Expansion joint fixing structure

Abstract

To provide a fixing structure of an expansion joint capable of easily fixing the expansion joint even in a range where anchor bolts cannot be driven.SOLUTION: A fixing structure of an expansion joint 20 comprises a pressing member that is applied to an anchoring portion 23c of an expansion joint 23 that straddles a joint portion 22 between concrete structures 21 and is sandwiched between the concrete structures 21; a fixing member whose intermediate portion is fixed by an anchor bolt driven outside the anchoring portion 23c, whose base end is in contact with the concrete structure 21, and whose tip presses the pressing member to fix the anchoring portion 23c; an auxiliary pressing member fixed by the fixing member adjacent to the non-driving range of the anchor bolt; a connection pressing member 27A in the non-driving range; an auxiliary fixing member for the auxiliary pressing member provided with an auxiliary fixing bolt; an auxiliary support member 33 bridged and fixed between auxiliary fixing members; and an auxiliary pressing member 34 that presses the connecting pressing member 27A and presses and fixes the anchoring portion 23c within the non-driving range of the auxiliary pressing member 33.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a fixing structure for an expansion joint. [Background technology]

[0002] The joints of concrete structures such as tunnels, waterways, and culverts constructed underground, such as utility tunnels, must be waterproof from both the inside and outside, and must also be able to accommodate uneven settlement of the concrete structures on both sides, displacement during earthquakes, and expansion and contraction due to temperature changes, etc., so flexible expansion joints made of rubber or synthetic resin are installed inside the concrete structures.

[0003] As a fixing structure for attaching an expansion joint to a joint in a concrete structure, there are methods in which an anchor bolt is passed through the anchoring portion and pressure plate at both ends of the expansion joint and then fastened with a nut to fix it directly (see, for example, Patent Document 1), and there are methods in which the tip of a pressure fitting with a middle part fastened to the anchor bolt is pressed against the pressure plate that is placed against the anchoring portion, thereby attaching it without passing through the anchor bolt (see, for example, Patent Document 2).

[0004] Concrete structures often have equipment such as cables, electric wires, and piping installed inside them, and if the anchor bolts interfere with such equipment, it becomes difficult to install the anchor bolts, making it impossible to secure the expansion joint. In particular, when replacing an expansion joint, it can be difficult to relocate the equipment, unlike before it was installed, and there is a need for a fixing structure that can accommodate this.

[0005] Therefore, Patent Document 1 discloses a fixing structure for when an expansion joint is tightened directly to anchor bolts, in which a contact member without a bolt hole of the anchor bolt is placed against the anchoring part in the part between the anchor bolts that cannot be driven, and a support member is placed against the contact member from the opposite side of the anchoring part to support it, and the contact member and support member are fixed to the part between the anchor bolts with anchor bolts on both ends, and in the position of the anchor bolt that cannot be driven, a bolt is screwed into the support member as pressing means for pressing the abutment member, and is fixed by tightening. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Publication No. 2020-133346 [Patent Document 2] Japanese Patent Application Laid-Open No. 2012-225037 Summary of the Invention [Problem to be solved by the invention]

[0007] In the structure disclosed in Cited Document 1, in which the expansion joint is fixed by directly passing through it with an anchor bolt, through holes for fixing must be formed in the abutment member and support member in accordance with the spacing between the anchor bolts, even in areas where anchor bolts cannot be driven, and it becomes necessary to measure the bolt positions after driving them. If this expansion joint fixing structure is applied as is to a structure in which the anchor bolts are attached without passing through them and therefore there is no need to measure the positions of the anchor bolts (a so-called boltless structure), there are problems such as the work becoming complicated.

[0008] The present invention was made in consideration of the problems with the conventional technology, and aims to provide a fixing structure for an expansion joint that can easily fix an expansion joint even in areas where anchor bolts cannot be installed. [Means for solving the problem]

[0009] The fixing structure of the expansion joint according to the present invention for solving the above problems comprises: a pressing member that is brought into contact with anchoring portions at both ends of a flexible expansion joint that is disposed across a joint between concrete structures and that presses the concrete structures so as to sandwich the concrete structures; a fixing member having an intermediate portion fixed by an anchor bolt driven into the outside of the anchoring portion of the concrete structure, a base end abutting the concrete structure, and a tip end pressing the pressing member to fix the anchoring portion; An auxiliary pressing member that is arranged on the outside adjacent to a non-driving area where the anchor bolt cannot be driven and is fixed by the fixing member; A connecting presser member arranged in the non-casting range between the auxiliary presser members; an auxiliary fixing member attached to the auxiliary pressing member and provided with an auxiliary fixing bolt; an auxiliary support member that is bridged between the auxiliary fixing members and fixed by the auxiliary fixing bolt; and an auxiliary pressing member that is located within the non-casting range of the auxiliary support member and presses the connecting pressing member to press and fix the anchoring portion. It is characterized by:

[0010] It is preferable that the auxiliary support member has a reinforcing member provided along one edge thereof for supporting a reaction force generated by the pressing of the auxiliary pressing member.

