JP7402100B2 - Concrete member joints and concrete member connection methods - Google Patents

Description

The present invention relates to a concrete member joint, etc. for connecting concrete members.

For example, concrete precast deck slabs for bridges are laid over multiple main girders installed in parallel in the direction perpendicular to the bridge axis (bridge width direction), and the adjacent deck slabs are connected along the bridge axis direction using a cotter. A floor slab connection method is known that connects using a joint called a type joint (see Patent Document 1).
The joint includes receiving members installed at the end sides of adjacent floor slabs, connecting members that connect the adjacent receiving members, and bolts that fix the connecting members to the receiving members. be. The receiving member includes an engaging receiving part with which the engaging part provided on the connecting member engages, and an anchoring part formed of a steel material such as anchoring bar, which is fixed to the concrete of the floor slab. Equipped with. The connecting member includes a pair of engaging parts that engage with the engaging receiving parts of the receiving members installed at each end of each adjacent floor slab, and a connecting part that connects the pair of engaging parts. .
According to this joint, after each engagement part of the connecting member is inserted into each engagement receiving part of each engagement receiving part buried in the end of each adjacent deck slab along the bridge axis direction, the engagement part is By inserting a bolt into the bolt insertion hole formed in the fixed part of the engaging part fitted into the joint receiving part and fastening the bolt to the screw hole formed in the bottom plate of each engaging part, the connecting member and The engagement receiving portion is fixed, and each adjacent floor slab is connected by the joint.

Patent No. 5787965

However, due to manufacturing errors in the joints, manufacturing errors in the floor slabs, variations in the amount of shrinkage (warping), variations in the amount of epoxy resin applied to the joints to prevent corrosion, and construction errors during the erection of the floor slabs, etc. Misalignment occurs in the horizontal and vertical directions between the engagement receiving portions embedded in the ends of the mating floor slabs. 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, making it impossible to connect the connecting member and the engaging receiving portion. In addition, 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 may Since these do not match, the bolt cannot be fastened, and the connecting member and the engagement receiving part cannot be connected. In this way, if the connecting member and the engagement receiver cannot be coupled, stress cannot be transmitted through the joint, which may cause damage to the joint.
The present invention provides a concrete member joint that can connect a receiving member and a connecting member even if the receiving members buried in the ends of adjacent concrete members are misaligned in the horizontal or vertical direction. etc.

The concrete member joint according to the present invention is a concrete member joint for connecting concrete members to each other, and includes a receiving member installed at the end side of each adjacent concrete member, and each receiving member adjacent to each other. and a connecting member that connects each receiving member and the connecting member that are adjacent to each other. The connecting member includes a pair of insertion portions that are inserted into each recess of each adjacent receiving member, and a connecting portion that connects the pair of insertion portions, and the connecting member faces each other. A member that is fitted between the inner wall surface of at least one of the opposing walls of each recess of each receiving member and the inner surface of the insertion section that faces the inner wall surface, thereby coupling the opposing wall and the insertion section. The connecting member is connected between a preceding member installed between the inner wall surface of the opposing wall and the inner wall surface of the insertion portion that face each other, and between the installed preceding member and the inner wall surface of the opposing wall, or , a trailing member that is fitted between the installed preceding member and the inner surface of the insertion section , and the preceding member is installed between the inner wall surface of the opposing wall and the inner surface of the insertion section that face each other. is an inclined surface such that the surface facing one of the inner wall surfaces of the opposing walls and the inner surface of the insertion portion with a distance therebetween is such that the distance from the one surface becomes larger as it goes upward. The trailing member is characterized in that it is configured to have an inclined surface that contacts the inclined surface of the preceding member and a surface that contacts the one surface.
In addition, the leading member is provided with a screw hole that reaches from the inclined surface to the inside, and the trailing member is provided with a screw through hole that reaches from the top surface to the inclined surface, and the screw through hole is arranged in a direction along the inclination direction of the inclined surface. The length of the hole is longer than the length of the slope of the screw hole in the direction along the slope, and the hole is formed with the slope of the preceding member so that the screw through hole and the screw hole are continuous. The leading member and the trailing member are connected to each other by passing the screw through the screw through hole and fastening the screw to the screw threading hole while the inclined surface of the trailing member is in contact with the inclined surface of the trailing member.
Further, each opposing wall of each recess of each receiving member facing each other includes one side opposing wall and another side opposing wall located on both sides of a groove for inserting the connecting portion of the connecting member from above, and The member is provided between the inner wall surface of one opposing wall of the receiving member facing each other and the inner surface of the insertion portion, and between the inner wall surface of the other opposing wall of the receiving member facing each other and the inner surface of the insertion portion. It is characterized by being placed in between.
According to the concrete member joint according to the present invention, even if the receiving members buried in the ends of adjacent concrete members are misaligned in the horizontal or vertical direction, the receiving member and the connecting member It becomes possible to combine with.
The method for connecting concrete members according to the present invention is a method for connecting concrete members that uses a joint to connect concrete members that are arranged adjacent to each other with gaps between their end faces serving as joints. includes a receiving member installed on the end side of each adjacent concrete member, a connecting member that connects each adjacent receiving member, and a connecting member that connects each adjacent receiving member and connecting member. The receiving member includes a recess into which the insertion portion provided on the connecting member is inserted, and an anchoring portion that is fixed to the concrete of the concrete member, and the connecting member is inserted into each recess of each adjacent receiving member. The connecting member includes a pair of insertion portions that are connected 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, and the method for connecting concrete members includes : an insertion part installation step of inserting and installing one insertion part of the connecting member into the recess of one receiving member, and inserting and installing the other insertion part of the connecting member into the recess of the other receiving member; a preceding member installation step of installing the member between the inner wall surfaces of the opposing walls of the mutually adjacent receiving members and the inner surface of the insertion portion of the connecting member ; and the inner wall surfaces of the installed preceding member and the opposing wall. or between the installed preceding member and the inner surface of the insertion portion, the following member is installed by inserting the following member from above.
According to the method for connecting concrete members according to the present invention, even if there is a shift in the horizontal or vertical direction between the receiving members buried in the ends of adjacent concrete members, the receiving members can be connected to each other. It becomes possible to easily connect components as designed.

