Water stop device

Abstract

To improve a method of filling underground structures in situations where groundwater flows in.SOLUTION: A water stop device 10 connected to an end of a filling pipe PF stored in an underground structure B in a situation where underground water flows into an internal space comprises: a first hollow member 11 which is installed at a drainage side end of the filling pipe PF; a first insertion portion which is connected to the first hollow member 11 and allows a string-like object to be movably inserted into the first hollow member; a hose attaching portion 15 which is connected to the first hollow member 11 in a branching state from the first insertion portion 13, and to which a first drainage hose D1 receiving drain water passing through the first hollow member can be attached; a second hollow member 12 which is installed at the end of the filling pipe PF substantially parallel to the first hollow member 11; a second insertion portion 14 which is connected to the second hollow member 12, and allows a string-like object to be movably inserted into the second hollow member 12; and a water stop portion 16 which stops water by crimping the first hollow member 11 and the second hollow member 12 to the end of the filling pipe PF.SELECTED DRAWING: Figure 11

Description

Technical Field

[0001] The present invention relates to a water stop device and a water stop and filling method.

Background Art

[0002] Conventionally, a pipeline for accommodating communication cables has been buried underground and connects manholes. In soft ground, special sections, etc., in order to ensure reliability, the pipeline may be protected by underground buried objects such as fume pipes. The inside of the underground buried object is hollow. The inside of the underground buried object is filled with a filler to achieve the perpetuation of the equipment. As a method for this, it is disclosed that a hole is drilled in a pipeline penetrating the underground buried object by a dedicated machine, and mortar is filled into the inside of the underground buried object through the pipeline (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When there is a deteriorated part in the underground buried object, groundwater, earth and sand, etc. are drawn into and flow into the inside of the underground buried object, and there is a risk of the road surface sinking on the ground surface in the area where the underground buried object is embedded. Therefore, a technology that enables the filling of the filler into the inside of the underground buried object while performing water stop without allowing the groundwater flowing into the inside of the underground buried object to flow out has been desired. Furthermore, during hole drilling in the pipeline, etc., cable operation of each device necessary for work inside the pipeline is possible, and a technology that replaces the accumulated water and the filler inside the underground buried object without increasing the internal pressure of the underground buried object during filling has been desired. Thus, a technology for improving the method of filling an underground buried object in a situation where groundwater flows in has been desired.

[0005] In view of such circumstances, an object of the present invention is to improve a method for filling underground buried objects in a situation where groundwater flows in.

Means for Solving the Problems

[0006] In order to solve the above problems, a water stop device according to the present invention is a water stop device connected to an end of a filling pipeline accommodated in an underground buried object in a situation where groundwater flows into an internal space as accumulated water, and includes: a first hollow member installed at the drainage side end of the filling pipeline; a first insertion portion connected to the first hollow member and allowing a string-like object to be movably inserted into the first hollow member; a hose attachment portion connected to the first hollow member and branched from the first insertion portion, and capable of attaching a first drainage hose for receiving drainage passing through the first hollow member; a second hollow member installed substantially parallel to the first hollow member at the end of the filling pipeline; a second insertion portion connected to the second hollow member and allowing a string-like object to be movably inserted into the second hollow member; and a water stop portion for crimping and water stopping the first hollow member and the second hollow member at the end of the filling pipeline.

[0007] In addition, the water stop and filling method according to the present invention is a water stop and filling method for a buried object in the ground in a situation where groundwater flows into an internal space as accumulated water, and the filling material is filled into the buried object in the ground through a filling pipeline connected to the buried object. The method includes the steps of: installing a water stop device at the drainage side end of the filling pipeline; drilling, with a drilling machine, into the filling pipeline, injection holes for injecting the filling material, drainage holes for draining the accumulated water from the inside of the buried object, and drainage auxiliary holes for a drainage auxiliary pipe for entering the internal space of the buried object and draining the accumulated water; installing an in-pipeline water stop plug between the injection holes and the drainage holes; installing a filling water stop plug capable of injecting the filling material at the filling side end of the filling pipeline; installing the drainage auxiliary pipe through the drainage auxiliary holes; injecting the filling material into the internal space of the buried object through the filling water stop plug and the injection holes in a state where water is stopped by the water stop device and the filling water stop plug, and performing drainage from the drainage holes and the drainage auxiliary pipe through the water stop device to replace the accumulated water with the filling material.

