JP3017461B2 - Construction method of the inspection walkway inside the tower - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction method of an inspection corridor for installing an inspection corridor inside a tower-like structure such as a silo for storing coal, grain and the like.

[0002]

2. Description of the Related Art In a large-diameter silo or the like in which a roof is provided on an upper part of a tower body, when an inspection corridor for checking a storage state in the silo is installed in a lower part of the roof, the inspection corridor is built in the silo body. After the construction is completed, it can be done before or after building the roof. In the lift-up method in which the roof is lifted and lifted by a lift-up facility installed above the silo main body, the construction of the inspection corridor is performed at the same time as the construction of the roof or limited to thereafter.

[0003]

When the inspection corridor is to be built before the roof is constructed, a method of sequentially lifting and fixing the corridor panels and the like with a winch or the like installed on the upper portion of the silo body is conceivable. However, in this method, since the roof cannot be constructed using the lift-up method, it takes time, and there is a problem that the construction period is greatly extended.

[0004] When the inspection walkway is to be built at the same time when the roof is lifted up, the inspection walkway is assembled beforehand under the roof to be lifted up, and the inspection walkway is connected to the lower part of the roof to perform the inspection at the same time when the roof is lifted up. There is a method of lifting the corridor, but if the inspection corridor is installed and fixed on the inner wall of the silo body, the outer peripheral part of the inspection corridor hits the inner wall of the silo body during lifting, and it is impossible to lift the inspection corridor Problems arise.

[0005] If the inspection corridor is to be built after the roof has been constructed, it is necessary to install a support in the silo and install and fix the inspection corridor. There is a huge problem.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to enable an inspection corridor to be built with a small number of temporary materials and to easily and quickly install an inspection corridor. Can be fixed, excellent workability,
An object of the present invention is to provide a construction method of an inspection corridor in a tower, which can shorten a construction period and reduce costs.

[0007]

The construction method of the inspection corridor in the first tower according to the present invention is applied to a tower-like structure having a roof, and the inspection corridor is constructed by using a roof lifted up. When installing a ring-shaped inspection corridor on the inner wall of the tower, at the time of laying the roof to build up the lift, assemble the inspection corridor in advance and make the outer diameter smaller than the inner diameter of the tower Secured, the inspection corridor is connected to the lower part of the roof at multiple locations in the circumferential direction of the roof with cables (wire cables, wire ropes, etc.) equipped with length adjustment devices (chain blocks, etc.) and lifted up When the roof is lifted with the roof and the roof is fixed to the upper part of the tower, the outer diameter is adjusted by loosening the securing of the inspection corridor and expanding the diameter of the inspection corridor by its own weight, and the horizontality of the inspection corridor is adjusted to the above length. Adjust with the adjustment device After, characterized in that to secure the inspection walkway on the inner wall of the tower body.

The second construction method of the inspection corridor in the tower body according to the present invention is a construction method in which the inspection corridor is built in a tower-like structure without a roof, and a ring-shaped inspection corridor is installed on the inner wall of the tower body. In doing so, a plurality of lifting machines (such as winches) are installed at the upper part of the tower at intervals in the circumferential direction of the tower, and an inspection corridor is assembled at the lower part of the tower and the outer diameter is smaller than the inner diameter of the tower The inspection corridor is lifted through cables (wire cables, wire ropes, etc.) of the lifting machine, and when the inspection corridor reaches a predetermined installation height,
The outer diameter is adjusted by loosening the securing of the inspection corridor and expanding the diameter of the inspection corridor by its own weight. After adjusting the level of the inspection corridor with the hoist, the inspection corridor is fixed to the inner wall of the tower. It is characterized by the following.

