JP2007170115A - Water collecting/draining pipe with restraining function - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water collecting/draining pipe with a restraining function, which stabilizes the natural ground and facilitates construction work to shorten a construction period, regarding the water collecting/draining pipe with the restraining function which combines an anchor function and a water collecting/draining function as measures to stabilize a slope and to restrain a landslide. <P>SOLUTION: The water collecting/draining pipe 1 with the restraining function has: a water collecting/draining pipe 2 with the rear end buried on the ground surface side and with the tip buried in the ground; a bag body 3 provided at the tip part of the water collecting/draining pipe; a partition member 4 disposed at a boundary between the water collecting/draining pipe and the bag body to prevent infiltration of a grout material into the water collecting/draining pipe; a grout injecting pipe 6 injecting a grout material to form an anchor part at the tip part of the water collecting/draining pipe; and a tension material 7 disposed inside the water collecting/draining pipe so that its tip part 7b is disposed at the anchor part formed on the tip part side of the pipe. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a drainage pipe with a deterrent function that has both an anchor function and a drainage function, which is used to prevent landslides such as embankments and retaining walls, to promote consolidation of soft ground or to improve soft ground in residential land development, etc. It is.

2. Description of the Related Art Conventionally, an anchor function that prevents a natural mountain, a slope, or a retaining wall from collapsing is also known (see Patent Document 1). For example, a water-impermeable inner tube is provided in a water-permeable outer tube via a gap, and a communication portion between the inner tube and the gap is provided. The outer tube and the inner tube are collected in the communication portion. A multiple pipe provided with a water joint is embedded at an elevation angle from the ground surface of a natural ground unstable part toward the natural ground stable part.
Japanese Patent Laid-Open No. 06-88335

However, the conventional collecting and drainage pipe with a deterrent function is a multiple pipe and the anchor function does not have a dedicated anchor material, so that a large support strength is not exhibited. Moreover, since there are many parts and it embeds in a drilling hole on the spot, assembling it to required length sequentially, there exists a subject that it cannot necessarily say that it is an efficient work.
The collection drainage pipe with a deterrent function according to the present invention has been proposed in order to solve such a problem.

  The gist for solving the above-mentioned problems of the collecting / draining pipe with a deterrent function according to the present invention is to collect the draining / piping pipe having a rear end portion embedded in the ground surface and a tip end portion embedded in the ground, and the collecting A bag provided at a tip of the drainage pipe, a partition member disposed at a boundary between the drainage pipe and the bag, and preventing grout material from entering the drainage pipe; and the drainage pipe The tip portion is disposed in a grout injection pipe for injecting a grout material to form a fixing portion at the tip portion of the pipe, and a fixing portion that is disposed inside the drainage pipe and is formed on the tip portion side of the pipe. A tensile material.

The grout injection pipe is disposed inside the drainage pipe and is disposed so as to pass through the partition member and reach the inside of the bag body;
The grout injection pipe passes through the bag body, the tip of the pipe reaches the back of the hole, and a bag body injection hole is separately provided in the middle of the portion passing through the bag body;
In the fixing portion, a drainage pipe is disposed at the tip of the bag body, a grout injection pipe is disposed outside the drainage pipe, and a tip portion of the tensile material is disposed inside the drainage pipe. The gap between the drainage pipe and the tensile material is filled with a hardener;
A bag is provided at the rear end of the drainage pipe;
Is included.

According to the collecting and drainage pipe with a deterrent function of the present invention, the drainage function and anchor function of the natural ground are exhibited, and the fixing portion is formed by injecting the grout material, so that the construction is easy and the man-hour is reduced. Further, the bag body of the fixing unit is expanded by the grout material and is in close contact with the inner wall of the drilling hole, thereby forming a stable fixing unit.
In addition, the fixing portion can be formed by directly injecting a grout material into the space portion of the drilling hole and solidifying it, thereby enhancing the adhesion strength of the fixing portion. When forming this fixing part with grout material, if the grout material is injected by inserting a pre-filled drainage pipe into the bulb part and injecting the grout material, the amount of grout material used can be reduced and the construction period is shortened. Cost reduction.
Moreover, by providing a bag body at the rear end portion of the ground surface side of the collecting / draining pipe with a deterrence function, the unstable portion is sandwiched between the bag bodies at both ends, thereby contributing to the stability of the natural ground.