FIG. 3 is a view from above of the connection structure of the floor slab (Embodiment 1). FIG. 2 is an exploded perspective view showing a joint (Embodiment 1). FIG. 2 is a perspective view (Embodiment 1) showing a state in which each receiving member and a connecting member of the joint are connected by a connecting member. FIG. 3 is a plan view (Embodiment 1) showing a state in which each receiving member of the joint and a connecting member are connected by a connecting member. Explanatory diagram showing the procedure of a method for connecting adjacent floor slabs (Embodiment 1). Explanatory diagram showing the procedure of a method for connecting adjacent floor slabs (Embodiment 1). Explanatory diagram showing the procedure of a method for connecting adjacent floor slabs (Embodiment 1). A sectional view showing a connection structure between adjacent floor slabs (Embodiment 2). A sectional view showing a connection structure between adjacent floor slabs (Embodiment 3). A sectional view showing a connection structure between adjacent floor slabs (Embodiment 4). A sectional view showing a part of a connection structure between adjacent floor slabs (Embodiment 10). A sectional view showing a part of a connection structure between adjacent floor slabs (Embodiment 10). A sectional view showing a part of a connection structure between adjacent floor slabs (Embodiment 10). FIG. 7 is a perspective view showing a spacer of a floor slab connection structure (Embodiment 11). FIG. 7 is an exploded perspective view showing a spacer of a floor slab connection structure (Embodiment 11). FIG. 3 is a sectional view showing a connection structure of floor slabs (Embodiment 11).

Embodiment 1
For example, as shown in Figure 1, a bridge is a concrete member that is built over multiple main girders (not shown) arranged in parallel in the direction perpendicular to the bridge axis (bridge width direction) Y, and that are adjacent to each other along the bridge axis direction X. A joint 1 according to Embodiment 1 that connects deck slabs 10, 10 made of concrete precast for use with each other is connected to an end 11 of one of the deck slabs 10, 10 adjacent to each other along the bridge axis direction 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 deck slabs 10, 10 along the bridge axis direction A connecting member 3 that connects the receiving member 2A installed at the end 11 of one floor slab 10 adjacent to each other along the X and the receiving member 2B installed at the end 11 of the other floor slab 10 adjacent to each other. It is configured to include a connecting member 4 that connects each receiving member 2A, 2B and a connecting member 3.

As shown in FIG. 1, the connection structure of the adjacent deck slabs 10, 10 along the bridge axis direction Each floor slab 10, 10, a spacer 5 installed in a gap serving as a joint 15, a joint 1 according to Embodiment 1 that connects each floor slab 10, 10 arranged adjacent to each other, and a joint 15 This structure includes a joint material 16 such as concrete or mortar filled in the gap.

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

Note that the receiving members 2A and 2B are installed on the end 11 side of the floor slab 10 so that the lower surface 2u is parallel to the lower surface 10u (see FIG. 5(a)), which is a flat plate surface of the floor slab 10, Therefore, when the floor slab 10 is installed so that the lower surface 10u is in contact with a horizontal surface, the lower surface 2u of the receiving members 2A, 2B becomes a horizontal surface.
Therefore, hereinafter, the direction perpendicular to the lower surface 10u of the deck slab 10 spanned over a plurality of main girders is defined as up and down, and the end surfaces 11s, 11s (see FIG. 1) (direction perpendicular to the bridge axis (bridge width direction) Y) is 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. It includes a connecting part 32 that connects the insertion part 31A and the insertion part 31B.
The connecting portion 32 is formed of a flat plate that connects the center portion between the left and right sides of one insertion portion 31A and the center 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 thickness slightly narrower than the groove width of a connecting portion insertion groove 60, which will be described later.
The connecting member 3 includes a lower surface 3u (see FIG. 6(a)) formed as a parallel surface (flat surface) that makes surface contact with the horizontal surface when it is installed on the horizontal surface.

As shown in FIG. 2, the connecting member 3 has an H-shaped upper surface 3t when viewed from above, and an H-shaped lower surface 3u when viewed from below, which are formed in parallel opposing planes. 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 perpendicular to 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 are formed on the bottom plate 25 having a rectangular or square shape, for example, and on one end edge side (for example, the fixing The end wall 26 is provided to rise from the edge side of the side where the portion 23 is provided, and the left and right side walls 27, 27 are provided to rise from each of the other pair of opposing edge sides of the bottom plate 25. , and an opposing wall 28 that is provided to rise from the other one of the pair of opposing edges of the bottom plate 25 (for example, the edge opposite to the side where the fixing section 23 is provided). and the insertion openings 29 of the recesses 21A and 21B into which the insertion parts 31A and 31B are inserted are located in the upper part surrounded by the upper edge of the end wall 26, the side walls 27, 27, and the opposing wall 28. This is a configuration formed by an opening.
The bottom plate 25 may have a shape in which the edges other than the edge on the side where the opposing wall 28 rises are formed into a circular edge, a polygonal edge, or the like. That is, the recesses 21A and 21B are formed by a curved wall, a polygonal wall, etc., in which the left and right side walls 27, 27 rising from the circular edge side, polygonal edge side, etc. of the bottom plate 25 and the end wall 26 are integrated, a polygonal wall, etc., and the opposing wall 28. The configuration may be such that it is surrounded by

As shown in FIGS. 2 to 4, the connecting portion 32 of the connecting member 3 is inserted into the left and right center positions of the opposing walls 28 of the receiving members 2A and 2B installed on the end 11 side of the floor slab 10. A connecting portion insertion groove 60 is formed. The connecting portion insertion groove 60 is formed to extend from the opening 29 toward the inner bottom surface 25a (see FIG. 4) of the bottom plate 25.
In addition, uneven portions 61 are formed on the outer surfaces of the left and right side walls 27, 27 in order to increase shear resistance and increase adhesion of the floor slab 10 to concrete.

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

For example, as shown in FIG. 5A, the inner bottom surfaces 25a of the bottom plates 25 of the recesses 21A and 21B are formed into planes parallel to the lower surface 2u, and the inner wall surfaces 26a of the end walls 26 and the side walls 27 , 27 are formed perpendicular to the inner bottom surface 25a.
The inner wall surface 28a of the left opposing wall 28L of the recess 21A, the inner wall surface 28c of the right opposing wall 28R of the recess 21A, the inner wall surface 28b of the left opposing wall 28L of the recess 21B, and the inner wall surface 28d of the right opposing wall 28R of the recess 21B are , are formed perpendicularly to the inner bottom surface 25a of the bottom plate 25 (see FIGS. 2, 4, and 5(a)).

As shown in FIG. 4, the receiving members 2A, 2B have the receiving parts 22A, 22B embedded in the end 11 side of the floor slab 10 with the opening 29 and the connecting part insertion groove 60 exposed to the outside, and A fixing part 23 provided to extend from 26 toward the center of the floor slab 10 is embedded in the floor slab 10.
That is, after the receiving member 2A or 2B is attached to a formwork (not shown) so that the opening 29 and the connecting part insertion groove 60 are exposed to the outside and the other parts are buried in the concrete of the floor slab 10, the mold is After pouring concrete into the frame and hardening the concrete, the receiving member 2A or 2B is removed from the formwork and demolded, so that the receiving member 2A or 2B is embedded in the end 11 side and fixed. A concrete precast deck slab 10 for a bridge is formed.