[0011] It is preferable that the auxiliary pressing member includes a contact member that is brought into contact with the connecting pressing member, and presses the connecting pressing member via the contact member to fix the anchoring portion.

[0012] It is preferable that the auxiliary holding member is provided so that the auxiliary fixing bolt is slidable along the anchoring portion.

[0013] the auxiliary pressing member The interval between the fixing members that press the teeth, The interval between the fixing members is narrower than the interval between the fixing members that press the pressing member. , is preferred.

[0014] The fixing member presses the auxiliary pressing member. The anchor bolt Length teeth, The length of the anchor bolt of the fixing member that presses the pressing member is longer than the length of the anchor bolt. , is preferred. [Effects of the Invention]

[0015] According to the expansion joint fixing structure of the present invention, the expansion joint can be easily fixed even in areas where anchor bolts cannot be installed. [Brief explanation of the drawings]

[0016] [Figure 1] FIG. 1 is a partial perspective view of a fixing structure for an expansion joint according to an embodiment of the present invention, in which a pressing member is fixed by a fixing member. [Figure 2] 10 is a cross-sectional view showing a state in which a pressing member is fixed by a fixing member according to an embodiment of the present invention. FIG. [Figure 3] FIG. 1A is a front view of one embodiment of the present invention, and FIG. 1B is a cross-sectional view taken along line AA in FIG. [Figure 4] FIG. 10 is a cross-sectional view of a non-casting area in another embodiment of the present invention. [Figure 5] FIG. 1 shows a reinforcing fixing member according to one embodiment of the present invention, in which (a) is a front view, (b) is a cross-sectional view taken along line bb in (a), (c) is a cross-sectional view taken along line cc in (a), and (d) is a cross-sectional view taken along line dd in (a). [Figure 6] FIG. 2 is a schematic perspective view of an auxiliary pressing member according to an embodiment of the present invention. [Figure 7] 10A is a perspective view showing a sliding portion of an auxiliary fixing bolt with a portion thereof omitted, and FIG. 10B is a cross-sectional view of the sliding portion of the auxiliary fixing bolt according to another embodiment of the present invention. [Figure 8] FIG. 10 is a schematic perspective view showing, with a portion thereof omitted, an auxiliary pressing member according to another embodiment of the present invention. [Figure 9] FIG. 1 relates to one embodiment of the present invention, and (a) is an explanatory diagram of a first step, and (b) is an explanatory diagram of a second step. [Figure 10] 1A is an explanatory diagram of the third step, FIG. 1B is an explanatory diagram of the fourth step, and FIG. 1C is an explanatory diagram of the fifth step according to one embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0017] Hereinafter, an embodiment of a fixing structure for an expansion joint of the present invention will be described in detail with reference to the drawings. The expansion joint fixing structure (hereinafter simply referred to as the fixing structure) 20 is a structure for fixing a flexible expansion joint 23 made of rubber, synthetic resin, or the like across a joint 22 of concrete structures 21, 21, as shown in Figures 1 and 2, for example. The fixing structure 20 is designed to ensure the same tightening force as in other parts even when anchor bolts 24 cannot be driven in due to interference with cables, piping, etc., but first, the part where anchor bolts 24 can be driven (the part outside the non-driving range L) will be described. By fixing and installing the expansion joint 23 using the fixing structure 20, water is stopped and expansion and contraction due to uneven settlement of the concrete structures 21, 21 on both sides of the joint portion 22, displacement during earthquakes, temperature changes, etc. are allowed.

[0018] The flexible expansion joint 23 used in this fixing structure 20 has an expansion section 23b, which has a cross section that is continuous with an arc section 23a in the middle of the width direction of a long strip, and which meanders in a roughly W-shape, for example, as shown in Figure 2. The expansion joint 23 has flat anchor sections 23c for fixing at both ends in the width direction and is made of an elastic material such as rubber or synthetic resin, and one or more reinforcing layers are embedded as necessary.

