CN211374303U - Hydraulic test loading system for deep tunnel segment joint - Google Patents
Hydraulic test loading system for deep tunnel segment joint Download PDFInfo
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- CN211374303U CN211374303U CN201922398656.4U CN201922398656U CN211374303U CN 211374303 U CN211374303 U CN 211374303U CN 201922398656 U CN201922398656 U CN 201922398656U CN 211374303 U CN211374303 U CN 211374303U
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- 238000012360 testing method Methods 0.000 title claims abstract description 43
- 229910000831 Steel Inorganic materials 0.000 claims description 13
- 239000010959 steel Substances 0.000 claims description 13
- 238000003466 welding Methods 0.000 claims description 3
- 239000003921 oil Substances 0.000 description 65
- 238000010276 construction Methods 0.000 description 7
- 238000013461 design Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 238000000429 assembly Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
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Abstract
The utility model provides a hydraulic test loading system for a deep tunnel segment joint, which comprises a underframe beam, a horizontal loading mechanism for applying load to the end surface of a segment and a vertical loading mechanism for applying load to the side surface of the segment; the horizontal loading mechanism comprises a first clamping block assembly and a second clamping block assembly which are movably arranged on the underframe beam, and a horizontal loading reclining device fixed on the underframe beam; the horizontal loading reclining device is connected with the first clamping block assembly through a pull rod, and a horizontal oil cylinder with a piston rod connected with the second clamping block assembly is arranged on the horizontal loading reclining device; the vertical loading mechanism comprises a top beam fixed above the middle part between the first clamping block assembly and the second clamping block assembly; a plurality of vertical oil cylinders are fixed on the top beam, piston rods of the vertical oil cylinders are connected with a vertical oil cylinder pad beam, and a vertical loading part is arranged on the bottom surface of the vertical oil cylinder pad beam. The advantages are that: the loading position of the duct piece can be flexibly adjusted, and the adaptability and the test range of the loading system are widened.
Description
Technical Field
The utility model relates to an experimental facilities of dark tunnel section of jurisdiction ring in tunnel especially relates to a dark tunnel section of jurisdiction connects hydraulic test loading system.
Background
The importance of underground rail traffic is highlighted day by day when large urban traffic is increasingly congested. In the construction of underground traffic in China, the shield method is widely applied. The shield segment design is used as an important ring in shield construction, and directly determines the cost of shield construction and the safety factor of the construction, wherein the cost is three times or even nearly half. How to design the shield segment capable of ensuring safety on the premise of avoiding waste can be said to determine the quality of one shield construction to a great extent. Therefore, the mechanical property of the shield segment must be tested in advance, the actual load is simulated, and various design indexes are verified. The lining structure of the two shield tunnels is formed by connecting shield segments through joints, so that the shield segment joints are easy to damage as a connecting device and a weak link of the segments, and the joints can cause serious influence on construction and operation of a project once being damaged and are very difficult to repair. Therefore, the analysis and research of the stress characteristics of the segment joint are very important. The stress characteristics of the shield tunnel need to be tested through a segment joint test, so that test data are provided for design, construction and operation of the shield tunnel.
The loading device for the existing segment joint test is characterized in that two ends of a test segment are placed on L-shaped plates, and the L-shaped plates are bolted on an L-shaped beam of the test device. During testing, a jack on the right side of the testing device applies leftward thrust to the L-shaped beam on the right side so as to simulate axial pressure of a segment joint, and a jack above the testing device applies vertical force to a segment through a vertical stress application beam so as to simulate bending moment of the segment joint. In this kind of structure, the relative position of the jack above experimental section of jurisdiction and testing arrangement is unable nimble to be adjusted, not only tests still need to reform transform to the section of jurisdiction of different specifications, and section of jurisdiction loading position also can't adjust according to the on-the-spot demand when carrying out vertical loading experiment moreover.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the structural shortcoming of prior art, provide a dark tunnel section of jurisdiction joint hydraulic test loading system.
