JP2016144919A - Method and device for repairing drilled part of concrete structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate repairing work of the drilled part of a concrete structure.SOLUTION: A through-hole H formed in a wall body WB for collecting the concrete core of the wall body WB is mechanically closed by a water cutting-off tool 3. When an operation rod 3bc constituting the water cutting-off plug support rod 3b of the water cutting-off tool 3 is rotated, a long nut 3an fitted in the tip thereof in a detachable state rotates to rotate and move the shaft part 3ax of the water cutting-off plug 3a toward the water cutting-off plug support rod 3b. Then, a water cutting-off head part 3ah connected to the shaft part 3ax also moves toward the water cutting-off plug support rod 3b to enter the hollow part of the tip of a seal member 3as between the water cutting-off head part 3ah and the water cutting-off plug support rod 3b. Thus, the tip part of the seal member 3as expands in a radial direction to be pressed to the inner wall surface of the through-hole H, thereby closing the through-hole H.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a method and an apparatus for repairing a drilled portion of a concrete structure, for example, a repair technique for closing and repairing a through-hole drilled in a concrete structure in order to extract a concrete core from the concrete structure. Is.

  In general, as a method of confirming the strength of an existing concrete structure or investigating the state of deterioration due to neutralization or salt damage, a concrete core is collected from the concrete structure and Various methods are used to conduct inspections and tests. In order to collect the concrete core, a method of directly extracting the concrete core from the concrete structure by drilling a through hole in the concrete structure using a drilling machine equipped with a core cutter or the like is known (for example, , See Patent Document 1).

JP 2008-246743 A

  By the way, when the concrete structure is buried in the ground or built underwater, high water pressure works on the back side of the concrete structure, so the through holes drilled in the concrete structure are repaired. In doing so, it is necessary to perform a reforming operation by injecting a chemical solution or the like from the through hole into the back side of the concrete structure. For this reason, the work of repairing the hole in the concrete structure is troublesome and time consuming, and there is a problem that the cost increases.

  The present invention has been made from the above-described technical background, and an object of the present invention is to provide a technique capable of facilitating the repairing work of the drilled portion of the concrete structure.

  In order to solve the above-described problem, the method for repairing a drilled portion of a concrete structure according to claim 1 of the present invention includes a step of inserting a closing means inside a drilled portion formed in the concrete structure, Expanding the closing member installed on the distal end side of the operating member so as to contact the inner wall of the drilling portion by operating the operating member of the closing means, and closing the drilling portion; And a step of filling the hole-drilling portion with an embedding material after being closed by the closing member.

  According to a second aspect of the present invention, in the first aspect of the invention, the closing means includes a closing main body portion and a support main body portion that supports the closing main body portion. A moving member installed on the distal end side of the operating member in a movable state along the extending direction of the drilling portion by operating the operating member, and operating the operating member as a moving operation of the moving member It is installed between the conversion member to be converted, and the moving member and the support main body, and when the moving member is moved toward the support main body by the operation of the operation member, it comes into contact with the inner wall of the drilling portion. The closing member that expands to close the drilling portion, and the support main body portion is inserted into the outer tube and the outer tube, and holds the conversion member in a detachable state. And an operation member.

  Moreover, the present invention according to claim 3 is the invention according to claim 2, wherein the support main body is further in contact with the inner wall of the outer tube and the outer periphery of the operation member. A positioning member that is installed and positions the operation member at a radial center of the outer tube is provided.

  According to a fourth aspect of the present invention, there is provided a repair device for a drilling portion of a concrete structure according to the present invention in a state where an opening is aligned with a drilling portion formed in the concrete structure on the surface side of the concrete structure. And a closing tube for closing the drilling portion, and a closing means for inserting the hole into the drilling portion through the closing tube and closing the drilling portion, wherein the closing means includes an operation member and the operation And a closing member that is installed on the distal end side of the member and expands so as to be in contact with the inner wall of the drilling portion by operating the operation member, thereby closing the drilling portion.

