sealing plate 9, and the matching between the two side sealing plates 9 is realized by the cooperation of the side bolt holes 10 and the fixing bolts. The connection and fixation between the sealed steel shell 3 effectively ensure the structural stability and structural strength of the sealed steel shell 3 after assembly, and the disassembly and assembly are convenient and simple, and the operation is convenient.

The top and bottom surfaces of the semicircular steel shell 8 are provided with end sealing plates 11 , the end sealing plates 11 are provided with end bolt holes 12 , the top and bottom surfaces of the lining model 1 are provided with connecting holes 13 and end bolt holes 12 Corresponding to the connecting holes 13 one-to-one, the semicircular steel shell 8 is connected and fixed with the lining model 1 through connecting bolts, and the connecting bolts pass through the end bolt holes 12 and are connected in the corresponding connecting holes 13 to connect the end sealing plate 11 and the lining model 1. A cavity is formed between the upper and lower end sealing plates 11 and the corresponding semi-circular steel shell 8, the cavity is used for the placement of the lining model 1, and at the same time, the lining model 1 and the sealing steel shell 3 are formed Pressurize the airtight cavity 4, and the end sealing plate 11 can be used for the setting of the end bolt holes 12. Through the cooperation of the end bolt holes 12, the connecting holes 13 and the connecting bolts, the connection between the lining model 1 and the end sealing plate 11 is realized. Fixed, effectively ensuring the firmness and reliability of the connection between the lining model 1 and the sealing steel shell 3, the design is ingenious and reasonable, and the installation and disassembly are convenient and simple.

The semi-circular steel shell 8, the side sealing plate 9 and the end sealing plate 11 are integrally formed. The design of the integrally formed structure can ensure the overall structural strength, and at the same time, it can facilitate the actual processing and forming, and the integrally formed structure can reduce the connection and crossover. The seam makes the sealing performance of the pressurized airtight cavity 4 formed between the sealing steel shell 3 and the lining model 1 better, thereby improving the accuracy of the actual test measurement data.

The lining model 1 is formed by splicing pipe rings 14, and the pipe rings 14 are formed by splicing pipe pieces 15. A rubber gasket is arranged between adjacent pieces 15, and the pipe pieces 15 are connected by bolts to form the pipe ring 14. The lining model 1 is formed by superimposing up and down with bolts between 14, which is convenient and simple to assemble and splicing, and a rubber gasket is set between the adjacent segments 15 to ensure the assembly quality of the lining model 1.

The sealing system also includes a water-stop gasket 16, the water-stop gasket 16 includes an upper sealing ring 17, a lower sealing ring 18 and a sealing strip 19, and the sealing strip 19 is connected between the upper sealing ring 17 and the lower sealing ring 18 , the upper sealing ring 17 is located at the contact between the top surface of the lining model 1 and the end sealing plate 11, and the lower sealing ring 18 is located at the contact between the bottom surface of the lining model 1 and the end sealing plate 11, corresponding to the connection between the two side sealing plates 9 A sealing strip 19 is arranged between the two parts, and the contact between the lining model 1 and the end sealing plate 11 is sealed and fastened by the upper sealing ring 17 and the lower sealing ring 18. The joints between the shells 8 are sealed and tightened, so that the sealing performance of the pressurized airtight cavity 4 formed between the sealed steel shell 3 and the lining model 1 is better, thereby improving the actual test accuracy.

The end sealing plate 11 and the side sealing plate 9 are both provided with grooves 2, and the groove 2 on the end sealing plate 11 is used for the embedded installation of the upper sealing ring 17 or the lower sealing ring 18, and is located on the side sealing plate 9. The groove 2 is used for the embedded installation of the sealing strip 19, and the design is ingenious and reasonable. By setting the groove 2 on the end sealing plate 11 and the side sealing plate 9, the groove 2 is used for the installation and positioning of the water-stop gasket 16, so that the The actual assembly is more convenient and simple, which ensures the accurate positioning of the water-stop sealing gasket 16 and the sealing effect of the water-stop sealing gasket 16 .

The upper sealing ring 17, the lower sealing ring 18 and the sealing strip 19 are integrally formed. Effect.

