JP2021156041A - Concrete member joint and concrete member joining method - Google Patents

Abstract

To provide a concrete member joint etc. which can join a receiving member and a connecting member even if there is a lateral or vertical displacement between the receiving members embedded in the end parts of the adjacent concrete members.SOLUTION: Provided are receiving members installed on the end side of each of adjacent concrete members, connecting members that connect each of the receiving members and joining members that connects each of the receiving members and the connecting members, the joining members are members that are fitted between an inner wall surface of at least one opposed wall among all recessed opposed walls of receiving members that oppose each other and the inner wall surface of an insertion part that faces the inner wall surface and join the opposed walls and the insertion parts, the joining member 4 is formed by including a leading member 4A installed between the inner wall surface of the opposed wall opposing each other and the inner surface of the insertion portion and a trailing member 4B fitted between the installed leading member and the inner wall surface of the opposed wall, or between the installed leading member and the inner surface of the insertion part.SELECTED DRAWING: Figure 7

Description

The present invention relates to a joint or the like of a concrete member for connecting concrete members to each other.

Deck made of concrete precast for bridges, for example, as a concrete member is laid on multiple main girders arranged side by side in the direction perpendicular to the bridge axis (bridge width direction), and the decks adjacent to each other along the bridge axis direction are cottered. A floor slab connection method for connecting using a joint called a type joint is known (see Patent Document 1).
The joint has a structure including a receiving member installed on the end side of each adjacent floor slab, a connecting member connecting the adjacent receiving members, and a bolt for fixing the connecting member to the receiving member. be. The receiving member includes an engaging receiving portion provided with an engaging receiving portion on which the engaging portion provided on the connecting member engages, and a fixing portion formed of a steel material such as a fixing bar that is fixed to the concrete of the floor slab. And. The connecting member includes a pair of engaging portions that engage with each engaging receiving portion of the receiving member installed at each end of each deck adjacent to each other, and a connecting portion that connects the pair of engaging portions. ..
According to the joint, after inserting each engaging portion of the connecting member into each engaging receiving portion of each engaging receiving portion embedded in the end of each floor slab adjacent to each other along the bridge axis direction, the engagement portion is engaged. By inserting the bolt into the bolt insertion hole formed in the fixing part of the engaging part fitted in the joint receiving part and fastening the bolt to the screw hole formed in the bottom slab of each engaging receiving part, the connecting member and the connecting member The engagement receiving portion is fixed, and the joints connect the floor slabs adjacent to each other.

Japanese Patent No. 57879665

However, due to joint manufacturing error, floor slab manufacturing error and variation in shrinkage (warp), variation in the amount of epoxy resin applied to the joint to prevent corrosion, construction error when erection of the deck, etc. Each engagement receiving part embedded in the end of each matching floor slab is displaced in the left-right direction and the up-down direction. If this deviation is large, it becomes difficult to fit the engaging portion of the connecting member into the engaging receiving portion of the engaging receiving portion, and the connecting member and the engaging receiving portion cannot be connected. Further, even if the engaging portion of the connecting member can be fitted into the engaging receiving portion, the bolt insertion hole of the engaging portion fitted into the engaging receiving portion and the screw hole of the bottom plate of each engaging receiving portion Since the bolts do not match, the bolts cannot be fastened, and the connecting member and the engaging receiving portion cannot be connected. In this way, when the connecting member and the engaging receiving portion cannot be connected, stress cannot be transmitted at the joint portion, which may cause damage at the joint portion.
The present invention is a joint of a concrete member capable of connecting the receiving member and the connecting member even when the receiving members embedded in the ends of the adjacent concrete members are displaced in the horizontal direction or the vertical direction. Etc. are provided.

The joint of a concrete member according to the present invention is a joint of a concrete member for connecting concrete members to each other, and a receiving member installed on the end side of each adjacent concrete member and each receiving member adjacent to each other. The receiving member is provided with a connecting member for connecting the two members and a connecting member for connecting the receiving members adjacent to each other and the connecting member, and the receiving member is fixed to the concave portion into which the insertion portion provided in the connecting member is inserted and the concrete of the concrete member. The connecting member includes a pair of insertion portions inserted into each recess of each receiving member adjacent to each other, and a connecting portion connecting the pair of insertion portions, and the connecting members face each other. A member that is fitted between the inner wall surface of at least one of the facing walls of each recess of each receiving member and the inner surface of the insertion portion facing the inner wall surface to connect the facing wall and the inserting portion. The connecting member is a leading member installed between the inner wall surface of the facing wall facing each other and the inner surface of the insertion portion, and between the installed leading member and the inner wall surface of the facing wall, or. It is characterized in that it is provided with a trailing member fitted between the installed leading member and the inner surface of the insertion portion.
Further, the preceding member installed between the inner wall surface of the facing wall facing each other and the inner surface of the insertion portion is spaced apart from one of the inner wall surface of the facing wall facing each other and the inner surface of the insertion portion. The facing surfaces are formed as inclined surfaces so that the distance from the one surface increases toward the upper side, and the trailing member comes into contact with the inclined surface of the preceding member and the one surface. It is characterized in that it is configured to have a surface to be formed.
Further, the leading member is provided with a screw threading hole reaching from the inclined surface to the inside, the trailing member is provided with a screw through hole reaching from the upper surface to the inclined surface, and the screw through hole is a direction along the inclined direction of the inclined surface. Is formed in a long hole whose length is longer than the length in the direction along the inclined direction of the inclined surface of the screwed hole, and the inclined surface of the preceding member is formed so that the screw through hole and the screw threaded hole are continuous. It is characterized in that the leading member and the trailing member are connected by the screw passing through the screw through hole and being fastened to the screw threading hole in a state of being in contact with the inclined surface of the trailing member.
Further, each facing wall of each recess of each receiving member facing each other is provided with one side facing wall and the other side facing wall located on both sides of the groove for inserting the connecting portion of the connecting member from above, and is connected. The members are provided between the inner wall surface of the one-sided facing wall of the receiving member facing each other and the inner surface of the insertion portion, and the inner wall surface of the other facing wall of the receiving member facing each other and the inner surface of the insertion portion. It is characterized by being provided between them.
According to the joint of the concrete member according to the present invention, even if the receiving members embedded in the ends of the adjacent concrete members are displaced in the horizontal direction or the vertical direction, the receiving member and the connecting member are connected. You will be able to combine with.
The joint of a concrete member according to the present invention is a method of connecting concrete members using a joint, in which concrete members arranged so as to be adjacent to each other through a gap where end faces are joints. , A receiving member installed on the end side of each adjacent concrete member, a connecting member for connecting each adjacent receiving member, and a connecting means for connecting each adjacent receiving member and the connecting member. The receiving member includes a recess into which an insertion portion provided in the connecting member is inserted and a fixing portion fixed to the concrete of the concrete member, and the connecting member is inserted into each recess of each receiving member adjacent to each other. A pair of insertion portions to be joined to each receiving member and a connecting portion connecting the pair of insertion portions are provided, the connecting member includes a leading member and a trailing member, and the concrete member is connected by inserting. In the section installation step, one insertion portion of the connecting member is inserted into the recess of one receiving member to be installed, and the other insertion portion of the connecting member is inserted into the recess of the other receiving member to be installed. The step and the leading member installation step in which the leading member is installed between the inner wall surface of the facing wall facing each other and the inner surface of the insertion portion, and between the installed leading member and the inner wall surface of the facing wall, or It is characterized in that a trailing member installation step for inserting and installing the trailing member from above is provided between the installed leading member and the inner surface of the insertion portion.
According to the method for connecting concrete members according to the present invention, even when the receiving members embedded in the ends of the adjacent concrete members are displaced in the horizontal direction or the vertical direction, they are connected to the receiving members. It becomes possible to easily connect the members as designed.