Effects of the Invention

[0008] According to the present invention, the method of filling a buried object in the ground in a situation where groundwater flows in can be improved.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9A

Figure 9B

Figure 10

Figure 11

Figure 12

Embodiments for Carrying Out the Invention

[0010] Hereinafter, embodiments of the present disclosure will be described with appropriate reference to the drawings. In the following description, "up" and "down" mean directions parallel to the Z-axis of the coordinate axis display drawn in the drawings, and "horizontal" means a direction parallel to the XY plane of the coordinate axis display drawn in the drawings. In each drawing, the same or corresponding parts are denoted by the same reference numerals. In the description of the present embodiment, the description of the same or corresponding parts will be omitted or simplified as appropriate. The embodiments described below are examples of the configuration of the present disclosure, and the present disclosure is not limited to the following embodiments.

[0011] FIG. 1 is a cross-sectional view schematically showing an underground area having a water stop device 10 according to the present embodiment. As shown in FIG. 1, a pipeline P1, a pipeline P2, and a filling pipeline PF connect between a manhole M1 and a manhole M2. In the present embodiment, the end of the filling pipeline PF on the manhole M1 side is also referred to as the filling side end, and the end on the manhole M2 side is also referred to as the drainage side end. In FIG. 1, only three pipelines in total, namely the pipeline P1, the pipeline P2, and the filling pipeline PF, are shown, but it is not limited thereto. Each pipeline can be any pipeline such as a water supply pipeline, a gas pipeline, or an electric power pipeline.

[0012] The pipeline P1, the pipeline P2, and the filling pipeline PF are housed inside the underground buried object B and penetrate the underground buried object B in the longitudinal direction. In the present embodiment, the pipeline P1, the pipeline P2, the filling pipeline PF, and the underground buried object B are buried at a position lower than the groundwater level. In the present embodiment, there is a deteriorated portion of the underground buried object B at the portion indicated by the black arrow in FIG. 1, and groundwater has flowed into the inside of the underground buried object B as accumulated water. The inflowed groundwater flows toward both ends of the manhole M1 and the manhole M2 as shown by the broken-line arrow in FIG. 1. By the water stop device 10 and the water stop and filling method according to the present embodiment, a filler is filled from the filling side end in the direction indicated by the white arrow in FIG. 1 through an injection hole h1 described below, and the internal space of the underground buried object B can be filled.

[0013] FIG. 2 is a diagram for explaining the water stop device 10 and the water stop and filling method according to the present embodiment, and shows the pipeline P1 and the pipeline P2 omitted. As shown simplified in FIG. 2, the water stop device 10 according to the present embodiment is installed at the drainage side end of the filling pipeline PF. A filling water stop plug 20 described below is installed at the filling side end of the filling pipeline PF. At least two drilling holes h are provided in the filling pipeline PF, and an in-pipeline water stop plug is installed inside the filling pipeline PF between the drilling holes h.

[0014] In FIG. 2, one of the bored holes h is provided as an injection hole h1 described below, and one is provided as a drainage hole h2 described below. According to the present embodiment, as shown by the white arrow in FIG. 2, the filling material is injected from the filling-side end through the injection hole h1. The accumulated water inside the buried object B flows out through the drainage hole h2 as shown by the broken-line arrow, but by using the water stop device 10, it is possible to prevent a large amount of water from flowing out to the drainage-side end. Although the accumulated water inside the buried object B may also flow in the direction of the injection hole h1, it is stopped by the filling water stop plug 20 and can be prevented from flowing out to the filling-side end. Thus, according to the present embodiment, the internal space of the buried object B can be filled with the filling material without allowing a large amount of groundwater to flow out, and the accumulated water inside the buried object B and the filling material can be smoothly replaced.

[0015] Referring to FIGS. 3 to 9B, the configuration of the water stop device 10 in the present embodiment will be described. FIG. 3 is a transparent view of a configuration example of the water stop device 10 as viewed from above. FIG. 4 is a cross-sectional view of a configuration example of the water stop device 10 as viewed from the side. FIG. 5 is a transparent view of a configuration example of the water stop device 10 as viewed from the drainage-side end of the filling pipeline PF. FIG. 6 is a view of a configuration example of the water stop device 10 as viewed from the side. FIG. 7 is a view of a configuration example of the water stop device 10 as viewed from the drainage-side end of the filling pipeline PF. FIG. 8 is a view of a configuration example of the water stop device 10 as viewed from the filling-side end of the filling pipeline PF. FIGS. 9A and 9B are diagrams for explaining the state in which the drainage auxiliary pipe 50 is installed in the filling pipeline PF and drainage is performed.

[0016] The water stop device 10 includes a first hollow member 11, a second hollow member 12, a first insertion portion 13, a second insertion portion 14, a hose attachment portion 15, and a water stop portion 16. The first hollow member 11, the second hollow member 12, the first insertion portion 13, the second insertion portion 14, and the hose attachment portion 15 may all be made of any metal, alloy, synthetic resin material such as vinyl chloride, polyethylene, polypropylene, ABS (acrylonitrile-butadiene rubber-styrene), or a combination thereof.

