JP2018112009A - Vertical member installation structure, vertical member installation method, and precast vertical member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vertical member installation structure, a vertical member installation method, and a precast vertical member used in said structure and said method, allowing a precast vertical member to be easily installed onto a horizontal member.SOLUTION: A balustrade installation structure 2 (vertical member installation structure) comprises a precast wall balustrade 100 (precast vertical member) including: a body part 110 in which floor slab inserts 113 (horizontal member insert) are buried near an underside 112 facing a floor slab 300 (horizontal member) side, through openings in the underside 112; and anchor reinforcements 150 each having a screw part to be fitted in one end of the floor slab insert 113 and an edge 152 which performs a role as an anchor for the floor slab 300. The edge 152 of the anchor reinforcement 150 is inserted into a top side 300a of the floor slab 300, and an anchor hole 302 to be filled with a cement material 303 is formed.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a vertical member installation structure in which a precast vertical member is installed along a longitudinal direction of a horizontal member of a structure, a vertical member installation method, and a precast vertical member used in those structures and methods.

  Conventionally, as an example of construction when a vertical member that is integrated with a horizontal member of an existing structure is updated, or when a horizontal member is pre-casted when a new structure is installed, Construction related to bridges can be mentioned. Many bridges on roads and railways have wall rails as vertical members installed at both edges in the width direction of a floor slab as a horizontal member. Wall railings were generally constructed from cast-in-place concrete at the time of initial installation and repair, but in recent years, precast wall railings pre-formed at the factory have been installed along the longitudinal direction of the floor slab at the site. (For example, refer to Patent Document 1).

Japanese Patent No. 585757

  Here, the installation of the precast wall rail is often performed by connecting the reinforcing bar of the precast wall rail and the reinforcing bar of the floor slab, or fastening with a bolt penetrating the precast wall rail and the floor slab. However, depending on the structure of the precast wall rails and floor slabs, it may be difficult to transport the precast wall rails to the site or connect to the floor slabs.

  In addition, up to here, as an example of the construction for installing the precast vertical member on the horizontal member, the construction for installing the precast wall rail on the floor slab is cited, and the problem of difficulty in connecting the two has been described. However, such a problem is not limited to the construction in which the precast wall rail is installed on the floor slab, but can be generally caused by the construction in which the precast vertical member is installed on the horizontal member.

  The present invention aims to solve this problem. That is, the present invention provides a vertical member installation structure, a vertical member installation method, and a precast vertical member used in these structures and methods, which can easily install a precast vertical member on a horizontal member. It is aimed.

  In order to achieve the above object, the vertical member installation structure of the present invention is a vertical member installation structure in which a precast vertical member is installed along the longitudinal direction on a horizontal member extending in a predetermined longitudinal direction, The precast vertical member is made of concrete, and in the vicinity of the lower surface facing the horizontal member side, a main body portion in which a horizontal member insert is embedded in an open state on the lower surface, and one end is fitted into the horizontal member insert. The other end of the anchor reinforcing bar on the upper surface of the horizontal member facing the vertical member side of the precast. Is inserted and an anchor hole filled with a cement material is formed.

  In the vertical member installation structure of the present invention, the precast vertical member is provided with a main body part that is separate from the anchor reinforcing bar that serves as an anchor for the horizontal member. As a result, the precast vertical member can be constructed by transporting the main body portion and the anchor rebar separately to the work site, and it is possible to easily realize prevention of bending of the anchor rebar during transportation. Moreover, the anchor rebar can be easily attached on site by being fitted into the horizontal member insert of the main body. For the horizontal member, it is only necessary to fill the cement material by drilling the anchor hole. Thus, according to the vertical member installation structure of the present invention, the precast vertical member can be easily installed on the horizontal member.

  Here, in the vertical member installation structure of the present invention, at least the anchor hole in the vertical member side region surrounding at least the opening of the horizontal member insert in the lower surface of the precast vertical member, and in the upper surface of the horizontal member. It is preferable that an adhesive resin is sandwiched between the vertical member-side region and the horizontal member-side region facing the opening.

  According to this preferred vertical member installation structure, the installation strength of the precast vertical member can be enhanced by the adhesive resin.

  Further, in this preferred vertical member installation structure, between the lower surface of the precast vertical member and the upper surface of the horizontal member, along the outer edge of the vertical member side region and the horizontal member side region. More preferably, an annular resin packing is sandwiched, and the adhesive resin is filled inside the resin packing, and a non-shrink mortar is filled outside the resin packing.

  According to this more preferable vertical member installation structure, since the usage amount of the adhesive resin, which tends to be expensive, can be suppressed, the construction cost can be reduced. Further, since the flow of the adhesive resin before curing is suppressed by using the resin packing, the precast vertical member can be more easily installed while reducing the construction cost as described above. Furthermore, the installation strength of the precast vertical member can be further increased by the non-shrink mortar outside the resin packing.

  In the vertical member installation structure of the present invention, it is also preferable that a plurality of the horizontal member inserts are embedded in each of the plurality of embedded regions arranged in the longitudinal direction in the vicinity of the lower surface. .

