JP2012122216A - Internal pushing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a compact internal pushing device which can be manufactured as a structure needing neither backing ring nor cushioning material and capable of responding to propulsion work of a short pushing pipe.SOLUTION: A T-shaped internal pushing pipe has an outer diameter slightly smaller than the diameter of a junction collar and is formed such that the length in the pipe axis direction is equal to the sum of the length and the stroke of a hydraulic jack. A cylindrical part, in which a plurality of storage parts for the hydraulic jack are formed, is formed inside the internal pushing pipe, and a rib structure having ribs radially erected on the inner circumference is formed on the side of a barrier wall. The hydraulic jack directs a tip of telescopic motion direction toward a propulsion direction and a jack body is fixed to the storage part by means of a mounting metal fitting. An S-shaped internal pushing pipe is provided with a water cut-off rubber on the outer peripheral surface and has a junction part with ribs radially erected at equal intervals on the inner circumference. A steel collar having a diameter slightly larger than the outer diameter of the cylindrical part is integrated with the S-shaped internal pushing pipe via a rear side barrier wall of the junction part, and a cylindrical part of the T-shaped internal pushing pipe is inserted into the steel collar of the S-shaped internal pushing pipe via a rubber ring for the T-shaped internal pushing pipe.

Description

  The present invention relates to an intermediate pressing device disposed in an intermediate portion of a propelling pipe row and a propulsion method using the intermediate pressing device.

  As shown in FIG. 7, the conventional pushing device used in the propulsion work is a combination of an S-shaped intermediate pusher tube a and a T-shaped intermediate pusher tube b, and the extension direction of the cylinder c of the hydraulic jack d. Each member includes a hydraulic jack d fixed on the S-shaped intermediate pusher tube a side, an abutment wheel e for dispersing the thrust of the hydraulic jack, and a cushion material f for equalizing the thrust hit of the hydraulic jack. It is comprised (nonpatent literature 1).

Propulsion method design integration procedure "Promotion method application section" (long-distance / curve construction) 200 revised edition (9th edition issued on April 1, 2007) Japan Sewerage Pipe Promotion Technology Association released Economic Research Committee 5.3 Middle press propulsion equipment 115 pages

(1) In the conventional intermediate pushing device, the extension direction of the cylinder is arranged in the T-shaped intermediate push pipe, the hydraulic jack fixed on the S-type intermediate push pipe side, the wheel for dispersing the thrust of the hydraulic jack, the hydraulic pressure Because it is made up of cushioning members that equalize the thrust of the jack against the concrete part of the T-type intermediate pusher tube, it is shorter than the standard length of 2.43m for curved propulsion work. For example, even when the construction by the intermediate pressing method with the length of 1.2 m and 0.8 m is adopted, it is difficult to adjust the length of the intermediate pressing device correspondingly (see FIG. 6).

(2) If a special short hydraulic jack is used in order to improve the above problems, it is possible to produce a slightly shorter intermediate pushing device, but a special hydraulic jack with a length will be used and the cost will be reduced. It will be up. By using a shorter hydraulic jack, there is a problem that the length of pushing the forward-side propulsion pipe with a single stroke is shortened, and work efficiency is reduced.

(3) When the hydraulic jack is mounted directly in the collar of the S-shaped intermediate push tube, the steel cylindrical part is deformed into an oval shape due to the weight of the hydraulic jack, and the S-shaped intermediate push tube and the T-shaped intermediate push tube are There is a problem in that it may adversely affect the water tightness of the water.

(4) In the conventional intermediate pushing device, since the short intermediate pushing device corresponding to the short tube suitable for the curve driving of the steep angle could not be used, the length of the short pushing tube is different from that of the middle pushing tube. There is a problem that this part may cause loosening of the natural ground when passing through the tunnel.

(5) Since the conventional T-shaped intermediate pusher tube has a reinforced concrete structure with the outer side covered with a steel plate and does not have a wheel function, the thrust of the hydraulic jack is concentrated and loaded near each jack. is there.