[0017] The first hollow member 11 is installed at the drainage-side end of the filling pipeline PF. As shown in FIGS. 3 and 4, the first hollow member 11 has a length along the axial direction (Y-axis direction) of the filling pipeline PF so that it can be inserted and installed inside the filling pipeline PF. The first hollow member 11 allows accumulated water from the filling pipeline PF to pass through. The first hollow member 11 can accommodate a pipe camera for photographing the inside of the filling pipeline PF. Specifically, the pipe camera has a main body portion and a cable connected to the main body portion. The main body portion is accommodated in the first hollow member 11, and the cable is gripped and inserted through a first insertion portion 13 described below.

[0018] As shown in FIG. 8, the cross-section of the first hollow member 11 has a semi-circular shape along the inner circumference of the filling pipeline PF. In FIG. 8, the two-dot chain line portion indicates the circumference of the filling pipeline PF. The arc portion of the semi-circular shape of the first hollow member 11 is in close contact with the inner circumference of the filling pipeline PF, preventing a gap from forming between the first hollow member 11 and the filling pipeline PF and enabling water stoppage. Also, due to the cross-section of the first hollow member 11 being semi-circular, accumulated water can pass along the side of the pipe camera accommodated inside the first hollow member 11.

[0019] The second hollow member 12 is installed substantially parallel to the first hollow member 11 at the drainage-side end of the filling pipeline PF, as shown in FIG. 4. Similar to the first hollow member 11, the second hollow member 12 also has a length along the axial direction (Y-axis direction) of the filling pipeline PF so that it can be inserted and installed inside the filling pipeline PF. In this embodiment, the second hollow member 12 is installed in the vertical direction (Z-axis direction) along the first hollow member 11. However, it is not limited to this, and the second hollow member 12 may be installed substantially parallel to the first hollow member 11 in the left-right direction along the horizontal direction (X-axis direction) with respect to the first hollow member 11, or obliquely with a different vertical height from the first hollow member 11. As shown in FIGS. 6 and 8, the second hollow member 12 may be provided with a non-woven fabric on the side of the filling pipeline PF. The non-woven fabric can reduce the water discharge when an air pipe connected to a drainage auxiliary pipe 50 described below is inserted into the second hollow member 12.

[0020] In the second hollow member 12, a drainage auxiliary pipe 50 that enters the internal space of the underground buried object B and drains accumulated water is inserted. As shown in FIG. 9A, one end of the drainage auxiliary pipe 50 is installed above the internal space of the underground buried object B in the vertical direction (Z-axis direction) to drain the accumulated water in the upper region. FIG. 9B is a diagram showing the drainage auxiliary pipe 50 in a simplified manner. The accumulated water inside the underground buried object B is taken in from one end of the drainage auxiliary pipe 50 indicated by the white arrow in FIG. 9B. The other end of the drainage auxiliary pipe 50 indicated by the star in FIG. 9B is inserted into the second hollow member 12, and the accumulated water that has entered the drainage side end of the filling pipeline PF can come out by passing through the second insertion portion 14. The other end of the drainage auxiliary pipe 50 may be held by the upper and lower parts of the half-cut structure of the second insertion portion 14 described below so that the accumulated water can come out.

[0021] A second drainage hose D2 that receives drainage from the drainage auxiliary pipe 50 can be attached to the other end of the drainage auxiliary pipe 50. The second drainage hose D2, together with the first drainage hose D1 described below, enables water stoppage via the water stop device 10.

[0022] The first insertion portion 13 is connected to the first hollow member 11 and allows a string-like object to be movably inserted into the first hollow member 11. The second insertion portion 14 is connected to the second hollow member 12 and allows a string-like object to be movably inserted into the second hollow member 12. In the present embodiment, the first insertion portion 13 inserts, as a string-like object, a cable of a pipe camera that is inserted into the first hollow member 11 and photographs the inside of the filling pipeline PF. The second insertion portion 14 inserts, as a string-like object, a towing rope of a hole drilling machine 40 inserted into the filling pipeline PF and an air hose that inserts air into a water stop ball 30 inserted into the filling pipeline PF. The second insertion portion 14 may insert, instead of or in addition to the towing rope of the hole drilling machine 40 and the air hose of the water stop ball 30, a towing rope of the water stop ball 30. Not limited to this, the first insertion portion 13 and the second insertion portion 14 may insert cables of any device used for inspecting and investigating the inside of the filling pipeline PF and the internal space of the underground buried object B, such as a water quality sensor.