  According to this preferred vertical member installation structure, a plurality of horizontal member inserts are embedded in each of the plurality of embedded regions, whereby the installation strength of the precast vertical member can be increased. And since it becomes possible to select what is used for installation of a precast vertical member from a plurality of inserts for horizontal members based on, for example, the position of an anchor hole determined by the structure of the horizontal member, The vertical member can be more easily installed on the horizontal member.

  In the vertical member installation structure of the present invention, it is also preferable that the horizontal member insert includes a nut portion into which the screw portion is fitted, and a reinforcing bar portion with one end connected to the nut portion. .

  According to this preferred vertical member installation structure, since the embedding strength of the horizontal member insert is enhanced by the above-mentioned reinforcing bar, the installation strength of the precast vertical member can be further enhanced.

  Moreover, in this preferable vertical member installation structure, it is further preferable that the rebar portion of the horizontal member insert has an end opposite to the nut portion side connected to the internal rebar of the main body portion. It is.

  According to this more preferable vertical member installation structure, since the embedding strength of the horizontal member insert is further enhanced by the connection of the above-mentioned reinforcing bar portion to the internal reinforcing bar of the main body portion, the installation strength of the precast vertical member is increased. Can be further strengthened.

  Further, in the vertical member installation structure of the present invention, each of the precast vertical members extends in the longitudinal direction and is arranged in a plurality along the longitudinal direction. A connecting insert is embedded in the vicinity of the first side surface of both sides of the main body portion of the vertical member in the vicinity of the first side surface, and the second side surface has a height of the main body portion. A connecting groove extending in the vertical direction is formed, one end is connected to the connecting insert, and a bolt head is fitted into the connecting groove in the main body portion of the adjacent precast vertical member, When the connecting groove is filled with non-shrinkable mortar, the precast vertical member further serves as an anchor bolt serving as an anchor for the adjacent precast vertical member. It is preferable to provided.

  According to this preferred vertical member installation structure, anchor bolts used for connecting adjacent precast vertical members can be transported to the site separately from the main body portion, so that bending of anchor bolts during transportation is prevented. Etc. can be easily realized. Also, anchor bolts can be easily attached on site by being fitted into the connecting insert of the main body. As described above, according to the above preferred vertical member installation structure, it is possible to more easily install the precast vertical member on the horizontal member from the viewpoint of connection between adjacent precast vertical members.

  In this preferred vertical member installation structure, the connecting insert further includes a nut portion into which the one end of the anchor bolt is fitted, and a reinforcing bar portion with one end connected to the nut portion. Is preferred.

  According to this more preferable vertical member installation structure, since the strength of the connecting insert is enhanced, a high connection strength can be obtained between adjacent precast vertical members.

  In the above-described preferred vertical member installation structure in which a connecting insert and a connecting groove are provided in the main body, it is further preferable that the connecting groove is a groove fitting embedded in the second side surface. .

  According to this more preferable vertical member installation structure, since the strength of the connection groove is also increased, higher connection strength can be obtained between adjacent precast vertical members.

  In this more preferable vertical member installation structure, it is more preferable that the main body is embedded with a reinforcing bar for a groove whose one end is connected to the groove fitting.

  According to this more preferable vertical member installation structure, since the strength of the connecting groove is further enhanced by the reinforcing bar for the groove, higher connection strength can be obtained between the adjacent precast vertical members.

  In order to achieve the above object, the vertical member installation method of the present invention is a vertical member installation method in which a precast vertical member is installed along the longitudinal direction on a horizontal member extending in a predetermined longitudinal direction. The precast vertical member is made of concrete, and in the vicinity of the lower surface facing the horizontal member, a main body portion in which the horizontal member insert is embedded in an open state on the lower surface, and the horizontal member insert at one end. A screw portion that is fitted into the horizontal member, and the other end of the vertical member is provided with an anchor reinforcing bar that serves as an anchor for the horizontal member, and the anchor reinforcing bar is inserted into the horizontal member insert in the main body portion of the precast vertical member. On the upper surface of the horizontal member that faces the precast vertical member, the anchor reinforcement is attached to the anchor reinforcement. Forming an anchor hole into which the other end is inserted and filling the anchor hole with a cement material, and the anchor hole of the horizontal member is provided with the opposite end of the anchor reinforcing bar. And a vertical member installation step of installing the precast vertical member on the upper surface of the horizontal member so as to be inserted.

  In the vertical member installation method of the present invention, the precast vertical member can be constructed by transporting the main body part and the anchor rebar separately to the site, and it is easy to prevent the anchor rebar from being bent during transportation. Can be realized. In addition, the construction work at the site is performed through easy work, an anchor rebar installation process for attaching the anchor rebar to the horizontal member insert, and an anchor hole installation process for filling the cement material by drilling the anchor hole. . Thus, according to the vertical member installation method of the present invention, the precast vertical member can be easily installed on the horizontal member.

  Here, in the vertical member installation method of the present invention, in the vertical member installation step, an adhesive resin is applied to a horizontal member side region surrounding at least the opening of the anchor hole on the upper surface of the horizontal member, and the precast vertical Preferably, the step is a step of installing a member on the upper surface of the horizontal member.

  According to this preferred vertical member installation method, the installation strength of the precast vertical member can be enhanced by the adhesive resin.