  According to a fifth aspect of the present invention, in the invention of the fourth aspect, the closing means includes a closing main body portion and a support main body portion that supports the closing main body portion. A moving member installed on the distal end side of the operating member in a movable state along the extending direction of the drilling portion by operating the operating member, and operating the operating member as a moving operation of the moving member It is installed between the conversion member to be converted, and the moving member and the support main body, and when the moving member is moved toward the support main body by the operation of the operation member, it comes into contact with the inner wall of the drilling portion. The closing member that expands to close the drilling portion, and the support main body portion is inserted into the outer tube and the outer tube, and holds the conversion member in a detachable state. And an operation member.

  According to a sixth aspect of the present invention, in the fifth aspect of the present invention, the support main body is further installed in a state of being in contact with each other between the inner wall of the outer tube and the outer periphery of the operation member. And a positioning member that positions the operation member at a radial center of the outer tube.

  According to the first aspect of the present invention, it is possible to facilitate the work of repairing the drilled portion of the concrete structure.

  According to invention of Claim 2, it becomes possible to implement | achieve the closing means which closes the drilling part of a concrete structure with a simple structure.

  According to invention of Claim 3, it becomes possible to improve the operativity of the closing means which closes the drilling part of a concrete structure.

  According to the fourth aspect of the present invention, it is possible to facilitate the repairing work of the drilled portion of the concrete structure.

  According to invention of Claim 5, it becomes possible to implement | achieve the closing means which closes the drilling part of a concrete structure with a simple structure.

  According to the sixth aspect of the present invention, it is possible to improve the operability of the closing means for closing the hole drilling portion of the concrete structure.

It is a partially broken sectional view along the axial direction of the repair apparatus which concerns on one embodiment of this invention. It is an expanded sectional view along the axial direction of the water stop tool of the restoration | repair apparatus of FIG. (A) is an expansion perspective view of the water stop plug of the restoration | repair apparatus of FIG. 1, (b) is a disassembled perspective view of the water stop plug of FIG. 3 (a). (A) is sectional drawing along the axial direction of the water stop plug of FIG. 3, (b) is a top view of the axial direction rear end surface of the water stop plug of FIG. 4 (a). (A) is principal part sectional drawing along the axial direction of a water stop tool, (b) is principal part sectional drawing along the axial direction of the water stop tool at the time of closing. (A) is explanatory drawing of the process of drilling a through-hole in a wall body, and extract | collecting a concrete core, (b) is explanatory drawing of the extraction | collection process of the concrete core following Fig.6 (a). (A) is explanatory drawing of the repair process of the through-hole of a wall body, (b) is explanatory drawing of the repair process of the through-hole of a wall body following FIG. 7 (a). (A) is explanatory drawing of the restoration process of the through-hole of a wall body following FIG. 7 (a), (b) is an expanded sectional view of the front-end | tip part of the water stop tool of FIG. 8 (a). (A) is an enlarged cross-sectional view of the tip of the waterstop in the wall through-hole repairing process following FIG. 8, and (b) is a waterstop tool in the wall through-hole repairing process following FIG. 9 (a). It is an expanded sectional view of the tip part.

  Hereinafter, an embodiment as an example of the present invention will be described in detail with reference to the drawings. Note that components having the same function are denoted by the same reference symbols throughout the drawings for describing the embodiment, and the repetitive description thereof will be omitted.

  FIG. 1 is a partially broken cross-sectional view along the axial direction of the repair device according to the present embodiment, and FIG. 2 is an enlarged cross-sectional view along the axial direction of the water stop tool of the repair device of FIG.

