JP2014114552A - Fixing method for shear reinforcement member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fixing method for a shear reinforcement member that can suppress a decrease in quality by reducing the outflow of grout from a shear reinforcement member insertion hole in upward construction.SOLUTION: An upward shear reinforcement member insertion hole 2 is bored in a concrete structure 1, and a grout storage tank 9 is installed outside an opening part of the insertion hole 2. A funnel-shaped container 15 is connected to the storage tank 9 through a filling hose 11. A grout material is supplied from the funnel-shaped container 15 to fill the storage tank 9 and insertion hole 2 with the grout material. A liquid level in the funnel-shaped container 15 is set to be above a top end 2a of the shear reinforcement member insertion hole 2 to generate a head difference between the grout material storage tank 9 and the funnel-shaped container 15. A rubber plate 10 prevents the grout material from flowing out from a through hole 9f of a bottom plate of the storage tank 9. A shear reinforcement member 3 is inserted into the through hole 9f and arranged in the shear reinforcement member insertion hole 2 to be fixed by hardening the grout material.

Description

  The present invention relates to a method for fixing a shear reinforcement member in which a shear reinforcement member is inserted into a shear reinforcement member insertion hole formed in an existing concrete structure and fixed.

  With the aging of structures and the review of building standards, shear reinforcement that fixes the 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. Then, 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 structure body is subjected to shear reinforcement.

  In performing this shear reinforcement, it is often preferable from the viewpoint of reinforcing the structure that the shear reinforcement member insertion hole is formed along a substantially horizontal direction. Here, as the grout material filled in the shear reinforcement member insertion hole, a material having fluidity at the time of filling is preferably used. For this reason, when the shear reinforcement member insertion hole is formed substantially in the horizontal direction, the grout material filled in the shear reinforcement member insertion hole leaks from the inlet, and the shear reinforcement member insertion hole is filled with the grout material. There are problems that make it difficult.

  In order to solve this problem, a fixing method for a shear reinforcement member is disclosed in which box-shaped grout material storage means is installed at the drilling position of the shear reinforcement member insertion hole (see, for example, Patent Document 1). In this method of fixing a shear reinforcement member, a shear reinforcement member insertion hole is formed from one side of an existing concrete structure.

  Next, a box-shaped grout material storage means is installed at the drilling position of the shear reinforcement member insertion hole. Subsequently, the opening formed in the grout material storage means is brought into close contact with the outer periphery of the drilling position of the shear reinforcement member insertion hole to form a sealed space between the shear reinforcement member insertion hole and the sealed space and the shear reinforcement. The member insertion hole is communicated with.

  Then, the grout material having fluidity is filled in the shear reinforcement member insertion hole, and the grout material flowing out from the shear reinforcement member insertion hole is received by the grout material storage means. Thereafter, the shear reinforcement member is inserted into the shear reinforcement member insertion hole. Then, the shear reinforcing member insertion hole is substantially filled with the grout material, and the grout material is cured to fix the shear reinforcing member.

JP 2010-13858 A

  However, in the fixing method of the shear reinforcement member disclosed in Patent Document 1, after the grout material storage means is installed and a sealed space is formed between the shear reinforcement member insertion hole, the shear reinforcement member insertion hole is shear-reinforced. The member is inserted. For this reason, since it is necessary to once put the shear reinforcement member into the grout material storage means, the length of the grout material storage means must be made longer than the length of the shear reinforcement member, and the apparatus becomes larger, Although excess grout material was collected, there was a problem that a large amount of grout material had to be prepared.

  It is also conceivable to insert a shear reinforcement member into the shear reinforcement member insertion hole before installing the grout material storage means. However, if the grout material is filled into the shear reinforcement member insertion hole after the shear reinforcement member is inserted into the shear reinforcement member insertion hole, there is a problem that the grout material is difficult to sufficiently fill the shear reinforcement member insertion hole.

  Further, when the shear reinforcement member is installed upward, it is necessary to fill the fluid reinforcement grout material into the shear reinforcement member insertion hole extending upward, so that the liquid level of the grout material is likely to be lowered and the shear reinforcement member There was a problem that air could easily enter the insertion hole. The construction in the upward direction is more difficult to construct than in the case of construction in the downward and lateral directions, which is a burden on the worker, and the quality may be reduced.

  In addition, it is possible to use a plastic grout material with low fluidity when it is installed upward, but the plastic grout material easily changes its properties in response to temperature changes and requires specialized knowledge. There is a problem that handling is not easy. In addition, since plastic grout materials are expensive compared to fluid grout materials, it is required to construct them using fluid grout materials when it is desired to reduce construction costs.

  Therefore, an object of the present invention is to provide a fixing method of a shear reinforcement member that can reduce the outflow of the grout material from the upward shear reinforcement member insertion hole and suppress the deterioration of the quality. Moreover, the subject of this invention is the shear which can fully fix a shear reinforcement member to a structure body by filling a grout material suitably in a shear reinforcement member insertion hole, without enlarging an apparatus or requiring a lot of grout materials. The object is to provide a fixing method of a reinforcing member.

