Drain pipe fitted with bag body

Abstract

To provide a drain pipe fitted with a bag body which can carry out the strengthening and the draining of the ground better than before and can improve the effect of work period reduction and cost reduction.SOLUTION: A drain pipe 1 fitted with a bag body comprises a pipe body 11 that extends in the direction of penetrating into the ground and a bag body 161 that is installed on the pipe body. The aforesaid pipe body, having a partition wall 12 to partition the inside of the pipe body in the radial direction, consists of compartments sectioned by the partition wall, that is, an injection pipe part 13 capable of injecting a solidification material into the aforesaid bag body and a water-collecting pipe part 14 capable of collecting water in the ground and draining. The aforesaid injection pipe part comprises an injection port 131 to fill the solidification material in the aforesaid bag body. The aforesaid water-collecting pipe part comprises a water-collecting port 141 to collect water in the ground and is arranged before the aforesaid injection pipe part along the penetration direction and / or beyond the aforesaid injection pipe part along the penetration direction.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a drainage pipe with a bag that can reinforce the ground and drain groundwater from within the ground. [Background technology]

[0002] Traditionally, earth structures that require a certain design strength have been constructed by implementing two types of measures: shear reinforcement measures against slope collapse (e.g., natural ground reinforcement earthworks) and drainage measures (e.g., drainage pipe construction methods).

[0003] For example, Patent Document 1 discloses a ground reinforcement method using a perforated steel pipe with blades, which has spiral blades and drainage holes on the outer periphery of the steel pipe body. This aims to increase the resistance to collapse and deformation of the ground by utilizing the adhesion effect based on the peripheral friction resistance between the perforated steel pipe with blades and the ground while providing the function of drainage holes.

[0004] Furthermore, Patent Document 2 discloses a ground reinforcement method in which a bag is provided at the tip of a polyethylene collection and drainage pipe, a partition member is installed at the boundary between the collection and drainage pipe and the bag member, and grout is injected into the bag member through an injection pipe that penetrates the partition member and is placed inside the collection and drainage pipe. This aims to stabilize the ground by forming an anchorage inside the ground using the bag member expanded with grout. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-056505 [Patent Document 2] Japanese Patent Application Laid-Open No. 2007-170115 Summary of the Invention [Problem to be solved by the invention]

[0006] However, the invention disclosed in the aforementioned Patent Document 1 requires the installation of large machinery and a location for that machinery to penetrate the perforated steel pipe with blades. In addition, the resistance of the perforated steel pipe with blades is provided only by the peripheral friction resistance.

[0007] Furthermore, in the invention disclosed in the aforementioned Patent Document 2, although resistance can be expected from the bag body after the grout is injected, due to its structure, compaction effects, etc., cannot be expected from the collection and drainage pipe itself. In addition, the cross-sectional area of ​​the drainage hole is small compared to the cross-sectional area of ​​the collection and drainage pipe, so when a large amount of water is to be collected and drained, there is a risk that the amount of drainage will be insufficient or that clogging will occur due to sediment, etc.

[0008] In view of the above-mentioned problems, the present invention aims to provide a drainage pipe with a bag that can reinforce and drain the ground more effectively than conventional methods, and that can improve the effectiveness of shortening construction time and reducing costs. [Means for solving the problem]

[0009] The invention related to (1) is a drainage pipe with a bag, which has a pipe body extending in the direction of penetration into the ground and a bag body attached to the pipe body, and the pipe body is provided with a partition wall that divides the inside of the pipe body in the pipe diameter direction, and is composed of an injection pipe section that can inject a solidification material into the bag body and a water collection pipe section that can collect and drain water in the ground, which are separated by the partition wall, and the injection pipe section has an injection port for filling the bag body with the solidification material, and the water collection pipe section has a water collection port for collecting water in the ground, and is characterized in that it is arranged before the penetration direction of the injection pipe section and / or at the back side of the penetration direction of the injection pipe section.

[0010] The invention related to (2) is a drainage pipe with a bag described in (1) above, characterized in that a water-permeable drainage pipe is inserted into the pipe body, penetrating the injection pipe section and the water collection pipe section in the direction of penetration of the pipe body, and a supply pipe connected to the injection pipe section and injecting the solidification material into the injection pipe section.

[0011] The invention according to (3) is the drainage pipe with bag according to (1) or (2) above, characterized in that the pipe body is provided with a plurality of the bag bodies.

[0012] The invention according to (4) is a drainage pipe with a bag body described in any one of (1) to (3) above, characterized in that the pipe body is provided with a spacer member that protrudes from the outer surface of the pipe body and is capable of separating the inner wall surface of the drilled hole from the outer surface of the pipe body.