  Further, in this preferred vertical member installation method, the vertical member installation step includes arranging an annular resin packing on the upper surface of the horizontal member along the outer edge of the horizontal member side region, and placing it inside the resin packing. It is further preferable to fill the adhesive resin and fill the non-shrink mortar outside the resin packing after the precast vertical member is installed.

  According to this more preferable vertical member installation method, the usage cost of the adhesive resin, which tends to be expensive, can be suppressed, so that the construction cost can be reduced. Further, since the flow of the adhesive resin before curing is suppressed by using the resin packing, the precast vertical member can be more easily installed while reducing the construction cost as described above. Furthermore, the installation strength of the precast vertical member can be further increased by the non-shrink mortar outside the resin packing.

  Further, in the vertical member installation method of the present invention, the precast vertical member extends in the longitudinal direction, and the vertical member installation step includes the precast vertical member in the longitudinal direction of the horizontal member. A plurality of connecting inserts arranged along the first side surface in the vicinity of the first side surface of the main body of the precast vertical member in the vicinity of the first side surface. Embedded in the second side surface, a connecting groove extending in the height direction of the body portion is formed, and the precast vertical member serves as an anchor for the adjacent precast vertical member. In the vertical member installation step, one end of the anchor bolt is attached to the connecting insert, and the anchor bolt Installing the precast vertical member so that a bolt head is fitted into the connection groove in the main body of the adjacent precast vertical member, and then filling the connection groove with a non-shrink mortar. It is also suitable.

  According to this preferred vertical member installation method, since anchor bolts used for connecting adjacent precast vertical members can be transported to the site separately from the main body, bending of the anchor bolts during transport is prevented. Etc. can be easily realized. Also, anchor bolts can be easily attached on site by being fitted into the connecting insert of the main body. Thus, according to the above preferred vertical member installation method, it is possible to more easily install the precast vertical member on the horizontal member from the viewpoint of connection between adjacent precast vertical members.

  Further, in this preferred vertical member installation method, the vertical member installation step includes disposing spacers at a plurality of locations between the lower surface of the main body and the upper surface of the horizontal member. Using the upper surface connecting bracket that adjusts the degree of horizontality and spans from the upper surface of the main body portion opposite to the lower surface to the upper surface of the adjacent precast vertical member to connect the two upper surfaces to each other. It is more preferable that the precast vertical member is installed while adjusting the heights of the two upper surfaces.

  For example, when an existing wall vertical member is removed for repair and a new precast vertical member is installed at the removal location, the precast vertical member is installed on an uneven installation surface after removal. According to the above more preferable vertical member installation method, even if there are irregularities on the installation surface, a plurality of precast vertical members are aligned with the height position of the upper surface between adjacent precast vertical members, and It can be installed with high levelness. Thereby, while being able to obtain high installation strength, a good appearance after installation can be obtained.

  In order to achieve the above object, the precast vertical member of the present invention is a precast vertical member installed along the longitudinal direction on a horizontal member extending in a predetermined longitudinal direction, and is made of concrete. In the vicinity of the lower surface facing the horizontal member side, a main body portion in which the horizontal member insert is embedded in an open state on the lower surface, and a screw portion fitted into the horizontal member insert at one end are formed, and the other end Comprising an anchor reinforcing bar serving as an anchor for the horizontal member.

  In the precast vertical member of the present invention, the main body portion and the anchor reinforcing bar can be separately transported to the site for construction, and the bending prevention of the anchor reinforcing bar during transportation can be easily realized. Moreover, the anchor rebar can be easily attached on site by being fitted into the horizontal member insert of the main body. Thus, according to the vertical member installation structure of the present invention, the precast vertical member can be easily installed on the horizontal member.

  In addition, about the vertical member installation method of this invention, the basic form and the specific form were described, and only the basic form was described about the precast vertical member of this invention. However, it goes without saying that each of the various preferred embodiments described for the vertical member installation structure of the present invention described above also corresponds to the vertical member installation method of the present invention and the precast vertical member of the present invention.

  ADVANTAGE OF THE INVENTION According to this invention, the vertical member installation structure which can install a precast vertical member in a horizontal member easily, the vertical member installation method, and the precast vertical member used with those structures and methods can be obtained. .

It is a figure which shows some bridges with which one Embodiment of this invention was applied. It is a figure which shows the precast wall height column shown by FIG. 1 including the internal structure. It is a side view which shows the V11 arrow in FIG. 2 in the precast wall height column. It is a side view which shows the V12 arrow in FIG. 2 in the precast wall height column. It is a figure which shows typically the internal structure of the bridge shown by FIG. 1 in the V13-V13 line cross section which passes through the anchor reinforcement for floor slabs in FIG. It is a figure which shows typically the internal structure of the bridge shown by FIG. 1 in the V14-V14 line cross section which passes an air vent hole in FIG. It is a figure which shows the top view when the bridge shown by FIG. 1 is seen from the arrow V16 in a figure with the adhesive resin etc. which were pinched | interposed between the railing side area | region and the floor slab side area | region. It is a schematic diagram for demonstrating an anchor reinforcement installation process, an anchor hole installation process, and a handrail installation process. It is a schematic diagram for demonstrating an anchor bolt attachment process and a handrail installation process. It is a figure which shows a mode that it fits so that the height of the upper surfaces of adjacent precast wall railings may become substantially flush in a railing installation process. It is a figure which shows the plastic spacer used in a railing installation process. It is a schematic diagram which shows a mode that filling of a non-shrink mortar is performed at a railing installation process. It is a fragmentary perspective view which pays attention to the periphery structure of the insert for floor slabs in the precast wall railing in the handrail installation structure of the modification. It is a figure which shows typically the internal structure in the V81-V81 line cross section which passes through the anchor reinforcing bar for floor slabs in FIG.

