JP5183456B2 - Fixing structure of expansion joint for concrete structure, fixing method thereof and fixing member thereof - Google Patents

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixing structure for an expansion joint for a concrete structure, a fixing method thereof, and a fixing member thereof, and is flexibly applied to a joint portion of a concrete structure such as a water channel, a water treatment facility, a tunnel, and a common groove constructed with concrete. A flexible expansion joint is installed to prevent water damage and relative displacement to prevent damage to the structure, and is particularly suitable for repair.

  In the joints of walls such as waterways, water tanks or underground gutters built in the ground such as joint grooves, which are concrete structures constructed with concrete, water is stopped inside and outside and the concrete structures on both sides of the walls are unequal. It is necessary to allow expansion and contraction of the wall due to subsidence, earthquake displacement, temperature change, etc. Flexible expansion joints such as rubber and synthetic resin water stop plates are provided inside the concrete structure. A stiffening water structure is adopted.

As such a flexible water-stopping structure, for example, there is a water-stopping structure disclosed in Patent Document 1, and, as shown in FIG. 7, U is placed in the middle of the joint material 1 in which an elastic material and one or more stress materials are embedded. While forming the groove-shaped extra length part 2 of a type | mold, and forming the joint material 1 by forming the latching parts 3 and 3 on both sides, the recessed part 6 formed in the joint part 5 between the concrete structures 4 and 4 The extra length portion 2 of the joint material 1 is accommodated in the joint member 1, and the engaging portions 3 and 3 on both sides are attached via anchor bolts 7 and presser plates 8 embedded and fixed in the concrete structures 4 and 4, respectively. Thereby, the protrusion of the joint material 1 to the inside of the concrete structures 4 and 4 is eliminated, and resistance to flow in the case of using a water channel is prevented.
JP 2000-64446 A

  Such a water stop structure is constructed not only for newly constructing a concrete structure, but also for providing seismic reinforcement by being provided on an existing concrete structure, or for replacement and repair.

  However, if this water-stopping structure is to be applied to an existing concrete structure such as a culvert, it is necessary to drill anchor bolts 7 for fixing the joint material 1 in the concrete structures 4 and 4 and attach them to the concrete structure. In some cases, it hits 4 or 4 rebars, and it is often necessary to attach the anchor bolt 7 by shifting the drilling position.

  For this reason, it is necessary to measure the bolt pitch at the site when the anchor bolt 7 has been attached, and to manufacture the presser plate 8 and joint material 1 according to the result, and to perform drilling. However, there is a problem that the construction period is long.

  The present invention has been made in view of the problems of the prior art, and a concrete structure in which necessary members can be manufactured in advance and can be easily constructed regardless of the mounting position of the anchor bolt. An object of the present invention is to provide a fixing structure for an expansion joint for an object, a fixing method thereof, and a fixing member thereof.

  In order to solve the above-mentioned problem, the expansion structure for a concrete structure expansion joint according to claim 1 of the present invention includes a flexible expansion joint disposed across a joint between concrete structures, and the expansion joint of the expansion joint. An intermediate plate-like portion is fixed by a pressing member that is pressed against the adhesive portion at both ends and pressed between the concrete structures and anchor bolts attached to the concrete structure, and formed on both sides of the intermediate plate-like portion. And a fixing member that presses the presser member at the front end portion of both side plate portions and presses against the attachment portion. It is.

  According to a second aspect of the expansion joint for concrete structure of the present invention, in addition to the structure of the first aspect, the pressing member is formed in a lip groove shape.

  Furthermore, the fixing structure of the expansion joint for a concrete structure according to claim 3 of the present invention, in addition to the configuration according to claim 1 or 2, overlies the presser member at the tip end portions of the side plate portions of the fixing member. This is characterized in that it is formed by forming a locking projection for locking.