  As shown in FIG. 1, a collecting / draining pipe 1 with a deterrent function according to the present invention includes a collecting / draining pipe 2 in which a rear end 2 a is embedded on the ground surface side and a leading end 2 b is embedded in the ground, and the collecting / draining pipe 2. A bag body 3 provided at the front end portion 2b, a partition member 4 disposed at a boundary between the drainage pipe 2 and the bag body 3 to prevent the grout material from entering the drainage pipe, A grout injection pipe 6 for injecting a grout material to form a fixing portion 5 at the tip end portion 2 b of the drainage pipe 2, and a pipe disposed inside the drainage pipe 2 and formed at the tip end 2 b side of the pipe 2. And a tension member 7 that is provided with a tip 7a.

  The grout injection pipe 6 is disposed inside the drainage pipe 2 and is disposed so that the tip end portion 6a reaches the inside of the bag body 3 through the partition member 4. The tension member 7 is formed by coating a strand made of, for example, a PC steel wire with an outer cover made of a synthetic resin having an unbonded type. Tension is applied and the wedge 9 is fixed in a wedge manner.

  As shown in FIG. 2, the tension member 7 is fixed to a condominium (metal fixing tool) that is fixed to the rear end portion 7a of the tension member 7 and has a screw groove on the outer peripheral portion. There is also a case of a screw type that is fixed by a nut 10 to be attached.

  The fixing plate 8 is a square plate having a desired thickness, and is provided with drainage holes 8a for draining water collected by the drainage pipe 2 to the outside.

  The drainage pipe 2 is, for example, a cylindrical body made of synthetic resin such as polyethylene (made of PE), and a hole for collecting water such as ground is arbitrarily provided around the pipe. Yes. Moreover, the diameter is about 40 mm-about 90 mm. Moreover, since the total length reaches the fixing portion of the ground and can be further inserted by about 5 to 10 m, it is necessary to appropriately set the length according to the installation location.

  In that case, as shown in FIGS. 3 to 4, an intermediate connector 2c is used for the drainage pipe 2 having a certain length. As shown in FIG. 4 (B), insertion portions 2d and 2e for inserting and fixing the grout injection pipe 6 and the tensile material 7 are integrally formed in the intermediate connector 2c by a mold. Provided. Since water is collected and flows down inside the drainage pipe 2, the injection pipe 6 and the tensile material 7 are connected to the middle part or the upper part by the insertion parts 2d and 2e in order to secure the flow area. It arranges in.

  Note that the insertion portions 2d and 2e are not limited to being integrally formed with the drainage pipe 2, and the spacer 11 having the outer shape of the space portion of FIG. 4B is fixed inside the intermediate connector 2c. And the said insertion parts 2d and 2e can also be formed.

  As shown in FIG. 1A, the tip 7b of the tension member 7 is fixed by binding the tension member 7 and the bag body 3 with a binding tool 13 by an end jig 12.

  Such a collection drainage pipe 1 with a deterrent function according to the present invention is, for example, as shown in FIG. It gives light restraint to slopes and embankments, and provides drainage function to prevent liquefaction during earthquakes in embankments with high groundwater levels.

  Moreover, as shown in FIG. 6, an anchor function can be added to the water collecting pipe used for the horizontal boring work of the landslide area for the landslide area. It works with the ground anchor 14 to strengthen and assist the anchor function.

  In addition, instead of FIG. 7 (A) showing a general ground consolidation method, as shown in FIG. 7 (B), the drainage pipe 1 is driven vertically into the soft ground 15 and a pressure receiving plate is provided to provide a tensile material. A tension force is applied to 7 to promote consolidation settlement. In this case, a device (for example, a pump or the like) that sucks the water collected in the drainage pipe 2 to the ground surface is required.