  Hereinafter, an embodiment of the present invention will be described.

  FIG. 1 is a diagram showing a part of a bridge to which an embodiment of the present invention is applied.

  FIG. 1 shows a state in which an existing wall rail 200 is repaired to the bridge 1 using a precast wall rail 100 (a precast vertical member) according to an embodiment of the present invention. . In this example, the repair target portion of the existing wall height column 200 is removed from the floor slab 300 (horizontal member), and the precast wall height column 100 is installed at the removal location 301. A plurality of precast wall rails 100 are arranged and installed along the longitudinal direction D11 of the floor slab 300.

  2 is a diagram showing the precast wall height column shown in FIG. 1 including its internal structure, and FIG. 3 is a side view showing the V11 arrow in FIG. 2 in the precast wall height column. 4 is a side view showing the V12 arrow view in FIG. 2 in the precast wall height column.

  The precast wall rail 100 in this embodiment includes a main body 110 made of concrete, an anchor rebar 150 that serves as an anchor for the floor slab 300, and an anchor bolt 160 that serves as an anchor for the adjacent precast wall rail 100. I have.

  The main body 110 has a so-called Florida shape in which concrete is cast on the internal reinforcing bar 111, the lower end portion on the floor slab 300 side projects, and the upper surface 110a-1 of the projecting portion 110a is inclined toward the floor slab 300 side. It is formed. Further, in the vicinity of the lower surface 112 facing the floor slab 300 side in the main body 110, a floor slab insert 113 (horizontal member insert) is embedded in an open state on the lower surface 112. Four slab inserts 113 are embedded in each of a plurality of embedded regions 114 arranged in the longitudinal direction D11 in the vicinity of the lower surface 112.

  The floor slab insert 113 includes a nut portion 113a and a reinforcing bar portion 113b having one end connected to the nut portion 113a. The reinforcing bar 113b of each floor slab insert 113 is connected to the internal reinforcing bar 111 in a locked state with the end 113b-1 opposite to the nut 113a being bent in a U shape.

  The anchor reinforcing bar 150 is a deformed reinforcing bar in which a screw part 151 fitted into the nut 113a of the floor slab insert 113 is formed at one end, and the opposite end 152 serves as an anchor for the floor slab 300. The anchor reinforcing bar 150 is attached to two floor slab inserts 113 selected from the four floor slab inserts 113 in each embedded region 114.

  In addition, a connecting insert 118 is embedded in the vicinity of the first side surface 116 of both side surfaces of the main body 110 in the longitudinal direction D11 so as to open to the first side surface 116. A plurality of the connecting inserts 118 are arranged in a row in the height direction D12 of the main body 110. The connecting insert 118 includes a nut part 118a and a reinforcing bar part 118b having one end connected to the nut part 118a.

  Further, a connecting groove 120 extending in the height direction D12 of the main body 110 is formed on the second side surface 117 of both side surfaces of the main body 110 in the longitudinal direction D11. The connecting groove 120 is a groove fitting 121 embedded in the second side surface 117. In the main body 110, a grooved reinforcing bar 122 having one end connected to the grooved metal 121 is embedded.

  One end of the anchor bolt 160 is coupled to the nut portion 118 a of the coupling insert 118, and the bolt head 161 is fitted into the coupling groove 120 in the main body 110 of the adjacent precast wall rail 100. Then, in the adjacent precast wall rail 100, the non-shrink mortar is filled in the connecting groove 120 as described later, thereby serving as an anchor for the adjacent precast wall rail 100.

  As shown in FIG. 1, in the present embodiment, when the precast wall height column 100 is installed, from the upper surface 123 opposite to the lower surface 112 in the main body 110 to the upper surface 123 of the adjacent precast wall height column 100. And the upper surface connecting bracket 400 are bridged. The upper surface connecting bracket 400 is an adjustment jig for adjusting the height of the upper surface 123 between adjacent precast wall height columns 100. As shown in FIG. 2, an upper surface connection insert 124 to which a bolt 401 for fixing the upper surface connection metal fitting 400 is attached is provided in the vicinity of the upper surface 123 of the main body 110.

  Furthermore, in the present embodiment, the air flow when the non-shrink mortar is filled between the precast wall rail 100 and the floor slab 300 as will be described later from the upper surface 110a-1 to the lower surface 112 of the overhanging portion 110a in the main body 110. Air vent holes 125 are provided as escape routes. The air vent hole 125 is a tapered through hole that tapers from the lower surface 112 toward the upper surface 110a-1 of the protruding portion 110a. In the main body 110, the air vent holes 125 are provided between the plurality of embedded regions 114 in a plan view from the upper surface 123.

  Next, a handrail installation structure in which the precast wall handrail 100 described above is installed on the floor slab 300 will be described.