In the above construction method, the entire inspection corridor is pre-assembled on the ground, and the outer diameter is made smaller than the inner diameter of the silo by securing the inspection corridor. Alternatively, it can be lifted at a stretch using a winch or other lifting machine, and the inspection corridor can be automatically expanded at the installation position, and its horizontality can be easily adjusted with a cable length adjustment device or lifting machine. Therefore, the inspection corridor can be built with a small amount of temporary materials, and the inspection corridor can be easily and quickly installed and fixed.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the illustrated embodiments. This is because the diameter for storing coal etc. is about 5
This is an example applied to a 0 m silo or the like. 1 and 2 show a first embodiment which is applied to a silo or the like having a roof and lifts an inspection corridor simultaneously with lift-up of a roof. 3 and 4
Shows a second embodiment in which an inspection corridor is built in a silo or tank without a roof.

In FIGS. 1 and 2, the silo 1 mainly comprises a cylindrical silo body 2 made of concrete and a roof structure 3 made of steel. The roof structure 3
For example, it is divided into a roof structure central portion 3A having a circular shape in plan view and a ring-shaped roof structure outer peripheral portion 3B having a minimum ring width in plan view, and assembling the roof structure central portion 3A on the ground. The outer peripheral portion 3B of the roof structure is assembled on the upper end of the silo body 2 which has been completed, and the outer peripheral portion 3B of the roof structure is assembled.
Ring-shaped temporary structure 4 for lifting up above
And the lift-up facility 6 installed on the support gantry 5 of the temporary structure 4 lifts up the roof structure central portion 3A at a stretch. The lift-up reaction force can also be processed by the back tension cable 7 or the like.

In FIG. 1 to FIG. 4, the inspection corridor 10 includes a large number of corridor panels 11, a support bracket 12 for fixing each corridor panel 11 to the inner wall of the silo main body 2, and a standing corridor on the inner peripheral portion of each corridor panel 11. A handrail 13 is provided and a safety net 16 suspended by a single pipe 14 and a wire 15 below each corridor panel 11 when the inspection corridor is built. As shown in FIG. 4, each of the corridor panels 11 is connected to the silo body 2 when the corridor panels 11 are connected without any gap.
Is formed in an arc shape so as to have a ring having an outer diameter smaller than the inner diameter of the tie wire rope 1 along the inner peripheral portion thereof.
7 are provided, and a tie 18 is provided between the corridor panels 11.

The binding wire rope 17 is arranged in a ring shape along the inner peripheral portion of each corridor panel 11 by using a handrail 13 or the like, and a tensile force T is introduced into the binding wire rope 17 by a chain block (not shown) or the like. I do. Tightening bracket 18
Are, for example, bolts and nuts, so that the end portions of the corridor panels 11 can be connected to each other. In addition, each corridor panel 1
When 1 is fixed to the inner wall of the silo main body 2, a gap is formed between the plate ends. However, it is tightened with bolts and nuts by interposing a spacer between the plate ends.

In the inspection corridor 10 constructed as described above, in the first embodiment shown in FIGS. 1 and 2, the inspection corridor 10 is lifted by using a roof which is lifted up. Therefore, a wire cable 21 provided with a chain block 20 for length adjustment and a suspension member 22 for connecting the upper end of the wire cable 21 to the outer periphery of the center portion 3A of the roof structure are used. The upper ends of the two wire cables 21 are connected to the suspension member 22, and the lower ends of the respective wire cables 21 are connected to the inner peripheral portion and the outer peripheral portion of the inspection corridor 10, respectively.

A plurality of these wire cables 21 and suspension members 22 are arranged at equal intervals in the circumferential direction.

Here, the suspension member 22 is fixed to the lower end of the outer periphery of the central portion 3A of the roof structure, and has a shape extending along the lower surface of the outer peripheral portion 3B of the roof structure. The wire cable 21 is connected to the tip of the suspension member 22. Due to the arrangement of the suspension members 22 and the diameter reduction by securing the inspection corridor 10, the upper suspension point of the suspension member 22 is shifted to the inner surface side of the silo main body 2 from the lower connection point of the inspection corridor 10. As shown in FIG. 5, an outward moving force F acts on the inspection corridor 10, and when the fastening by the binding wire rope 17 and the binding metal 18 is released, the inspection corridor 10 is automatically expanded in diameter by the moving force F. Then, it can be brought close to the inner surface of the silo main body 2.

