JP6537369B2 - Precast bridge members - Google Patents

Description

  The present invention relates to precast bridge members with precast wall columns.

  In the case of a bridge, wall columns are usually provided at both ends in the bridge width direction (the direction perpendicular to the bridge axis) of the floor slab. The wall column is generally constructed by cast-in-place construction after floor plate construction. On the other hand, for the purpose of shortening construction period etc., the wall column will be made in advance with precast concrete, and after floor construction, the precast wall column will be arranged on the floor and concrete will be cast at the connecting part with the floor The attachment structure or attachment method (for example, patent documents 1, 2) of the wall column which is joined to a floor slab is known. In addition, there is also known an attachment structure (for example, Patent Document 3) in which a wall height column and a ground covering block are precast, and the ground covering block disposed on the floor slab and the wall height column are connected using a PC steel wire for connection. ing. Furthermore, a mounting method using a buried mold (partial precast member) that functions as a mold and forms a wall column integrally with the cast concrete after casting concrete (for example, Patent Document 4, 5) etc. (see, for example, Patent Document 1).

Patent No. 2859158 JP, 2013-36205, A JP, 2002-146721, A Patent No. 3197235 JP, 2013-57215, A

  However, all of the above-mentioned conventional techniques require that the precast box members be carried onto the floor plate after the floor plate construction, and the box members be connected to the floor plate by the respective coupling methods, and the transport and carrying-in operation is complicated. In addition, when joining the column members to the floor slab, it is difficult to position, and it is necessary to work outside the column or below the floor plate, that is, work scaffolding is required, etc. The joining operation of the members is also complicated.

  In view of such background, the present invention has an object to provide a precast bridge member which is easy to carry and carry in and to be easily joined to a floor plate of a precast wall column.

  In order to solve such a subject, the present invention is a precast bridge member (10), and the precast floor slab member (11) and the precast joined to the end of the bridge width direction of the said precast floor slab member A folding position extending along the precast deck member above the precast deck member, and a vertical position along the vertical direction; The precast floor slab member is hinged to the precast floor slab member so as to be in a deployed position opposite to the side end of the precast floor slab member.

  According to this configuration, since the precast wall column member is hinged to the precast floor plate member, it is possible to transport and carry in (bridge) the precast floor plate member and the precast wall column member together. is there. In addition, since the precast wall column members can be folded, it is possible to stack a plurality of precast bridge members and load them on a transport vehicle, which facilitates transport and carry-in operations. Furthermore, since the precast wall column member can be in the deployed position, positioning of the precast wall column member with respect to the precast floor slab member is easy, and the joining operation is facilitated.

  Further, according to the present invention, in the above configuration, the precast wall column member (12) is formed by integrally forming the wall column (2) and the end portion (1b) of the floor slab (1), A filling material filling groove (42) opened upward is formed between the precast floor slab member (11) and the precast wall thickness filling member when the balustrade member is in the deployed position, and the filling material filling groove (42) is formed. The bottom wall (22, 32) which forms the bottom face of) may be integrally formed on at least one of the precast floor slab member (11) and the precast wall cross section member.

  According to this configuration, since the bottom wall forms the bottom of the filler filled groove and the filler filled groove opens upward, there is no need to separately provide a filling form, and the filling operation is easy. In addition, it is possible to perform the laying operation in the filling material filling groove and the filling work to the filling material filling groove on the floor slab. Therefore, the joining operation of the precast wall panel is easier.

  Further, according to the present invention, in the above configuration, the precast wall box member (12) has a shape obtained by cutting a lower portion of the wall box (2), and the precast wall box member is in the deployed position. A filling material filling groove (72) opened inward in the bridge width direction is formed between the precast floor slab member (11) and the precast wall column member, and the bottom surface of the filling material filling groove (72) is formed. The bottom wall (62) may be integrally formed on at least one of the precast floor slab member (11) and the precast wall cross member.

  According to this configuration, the bottom wall forms the bottom of the filler-filled groove, and the filler-filled groove opens inward in the bridge width direction, so an inner mold for filling is required but the outer mold is There is no need to provide it separately. In addition, on the floor plate, it is possible to perform a formwork assembly operation, a layout operation in the filler filling groove, and a filling operation in the filler filling groove. Therefore, the joining operation of the precast wall panel is easier. Furthermore, the height dimension of the precast bridge member can be reduced when the precast wall post member is in the folded position.