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

The spacer 5 includes a preceding spacer 5A that is installed in contact with one outer wall surface 62, 63 of the outer wall surfaces of the opposing walls 28, 28 of the receiving members 2A, 2B facing each other, and 5A, and a trailing spacer 5B that is fitted between the other outer wall surfaces 62, 63 of the outer wall surfaces of the opposing walls 28, 28 of the mutually opposing receiving members 2A, 2B.
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 a leading spacer 5A and the left facing wall of the other receiving member 2A. 28L and a trailing spacer 5B fitted between the outer wall surface 62 and the outer wall surface 62 of the spacer 28L.
The second first spacer 5 includes a preceding spacer 5A installed in contact with the outer wall surface 63 of the right opposing wall 28R of one receiving member 2A, and a preceding spacer 5A and the right opposing wall 28R of the other receiving member 2A. A trailing spacer 5B is fitted between the outer wall surface 63 of the wall 28R.
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 mutually adjacent receiving members 2A, 2B facing each other can be adjusted. It becomes possible to respond to increases and decreases in the dimensions between the two.

For example, as shown in FIGS. 2 and 5(a), the preceding spacer 5A is installed in the gap that will become the joint 15, and is attached to the opposing wall 28 of one receiving member 2A (the outer wall surface 62 of the left opposing wall 28L or A surface (vertical surface) 5a that functions as a mounting surface and is formed in a plane 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 slopes in the vertical direction. 5b, an upper surface that connects the upper edge of the surface 5a and the upper edge of the inclined surface 5b, and a lower surface that connects the lower edge of the surface 5a and the lower edge of the inclined surface 5b.
The inclined surface 5b of the preceding spacer 5A is formed into an inclined surface that gradually approaches the surface 5a from the lower edge toward the upper edge when the preceding spacer 5A is installed in the gap serving as the joint 15.

For example, as shown in FIGS. 2 and 5(c), the trailing spacer 5B is installed in the gap that becomes the joint 15, and the trailing spacer 5B is attached to the opposing wall 28 of the other receiving member 2B (the outer wall surface 62 of the left opposing wall 28L). or a surface (vertical surface) 5a formed in a plane that faces the outer wall surface 63) of the right facing wall 28R and extends vertically and horizontally; and an inclined surface 5b that faces the surface 5a and slopes in the vertical direction; It is formed in a shape including an upper surface that connects the upper edge of the surface 5a and the upper edge of the inclined surface 5b, and a lower surface that connects the lower edge of the surface 5a and the lower edge of the inclined surface 5b.
The inclined surface 5b of the trailing spacer 5B is formed into an inclined surface that gradually moves away from the surface 5a from the lower edge toward the upper edge when 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 into block bodies having a trapezoidal vertical cross section when installed in the gap serving as the joint 15. In the trapezoid, the angle between the bottom base of the trapezoid and one leg is 90°.
The preceding spacer 5A is installed in the gap that will become the joint 15 so that the lower surface including the lower base of the trapezoid is located downward (see FIG. 5(a)).
Further, the trailing spacer 5B is installed in the gap that will become the joint 15 so that the lower surface including the upper base of the trapezoid is located downward (see FIG. 5(c)).

In the coupling member 4, a receiving member 2A and a 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 one receiving member 2A, and the other of the connecting member 3 is inserted into the recess 21A of the connecting member 3. After the insertion portion 31B is inserted into the recess 21B of the other receiving member 2B, the space between the opposing wall 28 of the recess 21A of one receiving member 2A and the one insertion portion 31A, and the recess of the other receiving member 2B. 21B and the other insertion portion 31B (see FIG. 7(b)).

Specifically, as shown in FIG. 4, the coupling member 4 connects one of the receivers between the inner wall surface 28a of the left opposing wall 28L of the recess 21A of one of the receivers 2A and the inner surface 31a of one of the insertion portions 31A. Between the inner wall surface 28c of the right opposing wall 28R of the recess 21A of the member 2A and the inner surface 31a of one insertion portion 31A, and between the inner wall surface 28b of the left opposing wall 28L of the recess 21B of the other receiving member 2B and the other insertion portion 31B. and between the inner wall surface 28d of the right opposing wall 28R of the recess 21B of the other receiving member 2B and the inner surface 31b of the other insertion portion 31B.

The coupling member 4 includes a preceding member 4A installed in a state facing one of the inner wall surfaces of the facing walls facing each other and the inner surface of the insertion portion, and a leading member 4A and a leading member 4A installed in a state facing one of the inner wall surfaces of the opposing walls facing each other and the inner surface of the insertion portion. It is composed of a trailing member 4B that is fitted between the inner wall surface of the wall and the other surface of the inner surface of the insertion portion.

For example, as shown in FIG. 7(a), the preceding member 4A is located between the opposing wall 28 of one receiving member 2A and one insertion portion 31A, and between the opposing wall 28 of the other receiving member 2B and the other inserting portion 31A. 31B, and is arranged so that the lower surface is placed on the inner bottom surface 25a and a surface 4b, which will be described later, faces the opposing wall 28 in parallel.
The preceding member 4A is inserted between the opposing wall 28 of one receiving member 2A and one insertion portion 31A, or between the opposing wall 28 of the other receiving member 2B and the other insertion portion 31B, and the lower surface is placed on the inner bottom surface 25a, a surface (vertical surface) 4b formed as a plane extending vertically and horizontally, an inclined surface 4a facing the surface 4b and inclined in the vertical direction, and the surface 4b It is formed in a shape including an upper surface that connects the upper edge of the surface 4a to the upper edge of the inclined surface 4a, and a lower surface that connects the lower edge of the surface 4b and the lower edge of the inclined surface 4a.
The inclined surface 4a of the preceding member 4A is formed into an inclined surface that gradually approaches the surface 4b from the lower edge toward the upper edge in a state where the lower surface of the preceding member 4A is placed on the inner bottom surface 25a.

For example, as shown in FIG. 7(b), the trailing member 4B is arranged between the installed preceding member 4A and one insertion section 31A, or between the installed preceding member 4A and the other insertion section 31B. A surface (vertical surface) 4b formed in a plane extending vertically and horizontally facing the inner surface 31a of one insertion section 31A or the inner surface 31b of the other insertion section 31B when inserted into the 4b, an inclined surface 4a that is inclined in the vertical direction and contacts the inclined surface 4a of the preceding member 4A installed earlier; It is formed in a shape including a lower edge of the surface 4b and a lower surface that connects with the lower edge of the inclined surface 4a.
The inclined surface 4a of the trailing member 4B is arranged such that 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 into an inclined surface that gradually moves 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 into block bodies having a trapezoidal vertical cross section in the installed state. In the trapezoid, the angle between the bottom base of the trapezoid and one leg is 90°.
The preceding member 4A is installed such that the lower surface including the lower base of the trapezoid is placed on the inner bottom surface 25a.
Further, the trailing member 4B is installed such that the lower surface including the upper base of the trapezoid is located downward.