  The repair device 1 of the present embodiment is a device for repairing a through hole H drilled in a concrete wall body (concrete structure) WB constructed close to a coast, for example. That is, for the wall WB constructed close to the coast, the ground water in the surrounding ground contains a lot of salt and is easily affected by salt damage. Drill the hole (H), collect the concrete core of the wall WB (especially the back part of the wall WB that is in direct contact with groundwater, etc.), and reduce the strength of the wall WB due to neutralization and salt damage. The degree and the like are grasped by various inspections and tests. The repair device 1 according to the present embodiment is a device that closes and repairs the through hole H left in the wall WB after the concrete core is collected, and includes a water stop pipe (closed pipe) 2 and a water stop tool (closing means). 3 and a feeding device 4. The diameter of the through hole H is, for example, about 65 mm. Further, high water pressure or the like is acting on the back side of the wall WB (left side of the wall WB in FIG. 1).

  As shown in FIG. 1, the water stop pipe 2 is such that ground water or earth and sand on the back side of the wall body WB is ejected to the surface side of the wall body WB (the right side of the wall body WB in FIG. 1) through the through hole H of the wall body WB. This is a structure that prevents this. The water stop pipe 2 is constituted by, for example, a cylindrical steel pipe, and is installed on the surface of the wall body WB in a state where the opening of the axial front end face is aligned with the through hole H on the surface side of the wall body WB. Yes. That is, a flange portion 2a protruding in the radial direction of the water stop tube 2 is formed at the axial end of the water stop tube 2, and a bolt or the like is used in a state where the flange portion 2a is in close contact with the surface of the wall body WB. By joining to the wall body WB, the water stop pipe 2 is fixed in a state of protruding almost vertically from the surface of the wall body WB.

  A water stop cap 2b is attached to the opening of the rear end face in the axial direction of the water stop pipe 2 in a detachable state. The water stop cap 2 b is a member that supports the water stop tool 3 in a state in which the water stop tool 3 is slidable in the axial direction and the rotational direction in a state where the sealing performance of the water stop pipe 2 is ensured. That is, a seal hole is formed in the center of the water stop cap 2b in the radial direction, and an O ring (not shown) for water stop is attached to the opening peripheral edge of the seal hole. Thereby, the water stop tool 3 inserted in the seal hole of the water stop cap 2b can be slid in the axial direction and the rotation direction without causing the pressurized water in the water stop pipe 2 to leak from the water stop pipe 2. It has become.

  A water supply portion 2 c is provided at an intermediate position in the axial direction of the water stop pipe 2. The water supply part 2c is a supply port part which supplies pressurized water into the water stop pipe 2, and is provided with a water supply valve. Moreover, the water supply part 2c is connected to the pressure tank for water supply (not shown) through the water supply pipe (not shown). The pressure tank for water supply is provided with a pressure control device, and can control the pressure of water supplied from the water supply part 2c into the water stop pipe 2.

  Further, a drainage portion 2 d is provided at an intermediate position in the axial direction of the water stop pipe 2. The drainage part 2d is a discharge port part for discharging the pressurized water in the water stop pipe 2 to the outside of the water stop pipe 2, and includes a drain valve. The drainage part 2d is connected to a drainage pressure tank (not shown) through a drainage pipe (not shown). The pressure tank for drainage is provided with a pressure control device and can control the pressure of discharged water discharged from the water stop pipe 2 through the drainage part 2d. The water supply pressure tank and the drainage pressure tank are each connected to a common compressor (not shown) through a pressure distribution pipe.

  In addition, a partition valve 2 e is installed at an intermediate position in the axial direction of the water stop pipe 2. The partition valve 2e is a valve for preventing groundwater or earth and sand on the back side of the wall body WB from being ejected to the surface side of the wall body WB through the through hole H when the tool inserted into the water stop pipe 2 is replaced. For example, it is constituted by various known valves that close the water pipe in a state where it can be opened and closed. By closing the gate valve 2e, the water stop cap 2b at the rear end of the water stop tube 2 can be opened while the front end side of the water stop tube 2 is filled with pressurized water.

  In addition, a pressure gauge 2 f is attached to the axially distal end side of the water stop pipe 2. The pressure gauge 2f is a device that measures the water pressure in the water stop pipe 2. For example, the pressure gauge 2f includes various pressure gauges known as gauges for measuring the water pressure in the water pipe. By providing this pressure gauge 2f, fluctuations in the water pressure in the water stop pipe 2 can be managed.

