JP5043759B2 - Investigation hole and solidifying material injection device and method of ground investigation and solidification material injection to a structure in which the inspection hole and solidification material injection device is installed - Google Patents

Description

  The present invention relates to a ground investigation and solidification material injecting apparatus for investigating the condition of the ground in contact with a structure and injecting a solidification material into a weak part such as a cavity formed from the boundary between the ground and the structure.

  In addition to underground structures such as locks and tunnels, many structures are built against the ground. In the ground, there are cases where cavities are formed from the boundary with the structure, and this cavities cause the settlement of the structure or the ground. Therefore, the cavities are found and solidified materials such as grout are injected into the cavities. It is necessary to prevent the sinking of things.

  As a device for discovering a cavity and injecting a solidified material into the cavity, there is an investigation and underground opening / closing device for an underground structure composed of a lower vertical tube and a closing unit accommodated in the lower vertical tube (see Patent Document 1). ). The seal ring inserted into the vertical cylinder of the closing unit is deformed so that the outer diameter is expanded by being pressed against the closing plate arranged at the lower part of the seal ring by tightening the tightening bolt. It is strongly pressed against the inner peripheral surface of the.

  In this case, the seal ring is restored and deformed by loosening the tightening bolts, and the pressure contact between the seal ring and the vertical pipe is released. Therefore, it is possible to loosen the tightening bolt and extract the closing unit, and to investigate the situation under the bottom plate of the structure through the lower vertical pipe. When the cavity is confirmed by investigating the condition of the ground, for example, a grout hose is inserted into the lower vertical pipe and the solidified material is injected into the cavity.

  Further, as an apparatus for discovering other cavities and injecting a solidified material into the cavities, for example, an outer cylinder and an inner cylinder that can move along the inner wall of the outer cylinder are formed. There is a measurement and grout injection device for ground subsidence under a bottom plate connected by stretching an elastic tubular body (see Patent Document 2).

  The inner cylinder is provided with a settlement detection rod, and when a cavity is formed under the bottom plate of the structure, the settlement detection rod descends together with the inner cylinder. Therefore, it is understood that a cavity is formed under the bottom plate of the structure by confirming the lowering of the inner cylinder inside the structure. Therefore, after confirming the lowering of the inner cylinder, the grout cap of the inner cylinder is removed. Insert an injection hose through the mouth and inject grout into the cavity.

Japanese Utility Model Publication No. 6-26613 JP 2001-295261 A

  As described above, in the apparatus of Patent Document 1, since the gap between the vertical tube and the vertical tube is blocked by the seal ring, the infiltration of earth and sand into the vertical tube is prevented until the tightening bolt is relaxed. Therefore, it is not necessary to perform removal work such as earth and sand when confirming the situation under the bottom plate of the structure, so that the confirmation work can be performed quickly.

  Also in the apparatus of Patent Document 2, since the gap between the outer cylinder and the inner cylinder is blocked by the stretchable cylindrical body, no ejection of earth or sand or groundwater from the outer cylinder occurs during the measurement of settlement. Furthermore, since sand and the like do not enter the gap between the outer cylinder and the inner cylinder, the removal work and the like are omitted, and no labor is required.

  However, in the apparatus of Patent Document 1 and the apparatus of Patent Document 2, if the groundwater level has reached the position above the bottom plate of the structure, the groundwater or earth and sand at the time of injecting the solidifying material (even during the confirmation work for Patent Document 1) Since it is impossible to prevent the ejection of the solidified material, there is a risk in the solidification material injection work. Specifically, in Patent Document 1, when the tightening bolt is loosened and the contact between the vertical pipe and the seal ring is released, groundwater or the like is ejected. In Patent Document 2, when the grout cap of the inner cylinder is removed. Groundwater etc. erupt.

  An object of the present invention has been made in view of such a problem, and is to provide a survey hole and solidifying material injecting apparatus capable of safely injecting a solidifying material by detecting ejection of groundwater or the like.