  FIG. 5 is a diagram schematically showing the internal structure of the bridge shown in FIG. 1 in the cross section taken along the line V13-V13 passing through the anchor slab for floor slab in FIG. FIG. 6 is a diagram schematically showing an internal structure of the bridge shown in FIG. 1 in a cross section taken along line V14-V14 passing through the air vent hole in FIG.

  In the handrail installation structure 2 (vertical member installation structure) employed in the bridge 1 of this embodiment, the anchor rebar 150 is attached to the nut portion 113a of the floor slab insert 113 in the precast wall handrail 100, and the floor slab insert A reinforcing bar portion 113 b of 113 is connected to the internal reinforcing bar 111. An anchor hole 302 into which an end 152 of the anchor reinforcing bar 150 opposite to the floor slab insert 113 is inserted is formed in the removal portion 301 of the existing wall rail 200 on the upper surface 300a of the floor slab 300. . The anchor hole 302 is filled with a cement material 303 between the inner surface thereof and the inserted anchor reinforcing bar 150.

  Moreover, between the railing side area | region 112a (vertical member side area | region) in the lower surface 112 of the precast wall railing 100, and the floor slab side area | region 301a (horizontal member side area | region) in said removal location 301 of the floor slab 300, Adhesive resin 501 is sandwiched. The railing area 112 a is an area surrounding the opening of the floor slab insert 113. The handrail side area 112 a corresponds to a surface portion of the embedding area 114 of the floor slab insert 113 in the vicinity of the lower surface 112 of the precast wall handrail 100. The floor slab side region 301a is a region that surrounds the opening of the anchor hole 302 and faces the railing side region 112a.

  FIG. 7 is a view showing a top view of the bridge shown in FIG. 1 when viewed from an arrow V16 in the drawing together with an adhesive resin or the like sandwiched between the railing area and the floor slab area. . In FIG. 7, the top connection fitting 400 is not shown so that the connection portion between the adjacent precast wall height columns 100 can be seen.

  In this embodiment, between the lower surface 112 of the precast wall rail 100 and the above-described removal portion 301 on the upper surface 300a of the floor slab 300, an annular shape is formed along the outer edges of the rail side region 112a and the floor slab side region 301a. The adhesive resin packing 502 is sandwiched. The adhesive resin 501 is filled inside the adhesive resin packing 502. The adhesive resin packing 502 is formed of a sponge-based resin, and an epoxy resin is employed as an example of the adhesive resin 501.

  A pair of linear mortar resin packings 503 is provided along a pair of opposing edges 112b extending in the longitudinal direction D11 on the lower surface 112 of the precast wall rail 100. The pair of resin packings for mortar 503 are provided across a plurality of precast wall height columns 100 arranged in the longitudinal direction D11. The non-shrinkable mortar 504 is filled in a region outside the adhesive resin packing 502 between the pair of mortar resin packings 503.

  And as above-mentioned and as FIG. 6 shows, the air vent hole 125 is provided from the upper surface 110a-1 of the overhang | projection part 110a of the precast wall rail 100 to the lower surface 112. As shown in FIG. The air vent hole 125 becomes an air escape path when the non-shrink mortar 504 is filled in the above-described region between the packings.

  Also, a mortar resin packing 503 is sandwiched between adjacent precast wall rails 100. The resin packing 503 for mortar here is provided in a pair so as to extend in the height direction D12 and face the thickness direction D13. The non-shrink mortar 504 is filled between the anchor bolt 160 of one precast wall rail 100 and the connecting groove 120 of the other precast wall rail 100 and between the pair of mortar resin packings 503. ing.

  Here, in this embodiment, the groove fitting 121 that forms the connecting groove 120 has a shape in which an edge protrudes inward on the opening side. The overhanging portion plays a role of resisting a force in a direction in which the anchor bolt 160 and the non-shrink mortar 504 are to be extracted from the connecting groove 120.

  Further, in the present embodiment, as shown in FIGS. 5 and 6, the fiber net 126 is provided along the outer surface in the vicinity of the outer surface facing the outside of the bridge 1 in the main body 110 of the precast wall rail 100. Buried. The fiber net 126 is provided to prevent the external concrete from peeling off, and is not specified here, but is formed of fibers such as glass fiber, aramid fiber, and carbon fiber.

  Next, a rail installation method (vertical member installation method) in which the precast wall rail 100 is installed on the floor slab 300 using the rail installation structure 2 described above will be described.

  First, a portion to be repaired of the existing wall height column 200 in the bridge 1 is removed by a cutter.

  Next, the linear mortar resin shown in FIG. 7 extends over the entire length corresponding to all of the plurality of precast wall height columns 100 to be installed at the removal portion 301 of the existing wall height column 200 extending in a strip shape. A pair of packings 503 are provided. The pair of resin packings for mortar 503 are provided at positions corresponding to the pair of opposed edges 112b of the lower surface 112 of the precast wall rail 100 at the removal location 301 described above.

  Thereafter, an anchor reinforcing bar attaching step and an anchor bolt attaching step are performed on the precast wall rail 100, and an anchor hole installing step is performed on the floor slab 300. And the railing installation process (vertical member installation process) which installs the precast wall rail 100 in the removal location 301 of the existing wall rail 200 in the upper surface 300a of the floor slab 300 is performed.

