JP2001132380A - Stabilizing device for buried pipe body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid troubles such that a burying pipe body like a concrete pipe constituting a vertical shaft is raised on the ground or inclined by vibration applied to the ground and to stably bury it in the ground. SOLUTION: This stabilizing device is constituted of pipe bodies 1, 2 buried in the ground and a prescribed number of stabilizing plates 8, and the stabilizing plates 8 are fixed to the pipe bodies 1, 2 with the stabilizing bodies 8 pushed out into the external ground 5 from the inside of a horizontal slit 9 provided in the pipe bodies 1, 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stabilizer for stabilizing a concrete shaft, a steel pipe or the like which is press-fitted into the ground with a surrounding ground when a shaft is constructed in the ground. It is.

[0002]

2. Description of the Related Art When constructing manholes or other shafts in the ground, concrete pipes or steel pipes are press-fitted while being rocked or rotated in the circumferential direction by a submerging machine, and are sequentially inserted into the upper part. There is known a method in which the earth and sand inside is buried while being buried while being combined with each other to form a predetermined shaft.

[0003] The shaft constructed by the above-described construction method has a small frictional resistance between the tube and the ground when the tube constituting the shaft is buried in the ground of a gravel layer or a groundwater layer. When vibrations are applied, they may be pushed out to the ground. When the pipe is pressed into the ground as described above, the pipe is inclined due to low frictional resistance,
They may rise due to groundwater.

In order to solve such a problem, it is conceivable to provide a large number of convex portions on the outer peripheral surface of the pipe body.

Therefore, according to the present invention, a small press-fit is required when the pipe is press-fitted, the posture can be easily corrected during the press-fit or after the press-fit, and the pipe is integrated with the surrounding ground with a large frictional resistance after the press-fit. It is another object of the present invention to provide a stabilizing device for preventing a tubular body from being pushed to the ground, levitating, tilting, and the like.

[0006]

In order to solve the above-mentioned problems, a stabilizing device for a buried pipe according to the present invention comprises a pipe buried in the ground and a required number of stabilizers. The stabilizer is fixed to the buried pipe in a state where the stabilizer is pushed into the outside ground from inside a horizontal slit provided in the buried pipe.

[0007] According to the above configuration, the press-fitting resistance does not increase by removing the stabilizer when the pipe is pressed. Also, after the press-fitting, when the stabilizer is pushed out from the inside of the tube to the outside and the stabilizer is fixed to the buried tube,
Since the buried pipe and the ground are integrated, a large frictional resistance is obtained, and the buried pipe is stabilized.

[0008] A sheet-like closing packing for closing the slit is mounted inside the slit so that the closing packing is broken when the stabilizing plate is extruded. Between the buried pipe of
When a seal packing for sealing between the above-mentioned stabilizer and the slit is interposed, and a cut corresponding to the width of the above-mentioned stabilizer is provided in the above-mentioned seal, the infiltration of groundwater into the pipe body is achieved. Can be prevented.

In addition, the closing packing and the sealing packing are overlapped, and they are fixed to the inner surface of the buried pipe by a packing pressing member. Make a hole,
It is possible to adopt a configuration in which the packing holding member is provided with a means for fixing the stabilizer, and it is also possible to adopt a configuration in which the buried pipe is either a concrete pipe or a steel pipe.

In the case where the buried pipe is made of a concrete pipe, a recess is formed by recessing the slit from the inner wall surface of the concrete pipe, and the stabilizer is pushed out and fixed to the buried pipe. After that, a configuration in which the concave portion is filled with concrete may be adopted.

[0011]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIGS. 1 to 4 show a first embodiment, in which a required number of upper pipes 2 are sequentially added on a tip pipe 1 made of a concrete pipe to construct a shaft such as a manhole. The tip tube 1 is provided with a cutting edge 4 at the lower end of the kuncrete tube 3, and the upper tube 2 is integrally provided with a cylindrical reinforcing steel plate 6 on the outer peripheral surface of a concrete tube 3 '.

The stabilizing device 7 is provided on all the pipes 1 and 2 depending on the condition of the surrounding ground 5, or is provided only on a part thereof, for example, only on the uppermost upper pipe 2. FIG.
4 to 4 show the stabilizer 7 provided on the upper tube 2. This stabilizer 7 is composed of the upper tube 2 and the stabilizer 8.

The inner peripheral surface of the upper tube 2 is provided with four recesses 10 at equal intervals in the circumferential direction.
Has the same length as the horizontal slit 9 (FIG. 3).
(See (b)) is provided penetrating the concrete pipe 3 ′ and the reinforcing steel plate 6 inward and outward. Above and below the slit 9, a required number of female screw insert members 11 are embedded in the inner surface of the concrete pipe 3 '(see FIG. 2A).