  According to the fixing method of the shear reinforcement member of the present invention, a bottomed shear reinforcement member insertion hole is drilled upward from one side of an existing concrete structure, and the shear reinforcement member is inserted into the shear reinforcement member insertion hole. In the fixing method of the shear reinforcement member fixed by the material, the shear reinforcement member insertion hole is drilled upward in the existing concrete structure and the grout material storage part capable of storing the fluid grout material is inserted into the shear reinforcement member. Connect the grout material supply part that can supply grout material to the grout material storage part and the grout material storage part using a connecting pipe, and install the grout material from the grout material supply part. The grout material is filled in the shear reinforcement member insertion hole, the grout material storage section, and the connecting pipe, and the grout material stored in the grout material supply section is stored. The first shear reinforcement member passage hole through which the shear reinforcement member passes is formed on the surface facing the opening of the shear reinforcement member insertion hole of the grout material reservoir section. The first shear reinforcement member passage hole is formed with a first fluid outflow prevention structure, and the shear reinforcement member is passed through the first shear reinforcement member passage hole, thereby inserting the shear reinforcement member insertion hole. The shear reinforcement member is fixed in the shear reinforcement member insertion hole by being inserted into the interior and then hardening the grout material.

  In the fixing method of the shear reinforcement member according to the present invention, the grout material storage portion is installed outside the opening portion of the shear reinforcement member insertion hole drilled upward, and the opening of the shear reinforcement member insertion hole in the grout material storage portion is opened. A first shear reinforcing member passage hole is formed on the surface facing the portion. For this reason, even when the grout material is filled in the first shear reinforcement member insertion hole and the grout material is stored in the grout material storage portion, the first shear reinforcement member passage hole passes through the first shear reinforcement member insertion hole. The reinforcing member can be inserted into the shear reinforcing member insertion hole. A first fluid outflow prevention structure is formed in the first shear reinforcement member passage hole. For this reason, even when the shear reinforcement member is passed through the first shear reinforcement member passage hole, it is possible to suppress the outflow of the grout material from the first shear reinforcement member passage hole. Accordingly, the grout material can be suitably filled in the shear reinforcement member insertion hole, and the shear reinforcement member can be sufficiently fixed to the structure without requiring an increase in the size of the apparatus such as the grout material storage means or a large amount of grout material.

  Further, in the fixing method of the shear reinforcement member of the present invention, the grout material supply unit capable of supplying the grout material to the grout material storage unit and the grout material storage unit are connected using a connecting pipe and stored in the grout material supply unit. The raised grout material has a higher head than the grout material stored in the grout material storage section. For this reason, since the grout material can be supplied to the grout material reservoir using the head difference, the shear reinforcement member is inserted into the shear reinforcement member while maintaining the amount of the grout material filled in the shear reinforcement member insertion hole. Can be inserted into the hole. Therefore, since the outflow of the grout material from the shear reinforcement member insertion hole is suppressed, the liquid level of the grout material at the uppermost portion of the shear reinforcement member insertion hole is suppressed.

  Here, the hermetic container is arranged so as to cover the first shear reinforcement member passage hole of the grout material storage part from the outside so that the grout material storage part and the inside of the hermetic container can communicate with each other. A second shear reinforcement member passage hole that allows the shear reinforcement member to pass therethrough is formed on the surface facing the reinforcement member passage hole, and the second fluid outflow prevention structure is provided in the second shear reinforcement member passage hole. It is formed, and the shear reinforcement member can be inserted into the shear reinforcement member insertion hole through the second shear reinforcement member passage hole and the first shear reinforcement member passage hole.

  When the compressed air is fed into the sealed container to increase the pressure in the container and the shear reinforcement member is inserted into the shear reinforcement member insertion hole, the grout material in the grout material reservoir is the first shear reinforcement member. Leakage into the sealed container through the passage hole can be mitigated. Thereby, the pressure of the grout material in the grout material storage part can be kept constant, and the liquid level of the grout material in the shear reinforcement member insertion hole is suppressed from lowering.

  The sealed container is provided with a relief valve that suppresses an increase in pressure in the container, and the relief valve can be opened so that the pressure inside the sealed container does not exceed a predetermined value. Thereby, the pressure rise in an airtight container is prevented and the pressure in a container can be maintained in a fixed range.

  By placing the grout material supply part at a position higher than the top of the shear reinforcement member insertion hole, the grout material stored in the grout material supply part has a higher head than the grout material stored in the grout material storage part. It can be set as the aspect which produces. Thus, by simply installing the grout material supply section higher than the top end of the shear reinforcement member insertion hole, the head level is utilized to suppress the drop in the liquid level of the grout material at the top of the shear reinforcement member insertion hole. be able to.

  It is good also as an aspect which connects the funnel-shaped container which is a grout material supply part, and the grout material storage part using the hose which is a connecting pipe.