  Further, according to the present invention, in the above-mentioned configuration, a hinge connecting member (13) for connecting the precast floor slab member (11) and the precast wall box member (12) is in the deployed position. At a certain time, it may be arranged inside the filler filled groove (42, 72).

  According to this configuration, the filler can be filled into the filler-filled groove while the precast floor slab member and the precast wall column member are hinged to each other. Therefore, there is no need to carry out the operation of removing the hinge coupling member or the operation of fixing the precast wall column member at the hinge coupling portion, and the joining operation is easy.

  Further, according to the present invention, in the above-mentioned configuration, a first hinge member (25) in which the hinge coupling member (13) is integrally provided on the precast floor slab member (11), and the precast wall box member (12) A second hinge member (35) provided integrally with the first and second hinge members, and a shaft member (37) inserted into a hole provided in the first and second hinge members, and one of the first and second hinge members It is preferable that the hole of the above is a long hole.

  According to this configuration, it is possible to adjust the position of the precast wall panel in the deployed position. Therefore, even if an installation error occurs at the time of installation of the precast bridge member, the installation error can be absorbed at the position of the precast wall column member.

  Further, according to the present invention, in the above-mentioned configuration, the precast floor plate member (11) extends inside the filling material filled groove (42, 72), and the expanded position of the precast wall cross member (12) It is good to set it as the structure integrally provided with the control member (27) which controls the movement to the side.

  According to this configuration, it is possible to prevent the precast wall column member from colliding with the precast floor slab member and damaging it when expanding the precast wall column member.

  Further, according to the present invention, in the above-mentioned configuration, the restriction member (27) is displaceably attached to a rod-like member (27a) integrally provided on the precast floor slab member (11) and a tip of the rod-like member. And a position adjusting member (27b) for adjusting the position of the precast wall box member in contact with the precast wall box member (12).

  According to this configuration, by changing the position of the position adjustment member, the position of the precast wall post can be easily adjusted.

  Further, according to the present invention, in the above-mentioned configuration, each of the precast floor slab member (11) and the precast wall column member (12) is a connection rebar (wherein the filling material filled grooves (42, 72) are disposed) 26, 36) may be integrally provided.

  According to this configuration, since it is not necessary to connect the rebar in the bridge width direction to the precast floor slab member and the precast wall column member after arranging the precast wall column member at the deployed position, the arranging operation for joining is easy. .

  As described above, according to the present invention, it is possible to provide a precast bridge member which is easy to carry and carry in and to be easily joined to the floor plate of the precast wall column.

Front view of a PCa bridge member in a folded state according to the first embodiment The principal part enlarged view of the PCa bridge member shown in FIG. 1 Principal part enlarged view of PCa bridge member in unfolded state The principal part enlarged view of the PCa bridge member in the state where the PCa cross member was joined. View of arrow V in FIG. 4 Figure showing the packing form of the PCa bridge member shown in Fig. 1 during transportation Front view of the PCa bridge member in a folded state according to the second embodiment Principal part enlarged view of PCa bridge member in unfolded state Principal part enlarged view of PCa bridge member before filling material filling The principal part enlarged view of the PCa bridge member in the state where the PCa cross member was joined.

  Hereinafter, an embodiment of a precast bridge member according to the present invention will be described in detail with reference to the drawings. In the drawings, a part of the members provided in the concrete is indicated by a solid line as if transparently showing the concrete.

First Embodiment
First, the first embodiment will be described with reference to FIGS. 1 to 6. As shown in FIG. 1, the precast bridge member (hereinafter referred to as PCa bridge member 10) has a long shape in the horizontal direction (hereinafter referred to as the bridge width direction) orthogonal to the bridge axis, and spans between the bridge piers. They are installed side by side in the direction of the bridge axis on a plurality (four in the present embodiment) of main rails not shown, which are delivered, to construct the floor slab 1 of the girder bridge and the wall column 2 (see FIG. 4). The PCa bridge member 10 may be made of reinforced concrete (RC) or prestressed concrete (PC), and is manufactured in advance in a factory and transported to the site. In addition, the girder bridge whose upper structure is composed of the PCa bridge member 10, the main girder, the cross girder, etc. is a girder girder bridge (composite bridge) whose main girder is an I-shaped girder or a box girder whose main girder is steel. And the main girder may be a PC bridge (concrete bridge) composed of PC girder. Girder bridges are used as road bridges, railway bridges, aqueducts and footbridges. The PCa bridge member 10 may be used at the time of new construction of a girder bridge, and may be used at the time of rebuilding of a girder bridge.