[0019] The anchoring portion 23c of the expansion joint 23 is positioned so as to straddle the joint 22 of the concrete structure 21, and the expansion portion 23b is stored in a storage portion 25 formed by opposing groove-like steps in the joint 22 of the concrete structure 21. Note that the storage portion 25 may be omitted and the expansion joint 23 may be installed between the flat joints 22 (see Figures 3(b) and 4).

[0020] The expansion joint 23 is installed with either a water-stopping material or a reinforcing fabric such as polyester laid over the joint 22 of the concrete structure 21 as needed. Furthermore, the expansion joint 23 is installed via both the water-stopping material and the reinforcing fabric as needed. Furthermore, a protective cover 26 is provided as needed to cover the entire upper part of the expansion joint 23 up to the anchoring parts 23c on both sides, and the protective cover 26 is also provided with folding parts 26a that can accommodate expansion and contraction.

[0021] In the fixing structure 20, a pressing member 27 is applied to the anchoring portion 23c of the expansion joint 23. The pressing member 27 has, for example, a cross section that is roughly U-shaped with a lip groove that opens upward. Note that the pressing member 27 can also be reinforced by inserting and fixing a reinforcing member or the like in the groove.

[0022] In the fixing structure 20, the pressing member 27 is not fixed directly to the concrete structure 21 with the anchor bolts 24, but the fixing member 28 is tightened via the anchor bolts 24 driven into the outside of the expansion joint 23, and the pressing member 27 is pressed and fixed via this fixing member 28.

[0023] The fixing member 28 has an intermediate plate-shaped portion 28a through which the anchor bolt 24 is inserted and fixed, and has a mounting hole 28b for the anchor bolt 24 formed therein. Both sides of the intermediate plate-shaped portion 28a are bent inward to form side plate portions 28c. The fixing member 28 is formed so that a pressing arm portion 28d that presses the pressing member 27 protrudes from the tip of each side plate portion 28c. The fixing member 28 is configured such that an elastic abutment portion 28f is integrally formed at the base end of each side plate portion 28c, and is flush with the intermediate plate-shaped portion 28a across a space, protruding inward to abut against the concrete structure 21. In the fixing member 28, the protruding length of the pressing arm portion 28d is approximately the same as the groove width of the pressing member 27, and the tip of the pressing arm portion 28d protrudes slightly outside the pressing member 27. In order to prevent interference or damage when the expansion joint 23 is significantly displaced by the tip of the pressing arm portion 28d, it is more effective to make the upper tip portion arch and retreat, or to make the tip surface of the pressing arm portion 28d retreat from the pressing member 27. Furthermore, the pressing arm portion 28d may have a combination of making the upper tip portion arch and retreating the tip surface.

[0024] The fixing member 28 has a locking protrusion 28e formed on the underside of the pressing arm portion 28d, which protrudes into the groove of the pressing member 27 and locks in place. The locking protrusion 28e is made to be approximately the same size as the groove width of the pressing member 27, so that it can be locked in front of and behind the locking protrusion 28e. The amount of protrusion of the locking protrusion 28e may be any amount that prevents the pressing member 27 from moving due to the displacement of the expansion joint 23.

[0025] Furthermore, the fixing member 28 is set so that when the anchor bolt 24 is tightened up to the distance from the underside of the intermediate plate-shaped portion 28a to the underside of the pressing arm portion 28d of each side plate portion 28c (corresponding to the height of the side plate portions), the surface pressure required to press the anchoring portion 23c of the expansion joint 23 to the concrete structure 21 via the pressing member 27 can be generated.

[0026] Furthermore, in the fixing structure 20, a pair of protruding edges 23d are formed on the anchoring portions 23c at both ends of the flexible expansion joint 23 to prevent misalignment when the pressing member 27 is placed on them and tightened with the fixing members 28, and the spacing between the pair of protruding edges 23d is made approximately the same as or narrower than the width of the pressing member 27, so that the pressing member 27 can be clamped by the flexibility of the expansion joint 23. In the fixing structure 20, one of the pair of protruding edges 23d is formed on the outside of the anchoring portion 23c and protrudes upward, and the other serves also as the outer surface of the expansion portion 23b. This allows the pair of protruding edges 23d to sandwich the pressing member 27, and further sandwich it with elastic force, thereby improving stability against forces and displacements applied to the expansion joint 23, and making the structure even more resistant to water pressure, etc.

[0027] For the fixing structure 20, the expansion joint 23, the holding member 27, and the fixing member 28 are fabricated in advance in a factory. To construct the fixing structure 20, anchor bolts 24 are driven into the concrete structures 21, 21 on the outside of the anchoring portion 23c of the expansion joint 23, to the extent that the driving of the anchor bolts 24 does not interfere with internal facilities such as cables and piping. As the anchor bolts 24, for example, adhesive anchors are used, and stainless steel bolts are used.