(6) The collar part of the S-type intermediate pusher tube has a considerable length because it serves as a part for housing each member such as a hydraulic jack, a wheel, a cushion material, and a pushing allowance when the stroke of the hydraulic jack is extended. There is a problem that is necessary.

  In view of the above problems, the present invention can be manufactured in a compact intermediate pressing device having an unnecessary structure for the wheel and the cushion material, and a propulsion method using this intermediate pressing device capable of supporting the propulsion work of a short propulsion pipe. Is related to the provision of

Of the means for solving the above problems, the main configuration of the intermediate pressing device of the present invention is:
In an intermediate press device composed of a combination of a T-type intermediate press tube and an S-type intermediate press tube and a hydraulic jack,
The T-shaped intermediate pusher pipe has an outer diameter slightly smaller than the diameter of the joining collar through a partition wall provided at the tip of the joining collar in the propulsion direction, and the length in the tube axis direction is the length of the hydraulic jack and the hydraulic jack. It is formed in a length that is combined with the stroke, and a cylindrical portion is formed inside that has a plurality of storage portions of the hydraulic jack on the circumference, and radially on the inner circumference on the partition wall side. The hydraulic jack is formed in a rib structure having a ring function with standing ribs, and the hydraulic jack has its front end in the expansion / contraction direction facing the propulsion direction and the rear end is arranged on the front surface of the rib structure. Fix it to the storage part with a mounting bracket,
The S-shaped intermediate pusher pipe is provided with water blocking rubber on the outer peripheral surface, has an outer diameter smaller than the collar of the standard pipe that advances, and has a ring function in which ribs are erected radially at equal intervals on the inner circumference. It has a joint formed in the structure, and a steel collar having a diameter slightly larger than the outer diameter of the cylindrical part is integrally provided via a rear partition wall of the joint,
The cylindrical portion of the T-shaped intermediate pusher tube is inserted into a steel collar of the S-shaped intermediate pusher tube via a rubber ring for the T-shaped intermediate pusher tube so as to be extendable and retractable. .

The other structure in the intermediate pressing device of the present invention is the above main structure,
The rib structure of the T-shaped intermediate pusher tube is characterized in that a storage portion is provided with ribs standing at intervals that can store a hydraulic jack, and concrete is filled between the ribs other than the storage portion. Is.

The other structure in the intermediate pressing device of the present invention is the above main structure,
The combination of the T-shaped intermediate pusher tube and the S-shaped intermediate pusher tube is characterized in that it is formed to have a length about half that of the standard tube.

The main structure in the propulsion method of the present invention is:
In an intermediate press device composed of a combination of a T-type intermediate press tube and an S-type intermediate press tube and a hydraulic jack,
The T-shaped intermediate pusher pipe has an outer diameter slightly smaller than the diameter of the joining collar through a partition wall provided at the tip of the joining collar in the propulsion direction, and the length in the tube axis direction is the length of the hydraulic jack and the hydraulic jack. It is formed in a length that is combined with the stroke, and a cylindrical portion is formed inside that has a plurality of storage portions of the hydraulic jack on the circumference, and radially on the inner circumference on the partition wall side. The hydraulic jack is formed in a rib structure having a ring function with standing ribs, and the hydraulic jack has its front end in the expansion / contraction direction facing the propulsion direction and the rear end is arranged on the front surface of the rib structure. Fix it to the storage part with a mounting bracket,
The S-shaped intermediate pusher pipe is provided with water blocking rubber on the outer peripheral surface, has an outer diameter smaller than the collar of the standard pipe that advances, and has a ring function in which ribs are erected radially at equal intervals on the inner circumference. It has a joint formed in the structure, and a steel collar having a diameter slightly larger than the outer diameter of the cylindrical part is integrally provided via a rear partition wall of the joint,
An intermediate pressing device is used, wherein the cylindrical portion of the T-shaped intermediate pusher tube is inserted into a steel collar of the S-shaped intermediate pusher tube through a rubber ring for the T-shaped intermediate pusher tube so as to be stretchable. ,
It is said that curve propulsion is performed so as not to affect the natural ground by the intermediate pushing device which is about half the length of the standard pipe.

