JP6042779B2 - Method for fixing shear reinforcement member - Google Patents

Description

  The present invention relates to a method of inserting and fixing a shear reinforcement member into an upward shear reinforcement member insertion hole formed in an existing concrete structure.

  With the aging of concrete structures and the review of design standards, shear reinforcement for fixing shear reinforcement members to existing structures is performed. This type of shear reinforcement is performed, for example, as follows. First, a shear reinforcement member insertion hole for inserting a shear reinforcement member into the structure is formed. Next, the shear reinforcement member is inserted into the shear reinforcement member insertion hole, and subsequently, the grout material is filled into the shear reinforcement member insertion hole. Thereafter, the grout material is solidified and the shear reinforcement member inserted into the shear reinforcement member insertion hole is fixed to the structure body, whereby the concrete structure is subjected to shear reinforcement (see, for example, Patent Documents 1 and 2). ).

JP 2012-001962 A JP 2012-001963 A

  In the conventional methods disclosed in Patent Documents 1 and 2, a shear reinforcement member is inserted into a shear reinforcement member insertion hole extending in the horizontal direction. Further, as a method for fixing a shear reinforcement member equipped with a fixing body, a method using an injection hose for injecting a grout material and an exhaust hose for exhausting air in the shear reinforcement member insertion hole has been conventionally known. A method of removing the exhaust hose from the inside of the shear reinforcement member insertion hole has also been devised. However, there is a problem that the installation speed is slow because it takes time to install the injection hose and the exhaust hose.

  Further, a plastic grout material is known as a grout material that has a high viscosity and is difficult to sag even when filled in a hole drilled upward with an inner diameter of about 30 to 100 mm. When the shear reinforcement member is inserted in such a state that the plastic grout material is filled in the upward hole, when the grout material corresponding to the volume of the shear reinforcement member overflows from the hole, the grout in the shear reinforcement member insertion hole is inserted. There was a risk of air entering the material.

  Therefore, the object of the present invention is to prevent air from being mixed into the grout material in the shear reinforcement member insertion hole in the method of fixing the shear reinforcement member to the upward shear reinforcement member insertion hole. An object of the present invention is to provide a fixing method for a shear reinforcing member capable of suppressing the decrease.

  The present invention is a method for fixing a shear reinforcement member in which a bottomed shear reinforcement member insertion hole is drilled upward from one side to an existing concrete structure, and the shear reinforcement member is inserted and fixed in the shear reinforcement member insertion hole. A step of filling a plastic grout material into the shear reinforcement member insertion hole, a step of filling the plastic grout material into the storage container, a step of inserting the shear reinforcement member into the storage container, and the plastic grout material and the shear reinforcement member. The process of bringing the filled storage container into communication with the shear reinforcement member insertion hole and closely adhering to the concrete structure, and inserting the push-in member through the opening at the lower end of the storage container to push up the shear reinforcement member and into the shear reinforcement member insertion hole And a step of inserting into the device.

  In the fixing method of the shear reinforcement member according to the present invention, a storage container for pre-filling the shear reinforcement member and the plastic grout material is prepared, and the shear reinforcement member is inserted into the storage container by filling the plastic grout material. . After the plastic grout material is filled in the shear reinforcement member insertion hole drilled in the existing concrete structure, the storage container is communicated with the shear reinforcement member insertion hole and is brought into close contact with the concrete structure. The pushing member is inserted from the opening at the lower end of the storage container, and the shear reinforcing member is pushed up and inserted into the shear reinforcing member insertion hole. After the filling container filled with the plastic grout material is communicated with the shear reinforcement member insertion hole and brought into close contact with the concrete structure, the shear reinforcement member in the filling container is inserted into the shear reinforcement member insertion hole. Therefore, air is prevented from being mixed into the plastic grout material of the shear reinforcement member insertion hole. Further, since the shear reinforcement member moves in the plastic grout material filled in the filling container and the shear reinforcement member insertion hole, air enters the shear reinforcement member insertion hole as the shear reinforcement member moves. Can be prevented. The upward shear reinforcement member insertion hole is not limited to the vertical upward insertion hole, and may be an insertion hole inclined obliquely upward.