On the inner surface of the concrete pipe 3 ', a sheet-like closing packing 12 and a sealing packing 13 are provided so that the slit 9 is closed from the inside, with the sealing packing 13 facing the concrete pipe 3'. Two sheets are stacked. Further, a packing holding member 14 is applied from the inside of the closing packing 12, and the fixing bolt 15 penetrating the packing holding member 14 and the two packings 12 and 13 is fastened to the female screw insert member 11. A peripheral packing 16 is interposed between the outer peripheral edge of the packing pressing member 14 and the inner peripheral surface of the concrete pipe 3 ′. The fastening of the fixing bolt 15 causes the peripheral packing 16 to be compressed, thereby applying a tightening force to the two packings 12 and 13, and sealing the peripheral edge of the packing holding member 14 in the concave portion 10.

The above-mentioned closing gasket 12 completely closes the slit 9 in a normal state, and prevents intrusion of groundwater from outside. The seal packing 13 is provided with a cut 17 having the same length as the slit 9 in a portion facing the slit 9. In addition, packing holding member 1
4 is provided with a slit-like insertion port 18 having the same length as the slit 9 at a position facing the slit 9 (see FIG. 4). As described later, the closing packing 12 is selected from a material or a thickness that is broken when the stabilizer 8 is pushed in from the inside.

The above-mentioned stabilizer 8 is formed of a steel plate and is usually in a state of being separated from the upper tubular body 2 (FIG. 2A).
reference). The upper pipe 2 is ground 5 with the stabilizer 8 separated.
Even if groundwater intrudes through the slit 9 and further through the cut 17 of the sealing packing 13, the groundwater is blocked by the closing packing 12. In addition, these two packings 12,
Infiltration of groundwater from around 13 is prevented by peripheral packing 16.

After the upper tube 2 is pressed into a predetermined depth,
The stabilizing plate 8 is inserted from the inside thereof through the insertion opening 17 of the packing member 14, the chuck 25 of the jack 19 is fitted to the rear end thereof, and the pin 26 is inserted and connected.
When the other end of the jack 19 is pressed against the inner surface on the opposite side of the upper tubular body 2 to operate it (see the arrow a in FIG. 2B),
The stabilizer plate 8 breaks the closing packing 12 at its tip, pushes open the notch 17 of the sealing packing 13, and is pushed out of the slit 9 into the ground 5. At this time, the peripheral portion of the cut 17 that has been pushed open becomes a seal lip 21 and is pushed into the inner wall surfaces of the stabilizer 8 and the slit 9 to seal intrusion of groundwater.

In FIG. 2B, reference numeral 22 denotes a guide jig which is detachably attached to the packing holding member 14 to guide the stabilizer 8.

As described above, the stabilizer 8 is attached to the surrounding ground 5.
When the pressing is completed, as shown in FIG. 3A, a welding 23 as a fixing means is applied between the rear end of the stabilizer 8 and the packing holding member 14. As shown in FIG. 3B, the extrusion and welding of the stabilizer 8 are performed by four guide devices 7 at four locations.
It is performed in. Thereby, the upper pipe body 2 is integrated with the ground 5 with a large frictional force and is stabilized. In addition, concrete 27 is filled in the recess 10 and the concrete pipe 3 ′
In order to prevent the strength from being lowered, the fixing bolt 15, the packing holding member 14, etc. are rustproofed.

When the upper tube 2 is inclined during the press-fitting, as shown in FIG. 5, the stabilizer 8 of the stabilizer 7 on the inclined wall surface is pushed into the ground 5 in the above-described manner. . When the stabilizer 8 reaches the hard ground, the reaction force of the pressing force of the jack 19 acts on the opposite surface of the upper tube 2. Thereby, the posture of the upper tube 2 is corrected. After the posture is corrected, the jack 9 is operated in the opposite direction (see the arrow b in FIG. 2B).
And then press-fit again. When the posture is corrected after the press-fitting is completed, it is not necessary to pull back the stabilizer 8.

When there is no groundwater layer on the ground 5, as shown in FIG. 6 (a), the closing and sealing packings 12 and 13 and the packing holding member 14 are omitted, and the upper pipe 2 is removed. The fixing plate 24 is attached to the inner surface of the base plate with the fixing bolt 15. Then, the stabilizing plate 8 is inserted through the insertion port 18.
Is inserted into the ground 5 through the slit 9, and the rear end of the stabilizer 8 is fixed to the fixing plate 24 by welding 23.