[0023] Each of the first insertion part 13 and the second insertion part 14 has a split structure, and the split structure grips the string-like object. In FIG. 4, the first insertion part 13 shows a first upper part 131 and a first lower part 132 divided by the split structure, and the second insertion part 14 shows a second upper part 141 and a second lower part 142 divided by the split structure. In FIG. 4, it shows the state where the first upper part 131 and the first lower part 132 of the first insertion part 13 are integrally connected by the first screw part 133, but by turning the first screw part 133, the first upper part 131 can be disengaged upward in the vertical direction (Z-axis direction). Similarly, the second upper part 141 and the second lower part 142 of the second insertion part 14 are also integrally connected by the second screw part 143 as shown in FIG. 4, but by turning the second screw part 143, the second lower part 142 can be disengaged downward in the vertical direction (Z-axis direction). In FIG. 6, it shows the state where the first upper part 131 of the first insertion part 13 and the second lower part 142 of the second insertion part 14 are removed. The split structure of the first insertion part 13 and the second insertion part 14 is not limited to this. For example, it may be a structure in which each of the first insertion part 13 and the second insertion part 14 can grip the string-like object by a coupling mechanism using a spring.

[0024] Referring to FIG. 7, the string-like object inserted into the first insertion part 13 can come out from the place indicated by the star mark, and the string-like object inserted into the second insertion part 14 can come out from the places indicated by the two triangle marks. Each of the first upper part 131 and the first lower part 132 of the first insertion part 13, and the second upper part 141 and the second lower part 142 of the second insertion part 14 can grip the string-like object by compressing it from above and below. Thereby, it is possible to prevent the accumulated water that has entered from the first hollow material 11 and the second hollow material 12 from leaking. A non-woven fabric may be provided between the first upper part 131 and the first lower part 132, and the second upper part 141 and the second lower part 142. Thereby, it becomes possible to stop the water more reliably.

[0025] The second insertion portion 14 may be capable of attaching a second drain hose D2 that receives drainage from the drain auxiliary pipe 50. The second insertion portion 14 and the second drain hose D2 may be connected via an arbitrary connecting member. The two-dot chain line portion in FIG. 7 indicates the portion to which the second drain hose D2 is attached. By closely attaching the second drain hose D2 to the circumferential surface of the second insertion portion 14, drainage can come out to the end on the drainage side without leakage.

[0026] The hose attachment portion 15 can be attached to the first hollow member 11 and branched from the first insertion portion 13 to receive the first drain hose D1 that receives drainage passing through the first hollow member 11. As shown in FIG. 5, the first drain hose D1 can be fitted and attached to the opening of the hose attachment portion 15. The hose attachment portion 15 may have a joint portion that enables fitting of the first drain hose D1 as shown in FIG. 4. The joint portion may be made of an arbitrary material such as metal or alloy.

[0027] FIG. 9A shows a state in which the first drain hose D1 and the second drain hose D2 are connected via the water stop device 10. The first drain hose D1 and the second drain hose D2 receive drainage via the water stop device 10 and are lifted to the height of the groundwater level in the direction indicated by the white arrow in FIG. 9A. Thereby, while preventing an increase in the internal pressure of the underground buried object B accompanying the filling of the filler, it is possible to stop the accumulated water to be drained. By being able to connect drain hoses separately to the hose attachment portion 15 and the second insertion portion 14, smoother drainage is possible compared to the case where it is attached only to one side.

[0028] The water stop part 16 presses and bonds the first hollow material 11 and the second hollow material 12 to the end of the filling pipeline PF to stop the water. The water stop part 16 includes a rubber 161 and a non-woven fabric 162 shown in FIG. 6. The non-woven fabric 162 is provided so as to surround the first hollow material 11 and the second hollow material 12 together. The rubber 161 may be configured to advance and retreat in the radial direction of the filling pipeline PF by turning a screw (not shown) so that it can be pressure-bonded to the inner surface of the filling pipeline PF. For example, the rubber 161 may expand outward in the radial direction by being compressed in the axial direction of the filling pipeline PF and be pressure-bonded to the inner surface of the filling pipeline PF. In FIG. 6, the rubber 161 of the water stop part 16 is provided along the circumferential direction of the second hollow material 12, but the configuration of the rubber 161 is not limited to this, and it may be provided so as to surround the first hollow material 11 and the second hollow material 12 in the same manner as the non-woven fabric 162. Since adjustment is possible with the rubber 161 and the non-woven fabric 162, it is possible to surely stop the water against the filling pipeline PF made of any material such as vinyl chloride or metal. With the water stop part 16, the water stop device 10 can be fixed and installed on the filling pipeline PF.

[0029] Referring to FIGS. 9A, 9B, 10, 11, and 12, the procedure of the water stop and filling method for the underground buried object B according to an embodiment will be described. In this embodiment, the groundwater flows into the internal space of the underground buried object B as accumulated water.

[0030] In step S1, the water stop device 10 is installed at the end of the drainage side of the filling pipeline PF. In this embodiment, the filling pipeline PF is accommodated in the underground buried object B, and the end of the drainage side of the filling pipeline PF is connected to the manhole M2. The water stop device 10 may be installed by a worker who has entered the manhole M2.