  Alternatively, the shear reinforcement member may be inserted into a cylindrical storage container that is longer than the shear reinforcement member, and the flange at the upper end of the storage container may be attached to the concrete structure to closely contact the periphery of the opening of the shear reinforcement member insertion hole. preferable. Thereby, since the full length of a shear reinforcement member can be stored in a plastic grout material by inserting a shear reinforcement member in a storage container longer than a shear reinforcement member, the shear reinforcement member of the state covered with the plastic grout material Can be inserted into the shear reinforcement member insertion hole, and the risk of air entering the shear reinforcement member insertion hole is further reduced. Moreover, since the flange surface provided at the upper end of the storage container can be attached to the concrete structure, the storage container can be stably held, and the displacement and inclination of the storage container can be prevented to prevent air intrusion. The fear can be reduced. Also, by attaching the flange surface parallel to the construction surface of the concrete structure, the extending direction of the cylindrical storage container is regulated, so the shear reinforcement member insertion hole and the extending direction of the storage container can be easily matched. Can be made.

  In addition, it is preferable to include a step of closing the opening of the shear reinforcement member insertion hole by inserting the shear reinforcement member into the shear reinforcement member insertion hole and then sliding the lid along the surface of the concrete structure. . Since the opening of the shear reinforcement member insertion hole can be closed simply by sliding the lid in this way, the opening can be closed immediately after the shear reinforcement member is inserted into the shear reinforcement member insertion hole, and shear reinforcement is performed. The risk of air entering the member insertion hole can be reduced.

  It is preferable to provide a step of closing the opening of the shear reinforcement member insertion hole with a lid having a magnet after the shear reinforcement member is inserted into the shear reinforcement member insertion hole. Thereby, the lid can be fixed and the opening of the shear reinforcement member insertion hole can be closed using the force that the magnet of the lid adsorbs to the shear reinforcement member. Therefore, attachment and removal of the lid body are facilitated, and workability can be improved.

  After inserting the shear reinforcement member into the storage container, it is preferable to swell the plastic grout material above the upper end of the storage container. In this way, by depositing excess plastic grout material, it is possible to press the excessively accumulated plastic grout material against the plastic grout material in the shear reinforcement member insertion hole, and air is contained in the plastic grout material in the storage container. The risk of contamination can be reduced.

  Further, in the step of inserting the shear reinforcement member into the storage container, the position of the shear reinforcement member may be regulated using a spacer that restrains the position of the shear reinforcement member at the center of the storage container. Thereby, since the position of the shear reinforcement member can be regulated at the center of the storage container, the position of the storage container is aligned with the shear reinforcement member insertion hole, and the positions of the shear reinforcement member insertion hole and the shear reinforcement member are adjusted. The shear reinforcement member can be reliably inserted into the shear supplementary reinforcement member insertion hole, and the working speed can be improved.

  According to the present invention, in the method of fixing the shear reinforcement member to the upward shear reinforcement member insertion hole, air is prevented from being mixed into the grout material in the shear reinforcement member insertion hole, thereby reducing the quality. The fixing method of the shear reinforcement member which can be suppressed can be provided.

It is sectional drawing which shows the state in which the shear reinforcement member was inserted in the shear reinforcement member insertion hole drilled in the concrete structure. It is a perspective view which shows the state from which the slide shutter in FIG. 1 is open | released from the downward direction. It is a perspective view which shows the slide shutter in FIG. 1 from the construction surface side. It is sectional drawing which shows the state which has inserted the grout material injection | pouring hose in the shear reinforcement member insertion hole, and has inject | poured the grout material. It is the schematic which shows a mode that the operator is inject | pouring grout material, supporting the grout material injection | pouring hose. It is a perspective view which shows the insertion pipe filled with the grout material G, and the shear reinforcement member accommodated in this insertion pipe. It is a perspective view which shows the state which attached the pipe for insertion to the construction surface of a concrete structure from the downward direction. It is a perspective view which shows the sealing material pinched | interposed between the bottom face of a shutter board holding member, and the flange surface of an insertion pipe. It is sectional drawing which shows the pipe for insertion with which the centering spacer was mounted | worn. FIG. 10 is a perspective view showing a centering spacer in FIG. 9. It is sectional drawing which shows the state which has closed and closed the opening part of the shear reinforcement member insertion hole using the cover body which has a magnet.