Since the present invention has the above-described configuration, the following effects are obtained.
(1) According to the present invention, as a result of providing a hydraulic jack housing inside the T-shaped intermediate pusher tube and forming the rear portion of the hydraulic jack and the S-type intermediate pusher tube in the steel rib structure, this rib structure The part performs the wheel function. Therefore, it is not necessary to install the wheel and the cushion material, and the intermediate pressing device can be made compact.

(2) Since the length of the T-type intermediate pusher tube has only to be mainly “the length obtained by adjusting the stroke to the length of the hydraulic jack”, it has become possible to handle the construction of short pipes.
Conventionally, an intermediate pusher tube corresponding to a standard tube having a length of 2.43 m was used, but the intermediate pusher device according to the present invention can produce a short intermediate pusher tube corresponding to a short tube having a length of 1.2 to 0.8 m. .

  (3) The T-type intermediate pusher tube is formed in a rib structure that reinforces the space between the hydraulic jack and the rib structure behind the hydraulic jack that transmits thrust, so when the hydraulic jack is fixed to the storage part in the cylindrical part Since the deformation with respect to the weight is small, the influence on the water tightness at the joint portion of the T-shaped intermediate pusher tube and the S-shaped intermediate pusher tube is reduced.

  (4) According to the propulsion method of the present invention, during the propulsion, the cylindrical portion of the T-type inner presser tube is accommodated within the collar of the S-type intermediate presser tube. Smooth curve propulsion work is possible without being suppressed.

  (5) According to the propulsion method of the present invention, it is possible to use a short intermediate pusher tube corresponding to a short pipe suitable for sharp curve promotion, so the intermediate pusher tube and the front and rear pipes are the same length. The propulsion method has become possible. Therefore, there is little possibility of causing loosening of the ground due to disturbance of the propulsion alignment, and a standard stroke hydraulic jack can be used, so that the curve propulsion work using the intermediate pushing device can be performed efficiently.

FIG. 3 is a partial cross-sectional view of an intermediate pressing device in which standard tubes are connected to both ends of the present invention. AA sectional drawing of the intermediate pressing apparatus of this invention. BB sectional drawing of the intermediate pressing apparatus of this invention. CC sectional view of the intermediate pressing device of the present invention The partial sectional view at the time of cylinder extension of a hydraulic jack concerning the example of the present invention. (A) is a partial cross-sectional view of the hydraulic jack when the cylinder is compressed, (b) is a partial cross-sectional view of the hydraulic jack when the cylinder is extended, and (c) is a DD cross-section. FIG. 4D is a cross-sectional view taken along the line EE. An explanatory view of an embodiment of a conventional intermediate pressing device. The Example explanatory drawing of the intermediate pressing apparatus of this invention.

  The intermediate pressing device of the present invention will be described with reference to FIGS. 1 to 5 and FIG. FIG. 1 is a partial cross-sectional view of an intermediate pressing device in which a standard pipe is connected to both ends of the present invention, FIG. 2 is a cross-sectional view taken along line AA of the intermediate pressing device of the present invention, and FIG. 4 is a cross-sectional view taken along the line C-C of the intermediate pressing device of the present invention, FIG. 5 is a partial cross-sectional view of the hydraulic jack when the cylinder is extended, and FIG. 8 is an explanatory view of an embodiment of the present invention.

  First, the intermediate pushing device 1 of the present invention is composed of a combination of a T-shaped intermediate pusher tube 2 and an S-shaped intermediate pusher tube 3 and a hydraulic jack 7.

  As shown in FIGS. 1 to 5, the T-shaped intermediate pusher tube 2 has an outer diameter slightly smaller than the diameter of the joining collar 5 through a partition wall 4 provided at the front end of the joining collar 5 in the propulsion direction. A cylindrical portion 8 having a directional length formed by combining the length of the hydraulic jack 7 and the stroke of the hydraulic jack 7 and having a plurality of storage portions 18 of the hydraulic jack 7 formed on the circumference inside is formed. Forming.