The invention of claim 1 is a survey hole and solidifying material injecting device installed in a portion of a structure that separates the ground and the space, the tubular body communicating the ground and the space, and the cylinder And a water stop device provided with a female member that is installed in the cylindrical body and closes the inside of the cylindrical body, and the female member has a communication hole that allows the ground and the space to communicate with each other. A water stop valve that shuts off the communication hole is provided, and a male member that is paired with the female member is connected to the female member, thereby releasing the shutoff of the communication hole by the water stop valve. It is characterized by.
The space here is a place located on the opposite side of the ground through the structure, for example, an open place such as the inside of the structure or the ground.
The inside of the cylindrical body communicates the ground and the space, but is closed by the water stop device, so that the ground and the space do not communicate with the water stop device installed in the cylindrical body. Therefore, even if the water level reaches a higher position than the survey hole / solidification material injection device, the structure is stopped by the investigation hole / solidification material injection device.
Moreover, although the communicating hole of the female member provided in the water stop device also connects the ground and the space, the ground and the space are not in communication because they are blocked by the water stop valve. However, when the male member paired with the female member is connected to the female member, the ground hole and the space communicate with each other because the blocking of the communication hole by the water stop valve is released. That is, by connecting the female member to the male member and integrating it with the male member, it becomes possible to measure the groundwater pressure, discharge the groundwater, and inject the solidified material into the ground. Here, for the female member and the male member, for example, a commercially available pair of joining members such as a plug and socket type coupler is applied.
Therefore, it is possible to measure the water pressure acting on the female member by installing the pressure gauge in which the male member is mounted on the female member on the female member from the space side.
In addition, by installing a discharge pipe, such as a hose, to which the male member is attached, on the female member from the space side, it is possible to discharge pressure by discharging the groundwater.
Furthermore, it is possible to inject the solidified material into the ground by installing the female member from the side of the supply pipe space for injecting the solidified material, to which the male member is similarly attached.
Thus, the investigation hole and solidifying material injection device is in a state where a pressure gauge, a drain pipe, and a solidifying material supply pipe can be installed.
What a male member is attached to is not limited to a pressure gauge, a drain pipe, and a solidifying material supply pipe, and is appropriately selected according to a desired purpose and function.
The water stop device may be detachable (Claim 2). In this case, the water stop device can be removed after the above-described pressure release, and the condition of the ground can be checked safely through the tubular body. In addition, as described above, the male member can be equipped with a pressure gauge, a drain pipe and a solidification material supply pipe, but in general, the diameter of the connecting portion of the pressure gauge with the male member, and the supply pipe Since the diameter of the connecting portion with the male member is different, it is difficult to attach the same male member to each other. Therefore, by removing the water stop device, the solidified material can be injected into the ground using an appropriate solidified material supply pipe.
The solidified material injection device is installed in the cylindrical body and closes the inside of the cylindrical body, and the solidified material injection device includes a connection member for connecting the solidified material injection device and the solidification material supply pipe. The connecting member may be formed with an inlet for communicating the ground and the space (claim 3).
Since the water stop device can be detached, it is possible to install the water stop device and the solidifying material injection device separately for each process. Since the female member is provided in the water stop device and the connecting member is provided in the solidifying material injection device, the standard of the female member is adapted to the standard of the appropriate pressure gauge, and the standard of the connecting member is set to the appropriate supply pipe. Can be adapted. Moreover, since the solidification material injection device closes the inside of the cylindrical body, the solidification material can be press-fitted.
The water stop device may be installed inside the cylindrical body (claim 4). Therefore, since the water stop device can be completely inserted and installed inside the tubular body in a state where the tubular body is embedded in the structure, the water stop device causes trouble to the structure (for example, It can be attached and detached without scooping the concrete around the cylindrical body. Moreover, since the water stop apparatus will not protrude from the space side surface of a structure if the water stop apparatus is completely accommodated in the inside of a cylindrical body, it will not become an obstruction at the time of construction.
A water-permeable earth and sand intrusion prevention member for preventing infiltration of ground sediment into the inside of the cylindrical body may be installed on the ground side from the water stop device in a state of closing the inside of the cylindrical body ( Claim 5). Therefore, since the inflow of earth and sand and muddy water from the ground into the cylindrical body is prevented, the communication hole of the female member is also prevented from being blocked. Further, if there is no earth and sand intrusion member, it is necessary to prevent inflow of earth and sand into the cylindrical body by the water stop device, so that the water stop device is formed to be substantially the same length as the cylindrical body and becomes large. However, since the inflow of earth and sand and the like is prevented by the earth and sand intrusion member, the water stop device does not need to be formed in substantially the same length as the cylindrical body, and can be miniaturized.
A sixth aspect of the present invention is a structure in which the inspection hole and solidifying material injecting device according to any one of the first to fifth aspects is installed. In this case, it has the same operation and effect as the first to fifth aspects.
According to a seventh aspect of the present invention, there is provided an installation step of installing the investigation hole and solidifying material injecting device according to any one of the first to fifth aspects in a structure, and the male member is provided with the male member. A ground survey and solidification material injection method, comprising: a pressure measurement step of installing a pressure gauge to measure pressure; and a solidification material injection step of injecting a solidification material into the ground. In this case, it has the same operation and effect as the first to fifth aspects.
After the pressure measuring step, there may be a pressure releasing step of installing and draining a drain pipe with the male member attached to the female member (Claim 8). Therefore, groundwater in the ground is discharged and depressurized.

  As described above, the present invention has a cylindrical body that allows the ground and space to communicate with each other, and a water stop device that closes the inside of the cylindrical body, and the ground member and the space are provided on the female member provided in the water stop device. A communication hole for communication is formed, a water stop valve for blocking the communication hole is provided, and a male member paired with the female member is connected to the female member so that the communication hole is blocked by the water stop valve. Since it is cancelled | released, solidification material injection | pouring can be safely performed by detecting ejection of groundwater etc.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(Embodiment 1)
First, the investigation hole and solidifying material injection device 1A of the present invention used when investigating the condition of the ground in contact with the back surface of the structure, and then solidified to a weak point such as a cavity formed from the boundary between the ground and the structure. The changed form 1B of the investigation hole and solidifying material injection device 1A of the present invention used when injecting the material will be described.