  Hereinafter, preferred embodiments of a fixing method for a shear reinforcing member according to the present invention will be described in detail with reference to the drawings.

  As shown in FIG. 1, an upward-facing shear reinforcement member insertion hole 2 is drilled in an existing concrete structure 1, and a shear reinforcement member 3 is inserted into the upward shear reinforcement member insertion hole 2 to be fixed using a grout material G. The method of making it explain. FIG. 1 shows a state in which a shear reinforcement member 3 is inserted into a shear reinforcement member insertion hole 2 drilled in the concrete structure 1.

  Examples of the existing concrete structure 1 include a box culvert, a tunnel, and other concrete walls. A construction surface 4 is formed on the ceiling surface of the concrete structure 1, and a shear reinforcement member insertion hole 2 is constructed on the construction surface 4.

  In the fixing method of the shear reinforcement member, first, the construction surface 4 is drilled using a drill, and the bottomed shear reinforcement member insertion hole 2 is drilled. The hole diameter of the shear reinforcement member insertion hole 2 is about 30 to 50 mm. The shear reinforcement member insertion hole 2 is formed so as to extend upward from the construction surface 4 facing downward. The shear reinforcement member insertion hole 2 extends vertically upward. When the rear end fixing body 6 larger than the inner diameter of the shear reinforcement member insertion hole 2 is disposed at the rear end portion of the shear reinforcement member 3, in the vicinity of the opening 2 a of the shear reinforcement member insertion hole 2, compared to other portions. An enlarged hole 2b having a large inner diameter is formed. In a state in which the shear reinforcement member 3 is fixed, the rear end fixing body 6 of the shear reinforcement member 3 is accommodated in the diameter expansion hole 2b.

  The shear reinforcement member 3 is composed of a long screw joint reinforcing bar, and a male screw portion is formed over the entire length. A front end fixing body 5 is attached to the front end portion of the shear reinforcement member 3, and a rear end fixing body 6 is attached to the rear end portion. These fixing members 5 and 6 are made of, for example, ceramics and have rust prevention properties. Further, after cutting the shear reinforcement member insertion hole 2 on the construction surface 4, a primer such as a moisture absorption inhibitor may be applied to the inner wall surface of the shear reinforcement member insertion hole 2 as a base treatment. As the shear reinforcement member 3, a rod-like strength member such as a reinforcing bar having a predetermined strength can be used.

  After drilling the shear reinforcement member insertion hole 2, the slide shutter 11 is attached to the opening 2a of the shear reinforcement member insertion hole 2, as shown in FIG. As shown in FIGS. 2 and 3, the slide shutter 11 includes a shutter plate 12 that slides along the construction surface 4 and a shutter plate holding member 13 that holds the shutter plate 12. The shutter plate holding member 13 holds the shutter plate 12 and guides the movement of the shutter plate 12. The shutter plate holding member 13 has a plate shape, and a recess 13a capable of accommodating the shutter plate 12 is formed on the back surface (the surface facing the construction surface 4) of the shutter plate holding member 13. The recess 13 a has a shape corresponding to the outer shape of the shutter plate 12.

  Further, an opening 13b penetrating in the thickness direction is formed at the center of the shutter plate holding member 13. The opening 13b is disposed so as to coincide with the opening 2a of the shear reinforcement member insertion hole 2, and the grout material G and the shear reinforcement member 3 are inserted into the shear reinforcement member insertion hole 2 through the opening 13b. Also, bolt holes 13 c for attaching the shutter plate holding member 13 to the construction surface 4 are opened at the four corners of the shutter plate holding member 13. The front end portion 12 a of the shutter plate 12 is recessed in an arc shape so as to follow the peripheral edge of the opening portion 13 b of the shutter plate holding member 13.