The figure which looked at the connection structure of the floor slab from above (Embodiment 1). An exploded perspective view showing a joint (Embodiment 1). FIG. 3 is a perspective view showing a state in which each receiving member of the joint and the connecting member are connected by a connecting member (Embodiment 1). FIG. 5 is a plan view (Embodiment 1) showing a state in which each receiving member of the joint and the connecting member are connected by a connecting member. Explanatory drawing which shows the procedure of the connection method of adjacent floor slabs (Embodiment 1). Explanatory drawing which shows the procedure of the connection method of adjacent floor slabs (Embodiment 1). Explanatory drawing which shows the procedure of the connection method of adjacent floor slabs (Embodiment 1). FIG. 2 is a cross-sectional view showing a connection structure of adjacent floor slabs (Embodiment 2). FIG. 3 is a cross-sectional view showing a connection structure of adjacent floor slabs (Embodiment 3). FIG. 6 is a cross-sectional view showing a connection structure of adjacent floor slabs (Embodiment 4). FIG. 5 is a cross-sectional view showing a part of a connection structure of adjacent floor slabs (Embodiment 10). FIG. 5 is a cross-sectional view showing a part of a connection structure of adjacent floor slabs (Embodiment 10). FIG. 5 is a cross-sectional view showing a part of a connection structure of adjacent floor slabs (Embodiment 10). FIG. 11 is a perspective view showing a spacer of a floor slab connection structure (Embodiment 11). An exploded perspective view showing a spacer of a connection structure of a deck (Embodiment 11). FIG. 11 is a cross-sectional view showing a connection structure of a deck slab (Embodiment 11).

Embodiment 1
For example, as shown in FIG. 1, a bridge as a concrete member that is bridged over a plurality of non-figure main girders juxtaposed in the direction perpendicular to the bridge axis (bridge width direction) Y and adjacent to each other along the bridge axis direction X. The joint 1 according to the first embodiment for connecting the decks 10 and 10 made of concrete precast for use is the end portion 11 of one of the decks 10 and 10 adjacent to each other along the bridge axis direction X. The receiving member 2A installed on the side, the receiving member 2B installed on the end 11 side of the other deck 10 of the adjacent decks 10 and 10 along the bridge axis direction X, and the bridge axis direction. The connecting member 3 that connects the receiving member 2A installed at the end 11 of one of the decks 10 adjacent to each other along X and the receiving member 2B installed at the end 11 of the other deck 10 and adjacent to each other. It is configured to include a connecting member 4 for connecting the receiving members 2A and 2B and the connecting member 3.

Then, as shown in FIG. 1, the connecting structures of the floor slabs 10 and 10 adjacent to each other along the bridge axis direction X are arranged so as to be adjacent to each other through a gap where the end faces 11s and 11s are joints 15. The joints 1 and the joints 15 according to the first embodiment that connect the floor slabs 10 and 10, the spacers 5 installed in the gaps to be the joints 15, and the floor slabs 10 and 10 arranged adjacent to each other. It is a structure provided with a joint material 16 such as concrete or mortar filled in the gap.

As shown in FIGS. 2 and 3, one receiving member 2A is formed on the receiving portion 22A in which the recess 21A into which the one inserting portion 31A provided in the connecting member 3 is inserted is formed, and the concrete of the floor slab 10. It is provided with a fixing portion 23 such as a fixing muscle to be fixed.
The other receiving member 2B includes a receiving portion 22B in which a recess 21B into which the other inserting portion 31B provided in the connecting member 3 is inserted is formed, and a fixing portion 23 such as a fixing bar fixed to the concrete of the floor slab 10. And.
The receiving members 2A and 2B include a lower surface 2u (see FIG. 5A) formed on a parallel surface (flat surface) that makes surface contact with the horizontal surface when installed on the horizontal surface.

The receiving members 2A and 2B are installed on the end 11 side of the deck 10 so that the lower surface 2u is parallel to the lower surface 10u (see FIG. 5A), which is the flat plate surface of the deck 10. Therefore, when the floor slab 10 is installed so that the lower surface 10u is in contact with the horizontal surface, the lower surface 2u of the receiving members 2A and 2B becomes the horizontal surface.
Therefore, hereinafter, the direction orthogonal to the lower surface 10u of the deck 10 bridged over the plurality of main girders is defined as the vertical direction, and the end faces 11s of the decks 10 and 10 adjacent to each other along the bridge axis direction X, The horizontal direction (the direction perpendicular to the bridge axis (bridge width direction) Y) along 11s (see FIG. 1) will be defined as left and right.

As shown in FIG. 2, the connecting member 3 includes one insertion portion 31A inserted into the recess 21A of one receiving member 2A and the other insertion portion 31B inserted into the recess 21B of the other receiving member 2B. A connecting portion 32 for connecting the insertion portion 31A and the insertion portion 31B is provided.
The connecting portion 32 is formed by a flat plate that connects the central portion between the left and right sides of one insertion portion 31A and the central portion between the left and right sides of the other insertion portion 31B. The connecting portion 32 is formed of a flat plate having a plate thickness slightly narrower than the groove width of the connecting portion insertion groove 60 described later.
The connecting member 3 includes a lower surface 3u (see FIG. 6A) formed on a parallel surface (flat surface) that makes surface contact with the horizontal surface when installed on a horizontal surface.

As shown in FIG. 2, in the connecting member 3, the H-shaped upper surface 3t and the H-shaped lower surface 3u when viewed from above are formed on planes which face each other in parallel. The outer surfaces 3f and 3f of the insertion portions 31A and 31B are formed by planes that face each other in parallel and are perpendicular to the upper surface 3t and the lower surface 3u, and the inner surfaces 31a and 31b of the insertion portions 31A and 31B are parallel to each other. It is formed by a plane that faces the upper surface 3t and is perpendicular to the lower surface 3t and the lower surface 3u.
That is, the facing distance between the inner surface 31a of one insertion portion 31A and the inner surface 31b of the other insertion portion 31B is shorter than the facing distance between the outer surface 3f of the insertion portion 31A and the outer surface 3f of the insertion portion 31B.

As shown in FIGS. 2 and 3, the recesses 21A and 21B have a bottom plate 25 having a rectangular shape or a square shape, and one end edge side (for example, fixing) of a pair of end plates facing each other of the bottom plate 25. The end wall 26 provided so as to stand up from the side edge side on which the portion 23 is provided, and the left and right side walls 27 and 27 provided so as to stand up from the other pair of end edge sides of the bottom slab 25 facing each other. , Surrounded by an opposing wall 28 provided so as to stand up from the other edge side (for example, the veranda side opposite to the side on which the fixing portion 23 is provided) of the pair of opposite edge edges of the bottom slab 25. The upper part of the insertion portion insertion port into which the insertion portions 31A and 31B are inserted, that is, the opening 29 of the recesses 21A and 21B is surrounded by the end wall 26, the side walls 27 and 27, and the upper end edge of the facing wall 28. It is a structure formed by an opening.
The bottom slab 25 may have a shape in which the edge other than the edge on the side where the facing wall 28 rises is formed as a circular edge, a polygonal edge, or the like. That is, the recesses 21A and 21B include curved walls, polygonal walls, and the opposite wall 28 in which the left and right side walls 27, 27 and the end wall 26 that rise from the circular edge side or the polygonal edge side of the bottom slab 25 are integrated. The configuration may be formed so as to be surrounded by.

As shown in FIGS. 2 to 4, in order to insert the connecting portion 32 of the connecting member 3 at the left and right center positions of the facing walls 28 of the receiving members 2A and 2B installed on the end 11 side of the floor slab 10. The connecting portion insertion groove 60 is formed. The connecting portion insertion groove 60 is formed so as to extend from the opening 29 to the inner bottom surface 25a (see FIG. 4) side of the bottom slab 25.
Further, uneven portions 61 are formed on the outer surfaces of the left and right side walls 27 and 27 in order to increase the shear resistance and the adhesive force of the floor slab 10 with concrete.

As shown in FIG. 4, the facing walls 28 of the receiving members 2A and 2B are unilateral facing walls and the other side located on both sides of the connecting portion insertion groove 60 for inserting the connecting portion 32 of the connecting member 3 from above. It has an opposite wall. That is, the left side facing wall 28L as the one side facing wall located on the left side of the connecting portion insertion groove 60 and the right side facing wall 28R as the other side facing wall located on the right side of the connecting part insertion groove 60 are provided. ..

For example, as shown in FIG. 5A, the recess 21A and the inner bottom surface 25a of the bottom plate 25 of the recess 21B are formed in a plane parallel to the lower surface 2u, and the inner wall surface 26a and the side wall 27 of the gable wall 26 are formed. , 27 The inner wall surface 27a is formed in a plane perpendicular to the inner bottom surface 25a.
The inner wall surface 28a of the left facing wall 28L of the recess 21A, the inner wall surface 28c of the right facing wall 28R of the recess 21A, the inner wall surface 28b of the left facing wall 28L of the recess 21B, and the inner wall surface 28d of the right facing wall 28R of the recess 21B are , Is formed on a plane perpendicular to the inner bottom surface 25a of the bottom plate 25 (see FIGS. 2, 4, and 5 (a)).