In order to achieve the above object, the embodiment of the utility model provides a deep tunnel segment joint hydraulic test loading system, realize through following technical scheme:
the utility model provides a dark tunnel segment joint hydraulic test loading system which characterized in that: the hydraulic test loading system for the deep tunnel segment joint comprises a underframe beam, a horizontal loading mechanism for applying load to the end face of the deep tunnel segment and a vertical loading mechanism for applying load to the side face of the deep tunnel segment;
the horizontal loading mechanism comprises a first clamping block assembly and a second clamping block assembly which are movably arranged on the underframe beam, and a horizontal loading reclining device fixedly arranged on the underframe beam; the main bodies of the first clamping block assembly and the second clamping block assembly are L-shaped box bodies consisting of a vertical box part and a bottom box part, and the vertical box part and the horizontal loading reclining device of the first clamping block are connected through a plurality of horizontal pull rods; the bottom box parts of the first clamping block assembly and the second clamping block assembly are opposite, vertical loading supporting parts for placing deep tunnel pipe pieces are formed on the top surfaces of the bottom box parts of the first clamping block assembly and the second clamping block assembly, and horizontal loading supporting parts which are abutted against the end surfaces of the deep tunnel pipe pieces when the deep tunnel pipe pieces are placed on the vertical loading supporting parts are respectively arranged above the vertical loading supporting parts of the vertical box parts of the first clamping block assembly and the second clamping block assembly; a plurality of horizontal oil cylinders are fixedly arranged on the horizontal loading reclining device, and piston rods of the horizontal oil cylinders are fixedly connected with the other side surface of the second clamping block assembly, which is opposite to the horizontal loading supporting part;
the vertical loading mechanism comprises a top beam fixedly arranged above the middle part between the first clamping block assembly and the second clamping block assembly; the top beam is fixedly provided with a plurality of vertical oil cylinders, the end parts of piston rods of the vertical oil cylinders are fixedly installed with a vertical oil cylinder pad beam, and the bottom surface of the vertical oil cylinder pad beam is provided with a plurality of vertical loading parts for applying load to deep tunnel segments;
in addition, the deep tunnel segment joint hydraulic test loading system further comprises a hydraulic driving mechanism for driving the vertical oil cylinder and the horizontal oil cylinder.
The bottom surfaces of the first clamping block assembly and the second clamping block assembly are provided with pad sticks movably supported on the underframe beam, and the pad sticks are supported and connected to the bottom surfaces of the first clamping block assembly or the second clamping block assembly through the pad sticks.
The first clamp block assembly also has a positioning mechanism for selectively securing to the undercarriage beam.
The bottom surface of the first clamping block assembly is further fixedly provided with an adjusting frame and a bottom hinge, and the adjusting frame is provided with a plurality of fastening screws.
And loading base plates are arranged on the side surface of the vertical box part and the top surface of the bottom box part to form the horizontal loading supporting part and the vertical loading supporting part.
The side face of the vertical box part and the top face of the bottom box part are welded with loading lining plates, and the loading lining plates are perforated steel plates and are fixed into a whole through bolts.
The top beam and the underframe beam are connected through a plurality of vertical pull rods.
The vertical loading part is as follows: the bottom surface welding of vertical hydro-cylinder floorbar has the round steel, the round steel lower extreme is equipped with the bottom plate of round steel synteny.
Compared with the prior art, the beneficial effects of the utility model are that: the first clamping block assembly and the second clamping block assembly are movably arranged on the underframe beam, the horizontal loading reclining device is connected with the first clamping block assembly through the pull rod, meanwhile, the first clamping block assembly is provided with a positioning mechanism which can be selectively fixed on the underframe beam, and an upper horizontal oil cylinder piston rod of the horizontal loading reclining device is fixedly connected with the second clamping block assembly. By adopting the structure, the loading system can adapt to the segments with different specifications by adjusting the pull rod and the positioning mechanism. Meanwhile, the loading position of the duct piece can be flexibly adjusted when a vertical loading experiment is carried out. The adaptability and the test range of the loading system are widened.