  As shown in FIG. 1, before the shutter plate holding member 13 is attached to the construction surface 4, a driving anchor 14 for fixing the shutter plate holding member 13 is applied. The driving anchor 14 is constructed around the opening 2 a of the shear reinforcement member insertion hole 2, and the bolt hole 13 c of the shutter plate holding member 13 is arranged corresponding to the position of the driving anchor 14. In the state where the driving anchor 14 is constructed, the male thread portion 14 a at the lower end of the driving anchor 14 projects downward from the construction surface 4. The shutter plate holding member 13 is fixed to the construction surface 4 by inserting the male screw portion 14a into the bolt hole 13c of the shutter plate holding member 13 and fastening a fixing nut to the male screw portion 14a. Thereby, the slide shutter 11 is fixed to the construction surface 4.

  After the slide shutter 11 is attached to the construction surface 4, a step of filling the grout material G into the shear reinforcement member insertion hole 2 is performed. As shown in FIGS. 4 and 5, the grout material G is injected into the shear reinforcement member insertion hole 2 using the grout material injection hose 7. On the outer peripheral surface in the vicinity of the tip of the grout material injection hose 7, a flange portion 7a projecting outward is formed. The collar portion 7 a is, for example, a steel ring, and the collar portion 7 a is formed by attaching the steel ring to the cylindrical body at the tip of the grout material injection hose 7.

  The outer diameter of the collar portion 7 a is slightly smaller than the inner diameter of the shear reinforcement member insertion hole 2. The gap between the inner wall surface of the shear reinforcement member insertion hole 2 and the collar portion 7a when the grout material injection hose 7 is inserted into the shear reinforcement member insertion hole 2 is preferably about 1 mm. The gap between the inner wall surface of the shear reinforcement member insertion hole 2 and the collar portion 7a is preferably of a size that allows air to pass through and prevents the grout material G from passing therethrough. It is preferable that the collar part 7a is attached to a position away from the tip of the grout material injection hose 7 by about 20 to 40 mm.

  The grout material G is a plastic grout material having viscosity, and is a cement-type grout material in the form of a slurry or clay. The plastic grout material G is produced by mixing and kneading a plasticizer and an additive immediately before the shear reinforcing member insertion hole 2 is filled. After the kneaded and mixed plastic grout material G is introduced into the hopper and a vibrator is applied to extract air from the grout material G, the grout material G is filled into the shear reinforcement member insertion hole 2.

  In the process of filling the grout material G into the shear reinforcement member insertion hole 2, the operator M inserts the grout material injection hose 7 into the shear reinforcement member insertion hole 2. The grout material injection hose 7 is inserted to the depth of the shear reinforcement member insertion hole 2 and pressed against the top end 2c. With the tip of the grout material injection hose 7 pressed against the top end 2c of the shear reinforcement member insertion hole 2, the injection of the grout material G is started.

  The grout material G flowing out from the grout material injection hose 7 is filled between the top end 2c and the collar portion 7a. At this time, the air between the top end 2c and the flange portion 7a is pushed out by the grout material G, passes through the gap between the flange portion 7a and the inner wall of the shear reinforcement member insertion hole 2, and is lower than the flange portion 7a. Flows out. Further, the grout material injection hose 7 is pushed down by the grout material G injected into the shear reinforcement member insertion hole 2. Since the grout material G that has flowed out pushes down the collar portion 7a, the grout material injection hose 7 moves downward in the shear reinforcement member insertion hole 2. When the grout material G is filled to the lower end of the shear reinforcement member insertion hole 2, the injection of the grout material G is stopped. The grout material G is filled in the expanded hole 2b without gaps. Since the plastic grout material G is filled in the upward shear reinforcement member insertion hole 2, the grout material G is prevented from dripping from the shear reinforcement member insertion hole 2. After the grout material G is filled, the shutter plate 12 is closed to close the opening 2a of the shear reinforcement member insertion hole 2. 4 and 5, the illustration of the slide shutter 11 is omitted.

  FIG. 6 is a perspective view showing the insertion pipe filled with the grout material G and the shear reinforcement member 3 accommodated in the insertion pipe. The insertion pipe (storage container) 15 forms a cylindrical body, a flange 15a is provided at the upper end, and a bottom plate 15b that covers the opening of the cylinder is provided at the lower end. A bottom plate opening 15c penetrating in the thickness direction is formed at the center of the bottom plate 15b. When the grout material G is filled in the insertion pipe 15, a rubber plug 16 is attached to the bottom plate opening 15c. The bottom plate opening 15c is an opening into which a push rod 17 (see FIG. 7) used when pushing up the shear reinforcement member 3 is inserted. The insertion pipe 15 is longer than the length of the shear reinforcement member 3.