Based on the above-mentioned test method of a multi-ring segment lining water leakage test device, the method includes the following steps:

(1) Assembly of the equipment:

a. Assemble the lining model 1 according to the tunnel lining, and use the segment 15 to assemble the pipe ring 14. The segment 15 and the segment 15 are assembled by bolts, and a rubber gasket is arranged between the adjacent segments 15, and then The assembled pipe rings 14 are assembled and connected by bolts to form a lining model 1, and bolt holes are preset at the top and bottom ends of the lining model 1 according to the design requirements; ring 14, and then several pipe rings 14 are assembled by bolts to form the lining model 1, which is convenient and simple to assemble and assemble, and a rubber gasket is arranged between the adjacent segments 15, which effectively ensures the assembly quality of the lining model 1;

b. Install the water-stop gasket 16 on the lining model 1, so that the reserved holes on the upper sealing ring 17 and the lower sealing ring 18 correspond to the preset bolt holes at both ends of the lining model 1, and then assemble the external sealing steel Shell 3, the end bolt holes 12 at both ends of the semi-circular steel shell 8 correspond to the bolt holes reserved on the lining model 1, and the semi-circular steel shell 8 and the lining model 1 are fixed by connecting bolts, and the sealing ring is placed at the same time. 17. The lower sealing ring 18 is just embedded in the groove 2 of the corresponding end sealing plate 11, the sealing strip 19 is just embedded in the groove 2 on the side sealing plate 9, and the space between the two semicircular steel shells 8 is Through the side bolt holes 10 reserved on the side sealing plate 9, the two semicircular steel shells 8 are connected and assembled with fixing bolts to form a pressurized airtight cavity 4; the sealing steel shell 3 is designed into two semicircular shapes The steel shell 8 is ingenious in design, easy to assemble and easy to operate. The semi-circular steel shell 8 and the lining model 1 are precisely positioned through the reserved end bolt holes 12 and bolt holes, and then the connecting bolts are used to connect the two. The connection is fixed, and the two semi-circular steel shells 8 are connected and fixed through the reserved side bolt holes 10 with the fixing bolts, which ensures the firmness and reliability of the connection. There is a water-stop gasket 16, the upper sealing ring 17 and the lower sealing ring 18 are shielded at the contact end of the lining model 1 and the sealing steel shell 3, and the sealing strip 19 is shielded at the connection of the two semicircular steel shells 8. , so that the sealing performance of the pressurized airtight cavity 4 formed between the sealing steel shell 3 and the lining model 1 is better, and the water-stop gasket 16 is an integral structure, which can effectively ensure the actual sealing effect and improve the actual test accuracy. Spend;

c. Connect the water pressure system with the water injection hole 5 and the pressurized exhaust valve 7, and then install a load loading device that simulates different deformations of the lining model at the inner hollow position of the lining model 1;

(2) Simulation test:

a. No load test:

①Open the pressurized exhaust valve 7, and the water pressure system injects water into the pressurized airtight cavity 4 through the water injection hole 5 until the pressurized airtight cavity 4 is filled with water, close the pressurized air exhaust valve 7, and then Continue to inject water and pressurize the pressurized airtight cavity 4 through the pressurized exhaust valve 7, observe the water leakage of the lining model 1, and check the waterproof performance of the lining model 1. 4 The water in it is drained;

②Adjust the bolts on the segment 15 of the lining model 1, adjust the staggering or opening of the segment 15 of the lining model 1 to simulate different states of the segment 15 being assembled, and then repeat the above step ① for the lining model in this state 1. Conduct pressure test to test the waterproof ability;

③ Repeat the above step ② at least twice;

The test is carried out under no load, and by adjusting the bolts of the segment 15 on the lining model 1, the staggering or opening of the segment 15 of the lining model 1 is adjusted to achieve multiple tests, so that the test can simulate shield tunneling. The different opening and dislocation amounts of the 15 tunnel segments, combined with the impermeability of the shield lining of the water pressure system model under different working conditions, can effectively improve the accuracy and reliability of the test data, improve the actual scientific research efficiency, and This test can simultaneously test the longitudinal joints and circumferential joints of the shield tunnel lining, realize the impermeability test of the shield tunnel lining in the horizontal and vertical dimensions, and effectively improve the test efficiency;

b. Test under load:

① The load loading device is started, and a pushing load is applied to the inner side of the lining model 1 to cause structural deformation to simulate the tunnel deformation under the action of construction load and soil and water pressure, and then open the pressure exhaust valve 7, and the water pressure system injects water through the The hole 5 carries out the water injection operation into the pressurized airtight cavity 4 until the pressurized airtight cavity 4 is filled with water, closes the pressurized exhaust valve 7, and then through the pressurized air exhaust valve 7 injects water into the pressurized airtight cavity 4. Continue to inject water and pressurize, observe the water leakage of the lining model 1, check the waterproof performance of the lining model 1, and discharge the water in the pressurized airtight cavity 4 through the water injection hole 5 after the experiment;

②Adjust the load value applied by the load loading device to the lining model 1, and then repeat the above steps ① to test the waterproof ability under pressure, and check the waterproof performance of the lining model 1 under different load deformations;

③ Repeat the above step ② at least twice;

④Adjust the bolts on the segment 15 of the lining model 1, and adjust the staggered or open amount of the segment 15 of the lining model 1 to simulate different states of the segment 15 being assembled, and then repeat the above steps ① to ②. The lining model 1 in the state is pressurized to test the waterproof ability;

⑤ Repeat the above step ④ at least twice.