Drawings
The above features and advantages of the present invention will become more apparent and readily appreciated from the following description of the exemplary embodiments thereof taken in conjunction with the accompanying drawings.
Fig. 1 is a structural diagram I of a loading system for a deep tunnel segment joint hydraulic test according to an embodiment of the present invention;
fig. 2 is a structural diagram II of the loading system for the hydraulic test of the deep tunnel segment joint of the embodiment of the present invention;
fig. 3 is a schematic diagram of a hydraulic system according to an embodiment of the present invention.
Detailed Description
The invention will be described in further detail below with reference to the accompanying drawings so as to facilitate understanding by those skilled in the art:
referring to fig. 1-3, the utility model provides a dark tunnel segment joint hydraulic test loading system for dark tunnel segment 1 carries out the loading experiment, this dark tunnel segment joint hydraulic test loading system mainly includes:
The underframe beam 2 is a box structure formed by welding a plurality of steel plates, and forms a base of the loading system.
The horizontal loading mechanism 3 is used for applying load to the end face of the deep tunnel segment. The horizontal loading mechanism 3 includes first and second clamp block assemblies 31 and 32 and a horizontal loading reclining device 33. Wherein:
the first clamping block assembly 31 and the second clamping block assembly 32 can be movably arranged on the underframe beam 2. Specifically, the bottom surface of the first clamping block assembly 31 is provided with a pad roller 311 movably supported on the underframe beam, and the pad roller 311 is connected to the bottom surface of the first clamping block assembly 31 through a pad roller support 312. The bottom surface of the second clamping block assembly 32 is provided with a pad stick 321 movably supported on the underframe beam, and the pad stick 321 is connected to the bottom surface of the second clamping block assembly 32 through a pad stick support 322. In addition, the first clamping block assembly 31 further has a positioning mechanism for selectively fixing to the chassis beam 2, in this embodiment, the positioning mechanism is an adjusting frame 313 and a bottom hinge 314 disposed on the bottom surface of the first clamping block assembly 31, and a plurality of set screws are disposed on the adjusting frame 313, thereby completing the relative positioning of the first clamping block assembly 31 and the chassis beam 2.
The main bodies of the first clamping block assembly 31 and the second clamping block assembly 32 are both L-shaped box bodies formed by a box standing part and a bottom box part, the horizontal loading reclining device 33 is connected with the box standing part of the first clamping block assembly 31 through a plurality of horizontal pull rods 34, and the bottom box parts of the first clamping block assembly 31 and the second clamping block assembly 32 are arranged oppositely.
A vertical loading support part 315 for placing deep tunnel pipe sheets is formed on the top surface of the bottom box part of the first clamping block assembly 31, and a vertical loading support part 323 for placing deep tunnel pipe sheets is formed on the top surface of the bottom box part of the second clamping block assembly 32; the vertical box part of the first clamping block assembly 31 is provided with a horizontal loading support part 316 above the bottom box part, wherein the horizontal loading support part 316 is used for abutting against the end surface of the deep tunnel segment 1 when the deep tunnel segment 1 is arranged in the vertical loading support part 315. The vertical box part of the second clamping block assembly 32 is provided with a horizontal loading support part 324 above the bottom box part, and the horizontal loading support part 324 is used for abutting against the end surface of the deep tunnel segment 1 when the deep tunnel segment 1 is arranged on the vertical loading support part 323.
Further, the side face of the vertical box part and the top face of the bottom box part of the first clamping block assembly 31 and the second clamping block assembly 32 are provided with loading lining plates and loading lining plates, the loading lining plates and the loading lining plates are perforated steel plates and are fixed into a whole through bolts, the loading lining plates are welded on the side face of the vertical box part and the top face of the bottom box part, and the outer side faces of the loading lining plates form the horizontal loading supporting part and the vertical loading supporting part.