  FIG. 8 is a schematic diagram for explaining the anchor reinforcing bar attaching step, the anchor hole installing step, and the handrail installing step, and FIG. 9 is a schematic diagram for explaining the anchor bolt attaching step and the handrail installing step. .

  In the anchor reinforcing bar attaching step, as shown in FIG. 8, the anchor reinforcing bar 150 is attached to the floor slab insert 113 in the main body 110 of the precast wall rail 100 by fitting the screw part 151 into the nut part 113a. . At this time, the anchor reinforcing bars 150 are attached to the two floor slab inserts 113 selected from the four floor slab inserts 113 for each of the embedded regions 114 shown in FIGS. 2 and 7.

  In each embedded region 114, a total of four floor slab inserts 113 are provided so that the longitudinal direction D11 × thickness direction D13 is 2 × 2. In the present embodiment, one of the floor slab inserts 113 is selected from the two rows in the longitudinal direction D11 and the anchor reinforcing bar 150 is attached. The selection of the floor slab insert 113 at this time is appropriately performed according to the position of the anchor hole 302 provided in the floor slab 300 in the anchor hole installation step.

  In the anchor bolt attaching step, as shown in FIG. 9, the anchor bolt 160 is attached to the connecting insert 118 in the main body 110 of the precast wall rail 100 by fitting the threaded portion into the nut portion 118a.

  In the anchor hole installation step, as shown in FIG. 8, the end 152 of the anchor rebar 150 opposite to the threaded portion 151 is inserted into the removal portion 301 of the existing wall rail 200 in the floor slab 300. Anchor hole 302 is drilled. Further, the anchor hole 302 is filled with a cement material 303. As this cement material 303, for example, a cement force anchor, which is an inorganic injection type anchor manufactured by Sumitomo Osaka Cement Co., Ltd., can be employed as an example.

  In the rail installation process, first, an annular adhesive resin packing 502 is placed on the floor slab along the outer edge of the floor slab side region 301a at the removal portion 301 sandwiched between the upper surface 300a of the floor slab 300 and the pair of mortar resin packings 503. 300 is disposed on the upper surface 300a. Then, the adhesive resin 501 is filled inside the adhesive resin packing 502.

  Next, as shown in FIG. 9, a pair of mortar resin packings 503 are provided on the second side surface 117 in which the connecting groove 120 is provided in the adjacent precast wall rail 100 already installed. The pair of resin packings for mortar 503 are provided along a pair of opposing edges in the thickness direction D13 on the second side surface 117.

  In the railing installation step, the precast wall railing 100 is placed on the floor slab 300 from above. At this time, the anchor reinforcing bar 150 is inserted into the anchor hole 302, and the bolt head 161 of the anchor bolt 160 is fitted into the connecting groove 120 of the adjacent precast wall rail 100. Further, the precast wall height column 100 is slowly lowered so that the bolt head 161 does not hit the groove fitting 121 forming the connecting groove 120.

  Here, in the railing installation step, the height is adjusted so that the upper surface 123 of the precast wall rail 100 placed on the floor slab 300 is substantially flush with the upper surface 123 of the adjacent precast wall rail 100 already installed. The

  FIG. 10 is a diagram illustrating a state in which the heights of the upper surfaces of adjacent precast wall rails are approximately flush with each other in the rail installation step.

  In the handrail installation step, first, the precast wall handrail 100 is installed from above with wedge-shaped plastic spacers 601 disposed at three positions between the upper surface 300a of the floor slab 300.

  FIG. 11 is a view showing a plastic spacer used in the rail installation process.

  As shown in FIG. 11, in the rail installation process, a plurality of plastic spacers 601 having a wedge shape with different inclination angles and sizes are prepared. In the present embodiment, the existing wall rail 200 is removed for repair, and the precast wall rail 100 is newly installed at the removed portion 301. In this case, the precast wall rail 100 is installed on an uneven installation surface after removal.

  In order to install the precast wall rail 100 horizontally on such an uneven installation surface, three are appropriately selected from a plurality of plastic spacers 601, and the level is adjusted. These three plastic spacers 601 are arranged at the following positions. First, on the second side surface 117 side that becomes the open side when the precast wall rail 100 is newly installed, one plastic spacer 601 is disposed in the vicinity of both ends in the thickness direction D13. On the other hand, about the 1st side surface 116 side to which the upper surface 123 is connected with the upper surface 123 of the adjacent precast wall rail 100 with the upper surface connection metal fitting 400, in the vicinity of the edge part away from the connection side by the upper surface connection metal fitting 400 about the thickness direction D13. One plastic spacer 601 is disposed. In addition, when the plastic spacer 601 is disposed at this position, the upper surface connection fitting 400 is also attached. The upper surface connecting bracket 400 is bridged from the upper surface 123 of the main body 110 to the upper surface 123 of the adjacent precast wall height column 100 and is fixed with bolts 401 so as to connect the two upper surfaces 123 to each other. The adjustment of the level is performed by shifting the position of the plastic spacer 601 or exchanging it with another one.

  In the rail installation process, the precast wall rails 100 are installed such that the top surfaces 123 of adjacent precast wall rails 100 are substantially flush with each other. And after this, the non-shrink mortar is filled in various places.