As shown in FIG. 4, in the receiving members 2A and 2B, the receiving portions 22A and 22B are embedded in the end portion 11 side of the deck 10 with the opening 29 and the connecting portion insertion groove 60 exposed to the outside, and the end wall. A fixing portion 23 provided so as to extend from 26 to the center side of the floor slab 10 is embedded in the floor slab 10.
That is, after the receiving member 2A or the receiving member 2B is attached to the formwork (not shown) so that the opening 29 and the connecting portion insertion groove 60 are exposed to the outside and the other portion is embedded in the concrete of the floor slab 10. After the concrete is poured into the frame to harden the concrete, the receiving member 2A or the receiving member 2B is removed from the formwork and removed from the mold, so that the receiving member 2A or the receiving member 2B is embedded and fixed on the end 11 side. A concrete precast floor slab 10 for bridges is formed.

The spacer 5 is a left facing wall 28L of the receiving members 2A and 2B adjacent to each other in a gap portion serving as a joint 15 between the end faces 11s and 11s of the floor slabs 10 and 10 arranged so as to be adjacent to each other. , 28L outer wall surfaces 62 and 62, and right side facing walls 28R and 28R outer wall surfaces 63 and 63 facing each other are installed at two locations (see FIGS. 2 and 4).

The spacer 5 includes a leading spacer 5A installed in contact with one of the outer wall surfaces 62, 63 of the outer wall surfaces of the facing walls 28, 28 of the receiving members 2A, 2B facing each other, and the leading spacer 5A. It is composed of 5A and a trailing spacer 5B fitted between the other outer wall surfaces 62 and 63 of the outer wall surfaces of the facing walls 28 and 28 of the receiving members 2A and 2B facing each other.
Specifically, as shown in FIG. 4, two spacers 5, 5 ... Are used.
That is, the first spacer 5 includes a leading spacer 5A installed in contact with the outer wall surface 62 of the left facing wall 28L of one receiving member 2A, and the left facing wall of the leading spacer 5A and the other receiving member 2A. It is composed of a trailing spacer 5B fitted between the 28L outer wall surface 62.
The second first spacer 5 is a leading spacer 5A installed in contact with the outer wall surface 63 of the right facing wall 28R of one receiving member 2A, and the leading spacer 5A and the other receiving member 2A facing each other on the right side. It is composed of a trailing spacer 5B fitted between the wall 28R and the outer wall surface 63.
By using the spacer 5 composed of the leading spacer 5A and the trailing spacer 5B, the width dimension of the joint 15, that is, the opposing walls 28, 28 of the receiving members 2A, 2B adjacent to each other are opposed to each other. It becomes possible to cope with the increase and decrease of the dimensions between.

As shown in FIGS. 2 and 5A, for example, the leading spacer 5A is installed in a gap serving as a joint 15, and the facing wall 28 of one receiving member 2A (the outer wall surface 62 of the left facing wall 28L) or A surface (vertical surface) 5a that functions as a mounting surface formed on a flat surface that faces the outer wall surface 63) of the right facing wall 28R and extends vertically and horizontally, and an inclined surface that faces the surface 5a and is inclined in the vertical direction. It is formed in a shape including 5b, an upper surface connecting the upper end edge of the surface 5a and the upper end edge of the inclined surface 5b, and a lower surface connecting the lower end edge of the surface 5a and the lower end edge of the inclined surface 5b.
The inclined surface 5b of the leading spacer 5A is formed on an inclined surface that gradually approaches the surface 5a from the lower end edge toward the upper end edge in a state where the leading spacer 5A is installed in the gap serving as the joint 15.

As shown in FIGS. 2 and 5C, for example, the trailing spacer 5B is installed in the gap serving as the joint 15, and the facing wall 28 of the other receiving member 2B (the outer wall surface 62 of the left facing wall 28L). Alternatively, a surface (vertical surface) 5a formed on a plane extending vertically and horizontally and facing the outer wall surface 63) of the right side facing wall 28R, an inclined surface 5b facing the surface 5a and inclined in the vertical direction, and the said It is formed in a shape including an upper surface connecting the upper end edge of the surface 5a and the upper end edge of the inclined surface 5b, and a lower surface connecting the lower end edge of the surface 5a and the lower end edge of the inclined surface 5b.
The inclined surface 5b of the trailing spacer 5B is formed on an inclined surface gradually moving away from the surface 5a from the lower end edge toward the upper end edge in a state where the trailing spacer 5B is installed in the gap serving as the joint 15.

In other words, the leading spacer 5A and the trailing spacer 5B are formed in a block body having a trapezoidal vertical cross section in a state of being installed in the gap serving as the joint 15. The angle between the lower base of the trapezoid and one leg of the trapezoid is 90 °.
Then, the leading spacer 5A is installed in the gap serving as the joint 15 so that the lower surface including the lower bottom of the trapezoid is located downward (see FIG. 5A).
Further, the trailing spacer 5B is installed in the gap serving as the joint 15 so that the lower surface including the upper bottom of the trapezoid is located downward (see FIG. 5C).

In the connecting member 4, the receiving member 2A and the receiving member 2B are installed so as to be adjacent to each other, and one insertion portion 31A of the connecting member 3 is inserted into the recess 21A of the one receiving member 2A and the other of the connecting member 3. Is inserted into the recess 21B of the other receiving member 2B, and then between the facing wall 28 of the recess 21A of the one receiving member 2A and the one inserting portion 31A, and the recess of the other receiving member 2B. It is installed between the facing wall 28 of 21B and the other insertion portion 31B (see FIG. 7B).

Specifically, as shown in FIG. 4, the coupling member 4 receives one of the inner wall surface 28a of the left side facing wall 28L of the recess 21A of the one receiving member 2A and the inner surface 31a of the one inserting portion 31A. Between the inner wall surface 28c of the right side facing wall 28R of the recess 21A of the member 2A and the inner surface 31a of one insertion portion 31A, the inner wall surface 28b of the left facing wall 28L of the recess 21B of the other receiving member 2B and the other insertion portion 31B. It is installed at four locations between the inner surface 31b of the other receiving member 2B, the inner wall surface 28d of the right side facing wall 28R of the recess 21B of the other receiving member 2B, and the inner surface 31b of the other insertion portion 31B.

Then, the coupling member 4 has a leading member 4A installed so as to face one of the inner wall surface of the facing wall facing each other and the inner surface of the insertion portion, and the leading member 4A facing each other. It is composed of a trailing member 4B fitted between the inner wall surface of the wall and the other surface of the inner surface of the insertion portion.

As shown in FIG. 7A, for example, the leading member 4A is inserted between the facing wall 28 of one receiving member 2A and one insertion portion 31A, and between the facing wall 28 of the other receiving member 2B and the other. It is inserted between the portion 31B, the lower surface is placed on the inner bottom surface 25a, and the surface 4b described later is arranged so as to face parallel to the facing wall 28.
The leading member 4A is inserted between the facing wall 28 of one receiving member 2A and one insertion portion 31A, or between the facing wall 28 of the other receiving member 2B and the other insertion portion 31B, and the lower surface thereof. A surface (vertical surface) 4b formed on a flat surface extending vertically and horizontally, an inclined surface 4a that faces the surface 4b and is inclined in the vertical direction, and the surface 4b. It is formed in a shape including an upper surface connecting the upper end edge of the surface 4a and the upper end edge of the inclined surface 4a, and a lower surface connecting the lower end edge of the surface 4b and the lower end edge of the inclined surface 4a.
The inclined surface 4a of the leading member 4A is formed on an inclined surface that gradually approaches the surface 4b from the lower end edge toward the upper end edge in a state where the lower surface of the leading member 4A is placed on the inner bottom surface 25a.

As shown in FIG. 7B, for example, the trailing member 4B is located between the installed leading member 4A and one insertion portion 31A, or between the installed leading member 4A and the other insertion portion 31B. A plane (vertical plane) 4b formed on a plane extending vertically and horizontally facing the inner surface 31a of one insertion portion 31A or the inner surface 31b of the other insertion portion 31B in a state of being inserted into the above surface. An inclined surface 4a that is inclined in the vertical direction facing 4b and comes into contact with the inclined surface 4a of the preceding member 4A installed earlier, an upper surface that connects the upper end edge of the surface 4b and the upper end edge of the inclined surface 4a, and the said It is formed in a shape including a lower end edge of the surface 4b and a lower surface connecting the lower end edge of the inclined surface 4a.
The inclined surface 4a of the trailing member 4B is in a state where the trailing spacer 4B is installed between the leading member 4A and one insertion portion 31A, or between the leading member 4A and the other insertion portion 31B. It is formed on an inclined surface gradually moving away from the surface 4b from the lower end edge toward the upper end edge.