In Embodiment 1, specifically, as shown in FIGS. 4, 7(a), and 7(b), each of the mutually adjacent receiving members 2A, 2B and the connecting member 3 form four connecting members. 4, 4, . . .
That is, the first coupling member 4 is arranged such that the lower surface thereof is placed on the inner bottom surface 25a, and the surface 4b faces in parallel with the inner wall surface 28a of the left opposing wall 28L of the recess 21A of the one receiving member 2A. It is composed of a leading member 4A installed in the front member 4A, and a trailing member 4B fitted between the installed leading member 4A and the inner surface 31a of one insertion portion 31A.
The second coupling member 4 is installed so that its lower surface is placed on the inner bottom surface 25a and its surface 4b faces parallel to the inner wall surface 28c of the right facing wall 28R of the recess 21A of the one receiving member 2A. It is composed of a leading member 4A that has been installed, and a trailing member 4B that is fitted between the installed leading member 4A and the inner surface 31a of one insertion portion 31A.
The third coupling member 4 is installed so that its lower surface is placed on the inner bottom surface 25a and its surface 4b faces parallel to the inner wall surface 28b of the left facing wall 28L of the recess 21B of the other receiving member 2B. The leading member 4A is installed, and the trailing member 4B 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 its lower surface is placed on the inner bottom surface 25a and its surface 4b faces parallel to the inner wall surface 28d of the right facing wall 28R of the recess 21B of the other receiving member 2B. The leading member 4A is installed, and the trailing member 4B is fitted between the installed leading member 4A and the inner surface 31b of the other insertion portion 31B.

Next, a method for connecting the floor slabs 10, 10 will be explained in detail.
First, as shown in FIG. 5(a), for example, one of the deck slabs 10, 10 installed adjacently along the bridge axis direction Preliminary spacer 5A is installed.
The preceding spacer 5A may be installed, for example, on the outer wall surface 62 of the left opposing wall 28L and the outer wall surface 63 of the right opposing wall 28R of the receiving member 2A, or the preceding spacer facing the outer wall surfaces 62, 63, as shown in FIG. After applying an adhesive to at least one of the surfaces 5a of the spacer 5A, the surface 5a of the preceding spacer 5A and the outer wall surface 62 and the outer wall surface 63 of the opposing wall 28 are bonded to each other. A preceding spacer 5A is attached to each.
That is, the leading spacer 5A installed with its surface 5a in contact with the outer wall surface 62 of the left opposing wall 28L of one receiving member 2A has a surface facing the outer wall surface 62 of the left opposing wall 28L of the other receiving member 2B. is formed into an inclined surface 5b such that the distance from the outer wall surface 62 of the left opposing wall 28L of the other receiving member 2B increases as it goes upward (see FIG. 5(a)).
Similarly, the preceding spacer 5A installed with its surface 5a in contact with the outer wall surface 63 of the right opposing wall 28R of one receiving member 2A faces the outer wall surface 63 of the right opposing wall 28R of the other receiving member 2B. The surface is formed into an inclined surface 5b such that the distance from the outer wall surface 63 of the right opposing wall 28R of the other receiving member 2B increases as it goes upward (see FIG. 5(a)).

Then, as shown in FIG. 5(a), one floor slab 10 with the preceding spacer 5A attached is installed on the girder, and the opposing wall 28 of the receiving member 2B of the other floor slab 10 and one floor slab The other floor slab 10 is installed on the girder so that the opposing wall 28 of the 10 receiving members 2A faces each other across the joint width.
Next, as shown in FIGS. 5(b), 5(c), and 4, the outer wall surface 62 of the left opposing wall 28L of the receiving member 2B of the other floor slab 10 and the inclined surface 5b of the preceding spacer 5A and the installation space formed between the outer wall surface 63 of the right opposing wall 28R of the receiving member 2B of the other floor slab 10 and the inclined surface 5b of the preceding spacer 5A, respectively. Insert and install the row spacer 5B.
That is, the surface 5a of one trailing spacer 5B is brought into contact with the outer wall surface 62 of the left opposing wall 28L of the receiving member 2B of the other floor slab 10, and the inclined surface 5b of the trailing spacer 5B and the leading spacer 5A are brought into contact with each other. The one trailing spacer 5B is pushed downward while making contact with the inclined surface 5b, and the one trailing spacer 5B is fitted into the installation space.
Similarly, the surface 5a of another trailing spacer 5B is brought into contact with the outer wall surface 63 of the right facing wall 28R of the receiving member 2B of the other floor slab 10, and the inclined surface 5b of the trailing spacer 5B and the leading spacer While making contact with the inclined surface 5b of 5A, push the trailing spacer 5B downward to fit the trailing spacer 5B into the installation space.
That is, the trailing spacers 5B, 5B contact the slopes 5b, 5b of the preceding spacers 5A, 5A, and the outer wall surface 62 of the left facing wall 28L and the right facing wall 28R of the other receiving member 2B. It is configured to have surfaces 5a, 5a in contact with the outer wall surface 63 (see FIGS. 5(c) and 4).
As a result, the spacers 5 are installed between the outer wall surfaces 62, 62 of the left opposing walls 28L, 28L that face each other, and between the outer wall surfaces 63, 63 of the right opposing walls 28R, 28R that face each other (Fig. 5(c), see Figure 4).
By using such a spacer 5, even if the width dimension of the joint 15 varies, it can be accommodated.

Next, as shown in FIG. 6, one insertion part 31A of the connecting member 3 is inserted into the recess 21A of one receiving member 2A, and the other insertion part 31B of the connecting member 3 is inserted into the recess of the other receiving member 2B. 21B, and place the lower surface 3u of one insertion portion 31A on the inner bottom surface 25a of the recess 21A of one receiving member 2A, and place the lower surface 3u of the other insertion portion 31B on the recess 21B of the other receiving member 2B. It is placed on the inner bottom surface 25a of.
In this case, as shown in FIG. 6(a) and FIG. The coupling member 4 is made to face each other in parallel with a predetermined interval for installation, and connect the inner surface 31b of the other insertion portion 31B and the inner wall surfaces 28b and 28d of the opposing wall 28 of the recess 21B of the other receiving member 2B. are placed parallel to each other and facing each other at a predetermined distance.