[0028] After this, if necessary, a water-stopping material or a reinforcing fabric such as polyester, or both the water-stopping material and the reinforcing fabric, is laid across the joints 22 of the concrete structure 21, and the expansion joint 23 is placed on top of that, and if necessary, the outside of that is covered with a protective cover 26, and the expansion joint 23 is then installed.

[0029] A pressure member 27 is placed on the anchoring portion 23c of the expansion joint 23, and anchor bolts 24 are used to tighten the fixing members 28 at positions such as both ends of the pressure member 27, thereby temporarily fixing the expansion joint 23 via the pressure member 27.

[0030] After this, the anchor bolt 24 is inserted into the mounting hole 28b of the intermediate plate-shaped portion 28a of the fixing member 28 and temporarily fixed with the nut 24a to make it rotatable or movable, and the fixing member 28 rotates or moves around the anchor bolt 24 to position the locking protrusion 28e at the tip of the fixing member 28 within the groove of the pressing member 27, positioning the pressing arm portion 28d on the pressing member 27, and abutting the elastic abutment portion 28f at the base end against the concrete structure 21.

[0031] Thereafter, the nuts 24a are tightened onto the anchor bolts 24 to tighten the fixing members 28, and the anchoring portions 23c of the expansion joints 23 are pressed and fixed to the concrete structure 21 via the pressing members 27. By repeating the process of temporarily fixing the fixing members 28 to the anchor bolts 24, rotating or moving the fixing members 28, and tightening the fixing members 28, the fixing of the expansion joints 23 via the anchor bolts 24 is completed.

[0032] Next, the fixing structure 20 in the non-driving range L where the anchor bolts 24 cannot be driven will be described with reference to FIGS. In the range where the driving of the anchor bolts 24 will interfere with internal facilities such as cables and piping, for example, in the non-driving range L of the anchor bolts 24 shown in Fig. 3(a), the fixing structure 20 has an auxiliary holding member 30 fixed by a fixing member 28 arranged on the outside adjacent to the non-driving range L. Between the two auxiliary holding members 30 on the outside of the non-driving range L (non-driving range L), a connecting holding member 27A is arranged. Auxiliary holding members 30 are attached with auxiliary fixing members 32, each equipped with an auxiliary fixing bolt 31. Auxiliary support members 33 are spanned between the auxiliary fixing members 32 and fixed with the auxiliary fixing bolts 31. The auxiliary support members 33 are equipped with auxiliary pressing members 34, which are positioned within the non-casting area L and press against the connecting holding members 27A, thereby pressing and fixing the anchoring portions 23c. These components form the fixing structure 20.

[0033] In the non-casting range L of the anchor bolt 24, a pressing member having the same cross-sectional shape as the cast portion of the anchor bolt 24 (the portion outside the non-casting range L) and a length adjusted to fit the non-casting range L is arranged as a connecting pressing member 27A, and is installed on the anchoring portion 23c of the expansion joint 23 so as to be in contact with the auxiliary pressing members 30 on both sides, for example, without any gaps (see Figures 3(a) and (b)).

[0034] Auxiliary fixing members 32, 32A are provided on each auxiliary holding member 30 outside the non-concreting area L. As shown in Figures 5 and 6, the two intermediate auxiliary fixing members 32 have two fixing plate portions 32a that straddle the grooves on the top surface of the auxiliary holding member 30. Auxiliary fixing bolts 31 penetrate each fixing plate portion 32a and protrude upward from the inside of the grooves. Two inner reinforcing plates 32b are provided on the inner side surfaces of the grooves along the entire length of the auxiliary holding member 30 and are fixed together by welding or the like. An auxiliary fixing member 32A is provided at the end of the auxiliary holding member 30 on the non-concreting area L side. Half of the fixing plate portion 32a that straddles the grooves on the top surface of the auxiliary holding member 30 protrudes from the auxiliary holding member 30. An auxiliary fixing bolt 31 protrudes upward from the tip of the protruding fixing plate portion 32a and is fixed together by welding or the like. Auxiliary fixing member 32A has a substantially L-shaped outer reinforcing plate 32c on the side of fixing plate portion 32a facing anchor portion 23c, which covers the side surfaces of fixing plate portion 32a and auxiliary pressing member 30 and is fixed by welding or the like. This outer reinforcing plate 32c also comes into contact with the side surface of connecting pressing member 27A (see, for example, Figures 9 and 10). As a result, three auxiliary fixing bolts 31 protrude upward from each auxiliary pressing member 30. The three auxiliary fixing bolts 31 are arranged at predetermined intervals. The positions of the through holes 33b of the auxiliary support member 33, which will be described later, are determined according to the installation positions of the three auxiliary fixing bolts 31.