In other words, the leading member 4A and the trailing member 4B are formed in a block body having a trapezoidal vertical cross section in the installed state. The angle between the lower base of the trapezoid and one leg of the trapezoid is 90 °.
Then, the leading member 4A is installed so that the lower surface including the trapezoidal lower bottom is placed on the inner bottom surface 25a.
Further, the trailing member 4B is installed so that the lower surface including the upper bottom of the trapezoid is located downward.

In the first embodiment, specifically, as shown in FIGS. 4, 7 (a) and 7 (b), the receiving members 2A and 2B adjacent to each other and the connecting member 3 are four connecting members. It has a structure connected by 4, 4 ...
That is, in the first coupling member 4, the surface 4b faces parallel to the inner wall surface 28a of the left side facing wall 28L of the recess 21A of one receiving member 2A with the lower surface mounted on the inner bottom surface 25a. It is composed of a leading member 4A installed in the above, and a trailing member 4B fitted between the installed leading member 4A and the inner surface 31a of one of the insertion portions 31A.
The second coupling member 4 is installed so that the surface 4b faces parallel to the inner wall surface 28c of the right side facing wall 28R of the recess 21A of one receiving member 2A with the lower surface mounted on the inner bottom surface 25a. It is composed of a leading member 4A that has been formed, and a trailing member 4B that is fitted between the installed leading member 4A and the inner surface 31a of one of the insertion portions 31A.
The third coupling member 4 is installed so that the surface 4b faces the inner wall surface 28b of the left side facing wall 28L of the recess 21B of the other receiving member 2B in a state where the lower surface is placed on the inner bottom surface 25a. It is composed of a leading member 4A that has been formed, and a trailing member 4B that is fitted between the installed leading member 4A and the inner surface 31b of the other insertion portion 31B.
The fourth coupling member 4 is installed so that the surface 4b faces the inner wall surface 28d of the right side facing wall 28R of the recess 21B of the other receiving member 2B in a state where the lower surface is placed on the inner bottom surface 25a. It is composed of a leading member 4A that has been formed, and a trailing member 4B that is fitted between the installed leading member 4A and the inner surface 31b of the other insertion portion 31B.

Next, a method of connecting the floor slabs 10 and 10 will be described in detail.
First, as shown in FIG. 5A, in advance on the facing wall 28 of the receiving member 2A of, for example, one of the decks 10 and 10 installed so as to be adjacent to each other along the bridge axis direction X. The leading spacer 5A is installed.
The leading spacer 5A is installed, for example, as shown in FIG. 4, the outer wall surface 62 of the left facing wall 28L of the receiving member 2A and the outer wall surface 63 of the right facing wall 28R, or the leading spacer facing the outer wall surfaces 62, 63. After applying an adhesive to at least one of the surfaces 5a of the 5A, the surface 5a of the leading spacer 5A and the outer wall surface 62 or the outer wall surface 63 of the facing wall 28 are adhered to the outer wall surface 62 and the outer wall surface 63. A leading spacer 5A is attached to each.
That is, the leading spacer 5A installed so that the surface 5a is in contact with the outer wall surface 62 of the left side facing wall 28L of one receiving member 2A is the surface facing the outer wall surface 62 of the left side facing wall 28L of the other receiving member 2B. Is formed on the inclined surface 5b so that the distance between the left side facing wall 28L and the outer wall surface 62 of the other receiving member 2B becomes larger toward the upper side (see FIG. 5A).
Similarly, the leading spacer 5A installed so that the surface 5a is in contact with the outer wall surface 63 of the right side facing wall 28R of one receiving member 2A faces the outer wall surface 63 of the right side facing wall 28R of the other receiving member 2B. The surface is formed on an inclined surface 5b such that the distance between the other receiving member 2B and the outer wall surface 63 of the right side facing wall 28R increases toward the upper side (see FIG. 5A).

Then, as shown in FIG. 5A, one floor slab 10 to which the leading spacer 5A is attached is installed on the girder, and the opposite wall 28 of the receiving member 2B of the other floor slab 10 and one floor slab are installed. The other floor slab 10 is installed on the girder so that the facing wall 28 of the receiving member 2A of 10 faces the facing wall 28 via the joint width.
Next, as shown in FIGS. 5 (b), 5 (c), and 4, the outer wall surface 62 of the left facing wall 28L of the receiving member 2B of the other deck 10 and the inclined surface 5b of the leading spacer 5A In the installation space formed between the floor slabs 10 and the outer wall surface 63 of the right facing wall 28R of the receiving member 2B of the other deck 10 and the inclined surface 5b of the leading spacer 5A, respectively, the rear Insert the row spacer 5B and install it.
That is, the surface 5a of one trailing spacer 5B and the outer wall surface 62 of the left facing wall 28L of the receiving member 2B of the other deck 10 are brought into contact with each other, and the inclined surface 5b of the trailing spacer 5B and the leading spacer 5A are brought into contact with each other. While making contact with the inclined surface 5b, the one trailing spacer 5B is pushed downward to fit the one trailing spacer 5B into the installation space.
Similarly, the surface 5a of the other trailing spacer 5B and the outer wall surface 63 of the right facing wall 28R of the receiving member 2B of the other deck 10 are brought into contact with each other, and the inclined surface 5b of the trailing spacer 5B and the leading spacer are brought into contact with each other. While contacting the inclined surface 5b of 5A, the trailing spacer 5B is pushed downward to fit the trailing spacer 5B into the installation space.
That is, the trailing spacers 5B and 5B are formed on the outer wall surface 62 and the right side facing wall 28L of the left side facing wall 28L of the inclined surfaces 5b and 5b and the other receiving member 2B that come into contact with the inclined surfaces 5b and 5b of the preceding spacers 5A and 5A. It is configured to have surfaces 5a and 5a that come into contact with the outer wall surface 63 (see FIGS. 5 (c) and 4).
As described above, spacers 5 are installed between the outer wall surfaces 62 and 62 of the left side facing walls 28L and 28L facing each other and between the outer wall surfaces 63 and 63 of the right side facing walls 28R and 28R facing each other (FIG. FIG. 5 (c), see FIG. 4).
By using such a spacer 5, even if the width dimension of the joint 15 varies, it becomes possible to deal with it.

Next, as shown in FIG. 6, one insertion portion 31A of the connecting member 3 is inserted into the recess 21A of one receiving member 2A, and the other inserting portion 31B of the connecting member 3 is inserted into the recess 21B of the other receiving member 2B. Inserted into 21B, the lower surface 3u of one insertion portion 31A is placed on the inner bottom surface 25a of the recess 21A of one receiving member 2A, and the lower surface 3u of the other inserting portion 31B is placed in the recess 21B of the other receiving member 2B. It is placed on the inner bottom surface 25a of the.
In this case, as shown in FIGS. 6A and 4, the connecting member 4 is formed by connecting the inner surface 31a of one insertion portion 31A and the inner wall surfaces 28a and 28c of the facing wall 28 of the recess 21A of the one receiving member 2A. The coupling member 4 is opposed to each other in parallel with a predetermined interval for installation, and the inner surfaces 31b of the other insertion portion 31B and the inner walls 28b and 28d of the facing wall 28 of the recess 21B of the other receiving member 2B are connected to each other. Are opposed to each other in parallel with a predetermined interval for installation.