[0013] The invention according to (5) is a drainage pipe with a bag body according to (4) above, characterized in that the spacer members are provided in plural in the insertion direction of the pipe body. [Effects of the Invention]

[0014] The drainage pipe with a bag of the present invention is provided with a partition wall that divides the inside of the pipe body in the pipe diameter direction, and is also provided with an injection pipe section that can inject a solidification material into the bag body and a water collection pipe section that can collect and drain water from the ground, both of which are separated by the partition wall. Therefore, a single pipe body can serve both as groundwater drainage and shear reinforcement. This allows for fewer holes to be drilled compared to conventional methods and eliminates the need for setup changes, thereby shortening construction time and reducing costs.

[0015] In addition, the bag body can be installed at any position in the penetration direction, and can be installed only in areas where shear reinforcement by the bag body is required, which allows for rationalization of the number of drainage pipes with bag bodies that need to be installed. [Brief explanation of the drawings]

[0016] [Figure 1] In one embodiment of the present invention, (a) is a side view of a drainage pipe with a bag inserted into the ground, and (b) is a cross-sectional view taken along the lines AA and BB in (a). [Figure 2]In one embodiment of the present invention, (a) is a side view of a drainage pipe with a bag that has been inserted into the ground and filled with solidification material, and (b) is a cross-sectional view along AA and BB in (a). [Figure 3] In another embodiment of the present invention, (a) is a side view of a drainage pipe with a bag inserted into the ground, and (b) is a cross-sectional view taken along the lines AA and BB in (a). [Figure 4] In another embodiment of the present invention, (a) is a side view of a drainage pipe with a bag that has been inserted into the ground and filled with solidification material, and (b) is a cross-sectional view taken along lines AA and BB in (a). [Figure 5] FIG. 10 is a side view illustrating an installation mode of a spacer member in another embodiment of the present invention. [Figure 6] 5A and 5B are cross-sectional views illustrating the installation mode of a spacer member in another embodiment of the present invention, where (a) is a cross-sectional view taken along line AA in FIG. 5 of a spacer member of the first embodiment, and (b) is a cross-sectional view taken along line AA in FIG. 5 of a spacer member of the second embodiment. [Figure 7] 5A and 5B are cross-sectional views illustrating the installation mode of a spacer member in another embodiment of the present invention, where (a) is a cross-sectional view taken along line BB in FIG. 5 using a spacer member of the first embodiment, and (b) is a cross-sectional view taken along line BB in FIG. 5 using a spacer member of the second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0017] Hereinafter, various embodiments of the drain pipe with a bag of the present invention will be described with reference to the drawings. Note that the drain pipe with a bag of the present invention is not necessarily limited to the various embodiments shown below.

[0018] The drainage pipe with a bag of the present invention is a drainage pipe with a bag 1 that can reinforce the ground and drain groundwater from the ground. As shown in Figure 1(a), it has a pipe body 11 that extends in the direction of penetration into the ground (the left-right direction in the figure), and a bag body 161 provided on the pipe body 11.

[0019] Figure 1(a) shows a side view of a drainage pipe 1 with a bag that is inserted into the ground from its tip 17 and fixed to the ground surface (inclined surface) with a bearing plate 15. Figure 1(b) shows a cross-sectional view of AA and a cross-sectional view of BB in Figure 1(a).

[0020] As shown in the figure, the pipe body 11 of the bag-equipped drainage pipe 1 of this embodiment is equipped with a partition 12 that divides the inside of the pipe body 11 in the pipe diameter direction, and is composed of an injection pipe section 13 that can inject a solidification material into the bag body 161, and a water collection pipe section 14 that can collect and drain water within the ground, which are separated by the partition 12.The injection pipe section 13 is equipped with an injection inlet 131 for filling the bag body 161 with a solidification material, and the water collection pipe section 14 is equipped with a water collection inlet 141 for collecting water within the ground, and is arranged in front of the injection pipe section 13 in the penetration direction (left and right direction in the figure) and / or at the back of the injection pipe section 13 in the penetration direction.

[0021] Explaining this embodiment in more detail, in the example shown in Figure 1(a), a plurality of bags 161 (two in the example shown) are provided on the pipe main body 11. The front and rear ends of each bag 161 are firmly fixed to the pipe main body 11 by ring-shaped bands to prevent leakage of the solidification material to be filled. Furthermore, water collection pipe sections 14 that can collect and drain water within the ground are arranged on the front and rear sides of the bag 161 in the penetration direction (left-right direction in the figure), and water collection ports 141 are provided as shown in the AA cross-sectional views shown in Figures 1(a) and 1(b).