In the above-described first embodiment, the inspection corridor is built according to the following procedure (see FIGS. 1 and 2).

(1) When the lower part 2A of the hopper / silo main body of the silo main body 2 is constructed, and when the lower construction is completed, a temporary gantry is assembled on the lower part 2A of the hopper / silo main body, and the roof structure is placed on the temporary gantry. Assemble the central portion 3A using a crane. Roof finishing work and facility work are performed on the central portion 3A of the roof structure, and in parallel with this, the cylindrical portion 2B of the silo main body 2 is constructed using a sliding foam method or the like.

(2) When the silo main body 2 is completed, a roof structure outer peripheral portion 3B is assembled on the upper end portion of the silo main body 2 using a crane, and a bundle material is erected on the roof structural outer peripheral portion 3B to make a temporary structure. Assemble 4. The bear lock jack of the lift-up facility 6 is installed on the support gantry 5 and the back tension cable 7 is arranged.

(3) At the time of framing the central part 3A of the roof structure,
The inspection corridor 10 is assembled under the roof structure center part 3A. The inspection corridor 10 is secured by using a tying wire rope 17 and a tying metal fitting 18 so that its outer diameter is smaller than the inner diameter of the silo main body 2 as shown in the left half of FIG. . As a result, the inspection corridor 10 is
Can be lifted along the inner wall without any problem.

(4) The upper ends of the two wire cables 21 are connected to the suspension member 22 attached to the outer peripheral lower end of the roof structure central portion 3A, and the lower ends are connected to the inner peripheral portion and the outer peripheral portion of the inspection corridor 10. . The lower part of the inspection corridor 10 such as the single pipe 14 may be sequentially attached at the time of lifting up.

(5) The central portion 3A of the roof structure is lifted up, and the inspection corridor 10 is lifted together with the lift of the central portion 3A of the roof structure. The lift-up of the roof structure central portion 3A is performed by connecting the lower end of the suspension rod of each lift-up facility 6 to a node at the peripheral edge of the roof structure central portion 3A via a connector, and using a bear lock jack, the suspension rod, That is, the central portion 3A of the roof structure is pulled up by a scale insect method. The lifting speed is about 12 cm / min, and this lift-up step can be performed in about two days including work such as measurement. During this lift-up, the deformation of the temporary structure 4 can be adjusted by adjusting the tension of the back tension cable 7.

(6) When the roof structure central portion 3A reaches a predetermined height, the lift-up is terminated, and the outer peripheral end surface of the roof structural central portion 3A and the inner peripheral end surface of the roof structural outer peripheral portion 3B,
That is, the vertical joining surfaces of the diagonal members and the diagonal members are bolted together via a splice plate.

(7) The inspection corridor 10 has risen to a predetermined installation height, and if the fastening by the tying wire rope 17 and the tying bracket 18 is loosened, the outer diameter of the inspection corridor 10 becomes the above-described moving force. F automatically expands to equal the inner diameter of the silo body 2. Further, by adjusting the length of the wire cable 21 with the chain block 20, the horizontality of the inspection corridor 10 is made appropriate.

(8) At the installation position of the inspection corridor 10 on the inner wall of the silo main body 2, a mounting plate 23 with an anchor is provided.
When the adjustment is completed, the base of the support bracket 12 is fixed to the mounting plate 23. Although there is a gap between the corridor panels 11, each corridor panel 1
The two end portions are fixed to each other with a tie 18. From the above,
The inspection corridor 10 is installed and fixed on the inner wall of the silo body 2.

When the above steps are completed, the temporary equipment and materials such as the temporary structure 4, the supporting gantry 5, and the lift-up facility 6 are removed, and the silo 1 is finished.
In the construction of the inspection corridor of the present invention, the lift lift-up method of the roof is not limited to the above-described method,
Other lift-up methods may be used.