  After the step of filling the grout material G into the shear reinforcement member insertion hole 2, the step of filling the grout material G into the insertion pipe 15 is executed. Here, the same plastic grout material G as that injected into the shear reinforcement member insertion hole 2 is injected. The insertion pipe 15 may be supported so as to extend in the vertical direction by an operator, for example, or may be supported so as to extend in the vertical direction by another support tool. After supporting the insertion pipe 15, the grout material G is injected into the insertion pipe 15 from the opening at the upper end using the injection hose 18. The injection hose 18 is directed downward, and the grout material G flowing out of the injection hose 18 is stored in the insertion pipe 15. Since the bottom plate opening 15c is closed by the rubber plug 16, the grouting material G is prevented from flowing out from the bottom plate opening 15c.

  As the injection hose 18 for injecting the grout material G into the insertion pipe 15, the grout material injection hose 7 used when injecting the grout material G into the shear reinforcement member insertion hole 2 may be used. Further, the grout material G in the container may be poured into the insertion pipe 15 without using the injection hose.

  After the step of filling the insertion pipe 15 with the grout material G, the step of inserting the shear reinforcement member 3 into the insertion pipe 15 is executed. Here, the direction of the shear reinforcement member 3 is aligned with the direction of insertion into the shear reinforcement member insertion hole 2, and the shear reinforcement member 3 is inserted into the insertion pipe 15. The rear end fixing body 6 of the shear reinforcement member 3 is disposed on the lower side and pushed into the insertion pipe 15. The shear reinforcement member 3 is accommodated in the insertion pipe 15 and the entire length from the rear end fixing body 6 to the front end fixing body 5 is covered with the grout material G.

  After inserting the shear reinforcement member 3 into the insertion pipe 15, the grout material G is further added, and the grout material G is raised above the opening at the upper end of the insertion pipe 15. Since the plastic grout material G has viscosity, the plastic grout material G can be raised above the opening at the upper end. Then, after the grout material G is raised, the insertion pipe 15 is vibrated to extract the air in the grout material G.

  Next, the process of attaching the insertion pipe 15 to the construction surface 4 is executed. Here, the flange 15 a of the insertion pipe 15 is attached to face the bottom surface of the shutter plate holding member 13. Further, a sealing member 19 is sandwiched between the flange 15a and the shutter plate holding member 13 to improve the sealing performance and prevent air from entering. FIG. 8 is a perspective view showing the seal member 19. The seal member 19 is formed in a plate shape using, for example, rubber, sponge or the like, and an opening 19 a corresponding to the shear reinforcement member insertion hole 2 is formed at the center of the seal member 19. Further, a ring portion 19b is formed around the opening 19a so as to project in the thickness direction.

  A bolt hole 15d is opened in the flange 15a, and the male threaded portion 14a of the anchor is inserted into the bolt hole 15d to tighten the nut. As a result, the insertion pipe 15 is fixed to the driving anchor 14 and attached to the construction surface 4 of the concrete structure 1. The flange 15a is fixed in close contact with the seal member 19, the seal member 19 is in close contact with the shutter plate holding member 13, and the shutter plate holding member 13 is in close contact with the construction surface 4. The flange 15a, the seal member 19, and the shutter plate A gap through which air can pass is not formed between the holding member 13 and the construction surface 4.

  Further, when attaching the insertion pipe 15, the shutter plate 12 is slid to open the opening 2 a of the shear reinforcement member insertion hole 2. The insertion pipe 15 is attached so that the grout material G accumulated excessively on the insertion pipe 15 is pressed against the grout material G in the shear reinforcement member insertion hole 2. For example, the excess grout material G spreads into the recess 13a of the shutter plate holding member 13 and pushes the air in the recess 13a to the outside.