Then, as shown in FIGS. 7A and 4, the surfaces 4b, 4b ... Of the preceding members 4A, 4A ... Of the connecting members 4, 4 ... Are with the inner wall surfaces 28a, 28c, 28b, 28d, respectively. The leading members 4A, 4A ... Are installed at four predetermined positions so as to face each other and the lower surface is placed on the inner bottom surface 25a.
Next, as shown in FIGS. 7A and 4, one of the surfaces 4a and 4a of the preceding members 4A, 4A ... Installed so that the surfaces 4b and 4b face the inner wall surfaces 28a and 28c is inserted. The coupling member fitting spaces 4u and 4u formed between the inner surfaces 31a and 31a of the portion 31A, and the preceding members 4A and 4A installed so that the surfaces 4b and 4b face the inner wall surfaces 28b and 28d. The trailing members 4B, 4B, 4B, 4B are fitted into the coupling member fitting spaces 4u, 4u formed between the surfaces 4a, 4a of the above surface and the inner surfaces 31b, 31b of the other insertion portion 31B, respectively.
That is, the leading member 4A installed between the inner wall surface of the facing wall facing each other and the inner surface of the insertion portion is one surface of the inner wall surface of the facing wall facing each other and the inner surface of the insertion portion (FIG. 7 (FIG. 7). The surfaces facing the inner surfaces 31a, 31a, 31b, 31b) of a) at intervals are formed on the inclined surface 4a so that the distance from the one surface increases toward the upper side, and the trailing member 4B is formed. As shown in FIG. 7B, the preceding member 4A is configured to have an inclined surface 4a in contact with the inclined surface 4a and a surface 4b in contact with one of the inclined surfaces.
In this case, by fitting each trailing member 4B, 4B ... into each coupling member fitting space 4u, 4u ..., each leading member 4A is pressed by each trailing member 4B, and the surface 4b of each leading member 4A and each The inner surfaces 31a and 31b of the insertion portions 31A and 31B are in strong contact with each other, and the inclined surface 4a of each trailing member 4B and the inclined surface 4a of each leading member 4A are in strong contact with each other. The surface 4b of the trailing member 4B and the inner wall surfaces 28a, 28c, 28b, 28d of each facing wall 28 are in a state of being firmly in contact with each other.
Therefore, by the connecting member 4 composed of the leading member 4A and the trailing member 4B, one insertion portion 31A and one receiving member 2A are brought into close contact with each other and are coupled in a fixed state, and the other insertion portion 31B. And the other receiving member 2B are connected in a fixed state, and the floor slabs 10 and 10 adjacent to each other are connected to each other.
Further, in the insertion portion 31B of the connecting member 3, the connecting members 4, 4, 4, 4 are installed so as to correspond to the pair of inner surfaces 31a, 31a, 31b, 31b adjacent to each other on the left and right sides of the connecting portion 32, respectively. In the connection between the receiving members 2A and 2B and the connecting member 3, the left and right balance can be maintained in a good fixed state (see FIG. 4).

Further, after the adjacent floor slabs 10 and 10 are connected by the joint 1 along the bridge axis direction X, they are connected to the recesses 21A and 21B and the recesses 21A and 21B as shown in FIG. 7 (c). By filling the joint material 16 above the member 3, it is possible to prevent the connecting member 3 from coming off from the recesses 21A and 21B, and as shown in FIG. 1, between the end faces 11s and 11s of the adjacent floor slabs 10 and 10. By filling the joint material 15 which is the gap between the two, the joints of the floor slabs 10 and 10 adjacent to each other are completed.

That is, in the method of connecting the floor slabs according to the first embodiment, the receiving members 2A adjacent to each other in the gap portion serving as the joint 15 between the end faces 11s and 11s of the floor slabs 10 and 10 arranged so as to be adjacent to each other. , 2B, spacer installation steps for installing spacers 5 between the outer walls 62 and 62 of the left facing walls 28L and 28L facing each other and between the outer walls 63 and 63 of the right facing walls 28R and 28R facing each other, respectively. One insertion portion 31A of the connecting member 3 is inserted into the recess 21A of one receiving member 2A and installed, and the other insertion portion 31B of the connecting member 3 is inserted into the recess 21B of the other receiving member 2B and installed. The insertion portion installation step and the leading member 4A constituting the coupling member 4 are formed by the inner wall surfaces 28a, 28c, 28b, 28d of the facing walls 28 facing each other and the inner surfaces 31a, 31a, 31b, 31b of the insertion portions 31A, 31B. A trailing member 4B constituting the coupling member 4 is provided from above between the leading member installation step to be installed between the preceding member 4A and the inner surfaces 31a, 31a, 31b, 31b of the inserted portions 31A, 31B. It is a connection method provided with a trailing member installation step of fitting and installing.
According to the floor slab connecting method according to the first embodiment, there is a case where the receiving members 2A and 2B embedded in the ends of the adjacent floor slabs 10 and 10 are displaced in the horizontal direction and the vertical direction. However, the receiving members 2A and 2B and the connecting member 3 can be easily connected as designed.

When the spacer 5 is installed in the gap serving as the joint 15 as in the connection structure of the floor slab 10 according to the first embodiment, the spacer 5 functions as a reaction force device. That is, when the insertion portions 31A and 31B of the connecting member 3 are inserted into the recesses 21A and 21B of the receiving members 2A and 2B and the connecting member 4 is fitted into the connecting member fitting space 4u, the connecting member 3 is in the horizontal direction. Tensile force is generated. Therefore, a force acts in the direction of attracting the floor slabs 10 and 10 to each other through the contact portions between the receiving members 2A and 2B and the connecting member 3 and the connecting member 4. At this time, if the attractive force is larger than the frictional resistance between the floor slab 10 installed on the main girder and the main girder, the floor slabs 10 and 10 tend to come too close to each other. There is a possibility that the 2B and the connecting member 3 are not firmly integrated.
However, in the first embodiment, the spacers 5 installed between the facing walls 28 and 28 of the receiving members 2A and 2B facing each other across the joint portion function as a reaction force device, so that the floor slabs 10 and 10 are connected to each other. It is possible to suppress the pulling force acting in the pulling direction, and prevent the floor slabs 10 and 10 from trying to come too close to each other.
Further, a reverse force (reaction force) corresponding to the force acting in the direction of attracting the floor slabs 10 and 10 to each other is applied from the spacer 5 to the outer surfaces (outer wall surfaces 62 and 62) of the facing walls 28 and 28 of the receiving members 2A and 2B. And, by being applied to the outer wall surfaces 63, 63), the receiving members 2A and 2B and the connecting member 3 can be firmly integrated.

Further, as in the connection structure of the floor slab 10 according to the first embodiment, the spacer 5 is installed between the gaps serving as joints 15, that is, between the opposing walls 28 and 28 of the receiving members 2A and 2B adjacent to each other. In this case, the stress and strain on the upper edge side and the lower edge side of the joint portion where the joint 1 and the joint 15 are filled with the joint material 16 are reduced.

Further, since the stress degree of the joint 1 is reduced, the cross-sectional dimension of the joint 1 can be reduced, so that the manufacturing cost of the joint 1 can be reduced and the inexpensive joint 1 can be used. Further, since the stress generated in the joint 1 can be reduced, the fatigue resistance of the joint 1 can be improved.

Further, in the first embodiment, the tensile force applied to the connecting member 3 and the reaction force of the spacer 5 are balanced, and no tensile stress is generated in each of the floor slabs 10 and 10, so that cracking of the floor slab 10 can be suppressed.
Further, since the stress generated on the upper edge side, the lower edge side, and the joint 1 of the joint portion is reduced, cracking of the joint portion can be suppressed.
In this way, since cracks in the floor slab 10 and the joint portion can be suppressed, salt damage and freezing such as reinforcement corrosion and concrete peeling due to rainwater and chloride invading from the crack portion can be prevented, and the floor slab 10 and the joint portion can be prevented from freezing. Durability is improved.
That is, according to the connection structure of the first embodiment, the floor slabs 10 and 10 can be firmly integrated with each other by using the joint 1, and the stress applied to the floor slab 10, the joint 1, and the joint portion can be reduced. 10 and the occurrence of cracks in the joint portion can be suppressed.