  As shown in FIGS. 1 and 2, the water stop tool 3 is a tool that mechanically closes the through hole H of the wall WB, and includes a water stop plug (closed main body portion) 3 a and a water stop plug support rod ( Support body portion) 3b. The water stop plug 3a is a component that closes the through hole H of the wall body WB, and is supported in a detachable state at the axial end portion of the water stop plug support bar 3b. Further, the water stop plug 3a is inserted into the through hole H of the wall body WB through the water stop pipe 2 while being supported by the water stop plug support rod 3b. As shown in FIG. 2, the water stop plug 3a includes a water stop head (moving member) 3ah, a shaft portion (converting member) 3ax, a long nut (converting member) 3an, a presser fitting 3am, and a seal member. (Closing member) 3as. The water stop plug 3a will be described in detail later.

  As shown in FIGS. 1 and 2, the water stop plug support bar 3b is a component that supports the water stop plug 3a and closes the through hole H by operating the water stop plug 3a. Is inserted into the through hole H of the wall body WB. As shown in FIG. 2, the water stop plug support rod 3b includes an outer tube 3bt, an operation rod (operation member) 3bc, an operation rod seal fitting 3bm, a nut socket 3bs, and a ring member (positioning member) 3br. And.

  The outer pipe 3bt is made of, for example, a cylindrical steel material, and is inserted into the water stop pipe 2 through the seal hole of the water stop cap 2b at the rear end of the water stop pipe 2. Thus, the outer tube 3bt is supported in a state in which the outer tube 3bt can slide in the axial direction and the rotational direction while ensuring the sealing performance of the water stop tube 2. In the outer tube 3bt, a part of the operation rod 3bc, a nut socket 3bs and a ring member 3br are accommodated.

  The operation bar 3bc is a member that operates the water stop plug 3a, and is made of, for example, a cylindrical bar-shaped steel material. A part of the operation rod 3bc is inserted into the outer tube 3bt through the seal hole of the operation rod seal fitting 3bm at the rear end of the outer tube 3bt. Thereby, the operating rod 3bc is supported in a state in which the outer tube 3bt is slidable in the rotational direction while ensuring the sealing performance of the outer tube 3bt.

  The nut socket 3bs is fixed to the distal end portion of the operation rod 3bc. For example, a flat hexagonal socket hole is formed on the front end surface of the nut socket 3bs, and the rear end portion of the long nut 3an of the water stop plug 3a is detachable in the socket hole. It is mated.

  The ring member 3br is a member that supports the operation rod 3bc at the center in the radial direction of the outer tube 3bt and suppresses the operation rod 3bc from moving in the axial direction by adding sliding resistance to the operation rod 3bc. It is installed at an intermediate position on the distal end side in the axial direction of the outer tube 3bt. The ring member 3br is made of, for example, a ring-shaped rubber, and is installed between the inner wall of the outer tube 3bt and the outer periphery of the operation rod 3bc. By providing the ring member 3br, it is possible to improve the operability of the rotating operation of the operation rod 3bc, and it is possible to improve the operability of the expanding operation of the seal member 3as of the water stop plug 3a described later.

  As shown in FIG. 1, the feeding device 4 is a device that supports the water stop tool 3 in a state in which the water stop tool 3 is movable in the axial direction, and includes a support frame 4 a, a support member 4 b, a rail 4 c, and a moving table 4 d. I have. The support frame 4a is formed by assembling various steel materials such as H-shaped steel, groove-shaped steel, and angle steel by bolts or welding, and receives a reaction force when the water stop tool 3 is inserted into the through hole H. It is being fixed to the side wall surface and bottom face of wall body WB in the state which can do. The support member 4b is a member that supports the water stop tool 3 in a state of being movable in the axial direction, and is installed on the support frame 4a. The rail 4c is a member that guides the movement of the movable table 4d. The moving table 4d is a component that supports the water stop tool 3 in a fixed state and moves the water stop tool 3 in the axial direction.