4 horizontal oil cylinders 4 are fixedly arranged on the horizontal loading reclining device 33, and piston rods 41 of the vertical oil cylinders 4 are fixedly connected with the other surface of the second clamping block assembly 32, which is opposite to the first clamping block assembly 31. Therefore, the horizontal oil cylinder 4 can perform pushing loading or pulling loading on the second clamping block assembly 32, so that the loading force is transmitted to one end face of the deep tunnel segment 1 through the horizontal loading supporting part 324 of the second clamping block assembly 32, and the other end face of the deep tunnel segment 1 is supported by the horizontal loading supporting part 316 of the first clamping block assembly 31. The arrangement of the horizontal loading support part enables loading force to be uniformly transmitted on the outer surface of the deep tunnel segment 1.
The vertical loading mechanism 5 includes a top rail 51 secured above and midway between the first and second clamp block assemblies 31, 32. Specifically, the top beam 51 and the underframe beam 2 are connected by a plurality of vertical tie rods 21.
The top beam 51 is fixedly provided with a plurality of vertical oil cylinders 52, piston rods 521 of the vertical oil cylinders 52 are fixedly provided with vertical oil cylinder pad beams 53, and the bottom surfaces of the vertical oil cylinder pad beams 53 are provided with a plurality of vertical loading parts for applying load to deep tunnel pipe pieces. In this embodiment, the vertical loading portion is: the bottom surface of the vertical oil cylinder pad beam 53 is welded with round steel 531 at a position corresponding to a measuring point on the side surface of the deep tunnel segment, and the lower end of the round steel 531 is provided with a bottom supporting plate 532 which is as long as the round steel 531.
When the test is carried out, the deep tunnel segment 1 is placed on the bottom box parts of the first clamping block assembly 31 and the second clamping block assembly 32, and is clamped by the vertical box parts of the first clamping block assembly 31 and the second clamping block assembly 32. The vertical load test of the deep tunnel segment 1 can be realized by applying a load through the vertical oil cylinder 52, and the horizontal load test of the deep tunnel segment 1 can be realized by applying a load through the horizontal oil cylinder 4.
Referring to fig. 3, the following describes the hydraulic drive mechanism 6 of the present hydraulic system:
the hydraulic drive mechanism 6 includes an oil tank 601, the oil tank 601 is connected to a first oil pump 602, and the first oil pump 602 constitutes a drive mechanism that drives the four horizontal cylinders 4 in the horizontal loading mechanism 3. The specific hydraulic structure is as follows: the first oil pump 602 is connected to the port P of the first check valve 603, the port T of the first check valve 603 is communicated with the port P of the first two-position four-way valve 604, the port P of the first proportional relief valve 605, and the first ports of four first three-position four-way valves 606, and the second ports of the four first three-position four-way valves 606 are respectively connected to the horizontal cylinder 4. The oil return port of the horizontal oil cylinder 4 is connected with the third oil ports of the four first three-position four-way valves 606. The fourth ports of the four first three-position four-way valves 606, the ports T of the first two-position four-way valve 604, and the ports T of the first proportional overflow 605 valve are communicated with the ports P of the first cooler 607, the ports of the first cooler 607 are communicated with the ports P of the first filter 608, and the ports T of the first filter 608 are connected to the oil return port of the oil tank 601, thereby completing the circulation.
In addition, the oil tank 601 is connected to a second oil pump 610, and the second oil pump 610 constitutes a driving mechanism that drives the two vertical oil cylinders 52 in the vertical loading mechanism 5. The second oil pump 610 is connected to the oil port P of the second check valve 611, the oil port T of the second check valve 611 communicates with the oil port P of the second two-position four-way valve 612, the oil port P of the second proportional relief valve 613 and the first oil ports of the two second three-position four-way valves 614, and the second oil ports of the two second three-position four-way valves 614 are respectively connected to the two vertical oil cylinders 52. The oil return port of the vertical oil cylinder 52 is connected to the third oil ports of the four second three-position four-way valves 614. The fourth ports of the four second three-position four-way valves 614, the ports T of the second two-position four-way valve 612, and the ports T of the second proportional relief valve 613 are communicated with the ports P of the second cooler 615, the ports of the second cooler 615 are communicated with the ports P of the second filter 616, and the ports T of the second filter 616 are connected with the oil return port of the oil tank 601, thereby completing the cycle.