  The PCa bridge member 10 is a pair of rectangular plate-shaped precast floor slab members (hereinafter referred to as PCa floor slab members 11) long in the bridge width direction and a pair of hinged ends of the PCa floor slab member 11 in the bridge width direction. And a precast wall column member (hereinafter referred to as PCa column member 12). FIG. 1 shows a state (hereinafter referred to as a folded state) in which the PCa cross member 12 is in the folded position extending in the bridge width direction along the PCa floor plate member 11 above the PCa floor plate member 11. The folded state is taken when the factory-produced PCa bridge member 10 is transported to the site. In addition, the PCa bridge member 10 transported to the site may be in a folded state when it is carried on the main girder after being placed temporarily from the transport vehicle 52 (FIG. 6) directly or in a yard.

  The PCa floor slab member 11 has a width that forms most of the central portion 1a excluding both ends in the bridge width direction of the floor slab 1 (see FIG. 4). The axial length of the PCa floor member 11 in the bridge axial direction is 3.2 m or less so that the public road can be transported by a vehicle, and is 3.0 m in this embodiment. The upper surface of the PCa floor member 11 is a flat surface, and four thickened portions 12 a are formed on the lower surface of the PCa bridge member 10 at positions corresponding to the main girder.

  The PCa cross member 12 has one end 1b (see FIG. 4) in the bridge width direction of the floor slab 1 and the wall cross column 2 (see FIG. 4) erected on the edge in the bridge width direction of the floor slab 1 The whole is integrally formed. In the folded state, the PCa balustrade member 12 is supported by the hinge coupling member 13 and the rack 14 disposed on the PCa deck member 11 and is fixed to the PCa deck member 11 by its own weight. . The axial length of the PCa cross member 12 in the bridge axis direction is equal to that of the PCa floor plate member 11.

  The detailed structure of the PCa floor plate member 11 and the PCa balustrade member 12 and the structure of the hinge coupling member 13 will be described with reference to FIG. FIG. 2 is an enlarged view of the main part (right part) of FIG. 1. In the imaginary line in FIG. 2, the PCa cross member 12 shown by the solid line is expanded and extends vertically to the side end of the PCa floor member 11 The state (hereinafter referred to as a deployed state) in the deployed position facing the end face of the part is shown.

  The PCa floor slab member 11 is directed outward from the lower part of the end face in the bridge width direction of the plate-like floor slab main portion 21 constituting the entire thickness of the floor slab 1 and the floor slab main portion 21. And an inner floor plate lower wall 22 that protrudes. A backup material 45 is attached to the end of the inner floor plate lower wall 22. In the floor slab main portion 21, a first hinge member 25 made of a steel plate is integrally provided so as to project outward from the end face in the bridge width direction. The first hinge member 25 extends in the vertical direction, and a long hole (not shown) extending in the bridge width direction penetrates the first hinge member 25 in a portion projecting from the floor slab main portion 21. Is formed. The first hinge members 25 are provided at two places spaced apart in the bridge axis direction of the PCa floor plate member 11. In addition, the connection rebar 26 is integrally provided on the floor slab main portion 21 so as to project outward from the end face in the bridge width direction. The connecting rebar 26 is composed of a plurality of loop bars arranged at predetermined intervals in the bridge axis direction.

  As shown in FIG. 3, in the floor slab main portion 21, a restricting member 27 for restricting the movement of the PCa cross member 12 to the deployed position side protrudes outward from the end face in the bridge width direction. Provided integrally with the The restricting member 27 is screwed with the rod-like member 27a formed of a steel rod having an external thread formed at least at its tip end and the tip of the rod-like member 27a and abuts against the PCa cross-bar member 12 It is comprised by the long nut 27b which controls the inward movement of direction. The long nut 27b is displaced in the axial direction of the rod-shaped member 27a by rotating around the rod-shaped member 27a, and also functions as a position adjusting member for adjusting the position of the PCa balustrade member 12. The restriction members 27 are provided at two places separated in the bridge axis direction of the PCa floor plate member 11.