  Next, the structural example of the water stop plug 3a is demonstrated with reference to FIGS. 3 (a) is an enlarged perspective view of the water stop plug of the repairing device of FIG. 1, FIG. 3 (b) is an exploded perspective view of the water stop plug of FIG. 3 (a), and FIG. FIG. 4B is a plan view of the axial rear end surface of the water stop plug of FIG. 4A, and FIG. 5A is an axial direction of the water stop tool. FIG. 5B is a cross-sectional view of the main part along the axial direction of the water stop tool at the time of closing.

  A water stop head 3ah is installed at the tip of the water stop plug 3a so as to be movable in the axial direction. The water stop head 3ah is made of, for example, a truncated cone-shaped plastic formed so as to gradually become smaller in diameter toward the water stop plug support rod 3b. In addition, the diameter at the front end surface side of the water stop head 3ah is, for example, about 55 mm.

  A shaft portion 3ax is fixed at the center in the radial direction of the water stop head 3ah. The shaft portion 3ax is made of, for example, a cylindrical rod-shaped steel bolt, and is fixed to the water stop head 3ah with a screw 3ab or the like as shown in FIG. 4 (a). An O-ring (not shown) is mounted between the water-stopping head 3ah and the shaft portion 3ax on the tip surface side of the water-stopping head 3ah from the viewpoint of ensuring water-stopping. Further, a male screw is cut on the surface of the protruding end of the shaft portion 3ax, and a long nut 3an is threadably engaged with the protruding end. In addition, the axial direction length of the axial part 3ax is about 120 mm, for example. Further, in FIGS. 4A and 5, the male screw of the shaft portion 3ax is omitted in order to make the drawings easy to see.

  The long nut 3an is made of, for example, an outer hexagonal steel nut, and the hollow inner wall surface thereof is internally threaded to match the external thread of the shaft portion 3ax. Accordingly, when the long nut 3an is rotated in one direction, the water stop head 3ah moves in a direction approaching the water stop plug support rod 3b, while when the long nut 3an is rotated in the reverse direction, the water stop head 3ah is It is the structure which moves to the direction away from the water stop plug support bar 3b. In addition, the axial direction length of the long nut 3an is about 70 mm, for example. Further, in FIGS. 4A and 5, the female screw of the long nut 3an is omitted for easy understanding of the drawings.

  A presser fitting 3am is mounted between the long nut 3an and the seal member 3as. As shown in FIGS. 3B and 4B, the presser fitting 3am is formed of, for example, a circular flat plate-like metal fitting. In the presser fitting 3am, two claw portions 3af and 3af are integrally formed in the vicinity of the outer periphery of the flat surface on the water stop plug support rod 3b side, and the claw portions 3af and 3af are grooves 3bg at the tip of the outer tube 3bt. (See FIG. 5). Thereby, the water stop plug 3a is temporarily stopped by the water stop plug support bar 3b and is prevented from rotating. The presser fitting 3am is not joined to the long nut 3an.

  A seal member 3as is installed between the presser fitting 3am and the water stop head 3ah. The seal member 3as is a closing member that closes the through hole H of the wall body WB. That is, as shown in FIG. 5, when the water stop head 3ah is moved in a direction approaching the water stop plug support rod 3b by the rotation operation of the long nut 3an, the water stop head is inserted into the hollow on the tip side of the seal member 3as. When the portion 3ah enters, the outer peripheral portion of the tip end of the seal member 3as expands radially outward to strongly contact the inner wall surface of the through hole H of the wall body WB and close the through hole H. As a result, the through hole H is machined. It is possible to close automatically.