  According to a fourth aspect of the present invention, there is provided a fixing structure for an expansion joint for a concrete structure according to any one of the first to third aspects, in addition to the presser at an intermediate portion between both side plate portions of the fixing member. The present invention is characterized in that an intermediate presser arm portion that presses the member is provided.

  Furthermore, the fixing method of the expansion joint for concrete structures according to claim 5 of the present invention is to fix the flexible expansion joint arranged across the joint between the concrete structures to the concrete structure, After holding the holding member on the adhesive joint of the expansion joint and sandwiching it with the concrete structure, the intermediate plate-shaped part of the fixing member is temporarily attached to the anchor bolt attached to the concrete structure outside the adhesive part. The fixing member is rotated and moved so that the base end portions of the both side plate portions formed on both sides of the intermediate plate-like portion are brought into contact with the concrete structure, and the presser member is held by the front end portions of the both side plate portions. The fixing member is fastened to the anchor bolt.

  The expansion member for a concrete structure expansion joint according to claim 6 of the present invention includes an intermediate plate-like portion inserted and fixed by an anchor bolt, and tip portions of both side plate portions on both sides of the intermediate plate-like portion. A presser arm portion for pressing the presser member, and a base end portion of both side plate portions provided with an elastic contact portion that is flush with the concrete structure and is flush with the intermediate plate-like portion. To do.

  Furthermore, the fixing member of the expansion joint for a concrete structure according to claim 7 of the present invention is the intermediate member of the intermediate portion of the both side plate portions in addition to the side plate portions in addition to the structure of the sixth aspect. The presser arm portion is provided and configured.

  According to the fixing structure of the expansion joint for a concrete structure according to claim 1 of the present invention, the flexible expansion joint disposed across the joint between the concrete structures, and the flanges at both ends of the expansion joint Both side plates formed on both sides of the intermediate plate-like portion by fixing the intermediate plate-like portion with a holding member that is pressed against the landing portion and pressed between the concrete structure and an anchor bolt attached to the concrete structure. And a fixing member that presses the pressing member at the tip end portions of both side plate portions and presses the attachment portion, so that the flexible expansion joint of the flexible expansion joint is provided. Hold the pressing member against the anchoring part, hold the pressing member at the tip of the two side plate parts of the fixing member where the intermediate plate-like part is fixed to the anchor bolt, and concrete the two base end parts of the both side plate parts For structures As a result, regardless of the position of the anchor bolt, it is possible to fix the expansion joint by pressing the holding member at a predetermined position by dispersing the load and making the surface pressure uniform, and also displace to the concrete structure. Even when this occurs, a uniform fixed state can be maintained by utilizing the elastic deformation of both side plate portions of the fixing member.

  As a result, flexible expansion joints, presser members, and fixing members can be manufactured even before the anchor bolt mounting position is determined, and the construction is easy and can be replaced and repaired in a short time.

  Moreover, according to the fixing structure of the expansion joint for concrete structures according to claim 2 of the present invention, since the pressing member is configured in a lip groove shape, the rigidity can be increased as compared with the plate-like case. It is possible to reduce the weight.

  Further, according to the fixing structure of the expansion joint for concrete structure according to claim 3 of the present invention, the locking projection portion that gets over the pressing member and locks to the tip end portions of the both side plate portions of the fixing member. Since it is formed and configured, it can be surely pressed by getting over the locking projection on the outside of the pressing member, and it can be securely pressed by preventing it from coming off due to the displacement of the concrete structure. .

  According to the fixing structure of the expansion joint for concrete structure according to claim 4 of the present invention, an intermediate presser arm portion that press-contacts the presser member is provided at the intermediate portion of the both side plate portions of the fixing member. Therefore, the expansion joint can be fixed by further pressing the pressing member at a predetermined position by dispersing the load and uniforming the surface pressure.