[0035] As shown in Figures 7(a) and 7(b), the auxiliary fixing member 32 can be made movable along the groove of the auxiliary holding member 30, and the installation position of the auxiliary fixing bolt 31 can be changed as needed to match the position of the through-hole 33b of the auxiliary support member 33, which will be described later. In this case, a backing plate 32d is provided on the underside of the groove of the auxiliary holding member 30, and the auxiliary fixing bolt 31 is passed through from below, and the backing plate 32d and the fixing plate portion 32a are slid together before being tightened. Alternatively, the position of the through-hole 33b of the auxiliary support member 33, which will be described later, is determined and formed in advance, and the auxiliary fixing bolt 31 is slid through the backing plate 32d, the fixing plate portion 32a, and the entire auxiliary support member 33 are tightened. This makes it easier to control the manufacturing accuracy of the auxiliary support member 33, improving the flexibility of on-site construction.

[0036] The auxiliary support member 33 is bridged over the auxiliary fixing members 32, 32A on the auxiliary pressing members 30 on both sides (outside) of the non-casting area L. The auxiliary support member 33 has through holes 33b for the auxiliary fixing bolts 31 formed in its plate-shaped support portion 33a. The auxiliary support member 33 has three through holes 33b formed on each end, spaced apart to match the positions of the auxiliary fixing bolts 31. A plurality of screw holes 33c are formed in the support portion 33a of the auxiliary support member 33, and press screws 34a that constitute the auxiliary pressing member 34, described below, are screwed into the holes. The press screws 34a are positioned so as to face the connecting press member 27A.

[0037] A reinforcing member 33d for preventing deflection is integrally attached to the auxiliary support member 33 by welding or the like so as to protrude upward along the outer edge, which is one end edge of the support portion 33a. The reinforcing member 33d may be in the form of a plate that protrudes upward, as shown in FIG. 3(b), or in the form of a plate that protrudes downward, as shown in FIG. 4. Providing the reinforcing member 33d so as to protrude downward makes it easier to ensure workability, such as tightening, from above. The auxiliary support member 33 is also provided with an auxiliary pressing member 34 that presses the connecting pressing member 27A arranged in the non-casting area L to press the anchoring portion 23c of the expansion joint 23.

[0038] The auxiliary pressing member 34 has multiple threaded holes 33c formed in the support portion 33a of the auxiliary support member 33, into which the press screws 34a are screwed. The press screws 34a apply a pressing force to the connecting press member 27A by varying the length of their protrusion from the support portion 33a and abutting against the bottom surface of the groove in the connecting press member 27A. This presses down the anchor portion 23c of the expansion joint 23. When the press screws 34a of the auxiliary pressing member 34 apply a pressing force, a reaction force is applied to the support portion 33a. However, the auxiliary support member 33 is attached so that the reinforcing member 33d has an L-shaped cross section on the outer edge, which is one end edge of the support portion 33a, ensuring the necessary rigidity. The auxiliary pressing member 34 does not necessarily have to have the same number of press screws 34a as the number of anchor bolts 24 that cannot be driven. The number of press screws 34a may be increased at intervals narrower than the spacing between the anchor bolts 24, or may be reduced as long as the pressing force can be ensured.

[0039] Instead of directly pressing the bottom surface of the groove of the connecting press member 27A with the pressing screw 34a, the auxiliary pressing member 34 is provided with a contact member 35 that is placed against the connecting press member 27A, as shown in Figure 8, and the tip of the pressing screw 34a is placed against the contact member 35, pressing the connecting press member 27A via the contact member 35 and pressing and fixing the anchor portion 23c. The contact member 35 has, for example, substantially the same shape as only the tip of the pressing arm portion 28d of the fixing member 28 used for fixing with the anchor bolt 24, and is formed by connecting the upper ends 35b of two side plate portions 35a together, forming a U-shaped cross section that is open downward. The side plate portion 35a is formed with a locking protrusion 35c that protrudes downward and fits into the groove of the connecting pressing member 27A. The locking protrusion 35c positions the contact member 35 at a predetermined position and prevents rotation during tightening. By fixing the connecting pressing member 27A via the contact member 35, the auxiliary pressing member 34 can fix the connecting pressing member 27A in the non-driving area L with the same structure as the driving area of ​​the anchor bolt 24 that fixes the pressing member 27 with the anchor bolt 24. Although not shown, the contact member 35 can be formed of a thick plate that straddles the groove of the connecting press member 27A, and its shape is not particularly limited as long as a pressing force can be applied from the upper surface of the groove of the connecting press member 27A. Furthermore, when fastening via the contact member 35, although not shown, it can also be pressed and fixed by pressing both sides of the upper surface of the groove of the connecting press member 27A with two pressing screws 34a.