The test test is carried out under load, so that the leakage of the deformed pipe ring 14 occurs under the internal load of the model, and the internal load value is adjusted to measure the waterproof performance of the lining model 1 under different internal loads, and Under the load, by adjusting the bolts of the segment 15 on the lining model 1, the staggering or opening of the segment 15 of the lining model 1 is adjusted to simulate the resistance of the shield tunnel lining under the same opening or dislocation and different internal loads. penetration performance.

The invention can simultaneously simulate different deformations in the construction period and the operation period, study the water immersion and seepage path of the outer side of the segment 15 under different construction quality and lining deformation, and reveal the leakage of the lining joints (longitudinal joints and circumferential joints) of the segment 15 The water mechanism is used to solve the problem that the simulation test of leakage water of the existing segment 15 does not match the actual engineering situation. Compared with the test device in the prior art, the device of the present invention is simple, and the test simulation is more realistic. During the test of the present invention, after each component is assembled, the pressurized exhaust valve 7 is opened, and the water pressure system injects water into the pressurized airtight cavity 4 through the water injection hole 5, and after the pressurized airtight cavity 4 is filled with water, Close the pressurized exhaust valve 7, then inject water through the pressurized exhaust valve 7 to apply water pressure, observe the water leakage of the lining model 1, check the waterproof ability of the lining model 1, and adjust the bolts on the segment 15 to change the The 15 segments are staggered or opened, and then pressurized to test the waterproof ability, simulate and test the impermeability of the lining model 1 under different working conditions, and can also apply internal loads to the lining model 1. Under the condition of internal load, the lining The waterproof ability of the model 1 is re-tested, and the present invention provides quantitative reference for the fine design of the anti-seepage of the tunnel engineering joint through the simulation test under various parameters. Moreover, the present invention adopts multi-ring segment 15 for research, which can study the leakage water between the tube ring 14 and the tube ring 14 and between the segment 15 and the segment 15 together, thereby effectively improving the efficiency of scientific research.

In the present invention, by changing the shape of the sealing steel shell 3 and the water-stop sealing gasket 16, it can be used for the water leakage test of structures with different shapes such as circle and square. In addition, by changing the fixing method of the end sealing plate 11 in the present invention, it can be used for the water leakage test of other structures with different materials such as concrete.

The above are only specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent replacements, or modifications made based on the present invention to achieve substantially the same technical effect are all included in the protection scope of the present invention.

Claims (10)

1. A multi-ring segment lining water leakage test device comprises a water adding pressure system; the method is characterized in that: still include lining cutting model and sealing system, sealing system is including sealed box hat, the lining cutting model is located in the sealed box hat, sealed box hat with form the airtight cavity of pressurization between the lining cutting model, the side of sealed box hat is provided with the water injection hole, the water injection hole with the airtight cavity of pressurization is linked together, the water filling pressure system passes through the water injection hole acts on the airtight cavity of pressurization.

2. The multi-ring segment lining water leakage test device of claim 1, which is characterized in that: and a test water pressure port and a pressurizing exhaust valve are arranged on the side surface of the sealed steel shell.

3. The multi-ring segment lining water leakage test device of claim 1, which is characterized in that: the sealing steel shell comprises two symmetrically spliced semi-circular steel shells, side sealing plates are arranged on two sides of each semi-circular steel shell, side bolt holes are formed in the side sealing plates, the two semi-circular steel shells are fixedly connected through fixing bolts, and the fixing bolts penetrate through the side bolt holes to correspond to the two side sealing plates and are fixedly connected.

4. The multi-ring segment lining water leakage test device according to claim 3, characterized in that: the top surface and the bottom surface of the semicircular steel shell are both provided with end sealing plates, end bolt holes are formed in the end sealing plates, connecting holes are formed in the top surface and the bottom surface of the lining model, the end bolt holes correspond to the connecting holes in a one-to-one mode, the semicircular steel shell is fixedly connected with the lining model through connecting bolts, and the connecting bolts penetrate through the end bolt holes to be connected in the corresponding connecting holes to fix the end sealing plates and the lining model.

5. The multi-ring segment lining water leakage test device according to claim 4, characterized in that: the semicircular steel shell, the side sealing plate and the end sealing plate are of an integrally formed structure.