As shown in FIGS. 7(a) and 4, the surfaces 4b, 4b, . . . of the preceding members 4A, 4A, . The preceding members 4A, 4A, . . . are installed at four predetermined positions so that they face each other and their lower surfaces are placed on the inner bottom surface 25a.
Next, as shown in FIG. 7(a) and FIG. The connecting member fitting spaces 4u, 4u formed between the inner surfaces 31a, 31a of the portion 31A, and the preceding members 4A, 4A installed so that the surfaces 4b, 4b face the inner wall surfaces 28b, 28d... The trailing members 4B, 4B, 4B, 4B are respectively fitted into the coupling member fitting spaces 4u, 4u formed between the surfaces 4a, 4a and the inner surfaces 31b, 31b of the other insertion portion 31B.
That is, the preceding member 4A installed between the inner wall surfaces of the opposing walls facing each other and the inner surface of the insertion portion is connected to one surface of the inner wall surfaces of the opposing walls facing each other and the inner surface of the insertion portion (FIG. 7). The surface facing the inner surface 31a, 31a, 31b, 31b) of a) at a distance is formed into an inclined surface 4a such that the distance from the one surface becomes larger as it goes upward, and the trailing member 4B is , as shown in FIG. 7(b), is configured to have an inclined surface 4a that contacts the inclined surface 4a of the preceding member 4A, and a surface 4b that contacts the one surface.
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 surfaces 4a of each trailing member 4B and the inclined surfaces 4a of each leading member 4A are in strong contact with each other. The surface 4b of the trailing member 4B and each inner wall surface 28a, 28c, 28b, 28d of each opposing wall 28 are in a state of solid contact.
Therefore, by the coupling member 4 composed of the leading member 4A and the trailing member 4B, one insertion portion 31A and one receiving member 2A are tightly coupled to each other in a fixed state, and the other insertion portion 31B and the other receiving member 2B are fixedly connected, and the adjacent floor slabs 10, 10 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 respectively to the pair of inner surfaces 31a, 31a, 31b, 31b that are adjacent to each other on the left and right with the connecting portion 32 in between. In the connection between each of the receiving members 2A, 2B and the connecting member 3, a fixed state with good left and right balance can be maintained (see FIG. 4).

Furthermore, after the deck slabs 10, 10 adjacent to each other along the bridge axis direction X are connected with the joint 1, as shown in FIG. 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. By filling the joint material 16 into the joint 15 which is the gap between the floor slabs 10, 10, the joining of the adjacent floor slabs 10, 10 is completed.

That is, in the method for connecting floor slabs according to the first embodiment, in the gap portion that becomes the joint 15 between the end surfaces 11s, 11s of the respective floor slabs 10, 10 arranged adjacent to each other, each of the adjacent receiving members 2A , 2B, between the outer wall surfaces 62, 62 of the mutually opposing left opposing walls 28L, 28L, and between the outer wall surfaces 63, 63 of the mutually opposing right opposing walls 28R, 28R, respectively; One insertion part 31A of the connecting member 3 is inserted and installed into the recess 21A of one receiving member 2A, and the other insertion part 31B of the connecting member 3 is inserted and installed into the recess 21B of the other receiving member 2B. In the insertion part installation step, the preceding member 4A constituting the coupling member 4 is connected to the inner wall surfaces 28a, 28c, 28b, 28d of the opposing walls 28 facing each other and the inner surfaces 31a, 31a, 31b, 31b of the insertion parts 31A, 31B. In the preceding member installation step, the following member 4B constituting the coupling member 4 is installed from above between the installed preceding member 4A and the inner surfaces 31a, 31a, 31b, 31b of the insertion portions 31A, 31B. This is a connection method that includes a step of installing a trailing member by inserting and installing it.
According to the floor slab connection method according to Embodiment 1, there is no possibility that the receiving members 2A, 2B buried in the ends of the adjacent floor slabs 10, 10 may be misaligned in the left-right direction or the vertical direction. However, the receiving members 2A, 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 parts 31A, 31B of the connecting member 3 are inserted into the recesses 21A, 21B of the receiving members 2A, 2B, and the connecting member 4 is fitted into the connecting member fitting space 4u, the connecting member 3 has a horizontal direction. A tensile force is created. Therefore, a force acts in a direction that draws the floor slabs 10, 10 toward each other through the contact portions between the receiving members 2A, 2B, the connecting member 3, and the coupling member 4. At this time, if the pulling 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, 10 try to approach each other excessively, so the receiving member 2A, 2B and the connecting member 3 may not be firmly integrated.
However, in the first embodiment, the spacer 5 installed between the opposing walls 28, 28 of the receiving members 2A, 2B facing each other across the joint portion functions as a reaction force device, thereby causing the floor slabs 10, 10 to The pulling force acting in the drawing direction can be suppressed, and the floor slabs 10, 10 are prevented from coming too close to each other.
Furthermore, an opposite force (reaction force) corresponding to the force acting in the direction of drawing the floor slabs 10, 10 toward each other is applied from the spacer 5 to the outer surfaces (outer wall surfaces 62, 62) of the opposing walls 28, 28 of the receiving members 2A, 2B. , and the outer wall surfaces 63, 63), it is possible to firmly integrate the receiving members 2A, 2B and the connecting member 3.

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 the joints 15, that is, between the opposing walls 28 and 28 of the mutually adjacent receiving members 2A and 2B. In this case, the stress and strain on the upper and lower edge sides of the joint 1 and the joint 15 filled with the joint filler 16 are reduced.

Furthermore, since the stress level of the joint 1 is reduced, the cross-sectional dimension of the joint 1 can be reduced, so the manufacturing cost of the joint 1 can be reduced, and an inexpensive joint 1 can be used. Moreover, since the stress generated in the joint 1 can be reduced, the fatigue resistance of the joint 1 can be improved.

Furthermore, 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 floor slab 10, 10, so that cracking of the floor slab 10 can be suppressed.
Moreover, 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, cracks in the floor slab 10 and joint areas can be suppressed, so salt damage and freezing such as reinforcing steel corrosion and peeling of concrete due to rainwater and chlorides entering through the cracks can be prevented, and the floor slab 10 and joint areas can be suppressed. The durability of the material is improved.
That is, according to the connection structure of Embodiment 1, the floor slabs 10, 10 can be firmly integrated using the joint 1, and the stress applied to the floor slab 10, the joint 1, and the joint part can be reduced, and the floor slab 10 and the occurrence of cracks at the joints can be suppressed.

According to the first embodiment, the spacer 5 includes a preceding spacer 5A installed in contact with one of the receiving members 2A and 2B facing each other, and a preceding spacer 5A and the other receiving member. Since the spacer 5 is composed of a trailing spacer 5B which functions as a connecting member inserted between It becomes possible to deal with increases and decreases in the dimensions between the walls 28, 28.
In other words, even if the width of the joints 15 is not constant due to the manufacturing accuracy of the floor slab 10 or the installation error of the floor slab 10, the use of the spacer 5 provides the function of ensuring the joint spacing, and the receiving member. The function as a reaction force device for transmitting the axial force between 2A and 2B and introducing prestress to the receiving members 2A and 2B is effectively exhibited, and the receiving members 2A and 2B and the connecting member 3 are firmly integrated. Moreover, the spacer 5 is provided between the outer wall surfaces 62, 62 of the left facing walls 28L, 28L of the receiving members 2A, 2B facing each other, and Since the spacer 5 is provided between the outer wall surfaces 63, 63 of the right side facing walls 28R, 28R, it has the function of securing joint spacing, transmitting axial force between the receiving members 2A, 2B, and transmitting the axial force to the receiving members 2A, 2B. The function as a reaction force device for introducing prestress is effectively exhibited, and the receiving members 2A, 2B and the connecting member 3 can be firmly integrated.
Also, between the outer wall surfaces 62, 62 of the left opposing walls 28L, 28L of the mutually opposing receiving members 2A, 2B, and the outer wall surfaces 63 of the right opposing walls 28R, 28R of the mutually opposing receiving members 2A, 2B. , 63, the vicinity of the boundary 66 (see FIG. 4) between the left opposing wall 28L of the receiving members 2A, 2B and the side wall 27, and the right opposing wall of the receiving members 2A, 2B. The stress in the vicinity of the boundary 66 between the wall 28R and the side wall 27 is reduced, and fatigue fracture in the vicinity of the boundary 66 can be suppressed.