Further, according to the first embodiment, as the spacer 5, the leading spacer 5A installed in contact with one of the receiving members 2A and 2B facing each other, the leading spacer 5A and the other receiving member Since the spacer 5 composed of the trailing spacer 5B that functions as a connecting member fitted between the joints 15 is used, the width dimension of the joint 15, that is, the receiving members 2A and 2B that are adjacent to each other are opposed to each other. It is possible to increase or decrease the dimensions between the walls 28 and 28.
That is, even if the width dimension of the joint 15 is not constant due to the manufacturing accuracy of the floor slab 10 or the installation error of the floor slab 10, by using the spacer 5, the function of securing the joint spacing and the receiving member The function as a reaction force device for transmitting axial force between 2A and 2B and introducing prestress to receiving members 2A and 2B is effectively exhibited, and the receiving members 2A and 2B and the connecting member 3 are firmly integrated. Further, spacers 5 are provided between the outer wall surfaces 62 and 62 of the left side facing walls 28L and 28L of the receiving members 2A and 2B facing each other, and the receiving members 2A and 2B facing each other are provided. Since the spacer 5 is provided between the outer wall surfaces 63 and 63 of the right facing walls 28R and 28R, the function of ensuring the joint spacing, the axial force transmission between the receiving members 2A and 2B, and the receiving members 2A and 2B The function as a reaction force device for introducing prestress is effectively exhibited, and the receiving members 2A and 2B and the connecting member 3 can be firmly integrated.
Further, between the outer wall surfaces 62 and 62 of the left side facing walls 28L and 28L of the receiving members 2A and 2B facing each other, and the outer wall surfaces 63 of the right side facing walls 28R and 28R of the receiving members 2A and 2B facing each other. By providing spacers 5 between the receiving members 2A and 63, the vicinity of the boundary portion 66 (see FIG. 4) between the left side facing walls 28L and the side wall 27 of the receiving members 2A and 2B and the right side facing the receiving members 2A and 2B. The stress in the vicinity of the boundary portion 66 between the wall 28R and the side wall 27 is reduced, and the effect of suppressing fatigue failure in the vicinity of the boundary portion 66 can also be obtained.

Further, according to the joint 1 according to the first embodiment, by using the coupling member 4 composed of the leading member 4A and the trailing member 4B, the floor slabs 10 and 10 adjacent to each other along the bridge axis direction X are used. Even when the receiving members 2A and 2B embedded in the ends 11 and 11 are displaced in the horizontal direction and the vertical direction, the connecting member 3 and the receiving members 2A and 2B can be connected to each other. ..

Further, according to the floor slab connection structure according to the first embodiment, the spacer 5 composed of the leading spacer 5A and the trailing spacer 5B, and the connecting member 4 composed of the leading member 4A and the trailing member 4B. By using the above, the spacer 5 and the coupling member 4 function as a reaction force device for transmitting the axial force between the receiving members 2A and 2B and introducing prestress to the receiving members 2A and 2B. Due to the synergistic effect of the spacer 5 and the connecting member 4, the receiving members 2A and 2B and the connecting member 3 can be more firmly integrated.
Further, between the outer wall surfaces 62 and 62 of the left side facing walls 28L and 28L of the receiving members 2A and 2B facing each other, and the outer wall surfaces 63 of the right side facing walls 28R and 28R of the receiving members 2A and 2B facing each other. Spacers 5 are provided between the inner wall surfaces 28a and 63, and between the inner wall surfaces 28a and 28c and the inner surfaces 31a and 31a of one insertion portion 31A, and between the inner wall surfaces 28b and 28d and the inner surface 31b of the other insertion portion 31b. Since the coupling member 4 is provided between the receiving members 2A and 31b, the vicinity of the boundary portion 66 (see FIG. 4) between the left side facing wall 28L and the side wall 27 of the receiving members 2A and 2B, and the receiving members 2A and 2B. The stress in the vicinity of the boundary portion 66 between the right side facing wall 28R and the side wall 27 is further reduced, and the effect of suppressing fatigue fracture in the vicinity of the boundary portion 66 is enhanced.

Further, according to the joint 1 according to the first embodiment, the inner wall surfaces 28a, 28c, 28b, 28d of the facing wall 28 of one receiving member 2A and the other receiving member 2B are formed on a vertical surface perpendicular to the inner bottom surface 25a. Since this configuration may be used, one receiving member 2A and the other receiving member 2B can have the same shape, and the member cost can be reduced. Further, since the shapes of the receiving member 2A and the receiving member 2B can be simplified, the receiving member 2A and the receiving member 2B can be easily manufactured, and the manufacturing cost can be reduced.

Embodiment 2
In the joint 1, as shown in FIG. 8, the leading members 4A constituting the coupling member 4 face each other with the inner walls 28a, 28c, 28b, 28d of the facing walls 28 and the inner surfaces 31a, 31a, 31b, 31b of the insertion portion. The trailing member 4B forming the coupling member 4 is fitted from above between the installed leading member 4A and the inner wall surfaces 28a, 28c, 28b, 28d of the facing wall 28. The configuration may be such that the inclined surface 4a of the trailing member 4B and the inclined surface 4a of the leading member 4A are in contact with each other.

Embodiment 3
As shown in FIG. 9, the joint 1 brings the left and right inner surfaces 31a and 31a of one insertion portion 31A of the connecting member 3 into contact with the left and right inner walls 28a and 28c of the facing wall 28 of the one receiving member 2A. , The leading members 4A constituting the coupling member 4 are installed between the left and right inner wall surfaces 28b and 28d of the other facing wall 28 facing each other and the left and right inner surfaces 31b and 31b of the other insertion portion 31B. The trailing member 4B constituting the coupling member 4 is fitted from above between the preceding member 4A and the left and right inner surfaces 31b and 31b of the other insertion portion 31B, and precedes the inclined surface 4a of the trailing member 4B. The configuration may be such that the member 4A is installed in contact with the inclined surface 4a.

Embodiment 4
As shown in FIG. 10, the joint 1 is in contact with the left and right inner surfaces 31a and 31a of one insertion portion 31A of the connecting member 3 and the left and right inner walls 28a and 28c of the facing wall 28 of the one receiving member 2A. , The leading members 4A constituting the coupling member 4 are installed between the left and right inner wall surfaces 28b and 28d of the other facing wall 28 facing each other and the left and right inner surfaces 31b and 31b of the other insertion portion 31B. A trailing member 4B constituting the coupling member 4 is fitted from above between the preceding member 4A and the left and right inner wall surfaces 28b and 28d of the other facing wall 28, and the trailing member 4B and the inclined surface 4a of the trailing member 4B are inserted. The configuration may be such that the preceding member 4A is installed in contact with the inclined surface 4a.

Embodiment 5
Although not shown, in the joint 1, the left and right inner surfaces 31b and 31b of the other insertion portion 31B of the connecting member 3 and the left and right inner walls 28b and 28d of the facing wall 28 of the other receiving member 2B are brought into contact with each other. Between the left and right inner wall surfaces 28a and 28c of one facing wall 28 facing each other and the left and right inner surfaces 31a and 31a of the one insertion portion 2A, the inclined surface 4a of the trailing member 4B and the inclined surface 4a of the leading member 4A. The coupling member 4 may be installed in a state where the coupling member 4 is in contact with the vehicle.

Embodiment 6
In the first to fifth embodiments, the leading spacers 5A installed between the receiving members 2A and the receiving members 2B facing each other have their upper and lower center positions at the upper and lower center positions of the receiving members 2A and 2B, or Preceding member 4A installed so as to be located near the central position and in contact with one of the inner wall surface of the facing wall facing each other and the inner surface of the insertion portion. Is configured so that the upper and lower center positions are located at the upper and lower center positions of the receiving members 2A and 2B, or in the vicinity of the center position.
For example, as shown in FIGS. 5 to 10, a horizontal line passing through a central position between the upper and lower sides of the facing walls 28 and 28 of the receiving members 2A and 2B (that is, an intermediate position between the upper end and the lower end of the facing wall 28). The spacer 5 and the connecting member 4 are installed so that the horizontal line passing through the central position between the upper and lower parts of the leading spacer 5A and the horizontal line passing through the central position between the upper and lower parts of the leading member 4A are the same horizontal line 65. The configuration was made.
As in the sixth embodiment, the leading spacer 5A and the leading member 4A are installed so that the upper and lower center positions are located at the upper and lower center positions of the receiving members 2A and 2B or near the center position. Then, by the synergistic effect of the spacer 5 and the coupling member 4, the function of securing the joint spacing, the axial force transmission between the receiving members 2A and 2B, and the reaction force device for introducing the prestress to the receiving members 2A and 2B. The functions of the above are more effectively exhibited, and the receiving members 2A and 2B and the connecting member 3 can be firmly integrated.

Embodiment 7
As the spacer 5 and the coupling member 4, the spacer 5 and the coupling member 4 made of a casting were used. For example, a spacer 5 and a bonding member 4 formed of spheroidal graphite cast iron were used.
According to the seventh embodiment, since the spacer 5 and the coupling member 4 formed of casting are used, the spacer 5 and the coupling member 4 having excellent weather resistance and corrosion resistance are obtained, and the spacer 5 and the coupling member 4 are excellent in weather resistance and corrosion resistance. It becomes possible to maintain an excellent bonding structure.