  After the insertion pipe 15 is attached, a step of inserting the shear reinforcement member 3 into the shear reinforcement member insertion hole 2 is executed. The rubber stopper 16 attached to the bottom plate opening 15c of the insertion pipe 15 is removed, and the push rod 17 is inserted through the bottom plate opening 15c. The push-in bar 17 is pushed up and pressed against the bottom of the rear end fixing body 6 of the shear reinforcement member 3 to push up the shear reinforcement member 3. When the shear reinforcement member 3 is pushed up and enters the shear reinforcement member insertion hole 2, a part of the grout material G in the shear reinforcement member insertion hole 2 moves from the shear reinforcement member insertion hole 2 into the insertion pipe 15. After the shear reinforcement member 3 is moved into the shear reinforcement member insertion hole 2 and the rear end fixing member 6 is accommodated in the shear reinforcement member insertion hole 2, the shutter plate 12 is slid to slide into the shear reinforcement member insertion hole 2. The opening 2a is closed. As shown in FIG. 1, the shutter plate 12 is closed after the shear reinforcement member 3 is inserted into the shear reinforcement member insertion hole 2. In addition, the push rod 17 should just have predetermined intensity | strength and can push up the shear reinforcement member 3. FIG.

  After closing the opening 2 a of the shear reinforcement member insertion hole 2, the push rod 17 is pulled out from the insertion pipe 15, the rubber plug 16 is attached to the bottom plate opening 15 c again, and the insertion pipe 15 is driven and removed from the anchor 14. . After removing the insertion pipe 15 and the seal member 19, the fixing nut is again driven and screwed into the male threaded portion 14 a of the anchor 14 to fix the shutter plate holding member 13. The insertion pipe 15 and the grout material G remaining in the insertion pipe 15 are reused when the shear reinforcement member 3 is inserted into the other shear reinforcement member insertion hole 2.

  Using the shutter plate 12, the opening 2a of the shear reinforcement member insertion hole 2 is closed and cured, and the grout material G is awaited to be cured. After about one day, the slide shutter 11 and the driving anchor 14 are removed, and the surface of the concrete structure 1 is appropriately cleaned, and the fixing of the shear reinforcement member 3 is completed.

  According to such a fixing method of the shear reinforcement member 3, the insertion pipe 15 is prepared, the insertion pipe 15 is filled with the grout material G, and the shear reinforcement member 3 is inserted into the insertion pipe 15. Later, in a state where the insertion pipe 15 is in close contact with the construction surface 4 via the seal member 19 and the shutter plate holding member 13, the shear reinforcement member 3 in the insertion pipe 15 is pushed up using the push rod 17 to reinforce the shear. It can be inserted into the member insertion hole 2. After the insertion pipe 15 filled with the grout material G is brought into close contact with the shear reinforcement member insertion hole 2, the shear reinforcement member 3 in the insertion pipe 15 is inserted into the shear reinforcement member insertion hole 2. Therefore, it is possible to prevent air from entering between the insertion pipe 15 and the construction surface 4. Further, since the shear reinforcement member 3 moves in the grout material G filled in the insertion pipe 15 and the shear reinforcement member insertion hole 2, the air is moved along with the movement of the shear reinforcement member 3. 2 does not enter.

  Moreover, since the grout material G is filled in the insertion pipe 15 longer than the shear reinforcement member 3 and the shear reinforcement member 3 is inserted, the entire length of the shear reinforcement member 3 can be accommodated in the grout material G. Therefore, the shear reinforcement member 3 covered with the grout material G can be inserted into the shear reinforcement member insertion hole 2 and air can be prevented from entering the shear reinforcement member insertion hole 2.

  Further, since the flange 15a is provided at the upper end portion of the insertion pipe 15, the flange surface is brought into close contact with the bottom surface of the shutter plate holding member 13, and the insertion pipe 15 can be attached to the construction surface 4. The insertion pipe 15 can be stably held, the displacement of the insertion pipe 15 can be prevented, and air can be prevented from entering the shear reinforcement member insertion hole 2. Further, since the flange surface forms a surface orthogonal to the longitudinal direction of the insertion pipe 15, the insertion pipe 15 is attached by attaching the insertion pipe 15 with the flange surface facing the bottom surface of the shutter plate holding member 13. Since the extending direction of 15 is regulated, the extending directions of the shear reinforcement member insertion hole 2 and the insertion pipe 15 can be easily matched. Therefore, the shear reinforcement member 3 in the insertion pipe 15 can be reliably inserted into the shear reinforcement member insertion hole 2.