6. The multi-ring segment lining water leakage test device of claim 1, which is characterized in that: the lining model is formed by splicing pipe rings, the pipe rings are formed by splicing pipe pieces, and a rubber sealing gasket is arranged between every two adjacent pipe pieces.

7. The multi-ring segment lining water leakage test device according to claim 4, characterized in that: sealing system still includes the sealed pad of stagnant water, the sealed pad of stagnant water includes upper seal ring circle, lower seal ring circle and sealing strip, the sealing strip is connected the upper seal ring circle with between the lower seal ring circle, the upper seal ring circle is located lining model top surface with the contact department of end closing plate, the lower seal ring circle is located lining model bottom surface with the contact department of end closing plate corresponds two of connecting all be provided with between the side closing plate the sealing strip.

8. The multi-ring segment lining water leakage test device according to claim 7, characterized in that: the end sealing plate and the side sealing plate are provided with grooves, the groove on the end sealing plate is used for embedding and installing the upper sealing ring or the lower sealing ring, and the groove on the side sealing plate is used for embedding and installing the sealing strip.

9. The multi-ring segment lining water leakage test device according to claim 7, characterized in that: the upper sealing ring, the lower sealing ring and the sealing strip are of an integrally formed structure.

10. The test method of the multi-ring segment lining water leakage test device based on claim 1 is characterized in that: the method comprises the following steps:

(1) assembling the equipment:

a. assembling a lining model according to a tunnel lining, assembling pipe pieces to form pipe rings by adopting pipe pieces, assembling the pipe pieces by using bolts, arranging rubber sealing gaskets between the adjacent pipe pieces, assembling and connecting the assembled pipe rings by using bolts to form the lining model, and presetting bolt holes at the top end and the bottom end of the lining model according to design requirements;

b. installing a water-stopping sealing gasket on the lining model, enabling reserved holes on an upper sealing ring and a lower sealing ring to correspond to preset bolt holes at two ends of the lining model, assembling an external sealing steel shell, enabling end bolt holes at two ends of the semicircular steel shell to correspond to the reserved bolt holes on the lining model, fixing the semicircular steel shell and the lining model through connecting bolts, enabling the upper sealing ring and the lower sealing ring to be just embedded into grooves of sealing plates at corresponding ends, enabling a sealing strip to be just embedded into a groove on a side sealing plate, enabling the two semicircular steel shells to be connected and assembled through side bolt holes reserved on the side sealing plate between the two semicircular steel shells through the fixing bolts, and forming a pressurizing closed cavity;

c. connecting a water adding pressure system with a water injection hole and a pressurizing exhaust valve, and installing a load loading device for simulating different deformations of the lining model at a hollow position in the lining model;

(2) simulation test:

a. and (3) no-load test:

opening a pressurizing exhaust valve, carrying out water injection operation on a pressurizing closed cavity by a water injection system through a water injection hole until the pressurizing closed cavity is filled with water, closing the pressurizing exhaust valve, continuously injecting water and pressurizing the pressurizing closed cavity through the pressurizing exhaust valve, observing the water leakage condition of a lining model, checking the waterproof performance of the lining model, and discharging the water in the pressurizing closed cavity through the water injection hole after the test is finished;

adjusting bolts on the segments of the lining model, adjusting segment staggering or opening amount of the lining model to simulate different states of segment splicing, repeating the first step, and performing pressurization test on the lining model in the state to test the waterproof capacity;

repeating the step two times;

b. testing under load:

starting a load loading device, applying a pushing load to the inner side of a lining model to enable the lining model to generate structural deformation so as to simulate tunnel deformation under the action of construction load and soil water pressure, then opening a pressurizing exhaust valve, carrying out water injection operation on a water injection system in a pressurizing closed cavity through a water injection hole until the pressurizing closed cavity is filled with water, closing the pressurizing exhaust valve, continuously injecting water and pressurizing in the pressurizing closed cavity through the pressurizing exhaust valve, observing the water leakage condition of the lining model, testing the waterproof performance of the lining model, and discharging water in the pressurizing closed cavity through the water injection hole after the experiment is finished;

adjusting the load value applied to the lining model by the load loading device, repeating the steps, testing the waterproof capacity by pressurizing, and testing the waterproof performance of the lining model under different load deformations;

repeating the step two times;

adjusting bolts on the segments of the lining model, adjusting the segment staggering or opening amount of the lining model to simulate different states of segment splicing, repeating the processes from the first step to the second step, and performing pressurization test on the lining model in the state to test the waterproof capacity;

fifthly, repeating the step (iv) for at least two times.

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