8th Embodiment
In the spacer 5, at least one of the inclined surface 5b of the leading spacer 5A and the inclined surface 5b of the trailing spacer 5B, which are in contact with each other, is formed on a roughened surface, whereby the leading spacer 5 is formed. By increasing the frictional force between the inclined surface 5b of 5A and the inclined surface 5b of the trailing spacer 5B, it is possible to prevent the inclined surfaces 5b and 5b from shifting from each other. The function as a reaction force device for transmitting the axial force and introducing prestress to the receiving members 2A and 2B has come to be exhibited more effectively, and the receiving members 2A and 2B and the connecting member 3 are firmly integrated. It becomes possible to change.

Embodiment 9
In the coupling member 4, at least one of the inclined surface 4a of the leading member 4A and the inclined surface 4a of the trailing member 4B, which are in contact with each other, is formed as a roughened surface. By increasing the frictional force between the inclined surface 4a of the member 4A and the inclined surface 4a of the trailing member 4B, it is possible to prevent the inclined surfaces 4a and 4a from shifting from each other. The function as a reaction force device for transmitting the axial force between the joints and introducing the prestress to the receiving members 2A and 2B has become more effective, and the receiving members 2A and 2B and the connecting member 3 are firmly connected to each other. Integration is possible.

Embodiment 10
As a variation of the configuration of the inner wall surface of the facing wall 28 of the connecting member 4 and the receiving members 2A and 2B and the inner surface of the insertion portions 31A and 31B of the connecting member 3, for example, there are the configurations shown in FIGS. 11 to 13.
In FIG. 11, the inner walls 28b and 28d of the facing wall 28 of the other receiving member 2B are formed on a vertical surface, and the inner surface 31b of the other insertion portion 31B gradually faces the facing wall 28 from the lower end edge to the upper end edge. The variation of the coupling member 4 in the case where the structure is formed on the inclined surface away from the inner wall surfaces 28b and 28d of the above is shown.
In FIG. 11A, a flat plate-shaped (rectangular cross-section) leading member 4A having a plate surface parallel to the inner wall surfaces 28b and 28d is installed on the inner wall surface 28b and 28d side, and the leading member 4A and the other The configuration in which the trailing member 4B is fitted and installed between the inner surfaces 31b and 31b of the insertion portion 31B is shown.
In FIG. 11B, a leading member 4A having a trapezoidal cross section is installed on the inner wall surfaces 28b and 28d, and an inverted trapezoidal cross section is formed between the leading member 4A and the inner surfaces 31b and 31b of the other insertion portion 31B. The configuration in which the trailing member 4B is fitted and installed is shown.
In FIG. 11C, a leading member 4A having a parallelogram cross section having an inclined surface parallel to the inclined surface of the inner surfaces 31b and 31b is installed on the inner surfaces 31b and 31b side of the other insertion portion 31B, and the preceding member 4A is installed. The configuration in which the trailing member 4B having an inverted trapezoidal cross section is fitted between the member 4A and the inner wall surfaces 28b and 28d of the facing wall 28 of the other receiving member 2B is shown.
In FIG. 12, the inner surfaces 31b and 31b of the other insertion portion 31B are formed on a vertical surface, and the inner walls 28b and 28d of the facing wall 28 of the other receiving member 2B gradually become the other from the lower end edge to the upper end edge. The variation of the coupling member 4 in the case where the structure is formed on the inclined surface away from the inner surfaces 31b and 31b of the insertion portion 31B is shown.
FIG. 12A shows a flat plate-shaped (rectangular cross-section) leading member 4A having a plate surface parallel to the inner surfaces 31b and 31b of the other insertion portion 31B on the inner surfaces 31b and 31b side of the other insertion portion 31B. A configuration is shown in which a trailing member 4B having an inverted trapezoidal cross section is inserted between the leading member 4A and the inner walls 28b and 28d of the facing wall 28 of the other receiving member 2B.
FIG. 12B shows a leading member 4A having a parallelogram cross section having an inclined surface parallel to the inclined surface of the inner wall surface 28b, 28d on the inner wall surface 28b, 28d side of the facing wall 28 of the other receiving member 2B. Is installed, and a trailing member 4B having an inverted trapezoidal cross section is fitted between the leading member 4A and the inner surfaces 31b and 31b of the other insertion portion 31B.
In FIG. 12 (c), the leading member 4A having a trapezoidal cross section is installed on the inner surface 31b, 31b side of the other insertion portion 31B, and the inner wall surfaces 28b, 28d of the facing wall 28 of the leading member 4A and the other receiving member 2B are installed. A configuration is shown in which a trailing member 4B having an inverted trapezoidal cross section is inserted and installed between the two.
In FIG. 13, the inner surfaces 31b, 31b of the other insertion portion 31B are formed on an inclined surface gradually moving away from the inner wall surfaces 28b, 28d of the facing wall 28 from the lower end edge toward the upper end edge, and the other receiving member 2B. The variation of the coupling member 4 in the case where the inner wall surfaces 28b and 28d of the facing wall 28 are formed on the inclined surface gradually moving away from the inner surfaces 31b and 31b of the other insertion portion 31B from the lower end edge to the upper end edge is shown. ..
In FIG. 13A, a leading member 4A having an inverted trapezoidal cross section is installed on the inner wall surface 28b, 28d side of the facing wall 28 of the other receiving member 2B, and the leading member 4A and the inner surface 31b of the other insertion portion 31B, The configuration in which the trailing member 4B having an inverted trapezoidal cross section is inserted and installed between the 31b and the 31b is shown.
FIG. 13B shows a leading member 4A having a parallelogram cross section having an inclined surface parallel to the inclined surface of the inner wall surface 28b, 28d on the inner wall surface 28b, 28d side of the facing wall 28 of the other receiving member 2B. Is installed, and a trailing member 4B having an inverted trapezoidal cross section is fitted between the leading member 4A and the inner surfaces 31b and 31b of the other insertion portion 31B.
In FIG. 13C, a leading member 4A having a parallelogram cross section having an inclined surface parallel to the inclined surface of the inner surfaces 31b and 31b is installed on the inner surfaces 31b and 31b side of the other insertion portion 31B, and the preceding member 4A is installed. The configuration in which the trailing member 4B having an inverted trapezoidal cross section is fitted between the member 4A and the inner wall surfaces 28b and 28d of the facing wall 28 of the other receiving member 2B is shown.
Even if the joint 1 has the configuration shown in FIGS. 11 to 13 as described above. The same effect as when the coupling member 4 shown in the first to ninth embodiments is used can be obtained.

Embodiment 11
In the coupling member 4 composed of the leading member 4A and the trailing member 4B described above, the trailing member 4B is placed between the inclined surface 4a of the leading member 4A and the facing wall 28 or the insertion portions 31A and 31B from above. It is configured to be pushed in, but in the case of this configuration, the fitted trailing member 4B may come off upward.
Therefore, the connecting member 4 having the structure shown in FIGS. 14 to 16 was used.
That is, the leading member 4A is configured to have a screw screwing hole 52 reaching from the inclined surface 4a to the inside, and the trailing member 4B is configured to have a screw through hole 51 reaching from the upper surface to the inclined surface 4a. .. The screw through hole 51 is formed into a long hole whose length in the direction along the inclined direction of the inclined surface 4a is longer than the length in the direction along the inclined direction of the inclined surface 4a of the screw threading hole 52.
According to the spacer 5 having the above configuration, for example, as shown in FIG. 16, after the leading member 4A is installed, the trailing member 4B is installed between the inclined surface 4a of the leading member 4A and the facing wall 28. The screw 53 passes through the screw through hole 51 in a state where the inclined surface 4a of the leading member 4A and the inclined surface 4a of the trailing member 4B are in contact with each other so that the screw through hole 51 and the screw screwing hole 52 are continuous. By being fastened to the screw threading hole 52, the leading member 4A and the trailing member 4B are connected.

That is, the coupling member 4 according to the eleventh embodiment includes a screw threading hole 52 in which the leading member 4A reaches from the inclined surface 4a to the inside, and the screw through hole 51 in which the trailing member 4B reaches from the upper surface to the inclined surface 4a. The screw through hole 51 is formed in a long elongated hole along the inclination direction of the inclined surface 4a, and the inclined surface 4a of the preceding member 4A is provided so that the screw through hole 51 and the screw screwing hole 52 are continuous. And the inclined surface 4a of the trailing member 4B are in contact with each other, and the screw 53 passes through the screw through hole 51 and is fastened to the screw threading hole 52, so that the leading member 4A and the trailing member 4B are connected. It was a coupling member configured to be.