Next, in the second embodiment shown in FIGS. 3 and 4, the inspection corridor 10 is installed in a silo or tank without a roof. Therefore, the inspection corridor 1 is provided by the winch 30 installed on the upper part of the silo body 2 and the wire cable 31 thereof.
Lift 0. At the upper part of the silo body 2, the base of the support 32 is fixed so that the tip protrudes inward. Two winches 30 are installed at the tip of the support 32, and the lower ends of the respective wire cables 31 are connected. It is connected to the inner and outer peripheral parts of the inspection corridor 10. A plurality of the winches 30 and the support bases 32 are arranged at equal intervals in the circumferential direction.

In the second embodiment, as in the first embodiment, the upper suspension point of the winch 30 is shifted to the inner surface side of the silo main body 2 from the lower connection point of the inspection corridor 10, as shown in FIG. As described above, the outward moving force F acts on the inspection corridor 10, and if the securing by the tying wire rope 17 and the tying member 18 is released, the inspecting corridor 10 is automatically expanded in diameter by the moving force F, and the silo is released. It is configured to be close to the inner surface of the main body 2. The configuration of the inspection corridor 10 is the same as that of the first embodiment.

In the second embodiment described above, the inspection walkway is built according to the following procedure (see FIGS. 3 and 4).

(1) The lower part 2A of the hopper / silo main body of the silo main body 2 is constructed, and when this lower construction is completed, the cylindrical portion 2B of the silo main body 2 is constructed using a sliding foam method or the like. In parallel with this construction work, the inspection corridor 10
Also assemble.

(2) When the silo body 2 is completed, a support 32 is fixed on the silo body 2 and the support 32
The two winches 30 are installed at the tip of the.

(3) The inspection corridor 10 includes the binding wire rope 1
By tying with the use of the tie 7 and the binding metal 18, the outer diameter is made smaller than the inner diameter of the silo main body 2 as shown in the left half of FIG. Thereby, the inspection corridor 10 can be lifted along the inner wall of the silo main body 2 without any problem.

(4) Connect the lower end of the wire cable 31 of the winch 30 to the inner and outer peripheral portions of the inspection corridor 10.

(5) The inspection corridor 10 is lifted by two winches 30 to a predetermined installation height and stopped.

(6) Tightening wire rope 17 of inspection walkway 10
And loosen the tying by the tying bracket 18.

As a result, the outer diameter of the inspection corridor 10 automatically expands due to the above-mentioned moving force F, and becomes equal to the inner diameter of the silo main body 2. Furthermore, by adjusting the length of the wire cable 31 in each winch 30, the level of the inspection corridor 10 is made appropriate.

(7) When the adjustment is completed, the base of the support bracket 12 is fixed to the mounting plate 23. Although there is a gap between the corridor panels 11, the ends of the corridor panels 11 are fixed to each other with the fasteners 18. As described above, the inspection corridor 10 is installed and fixed on the inner wall of the silo main body 2.

(8) When the installation and fixing of the inspection corridor 10 is completed, the winch 30 and the support base 32 are removed from the upper part of the silo main body 2.

In the second embodiment, the case where the inspection corridor is built in a silo or the like without a roof is shown. However, after the roof is constructed by the lift-up method, the inspection corridor is lifted up by a winch and fixed. It is also possible. In this case, the winch may be installed on the upper part of the silo main body, or the wire cable of the winch installed on the ground may be wound around the pulley on the upper part of the silo main body and the tip may be connected to the inspection corridor.

Although the above embodiments have been described with reference to silos, it goes without saying that the present invention can be applied to tower-like structures such as tanks. Further, it is needless to say that the present invention can be applied not only to a large-diameter silo or the like but also to a tower-like structure of a general scale.