  On the partition wall 4 side, a rib structure R having an abutment function in which ribs 6 are erected radially at equal intervals on the circumference of the inner peripheral surface is formed. The hydraulic jack main body 7 a is fixed to the storage portion 18 with the mounting bracket 10 after the rear end is disposed on the front surface of the rib structure R in the propulsion direction.

  As shown in FIGS. 1 to 5, the S-shaped intermediate pusher tube 3 is provided with a water stop rubber 13 on the outer peripheral surface 12 and has an outer diameter smaller than the collar 20 of the standard tube 19 that moves forward, and is equally spaced on the inner circumference. And has a joint portion 14 formed in a rib structure R having a ring function in which ribs 6 are erected radially, and is slightly larger than the outer diameter of the cylindrical portion 8 through a rear partition 15 of the joint portion 14. A steel collar 16 having a diameter is integrally provided.

  The rib structure R of the T-shaped intermediate pusher pipe 2 is provided with a storage portion 18 in which ribs 6 are erected at intervals capable of storing the hydraulic jack 7, and concrete 9 is filled between the ribs 6 other than the storage portion 18. ing. Further, concrete 9 is filled between the ribs 6 of the rib structure R of the S-shaped intermediate pusher 3 (not shown).

  The combination of the T-shaped intermediate pusher tube 2 and the S-shaped intermediate pusher tube 3 is formed to be about half the length of the standard tube 19 and enables curve construction.

  The cylindrical portion 8 of the T-shaped intermediate pusher tube 2 is inserted into a steel collar 16 of the S-shaped intermediate pusher tube 3 via a rubber ring 17 for the T-shaped intermediate pusher tube so as to be stretchable.

Next, the length of the intermediate pressing device is compared between the case where a short hydraulic jack is used for the conventional intermediate pressing tube and the case of the present invention.
A case where a short hydraulic jack is used for a conventional intermediate push pipe will be described with reference to FIG.
In the case of a nominal diameter of 1000 mm,
The length of the S-type intermediate push tube a is 200 mm, a short hydraulic jack is thrust 300 kN, the length B is 350 mm, the cylinder stroke is 200 mm, the wheel C is 70 mm, and the cushion material D is 10 mm. And the length of the T-shaped intermediate pusher tube b: 1150 mm, the total is 1780 mm, and the curve of a short tube cannot be promoted.

The case of the present invention will be described with reference to FIG.
The length of the S-shaped intermediate pusher tube 3 is 200 mm, the hydraulic jack 7 has a thrust force of 300 kN, the length B is 525 mm, and the cylinder stroke is 300 mm. When the length of R is 200 mm, the total length is 925 mm, and the curve of a short tube can be promoted.

  In the propulsion method, as shown in FIG. 5, the standard pipe 19 is joined to the front and rear in the propulsion direction around the intermediate pressing device 1 in the above embodiment, and the water stop rubber 13 is placed in the collar 20 of the standard pipe 19 on the forward side. The joint part 14 is arrange | positioned through this. Thereafter, the joint portion of the standard tube 19 is inserted and disposed in the joint collar 5.

  According to the propulsion method of the present invention, it is possible to carry out steep curve propulsion so as not to affect the natural ground by the intermediate press device 1 having a length of about 60% to half that of the standard pipe 19. Yes.