  As shown in FIG. 2, an insert nut 28 is embedded at a position spaced inwardly in the bridge width direction from the edge of the upper surface of the floor slab main portion 21.

  The PCa column member 12 has a block-shaped floor slab end 31 forming the entire thickness of the floor slab 1 and a lower portion of the inner surface in the bridge width direction of the floor slab end 31 (based on the unfolded state). Unless otherwise specified, the same applies to the outer floor plate lower wall 32 projecting inward in the bridge width direction from the bridge side, and the column projecting upward from the bridge width direction exterior on the upper surface of the floor plate end 31 And a part 33. The balustrade portion 33 has a tapered shape in which the wall thickness increases toward the lower side, and a ground covering portion 34 projecting inward in the bridge width direction is integrally formed at the lower portion.

  A pair of second hinge members 35 made of steel plates are integrally provided on the floor plate end portion 31 so as to protrude inward in the bridge width direction from the inner surface. The second hinge members 35 extend in the vertical direction, and are disposed to face each other with a distance substantially equal to the thickness of the first hinge members 25. A through hole (not shown) of circular cross section is coaxially formed in each of the portions of the second hinge member 35 projecting from the floor plate end 31. The pair of second hinge members 35 are provided at two positions of the PCa cross member 12 corresponding to the first hinge members 25. In addition, the connection rebar 36 is integrally provided on the floor slab end 31 so as to protrude inward in the bridge width direction from the inner surface. The connecting rebar 36 is configured as a plurality of loop bars arranged at predetermined intervals in the bridge axis direction.

  In a state where the first hinge member 25 is disposed between the pair of second hinge members 35, a bolt 37 as a shaft member is inserted into the elongated hole of the first hinge member 25 and the through hole of the second hinge member 35. By screwing a nut (not shown) to the bolt 37, the bolt 37 is prevented from coming off. Thus, the hinge connecting member 13 is configured by the first hinge member 25, the second hinge member 35 and the bolt 37, and the PCa cross member 12 can be in the folded position and the expanded position by the hinge connecting member 13. It is hinged to the floor slab member 11. When the bolt 37 and the nut are in a loose state, the PCa column member 12 is capable of rotational movement about the bolt 37 and horizontal movement along the elongated hole. On the other hand, when the bolt 37 and the nut are tightened, the rotational movement and the horizontal movement of the PCa column member 12 are blocked.

  Insert nuts 38 and 39 are embedded in the upper surface of the inner surface of the balustrade 33 and the upper surface of the floor plate end 31. The mounting bracket 41 is attached to the insert nut 38 of the mounting portion 33 of the PCa column member 12 and is deployed (rotationally moved) to the deployed position by being lifted by a crane via the mounting bracket 41 or the like. Deployment of the PCa cross member 12 may be performed in a temporary yard before the PCa bridge member 10 is erected on the main girder, or may be performed after the PCa bridge member 10 is erected on the main girder . Since the PCa cross member 12 is relatively lightweight, when the PCa cross member 12 is expanded after the PCa bridge member 10 is erected on the main girder, it is prepared separately from the crane for erecting the PCa bridge member 10 A small crane may be placed on the girder bridge, and the crane may be used to deploy the PCa balustrade 12. Alternatively, the PCa balustrade member 12 may be deployed using a jack, a dedicated push-up device, a chain block or the like.

  FIG. 3 shows a state in which the PCa column member 12 is developed. In the unfolded state, a bottomed filler filling groove 42 opened upward is formed between the PCa floor plate member 11 and the PCa cross member 12. The bottom surface of the filler filling groove 42 is formed by the inner floor plate lower wall 22 protrudingly formed on the PCa floor plate member 11 and the outer floor plate lower wall 32 protrudingly formed on the PCa cross member 12. That is, the inner floor plate lower wall 22 and the outer floor plate lower wall 32 form the bottom wall of the filling material filling groove 42. The gap between the outer floor plate lower wall 32 and the inner floor plate lower wall 22 is closed by the backup material 45. Further, in the unfolded state, the connecting reinforcing bars 26 and 36 provided on the PCa floor plate member 11 and the PCa balustrade member 12 are disposed inside the filler filling groove 42. Furthermore, the hinge coupling member 13 (see FIG. 4) and the regulating member 27 are also disposed inside the filling material filling groove 42.