  Further, after inserting the shear reinforcement member 3 into the shear reinforcement member insertion hole 2, the shutter plate 12 is slid along the construction surface 4 of the concrete structure 1 to close the opening 2a of the shear reinforcement member insertion hole 2. Therefore, the opening 2a of the shear reinforcement member insertion hole 2 can be closed only by sliding the shutter plate 12. Therefore, the opening 2a can be closed immediately after the shear reinforcement member 3 is inserted into the shear reinforcement member insertion hole 2, and air intrusion can be prevented.

  After inserting the shear reinforcement member 3 into the insertion pipe 15, the grout material G is raised above the upper end of the insertion pipe 15, so that the excess grout material G is inserted into the shear reinforcement member insertion hole 2. It can be pressed against the grout material G, and the risk of air entering from between the upper end of the insertion pipe 15 and the concrete structure 1 can be further reduced. This prevents air from being mixed into the grout material G in the shear reinforcement member insertion hole 2.

  The present invention is not limited to the above-described embodiment, and various modifications as described below are possible without departing from the gist of the present invention.

  In the above embodiment, the shear reinforcement member 3 is inserted into the vertically upward shear reinforcement member insertion hole 2, but the direction in which the shear reinforcement member insertion hole 2 extends is not limited to the vertical upward direction and is obliquely upward. The direction may extend in the direction.

  In the above embodiment, the grout material G is filled in the shear reinforcement member insertion hole 2, and then the grout material G is filled in the insertion pipe 15 and the shear reinforcement member 3 is inserted. After the material G is filled and the shear reinforcement member 3 is inserted, the grout material G may be filled into the shear reinforcement member insertion hole 2. Further, the filling of the grout material G into the shear reinforcement member insertion hole 2 and the filling of the grout material G into the insertion pipe 15 may be performed in parallel.

  In the above embodiment, the cylindrical insertion pipe 15 is used as the filling container, but the filling container is not limited to a cylindrical one, and may be a rectangular tube or other shape. Further, the filling container may be shorter than the length of the shear reinforcement member 3.

  In the above embodiment, the insertion pipe 15 is attached with the opening 2a of the shear reinforcement member insertion hole 2 open. However, the insertion pipe 15 is closed with the opening 2a of the shear reinforcement member insertion hole 2 closed. After attaching, the opening 2a may be opened.

  In the above embodiment, the bottom plate opening 15c of the insertion pipe 15 is closed using the rubber plug 16, but the bottom plate opening 15c may be closed using another material such as a rubber sheet.

  Further, as shown in FIG. 9, a centering spacer 21 that restrains the position of the shear reinforcement member 3 to the center of the insertion pipe 15 is used to insert the shear reinforcement member 3 while restricting the position of the shear reinforcement member 3. After insertion into the pipe 15, the shear reinforcement member 3 in the insertion pipe 15 may be inserted into the shear reinforcement member insertion hole 2.

  FIG. 10 is a perspective view showing the centering spacer 21 in FIG. The centering spacer 21 includes a pair of upper and lower upper rings 22 and 23 that contact the inner wall of the insertion pipe 15, and a plurality of guide portions that connect the upper ring 22 and the lower ring 23 to contact the shear reinforcement member 3. 24. The centering spacer 21 is formed of a linear member such as a wire. The plurality of guide portions 24 are arranged, for example, at four locations at equal intervals in the circumferential direction. The guide part 24 is curved so as to protrude to the center side. The plurality of guide portions 24 approach each other as they proceed downward from the upper ring 22, approach most closely at an intermediate portion in the vertical direction, and are spaced apart toward the lower ring 23. The shear reinforcement member 3 is held at the center of the centering spacer 21 by the middle portion of the guide portion 24 coming into contact with the shear reinforcement member 3.

  For example, the centering spacer 21 may be attached to the shear reinforcement member 3 before being inserted into the insertion pipe 15 and may be inserted into the insertion pipe 15 together with the shear reinforcement member 3. Further, after inserting the centering spacer 21 into the insertion pipe 15 in advance, the shear reinforcement member 3 may be inserted.