  FIGS. 1A to 1C show an example of a survey hole and solidifying material injection device 1A of the present invention used when investigating the situation of the ground 3 abutting against the back surface 2a of the structure 2. FIG. The back surface 2a of the structure 2 refers to a surface in any direction such as an upper side, a lower side, and a side that contacts the ground 3 of the structure 2. Here, the back surface 2 a faces the ground 3, and the front surface 2 b faces the space 4 such as an open place such as the inside of the structure 2.

  As shown in FIG. 2, for example, the structure 2 includes a main body 2 </ b> A of the structure 2 and a leveled concrete 2 </ b> B. A plurality of investigation hole and solidifying material injection devices 1A are installed on the bottom plate 2Aa and the side wall 2Ab of the lock gate, which is the main body 2A of the structure 2. In this embodiment, Xiamen will be described as an example of the main body 2A of the structure 2, but the main body 2A of the structure 2 in which the investigation hole and solidifying material injection device 1A of the present invention is installed is Xiamen. It is not limited, Other structures, for example, underground structures, such as a tunnel and a common ditch, may be sufficient.

  The main body 2A of the structure 2 on which the survey hole / solidifying material injecting apparatus 1A is installed does not need to be buried underground, but may be in contact with the ground 3. It installs in the part or member which touches, ie, the part which divides the ground 3 and the space 4. Moreover, the structure 2 does not necessarily need to be provided with the leveled concrete 2B.

  As shown in FIG. 1 (b), one end surface of the investigation hole and solidifying material injecting device 1 </ b> A faces the ground 3, and the other end surface faces the space 4. When the survey hole and solidifying material injecting apparatus 1A is installed on the bottom plate 2Aa of the structure 2, it is desirable that the both end surfaces of the survey hole and solidifying material injecting apparatus 1A coincide with the both end surfaces of the bottom plate 2Aa. The length L1 of the survey hole / solidifying material injection device 1A is changed according to the arrangement location. Therefore, the length L1 of the survey hole / solidifying material injection device 1A is equal to the thickness t1 of the portion or member of the structure 2 (the bottom plate 2Aa of the lock gate (structure 2) in the present embodiment) on which it is installed. It is preferable to match.

  As shown in FIGS. 1A to 1C, a survey hole and solidifying material injecting apparatus 1A includes, for example, a steel tubular body 10, a water stop device 11 attached to the inside of the tubular body 10, and a sediment intrusion. From the boundary between the structure 2 and the ground 3, the prevention member 12, the water-expandable member 13 fixed to the outer surface of the tubular body 10, the lid body 14 fitted into the space-side end of the tubular body 10 And a settlement measurement body 15 for detecting a weak point portion such as a cavity to be formed.

  As shown in FIGS. 3A and 3B, the cylindrical body 10 is constituted by an upper cylindrical body 16 and a lower cylindrical body 17, and the upper cylindrical body 16 and the lower cylindrical body 17 are screwed or welded. It is integrated by. The lower cylindrical body 17 is constituted by, for example, a self-supporting facilitating member 19 having a water passage 19a formed at the center thereof fixed to the other end surface of the lower cylindrical member 18 having a male thread groove 18a formed on the outer surface of one end portion thereof by welding. Has been.

  The self-supporting facilitating member 19 is formed of, for example, a circular flat plate. For example, when the concrete hole is placed to construct the bottom slab 2Aa, the self-supporting facilitating member 19 causes the tubular body 10 to be embedded by the self-supporting facilitating member 19 when the survey hole and solidifying material injection device 1A is embedded. Easily stand upright. Moreover, since the bottom surface of the self-supporting facilitating member 19 is overlapped with the upper surface of the settlement measurement body 15 described later, the settlement measurement body 15 is stabilized.

  As shown in FIGS. 1A to 1C, the water-expandable member 13 is formed, for example, in a ring shape, and is fixed to the outer surface of the lower cylindrical member 18 by, for example, adhesion over the entire circumference. For example, if a gap is formed between the structure 2 and the tubular body 10 due to a construction problem, water may leak from the structure 2, but the water-expandable member 13 may be groundwater that enters the gap. Since it expands in response to water, the air gap is blocked and water leakage is prevented.

  The earth and sand intrusion prevention member 12 is formed in a columnar shape, for example, and is fitted into the end of the lower cylindrical body 17 on the side where the self-supporting facilitating member 19 is installed, thereby closing the inside of the cylindrical body 10. The material of the earth and sand intrusion prevention member 12 is not limited as long as it has water permeability while removing unnecessary materials such as earth and sand such as filters and filter papers, and is subject to various conditions such as the particle size of the ground 3 on which the structure 2 is constructed. It suffices if it is appropriately selected. The earth and sand intrusion prevention member 12 removes unnecessary substances such as earth and sand when water such as ground water of the ground 3 enters the investigation hole and solidifying material injecting apparatus 1A. Blockage of the rod 27 and the female member 28 is prevented.