  Furthermore, according to the fixing method of the expansion joint for concrete structures according to claim 5 of the present invention, when fixing the flexible expansion joint arranged across the joint between the concrete structures to the concrete structure. An intermediate plate-like portion of a fixing member attached to an anchor bolt attached to the concrete structure outside the fitting portion after a pressing member is applied to the fitting portion of the expansion joint and sandwiched between the concrete structures. Is fixed temporarily, and this fixing member is rotated or moved so that the base end portions of both side plate portions formed on both sides of the intermediate plate-like portion are brought into contact with the concrete structure, and the presser member at the front end portions of the both side plate portions. Since the fixing member is fastened to the anchor bolt, the holding member is applied to the attachment portion of the flexible expansion joint, and the intermediate plate-shaped portion of the fixing member is temporarily fixed to the anchor bolt. The fixing member is rotated or moved around the anchor bolt to hold the pressing member at the two tip portions of the both side plate portions, and the two base end portions of the both side plate portions are applied to the concrete structure. By tightening, the expansion joint can be fixed in a state where the load is distributed at a predetermined position and the surface pressure is made uniform, regardless of the position of the anchor bolt, and it is displaced to the concrete structure. Even when this occurs, a uniform fixed state can be maintained by utilizing the elastic deformation of both side plate portions of the fixing member.

  As a result, flexible expansion joints, presser members, and fixing members can be manufactured even before the anchor bolt mounting position is determined, and the temporary fixing member can be rotated, moved, and tightened for easy installation. Can be replaced or repaired.

  Moreover, according to the fixing member of the expansion joint for a concrete structure according to claim 6 of the present invention, the intermediate plate-like portion inserted and fixed by the anchor bolt is provided, and the both side plate portions on both sides of the intermediate plate-like portion are provided. Since it has a presser arm part that presses the presser member at the distal end part, and has an elastic contact part that makes the same surface as the intermediate plate part at the base end part of the both side plate parts and comes into contact with the concrete structure, It is possible to disperse the load and press the holding member at a total of five locations, one in the intermediate plate-like portion that is tightened with the anchor bolts, two in the tip portion of the both side plate portions, and two in the base end portion. Construction can be easily performed by temporarily fixing and rotating the shaped portion, or moving and tightening.

  Furthermore, according to the fixing member of the expansion joint for concrete structure according to claim 7 of the present invention, the presser arm portion is provided with an intermediate presser arm portion in the middle portion of both side plate portions in addition to the side plate portions. Therefore, the pressing member at a predetermined position can also be pressed by the intermediate pressing arm portion, and the expansion joint can be fixed by further distributing the load to make the surface pressure uniform and pressing.

Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.
1 to 4 relate to an embodiment of a fixing structure of an expansion joint for a concrete structure and a fixing member thereof according to the present invention, FIG. 1 is a partially enlarged perspective view, FIG. 2 is an overall schematic cross-sectional view, FIG. FIG. 4 is an explanatory view exaggeratingly showing the elastic deformation state of the pressing member, and FIG. 4 is an explanatory view exaggeratingly showing the elastic deformation state of the fixing member.

  In this concrete structure expansion joint fixing structure (hereinafter simply referred to as a fixed structure) 10, for example, as shown in FIG. 2, it is constructed so as to straddle the joint portions 12 of the existing concrete structures 11, 11. And a flexible material such as rubber or synthetic resin that allows the concrete structure 11, 11 on both sides of the joint 12 to expand and contract due to unequal subsidence, displacement during an earthquake, temperature change, etc. This is characterized by the fixing of the flexible expansion joint 13, and it can easily cope with the displacement of the bolt pitch of the newly installed anchor bolt 14 to prevent interference with the reinforcing bar, etc., and distribute the tightening force And can be fixed uniformly.

  A flexible expansion joint 13 used in the fixing structure 10 includes a folded portion 13a folded in a substantially Ω shape at a middle portion in the width direction of a long band, and flat plate-like attachment portions at both width direction ends. 13b is provided and is made of an elastic member such as rubber or synthetic resin, and one or more reinforcing members are embedded as required.