  FIG. 12 is a schematic diagram showing how non-shrink mortar is filled in the railing installation process.

  As described above, when the precast wall rail 100 is installed, a gap is opened between the precast wall rail 100 and the floor slab 300 between the adhesive resin packing 502 and the mortar resin packing 503 described above. Yes. In the rail installation process, the filling nozzle 701 of the non-shrink mortar 504 is inserted into this gap. Since the mortar resin packing 503 is formed of a sponge-based resin, the filling nozzle 701 is inserted while being deformed so as to push away the mortar resin packing 503. The non-shrink mortar 504 is filled in the gap through the filling nozzle 701. At the time of filling, the air in the gap is released from the air vent hole 125.

  With such filling, as shown in FIG. 7, between the adjacent precast wall height columns 100, the anchor bolt 160 of one precast wall height column 100, and the connecting groove 120 of the other precast wall height column 100, The non-shrink mortar 504 is also filled in between. At the time of filling, the upper surface connection fitting 400 that closes the connection groove 120 is temporarily removed. When the filling is completed, the upper surface connecting bracket 400 is attached again. In this state, the non-shrinkable mortar 504 is cured and solidified, and the upper surface connecting bracket 400 and the three plastic spacers 601 are removed when the non-shrinkable mortar 504 is solidified to some extent. This completes the handrail installation process (that is, the handrail installation method). When a new precast wall rail 100 is subsequently installed, the rail rail installation method described above is repeated.

  In the handrail installation structure 2, handrail installation method, and precast wall handrail 100 of the present embodiment described above, the precast wall handrail 100 is separate from the anchor rebar 150 serving as an anchor for the floor slab 300. It has. This makes it possible to construct the precast wall rail 100 by separately transporting the main body 110 and the anchor rebar 150 to the site, and easily realizing the prevention of bending of the anchor rebar 150 during transportation. Can do. Moreover, the anchor rebar 150 can be easily attached on site by being fitted into the floor slab insert 113 of the main body 110. Also for the floor slab 300, it is only necessary to fill the cement material 303 by drilling the anchor holes 302. Thus, according to the handrail installation structure 2, handrail installation method, and precast wall handrail 100 of this embodiment, the precast wall handrail 100 can be easily installed on the floor slab 300.

  Here, in this embodiment, the adhesive resin 501 is sandwiched between the rail-side region 112a on the lower surface 112 of the precast wall rail 100 and the floor-slab region 301a on the upper surface 300a of the floor slab 300. By this adhesive resin 501, the installation strength of the precast wall rail 100 can be increased.

  Further, in the present embodiment, the adhesive resin 501 is filled inside the adhesive resin packing 502 sandwiched between the lower surface 112 of the precast wall rail 100 and the upper surface 300a of the floor slab 300, and on the outer side of the adhesive resin packing 502. Is filled with non-shrink mortar 504. Thereby, since the usage-amount of the adhesive resin 501 which tends to be expensive can be suppressed, the construction cost can be reduced. Moreover, since the flow of the adhesive resin 501 before curing can be suppressed by using the adhesive resin packing 502, the precast wall rail 100 can be more easily installed while reducing the construction cost as described above. it can. Further, the non-shrink mortar 504 outside the adhesive resin packing 502 can further increase the installation strength of the precast wall rail 100.

  In the present embodiment, four floor slab inserts 113 are embedded in each of the plurality of embedded regions 114 arranged in the longitudinal direction D11. Thereby, first, the reinforcement | strengthening of the installation strength of the precast wall rail 100 is achieved. From among the embedded floor slab inserts 113, the one used for installing the precast wall rail 100 can be selected based on the position of the anchor hole 302 determined by the structure of the floor slab 300, for example. Yes. For this reason, the precast wall rail 100 can be more easily installed on the floor slab 300.

  In the present embodiment, the floor slab insert 113 includes a nut portion 113a into which the screw portion 151 of the anchor reinforcing bar 150 is fitted, and a reinforcing bar portion 113b having one end connected to the nut portion 113a. Thereby, the further strengthening of the installation strength of the precast wall rail 100 is achieved.

  Further, in this embodiment, the reinforcing bar portion 113 b of the floor slab insert 113 has an end portion 113 b-1 on the opposite side to the nut portion 113 a side connected to the internal reinforcing bar 111 of the main body portion 110. Thereby, since the embedding strength of the floor slab insert 113 is further enhanced by the connection of the reinforcing bar portion 113b to the internal reinforcing bar 111, the installation strength of the precast wall rail 100 can be further increased.

  Further, in the present embodiment, the anchor bolt 160 used for connecting the adjacent precast wall rails 100 can be transported to the site separately from the main body 110, so that the anchor bolt 160 can be prevented from being bent during transportation. Can be easily realized. Further, the anchor bolt 160 can be easily attached on site by being fitted into the connecting insert 118 of the main body 110. Thus, according to this embodiment, the precast wall rail 100 can be more easily installed on the floor slab 300 from the viewpoint of connection between adjacent precast wall rails 100.