  As shown in FIGS. 3A and 3B, the upper cylindrical body 16 includes, for example, a first upper cylindrical member 20 joined to a lower cylindrical member 18 of the lower cylindrical body 17, and a first upper cylindrical member 20. The water stop device support member 21 made of, for example, a disk, which is concentrically fixed to one end surface by welding and opposite to the surface of the water stop device support member 21 that contacts the first upper cylinder member 20. A second upper cylindrical member 22 concentrically fixed to the first upper cylindrical member 20 by welding is provided on the side surface.

  The first upper cylindrical member 20 is screwed with, for example, the lower cylindrical member 18, and a female screw groove 20 a that is screwed with the male screw groove 18 a of the lower cylindrical member 18 extends over the entire inner surface of the first upper cylindrical member 20. Are molded. For example, an insertion hole 21 a having the same diameter as the inner diameter of the first upper cylindrical member 20 is formed concentrically with the first upper cylindrical member 20 in the water stop device support member 21. The inner diameter of the water stopping device support member 21 is smaller than the outer diameter of the locking member 29 described later, and the outer diameter of the water stopping device support member 21 is larger than the outer diameter of the locking member 29. Here, it is preferable that the middle of the inner periphery and the outer periphery of the water stop device support member 21 coincide with the outer periphery of the locking member 29.

  The outer diameter and inner diameter of the second upper cylindrical member 22 are both larger than the outer diameter and inner diameter of the first upper cylindrical member 20. The second upper cylindrical member 22 has one or a plurality of insertion holes 22a in the circumferential direction (two in the figure), and the insertion hole 22a has, for example, a cross-sectional shape substantially the same as the hole wall of the insertion hole 22a. A slip-out preventing member 23 having a contour is inserted and protruded from the outer surface and the inner surface of the second upper cylindrical member 22 and fixed to the outer surface of the second upper cylindrical member 22 by welding.

  The insertion hole 22a is formed such that the distance between the lower end of the insertion hole 22a and the upper surface of the water stop device support member 21 is the same as the thickness of a locking member 29 of the water stop device 11 described later. When the locking member 29 is locked to the pull-out prevention member 23, the water stop device 11 is prevented from being pulled out to the space 4 side (the upper side in the drawing).

  As shown in FIGS. 1A to 1C, the water stop device 11 is inserted into the lower cylindrical member 18 of the cylindrical body 10. As shown in FIG. 4, the water stop device 11 is in contact with, for example, a steel circular pipe member 24 and an end face (lower end face in the figure) of the circular pipe member 24 on the side inserted into the lower cylindrical member 18. The sealing member 25 that is disposed, the closing member 26 that is disposed in contact with the end surface (the lower end surface in the drawing) of the sealing member 25 that is not in contact with the circular tube member 24, and the sealing member 25 A restraining ring 25a disposed on the closing member 26, a rod 27 standing from the closing member 26 to the inside of the circular tube member 24, a female member 28 connected to the tip of the rod 27, A locking member 29 that is in contact with another end surface of the circular pipe member 24 that is fitted into the seal member 25, a tightening member 30 that is inserted through the closing member 26, the circular pipe member 24, and the locking member 29, Have

  A holding plate 24a is fixed to the end of the circular pipe member 24 on the side facing the seal member 25 (lower end in the figure) by welding, for example. A rod insertion hole 24b is formed at the center of the presser plate 24a. The rod insertion hole 24 b is formed such that its cross-sectional shape is slightly larger than the external cross section of the rod 27. In addition, a plurality of (three in the drawing) fastening member holes 24c are formed at equal intervals in the presser plate 24a so as to surround the connection hole 24b, for example.

  The seal member 25 is made of an elastic material such as rubber and has a substantially ring shape as shown in FIGS. 5A and 5B. When the seal member 25 is inserted into the lower cylindrical member 18, the seal member 25 It has a maximum outer diameter smaller than the inner diameter of the lower cylindrical member 18 so that a gap is formed between the outer surface of 25 and the inner surface of the lower cylindrical member 18. Specifically, the horizontal interval of the gap is preferably about 2 mm.

  The restraining ring 25a is made of steel, for example, and has a substantially ring shape having an outer diameter slightly smaller than the inner diameter of the sealing member 25 as shown in FIGS. 6 (a) and 6 (b). The seal member 25 has a height lower than that of the seal member 25 that does not hinder the movement of the closing member 26 that deforms.

  As shown in FIG. 4, the closing member 26 is disposed in contact with the lower surface of the seal member 25 so that the upper surface thereof faces the seal member 25. As shown in FIGS. 7A and 7B, the closing member 26 is made of, for example, a steel disk.