  In this fixed structure 10, the fastening portions 13 b and 13 b of the expansion joint 13 are disposed so as to straddle the joint portions 12 of the concrete structures 11 and 11, but polyester or the like is provided on the joint portions 12 of the concrete structures 11 and 11. The expansion joint 13 is installed thereon, and a protective cover 16 is provided so as to cover the entire upper part of the expansion joint 13 up to the staking portions 13b and 13b.

  In this fixing structure 10, as shown in FIGS. 1 and 2, a presser member 17 applied to the attachment portion 13 b of the expansion joint 13 is used, and a substantially U-shaped lip groove shape having an upper opening is used. For example, the groove width is 50 mm, the groove height is 25 mm, the thickness is 2 mm, and the lip width is 10 mm. The cross-sectional shape of the lip groove shape allows the weight to be reduced to 1 / 3.73 while ensuring the same rigidity as compared with a flat plate shape having a width of 50 mm and a thickness of 16.7 mm. .

  When it is necessary to further increase the rigidity, a flat plate may be interposed on the groove bottom.

  In the fixing structure 10 using such a pressing member 17, as shown in FIGS. 1 and 2, the pressing member 17 is not fixed directly to the concrete structures 11, 11 with the anchor bolts 14, but on the outside of the expansion joint 13. The fixing member 18 is tightened via the anchor bolt 14 to be implanted, and the presser member 17 is fixed via the fixing member 18.

  As shown in FIGS. 1 and 2, the fixing member 18 includes an intermediate plate-like portion 18a that is inserted and fixed by an anchor bolt, and an attachment hole 18b for the anchor bolt 14 is formed. The intermediate plate-like portion 18a Both side plates 18c and 18c are formed by bending so as to bend both sides inward. A presser arm portion 18d for pressing the presser member 17 is formed at the leading end of each of the side plate portions 18c so as to protrude, and the base plate portion of each side plate portion 18c is spaced from the intermediate plate-like portion 18a. An elastic contact portion 18f that protrudes inward so as to be in contact with the concrete structure 11 is formed integrally.

  In this fixing member 18, the protruding length of the presser arm portion 18 d is set to a length corresponding to the groove width of the presser member 17, and a locking projection 18 e is formed at the distal end portion of the presser arm portion 18 d. The stopper protrusion 18e can be locked in a state where the stopper protrusion 18e is positioned outside the pressing member 17 (a state where the pressing member 17 is passed over). Further, in this fixing member 18, when the distance from the lower surface of the intermediate plate portion 18a to the lower surface of the presser arm portion 18d of the both side plate portions 18c (corresponding to the height of the side plate portion) is fastened to the anchor bolt 14, It is set so as to generate a surface pressure necessary for crimping the adhesive portion 13b of the expansion joint 13 to the concrete structure 11 via the member 17.

  Next, an embodiment of a method for fixing the expansion joint 13 using such a fixing member 18 will be described.

  The expansion joint 13, the holding member 17 and the fixing member 18 are manufactured in the factory in advance, and the anchor bolts 14 are planted on the concrete structures 11 and 11 that are outside of the attachment portions 13 b and 13 b of the expansion joint 13 at the construction site. Set up.

  After that, first, a reinforcing cloth 15 is laid so as to straddle the joint portions 12 of the concrete structures 11, 11, the expansion joint 13 is arranged thereon, the outside is covered with the protective cover 16, and the expansion member 13 is installed. .

  Then, the holding member 17 is arranged on the attachment portions 13b and 13b of the expansion joint 13, and the fixing member 18 is tightened using the anchor bolt 14 at the positions necessary for temporary fixing, such as both end portions of the holding member 17, to hold the holding member. The expansion joint 13 is temporarily fixed via the member 17.

  In addition, in the connection part in the case of arrange | positioning the pressing member 17 on the adhesion part 13b, a clearance (clearance) is not required for the position adjustment of a bolt hole like the case where it fixes directly with the anchor bolt until now, and it adheres closely The presser member 17 can be disposed in a state in which it is held, and in particular, the corner portion can be connected and disposed without providing a gap (clearance), whereby the surface pressure can be uniformized and tightened.