Furthermore, according to the joint 1 according to the first embodiment, by using the connecting member 4 composed of the leading member 4A and the trailing member 4B, each deck slab 10, 10 adjacent to each other along the bridge axis direction Even if the respective receiving members 2A, 2B buried in the ends 11, 11 of the connecting member 3 and the receiving members 2A, 2B are misaligned in the horizontal direction or the vertical direction, the connecting member 3 and the receiving members 2A, 2B can be connected. .

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

Further, according to the joint 1 according to the first embodiment, the inner wall surfaces 28a, 28c, 28b, and 28d of the opposing walls 28 of the one receiving member 2A and the other receiving member 2B are formed into vertical surfaces perpendicular to the inner bottom surface 25a. Therefore, one receiving member 2A and the other receiving member 2B can have the same shape, and member costs can be reduced. Moreover, since the shapes of the receiving members 2A and 2B can be simplified, the manufacturing of the receiving members 2A and 2B becomes easy, and manufacturing costs can also be reduced.

Embodiment 2
As shown in FIG. 8, in the joint 1, the preceding member 4A constituting the coupling member 4 has inner wall surfaces 28a, 28c, 28b, 28d of the opposing walls 28 facing each other and inner surfaces 31a, 31a, 31b, 31b of the insertion portion. A trailing member 4B constituting the coupling member 4 is inserted from above between the installed leading member 4A and the inner wall surfaces 28a, 28c, 28b, 28d of the opposing wall 28, The structure may be such that the inclined surface 4a of the trailing member 4B and the inclined surface 4a of the preceding 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, 31a of one insertion portion 31A of the connecting member 3 into contact with the left and right inner wall surfaces 28a, 28c of the opposing wall 28 of one receiving member 2A, and , the preceding member 4A constituting the coupling member 4 is installed between the left and right inner wall surfaces 28b, 28d of the other opposing wall 28 facing each other and the left and right inner walls 31b, 31b of the other insertion portion 31B, The trailing member 4B constituting the coupling member 4 is inserted from above between the leading member 4A and the left and right inner surfaces 31b, 31b of the other insertion portion 31B, so that the slope 4a of the trailing member 4B and the leading The structure may be such that the member 4A is placed in contact with the inclined surface 4a.

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

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

Embodiment 6
In Embodiments 1 to 5, the leading spacer 5A installed between the receiving member 2A and the receiving member 2B facing each other has a vertical center position that is the vertical center position of the receiving members 2A and 2B, or The preceding member 4A is configured to be located near the central position and is in contact with one of the inner wall surfaces of the opposing walls and the inner surface of the insertion portion that face each other. The structure is such 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 positions.
For example, as shown in FIGS. 5 to 10, a horizontal line passing through the center position between the upper and lower sides of the opposing walls 28, 28 of the receiving members 2A, 2B (i.e., the intermediate position between the upper end and the lower end of the opposing walls 28); The spacer 5 and the coupling member 4 are installed so that the horizontal line passing through the center position between the top and bottom of the preceding spacer 5A and the horizontal line passing through the center position between the top and bottom of the preceding member 4A are the same horizontal line 65. The configuration was as follows.
As in Embodiment 6, the preceding spacer 5A and the preceding member 4A are installed such that the vertical center position is located at the vertical center position of the receiving members 2A, 2B or near the center position. Then, due to the synergistic effect of the spacer 5 and the connecting member 4, it functions as a reaction force device for securing joint spacing, transmitting axial force between the receiving members 2A and 2B, and introducing prestress to the receiving members 2A and 2B. This function is more effectively exhibited, and firm integration of the receiving members 2A, 2B and the connecting member 3 becomes possible.

Embodiment 7
As the spacer 5 and the coupling member 4, the spacer 5 and the coupling member 4 made of cast metal were used. For example, the spacer 5 and the coupling member 4 made of spheroidal graphite cast iron were used.
According to the seventh embodiment, since the spacer 5 and the coupling member 4 made of cast metal are used, the spacer 5 and the coupling member 4 have excellent weather resistance and corrosion resistance. This makes it possible to maintain an excellent bonding structure.

Embodiment 8
In the spacer 5, at least one of the sloped surfaces 5b of the leading spacer 5A and the sloped surface 5b of the trailing spacer 5B that are in contact with each other is formed into a roughened surface, so that the leading spacer 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 displacement between the inclined surfaces 5b, 5b. The function as a reaction force device for transmitting axial force and introducing prestress to the receiving members 2A, 2B is more effectively exhibited, and the receiving members 2A, 2B and the connecting member 3 are firmly integrated. It becomes possible to

Embodiment 9
In the connecting member 4, at least one of the inclined surfaces 4a of the leading member 4A and the inclined surface 4a of the trailing member 4B that contact each other is configured to have a roughened surface. By increasing the frictional force between the sloped surface 4a of the member 4A and the sloped surface 4a of the trailing member 4B, it is possible to prevent the sloped surfaces 4a and 4a from shifting, thereby ensuring the joint spacing, and the receiving members 2A and 2B. The function as a reaction force device for transmitting the axial force between them and introducing prestress to the receiving members 2A, 2B is more effectively exhibited, and the connection between the receiving members 2A, 2B and the connecting member 3 is strengthened. Integration becomes possible.