According to the coupling member 4 according to the eleventh embodiment, since the leading member 4A and the trailing member 4B are connected by the screw 53, it is possible to prevent the trailing member 4B from coming off upward.
Further, since the trailing member 4B includes a screw through hole 51 formed in a long elongated hole along the inclined direction of the inclined surface 5b, for example, the inclined surface 4a of the leading member 4A and the facing wall 28 shown in FIG. Even if the distance from the inner wall surface 28b is not constant, by tightening the screw 53 into the screw threading hole 52, the trailing member 4B moves downward along the inclined surface 4a, and the trailing member moves downward. The inclined surface 4a of the 4B and the inclined surface 4a of the leading member 4A can be brought into close contact with each other, and the surface 5a of the trailing member 4B and the inner wall surface 28b of the facing wall 28 can be brought into close contact with each other. By fastening, the trailing member 4B can be reliably fitted between the inclined surface 4a of the leading member 4A and the facing wall 28, and this fitting state can be maintained, and the receiving members 2A and 2B can be maintained. Will be able to introduce prestress.
Therefore, the coupling member 4 more effectively exerts the axial force transmission function between the receiving members 2A and 2B and the function as a reaction force device for introducing prestress into the receiving members 2A and 2B, and the receiving member 2A , 2B and the connecting member 3 can be firmly integrated.

As shown in FIGS. 14 to 16, the configuration of the coupling member 4 composed of the leading member 4A and the trailing member 4B, as described in the eleventh embodiment, is the same as that of the preceding spacer 5A and the trailing spacer. It may be applied to the spacer 5 composed of 5B.
According to the spacer 5 to which the configuration according to the eleventh embodiment is applied, since the leading spacer 5A and the trailing spacer 5B are connected by the screw 53, it is possible to prevent the trailing spacer 5B from coming off upward.
Further, the trailing spacer 5B is formed into a long hole in which the length of the inclined surface 5b in the inclined direction is longer than the length of the inclined surface 5b of the screw threading hole 52 in the direction along the inclined direction. Since the screw through hole 51 is provided, as shown in FIG. 5C, the trailing spacer 5B can be reliably fitted between the inclined surface 5b of the leading spacer 5A and the facing wall 28 as described above. Since this fitted state can be maintained, the function of securing the joint spacing, the function of axial force transmission between the receiving members 2A and 2B, and the function of a reaction force device for introducing prestress to the receiving members 2A and 2B are provided. It is more effectively exhibited, and the receiving members 2A and 2B and the connecting member 3 can be firmly integrated.

A coupling member 4 composed of one leading member 4A and two or more trailing members 4B, 4B ... May be used.

The coupling member 4 in the joint 1 of the present invention includes a leading member 4A installed between the inner wall surfaces of the facing walls 28 and 28 facing each other and the inner surfaces of the insertion portions 31A and 31B, and the installed leading member 4A. It may be composed of a trailing member 4B that is fitted between the inner wall surfaces of the facing walls 28 and 28, or between the installed leading member 4A and the inner surface of the insertion portions 31A and 31B.

Further, the method of connecting the floor slab 10 as a concrete member of the present invention includes a preceding member installation step of installing the leading member 4A of the connecting member 4 between the inner wall surface of the facing wall facing each other and the inner surface of the insertion portion. , The trailing member 4B of the coupling member 4 is fitted from above between the installed leading member 4A and the inner wall surface of the facing wall, or between the installed leading member 4A and the inner surface of the insertion portion. Any method may be used as long as it includes a step for installing a trailing member.

In each embodiment, the spacer 5 is installed between the facing walls of the receiving members facing each other of the receiving members adjacent to each other, but the spacer is installed at a position other than between the facing walls at the joint. It may be. That is, a plurality of spacers may be arranged and installed at joints along a direction perpendicular to the bridge axis (bridge width direction) Y at predetermined intervals.

Further, as the spacer 5 and the coupling member 4, spacers and coupling members other than those made of steel and casting described above may be used.

Further, the concrete member may be a concrete member other than the floor slab.

1 joint, 2A, 2B receiving member, 3 connecting member, 4 connecting member (joining means),
4 Joining member, 4A leading member, 4B trailing member, 4a inclined surface, 4b surface,
5 spacer, 5A leading spacer, 5B trailing spacer,
10 Deck (concrete member), 11 Deck end, 11s Deck end face, 15 joints, 16 joints, 21A, 21B recesses, 23 fixing parts, 31A, 31B insertion parts,
32 Connection part.

Claims (5)

It is a joint of concrete members for connecting concrete members to each other.
It is provided with a receiving member installed on the end side of each adjacent concrete member, a connecting member connecting the receiving members adjacent to each other, and a connecting member connecting the receiving members adjacent to each other and the connecting member.
The receiving member includes a recess into which the insertion portion provided in the connecting member is inserted, and a fixing portion fixed to the concrete of the concrete member.
The connecting member includes a pair of insertion portions inserted into each recess of each receiving member adjacent to each other, and a connecting portion connecting the pair of insertion portions.
The connecting member is fitted between the inner wall surface of at least one facing wall of each facing wall of each recess of each receiving member facing each other and the inner surface of the insertion portion facing the inner wall surface to meet the facing wall. A member that connects to the insertion part
The connecting member is installed between a leading member installed between the inner wall surface of the facing wall facing each other and the inner surface of the insertion portion, and between the installed leading member and the inner wall surface of the facing wall, or the mounting member. A joint of a concrete member, characterized in that it is configured to include a trailing member that is fitted between the leading member and the inner surface of the insertion portion. The leading member installed between the inner wall surface of the facing wall facing each other and the inner surface of the insertion portion faces each other at a distance from one of the inner wall surface of the facing wall and the inner surface of the insertion portion facing each other. The surface is formed as an inclined surface so that the distance from the one surface increases toward the upper side, and the trailing member is an inclined surface in contact with the inclined surface of the preceding member and a surface in contact with the one surface. The joint of a concrete member according to claim 1, wherein the joint is configured to have. The leading member has a threaded hole that reaches from the inclined surface to the inside.
The trailing member has a screw through hole that reaches from the top surface to the inclined surface.
The screw through hole is formed in a long hole in which the length in the direction along the inclined direction of the inclined surface is longer than the length in the direction along the inclined direction of the inclined surface of the screw threading hole.
The screw passed through the screw through hole and was fastened to the screw threaded hole in a state where the inclined surface of the leading member and the inclined surface of the trailing member were in contact with each other so that the screw through hole and the screw screwing hole were continuous. The joint of a concrete member according to claim 2, wherein the leading member and the trailing member are connected to each other. Each facing wall of each recess of each receiving member facing each other includes one-sided facing wall and the other-side facing wall located on both sides of a groove for inserting the connecting portion of the connecting member from above.
The coupling member is provided between the inner wall surface of the one-sided facing wall of the receiving member facing each other and the inner surface of the insertion portion, and the inner wall surface of the other facing wall of the receiving member facing each other and the inner surface of the insertion portion. The joint of a concrete member according to any one of claims 1 to 3, wherein the joint is provided between the two. It is a connection method of concrete members that connects concrete members arranged so as to be adjacent to each other through a gap where the end faces serve as joints by using a joint.
The fitting is
It is provided with a receiving member installed on the end side of each adjacent concrete member, a connecting member for connecting the receiving members adjacent to each other, and a connecting means for connecting the receiving members adjacent to each other and the connecting member.
The receiving member includes a recess into which the insertion portion provided in the connecting member is inserted, and a fixing portion fixed to the concrete of the concrete member.
The connecting member includes a pair of insertion portions that are inserted into each recess of each receiving member adjacent to each other and joined to each receiving member, and a connecting portion that connects the pair of insertion portions.
The connecting member includes a leading member and a trailing member.
How to connect concrete members
In the insertion portion installation step, one insertion portion of the connecting member is inserted into the recess of one receiving member for installation, and the other insertion portion of the connecting member is inserted into the recess of the other receiving member for installation. Installation steps and
A leading member installation step in which the leading member is installed between the inner wall surface of the facing wall facing each other and the inner surface of the insertion portion.
A trailing member installation step in which a trailing member is inserted and installed from above between the installed leading member and the inner wall surface of the facing wall, or between the installed leading member and the inner surface of the insertion portion. A method of connecting concrete members, which is characterized by having and.

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