  After temporarily fixing in this way, the anchor bolt 14 is inserted into the mounting hole 18b of the intermediate plate-like portion 18a of the fixing member 18 and temporarily fixed with the nut 14a to be in a state where it can be rotated or moved, and then the anchor bolt 14 is centered. The presser arm portion 18d is positioned on the presser member 17 so that the locking projection 18e at the distal end of the fixing member 18 gets over the presser member 17 by rotating or moving to the upper end, and the base end is elastically contacted. The part 18f is brought into contact with the concrete structure 11.

  Thereafter, the fixing member 18 is tightened by tightening the nut 14 a to the anchor bolt 14, and the adhesive portion 13 b of the expansion joint 13 is pressure-bonded to the concrete structure 11 via the presser member 17.

  For example, a chemical anchor is used as the anchor bolt 14 and a stainless steel M16 bolt is used.

  The fixing of the expansion joint 13 is completed by repeating such temporary fixing of the fixing member 18 to the anchor bolt 14, rotation or movement of the fixing member 18, and tightening operation of the fixing member 18.

  In the tightening state by the fixing member 18 in the fixing structure 10, the tightening force applied to the intermediate plate-like portion 18a of the fixing member 18 causes the two presser arm portions 18d of the side plate portions 18c and the elastic contact portion 18f to move. It will be distributed and added to a total of two places, and the tightening surface pressure can be made uniform as compared with the case where it is directly fixed to the anchor bolt so far. Thereby, the bolt pitch of the anchor bolt 14 can also be enlarged, and a man-hour reduction can be aimed at.

  In the fixing structure 10, both side plate portions 18 c of the fixing member 18 are elastically deformed so as to spread outward as shown in FIG. 4, and the elastic contact portions 18 f are elastically deformed by the tightening force. As shown in FIG. 3, the both sides of the pressing member 17 are fixed in an elastically deformed state by the tightening force. Therefore, even when the concrete structure 11 is displaced, the elastic effect is caused by the spring effect due to these elastic deformations. The fixed state can be maintained by reducing the decrease in the tightening surface pressure.

  Furthermore, in this fixing structure 10, the anchor bolt 14 is tightened only by the thickness of the intermediate plate-shaped portion of the fixing member 18 as compared with the case where the attachment portion 13 b of the expansion joint 13 is directly fixed by the anchor bolt. The tightening height can be lowered by the thickness of the joint 13, and the influence on the internal space of the concrete structure 11 can be suppressed.

  Further, the retaining protrusion 18e of the pressing arm portion 18d of the fixing member 18 makes it difficult for the pressing arm portion 18d of the fixing member 18 to come off even if the concrete structure 11 is displaced, thereby increasing the removal preventing effect. .

  According to such a fixing structure, fixing method, and fixing member, the bolt pitch is measured after the position of the anchor bolt so far is determined, and based on this, a flexible expansion joint, a pressing member, a protective cover, etc. The flexible expansion joint 13, the holding member 17, and the fixing member 18 can be manufactured in parallel with the installation of the anchor bolt 14, and the fixing structure 10 can be installed in a short time. Can be completed.

Next, a fixing member according to another embodiment of the present invention will be described with reference to FIG.
The fixing member 28 is constituted by a welding structure or the like, and includes a horizontal intermediate plate-like portion 28a that is inserted and fixed by an anchor bolt, and an attachment hole 28b for the anchor bolt 14 is formed. Both side plate portions 28c, 28c reinforced by bent portions are provided on both sides of the shape portion 28a by welding or the like. A presser arm portion 28d for pressing the presser member 17 is formed at the tip of each side plate portion 28c so as to protrude, and an intermediate presser arm portion 28g is provided at an intermediate portion of the both side plate portions 28c so that two front and rear portions are provided. It is supported and fixed by a support member 28h. Further, welding is performed so that the base plate portions of the both side plate portions 28c are connected to the intermediate plate-like portion 28a and the bar-like elastic contact portions 28f that are located below the space and are in contact with the concrete structure 11. It is provided.