[0031] The first hollow material 11 and the second hollow material 12 of the water stop device 10 are inserted into the end of the filling pipeline PF, and the rubber 161 included in the water stop part 16 is pressure-bonded to the filling pipeline PF. Thereby, while stopping the water of the filling pipeline PF, the water stop device 10 can be fixed to the end of the filling pipeline PF. In this way, the water stop device 10 is installed on the filling pipeline PF.

[0032] In step S2, a drilling machine 40 drills an injection hole h1 for injecting a filling material, a drainage hole h2 for draining accumulated water from inside the underground buried object B, and a drainage auxiliary pipe hole h3 for a drainage auxiliary pipe 50 that enters the internal space of the underground buried object B and drains the accumulated water, into the filling pipe PF. As shown in FIG. 11, the injection hole h1 is provided in the direction of the filling side end of the filling pipe PF, and the drainage hole h2 and the drainage auxiliary pipe hole h3 are provided in the direction of the drainage side end. Thereby, the internal space of the filling pipe PF can be divided into a filling use and a drainage use by using a pipeline internal water stop plug described below, and filling and drainage operations can be performed. The drilling hole h including the injection hole h1, the drainage hole h2, and the drainage auxiliary pipe hole h3 penetrates from the inner wall of the filling pipe PF into the internal space of the underground buried object B. The number of each of the injection hole h1, the drainage hole h2, and the drainage auxiliary pipe hole h3 may be freely determined. In FIG. 11, the injection hole h1, the drainage hole h2, and the hole for the drainage auxiliary pipe 50 are provided upward along the vertical direction (Z-axis direction) of the filling pipe PF, but the present invention is not limited to this, and they may be provided in any direction.

[0033] Any method may be adopted for drilling. For example, as shown in FIG. 11, a drilling machine 40 equipped with a drill may be inserted into the filling pipe PF and moved, and the inner surface of the filling pipe PF may be drilled by the drill at a desired position. The drilling machine 40 may be moved by being pulled by an attached towing rope. In this case, the towing rope is movably inserted through the second hollow material 12 of the water stop device 10 and into the second insertion portion 14. Thereby, the towing rope can be pulled from the manhole M2 on the drainage side, and the drilling machine 40 can be moved to a desired position. The present invention is not limited to this, and the drilling machine 40 may also be moved by being pushed into the filling pipe PF from the manhole M1 on the filling side by a push rod. After the drilling is completed, the drilling machine 40 is recovered.

[0034] The situation of the drilling of the filling pipeline PF can be visually confirmed by a pipe camera that photographs the inside of the filling pipeline PF. The pipe camera may be installed inside the first hollow member 11 of the water stop device 10 by an operator from the manhole M2 on the drainage side. The pipe camera is equipped with a cable for camera communication and for pulling the camera. The cable may be movably inserted into the first insertion portion 13 of the water stop device 10 and come out of the manhole M2 on the drainage side.

[0035] For drilling by the drilling machine 40, a water stop ball 30 may be used. The drilling machine 40 and the water stop ball 30 are connected by a wire. By means of the towing rope of the drilling machine 40, the drilling machine 40 and the water stop ball 30 can be pulled in from the drainage side end and pulled back from the filling side end. Here, pulling in means moving the drilling machine 40 and the water stop ball 30 in the direction of the drainage side end, and pulling back means moving them in the direction of the filling side end.

[0036] Specifically, first, by pulling the towing rope from the drainage side end, the drilling machine 40 and the water stop ball 30 are pulled into the filling pipeline PF. The drilling machine 40 is pulled to the drilling position of the first drilling hole and the drilling hole is made. The first drilling hole becomes, for example, the hole h3 for the drainage auxiliary pipe in FIG. 11. Since accumulated water flows into the filling pipeline PF from the first drilling hole, while stopping the water with the water stop ball 30, the drilling machine 40 and the water stop ball 30 are pulled back. At this time, maintenance of the drilling machine 40 that has been pulled back once can be performed inside the manhole M1. Subsequently, while the accumulated water inside the filling pipeline PF is stopped with the water stop ball 30, the drilling machine 40 is pulled to the drilling position of the second drilling hole and the drilling hole is made. The second drilling hole becomes, for example, the drainage hole h2 in FIG. 11. Similar to the first drilling hole, while stopping the water with the water stop ball 30, the drilling machine 40 and the water stop ball 30 are pulled back. At this time, similar to the case of the first drilling hole, maintenance of the drilling machine 40 may be performed inside the manhole M1.