[0041]

According to the present invention, the inspection corridor is secured on the ground by securing the inspection corridor smaller than the inner diameter of the tower body such as a silo, and the inspection corridor is utilized by using a roof lifted up or by using a lifting machine. After reaching the installation position at once, loosen the securing of the inspection corridor and expand the diameter by the weight of the inspection corridor, and adjust the level of the inspection corridor with the lifting cable length adjustment device or lifting machine. Since the inspection corridor is fixed to the inner wall of the tower, the following effects can be obtained.

(1) The secured inspection corridor is lifted at once using a lifted roof or using a lifting machine, so that an enormous amount of temporary materials as in the related art is not required and is small. Inspection corridors can be built with temporary materials.

(2) Furthermore, the inspection corridor, which was lifted at once,
By loosening the lashing, the diameter is automatically expanded, the level can be easily adjusted, and the inspection corridor can be easily and quickly installed and fixed.

(3) The workability is extremely good and the number of temporary materials is small, so that the construction period can be shortened and the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a first embodiment of a construction method for an inspection corridor according to the present invention.

FIG. 2 is a partially enlarged sectional view of FIG.

FIG. 3 is a sectional view showing a second embodiment of the construction method of an inspection walkway according to the present invention in the order of steps.

FIG. 4 is a plan view of FIG. 3, wherein (a) shows the upper part of the silo body, and (b) shows the installation position of the inspection corridor.

FIG. 5 is a perspective view showing various forces acting when lifting the inspection walkway of the present invention.

[Explanation of Signs] 1. Silo (tower-like structure) 2. Silo body 2A. Lower part of hopper / silo body 2B. Silo body cylindrical part 3. Roof structure 3A. Roof structure center part 3B. DESCRIPTION OF SYMBOLS 4 ... Temporary structure 5 ... Support gantry 6 ... Lift-up equipment 7 ... Back tension cable 10 ... Inspection walkway 11 ... Walkway panel 12 ... Support bracket 13 ... Handrail 14 ... Single pipe 15 ... Wire 16 ... Safety net 17 ... Tightening wire Rope 18 ... Tightening bracket 20 ... Chain block 21 ... Wire cable 22 ... Suspension member 23 ... Mounting plate 30 ... Winch 31 ... Wire cable 32 ... Support base

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Takeya Taguchi 6-2-10 Ginza, Chuo-ku, Tokyo Inside Tomoe Corporation (56) References JP-A-6-26190 (JP, A) (58) Field surveyed (Int.Cl. ⁷ , DB name) E04G 21/14 E04G 3/14 E04H 7/26

Claims (2)

(57) [Claims] 1. When installing a ring-shaped inspection corridor on the inner wall of a tower body, at the time of roof erection to construct a lift-up construction,
Assemble the inspection corridor in advance and secure it so that its outer diameter is smaller than the inner diameter of the tower body, and connect this inspection corridor to the lower part of the roof at several locations in the roof circumferential direction with cables equipped with a length adjustment device. When the roof is fixed to the upper part of the tower, the outer diameter is adjusted by loosening the securing of the inspection corridor and expanding the diameter by the weight of the inspection corridor. A method for constructing an inspection corridor in a tower, wherein the inspection corridor is fixed to an inner wall of the tower after adjusting the levelness with the length adjusting device. 2. When installing a ring-shaped inspection corridor on the inner wall of the tower, a plurality of lifting machines are installed at an upper part of the tower at intervals in the circumferential direction of the tower, and an inspection corridor is provided at a lower part of the tower. Assembling and securing the outer diameter of the inspection corridor to be smaller than the inner diameter of the tower body, lifting this inspection corridor via the cables of the above-mentioned lifting machine, and when the inspection corridor reaches a predetermined installation height, secures the inspection corridor. Adjusting the outer diameter by loosening the tie and expanding the diameter with the own weight of the inspection corridor, adjusting the horizontality of the inspection corridor with the hoist, and then fixing the inspection corridor to the inner wall of the tower The construction method of the inspection walkway inside the tower.