  Moreover, in the said embodiment, although the opening part 2a is opened and closed by sliding the shutter plate 12 as a cover body which closes the opening part 2a of the shear reinforcement member insertion hole 2, using other cover bodies, The opening 2a may be closed. Moreover, in the said embodiment, although the slide shutter 11 and the pipe 15 for insertion are fixed using the driving anchor 14, you may fix using an adhesive agent etc., and you may fix by another method. .

  For example, as shown in FIG. 11, the opening 2 a of the shear reinforcement member insertion hole 2 may be closed by adsorbing the lid 31 having the magnet 32 to the shear reinforcement member 3. After inserting the shear reinforcement member 3 into the shear reinforcement member insertion hole 2, the lid 31 is fixed using the force that the magnet 32 of the lid body 31 adsorbs to the shear reinforcement member 3. The opening 2a can be closed. Therefore, attachment and removal of the lid 31 are facilitated, and workability can be improved. Since it is not necessary to construct a driving anchor for supporting the lid 31, workability can be improved. As the magnet 32, a magnet made of zirconium can be used.

  As described above, when the lid body 31 having the magnet 32 is used, the support member 33 for preventing the shear reinforcement member 3 from descending is used to prevent the shear reinforcement member 3 from descending. The support member 33 is disposed so as to project obliquely downward from the outer peripheral surface of the shear reinforcement member 3. A plurality of support members 33 are arranged on the object centering on the shear reinforcement member 3, extend obliquely downward from the shear reinforcement member 3, and abut against the inner wall of the shear reinforcement member insertion hole 2. Accordingly, the lowering of the shear reinforcement member 3 can be prevented and the lid 31 can be adsorbed to the rear end fixing body 6 of the shear reinforcement member 3, and the grout material G can be cured using the lid 31. .

  DESCRIPTION OF SYMBOLS 1 ... Concrete structure, 2 ... Shear reinforcement member insertion hole, 2a ... Shear reinforcement member insertion hole opening, 3 ... Shear reinforcement member, 11 ... Slide shutter, 12 ... Shutter plate (lid body), 15 ... Insertion pipe (Storage container), 15a ... flange, 17 ... push rod (push member), 21 ... centering spacer, 31 ... lid, 32 ... magnet.

Claims (6)

In a fixing method of a shear reinforcement member, a bottomed shear reinforcement member insertion hole is drilled upward from one side of an existing concrete structure, and a shear reinforcement member is inserted into the shear reinforcement member insertion hole and fixed.
Filling the shear reinforcing member insertion hole with a plastic grout material;
Filling the storage container with a plastic grout material;
Inserting the shear reinforcement member into the storage container;
Contacting the storage container filled with the plastic grout material and the shear reinforcement member with the shear reinforcement member insertion hole and closely contacting the concrete structure;
And a step of inserting a pushing member from an opening at a lower end of the storage container, pushing up the shear reinforcing member and inserting it into the shear reinforcing member insertion hole. In the cylindrical storage container longer than the shear reinforcement member, the shear reinforcement member is inserted,
The fixing method of the shear reinforcement member according to claim 1, wherein a flange at an upper end of the storage container is attached to the concrete structure and closely adhered to an opening of the shear reinforcement member insertion hole.   After the shear reinforcement member is inserted into the shear reinforcement member insertion hole, a step of sliding the lid along the surface of the concrete structure to close the opening of the shear reinforcement member insertion hole is provided. The fixing method of the shear reinforcement member according to claim 1 or 2.   3. The method according to claim 1, further comprising a step of closing an opening of the shear reinforcement member insertion hole with a lid having a magnet after the shear reinforcement member is inserted into the shear reinforcement member insertion hole. Fixing method of the shear reinforcement member.   The shear reinforcement member according to any one of claims 1 to 4, wherein after the shear reinforcement member is inserted into the storage container, the plastic grout material is raised to a position above the upper end of the storage container. Fixing method.   The step of inserting the shear reinforcement member into the storage container restricts the position of the shear reinforcement member using a spacer that restrains the position of the shear reinforcement member at the center of the storage container. The fixing method of the shear reinforcement member as described in any one of claim | item 1 -5.

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