  In general, when the wall body WB is buried in the ground or constructed in water, a high water pressure or the like is working on the back side of the wall body WB, so the through hole H of the wall body WB is repaired. At this time, it is necessary to perform a reforming operation by injecting a chemical solution or the like from the inside of the through-hole H to the back side of the concrete structure, and the repairing operation is troublesome and labor-intensive and the cost is increased. . On the other hand, in this embodiment, since the through hole H of the wall body WB can be mechanically closed by the water stop plug 3a, the repair work of the through hole H of the wall body WB is facilitated. Can do. For this reason, the repair time of the through-hole H can be shortened. Moreover, since the chemical | medical solution for a modification | reformation etc. becomes unnecessary, the repair cost of the through-hole H can be reduced. Moreover, the water stop tool 3 itself can also be realized with a simple structure. In addition, the part S enclosed with the broken line in FIG.5 (b) has shown the water stop position.

  Such a seal member 3as is formed in a cylindrical shape so as to surround the outer periphery of the water stop head 3ah and the shaft portion 3ax. As shown in FIGS. 4A and 5, the hollow inner wall portion on the distal end side of the seal member 3 as is aligned with the outer peripheral surface of the water stop head 3ah so that the water stop head 3ah can easily enter. It forms so that it may become a small diameter gradually toward the water stop plug support bar 3b. Further, the rear end surface of the seal member 3as is in contact with the presser fitting 3am.

  The seal member 3as is made of an elastic member such as rubber. Thereby, deformation | transformation of the sealing member 3as can be made easy and higher sealing performance can be ensured. Moreover, as shown to Fig.4 (a) and FIG. 5, the recessed part 3ad dented in radial direction is formed in the axial direction middle in the hollow inner wall face of the sealing member 3as. Thereby, a deformation | transformation of the sealing member 3as can be made easy. The axial length of the seal member 3as is about 75 mm, for example.

  Next, an example of the repair method according to the present embodiment will be described with reference to FIGS. FIG. 6A is an explanatory diagram of a process of collecting a concrete core by drilling a through hole in the wall body, FIG. 6B is an explanatory diagram of a concrete core sampling process subsequent to FIG. 6A, and FIG. FIG. 7A is an explanatory diagram of a wall through-hole repairing process, FIG. 7B is an explanatory diagram of a wall through-hole repairing process following FIG. 7A, and FIG. Explanatory drawing of the restoration process of the through-hole of the wall body following a), FIG.8 (b) is an expanded sectional view of the front-end | tip part of the water stop tool of Fig.8 (a), Fig.9 (a) is the wall following FIG. FIG. 9B is an enlarged cross-sectional view of the distal end portion of the water stop tool in the wall through-hole repairing process subsequent to FIG. 9A. It is.

  First, as shown in FIG. 6 (a), after the water stop pipe 2 is installed at the concrete core sampling position on the surface of the wall WB, the core drilling device 10 is passed through the seal hole of the water stop cap 2b of the water stop pipe 2. The core cutter 10a is inserted into the water stop pipe 2. The core cutter 10a is made of, for example, a cylindrical steel material, and a cutting bit portion (not shown) is provided at a tip portion (cutting portion) thereof. An advance / retreat rod 10b is connected to the rear end of the core cutter 10a. The advancing / retracting rod 10b is made of, for example, a cylindrical steel material, and a rear end portion thereof is connected to the rotation drive mechanism portion 10c. The rotation drive mechanism 10c is a mechanism that rotates the advance / retreat rod 10b and the core cutter 10a, and is installed in a state of being movable in the axial direction (advance / retreat direction) along the rail 4c. Further, a drilled water supply pipe 10d is connected to the rear end portion of the advance / retreat rod 10b.

  Subsequently, the wall cutter WB is cut by the core cutter 10a by moving the rotary drive mechanism portion 10c along the rail 4c toward the wall body WB while rotating the core cutter 10a by the rotation drive mechanism portion 10c. Thereby, as shown in FIG.6 (b), the through-hole H is drilled in the wall WB. In this drilling step, drilling water is supplied from the drilling water supply pipe 10d to the bit part (cutting part) at the tip of the core cutter 10a through the hollow pipe of the advance / retreat rod 10b. At this time, it is possible to determine whether or not the through hole H has been drilled in the wall WB based on the pressure value in the water stop pipe 2 measured by the pressure gauge 2f.