[0022] 1(a) and 1(b), an injection port 131 for filling the bag body 161 with the solidification material is provided on the upper side of the injection pipe section 13. It is preferable to provide a check valve (not shown) at the injection port 131 so that the solidification material filled inside the bag body 161 does not leak from the injection port 131. Note that there are no particular limitations on the type of check valve as long as it appropriately prevents leakage of the solidification material.

[0023] In addition, in the illustrated embodiment, a water-permeable drainage pipe 142 is inserted through the pipe body 11, penetrating the injection pipe section 13 and the water collection pipe section 14 in the direction of penetration of the pipe body 11, and a supply pipe 132 is connected to the injection pipe section 13 and injects solidification material into the injection pipe section 13.

[0024] Specifically, a supply pipe 132A is connected to supply solidification material to the injection pipe section 13 on the front side in the penetration direction (left-right direction in the figure), and a supply pipe 132B is connected to supply solidification material to the injection pipe section 13 on the back side in the penetration direction (left-right direction in the figure).

[0025] That is, the supply pipe 132A and the supply pipe 132B are inserted into the pipe main body 11 and connected to the two injection pipe sections 13 separated by the partition wall 12, so that the solidification material is pressure-controlled and injected into each injection pipe section 13, and the solidification material is filled inside the bag body 161 through the injection port 131.

[0026] In addition, a check valve (not shown) may be provided between the partition 12 and the supply pipe 132, which makes it possible to apply appropriate pressure without leaking the solidification material filled in the bag body 161 or injected into the injection pipe section 13 until the solidification material solidifies.

[0027] Furthermore, in this embodiment, a material made of cement milk is used as the solidifying material, but it is not necessarily limited to such a material, and any material that solidifies with appropriate strength after being filled into the bag body 161 can be used as appropriate. Furthermore, it is preferable that the drainage pipe 1 with bag body be cast upward at a predetermined angle so as to have a downward slope relative to the ground surface (slope) so that water can be properly drained onto the ground surface (slope).

[0028] Furthermore, the permeable drainage pipe 142 that is disposed to penetrate the injection pipe section 13 and the water collection pipe section 14 in the penetration direction of the pipe body 11 can be, for example, a perforated pipe with water passage holes formed therein. Note that, if there is a possibility that the solidification material will penetrate into the injection pipe section 13 due to the type of drainage pipe 142 or the size of the water passage holes, it is preferable to take measures such as covering the drainage pipe 142 at the injection pipe section 13 or using a non-perforated pipe.

[0029] Next, Figure 2(a) shows a side view of the bag-equipped drainage pipe 1 shown in Figure 1 in which solidification material has been injected, and Figure 2(b) shows a cross-sectional view AA and a cross-sectional view BB in Figure 2(a).

[0030] As shown in the figure, the solidification material injected under pressure into the injection pipe section 13 through pressure control is filled into the inside of the bag body 161 through the injection port 131, thereby forming a plurality of bulging sections 16 as shown in the figure. On the other hand, the water collection pipe section 14 separated by the partition wall 12 is able to drain the water collected from the water collection port 141 to the ground surface through the drain pipe 142 without the solidification material penetrating, as shown in Figure 2(b).

[0031] As described above, by forming multiple bulges 16 on the pipe body 11 to create irregularities, it is possible to provide drainage measures within the ground, while also achieving a ground reinforcement effect by compacting the ground due to the expansion of the bag body 161 and increasing the pull-out resistance due to the bearing resistance of the multiple bulges 16. In particular, the embodiment shown in Fig. 2 is effective when it is desired to lower the water level in the shallow part on the front side in the penetration direction and in the deep part on the back side in the penetration direction.

[0032] 3 and 4 show another embodiment in which the water collection pipe section 14 is disposed between the injection pipe section 13 on the front side in the penetration direction and the injection pipe section 13 on the back side in the penetration direction, but the number and installation positions of the bags 161 can be set as desired. Therefore, it is only necessary to install the bags 161 in areas where reinforcement by the bulge section 16 is required, and the ground strength can be increased efficiently. In addition, since ground drainage measures and reinforcement measures can be carried out simultaneously as described above, it is possible to shorten the construction period and reduce costs.

[0033] (Another embodiment) Although one embodiment of the present invention has been described above, the bag-equipped drainage pipe of the present invention is not necessarily limited to the above-described embodiment.

[0034] For example, as shown in Figure 5, it is possible to provide a spacer member 20 on the pipe body 11 that protrudes from the outer surface of the pipe body 11 and can separate the inner wall surface of the drilled hole from the outer surface of the pipe body 11.