  The fluid outflow prevention structure may have a check valve, a brush-like body, or a flexible deformation body that can suppress the outflow of the grout material.

  According to the fixing method of the shear reinforcement member according to the present invention, it is possible to reduce the outflow of the grout material from the upward shear reinforcement member insertion hole and to suppress the deterioration of the quality. Moreover, in the fixing method of the shear reinforcement member according to the present invention, the shear reinforcement member insertion hole is preferably filled with the grout material without requiring an increase in the size of the apparatus or a large amount of the grout material, and the shear reinforcement member is sufficiently provided with a concrete structure. Can be fixed on the body.

It is sectional drawing which shows the state which fixed the grout material storage tank to the concrete structure, and the airtight container, the grout material filling hose, and the funnel-shaped container are connected to this grout material storage tank. It is a perspective view which shows the shear reinforcement member inserted in the grout material storage tank attached to the construction surface, and the 1st through-hole. It is sectional drawing which shows the state with which the grout material was filled into the shear reinforcement member insertion hole drilled in the concrete structure, the grout material storage tank, the grout material filling hose, and the funnel-shaped container. It is sectional drawing which shows the state which has made the shear reinforcement member pass through a sealed container and a grout material storage tank, and has inserted in the shear reinforcement member insertion hole. It is sectional drawing which shows the state which inserted the shear reinforcement member in the shear reinforcement member insertion hole, and closed the shutter.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In each embodiment, portions having the same function are denoted by the same reference numerals, and redundant description may be omitted.

  In the fixing method of the shear reinforcement member of the present embodiment, as shown in FIG. 1, an upward shear reinforcement member insertion hole 2 is drilled in the existing concrete structure 1, and the shear reinforcement member is inserted in the upward shear reinforcement member insertion hole 2. A case where 3 is inserted and fixing is performed using the grout material G will be described.

(Concrete structure)
Examples of the existing concrete structure 1 include box culverts, tunnels, and other concrete walls. In the concrete structure 1 shown in FIG. 1, a predetermined space is formed above the construction surface 4 in the vicinity of the construction surface 4 in which the shear reinforcement member insertion hole 2 is drilled. The concrete structure 1 has an overhanging portion 6 that projects downward from the ceiling surface 5, and the lower surface of the overhanging portion 6 becomes the construction surface 4.

(Shear reinforcement member insertion hole)
In this embodiment, the bottomed shear reinforcement member insertion hole 2 is drilled from the construction surface 4 facing downward. The shear reinforcement member insertion hole 2 is formed to extend upward from the construction surface 4. The direction in which the shear reinforcement member insertion hole 2 extends may be vertically upward or may be extended obliquely upward. The construction surface may be a surface facing obliquely downward. The normal direction of the construction surface may intersect the vertical direction. In the vicinity of the opening of the shear reinforcement member insertion hole 2, an enlarged diameter hole 2a having a larger inner diameter than other portions is formed.

(Shear reinforcement member)
The shear reinforcement member 3 inserted into the shear reinforcement member insertion hole 2 is composed of a long threaded joint, and a male thread portion is formed over the entire length. When fixing the shear reinforcing member 3, the front end fixing body 7 is attached to the front end portion of the shear reinforcing member 3, and the rear end fixing body 8 is attached to the rear end portion. These fixing bodies are made of ceramics and have rust prevention properties.

(Grouting material storage tank)
After drilling the shear reinforcement member insertion hole 2, a grout material storage tank 9 (grout material storage part) for storing the grout material G is installed. The grout material storage tank 9 is, for example, a metal box-shaped container. An opening 9 b is formed in the top plate 9 a of the grout material storage tank 9. The opening 9 b is formed at a position overlapping the opening of the shear reinforcement member insertion hole 2. The volume of the grout material storage tank 9 is preferably larger than the volume of the shear reinforcement member insertion hole 2.

  The grout material storage tank 9 is fixed to the concrete structure 1 via a collar portion 9c. The collar portion 9 c is formed so as to project outward at the upper end of the grout material storage tank 9. The collar portion 9 c is screwed to the construction surface 4, and the grout material storage tank 9 is fixed to the concrete structure 1.

  As shown in FIG. 2, the top plate 9a of the grout material storage tank 9 is provided with a slide plate (lid) 9d for closing the opening 9b. 1 and 2, the slide plate 9d is disposed outward, the opening 9b is opened, and the inside of the shear reinforcing member insertion hole 2 and the inside of the grout material storage tank 9 are communicated. . When the slide plate 9d moves inward and the opening 9b is closed, the opening of the shear reinforcement member insertion hole 2 is closed. In FIG. 2, the grout material storage tank 9 is shown from the side where the slide plate 9d is disposed. In addition, in FIG. 2, illustration of the grout material filling hose 11 and the airtight container 12 which are mentioned later is abbreviate | omitted.