  Next, after the cutting bit portion of the core cutter 10a is moved rearward from the partition valve 2e, the partition valve 2e is closed, and the core cutter 10a is extracted from the water blocking pipe 2. As a result, the core cutter 10a is extracted while preventing groundwater, earth and sand on the back side of the wall body WB from being ejected through the through holes H to the surface side of the wall body WB. Then, while collecting the concrete core of the wall WB accommodated in the hollow of the core cutter 10a, the core drilling apparatus 10 is disassembled.

  Next, as shown in FIG. 7 (a), after the feed device 4 is installed, the water stop tool 3 supported by the moving table 4d and the support member 4b of the feed device 4 with the gate valve 2e closed is used. It inserts in the water stop pipe 2 through the seal hole of the water stop cap 2b. Subsequently, as shown in FIG. 7B, after the gate valve 2e is opened, the water stop tool 3 is stopped by moving the moving base 4d of the feeding device 4 along the rail 4c toward the wall body WB. The water plug 3a is inserted into the through hole H, and the movement of the movable table 4d is stopped at a position where the water stop plug 3a slightly protrudes from the back surface of the wall body WB. In addition, the water supply part 2c of the water stop pipe 2 is closed when the water stop tool 3 is inserted.

  Thereafter, as shown in FIGS. 8A and 8B, by rotating the operation rod 3bc of the water stop tool 3, the nut socket 3bs at the tip of the operation rod 3bc is rotated to form the nut socket 3bs. The fitted long nut 3an is rotated. Then, since the shaft portion 3ax of the water stop plug 3a screwed to the long nut 3an moves while rotating toward the water stop plug support rod 3b, the water stop head 3ah joined to the shaft portion 3ax also stops water. It moves while rotating toward the plug support bar 3b. For this reason, the water stop head 3ah enters the tip side hollow of the seal member 3as and is fixed at a position where the rotation of the long nut 3an is stopped. Thereby, the front-end | tip part of the sealing member 3as expands to radial direction outward, and as a result of being pressed on the inner wall face of the through-hole H, the through-hole H is closed. In this case, since the seal member 3as of the water stop plug 3a is expanded by the rotation of the operation rod 3bc, the seal member 3as is expanded with a relatively small force even when high water pressure is applied from the back side of the wall body WB. H can be closed.

  Next, after the outer tube 3bt of the water stop tool 3 is rotated and removed from the claw portion 3af of the presser fitting 3am of the water stop plug 3a, as shown in FIG. 9A, the water stop plug support of the water stop tool 3 is supported. The rod 3b (the outer tube 3bt and the operation rod 3bc) is moved to the surface side of the wall body WB and extracted from the through hole H and the water stop tube 2. The water stop plug 3a of the water stop tool 3 remains in the through hole H as it is. Thereby, the closed state of the through-hole H can be maintained. Subsequently, after dismantling the water stop pipe 2, as shown in FIG. 9B, the through hole H is repaired by filling the through hole H of the wall body WB with an embedding material 11 such as mortar. Exit.

  As described above, in the present embodiment, the through hole H of the wall body WB can be mechanically closed by the water stop plug 3a, so that the repair work of the through hole H of the wall body WB can be facilitated. . For this reason, the repair time of the through-hole H can be shortened. Moreover, since the chemical | medical solution for a modification | reformation etc. becomes unnecessary, the repair cost of the through-hole H can be reduced. Moreover, the water stop tool 3 itself can also be realized with a simple structure.

  As mentioned above, the invention made by the present inventor has been specifically described based on the embodiment. However, the embodiment disclosed in this specification is an example in all respects and is limited to the disclosed technology. It is not a thing. That is, the technical scope of the present invention should not be construed restrictively based on the description in the above-described embodiment, but should be construed according to the description of the scope of claims. All modifications are included without departing from the technical scope equivalent to the described technique and the gist of the claims.