DESCRIPTION OF SYMBOLS 1 Intermediate pusher 2 T type intermediate pusher pipe 3 S type intermediate pusher pipe 4 Bulkhead 5 Joining collar 6 Rib 7 Hydraulic jack 7a Hydraulic jack main body 8 Cylindrical part 9 Concrete 10 Mounting bracket 11 Cylinder 12 Outer peripheral surface 13 Water stop rubber 14 Joint part 15 Rear partition 16 Steel collar 17 Rubber ring for T-shaped intermediate push pipe 18 Storage part 19 Standard pipe 20 Color R Rib structure

As shown in FIG. 6 , an intermediate pushing device used in a conventional propulsion work has a combination of an S-shaped intermediate pusher tube a and a T-shaped intermediate pusher tube b and the extension direction of a cylinder c of a hydraulic jack d. Each member includes a hydraulic jack d fixed on the S-shaped intermediate pusher tube a side, an abutment wheel e for dispersing the thrust of the hydraulic jack, and a cushion material f for equalizing the thrust hit of the hydraulic jack. It is comprised (nonpatent literature 1).

Of the means for solving the above problems, the main configuration of the intermediate pressing device of the present invention is:
In an intermediate press device composed of a combination of a T-type intermediate press tube and an S-type intermediate press tube and a hydraulic jack,
The T-shaped in押管via a partition wall provided in the propulsion direction leading end portion of the joining collar, a slightly smaller outer diameter than the diameter of the joining collar, the axial length is formed in the length of the hydraulic jack A rib having a ring function in which a cylindrical portion in which a plurality of storage portions of the hydraulic jack are formed on the circumference is formed inside, and ribs are erected radially at equal intervals on the inner circumference on the partition wall side. Formed in the structure, the hydraulic jack is oriented with the front end of the expansion / contraction direction of the cylinder in the propulsion direction, and the rear end is disposed on the front surface of the rib structure, and the hydraulic jack body is fixed to the storage portion with a mounting bracket,
The S-shaped intermediate pusher pipe is provided with water blocking rubber on the outer peripheral surface, has an outer diameter smaller than the collar of the standard pipe that advances, and has a ring function in which ribs are erected radially at equal intervals on the inner circumference. It has a joint formed in the structure, and a steel collar having a diameter slightly larger than the outer diameter of the cylindrical part is integrally provided via a rear partition wall of the joint,
The cylindrical portion of the T-shaped intermediate pusher tube is inserted into a steel collar of the S-shaped intermediate pusher tube via a rubber ring for the T-shaped intermediate pusher tube so as to be extendable and retractable. .

The main structure in the propulsion method of the present invention is:
In an intermediate press device composed of a combination of a T-type intermediate press tube and an S-type intermediate press tube and a hydraulic jack,
The T-shaped in押管via a partition wall provided in the propulsion direction leading end portion of the joining collar, a slightly smaller outer diameter than the diameter of the joining collar, the axial length is formed in the length of the hydraulic jack A rib having a ring function in which a cylindrical portion in which a plurality of storage portions of the hydraulic jack are formed on the circumference is formed inside, and ribs are erected radially at equal intervals on the inner circumference on the partition wall side. Formed in the structure, the hydraulic jack is oriented with the front end of the expansion / contraction direction of the cylinder in the propulsion direction, and the rear end is disposed on the front surface of the rib structure, and the hydraulic jack body is fixed to the storage portion with a mounting bracket,
The S-shaped intermediate pusher pipe is provided with water blocking rubber on the outer peripheral surface, has an outer diameter smaller than the collar of the standard pipe that advances, and has a ring function in which ribs are erected radially at equal intervals on the inner circumference. It has a joint formed in the structure, and a steel collar having a diameter slightly larger than the outer diameter of the cylindrical part is integrally provided via a rear partition wall of the joint,
An intermediate pressing device is used, wherein the cylindrical portion of the T-shaped intermediate pusher tube is inserted into a steel collar of the S-shaped intermediate pusher tube through a rubber ring for the T-shaped intermediate pusher tube so as to be stretchable. ,
It is said that curve propulsion is performed so as not to affect the natural ground by the intermediate pushing device which is about half the length of the standard pipe.

(2) Since the length of the T-type intermediate pusher tube has only to be mainly “the length of the hydraulic jack ” , it has become possible to handle the construction of short pipes.
Conventionally, an intermediate pusher tube corresponding to a standard tube having a length of 2.43 m was used, but the intermediate pusher device according to the present invention can produce a short intermediate pusher tube corresponding to a short tube having a length of 1.2 to 0.8 m. .