[0040] In the expansion joint fixing structure 20 configured in this manner, the expansion joint is fixed within a range in which anchor bolts 24 can be driven, as shown in Figures 1 and 2, for example. Within this range, the anchor bolts 24 are driven into the concrete structure 21 on the outside of the anchoring portion 23c of the expansion joint 23.

[0041] After this, either a waterproof material or a reinforcing fabric such as polyester is laid and placed as needed across the joints 22 of the concrete structure 21. Furthermore, if necessary, an expansion joint 23 is placed with both the waterproof material and the reinforcing fabric interposed therebetween. The outside of the expansion joint 23 is installed covered with a protective cover as needed.

[0042] A pressure member 27 is placed on the anchoring portion 23c of the expansion joint 23, and anchor bolts 24 are used to tighten the fixing members 28 at positions such as both ends of the pressure member 27, temporarily fixing the expansion joint 23 via the pressure member 27. Further, on the outer side of the non-pouring area L, one auxiliary holding member 30 is placed at a distance equal to the non-pouring area L. In addition, in the non-pouring area L, a connecting holding member 27A is placed. In addition, when the auxiliary fixing member 32 is made slidable on the auxiliary pressing member 30, the required number of auxiliary fixing members 32, for example, four in pairs, are attached in advance so that they can slide, and the auxiliary fixing member 32A is fixed by welding (see Figures 5 to 7, etc.).

[0043] Thereafter, anchor bolt 24 is inserted into mounting hole 28b of intermediate plate-shaped portion 28a of fixing member 28 and temporarily fastened with nut 24a to enable rotation or movement. Fixing member 28 is then rotated or moved around anchor bolt 24, and locking protrusion 28e at the tip of fixing member 28 is positioned within the groove of pressing member 27, arm portion 28d is positioned on pressing member 27, and elastic contact portion 28f at the base end is brought into contact with concrete structure 21 (see FIG. 9(b), etc.).

[0044] Thereafter, the nuts 24a are tightened onto the anchor bolts 24 to tighten the fixing members 28, and the anchoring portions 23c of the expansion joints 23 are pressed and fixed to the concrete structure 21 via the pressing members 27. By repeating the process of temporarily fixing the fixing members 28 to the anchor bolts 24, rotating or moving the fixing members 28, and tightening the fixing members 28, the fixing of the expansion joints 23 via the anchor bolts 24 is completed. Furthermore, when the auxiliary fixing member 32 is made slidable on the auxiliary pressing member 30, the auxiliary fixing bolt 31 of the auxiliary pressing member 30 is positioned and fixed in accordance with the arrangement of the through hole 33b formed in the auxiliary support member 33. When fastening the fixing member 28 with the anchor bolts 24, the number of anchor bolts 24 can be increased by narrowing the intervals between the anchor bolts 24 in the area where the auxiliary pressing member 30 is installed, or the anchor bolts 24 can be made longer and driven deeper to increase the fastening force and distribute the load (see Figure 10(b), etc.).

[0045] An auxiliary support member 33 is bridged between the auxiliary holding members 30 arranged on the holding members 27 outside the non-casting area L, and the auxiliary fixing bolts 31 of the auxiliary fixing members 32, 32A are inserted into the through holes 33b and tightened with nuts 31a to fix the auxiliary support member 33. As a result, the auxiliary support member 33 is arranged opposite and parallel to the connecting holding member 27A of the non-casting area L.