  For example, in the above-described embodiment, the water stop head and the shaft portion of the water stop plug are separated from each other, but the present invention is not limited to this, and the water stop head and the shaft portion are made of metal. It may be integrated.

  As described above, the repairing method and the repairing apparatus according to the present invention are useful when applied to the repairing of a drilled portion of a concrete structure.

DESCRIPTION OF SYMBOLS 1 Restoration apparatus 2 Water stop pipe 2a Flange part 2b Water stop cap 2c Water supply part 2d Drainage part 2e Partition valve 2f Pressure gauge 3 Water stop tool 3a Water stop plug 3ah Water stop head 3ax Shaft part 3an Long nut 3am Presser fitting 3as Seal member 3b Water stop plug support rod 3bt Outer tube 3bc Operation rod 3bm Operation rod seal fitting 3bs Nut socket 3br Ring member 4 Feeder 4a Support base 4b Support member 4c Rail 4d Moving base 10 Core drilling device 10a Core cutter 10b Advance / Retreat rod 10c Rotation drive mechanism 10d Drilling water supply pipe 11 Embedding material WB Wall H Through-hole

Claims (6)

Inserting a closing means into the inside of the hole formed in the concrete structure;
Expanding the closing member installed on the distal end side of the operating member to be in contact with the inner wall of the drilling portion by operating the operating member of the closing means, and closing the drilling portion;
A step of filling an embedded material in the hole after the hole is closed by the closing member;
A method for repairing a drilled portion of a concrete structure characterized by comprising: The closing means includes a closing main body portion and a support main body portion that supports the closing main body portion,
The closing main body is
A moving member installed on the distal end side of the operating member in a state of being movable along the extending direction of the drilling hole by operating the operating member;
A conversion member that converts the operation of the operation member into a movement operation of the moving member;
It is installed between the moving member and the support main body, and when the moving member is moved toward the support main body by the operation of the operating member, it is expanded so as to be in contact with the inner wall of the drilling portion. The closing member for closing the hole;
With
The support main body is
An outer tube,
The operation member inserted into the outer tube and holding the conversion member in a detachable state; and
The method for repairing a drilled portion of a concrete structure according to claim 1, comprising:   The support main body further includes a positioning member that is installed in contact with each other between the inner wall of the outer tube and the outer periphery of the operation member, and positions the operation member at the radial center of the outer tube. The method for repairing a drilled portion of a concrete structure according to claim 2. A closed pipe that is installed in a state where the opening is aligned with the hole formed in the concrete structure on the surface side of the concrete structure, and closes the hole;
A closing means that is inserted into the drilling portion through the closing tube and closes the drilling portion;
With
The closing means includes an operation member,
A closing member that is installed on the distal end side of the operation member, expands to contact the inner wall of the drilling portion by operating the operation member, and closes the drilling portion;
An apparatus for repairing a drilled portion of a concrete structure, comprising: The closing means includes a closing main body portion and a support main body portion that supports the closing main body portion,
The closing main body is
A moving member installed on the distal end side of the operating member in a state of being movable along the extending direction of the drilling hole by operating the operating member;
A conversion member that converts the operation of the operation member into a movement operation of the moving member;
It is installed between the moving member and the support main body, and when the moving member is moved toward the support main body by the operation of the operating member, it is expanded so as to be in contact with the inner wall of the drilling portion. The closing member for closing the hole;
With
The support main body is
An outer tube,
The operation member inserted into the outer tube and holding the conversion member in a detachable state; and
The apparatus for repairing a hole in a concrete structure according to claim 4, comprising:   The support main body further includes a positioning member that is installed in contact with each other between the inner wall of the outer tube and the outer periphery of the operation member, and positions the operation member at the radial center of the outer tube. The apparatus for repairing a hole in a concrete structure according to claim 5.

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