  Further, as shown in FIG. 4, a rod 27 is fixed to the central portion of the surface of the closing member 26 facing the seal member 25 by, for example, welding, and the closing member 26 is shown in FIGS. 7 (a) and 7 (b). A connection hole 26 b communicating with the inside of the rod 27 is formed in the. The connection hole 26 b is preferably formed so that the cross-sectional shape thereof matches the internal cross-section of the rod 27. Further, a plurality of (three in the drawing) tightening member holes 26c are formed at equal intervals in the closing member 26 so as to surround the connection hole 26b, for example.

  As shown in FIG. 4, the tightening member 30 is composed of a bolt 30a and a nut 30b of a predetermined standard. The bolt 30a is inserted into the tightening member hole 24c from the side of the closing member 26 not facing the seal member 25 (downward in the figure), and the head 30c formed at the end of the bolt 30a is welded to the closing member 26 by welding, for example. It is fixed. The bolt 30a is formed longer than the circular tube member 24, and the end opposite to the head portion 30c protrudes from the end surface of the locking member 29 placed on the end surface of the circular tube member 24 in use. At this time, it is preferable to protrude more than the thickness of the nut 30b.

  The rod 27 is connected to the closing member 26 at one end and is connected to the female member 28 at the other end. For example, a male screw groove 27a is formed on the outer surface of the rod 27 connected to the female member 28. The integrated rod 27 and female member 28 are longer than the circular tube member 24, and the integrated distal end portion of the integrated rod 27 is placed on the end surface of the circular tube member 24 and further on the end surface of the circular tube member 24. It is preferable to protrude from the end surface of the locking member 29.

  The female member 28 has a communication hole 28a formed over its entire length at the center, and a female screw groove 28b that is screwed into the male screw groove 27a of the rod 27 is formed at one end of the hole wall of the communication hole 28a. ing. A water stop valve (not shown) is provided at any location other than where the female thread groove 28b is formed in the hole wall of the communication hole 28a. The water stop valve has a function of blocking the communication hole 28a to stop fluid such as water, and a pair of male members 38 and a female screw groove 28b of the female member 28 are formed on the female member 28, which will be described later. The male member 38 has a function of releasing the blocking of the communication hole 28a when the male member 38 is fitted into the end opposite to the end. As such a female member 28, for example, a commercially available coupler, a quick joint cylinder or the like is preferably employed.

  As shown in FIGS. 8A and 8B, the locking member 29 is made of, for example, a steel disk, and has an outer diameter larger than the diameter of the insertion hole 21a of the water stop device supporting member 21 and a second one. It is formed to be smaller than the inner diameter of the upper cylindrical member 22 by several mm. On the outer edge of the locking member 29, a cutout portion 29 a having a shape into which the withdrawal prevention member 23 can be inserted is formed at a position corresponding to the withdrawal prevention member 23.

  Further, the engaging member 29 is formed with a female member hole 29b and a fastening member hole 29c having shapes corresponding to the female member 28 and the bolt 30a of the fastening member 30 in the used state. . As shown in FIG. 4, the locking member 29 is in a state where the female member 28 is inserted into the female member hole 29b and the bolt 30a of the tightening member 30 is inserted into the tightening member hole 29c. It is placed on the end face of the member 24. At this time, the locking member 29 is fastened to the circular pipe member 24 by fastening the nut 30b of the fastening member 30 and the closing member 26 fixed to the bolt 30a of the fastening member 30, and the water stop device 11 is a circular pipe. The member 24, the seal member 25, the closing member 26, and the locking member 29 are integrally formed.

  The water stop device 11 is first placed on the water stop device support member 21 of the tubular body 10 so that the cutout portion 29a of the locking member 29 and the slip-out prevention portion 23 face each other. In the direction, the cutout portion 29a and the slip-out prevention portion 23 are rotated to a position where they do not face each other. At this time, the locking member 29 is locked to the space 4 side in the axial direction of the cylindrical body 10 to the slip-out preventing member 23 and is placed on the water stop device support member 21, so that the axial direction of the cylindrical body 10 is Be bound.

  Further, when the bolt 30a and the nut 30b of the tightening member 30 are tightened, the seal member 25 is pressed against the circular tube member 24 and the closing member 26 from both axial directions of the cylindrical body 10, but the inner side is restrained by the restraining ring 25a. Since the deformation to is restricted, it is deformed so as to expand the diameter outward. For this reason, the seal member 25 is expanded outward, the maximum outer diameter of the seal member 25 is increased, the seal member 25 abuts against the inner wall of the lower cylindrical member 18, and the gap S between the seal member 25 and the lower cylindrical member 18. Disappears. Further, when the nut 30b is tightened, the seal member 25 is pressed against the inner wall of the lower cylindrical member 18, so that a frictional force is generated between the seal member 25 and the lower cylindrical body 17, and the seal member 25 is a cylindrical body. It becomes possible to resist the external force received in the 10 axial direction.