[0046] Next, the press screw 34a of the auxiliary press member 34 is screwed into the screw hole 33c of the auxiliary support member 33 to press the groove bottom surface of the connecting press member 27A and fix the anchor portion 23c (see FIG. 3(b), FIG. 10(c), etc.). Alternatively, as shown in FIG. 8, the connection pressing member 27A may be pressed and fixed by the pressing screw 34a via the contact member 35. In this way, the expansion joint 23 can be fixed by the fixing structure 20 even in the non-casting area L where the anchor bolts 24 cannot be installed. Furthermore, there is no need to measure the position of the anchor bolt 24 in advance even in the non-casting range L of the anchor bolt 24. By fixing the auxiliary fixing members 32, 32A to the auxiliary pressing member 30 at a predetermined interval, the auxiliary fixing bolt 31 can be inserted into the through hole 33b of the auxiliary support member 33, and the expansion joint 23 can be easily fixed. In addition, the expansion joint 23 can be similarly easily fixed by moving the auxiliary fixing member 32 of the auxiliary pressing member 30 to match the position of the through hole 33b of the auxiliary support member 33 and passing the auxiliary fixing bolt 31 through it. In the fixing structure 20, a reaction force is applied to the auxiliary support member 33 when the auxiliary pressing member 34 is tightened by the pressure screws 34a, but the reinforcing member 33d suppresses deflection, thereby ensuring the necessary tightening force. In particular, the reinforcing member 33d, which is provided on one edge of the auxiliary support member 33 so as to protrude downward, ensures the ease of tightening with the pressure screws 34a. Furthermore, by suppressing the reaction force caused by tightening, it is possible to manage the tightening torque of the multiple pressure screws 34a and ensure a uniform tightening force, thereby avoiding the effects of deflection of the auxiliary support member 33.

[0047] As specifically explained above in conjunction with the embodiment, the fixing structure 20 of the expansion joint comprises a pressing member 27 that is brought into contact with the anchoring portions 23c, 23c at both ends of the flexible expansion joint 23 that is arranged across the joint portion 22 between the concrete structures 21, 21, and that presses the concrete structure 21 so as to sandwich the anchoring portions 23c, 23c, and a fixing member 28 that is fixed at its middle portion by an anchor bolt 24 that is driven into the outside of the anchoring portion 23c of the concrete structure 21, and that has its base end in contact with the concrete structure 21, and that presses the pressing member 27 at its tip end to fix the anchoring portion 23c. The base is configured to include an auxiliary pressing member 30 that is arranged outside adjacent to the non-casting range L where the bolts 24 cannot be cast and is fixed by a fixing member 28, a connecting pressing member 27A that is arranged in the non-casting range L between the auxiliary pressing members 30, an auxiliary fixing member 32 that is attached to the auxiliary pressing member 30 and has an auxiliary fixing bolt 31 provided thereon, an auxiliary support member 33 that is bridged between the auxiliary fixing members 32 and fixed by the auxiliary fixing bolt 31, and an auxiliary pressing member 34 that is located within the non-casting range L of the auxiliary support member 33 and presses the connecting pressing member 27A to press and fix the anchoring portion 23c.

[0048] With this configuration, the expansion joint 23 can be easily fixed even in the non-casting range L where the anchor bolts 24 cannot be installed, using the auxiliary fixing members 32, 32A attached to the auxiliary holding members 30 of the fixing structure 20 and provided with the auxiliary fixing bolts 31, the auxiliary support member 33 that is bridged between the auxiliary fixing members 32, 32A and fixed by the auxiliary fixing bolts 31 passing through it, and the auxiliary pressing member 34 that is located within the non-casting range L of the auxiliary support member 33 and presses the connecting holding member 27A to fix the anchoring portion 23c. Furthermore, there is no need to measure the position of the anchor bolt 24 in advance in the non-casting range L of the anchor bolt 24, and the auxiliary support member 33 can be easily bridged by installing the auxiliary holding member 30 adjacent to the non-casting range L, and the expansion joint 23 can be easily fixed in the same way as a so-called boltless fixing structure.

[0049] The auxiliary support member 33 is provided with a reinforcing member 33d along one edge thereof for supporting the reaction force generated by the pressing of the auxiliary pressing member . According to this configuration, deflection can be suppressed by reinforcing the auxiliary support member 33 with a reinforcing member 33d that protrudes upward or downward from one end edge, and the expansion joint 23 in the non-casting range L can be securely pressed and fixed by the auxiliary pressing member 34 while suppressing the influence of the reaction force.

[0050] The auxiliary pressing member 34 includes a contact member 35 that contacts the connecting pressing member 27A, and presses the connecting pressing member 27A via the contact member 35 to fix the anchoring portion 23c. According to this configuration, by pressing the connection pressing member 27A via the backing member 35, the anchoring portion 23c of the expansion joint 23 can be fixed in place with a structure similar to the driving range of the anchor bolt 24.