  The rotational movement of the PCa column 12 is blocked by the hinge joint 13 when the bolt 37 and the nut are tightened, but when the bolt 37 and the nut are loosened to deploy the PCa column 12 the hinge joint Not blocked by 13. Therefore, there is a possibility that the outer floor plate lower wall 32 collides with the inner floor plate lower wall 22 at the time of the expansion operation of the PCa cross member 12, and one or both may be broken. In this embodiment, since the restricting member 27 is integrally provided on the PCa floor member 11, the restricting member 27 is attached to the PCa cross member 12 at a position where the outer floor plate lower wall 32 does not collide with the inner floor plate lower wall 22. The length of the regulating member 27 is adjusted by rotating the long nut 27 b so as to abut and regulate its rotational movement.

  After the unfolding operation of the left and right PCa column members 12, the position adjustment of the PCa column members 12 is performed. Since the long hole long in the bridge width direction is formed in the first hinge member 25, the PCa balustrade member 12 can move horizontally in the bridge width direction. The position of the PCa column member 12 is adjusted so that the effective width between the land covering portions 34 integrally formed on the left and right column portions 33 does not fall below the design size. In addition, when the expansion work of the PCa cross member 12 is performed after the installation of the PCa bridge member 10, it is adjusted so that the street of the cross portion 33 of the PCa bridge member 10 installed first matches.

  Along with the positional adjustment in the horizontal direction, the inclination adjustment of the PCa column member 12 and the prevention of the outward shift of the bridge width direction are performed. In these operations, as shown in the figure, for example, the jig 43 is attached to the insert nuts 28, 38, 39 embedded in the floor plate main portion 21, the cross section 33 and the floor plate end 31, and lever block (registered trademark) It is performed by fixing the distance between the jigs using 44 and the like. After the position of the PCa cross member 12 is fixed, the bridge axial rebar 46 is disposed in the inside of the filling material filling groove 42 (inside of the loop-like connected reinforcing bars 26 and 36, etc.).

  Thereafter, as shown in FIG. 4, the filler filling groove 42 is filled with the filler 47. The hinge connection member 13 and the restriction member 27 (FIG. 3) made of steel are buried in the filling material 47, respectively. As the filler 47, a cement-based filler such as concrete or mortar may be used. Thereby, the PCa column member 12 is joined (unified) to the PCa floor plate member 11. After the filling material 47 is hardened, the lever block 44 and the jig 43 are removed and used in the bonding operation of the PCa bridge member 10 to be installed next.

  The PCa bridge member 10 is also connected to the previously installed PCa bridge member 10 using a known method. In many cases, concrete is cast at the connection part of the floor slab 1. In this case, the number of times the concrete is cast is reduced by casting concrete as a filler 47 at the same time as the connector concrete. Be done.

  On the other hand, the box 33 is connected as follows. That is, as shown in FIG. 5, the shear key 48 is formed in advance on the end surface in the bridge axis direction of the mutually adjacent balustrades 33. Moreover, the backup material 49 is previously affixed along the inner surface and outer surface of the bridge width direction to the bridge shaft direction end surface of one or both balustrades 33. In the state where the PCa bridge member 10 is installed on the main girder, and the PCa column member 12 is expanded and joined to the PCa floor slab member 11, the column portions 33 adjacent in the bridge axial direction face each other with a predetermined gap. Both ends inside and outside of the gap are closed by the backup material 49. In this state, the entire space including the shear key 48 is filled with the filling material 50 such as mortar. Thereby, the box sections 33, 33 are connected with each other.

  As described above, the floor slab 1 and the wall column 2 of the girder bridge are constructed by sequentially installing the plurality of PCa bridge members 10 on the main girder and connecting them to the previously installed PCa bridge member 10.