  Moreover, as shown to Fig.1 (a)-(c), the cover body 14 is inserted by the edge part by the side of the space 4 of the upper cylindrical body 16. As shown in FIG. As shown in FIGS. 9 (a) and 9 (b), a plurality of projecting portions 14a projecting outward are formed on the lid 14 so as to face each other at equal intervals in the circumferential direction (four in the figure). The distance formed by the outer ends of the projecting portions 14a, 14a facing each other, that is, the outer diameter D2 of the portion where the projecting portion 14a is formed is the second upper portion of the upper cylindrical body 16 into which the lid body 14 is fitted. It is larger than the inner diameter of the cylindrical member 22. Therefore, the lid 14 once fitted into the second upper cylindrical member 22 cannot be easily pulled out. The outer diameter D <b> 1 other than the portion where the protrusion 14 a of the lid body 14 is formed is substantially the same as the inner diameter of the second upper cylindrical body 22.

  The lid body 14 is formed with an extraction hole 14b for taking out the lid body 14. It is desirable that a plurality (two in the figure) of the extraction holes 14b are opposed to each other at equal intervals and the outer periphery is opened.

  As shown in FIGS. 1A to 1C, the settlement measuring body 15 for detecting a cavity formed in the ground 3 from the boundary between the structure 2 and the ground 3 is, for example, a shaft portion 31 and one end of the shaft portion 31. And a head part 32 connected to the part. It is desirable to insert into the lower cylindrical member 18 and the rod 27. When the cavity is formed and the settlement measurement body 15 moves to the ground 3 side, even if the shape of the cavity is irregular, the shaft portion 31 moves along the rod 27, so the settlement measurement body 15 is inclined. The amount of movement to the ground 3 side cannot be measured accurately.

  As shown in FIGS. 10 (a) and 10 (b), the shaft portion 31 is made of, for example, a steel rod-like body, while the head portion 32 is made of, for example, a steel cross-sectional U-shape, and has a bottom plate 32a and a bottom plate 32a. The side plate 32b is vertically connected to both ends of the base plate 32b. The bottom plate 32a is connected to the shaft portion 31 by welding, for example. Further, the head 32 is erected on the outside of the investigation hole and solidifying material injecting apparatus 1 and the side plate 32b is erected in the direction opposite to the direction in which the shaft portion 31 of the bottom plate 32a is erected (downward in the drawing). It is arranged. The settlement measuring body 15 is arranged so that the surface to which the shaft portion 31 of the head portion 32 is connected comes into contact with the self-supporting assisting member 19.

  Next, a modified embodiment 1B of the investigation hole and solidifying material injecting apparatus 1A of the present invention used when injecting the solidifying material into the cavity formed in the ground 3 from the boundary between the structure 2 and the ground 3 will be described. As shown in FIGS. 11A and 11B, the changed form 1B of the investigation hole and solidifying material injecting apparatus 1A includes a cylindrical body 10 and a solidifying material injecting device 33. The solidifying material injecting device 33 is connected to, for example, the first upper cylindrical member 20, and includes a backflow preventing member 34 for preventing the backflow of the solidified material and a connecting member 35 connected in communication with a transport pipe for supplying the solidified material. .

  As shown in FIGS. 12A and 12B, the backflow preventing member 34 has a first box 36 having an open outer shape and a cylindrical outer shape, and a second box having an outer shape and a rectangular parallelepiped. 37, the side plate 37b of the second box 37 is erected on the outer surface of the bottom plate 36a of the first box 36, and the first box 36 and the second box 37 are integrated. The first box 36 and the second box 37 are formed so that the side plate 37b of the second box 37 fits in the bottom plate 36a of the first box 36. On the outer surface of the side plate 36 b of the first box 36, a male screw groove 36 c that is screwed with the female screw groove 20 a of the first upper cylindrical member 20 is formed.

  The second box body 37 is formed so that its outer contour has a shape of a predetermined standard (for example, JIS standard), and is fitted to a commercially available socket wrench. Therefore, it is possible to easily tighten or relax the screwing of the solidifying material injecting device 33 and the first upper cylindrical member 20 with the socket wrench.

  The connecting member 35 is connected to the inner surface of the bottom plate 37a of the second box at the center of the outer surface in the height direction, and is fixed by welding, for example. The connecting member 35 is formed with an injection port 35a over the entire length, and a male screw portion 41a formed in the hole wall of the injection port 35a over the entire length at the tip of a solidified material transporting pipe 41 to be described later. A female screw portion 35b is formed to be screwed together.

  Next, the ground 3 abutting against the back surface of the structure 2 is investigated using the changed form 1B of the survey hole / solidification material injection device 1A and the survey hole / solidification material injection device 1A, and the boundary between the ground 3 and the structure 2 A method of injecting the solidifying material into the weak point portion 5 such as a cavity formed from the above will be described. First, a method for investigating the situation of the ground 3 will be described. First, a survey hole and solidifying material injection device 1A is installed as shown in FIG. The best method of installation is to place and fix the investigation hole / solidifying material injection device 1A when placing the concrete of the structure 2 and to cure the concrete, but the method is not limited to this. There is also a method in which a hole is formed after placement, and the investigation hole / solidifying material injection device 1A is inserted therein.