  The bottom plate 9e of the grout material storage tank 9 is formed with a first through hole 9f (first shear reinforcing member passage hole) through which the shear reinforcement member 3 passes, and the first through hole 9f has a fluid outflow prevention. A rubber plate 10 which is an elastic member constituting the structure is attached. The rubber plate 10 has a plate shape, and the shape viewed from the front is substantially the same shape as the first through hole 9f. The rubber member 10 is disposed in the entirety of the first through hole 9f, and the first through hole 9f is closed by the rubber plate 10.

  A cut portion (not shown) cut in the thickness direction is formed at the center position of the rubber plate 10. Since the cut portion is formed, the rubber plate 10 can be easily deformed. By pressing the shear reinforcement member 3 against the cut portion, the cut portion of the rubber plate 10 is deformed and opened, and the shear reinforcement member 3 can pass through the opening portion. When the shear reinforcement member 3 is not passing, the cut portion is closed to prevent the grout material stored in the grout material storage tank 9 from flowing out from the first through hole 9f.

  As shown in FIG. 1, a grout material supply port 9 h is provided in the side plate 9 g of the grout material storage tank 9. A grout material filling hose 11 (communication pipe) is connected to the grout material supply port 9h. The grout material filling hose 11 is made of a flexible material. A metal pipe may be used as the connecting pipe.

  Further, a packing is attached to the opening portion of the grout material storage tank 9 in order to prevent leakage of the grout material. For example, the packing is disposed corresponding to the gap between the top plate 9 a of the grout material storage tank 9 and the construction surface 4. Further, the packing is arranged corresponding to the gap between the grout material supply port 9 h and the grout material filling hose 11.

(Sealed container)
A hermetic container 12 is installed below the grout material storage tank 9. The sealed container 12 is, for example, a metal box-shaped container. The sealed container 12 is disposed so as to cover the first through-hole 9f of the grout material storage tank 9 from the outside, and the inside of the closed container 12 and the inside of the grout material storage tank 9 can communicate with each other.

  The sealed container 12 is preferably provided so as to be detachable from the grout material storage tank 9. The hermetic container 12 is, for example, screwed to the grout material storage tank 9. Thereby, according to construction conditions, necessity, etc., the airtight container 12 can be attached or detached.

  The bottom plate 12a of the sealed container 12 is formed with a second through hole 12b (second shear reinforcing member passage hole) through which the shear reinforcing member 3 passes, and the second through hole 12b has a fluid outflow prevention structure. A rubber plate 13 which is an elastic member to be configured is attached. The rubber plate 13 has a plate shape, and the shape viewed from the front is substantially the same as that of the second through hole 12b. The rubber member 13 is disposed in the entire second through hole 12b, and the second through hole 12b is closed by the rubber plate 13.

  A cut portion (not shown) cut in the thickness direction is formed at the center position of the rubber plate 13. Since the cut portion is formed, the rubber plate 13 can be easily deformed. By pressing the shear reinforcement member 3 against the cut portion, the cut portion of the rubber plate 13 is deformed and opened, and the shear reinforcement member 3 can pass through the opening portion. Further, when the shear reinforcement member 3 is not passing, the cut portion is closed to prevent the grout material stored in the sealed container 12 from flowing out from the second through hole 12b.

  The sealed container 12 is provided with a vent 12c. A blower 14 is connected to the vent 12c. By sending compressed air into the sealed container 12 using the blower 14, the pressure in the sealed container 12 can be increased. The sealed container 12 is provided with a relief valve (not shown) so that the pressure in the container 12 does not exceed a predetermined value. A spring-type safety valve can be used as the relief valve. Instead of the relief valve, a rupture disk that breaks at a predetermined pressure may be used.

  A grout material storage tank 9 is connected to one end side of the grout filling hose 11, and a funnel-shaped container 15 (grout material supply unit) is connected to the other end side of the grout filling hose 11. The funnel-shaped container 15 is a container that stores the grout material supplied to the grout material storage tank 9. The funnel-shaped container 15 is preferably disposed at a position higher than the top end 2a of the shear reinforcement member insertion hole 2.

(Arrangement of shear reinforcing member insertion hole, first through hole, and second through hole)
Grout material storage so that the straight line passing through the center of the opening 9b of the grout material storage tank 9 and the first through hole 9f and the straight line passing through the center of the shear reinforcement member insertion hole 2 are arranged on the same straight line. A tank 9 is installed. The sealed container 12 is installed such that a straight line passing through the centers of the first through hole 9f and the second through hole 12b and a straight line passing through the center of the shear reinforcement member insertion hole 2 are arranged on the same straight line. ing. The opening 9b of the grout material storage tank 9, the first through hole 9f, and the second through hole 12b of the sealed container 12 are sized to allow the fixing members 7 and 8 to pass therethrough.