  As shown in FIG. 1, the PCa bridge member 10 configured in this manner includes the PCa floor slab member 11 and the PCa cross-bar member 12 so that the PCa cross-bar member 12 can be in the folded position and the open position. Since the PCa floor plate member 11 and the PCa floor member 12 are hinged to the PCa floor plate member 11, they can be collectively transported or carried in (constructed). In addition, since the PCa cross member 12 can be folded, as shown in FIG. 6, a plurality of PCa bridge members 10 are stacked vertically in a plurality of tiers via a tie 51 made of I-shaped steel etc. It is possible to load on the transport vehicle 52, and transport and carry-in operations are easy. Furthermore, since the PCa cross member 12 can be in the unfolded position, the positioning of the PCa cross member 12 with the PCa floor plate member 11 is easy, and the joining operation becomes easy.

  In the present embodiment, as shown in FIG. 3, when the PCa balustrade member 12 integrally forms the wall balustrade 2 and the end portion 1 b of the floor slab 1 and the PCa balustrade member 12 is in the unfolded position, PCa A filling material filling groove 42 opened upward is formed between the floor slab member 11 and the PCa cross member 12, and the inner floor plate lower wall 22 and the outer floor plate lower wall 32 forming the bottom of the filling material filling groove 42. Since at least one is integrally formed on the PCa floor plate member 11 or the PCa cross member 12, it is not necessary to separately provide a filling form, and the filling operation of the filling material 47 is easy. In addition, it is possible to perform a laying operation in the filling material filling groove 42 and a filling work of the filling material 47 into the filling material filling groove 42 on the floor slab 1. Thereby, the joining operation of the PCa cross member 12 becomes easier.

  Further, as shown in FIG. 4, by arranging the hinge coupling member 13 inside the filling material filling groove 42, the filling material remains with the PCa floor plate member 11 and the PCa cross member 12 hinged together. The filler filling groove 42 can be filled with 47. That is, there is no need to perform the operation of removing the hinge coupling member 13 or the operation of fixing the PCa column member 12 at the hinge coupling portion, and the joining operation is easy.

  In the present embodiment, the hinge coupling member 13 includes the first hinge member 25 provided on the PCa floor plate member 11, the second hinge member 35 provided on the PCa cross member 12, and both hinge members 25 and 35. By providing a bolt 37 inserted into the provided hole, and one of the holes of both hinge members 25 and 35 being a long hole, the position of the PCa balustrade member 12 in the deployed position can be adjusted. Therefore, even if an installation error occurs at the time of installation of the PCa bridge member 10, it is possible to absorb the installation error at the position of the PCa cross member 12.

  Further, as shown in FIG. 3, the PCa floor slab member 11 integrally includes a regulating member 27 that extends inside the filler filling groove 42 and regulates movement of the PCa column member 12 to the deployed position side. As a result, when the PCa cross member 12 is expanded, the PCa cross member 12 is prevented from colliding with the PCa floor member 11 and being damaged.

  Further, the restricting member 27 is attached to a rod-like member 27a integrally provided on the PCa floor plate member 11 and a tip of the rod-like member 27a so as to be displaceable, abuts on the PCa crossbar 12 and positions the PCa crossbar 12 By having the long nut 27b to be adjusted, the position of the long nut 27b can be easily adjusted by changing the position of the long nut 27b.

  In addition, the PCa floor member 11 and the PCa balustrade member 12 integrally include the connecting rebars 26 and 36 disposed inside the filling material filling groove 42, whereby the PCa balustrade member 12 is placed in the deployed position and then the bridge is formed. Since it is not necessary to connect the reinforcing bars in the width direction to the PCa floor plate member 11 and the PCa cross member 12, it is easy to arrange the reinforcing bars for joining.

Second Embodiment
Next, a second embodiment will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected to an element which is the same as that of 1st Embodiment, or a function, or a function, and the overlapping description is abbreviate | omitted.

  In the PCa bridge member 10 of the present embodiment, the PCa floor slab member 11 has the same width as the full width of the floor slab 1, and constitutes the entire bridge width direction of the floor slab 1. On the other hand, the PCa column member 12 has a shape obtained by cutting the inside of the lower portion of the wall column 2 erected at the end edge in the bridge width direction of the floor slab 1.

  The PCa floor member 11 is integrally provided with a first hinge member 25 so as to protrude upward from the upper surface of the end. The first hinge member 25 extends in the bridge width direction, and a long elongated hole (not shown) in the vertical direction is formed to penetrate through the portion projecting from the PCa floor plate member 11. Further, the connecting reinforcing bars 26 and the regulating member 27 are integrally provided on the PCa floor slab member 11 so as to project upward from the upper surface of the end portion. Further, a backup material 45 is attached to the edge in the bridge width direction on the upper surface of the PCa floor slab member 11.