[0037] Thus, the water stop ball 30 is used to stop the accumulated water flowing into the filling pipeline PF from the drilled hole. For example, after the drilling machine 40 drills the hole h3 for the drainage auxiliary pipe and the two drainage holes h2 in FIG. 11, when the water stop ball 30 is at the position indicated by the dashed line, it is possible to prevent the accumulated water flowing in from the two drilled holes from flowing to the filling side end.

[0038] The towing rope of the drilling machine 40 may be movably inserted through the second hollow member 12 of the water stop device 10 and into the second insertion portion 14. The water stop ball 30 is made of a material that can be inflated by air such as rubber. An air hose is connected to the water stop ball 30, and air is sent into the water stop ball 30 through the air hose. The air may be sent in by a manual or electric pump. After being installed at the desired position, the water stop ball 30 expands by sending air through the air hose to stop water inside the filling pipeline PF.

[0039] As shown in step S2, the water stop device 10 movably inserts the cable of the pipe camera for photographing the inside of the filling pipeline PF, the towing rope of the drilling machine 40, and the air hose for inserting air into the water stop ball 30.

[0040] In step S3, an in-pipeline water stop plug is installed between the injection hole h1 and the drainage hole h2. As shown in FIG. 9A, the in-pipeline water stop plug may be installed between the injection hole h1 and the drainage hole h2. Thereby, the in-pipeline water stop plug can separate the injection part of the filling material and the drainage part of the accumulated water inside the filling pipeline PF.

[0041] In step S4, a filling water stop plug 20 capable of injecting a filling material is installed at the filling side end of the filling pipeline PF. The filling water stop plug 20 can connect a filling hose through which the filling material is fed to the filling pipeline PF, and can fill the gap between the filling water stop plug 20 and the filling pipeline PF to stop water. As shown in FIG. 12, the filling water stop plug 20 may include a rubber part that crimps along the inner circumference of the filling pipeline PF. In the filling water stop plug 20, the rubber part may be configured to move forward and backward in the radial direction of the filling pipeline PF by turning a screw (not shown) so as to be crimped to the inner surface of the filling pipeline PF. Thereby, the filling operation can be performed without the filling material or the drainage water flowing out through the injection hole h1 shown by the dashed arrow in FIG. 11 flowing into the manhole M1 on the filling side.

[0042] In step S5, a drainage auxiliary pipe 50 is installed through the drainage auxiliary pipe hole h3. The drainage auxiliary pipe 50 may be, for example, a CD (Combined Duct) pipe having a diameter of 14 mm. Without being limited thereto, the drainage auxiliary pipe 50 may be composed of any diameter and any material capable of draining water through the drainage auxiliary pipe hole h3. The end of the drainage auxiliary pipe 50 on the side for taking in drainage is installed on the upper side along the vertical direction (Z-axis direction) of the internal space of the underground buried object B as shown in FIGS. 9A and 9B.

[0043] The other end of the drainage auxiliary pipe 50 can pass through the second hollow member 12 of the water stop device 10 and send drainage into the second insertion portion 14. In this case, the drainage may come out through the second insertion portion 14 through the gap formed by pulling out the towing rope of the hole drilling machine 40, the water stop ball 30, or the air hose of the water stop ball 30 inserted into the second insertion portion 14. The other end of the drainage auxiliary pipe 50 itself may be gripped by the half-cut structure of the second insertion portion 14 and the drainage can be discharged to the manhole M2 side. Since the drainage auxiliary pipe 50 can drain the accumulated water from the upper part in the vertical direction of the underground buried object B, even if the first hollow member 11 and the second hollow member 12 of the water stop device 10 are blocked by the filling material after the filling pipeline PF is filled with the filling material, drainage is still possible. The installation status of the drainage auxiliary pipe 50 may be performed while visually checking with a pipe camera.

[0044] In step S6, a first drainage hose D1 for receiving drainage from the drainage hole h2 and a second drainage hose D2 for receiving drainage from the drainage auxiliary pipe 50 are attached, and the first drainage hose D1 and the second drainage hose D2 are pulled up to the height of the groundwater level to stop the water. Here, the first drainage hose may be attached to the hose attachment portion 15 of the water stop device 10, and the second drainage hose may be attached to the other end of the drainage auxiliary pipe 50 indicated by the star mark in FIG. 9B. The pulling up to the height of the groundwater level may be performed manually or by using a machine. The water stop method is not limited to this, and it may be performed by attaching a water stop cap to the end portion on the opposite side of the filling pipe PF of the first drainage hose D1 and the second drainage hose D2. Thereby, it is possible to prevent a large amount of accumulated water inside the buried object B that comes out during filling from overflowing outside.