In addition, the oil port T of the first check valve 603 is also communicated with a first accumulator 609, a first pressure gauge 617 and a first pressure sensor 618, and the oil port T of the second check valve 611 is also communicated with a second accumulator 619, a second pressure gauge 20 and a second pressure sensor 621 to monitor the state of the hydraulic drive mechanism 6.
After the system is started, the motor drives the plunger pump to output hydraulic oil, loading pressure is set through the electric proportional overflow valve, then pressure is maintained through the three-position four-way valve corresponding to each oil cylinder to achieve continuous loading, and equivalent simulation loading is conducted on a test object through the loading oil cylinders. The main key technical points of the hydraulic unit are as follows:
1) a pressure sensor is arranged near an oil source outlet, the pressure of the system is detected, pressure data feedback is set in an electric control system, the pressure of the system is controlled and adjusted by adjusting an electric proportional overflow valve, closed-loop control is achieved, and the loading precision of the system is guaranteed.
2) Pressure sensors are arranged in rodless cavities of the four loading oil cylinders to detect the loading pressure of the oil cylinders; the set pressure data feedback is carried out through the electric control system, if the loading pressure of the oil cylinder is equal to the set pressure of the system, the middle position of the three-position four-way valve is ensured, the pressure of the system is maintained, and the stable loading pressure is achieved; if the loading pressure of the oil cylinder is smaller than the set pressure of the system, the position of the three-position four-way valve is adjusted, and the high-pressure oil of the system is input into a rodless cavity of the loading oil cylinder and is increased to the set pressure of the system.
3) According to test requirements, the hydraulic unit needs to adjust the loading force step by step, the electric control system adjusts the pressure of the electric proportional overflow valve system according to a program, the positions of the four three-position four-way valves are adjusted at the same time, the pressure of a rodless cavity of the loading oil cylinder is increased, the pressure is increased to the system pressure, and synchronous loading is kept.
4) In order to ensure that the loading pressures of the four horizontal loading oil cylinders can be kept consistent, a three-position four-way valve is particularly set in front of each loading oil cylinder, independent control is carried out through an electric control system and a pressure feedback system, independent adjustment is carried out according to the condition of each loading oil cylinder, and mutual influence is avoided.
5) In order to avoid system impact when the loading pressure is adjusted, an energy accumulator is arranged on the hydraulic unit to adjust pressure fluctuation.
6) In order to reduce test energy consumption and hydraulic oil temperature, a variable plunger pump is adopted in the design process, a large-displacement setting is adopted when an oil cylinder stretches, and a small-displacement setting is adopted when the oil cylinder keeps system load stably; meanwhile, in order to maintain the long-time test requirement, an air cooling cooler is arranged in the system, and the oil temperature is ensured to be in a certain temperature range.
7) After the test is finished, the system needs to be unloaded, the pressure of the system is reduced through the electric proportional overflow valve in the unloading process, then the system retracts through the three-position four-way valve oil cylinder, and the plunger pump is adjusted to be large in displacement.
And when the pressure is stabilized in a state for a long time, the loading pressure is relatively consistent, and large pressure fluctuation cannot be caused. The accumulator can prevent pressure fluctuations.
The present invention is described in detail with reference to the embodiments, but it can be understood by those skilled in the art that the above embodiments of the present invention are only one of the preferred embodiments of the present invention, and for space limitation, all embodiments can not be listed herein one by one, and any implementation that can embody the technical solution of the present invention is within the protection scope of the present invention.