  The PCa column member 12 projects downward from the bottom surface of the column main portion 61 constituting the entire wall thickness at the top of the wall column 2 and the bottom surface of the column main portion 61 and exhibits a tapered shape which becomes thinner toward the bottom And an outer wall 62 forming an outer portion in the direction of the bridge width of the two. A pair of second hinge members 35 are integrally provided on the PCa column member 12 so as to protrude generally downward from the tapered surface of the column outer wall 62. Further, the connecting reinforcing bars 36 are integrally provided on the PCa column member 12 so as to protrude generally downward from the tapered surface of the column outer wall 62.

  The PCa cross-bar member 12 is formed by the first hinge member 25, the second hinge member 35, and the bolt 37 along the PCa floor plate member 11 above the PCa floor plate member 11 in the bridge width direction by the hinge coupling member 13. It is hinged to the PCa deck member 11 so as to be able to assume a folding position shown by an extending solid line and an expanding position shown by an imaginary line extending vertically and facing the upper surface of the side end of the PCa deck member 11 It is done.

  FIG. 8 shows a state in which the PCa column member 12 is developed. In the unfolded state, a bottomed filler filled groove 72 opened inward in the bridge width direction is formed between the PCa floor member 11 and the PCa cross member 12. The bottom surface of the filling material filling groove 72 is formed by the outside wall 62 formed to project from the PCa column 12. That is, the outer side wall 62 is the bottom wall of the filler filled groove 72. The gap between the outer column wall 62 and the PCa floor plate member 11 is closed by the backup material 45.

  In the present embodiment, since the long hole elongated in the vertical direction is formed in the first hinge member 25 (FIG. 7), the PCa balustrade member 12 can move in the vertical direction. Therefore, in the position adjustment of the PCa cross member 12 performed after the expansion of the left and right PCa cross members 12, the height of the PCa cross member 12 with respect to the PCa cross member 12 of the previously constructed PCa bridge member 10 passes To be adjusted. In addition, the inclination adjustment of the PCa column member 12 is performed together with the position adjustment in the vertical direction. This operation is performed, for example, by attaching a jig 43 to the insert nuts 28 and 38 embedded in, for example, the PCa floor plate member 11 and the PCa floor member 12 as illustrated, and fixing the distance between the jigs. After the position of the PCa cross member 12 is fixed, the bridge axial rebar 46 is disposed in the inside of the filling material filling groove 72 (inside the loop-like connected reinforcing bars 26 and 36, etc.).

  Further, as shown in the drawing, sheaths 74 and 75 extending in the vertical direction are provided inside the PCa floor plate member 11 and the PCa cross member 12, and both sheaths 74 and 75 linearly arranged in the unfolded state are provided. A PC steel rod 76 may be inserted therein to introduce prestress after hardening of the filler 47 (FIG. 10). In this case, the embedded anchor plate 77 formed with an internal thread is embedded in the lower surface of the PCa floor plate member 11 so as to connect to the lower end of the sheath 74 on the PCa floor plate member 11 side, and inserted from the upper surface of the PCa cross member 12 The external screw formed on the lower end of the PC steel rod 76 is screwed in to fix it to the embedded anchor plate 77. With such a configuration, work under the PCa floor plate member 11 requiring a scaffold does not occur. Further, the embedded anchor plate 77 may be covered with an epoxy powder coating cap 78 and filled with a filling material such as wax to prevent corrosion and reduce maintenance burden. On the other hand, it is preferable to form a recess 61a on the upper surface of the main column 61 so that the embedded anchor plate 79 for fixing the upper end of the PC steel rod 76 is not exposed to the outside and arrange the embedded anchor plate 79 at the bottom of the recess 61a. .

  As shown in FIG. 9, both sheaths 74, 75 are connected by a connecting sheath 80 prior to assembly of the inner formwork 73. After assembly of the inner formwork 73 for filling, the filling material filling groove 42 is filled with the filling material 47. As shown in FIG. 10, after curing of the filling material 47, the PC steel rod 76 is tensioned on the upper surface of the PCa cross member 12 using a tension jack (not shown) and fixed to the embedded anchor plate 79 using a tension jack not shown. Thereafter, grout is injected into the sheaths 74, 75, 80, and the filling material 81 is filled in the recess 61a, and the waterproof coating 82 is formed to perform waterproofing. Thereby, the PCa column member 12 is joined (unified) to the PCa floor plate member 11. The use of the PC steel rod 76 is optional, and the PCa cross member 12 may be joined to the PCa floor plate member 11 only by the filler 47 filled in the filler filling groove 72.