(Installation of narrow tubes for air venting)
In the shear reinforcement member insertion hole 2, a fine tube 16 for venting air is installed. For example, a rubber tube can be used as the air venting narrow tube 16. The narrow tube 16 extends downward from the top end 2 a of the shear reinforcement member insertion hole 2 and is disposed over the entire length of the shear reinforcement member insertion hole 2. The thin tube 16 is disposed so as to pass through the opening 9 b of the grout material storage tank 9 and pass through the inside of the grout material storage tank 9. The thin tube 16 is disposed so as to pass through the first through hole 9f, pass through the inside of the sealed container 12, pass through the second through hole 12b, and continue to the outside of the sealed container 12.

(Filling grout material)
After the grout material storage tank 9, the closed container 12, the grout material filling hose 11, the funnel-shaped container 15 and the thin tube 16 are installed, the grout material G is filled. FIG. 3 shows a state after the thin tube 16 is extracted after the grout material G is filled. As the grout material G, a fluid cement-based material or the like can be used. The fluidity in the grout material G is such that, for example, the JA funnel flow time is about 15 to 30 seconds. Furthermore, as the grout material G, in order to ensure the integrity of the shear reinforcement member 3 and the grout material G in the process when the grout material G is cured, the grout material G is non-shrinkable, and its expansion / contraction rate In the range of about 0.14 to 0.23% is preferably used.

  The grout material G is supplied into the funnel-shaped container 15. The grout material G supplied to the funnel-shaped container 15 passes through the grout material filling hose 11 and flows into the grout material storage tank 9. When the filling of the grout material G is continued, the grout material storage tank 9 is filled with the grout material G, and the shear reinforcement member insertion hole 2 is filled with the grout material G. At this time, the rubber plate 10 is provided in the first through hole 9f formed in the bottom surface 9e of the grout material storage tank 9, and the cut portion in the rubber plate 10 remains closed. For this reason, the outflow of the grout material G from the grout material storage tank 9 is prevented.

  The grout material G is filled so that the liquid level (L1) of the grout material G stored in the funnel-shaped container 15 is higher than the top end 2a (L2) of the shear reinforcement member insertion hole 2. Thereby, a head difference (Δh) can be provided between the funnel-shaped container 15 and the grout material storage tank 9. In this state, the grout material G is filled up to the top end 2 a of the shear reinforcement member insertion hole 2. When the grout material is filled, the air in the shear reinforcement member insertion hole 2 passes through the narrow tube 16 (see FIG. 1) and is exhausted to the outside of the sealed container 12. The grout material G is substantially filled in the shear reinforcement member insertion hole 2 and almost no air remains.

  Further, when the grout material G is filled, the inside of the sealed container 12 is pressurized by the blower 14 and is maintained at a predetermined pressure. After the filling of the grout material G is completed, the air vent tubule 16 is taken out from the shear reinforcement member insertion hole 2, the grout material storage tank 9, and the sealed container 12 to the outside.

  When the filling of the grout material G is completed, the shear reinforcement member 3 is inserted into the shear reinforcement member insertion hole 2. Further, when inserting the shear reinforcement member 3 into the shear reinforcement member insertion hole 2, the distal end portion of the shear reinforcement member 3 is pressed against the cut portion of the rubber plate 13 in the sealed container 12, and the shear reinforcement member 3 is pushed in as it is.

  When the shear reinforcement member 3 is further pushed in, the distal end portion of the shear reinforcement member 3 passes through the sealed container 12, and the distal end portion of the shear reinforcement member 3 is pressed against the cut portion of the rubber plate 10 of the grout material storage tank 9. . At this time, a slight opening may be formed due to the deformation of the cut portion in the rubber plate 10, and the grout material in the grout material storage tank 9 may slightly leak from this opening. However, since there is a head difference (Δh) between the grout material G stored in the grout material storage tank 9 and the grout material G stored in the funnel-shaped container 16, the closed container 12 from the grout material storage tank 9. The grout material G can be supplied to the grout material storage tank 9 even if the internal leakage increases. Therefore, the state in which the inside of the shear reinforcement member insertion hole 2 is filled with the grout material G is sufficiently maintained, so that the liquid level of the grout material in the shear reinforcement member insertion hole 2 does not decrease, and the shear reinforcement member insertion is performed. Intrusion of air into the hole 2 can be prevented.

  In addition, when the grout liquid level of the funnel-shaped container 15 falls, the grout liquid level of the funnel-shaped container 15 is raised by supplementing the funnel-shaped container 15 with a grout material. Moreover, the grout material may be replenished to the funnel-shaped container 15 according to the leakage state of the grout material from the first through hole 9f.

  Subsequently, the shear reinforcement member 3 is pushed in, and the entire shear reinforcement member 3 is inserted into the shear reinforcement member insertion hole 2. At this time, the rear end portion of the shear reinforcement member 3 is in a state of projecting into the enlarged diameter hole 2 b in the shear reinforcement member insertion hole 2. FIG. 4 shows a state in the middle of inserting the shear reinforcement member 3 into the shear reinforcement member insertion hole 2.