[0051] The auxiliary pressing member 30 has an auxiliary fixing bolt 31 provided so as to be slidable along the anchoring portion 23c. With this configuration, there is no need to measure the position of the through hole 33b formed in the auxiliary support member 33 fixed by the auxiliary fixing bolt 31 on-site, and it can be manufactured in advance in a factory, etc. Furthermore, even if a manufacturing error occurs, the position can be adjusted by sliding the auxiliary fixing bolt 31, increasing the degree of freedom in construction.

[0052] The auxiliary pressing member 30 is fixed by a fixing member 28 arranged at a narrower interval than the anchor bolts 24 . According to this configuration, by fixing the auxiliary pressing member 30 to narrow the spacing between the anchor bolts 24, it is possible to more reliably ensure the pressing force and reaction force, and the expansion joint 23 in the non-casting range L can be reliably pressed and fixed.

[0053] The anchor bolt 24 is installed by being driven long and deep. According to this configuration, the fixing member 28 to which the auxiliary pressing member 30 is fixed can be fixed more reliably, and the expansion joint 23 in the non-casting range L can be pressed and fixed reliably.

[0054] In the above embodiment, the flexible expansion joint 23 has been described as having a generally W-shaped cross section with five or three arc sections 23a continuing as the expansion section 23b in the middle, but this is not limiting, and flexible expansion joints 23 of other shapes can also be used. Furthermore, the components 30 to 35 of the expansion joint 23 and the fixing structure 20 are not limited to those described in the above embodiment, and any components with the same function can be used in the same way even if they have a different shape, etc. Furthermore, the steps in the fixing structure 20 are not necessarily limited to the above-mentioned order, and the steps may be changed as long as the anchoring portion 23c can be fixed in the end. [Explanation of symbols]

[0055] 20 Fixing structure of expansion joint (fixing structure) 21 Concrete Structures 22 Joint 23 Expansion joint 23a Arc section 23b Telescopic part 23c Anchoring section 23d Edge 24 anchor bolts 24a nut 25 Storage area 26 Protective cover 26a Folding section 27 Pressing member 27A Connecting clamp member 28 Fixing member 28a Intermediate plate-shaped part 28b mounting hole 28c Both side plates 28d Presser arm 28e Locking protrusion 28f Elastic contact part 30 Auxiliary holding member 31 Auxiliary fixing bolt 31a Nut 32 Auxiliary fixing member 32A Auxiliary fixing member 32a Fixed plate part 32b Inside reinforcing plate 32c outer reinforcement plate 32d Backing plate 33 Auxiliary support member 33a Support part 33b Through hole 33c screw hole 33d Reinforcement member 34 Auxiliary pressing member 34a Press screw 35 Backing material 35a Side plate part 35b Upper end 35c Locking protrusion L Non-pouring area

Claims

1. a pressing member that is brought into contact with anchoring portions at both ends of a flexible expansion joint that is disposed across a joint between concrete structures and that presses the concrete structures so as to sandwich the concrete structures; a fixing member having an intermediate portion fixed by an anchor bolt driven into the outside of the anchoring portion of the concrete structure, a base end abutting the concrete structure, and a tip end pressing the pressing member to fix the anchoring portion; An auxiliary pressing member that is arranged on the outside adjacent to a non-driving area where the anchor bolt cannot be driven and is fixed by the fixing member; A connecting presser member arranged in the non-casting range between the auxiliary presser members; an auxiliary fixing member attached to the auxiliary pressing member and provided with an auxiliary fixing bolt; an auxiliary support member that is bridged between the auxiliary fixing members and fixed by the auxiliary fixing bolt; and an auxiliary pressing member that is located within the non-casting range of the auxiliary support member and presses the connecting pressing member to press and fix the anchoring portion. A fixing structure for an expansion joint.

2. The auxiliary support member has a reinforcing member provided along one edge thereof to support a reaction force generated by the pressing of the auxiliary pressing member. The expansion joint fixing structure according to claim 1.

3. the auxiliary pressing member includes a contact member that is brought into contact with the connecting pressing member, The connecting presser member is pressed via the contact member to fix the anchoring portion.

3. The expansion joint fixing structure according to claim 1 or 2.

4. The auxiliary holding member is provided so that the auxiliary fixing bolt is slidable along the anchor portion. The fixing structure of an expansion joint according to any one of claims 1 to 3.

5. the interval between the fixing members pressing the auxiliary pressing member is narrower than the interval between the fixing members pressing the pressing member; The fixing structure of an expansion joint according to any one of claims 1 to 4.

6. The length of the anchor bolt of the fixing member that presses the auxiliary pressing member is longer than the length of the anchor bolt of the fixing member that presses the pressing member, The fixing structure of an expansion joint according to any one of claims 1 to 4.

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