Claims (8)
1. The utility model provides a dark tunnel segment joint hydraulic test loading system which characterized in that: the hydraulic test loading system for the deep tunnel segment joint comprises a underframe beam, a horizontal loading mechanism for applying load to the end face of the segment and a vertical loading mechanism for applying load to the side face of the segment;
the horizontal loading mechanism comprises a first clamping block assembly and a second clamping block assembly which are movably arranged on the underframe beam, and a horizontal loading reclining device fixedly arranged on the underframe beam; the main bodies of the first clamping block assembly and the second clamping block assembly are L-shaped box bodies consisting of a vertical box part and a bottom box part, and the vertical box part and the horizontal loading reclining device of the first clamping block are connected through a plurality of horizontal pull rods; the bottom box parts of the first clamping block assembly and the second clamping block assembly are opposite, vertical loading supporting parts for placing deep tunnel pipe pieces are formed on the top surfaces of the bottom box parts of the first clamping block assembly and the second clamping block assembly, and horizontal loading supporting parts which are abutted against the end surfaces of the deep tunnel pipe pieces when the deep tunnel pipe pieces are placed on the vertical loading supporting parts are respectively arranged above the vertical loading supporting parts of the vertical box parts of the first clamping block assembly and the second clamping block assembly; a plurality of horizontal oil cylinders are fixedly arranged on the horizontal loading reclining device, and piston rods of the horizontal oil cylinders are fixedly connected with the other side surface of the second clamping block assembly, which is opposite to the horizontal loading supporting part;
the vertical loading mechanism comprises a top beam fixedly arranged above the middle part between the first clamping block assembly and the second clamping block assembly; the top beam is fixedly provided with a plurality of vertical oil cylinders, the end parts of piston rods of the vertical oil cylinders are fixedly installed with a vertical oil cylinder pad beam, and the bottom surface of the vertical oil cylinder pad beam is provided with a plurality of vertical loading parts for applying load to deep tunnel segments;
in addition, the deep tunnel segment joint hydraulic test loading system further comprises a hydraulic driving mechanism for driving the vertical oil cylinder and the horizontal oil cylinder.
2. The deep tunnel segment joint hydraulic test loading system of claim 1, wherein: the bottom surfaces of the first clamping block assembly and the second clamping block assembly are provided with pad sticks movably supported on the underframe beam, and the pad sticks are supported and connected to the bottom surfaces of the first clamping block assembly or the second clamping block assembly through the pad sticks.
3. The deep tunnel segment joint hydraulic test loading system of claim 2, wherein: the first clamp block assembly also has a positioning mechanism for selectively securing to the undercarriage beam.
4. The deep tunnel segment joint hydraulic test loading system of claim 3, wherein: the bottom surface of the first clamping block assembly is further fixedly provided with an adjusting frame and a bottom hinge, and the adjusting frame is provided with a plurality of fastening screws.
5. The deep tunnel segment joint hydraulic test loading system of claim 4, wherein: and loading base plates are arranged on the side surface of the vertical box part and the top surface of the bottom box part to form the horizontal loading supporting part and the vertical loading supporting part.
6. The deep tunnel segment joint hydraulic test loading system of claim 5, wherein: the side face of the vertical box part and the top face of the bottom box part are welded with loading lining plates, and the loading lining plates are perforated steel plates and are fixed into a whole through bolts.
7. The deep tunnel segment joint hydraulic test loading system of claim 6, wherein: the top beam and the underframe beam are connected through a plurality of vertical pull rods.
8. The deep tunnel segment joint hydraulic test loading system of claim 7, wherein the vertical loading portion is: the bottom surface welding of vertical hydro-cylinder floorbar has the round steel, the round steel lower extreme is equipped with the bottom plate of round steel synteny.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922398656.4U CN211374303U (en) | 2019-12-27 | 2019-12-27 | Hydraulic test loading system for deep tunnel segment joint |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922398656.4U CN211374303U (en) | 2019-12-27 | 2019-12-27 | Hydraulic test loading system for deep tunnel segment joint |
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| CN211374303U true CN211374303U (en) | 2020-08-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112255109A (en) * | 2020-11-27 | 2021-01-22 | 哈工大机器人湖州国际创新研究院 | Mechanical properties test platform |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112255109A (en) * | 2020-11-27 | 2021-01-22 | 哈工大机器人湖州国际创新研究院 | Mechanical properties test platform |
| CN112255109B (en) * | 2020-11-27 | 2025-07-15 | 浙江臻行科技有限公司 | Mechanical properties testing platform |
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