  The shear reinforcement member 3 is inserted into the shear reinforcement member insertion hole 2 until the rear end fixing member 8 enters the enlarged diameter hole 2 b in the shear reinforcement member insertion hole 2. FIG. 5 shows a state where the shear reinforcement member 3 is inserted into the shear reinforcement member insertion hole 2. In this way, the rear end fixing body 8 attached to the rear end portion of the shear reinforcement member 3 is accommodated in the enlarged diameter hole 2b. Then, the slide plate 9d is moved to close the opening 9b of the top plate 9a of the grout material storage tank 9, and the opening of the shear reinforcement member insertion hole 2 is closed. Thereafter, a drain cock (not shown) provided in the grout material storage tank 9 is opened, and the grout material stored in the grout material storage tank 9 is discharged from the grout material storage tank 9. The discharged grout material is within the usable time and can be used for the other shear reinforcement member insertion holes 2 when the predetermined fluidity is maintained.

  Thereafter, with the opening 9b of the grout material storage tank 9 closed by the slide plate 9d, the grout material storage tank 9 is removed leaving the slide plate 9d and the guide member 9i (FIG. 2), and the shear reinforcement member insertion hole The grout in 2 is cured for a predetermined period, for example, about one day. Furthermore, after the curing period has elapsed, the slide plate 9d and the guide member 9i are removed, and the surface of the concrete structure 1 is appropriately cleaned. Thus, fixing of the shear reinforcement member 3 is completed.

  Thus, in the fixing method of the shear reinforcement member according to this embodiment, the first through hole 9f is formed in the bottom plate 9e in the grout material storage tank 9 installed outside the opening of the shear reinforcement member insertion hole 2. Has been. For this reason, even when the grout material G is filled in the shear reinforcement member insertion hole 2 and the grout material G is stored in the grout material storage tank 9, the first through hole 9f is passed through to reinforce the shear. The member 3 can be inserted into the shear reinforcement member insertion hole 2. A rubber plate 10 is provided in the first through hole 9f. For this reason, even when the shear reinforcing member 3 is passed through the first through hole 9f, the grout material G is prevented from flowing out of the first through hole 9f. Therefore, without increasing the size of the grout material storage tank 9 or the like or a large amount of grout material G, the shear reinforcement member insertion hole 2 is preferably filled with the grout material G, and the shear reinforcement member 3 is made into the concrete structure 1. It can be sufficiently fixed.

  Further, a rubber plate 10 is provided in the first through hole 9f, and when the shear reinforcement member 3 passes through the cut portion in the rubber plate 10, the cut portion is opened so that the shear reinforcement member 3 can pass therethrough. Become. For this reason, the shear reinforcement member 3 can be inserted while suitably preventing the grout material G from flowing out of the grout material storage tank 9.

  Moreover, since the head difference is provided between the grout material of the grout material storage tank 9 and the grout material of the funnel-shaped container 15, the outflow of the grout material from the upward shear reinforcement member insertion hole 2 can be suppressed. The upward construction can be realized by using the fluid grout material G. Therefore, by using the grouting material G having fluidity, the construction cost can be reduced and the burden on the operator can be reduced.

  Further, the funnel-shaped container 15 is disposed higher than the top end 2a of the shear reinforcement member insertion hole 2, filled with the grout material G using gravity, and the liquid level of the grout material G in the shear reinforcement member insertion hole 2 is filled. Since the position of (L1) is maintained, it is not necessary to use a special grout material filling device. As a result, it becomes easy to properly maintain the pressure of the grout material G, so that damage to the packing provided in the grout material storage tank 9 can be prevented.

  Moreover, when the volume of the grout material storage tank 9 is larger than the volume of the shear reinforcement member insertion hole 2, when the shear reinforcement member 3 is inserted, the grout material G flows out from the first through hole 9f, The drop in the liquid level of the grout material G in the shear reinforcement member insertion hole 2 can be alleviated. By preventing an abrupt drop in the liquid level of the grout material G, the inflow of air into the shear reinforcement member insertion hole 2 can be prevented, and a deterioration in quality can be prevented.

  Further, according to the fixing method of the shear reinforcing member of the present embodiment, the shear reinforcing member insertion hole 2, the opening 9b, the first through hole 9f, and the second through hole 12b are arranged on the same straight line. In addition, since the grout material storage tank 9 and the hermetic container 12 are positioned and arranged, after the grout material is filled, the position of the second through hole 12b becomes a mark. The operation of inserting the shear reinforcement member 3 becomes easy.

  Further, when the outer diameters of the fixing members 7 and 8 attached to the shear reinforcement member 3 are large, it is necessary to increase the inner diameter of the first through hole 9f according to the size, and the shear reinforcement member There is a risk that the amount of grout leakage during insertion will increase. According to the fixing method of the shear reinforcing member of the present embodiment, the sealed container 12 is installed outside the first through hole 9f, and the pressure in the sealed container 12 can be maintained high by blowing air through the blower 14. Therefore, the outflow amount of the grout material G from the first through hole 9f can be suppressed. Therefore, it is possible to suitably suppress a decrease in the liquid level of the grout material G in the shear reinforcement member insertion hole 2. As a result, in the upward construction, it is possible to reduce the burden on the operator, prevent the inflow of air into the shear reinforcement member insertion hole 2, and prevent deterioration in quality.