  Next, as shown in FIG. 13, the lid 14 and the cap of the female member 28 of the investigation hole and solidifying material injecting apparatus 1 </ b> A are removed in order, and the female member 28 and the female member 28 and a pair of male members 38 are removed. Is installed. Here, if the pressure gauge 39 is confirmed to detect that the water pressure is acting, the pressure gauge 39 is removed, and the female member 28 and the pair of male members 38 are mounted as shown in FIG. For example, a drainage pipe 40 such as a hose is installed to discharge the groundwater and perform pressure relief.

  When it is confirmed that the pressure has been completely removed, the drain pipe 40 and the water stop device 11 are removed. Here, the water stop device 11 is removed after the fastening member 30 is relaxed to attenuate the fixation between the seal member 25 and the tubular body 10. Since the shaft portion 31 of the settlement measurement body 15 inserted into the tubular body 10 can be visually observed, the position of the settlement measurement body 15 is confirmed and the presence or absence of a cavity is detected.

  Since the size of the cavity is determined by the amount of movement of the shaft portion 31 of the settlement measurement body 15 toward the ground 3 side, the apex of the shaft portion 31 of the settlement measurement body 15 is set in advance when the survey hole / solidifying material injection device 1A is installed. It is effective to grasp or clearly indicate the position of the cylinder 10. Here, when the weak point part 5 is formed, the earth and sand intrusion prevention member 12 is taken out. When the weak part 5 is not formed, the water stop device 11, the cap, and the lid body 14 are attached again, and the original state before the investigation of the ground 3 is restored.

  In this way, the presence of groundwater can be confirmed by the pressure gauge 39 before the solidified material is injected, and the pressure can be released, so there is no danger in investigating the condition of the ground 3. Moreover, since the water stop apparatus 11 is installed in the cylindrical body 10 so that attachment or detachment is possible, it can be removed and reused when it is judged that the solidification material injection | pouring is required after pressure measurement. Furthermore, since the water stop apparatus 11 is accommodated in the inside of the cylindrical body 10, it does not protrude to the space 4 side from the surface 2b of the structure 2, and does not become an obstacle at the time of construction.

  Next, a method for injecting a solidifying material will be described. As shown in FIG. 15, the solidifying material injection device 33 is screwed into the first upper cylindrical member 20 of the tubular body 10 from which the water stop device 11 and the like have been removed, and the connecting member 35 is screwed into the female screw portion 35b. The solidified material transport pipe 41 having the male screw portion 41a to be connected is connected and the solidified material 42 is press-fitted. Here, since the backflow prevention member 34 is fixed to the lower cylindrical member 18 by screwing, it is possible to press-fit the solidified material into the weak spot portion 5, and the solidified material is surely filled into the weak spot portion 5.

  The upper cylindrical body 16 and the lower cylindrical body 17, the rod 27 and the female member 28, and the bolt 30 a and the nut 30 b of the fastening member 30 are joined by screwing that functions as a length adjusting mechanism, and thus installed. It is possible to flexibly cope with changes in the thickness of the part of the structure 2 and the member.

(Other embodiments)
The present invention is not limited to the above embodiments. The above-described embodiment is merely an example, and any structure having substantially the same configuration as the technical idea described in the claims of the present invention and having the same function and effect can be used. It is included in the technical scope of the present invention.

  For example, in the above embodiment, the cylindrical body is made of steel, but is not limited to this, and may be made of resin, for example.

  In some cases, an urging member is installed on the lower cylindrical member 18 of the investigation hole and solidifying material injecting apparatus 1A to urge the settlement measurement body 15 toward the ground 3 side. Here, an elastic member is applied as the urging member, and the elastic member is attached to the settlement measurement body 15 in a pulled state. The settlement measurement body 15 is pressed against the ground 3 by the urging member.

  Therefore, when the weakened portion 5 is formed on the ground 3, the settlement measurement body 15 can move to the ground 3 side not only by its own weight but also by the biasing force received from the biasing member, and can show the weakened portion 5. Become. As a result, even if the investigation hole and solidifying material injecting apparatus 1A is installed on the side wall 2Ab of the structure 2, the weak point portion 5 can be detected. In addition, when measuring using another measuring member without using the settlement measuring body 15, it is not necessary to install the settlement measuring body 15.