As shown in FIGS. 1 to 5, the T-shaped intermediate pusher tube 2 has an outer diameter slightly smaller than the diameter of the joining collar 5 through a partition wall 4 provided at the front end of the joining collar 5 in the propulsion direction. The length of the direction is formed to the length of the hydraulic jack 7, and a cylindrical portion 8 is formed in which a plurality of storage portions 18 of the hydraulic jack 7 are formed on the circumference.

Claims (4)

In an intermediate press device composed of a combination of a T-type intermediate press tube and an S-type intermediate press tube and a hydraulic jack,
The T-shaped intermediate pusher pipe has an outer diameter slightly smaller than the diameter of the joining collar through a partition wall provided at the tip of the joining collar in the propulsion direction, and the length in the tube axis direction is the length of the hydraulic jack and the hydraulic jack. It is formed in a length that is combined with the stroke, and a cylindrical portion is formed inside that has a plurality of storage portions of the hydraulic jack on the circumference, and radially on the inner circumference on the partition wall side. The hydraulic jack is formed in a rib structure having a ring function with standing ribs, and the hydraulic jack has its front end in the expansion / contraction direction facing the propulsion direction and the rear end is arranged on the front surface of the rib structure. Fix it to the storage part with a mounting bracket,
The S-shaped intermediate pusher pipe is provided with water blocking rubber on the outer peripheral surface, has an outer diameter smaller than the collar of the standard pipe that advances, and has a ring function in which ribs are erected radially at equal intervals on the inner circumference. It has a joint formed in the structure, and a steel collar having a diameter slightly larger than the outer diameter of the cylindrical part is integrally provided via a rear partition wall of the joint,
An intermediate pushing device, wherein the cylindrical portion of the T-shaped intermediate pusher tube is inserted into a steel collar of the S-shaped intermediate pusher tube via a rubber ring for the T-shaped intermediate pusher tube so as to be extendable and contractible.   2. The rib structure of a T-shaped intermediate pusher pipe is provided with a storage portion in which ribs are erected at intervals capable of storing a hydraulic jack, and concrete is filled between ribs other than the storage portion. Medium press device described.   2. The intermediate pressing device according to claim 1, wherein the combination of the T-shaped intermediate pressing tube and the S-shaped intermediate pressing tube is formed to be about half the length of the standard tube. In an intermediate press device composed of a combination of a T-type intermediate press tube and an S-type intermediate press tube and a hydraulic jack,
The T-shaped intermediate pusher pipe has an outer diameter slightly smaller than the diameter of the joining collar through a partition wall provided at the tip of the joining collar in the propulsion direction, and the length in the tube axis direction is the length of the hydraulic jack and the hydraulic jack. It is formed in a length that is combined with the stroke, and a cylindrical portion is formed inside that has a plurality of storage portions of the hydraulic jack on the circumference, and radially on the inner circumference on the partition wall side. The hydraulic jack is formed in a rib structure having a ring function with standing ribs, and the hydraulic jack has its front end in the expansion / contraction direction facing the propulsion direction and the rear end is arranged on the front surface of the rib structure. Fix it to the storage part with a mounting bracket,
The S-shaped intermediate pusher pipe is provided with water blocking rubber on the outer peripheral surface, has an outer diameter smaller than the collar of the standard pipe that advances, and has a ring function in which ribs are erected radially at equal intervals on the inner circumference. It has a joint formed in the structure, and a steel collar having a diameter slightly larger than the outer diameter of the cylindrical part is integrally provided via a rear partition wall of the joint,
Using an intermediate pusher device that inserts the cylindrical portion of the T-shaped intermediate pusher tube into a steel collar of the S-shaped intermediate pusher tube via a rubber ring for the T-shaped intermediate pusher tube;
A propulsion method characterized in that curve propulsion is performed so as not to affect the natural ground by the intermediate pushing device which is about half the length of a standard pipe.

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