[0045] In step S7, a filler is injected into the internal space of the buried object B through the filling water stop plug 20 and the injection hole h1. The filler is water-insoluble mortar in this embodiment. The filler may be Cool Smoothie (registered trademark). The filler is sent into the filling hose by a pump attached to the filling water stop plug 20 and injected into the inside of the filling pipe PF. The filler enters the internal space of the buried object B through the injection hole h1 as shown by the white arrow in FIG. 11. Also, the accumulated water inside the buried object B enters the first hollow member 11 of the water stop device 10 through the drainage hole h2 of the filling pipe PF as shown by the broken-line arrow in FIG. 11 and exits to the first drainage hose D1. At this time, drainage may also be performed simultaneously from the drainage auxiliary pipe 50.

[0046] When the injection of the filler progresses and the filling pipe PF is also filled with the filler, drainage is performed from the drainage auxiliary pipe 50 installed through the drainage auxiliary pipe hole h3 as shown in FIG. 9A. Thereby, the drainage of the accumulated water that has flowed into the inside of the buried object B continues. By providing two drainage hoses through the water stop device 10 in this way, at the start of filling, a large amount of drainage can be ensured by passing through the first hollow member 11 with a large drainage diameter, and drainage can continue even after the filling pipe PF is filled with the filler, and as a result, the filling speed can be increased.

[0047] In step S8, it is determined whether the internal space of the underground buried object B has been filled with the filling material. If it is determined that the filling is not completed (step S8: NO), the procedure returns to step S7. Any method may be adopted to determine that the internal space of the underground buried object B has been filled with the filling material. For example, if the second drain hose D2 is configured to be transparent, it may be determined that the filling is completed when it is visually confirmed that the drain water flowing out through the drain auxiliary pipe 50 has changed to the filling material. For example, when the volume of the underground buried object B can be grasped in advance, it may be determined that the filling is completed when the injection of the filling material for the volume is finished. When the filling is completed, the first drain hose D1 and the second drain hose D2 may be removed from the water stop device 10, and the drain water can be received in an arbitrary container. Thereby, the replacement between the filling material and the accumulated water can be safely performed without allowing a large amount of drain water to flow out. When it is determined that the filling is completed in this way (step S8: YES), the process of the flowchart in FIG. 10 is terminated.

[0048] As shown in steps S6 and S7, with the water stopped by the water stop device 10 and the filling water stop plug 20, the filling material is injected into the internal space of the underground buried object B through the filling water stop plug 20 and the injection hole h1, and the drain water from the drain hole h2 and the drain water from the drain auxiliary pipe 50 are discharged through the water stop device 10 to replace the accumulated water with the filling material.

[0049] As shown from step S1 to step S7, the filling material is filled through the filling pipeline PF connected to the underground buried object B.

[0050] As described above, the water stop device 10 of the present embodiment is a water stop device 10 connected to the end of a filling pipeline PF housed in a buried object B underground in a situation where groundwater flows into the internal space as accumulated water. The water stop device 10 includes a first hollow member 11 installed at the drainage side end of the filling pipeline PF, a first insertion portion 13 connected to the first hollow member 11 and allowing a string-like object to be movably inserted into the first hollow member 11, a hose attachment portion 15 connected to the first hollow member 11 and branched from the first insertion portion 13 and to which a first drainage hose D1 for receiving drainage passing through the first hollow member 11 can be attached, a second hollow member 12 installed substantially parallel to the first hollow member 11 at the end of the filling pipeline PF, a second insertion portion 14 connected to the second hollow member 12 and allowing a string-like object to be movably inserted into the second hollow member 12, and a water stop portion 16 that crimps the first hollow member 11 and the second hollow member 12 to the end of the filling pipeline PF to stop water.

[0051] According to the water stop device 10 of the present embodiment, when filling the buried object B underground in a situation where groundwater flows in, appropriate water stop can be performed while preventing an increase in the internal pressure of the buried object B underground. Therefore, it is possible to safely fill the buried object B underground with a filling material without allowing a large amount of groundwater to flow out. In addition, the accumulated water and the filling material in the buried object B underground can be appropriately replaced. Thus, according to the present embodiment, a technique for improving the method of filling a buried object underground in a situation where groundwater flows in can be provided.

[0052] As described above, in the water stop device 10 of the present embodiment, each of the first insertion portion 13 and the second insertion portion 14 has a split structure, and the string-like object is gripped by the split structure.

[0053] According to the water stop device 10 of the present embodiment, the operation of equipment necessary for work inside the filling pipeline PF becomes simpler, and the replacement of the accumulated water and the filling material in the buried object B underground can be performed more accurately and efficiently. Therefore, the method of filling a buried object underground in a situation where groundwater flows in can be improved.

[0054] As described above, in the water stop device 10 of the present embodiment, a drainage auxiliary pipe 50 that enters the internal space of the underground buried object B and drains accumulated water is inserted into the second hollow member 12, and a second drainage hose D2 is attached to the other end of the drainage auxiliary pipe 50.