[0035] This makes it possible to provide a gap between the inner wall surface of the drilled hole and the outer circumferential surface of the pipe body 11, thereby effectively preventing clogging of the water collection port 141. In addition, when the solidification material is filled into the bag body 161 to form the bulging portion 16, it is also possible to effectively prevent the bulging portion from becoming eccentric with respect to the center of the pipe body 11.

[0036] Figure 6 is a cross-sectional view illustrating the installation mode of the spacer member 20, where Figure 6(a) shows a cross-sectional view of the spacer member 20 of the first embodiment taken along line AA in Figure 5, and Figure 6(b) shows a cross-sectional view of the spacer member 20 of the second embodiment taken along line AA in Figure 5.

[0037] Specifically, in the embodiment of Figure 6(a), partial protrusions are provided on the top, bottom, left and right of the pipe body 11, and in the embodiment of Figure 6(b), ring-shaped protrusions are provided on the outer peripheral surface of the pipe body 11.

[0038] 7(a) is a cross-sectional view taken along line BB in FIG. 5 of the spacer member 20 of the first embodiment, and FIG. 7(b) is a cross-sectional view taken along line BB in FIG. 5 of the spacer member 20 of the second embodiment.

[0039] As can be seen from Figure 5, the BB cross section is located at the tip 17. Therefore, unlike the embodiment of Figure 6, by installing a spacer member 20 in a cross shape as shown in Figure 7(a) or a disk shape as shown in Figure 7(b) and making the ends and outer peripheral ends of these spacer members 20 protrude from the outer peripheral surface of the pipe body 11, it is possible to provide a gap between the inner wall surface of the drilled hole and the outer peripheral surface of the pipe body 11.

[0040] 1 to 4, in the above-described embodiment, injection port 131 is provided at the top of injection tube portion 13, but this is not necessarily limited to this, and the opening position and number of injection ports 131 can be changed. In addition, the bag body 161 used in the present invention is made of rubber, and its material is not particularly limited.

[0041] Although one embodiment and another embodiment have been described above, the scope of the present invention is defined by the claims rather than the description of each embodiment above, and further includes all modifications within the meaning and scope of the claims. Furthermore, the specific materials, dimensions, shapes, etc. described in the above embodiments can be modified within the scope of solving the problems of the present invention. [Explanation of symbols]

[0042] 1 Drainage pipe with bag 11 Tube body 12 Bulkhead 13 Injection pipe section 131 Inlet 132 Supply pipe 14 Water collection pipe section 141 Water collection outlet 142 Drain pipe 15 Bearing plate 16 Bulge 161 Bag body 17 Tip 18 Rear end 20 Spacer member

Claims

1. A drainage pipe with a bag body having a pipe body extending in the direction of penetration into the ground and a bag body provided on the pipe body, The pipe body is provided with a partition wall that divides the inside of the pipe body in the pipe diameter direction, and is composed of an injection pipe section that can inject a solidification material into the bag body and a water collection pipe section that can collect water in the ground and drain it, which are partitioned by the partition wall, the injection pipe section has an injection port for filling the bag body with a solidifying material, The water collection pipe section has a water collection port that collects water in the ground, and is arranged before the injection pipe section in the penetration direction and / or on the back side of the injection pipe section in the penetration direction. A drainage pipe with a bag.

2. A water-permeable drainage pipe is inserted into the pipe body, passing through the injection pipe section and the water collection pipe section in the direction of penetration of the pipe body, and a supply pipe is connected to the injection pipe section and injects the solidification material into the injection pipe section.

2. The bag-equipped drainage pipe according to claim 1.

3. The pipe body is provided with a plurality of the bags.

3. The bag-equipped drainage pipe according to claim 1 or 2.

4. The pipe body is provided with a spacer member that protrudes from the outer circumferential surface of the pipe body and is capable of separating the inner wall surface of the drilled hole from the outer circumferential surface of the pipe body.

3. The bag-equipped drainage pipe according to claim 1 or 2.

5. The pipe body is provided with a spacer member that protrudes from the outer circumferential surface of the pipe body and is capable of separating the inner wall surface of the drilled hole from the outer circumferential surface of the pipe body.

4. The bag-equipped drainage pipe according to claim 3.

6. The spacer members are provided in a plurality in the direction of insertion of the pipe body.

5. The bag-equipped drainage pipe according to claim 4.

7. The spacer members are provided in a plurality in the direction of insertion of the pipe body.

6. The bag-equipped drainage pipe according to claim 5.

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