  Moreover, since there is an anchor function, as shown in FIGS. 8 (A) and 8 (B), it is possible to suppress the floating of what is buried in the ground such as a manhole or an oil tank. In addition, the water collection and distribution function acts to prevent liquefaction of the ground. 8A shows the case where the water collected by the drainage pipe 2 is drained into the manhole 16, and FIG. 8B shows the case where the water is pumped up to the ground and drained. . In addition, it can be applied to piers, water purification tanks, wind power generation foundations, etc.

  In addition, for the construction of the drainage pipe 1 with a deterrence function, for example, when the elevation is set to the slope of the embankment (about 5 °), the bulb is drilled with a boring machine and expanded to the tip of the hole. Create part A. And the collection drainage pipe 1 with the suppression function which concerns on this invention is inserted in a drilling hole from the front end side which has the bag body 3, and it connects via the intermediate connector 2c according to length, the tension material 7 and grout The injection pipe 6 is also inserted while being fixed.

  The grout injection pipe 6 injects a grout material with a grout injection device. Thereby, the bag body 3 is inflated by the grout material and is in a state of being filled in the bulb portion A of the ground. Due to the partition member 4, the grout material does not enter the collection / drainage pipe 2 of the free length portion from the fixing portion 5.

  Then, after the grout material is cured and the fixing portion 5 is formed by the bag 3, the fixing plate 8 is installed on a concrete pressure receiving plate or the like on the slope of the ground surface side, and the wedge type (FIG. 1). ) Or a screw type (FIG. 2), a tension is applied to the tension member 7 with a jack to fix it. In this way, the collecting / draining pipe 1 with a restraining function according to the present invention functions as a reinforcing anchor body and as a collecting / draining pipe for natural ground.

  As shown in FIG. 9, the collecting / draining pipe 1a with a deterrent function according to another embodiment of the present invention relates to the structure of the fixing portion 5 and is directly grouted to the bulb portion A at the tip of the drilling hole. The material is injected to form a bulb part A in which the grout material is in close contact with the ground or the like.

  With the partition member 4 at the tip of the drainage pipe 2 as a boundary, the tip 6a of the grouting pipe 6 is directly projected into the bulb A of the ground, and the tip 7b of the tension member 7 is similarly a bulb. Project into part A. In the partition member 4, the bag body 3 having a short length is attached, and the tying member 13 is configured so that the grout material does not enter the collecting / draining pipe 2 side of the free length portion.

  In addition, the grout injection pipe 6 penetrates the bag body 3 to reach the tip 6a of the pipe at the back of the drilling hole, and a bag body injection hole 6b is provided in the middle of the portion passing through the bag body 3. Is provided. Thus, when the grout material is injected into the bulb portion A by the pipe 6, the grout material is also injected into the bag body 3 at the same time, and the bag body 3 expands and fills the hole.

  Thereby, it is prevented that the grout material of the bulb portion A leaks from the borehole to the ground surface side. Furthermore, there is an effect that the bulb portion A is pressurized and pressed against the natural ground. Further, the grout material injected into the bulb portion A is prevented from entering the collecting / drainage pipe 2 of the free length portion by the right side binding tool 13 in the drawing of the partition member 4.

  By the collecting and draining pipe 1a, the bulb portion A is densely formed in the ground with a grout material, and becomes a solid fixing portion.

  As shown in FIG. 10, a collecting / draining pipe 1 b with a deterrent function according to another embodiment of the present invention has a collecting / draining pipe 2 disposed at the tip of the bag body 3 in the fixing portion 5, and a grout injection pipe 6 is provided. The tip 7b of the tension member 7 is disposed inside the drainage pipe 2 and disposed inside the drainage pipe 2, and the gap between the drainage pipe 2 and the tension member 7 is, for example, The hardened material 17 made of synthetic resin is filled.

  A cylindrical end pipe 18 is provided at the tip of the collecting / draining pipe 2 in the fixing unit 5. In this way, by forming the tip end portion of the drainage pipe 1b as a fixing portion in advance, less grout material is injected into the bulb portion A after being inserted into the drilling hole. Therefore, the construction period for installing this collection / drainage pipe 1b with a deterrence function in the natural ground can be shortened. Furthermore, the strength as the fixing unit 5 is also improved.