  Thus, in the PCa bridge member 10 of the present embodiment, as shown in FIG. 9, when the PCa cross member 12 has a shape in which the lower part of the wall cross 2 is notched and the PCa cross member 12 is in the deployed position, A filling material filling groove 72 opened inward in the bridge width direction is formed between the PCa floor plate member 11 and the PCa cross member 12, and the outside wall 62 forming the bottom surface of the filling material filling groove 72 is a PCa floor plate member 11 and at least one of the PCa column members 12 are integrally formed. Thereby, it is not necessary to separately provide an outer form for filling. In addition, it is possible to perform a formwork assembly operation, a layout operation in the filler filling groove 42 and a filling operation of the filler 47 in the filler filling groove 42 on the floor plate 1. Therefore, the bonding operation of the PCa cross member 12 becomes easier.

  Although the description of the specific embodiments has been described above, the present invention is not limited to these embodiments, and various modifications can be made without departing from the spirit of the present invention. For example, in the above embodiment, although the PCa floor slab member 11 constitutes substantially the entire width of the floor slab 1, the PCa floor slab member 11 is divided in the bridge width direction, and the PCa floor slab provided at the end in the bridge width direction The PCa bridge member 10 may be configured by the printing plate member 11 and the one PCa cross member 12 hinged thereto. On the other hand, each component of the PCa bridge member 10 according to the present invention shown in the above embodiment is not necessarily all essential, and can be selected as appropriate without departing from the spirit of the present invention.

Reference Signs List 1 floor plate 1b end 2 wall column 10 PCa bridge member 11 PCa floor member 12 PCa cross member 13 hinge joint member 22 inner floor plate lower wall (bottom wall)
25 1st hinge member 26 connection reinforcing bar 27 restriction member 27a rod member 27b long nut (position adjustment member)
32 Outer floor plate lower wall (bottom wall)
35 second hinge member 36 connection reinforcing bar 37 bolt (shaft member)
42 Filler-filled groove 62 Double-bar outer wall (bottom wall)
72 Filler filled groove

Claims (6)

A precast bridge member,
A precast floor slab member, and a precast wall panel member joined to an end of the precast floor slab member in the bridge width direction,
The precast wall column member extends vertically along the folding position extending along the precast floor plate member above the precast floor plate member, and faces the side end of the precast floor plate member being hinged to the precast slab member so as to can take the deployed position to,
The precast wall column member is formed integrally with the wall column and the end of the floor plate,
A filling material filling groove opening upward is formed between the precast floor slab member and the precast wall post member when the precast wall post member is in the deployed position,
A precast bridge member characterized in that a bottom wall forming a bottom surface of the filler filled groove is integrally formed on at least one of the precast floor slab member and the precast wall column member. A hinge connection member for connecting the precast floor slab member and the precast wall post member is disposed inside the filler filled groove when the precast wall post member is in the deployed position. precast bridge member according to 1. The hinge joint member is provided on a first hinge member integrally provided on the precast floor slab member, a second hinge member integrally provided on the precast wall cross member, and the first and second hinge members The precast bridge member according to claim 2 , further comprising: a shaft member inserted into the hole, wherein one of the holes of the first and second hinge members is a long hole. The precast slab member, said extending into the interior of the filling material filling the grooves, according to claim 1, characterized in that it comprises a regulating member together for restricting movement to the deployed position side of the precast wall railing members - The precast bridge member in any one of Claim 3 . The restricting member is displaceably attached to a rod-like member integrally provided on the precast floor slab member and a tip end of the rod-like member, and abuts on the precast wall cross member to adjust the position of the precast wall cross member The precast bridge member according to claim 4 , further comprising: a position adjustment member. The precast according to any one of claims 1 to 5 , wherein each of the precast floor slab member and the precast wall column member is integrally provided with a connected reinforcing bar disposed inside the filler filled groove. Bridge member.

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