  Moreover, according to the fixing method of the shear reinforcement member of this embodiment, since the relief valve (pressure release) is installed in the sealed container 12, it is possible to prevent the pressure in the sealed container 12 from becoming too high. . If the pressure in the sealed container 12 becomes too high, the air in the sealed container 12 may flow into the grout material storage tank 9 through the first through hole 9f. In the method of this embodiment, the grout material is used. Inflow of air into the storage tank 9 is prevented, and inflow of air into the shear reinforcement member insertion hole 2 is also prevented.

  The preferred embodiment of the present invention has been described above, but the present invention is not limited to the above embodiment. For example, in the above embodiment, ceramics are used as the fixing members 7 and 8, but a metal fixing member or the like can also be used. In addition, the shape can be various. For example, a fixing member made of metal or the like may be joined to the screw joint, or a screw rod may be attached to the end of the reinforcing rod by friction welding, and the fixing member may be joined to the screw rod. Alternatively, the shape of the fixing body may be a plate-shaped member or a structure in which the fixing plate and the nut are integrated. When a metal fixing member is used, a cover thickness for rust prevention is required, but the cover thickness can be secured with a filled grout.

  Moreover, in the said embodiment, while providing the external thread part in the both ends of the shear reinforcement member 3, the structure which formed the internal thread part in the fixing body may be sufficient. On the other hand, it can also be set as the aspect which forms an internal thread part in the both ends of the shear reinforcement member 3, and forms an external thread part in a fixing body. Alternatively, it is possible to form an external thread part and an internal thread part at both ends of the shear reinforcement member 3 and form an internal thread part and an external thread part on the fixing body corresponding to these.

  Furthermore, in the said embodiment, although the grout material storage tank 9 is attached by screwing, it can also be set as the aspect attached by other means, such as a suction cup and an anchor bolt. Moreover, in the said embodiment, although the rubber plates 10 and 13 are used as a fluid outflow prevention structure which prevents the outflow of the grout material G from the 1st through-hole 9h and the 2nd through-hole 12b, a rubber plate is used. Multiple sheets may be used in piles. Alternatively, instead of the rubber plate 10, a check valve, a brush (brush-like body), a sponge (a flexible deformation body), or the like can be used. As the fluid outflow prevention structure, a material having elasticity and water-stopping property can be suitably used. Here, the water-stopping property is not limited to the property of stopping water, but is sufficient to have the property of stopping a slurry fluid such as a grout material.

  Moreover, in each said embodiment, although only the 1st 1st through-hole 9f is formed in the bottom plate 9e of the grout material storage tank 9, it can also be set as the aspect which forms these several. By forming a plurality of through holes, any through hole or the like is arranged on the extension line of the shear reinforcement member insertion hole 2 without accurately forming the position of the through hole. Therefore, since it is not necessary to form the through hole with high accuracy, the formation of the grout material storage tank 9 can be facilitated.

  Further, in the above embodiment, the lid members of the rubber plates 10 and 13 are used in order to prevent the grout material G from flowing out of the through holes 9f and 12b, but before and after inserting the shear reinforcement member 3. Further, a water stop sheet can be attached to the outside of the grout material storage tank 9 to prevent the grout material G from flowing out of the through holes 9f and 12b. At this time, by setting the grout material storage tank to be made of steel and using a water stop sheet with a magnet as the water stop sheet, the water stop sheet can be easily attached to the grout material storage tank. Moreover, when forming a some through-hole etc., it is suitable to affix this water stop sheet | seat on the part of the through-hole which penetrates the shear reinforcement member 3. FIG.

  Further, in the above embodiment, only one shear reinforcement member 3 is inserted into the shear reinforcement member insertion hole 2, but the shear reinforcement member obtained by connecting the plurality of divided shear reinforcement member divided portions with a coupler is sheared. It can also be set as the aspect inserted in the reinforcement member insertion hole 2. FIG. In this way, by forming a shear reinforcement member by connecting a plurality of shear reinforcement member split portions, the shear reinforcement member can be easily inserted into the shear reinforcement member insertion hole 2 even when the work area is a narrow place. Can be inserted into.

  Moreover, in the said embodiment, although the funnel-shaped container 15 is used as a grout material supply part, you may use containers of other shapes, such as a box shape. Moreover, in the said embodiment, although the funnel-shaped container 15 which is a grout material supply part is arrange | positioned in the position higher than the top end 2a of the shear reinforcement member insertion hole 2, the head difference is produced, for example, a pump A head difference may be generated between the grouting reservoir 9 and the grouting tank 9 by increasing the pressure of the grouting material. Further, the head difference may be generated by increasing the pressure of the grout material using an accumulator. When there is no predetermined space in which the funnel-shaped container 15 can be disposed above the construction surface 4, it is preferable to generate a head difference by using a booster.