Embodiment 10
As a variation of the structure of the inner wall surface of the opposing wall 28 of the coupling member 4 and the receiving members 2A, 2B and the inner surface of the insertion portions 31A, 31B of the connecting member 3, there are, for example, the structure shown in FIGS. 11 to 13.
FIG. 11 shows that the inner wall surfaces 28b and 28d of the opposing wall 28 of the other receiving member 2B are formed as vertical surfaces, and that the inner wall surface 31b of the other insertion portion 31B gradually extends from the opposing wall 28 from the lower end edge to the upper end edge. A variation of the coupling member 4 is shown in which the coupling member 4 is formed on an inclined surface that moves away from the inner wall surfaces 28b and 28d.
In FIG. 11(a), a flat plate-shaped (rectangular cross-section) preceding member 4A having a plate surface parallel to the inner wall surfaces 28b, 28d is installed on the inner wall surfaces 28b, 28d side, and the preceding member 4A and the other A configuration is shown in which the trailing member 4B is fitted and installed between the inner surfaces 31b, 31b of the insertion portion 31B.
In FIG. 11(b), a preceding member 4A having a trapezoidal cross section is installed on the inner wall surfaces 28b and 28d, and an inverted trapezoidal cross section is placed between the preceding member 4A and the inner surfaces 31b and 31b of the other insertion portion 31B. A configuration in which the trailing member 4B is fitted and installed is shown.
In FIG. 11(c), a preceding member 4A having a parallelogram-shaped cross section and having an inclined surface parallel to the inclined surfaces of the inner surfaces 31b and 31b is installed on the inner surfaces 31b and 31b of the other insertion portion 31B. A configuration is shown in which a trailing member 4B having an inverted trapezoidal cross section is fitted and installed between the member 4A and the inner wall surfaces 28b and 28d of the opposing wall 28 of the other receiving member 2B.
FIG. 12 shows that the inner surfaces 31b, 31b of the other insertion portion 31B are formed into vertical surfaces, and the inner wall surfaces 28b, 28d of the opposing wall 28 of the other receiving member 2B gradually extend from the lower edge toward the upper edge. A variation of the coupling member 4 is shown in which the coupling member 4 is formed on an inclined surface that moves away from the inner surfaces 31b, 31b of the insertion portion 31B.
FIG. 12(a) shows a flat plate-shaped (rectangular cross-section) preceding member 4A having a plate surface parallel to the inner surfaces 31b, 31b of the other insertion portion 31B. A configuration is shown in which a trailing member 4B having an inverted trapezoidal cross section is fitted and installed between the leading member 4A and the inner wall surfaces 28b and 28d of the opposing wall 28 of the other receiving member 2B.
FIG. 12(b) shows a preceding member 4A having a parallelogram-shaped cross section and having inclined surfaces parallel to the inclined surfaces of the inner wall surfaces 28b and 28d on the inner wall surfaces 28b and 28d of the opposing wall 28 of the other receiving member 2B. is installed, and a trailing member 4B having an inverted trapezoidal cross section is fitted and installed between the leading member 4A and the inner surfaces 31b, 31b of the other insertion portion 31B.
In FIG. 12(c), a leading member 4A having a trapezoidal cross section is installed on the inner surface 31b, 31b side of the other insertion portion 31B, and inner wall surfaces 28b, 28d of the opposing wall 28 between the leading member 4A and the other receiving member 2B. A configuration is shown in which a trailing member 4B having an inverted trapezoidal cross section is fitted and installed between.
FIG. 13 shows that the inner surfaces 31b, 31b of the other insertion portion 31B are formed as inclined surfaces that gradually move away from the inner wall surfaces 28b, 28d of the opposing wall 28 from the lower end edge toward the upper end edge, and A variation of the coupling member 4 is shown in which the inner wall surfaces 28b and 28d of the opposing wall 28 are formed as inclined surfaces that gradually move away from the inner surfaces 31b and 31b of the other insertion portion 31B from the lower end edge toward the upper end edge. .
In FIG. 13(a), a preceding member 4A having an inverted trapezoidal cross section is installed on the inner wall surfaces 28b and 28d of the opposing wall 28 of the other receiving member 2B, and the preceding member 4A and the inner surface 31b of the other insertion portion 31B, 31b, a configuration in which a trailing member 4B having an inverted trapezoidal cross section is fitted and installed is shown.
FIG. 13(b) shows a preceding member 4A having a parallelogram-shaped cross section and having an inclined surface parallel to the inclined surfaces of the inner wall surfaces 28b and 28d on the inner wall surfaces 28b and 28d of the opposing wall 28 of the other receiving member 2B. is installed, and a trailing member 4B having an inverted trapezoidal cross section is fitted and installed between the leading member 4A and the inner surfaces 31b, 31b of the other insertion portion 31B.
In FIG. 13(c), a preceding member 4A having a parallelogram-shaped cross section and having an inclined surface parallel to the inclined surfaces of the inner surfaces 31b and 31b is installed on the inner surfaces 31b and 31b of the other insertion portion 31B. A configuration is shown in which a trailing member 4B having an inverted trapezoidal cross section is fitted and installed between the member 4A and the inner wall surfaces 28b and 28d of the opposing wall 28 of the other receiving member 2B.
Even if the joint 1 has the configuration shown in FIGS. 11 to 13 as described above. The same effects as in the case of using the coupling member 4 shown in Embodiments 1 to 9 can be obtained.

Embodiment 11
In the coupling member 4 made up of the preceding member 4A and the following member 4B, the following member 4B is inserted from above between the inclined surface 4a of the preceding member 4A and the opposing wall 28 or the insertion portions 31A, 31B. Although the configuration is such that the trailing member 4B is inserted by being pushed in, there is a possibility that the trailing member 4B that has been inserted may come off upward.
Therefore, the coupling member 4 was constructed as shown in FIGS. 14 to 16.
That is, the leading member 4A is configured to include a screw hole 52 that reaches from the inclined surface 4a to the inside, and the trailing member 4B is configured to include a screw through hole 51 that reaches 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 slope direction of the slope surface 4a is longer than the length in the direction along the slope direction of the slope 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 preceding member 4A is installed, the trailing member 4B is installed between the inclined surface 4a of the preceding member 4A and the opposing wall 28, The screw 53 passes through the screw through hole 51 with the slope 4a of the leading member 4A and the slope 4a of the trailing member 4B in contact so that the screw through hole 51 and the screw threading hole 52 are continuous. By being fastened to the screw hole 52, the leading member 4A and the trailing member 4B are connected.

That is, in the coupling member 4 according to Embodiment 11, the leading member 4A has a screw threading hole 52 that reaches from the inclined surface 4a to the inside, and the trailing member 4B has a threaded through hole 51 that reaches from the upper surface to the inclined surface 4a. The screw through hole 51 is formed as a long hole along the slope direction of the inclined surface 4a, and the screw through hole 51 is formed as a long hole along the inclined direction of the inclined surface 4a. With the inclined surface 4a of the trailing member 4B in contact with each other, the screw 53 passes through the screw through hole 51 and is fastened to the screw threading hole 52, thereby connecting the leading member 4A and the trailing member 4B. The coupling member is configured to

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 is provided with the screw through hole 51 formed in a long elongated hole along the direction of the slope of the slope 5b, for example, the slope 4a of the leading member 4A shown in FIG. Even when the distance between the inner wall surface 28b and 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 4B moves downward along the inclined surface 4a. The inclined surface 4a of the leading member 4B and the inclined surface 4a of the preceding member 4A are brought into close contact, and the surface 5a of the trailing member 4B is brought into close contact with the inner wall surface 28b of the opposing wall 28. After that, the screw 53 is completely tightened. By fastening, the trailing member 4B can be reliably fitted between the inclined surface 4a of the leading member 4A and the opposing wall 28, and this fitted state can be maintained, so that the receiving members 2A, 2B It becomes possible to introduce prestress.
Therefore, the coupling member 4 more effectively exhibits the function of transmitting the axial force between the receiving members 2A and 2B and the function as a reaction force device for introducing prestress to the receiving members 2A and 2B. , 2B and the connecting member 3 can be firmly integrated.