If there is some concern about the presence of groundwater,
As shown in FIG. 6 (b), the same closing packing 12 as described above may be interposed between the packing holding member 14 'and the upper tube 2. When the stabilizer plate 8 breaks and penetrates the closing packing 12, a part of the broken portion is
1 ′, and a seal between the stabilizer 8 and the slit 9 is achieved. When the influence of the groundwater is small, the above-mentioned sealing packing 13 may be used instead of the closing packing 12.

In the above embodiment, the stabilizer 7 is connected to the upper tube 2.
Although the case where it is provided is described, the case where it is provided in the distal end tube 1 is configured in exactly the same way.

Next, a second embodiment shown in FIGS. 7 to 9 is a case where a pipe made of a steel pipe 25 is buried. In this case, only the configuration of the tube is different from that described above, and the configuration and operation of the stabilizing device 7 are the same. I do.

[0025]

As described above, the stabilizing device for a buried pipe according to the present invention requires only a small press-fit when it is pressed into the ground, and after the press-fitting, the stabilizer is extruded from the inside of the pipe to the surrounding ground. By fixing the stabilizer to the pipe, the buried pipe and the ground are integrated. As a result, since the buried pipe is stable, it is possible to prevent the buried pipe from being pushed out of the ground, inclined, or raised by the groundwater layer even if vibration such as an earthquake is applied after the completion of the press-fitting. it can.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a first embodiment.

FIG. 2 (a) is a partial cross-sectional view before the same as before, and (b) is a partial cross-sectional view during the same when the stabilizer is inserted.

FIG. 3A is a partial cross-sectional view after the same stabilizer is inserted. FIG. 3B is a plan view after the same stabilizer is inserted.

FIG. 4 is a partially exploded perspective view of the same.

FIG. 5 is a cross-sectional view of the inclination correction method according to the first embodiment.

6A is a partial cross-sectional view of a modified example, and FIG. 6B is a partial cross-sectional view of another modified example.

FIG. 7 is a sectional view of the second embodiment.

FIG. 8 (a) is a partial cross-sectional view before the same as before, and (b) is a partial cross-sectional view during the insertion of the same.

FIG. 9A is a partial cross-sectional view after the same stabilizer is inserted. FIG. 9B is a plan view after the same stabilizer is inserted.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tip pipe 2 Upper pipe 3, 3 'concrete pipe 4 Blade 5 Ground 6 Reinforced steel plate 7 Stabilizer 8 Stabilizer 9 Slit 10 Recessed part 11 Female screw insert member 12 Closure packing 13 Seal packing 14, 14' packing Pressing member 15 Fixing bolt 16 Peripheral packing 17 Notch 18 Insertion port 19 Jack 21, 21 'Seal lip 22 Guide jig 23 Welding 24 Fixing plate 25 Chuck portion 26 Pin 27 Concrete

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Jin Kitamura 1-7-10 Higashi Okino, Yokaichi City Heiwa Okuda Co., Ltd. (72) Inventor Tsuyoshi Miyahara 961 Toendo, Aojikawa-cho, Aichi-gun, Shiga Prefecture Kurimoto Concrete Industry Co., Ltd.

Claims (6)

[Claims] The present invention comprises a tube buried in the ground and a required number of stabilizers, and the stabilizer is extruded into the outside ground from inside a horizontal slit provided in the buried pipe. An apparatus for stabilizing a buried pipe, wherein the stabilizer is fixed to the buried pipe in a state. 2. The buried pipe according to claim 1, wherein a sheet-like closing packing for closing the slit is mounted inside the slit, and the closing packing is broken when the stabilizer is pushed out. Body stabilizer. 3. A sealing gasket for sealing between said stabilizing plate and said slit is interposed between said closing gasket and said buried pipe, and said stabilizing plate is provided in said sealing gasket. The stabilizing device for a buried pipe according to claim 2, wherein a notch corresponding to the width of the pipe is provided. 4. The sealing gasket and the sealing gasket are overlapped with each other, and they are fixed to the inner surface of the buried pipe by a gasket pressing member. 4. A stabilizing device for a buried pipe according to claim 3, wherein a hole is provided, and said packing holding member is provided with means for fixing said stabilizer. 5. The buried pipe stabilizing device according to claim 1, wherein the buried pipe is either a concrete pipe or a steel pipe. 6. The buried pipe body is formed of a concrete pipe, and the slit is provided with a recessed portion recessed from an inner wall surface of the concrete pipe, and after the stabilizer is extruded and fixed to the buried pipe body, 6. The stabilizing device for a buried pipe according to claim 1, wherein the recess is filled with concrete.