[0055] In the water stop device 10 of the present embodiment, separate drainage ports are provided for drainage through the first hollow member 11 and the hose attachment portion 15, and drainage through the second hollow member 12 and the second insertion portion 14. By using the drainage auxiliary pipe 50 and the second drainage hose D2, as the filling operation progresses, the inside of the filling pipeline PF is filled with the filling material, and drainage is possible even if the water stop device 10 is blocked. In this way, a large amount of drainage is ensured through the hose attachment portion 15 and the first drainage hose D1 from the start of filling until the filling pipeline PF is filled with the filling material, and drainage can be performed through the drainage auxiliary pipe 50 and the second drainage hose D2 after the filling pipeline PF is filled with the filling material. That is, the replacement of the accumulated water and the filling material can be smoothly performed in stages according to the progress of filling. Therefore, the method of filling underground buried objects in a situation where groundwater flows in can be improved.

[0056] As described above, in the water stop device 10 of the present embodiment, the first insertion portion 13 is inserted into the first hollow member 11 as a string-like object to insert the cable of a pipe camera that photographs the inside of the filling pipeline PF, and the second insertion portion 14 is inserted into the filling pipeline PF as a string-like object to insert the towing rope of the hole drilling machine 40 inserted into the inside of the filling pipeline PF and the air hose that inserts air into the water stop ball 30 inserted into the inside of the filling pipeline PF.

[0057] According to the water stop device 10 of the present embodiment, the insertion ports for the cable of the pipe camera that improves the efficiency of the operation of the filling pipeline PF, the towing rope of the hole drilling machine 40, and the air hose of the water stop ball 30 are independent. Thereby, it is possible to work more accurately while confirming the hole drilling situation of the hole drilling machine 40, the situation of installing the water stop ball 30, and the situation of inserting the drainage auxiliary pipe 50 into the drainage auxiliary pipe hole h3 from the drilled hole with a pipe camera. Therefore, the method of filling underground buried objects in a situation where groundwater flows in can be improved.

[0058] As described above, in the water stop device 10 of the present embodiment, the cross section of the first hollow member 11 has a semi-circular shape along the inner circumference of the filling pipe PF.

[0059] According to the water stop device 10 of the present embodiment, the water stop device 10 adheres to the filling pipe PF, water stop is more reliably performed, and it becomes easier to exchange the filling material and the accumulated water with respect to the underground buried object B. Therefore, it is possible to improve the method of filling the underground buried object in a situation where groundwater flows in.

[0060] Although the present invention has been described based on the drawings and embodiments, it should be noted that those skilled in the art can easily make various modifications and corrections based on the present invention. Therefore, it should be noted that these modifications and corrections are included in the scope of the present invention.

Explanation of reference numerals

[0061] 10 Water stop device 11 First hollow member 12 Second hollow member 13 First insertion part 14 Second insertion part 15 Hose attachment part 16 Water stop part 20 Filling water stop plug 30 Water stop ball 40 Hole drilling machine 50 Drainage auxiliary pipe 131 First upper part 132 First lower part 133 First screw part 141 Second upper part 142 Second lower part 143 Second screw part 161 Rubber 162 Non-woven fabric

Claims

1. A water stop device connected to the end of a filling pipeline housed in a buried object underground when groundwater flows into the internal space as accumulated water, a first hollow member installed at the drainage side end of the filling pipeline, a first insertion part connected to the first hollow member and allowing a string-like object to be movably inserted into the first hollow member, a hose attachment part connected to the first hollow member by branching off from the first insertion part and allowing a first drainage hose for receiving drainage passing through the first hollow member to be attached, a second hollow member installed substantially parallel to the first hollow member at the end of the filling pipeline, a second insertion part connected to the second hollow member and allowing a string-like object to be movably inserted into the second hollow member, and a water stop part for crimping and water stopping the first hollow member and the second hollow member at the end of the filling pipeline. A water stop device.

2. Each of the first insertion part and the second insertion part has a split structure, and the string-like object is gripped by the split structure. The water stop device according to Claim 1.

3. A drainage auxiliary pipe for entering the internal space of the buried object underground and draining the accumulated water is inserted into the second hollow member, and a second drainage hose for receiving drainage from the drainage auxiliary pipe can be attached to the drainage auxiliary pipe. The water stop device according to Claim 1 or 2.

4. The first insertion part allows, as the string-like object, a cable of a pipe camera inserted into the first hollow member to photograph the inside of the filling pipeline to be inserted, and the second insertion part allows, as the string-like object, a towing rope of a hole drilling machine inserted into the filling pipeline and an air hose for inserting air into a water stop ball inserted into the filling pipeline to be inserted. The water stop device according to Claim 1 or 2.

5. The cross section of the first hollow member has a semi-circular shape along the inner circumference of the filling pipeline. The water stop device according to Claim 1 or 2.

Images