In addition, as shown in FIGS. 14 to 16, the structure of the coupling member 4 composed of the leading member 4A and the trailing member 4B as described in the eleventh embodiment is replaced by the leading spacer 5A and the trailing spacer described above. 5B may be applied to the spacer 5.
According to the spacer 5 to which the configuration according to the eleventh embodiment is applied, the leading spacer 5A and the trailing spacer 5B are connected by the screw 53, so that it is possible to prevent the trailing spacer 5B from coming off upward.
Further, the trailing spacer 5B is formed into a long hole whose length in the direction along the slope direction of the slope surface 5b is longer than the length in the direction along the slope direction of the slope surface 5b of the screw threading hole 52. Since the screw through hole 51 is provided, the trailing spacer 5B can be reliably fitted between the inclined surface 5b of the leading spacer 5A and the opposing wall 28, as shown in FIG. Since this fitted state can be maintained, the function of securing the joint spacing, the function as a reaction force device for transmitting axial force between the receiving members 2A and 2B, and introducing prestress to the receiving members 2A and 2B are performed. This is more effectively achieved, and firm integration of the receiving members 2A, 2B and the connecting member 3 becomes possible.

Note that a connecting 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 preceding member 4A installed between the inner wall surfaces of the opposing walls 28, 28 facing each other and the inner surfaces of the insertion portions 31A, 31B; The trailing member 4B may be fitted between the inner wall surfaces of the opposing walls 28, 28, or between the installed leading member 4A and the inner surfaces of the insertion portions 31A, 31B.

Further, the method for connecting the floor slab 10 as a concrete member of the present invention includes a preceding member installation step of installing the preceding member 4A of the joining member 4 between the inner wall surface of the opposing wall and the inner surface of the insertion portion. , insert the trailing member 4B of the coupling member 4 from above between the installed leading member 4A and the inner wall surface of the opposing 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 of installing a trailing member.

In each of the embodiments, the spacer 5 is installed between the opposing walls of the adjacent receiving members facing each other, but it is possible to install the spacer 5 at a position other than between the opposing walls at the joint. You can also do this. That is, a plurality of spacers may be arranged and installed at predetermined intervals along the direction perpendicular to the bridge axis (bridge width direction) Y at the joint.

Further, the spacer 5 and the coupling member 4 may be made of a material other than the above-mentioned steel or cast metal.

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,
4A leading member, 4B trailing member, 4a inclined surface, 4b surface,
5 spacer, 5A leading spacer, 5B trailing spacer,
10 floor slab (concrete member), 11 end of floor slab, 11s end face of floor slab,
15 joint, 16 joint material, 21A, 21B recess, 23 fixing part,
31A, 31B insertion part,
32 Connecting part.

Claims (4)

A concrete member joint for connecting concrete members,
comprising a receiving member installed on the end side of each adjacent concrete member, a connecting member connecting each adjacent receiving member to each other, and a connecting member connecting each adjacent receiving member and the connecting member,
The receiving member includes a recess into which the insertion portion provided on the connecting member is inserted, and an anchoring portion that is fixed to the concrete of the concrete member,
The connecting member includes a pair of insertion parts that are inserted into each recess of each adjacent receiving member, and a connecting part that connects the pair of insertion parts,
The coupling member is fitted between an inner wall surface of at least one of the opposing walls of each recess of each receiving member that faces each other and an inner surface of the insertion portion that faces the inner wall surface, and is connected to the opposing wall. A member that connects the insertion portion to the insertion portion,
The connecting member includes a preceding member installed between the inner wall surface of the opposing wall and the inner wall surface of the insertion portion that face each other, and a connecting member installed between the installed preceding member and the inner wall surface of the opposing wall, or between the installed preceding member and the inner wall surface of the opposing wall. a trailing member fitted between the leading member and the inner surface of the insertion portion ;
The preceding member installed between the inner wall surfaces of the opposing walls that face each other and the inner surface of the insertion portion faces one of the inner wall surfaces of the opposing walls that oppose each other and the inner surface of the insertion portion with a gap therebetween. The surface is formed into an inclined surface such that the distance from the one surface increases as it goes upward, and the trailing member has an inclined surface that contacts the inclined surface of the preceding member and a surface that contacts the one surface. A joint for a concrete member, characterized in that it is configured to have . The leading member has a screw 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 into an elongated hole whose length in the direction along the slope direction of the slope surface is longer than the length in the direction along the slope direction of the slope surface of the screw threading hole,
The screw passes through the screw through hole and is fastened to the screw screw hole in a state where the slope of the leading member and the slope of the trailing member are in contact so that the screw through hole and the screw screw hole are continuous. 2. The concrete member joint according to claim 1 , wherein the leading member and the trailing member are connected by this. Each opposing wall of each recess of each receiving member facing each other includes one side opposing wall and another side opposing 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 one opposing wall of the receiving member facing each other and the inner surface of the insertion portion, and between the inner wall surface of the other opposing wall of the receiving member facing each other and the inner surface of the insertion portion. The joint for concrete members according to claim 1 or 2, characterized in that the joint is provided between. A method for connecting concrete members that uses a joint to connect concrete members that are arranged adjacent to each other through gaps whose end faces serve as joints, the method comprising:
The fitting is
comprising receiving members respectively installed on the end side of each adjacent concrete member, a connecting member connecting each adjacent receiving member to each other, and a connecting member connecting each adjacent receiving member and the connecting member ,
The receiving member includes a recess into which the insertion portion provided on the connecting member is inserted, and an anchoring portion that is fixed to the concrete of the concrete member,
The connecting member includes a pair of insertion parts that are inserted into each recess of each adjacent receiving member and joined to each receiving member, and a connecting part that connects the pair of insertion parts,
The coupling member includes a leading member and a trailing member,
How to connect concrete parts:
an insertion part installation step of inserting and installing one insertion part of the connecting member into the recess of one receiving member, and inserting and installing the other insertion part of the connecting member into the recess of the other receiving member;
a preceding member installation step of installing the preceding member between the inner wall surfaces of the opposing walls of the mutually adjacent receiving members and the inner surface of the insertion portion of the connecting member ;
a trailing member installation step of inserting and installing the trailing member from above between the installed leading member and the inner wall surface of the opposing wall, or between the installed leading member and the inner surface of the insertion portion; A method for connecting concrete members, characterized by comprising:

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