  In this fixing member 28, the protruding length of the presser arm portion 28d and the intermediate presser arm portion 28g is set to a length corresponding to the groove width of the presser member 17, and the distal end portions of the presser arm portion 28d and the intermediate presser arm portion 28g are used. The connecting support member 28h is also used as the locking projection 28e so that the locking projection 28e can be locked in a state where the locking projection 28e is positioned outside the pressing member 17 (over the pressing member 17). It is. Further, in this fixing member 28, the anchor bolt 14 is set to a distance (corresponding to the height of the side plate portion) from the lower surface of the intermediate plate portion 28a to the lower surface of the presser arm portion 28d and the intermediate presser arm portion 28g of the both side plate portions 28c. It is set so that when it is tightened, a surface pressure required to crimp the adhesive portion 13b of the expansion joint 13 to the concrete structure 11 via the pressing member 17 can be generated.

  Also with such a fixing member 28, the attachment portion 13b of the expansion joint 13 can be crimped to the concrete structure 11 via the pressing member 17 in the same manner as the fixing member 18 already described, and the intermediate pressing arm portion 28g. Thus, the three presser arm portions 28d, 28g can disperse the load further, make the surface pressure uniform, and hold it to fix the expansion joint 13.

  The intermediate presser arm portion 28g is not limited to the case where one is added, and a plurality of additional intermediate presser arms 28g may be provided to constitute the fixing member 28, and the load can be further distributed.

Next, a fixing member according to still another embodiment of the present invention will be described with reference to FIG.
The fixing member 38 is constituted by a welded structure or the like, and is provided with a horizontal intermediate plate-like portion 38a to be inserted and fixed by an anchor bolt, and an attachment hole 38b for the anchor bolt 14 is formed. Both side plate portions 38c, 38c are provided by welding or the like so as to protrude downward on both sides of the intermediate plate-shaped portion 38a. The presser arm portions 38d for pressing the presser member 17 are formed so as to protrude from the respective front end portions of the both side plate portions 38c. Furthermore, the elastic contact part 38f formed by the bending process which is located under each base end part of the both-sides board part 38c and contact | abutted with the concrete structure 11 is provided.

  In the fixing member 38, the protruding length of the presser arm portion 38d is set to a length corresponding to the groove width of the presser member 17, and the intermediate plate-like portion 38a connecting the upper end of the presser arm portion 38d also serves as a reinforcing member. It is designed to increase the rigidity. Further, in the fixing member 38, when the distance from the lower surface of the intermediate plate portion 38a to the lower surface of the both side plate portions 38c (corresponding to the height of the side plate portion) is fastened to the anchor bolt 14, the holding member 17 is interposed. It is set so that the contact pressure required for crimping the adhesive portion 13b of the expansion joint 13 to the concrete structure 11 can be generated.

  Even with such a fixing member 38, it is possible to press the adhesive portion 13 b of the expansion joint 13 to the concrete structure 11 through the presser member 17 in the same manner as the already-described fixing members 18, 28. The rigidity of the side plate portions 38c, 38c and the presser arm portion 38d can be increased by the portion 38a, and the load can be further dispersed to make the surface pressure uniform and pressed to fix the expansion joint 13.

  In the above-described embodiment, the flexible expansion joint has been described as an example having a folding portion at the intermediate portion. However, the present invention is not limited to this, and other shapes of flexible expansion joints such as those having an extra length portion can be used. A flexible expansion joint can also be used.