  As shown in FIG. 11, the collecting / draining pipe 1c with a restraining function according to another embodiment of the present invention is provided with a bag body 3a on the rear end 2a side of the collecting / draining pipe 1c. By filling the bag body 3a with a grout material, it is fixed at both ends of the collecting / draining pipe 1c with a restraining function, and loosening of unstable parts such as embankment can be restrained instead of the pressure receiving plate.

It is the front view (A), side view (B), and sectional view (C) along the XX line of the collection drainage pipe 1 with a deterrent function according to the present invention. The fixing member on the ground surface side of the tension member 7 is a partial half sectional view (A) and a side view (B) when the fixing member is a screw type. In the collection drainage pipe 1 with the suppression function of the present invention, it is a half sectional view showing a state in which the length is extended to the collection drainage pipe 2 by an intermediate connector 2c. It is the judgment surface view (A) of the intermediate | middle connector 2c, and sectional drawing (B) along the YY line. It is explanatory drawing of the usage example of the collection drainage pipe 1 with the suppression function which concerns on this invention. It is explanatory drawing of the usage example of the collection drainage pipe 1 with the suppression function which concerns on the same this invention. It is explanatory drawing (A) which shows the improvement construction method of the soft ground by the conventional embankment and sand pile, and explanatory drawing (B) which shows the improvement construction method using the collection drainage pipe 1 with a suppression function of this invention. It is explanatory drawing (A), (B) of the example which used the collection drainage pipe 1 with a suppression function of this invention for the lift prevention of a manhole. They are a half sectional view (A) and a side view (B) of a collection drainage pipe with a deterrent function according to another embodiment. They are a semi-sectional view (A) and a side view (B) of a collection drainage pipe with a deterrent function according to another embodiment. They are a semi-sectional view (A) and a side view (B) of a collection drainage pipe with a deterrent function according to another embodiment.

Explanation of symbols

1,1a, 1b, 1c Collection drain pipe with deterrent function,
2 water collecting pipe,
2a rear end,
2b tip,
2c intermediate connector,
2d, 2e insertion part,
3,3a bag,
4 partition members,
5 Fixing part,
6 Grout injection pipe,
6a tip,
6b injection hole for bag,
7 Tensile material,
7a rear end,
7b tip,
8 Fixing plate,
8a drainage hole,
9 Wedge,
10 nuts,
11 spacer,
12 end jig,
13 Tying tool,
14 Ground anchor,
15 Soft ground,
16 Manhole,
17 Curing material.

Claims (5)

A drainage pipe whose rear end is on the ground surface side and whose front end is embedded in the ground; and
A bag provided at the rear end of the drainage pipe;
A partition member disposed at the boundary between the drainage pipe and the bag body to prevent the grout material from entering the drainage pipe,
A grout injection pipe for injecting a grout material to form a fixing part at the tip of the drainage pipe;
A tension member disposed inside the collecting and draining pipe and having a distal end disposed at a fixing portion formed on the distal end side of the pipe;
Drainage pipe with a deterrent function characterized by The grout injection pipe is disposed inside the drainage pipe and disposed so as to penetrate the partition member and reach the tip of the bag body,
The drainage pipe with a deterrent function according to claim 1. The grout injection pipe penetrates the bag body, the tip of the pipe reaches the back of the drilling hole, and a bag body injection hole is separately provided in the middle of the portion passing through the bag body,
The drainage pipe with a deterrent function according to claim 1. In the fixing unit, a drainage pipe is disposed at the tip of the bag body, a grout injection pipe is disposed outside the drainage pipe, and a tip portion of the tensile material is disposed in the drainage pipe. The gap between the drainage pipe and the tensile material is filled with a hardener,
The drainage pipe with a deterring function according to claim 3. A bag is provided at the rear end of the drainage pipe;
The collection drainage pipe with a deterrent function according to any one of claims 1 to 4.

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