(A) is a cross-sectional view taken along the line AA in FIG. 1 (a), and (b) is a survey hole and solidifying material injecting device used for investigating the condition of the ground contacting the back of the structure. (C) is a BB sectional view of Drawing 1 (b). It is a perspective view showing a mode that the investigation hole and solidification material injection | pouring apparatus of FIG. 1 was installed in the structure. (A) is a CC plan view of FIG. 3 (b), (b) is a longitudinal sectional view of the cylindrical body of FIG. 1, and (c) is a DD sectional view of FIG. 3 (b). FIG. 1 is an enlarged view of the water stop device. (A) is a top view of the sealing member of FIG. 1, (b) is EE sectional drawing of Fig.5 (a). (A) is a top view of the restraint ring of FIG. 1, (b) is LL sectional drawing of Fig.6 (a). (A) is a top view of the closing member of FIG. 1, (b) is FF sectional drawing of Fig.7 (a). (A) is a top view of the locking member of FIG. 1, (b) is GG sectional drawing of Fig.8 (a). (A) is a bottom view of the lid body of FIG. 1, and (b) is an HH sectional view of FIG. 9 (a). (A) is a longitudinal cross-sectional view of the settlement measurement object of FIG. 1, (b) is an II plan view of FIG. 10 (a). (A) is a JJ plan view of FIG. 11 (b), and (b) is an enlarged cross section showing a state in which an investigation hole and solidifying material injection device used for injecting the solidifying material into the ground is installed in the structure. FIG. (A) is a bottom view of the solidifying material injecting device of FIG. 11, and (b) is a KK cross-sectional view of FIG. 12 (a). It is sectional drawing showing a mode that a pressure gauge is installed in the investigation hole and solidification material injection | pouring apparatus of FIG. It is sectional drawing showing a mode that a drain pipe is installed in the investigation hole and solidification material injection | pouring apparatus of FIG. It is sectional drawing showing a mode that a solidification material is inject | poured using the investigation hole and solidification material injection | pouring apparatus of FIG.

Explanation of symbols

1A: Investigation hole / solidifying material injection device 1B ... Investigation hole / solidification material injection device 2 ......... Structure 2A ... Main body 2B. 3 ......... Ground 4 ......... Space 5 ......... Weak point 10 ... Tubular body 11 ... Water stop device 12 ... Sediment intrusion prevention member 13 ... Water expandable member 14 ... Lid 14a ... Projection Portion 14b ... Extraction hole 15 ... Subsidence measuring body 16 ... Upper cylindrical body 17 ... Lower cylindrical body 18 ... Lower cylindrical member 18a ... Male thread groove 19 ... Self-supporting facilitating member 19a ... Water outlet 20 ... No. 1 Upper cylindrical member 20a ... Female thread groove 21 ... Water stop device support member 21a ... Insertion hole 22 ... Second upper cylindrical member 22a ... Insertion hole 23 ... Pull-out prevention member 24 ... Circular pipe member 25 ... Seal member 25a ... Restraint ring 26 ... Closing member 26b ... Connection hole 26c ... Attached member hole 27... Rod 28... Female member 29... Locking member 29 a... Cutout portion 29 b... Female member hole 29 c ... Tightening member hole 30. Shaft 32 ... head 32a ... bottom plate 32b ... side plate 33 ... solidifying material injection device 34 ... backflow preventing member 35 ... connecting member 35a ... injection port 35b ... internal thread 36 ... first box 36a ... Bottom plate 36b (of the first box) ... Side plate 36c (of the first box) ... Male screw groove 37 ... Second box 37a ... Side plate 37b (of the second box) ... Bottom plate (of the second box) 38 ... Male member 39 ... Pressure gauge 40 ... Drain pipe 41 ... Transport pipe 41a ... Male screw part 42 ... Solidified material L1 ... Length t1 of investigation hole and solidifying material injection device 1A ... Structure Thickness D1 of the part or member of the outer diameter D2 other than the portion where the protruding portion is formed ... The protruding portion is formed The outer diameter of the part that is

Claims (8)

A survey hole and solidifying material injection device installed in a part of the structure that separates the ground from the space,
A tubular body communicating the ground and the space;
A water stop device provided with a female member, which is installed in the tubular body and closes the inside of the tubular body,
The female member has a communication hole that allows the ground and the space to communicate with each other, and includes a water stop valve that blocks the communication hole,
An investigation hole and solidifying material injecting apparatus, wherein the communication hole is disconnected by the water stop valve when a male member paired with the female member is connected to the female member.   The said water stop apparatus is detachable, The investigation hole and solidification material injection | pouring apparatus of Claim 1 characterized by the above-mentioned. It is installed in the tubular body, and has a solidifying material injection device that closes the inside of the tubular body,
The solidifying material injecting device includes a connecting member for connecting the solidifying material injecting device and the solidifying material supply pipe, and an injection port for communicating the ground and the space is formed in the connecting member. The apparatus for injecting a survey hole and solidifying material according to claim 2.   The survey water and solidifying material injection device according to any one of claims 1 to 3, wherein the water stop device is installed inside the cylindrical body.   A water-permeable earth and sand intrusion prevention member for preventing infiltration of ground soil and sand into the inside of the tubular body is installed on the ground side from the water stop device in a state of closing the inside of the tubular body. The survey hole / solidifying material injection device according to claim 1.   6. A structure in which the investigation hole and solidifying material injection device according to claim 1 is installed. An installation step of installing the investigation hole and solidifying material injecting device according to any one of claims 1 to 5 in a structure;
A pressure measurement step of measuring pressure by installing a pressure gauge provided with the male member on the female member;
A ground investigation and solidification material injection method, comprising: a solidification material injection step of injecting a solidification material into the ground.   8. The ground investigation and solidification material injection according to claim 7, further comprising a depressurization step of installing and draining a drain pipe having the male member attached to the female member after the pressure measuring step. Method.

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