It is a partial expansion perspective view concerning one embodiment of the fixation structure of the expansion joint for concrete structures of this invention, and its fixation member. BRIEF DESCRIPTION OF THE DRAWINGS It is the whole schematic cross-sectional view concerning one embodiment of the fixing structure of the expansion joint for concrete structures of this invention, and its fixing member. It is explanatory drawing which exaggerates and shows the elastic deformation state of the pressing member concerning one Embodiment of the fixing structure of the expansion joint for concrete structures of this invention, and its fixing member. It is explanatory drawing which exaggerates and shows the elastic deformation state of the fixing member concerning one Embodiment of the fixing structure of the expansion joint for concrete structures of this invention, and its fixing member. It is a perspective view of the fixing member concerning other embodiments of the fixing structure of the expansion joint for concrete structures of this invention, and its fixing member. It is a perspective view of the fixing member concerning other one embodiment of the fixing structure of the expansion joint for concrete structures of this invention, and its fixing member. It is a cross-sectional view of the conventional water stop structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Fixing structure of expansion joint for concrete structures 11 Concrete structure 12 Joint part 13 Flexible expansion joint 13a Folding part 13b Anchoring part 14 Anchor bolt 14a Nut 15 Reinforcement cloth 16 Protective cover 17 Presser member 18 Fixing member 18a Middle Plate-like portion 18b Mounting hole 18c Both-side plate portion 18d Holding arm portion 18e Locking projection portion 18f Elastic contact portion 28 Fixing member 28a Intermediate plate-like portion 28b Mounting hole 28c Both-side plate portion 28d Holding arm portion 28e Locking projection portion 28f Elasticity Contact portion 28g Intermediate presser arm portion 28h Support member 38 Fixing member 38a Intermediate plate-like portion 38b Mounting hole 38c Both side plate portions 38d Presser arm portion 38f Elastic contact portion

Claims (7)

A flexible expansion joint placed across the joint between the concrete structures;
A presser member that is pressed against the adhesive portions at both ends of the expansion joint so as to be sandwiched between the concrete structures;
The intermediate plate-shaped portion is fixed by anchor bolts attached to the concrete structure, and the base end portions of the both-side plate portions formed on both sides of the intermediate plate-shaped portion are applied to the concrete structure, and the distal end portions of the both-side plate portions A fixing structure for an expansion joint for a concrete structure, comprising: a fixing member that presses the pressing member and press-contacts the attachment portion.   2. The structure for fixing an expansion joint for a concrete structure according to claim 1, wherein the pressing member has a lip groove shape.   The expansion joint for a concrete structure according to claim 1 or 2, wherein a locking projection portion that climbs over the pressing member and locks is formed at the tip end portions of both side plate portions of the fixing member. Fixed structure.   The expansion joint for a concrete structure according to any one of claims 1 to 3, wherein an intermediate presser arm portion that presses the presser member is provided at an intermediate portion between both side plate portions of the fixing member. Fixed structure. When fixing a flexible expansion joint placed across the joint between concrete structures to the concrete structure,
After holding the pressing member against the butt portion of the expansion joint and sandwiching it with the concrete structure,
Both side plates formed on both sides of the intermediate plate-like portion by temporarily fixing the intermediate plate-like portion of the fixing member to anchor bolts attached to the concrete structure on the outer side of the attachment portion, and rotating or moving the fixing member. The expansion joint for a concrete structure is characterized in that the base end portion of the portion is applied to the concrete structure, the pressing member is pressed at the tip end portions of both side plate portions, and the fixing member is fastened to an anchor bolt. Fixing method.   An intermediate plate-like portion that is inserted and fixed to the anchor bolt is provided, and a presser arm portion that holds the presser member is provided at the distal end portion of the both-side plate portions on both sides of the intermediate plate-like portion, and the intermediate portion A fixing member for an expansion joint for a concrete structure, characterized by comprising an elastic contact portion that is flush with the concrete structure and is flush with the plate-like portion.   The expansion member for a concrete structure expansion joint according to claim 6, wherein the presser arm portion is provided with an intermediate presser arm portion in the middle of both side plate portions in addition to both side plate portions.

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