  In the said embodiment, although the airtight container 12 is installed so that the 1st through-hole 9f of the grout material storage tank 9 may be covered, the method which does not use the airtight container 12 may be used. A part of the sealed container 12 is preferably formed of a transparent member such as acrylic. Thereby, since the inside of the airtight container 12 can be visually recognized, the leak condition of the grout material can be easily confirmed.

DESCRIPTION OF SYMBOLS 1 ... Concrete structure 2 ... Shear reinforcement member insertion hole 2a ... Top end 2b ... Diameter expansion hole 3 ... Shear reinforcement member 4 ... Construction surface 5 ... Ceiling surface 6 ... Overhang | projection part 7 ... Tip fixing body 8 ... Rear end fixing body 9 ... Grout material storage tank (grouting material storage part)
9a ... Top plate 9b ... Opening 9c ... Collar 9d ... Slide plate (lid)
9e: bottom plate 9f: first through hole (first shear reinforcing member passage hole)
9g ... side plate 9h ... grout material supply port 9i ... guide member 10 ... rubber plate (first fluid outflow prevention structure)
11 ... Grout filling hose (connecting pipe)
12 ... Airtight container 12a ... Bottom plate 12b ... 2nd through-hole (2nd shear reinforcement member passage hole)
12c ... Vent 13 ... Rubber plate (second fluid outflow prevention structure)
14 ... Blower (pressure part)
15 ... funnel-shaped container 16 ... narrow tube for venting

Claims (7)

A fixing method for a shear reinforcing member in which an existing concrete structure is drilled upward from one side with a bottomed shear reinforcing member insertion hole, and the shear reinforcing member is inserted into the shear reinforcing member insertion hole and fixed with a grout material. In
In the existing concrete structure, the shear reinforcement member insertion hole is drilled upward,
A grout material storage part capable of storing a grout material having fluidity is installed so as to cover the opening of the shear reinforcement member insertion hole,
Connect the grout material supply part capable of supplying the grout material to the grout material storage part and the grout material storage part using a connecting pipe,
Supplying the grout material from the grout material supply unit, filling the shear reinforcement member insertion hole, the grout material storage unit, and the connecting pipe with the grout material,
In the grout material stored in the grout material supply unit, a head higher than the grout material stored in the grout material storage unit is produced,
A surface facing the opening of the shear reinforcement member insertion hole of the grout material storage part is formed with a first shear reinforcement member passage hole through which the shear reinforcement member passes, and the first shear reinforcement member passage. A first fluid outflow prevention structure is formed in the hole,
Inserting the shear reinforcement member into the shear reinforcement member insertion hole through the first shear reinforcement member passage hole;
Thereafter, the shear reinforcement member is fixed to the shear reinforcement member insertion hole by curing the grout material. A closed container is arranged so as to cover the first shear reinforcing member passage hole of the grout material storage part from the outside, and the grout material storage part and the inside of the closed container can be communicated with each other.
A second shear reinforcement member passage hole that allows the shear reinforcement member to pass therethrough is formed on a surface of the sealed container that faces the first shear reinforcement member passage hole, and the second shear reinforcement member passage hole is formed. Is formed with a second fluid outflow prevention structure,
2. The shear reinforcement member is inserted into the shear reinforcement member insertion hole through the second shear reinforcement member passage hole and the first shear reinforcement member passage hole. Fixing method of shear reinforcement member. By sending compressed air into the sealed container to increase the pressure in the container;
When the shear reinforcement member is inserted into the shear reinforcement member insertion hole, the grout material of the grout material reservoir passes through the first shear reinforcement member passage hole and leaks into the sealed container. The method for fixing a shear reinforcing member according to claim 2, wherein this is mitigated. The sealed container is provided with a relief valve that suppresses an increase in pressure in the container,
The method for fixing a shear reinforcement member according to claim 2 or 3, wherein the relief valve is opened so that the pressure inside the sealed container does not exceed a predetermined value.   The grout material stored in the grout material storage unit is arranged in the grout material stored in the grout material supply unit by disposing the grout material supply unit at a position higher than the top end of the shear reinforcement member insertion hole. The method of fixing a shear reinforcement member according to claim 1, wherein a higher head is generated.   The shear reinforcement according to any one of claims 1 to 5, wherein the funnel-like container that is the grout material supply unit and the grout material storage unit are connected using a hose that is the connecting pipe. Fixing method of member.   The said fluid outflow prevention structure has a non-return valve which can suppress the outflow of the said grout material, a brush-like body, or a deformation | transformation body which has a softness | flexibility, It is any one of Claims 1-6 characterized by the above-mentioned. Fixing method of the shear reinforcement member.

Images