  In the present embodiment, the connecting insert 118 includes a nut portion 118a into which one end of the anchor bolt 160 is fitted, and a reinforcing bar portion 118b in which one end is connected to the nut portion 118a. Thereby, since intensity | strength is also strengthened also about the insert 118 for connection, high connection intensity | strength can be obtained also about the adjacent precast wall rails 100. FIG.

  In the present embodiment, the connecting groove 120 is a groove fitting 121 embedded in the second side surface 117 of the main body 110. Thereby, since the intensity | strength is also strengthened also about the groove | channel 120 for connection, higher connection intensity | strength can be obtained about the adjacent precast wall rails 100. FIG.

  In the present embodiment, the main body 110 is embedded with a grooved reinforcing bar 122 having one end connected to the grooved metal 121. Since the strength of the connection groove 120 is further enhanced by the groove reinforcing bar 122, it is possible to obtain a higher connection strength between the adjacent precast wall rails 100.

  In the handrail installation method according to the present embodiment, the horizontal degree of the main body 110 is adjusted by arranging the plastic spacers 601 at three places in the handrail installation process. Further, the heights of the two upper surfaces 123 are matched by using an upper surface connection fitting 400 that extends from the upper surface 123 of the main body 110 to the adjacent upper surface 123 and connects the two upper surfaces 123 to each other. As a result, even if there are irregularities associated with the removal of the existing wall height column 200 on the installation surface of the precast wall height column 100, the height positions of the upper surfaces 123 are aligned between adjacent precast wall height columns 100, and with high horizontality. Can be installed. Thereby, while being able to obtain high installation strength, a good appearance after installation can be obtained.

  Next, the modification with respect to the handrail installation structure 2 in this embodiment is demonstrated. In this modified example, the peripheral structure of the floor slab insert 113 is different from that of the present embodiment. Hereinafter, a modification will be described by paying attention to this difference.

  FIG. 13: is a fragmentary perspective view which pays attention to the periphery structure of the insert for floor slabs in the precast wall rail for the railing installation structure of a modification. Moreover, FIG. 14 is a figure which shows typically the internal structure in the V81-V81 line cross section which passes through the anchor reinforcing bar for floor slabs in FIG. In FIGS. 13 and 14, the same reference numerals as those in FIGS. 1 to 12 are assigned to the same components as those of the handrail installation structure 2 described with reference to FIGS. 1 to 12. In the following, redundant description of these equivalent components is omitted.

  Also in the handrail installation structure 9 in the bridge 8 of the modified example, the floor slab insert 913 includes a nut part 913a into which the anchor reinforcing bar 150 is fitted, and a reinforcing bar part 913b having one end connected to the nut part 913a. However, in this modification, the reinforcing bar portion 913 a of the floor slab insert 913 is not connected to the internal reinforcing bar 111 of the main body portion 910. In this modification, the reinforcing bar portion 913a is connected by welding to a rectangular plate-shaped insert fitting 916 that is embedded substantially in parallel with the lower surface 912 of the main body portion 910.

  It goes without saying that the precast wall rail 900 can be easily installed on the floor slab 300 also in the railing installation structure 9 of this modified example, similarly to the railing installation structure 2 of the above-described embodiment. Moreover, in this modification, since the embedding strength of the reinforcing bar portion 913a of the floor slab insert 913 is strengthened by the connection to the insert metal fitting 916, the installation strength of the precast wall rail 900 is increased. Yes. However, in the handrail installation structure 2 of the above-described embodiment, the embedding strength of the reinforcing bar portion 113b of the floor slab insert 113 is enhanced by using the internal reinforcing bar 111, which is advantageous in terms of manufacturing cost.

  The above-described embodiments and modifications are merely representative examples of the present invention, and the present invention is not limited to these embodiments and modifications. That is, those skilled in the art can implement various modifications in accordance with conventionally known knowledge without departing from the scope of the present invention. Of course, such modifications are included in the scope of the present invention as long as the vertical member installation structure, the vertical member installation method, and the precast vertical member configuration of the present invention are included.

  For example, in the above-described embodiments and modifications, the handrail installation structures 2 and 9 employed in the bridges 1 and 8 are examples of the vertical member installation structure, the vertical member installation method, and the precast vertical member according to the present invention. The railing installation method and the precast wall railings 100 and 900 are illustrated. However, the vertical member installation structure, the vertical member installation method, and the precast vertical member referred to in the present invention are not limited to these. For example, the installation structure, the installation method, and the installation method for installing the precast vertical wall on the floor plate of the building It may be a precast vertical wall or the like. That is, the vertical member installation structure, the vertical member installation method, and the precast vertical member referred to in the present invention generally ask the specific member configuration and the like as long as the precast vertical member is installed on the horizontal member. is not.

  Further, in the above-described embodiments and modifications, as an example of the vertical member installation structure, the vertical member installation method, and the precast vertical member according to the present invention, the handrail installation for repairing the existing bridges 1 and 8 is applied. Structures 2 and 9, rail installation methods, and precast wall rails 100 and 900 are illustrated. However, the vertical member installation structure, the vertical member installation method, and the precast vertical member according to the present invention are not limited to these. For example, an installation structure, an installation method, a precast vertical member, and the like for a case where a horizontal member is made in-situ at the time of newly installing a structure and a vertical member is made of precast may be used. That is, the vertical member installation structure, the vertical member installation method, and the precast vertical member according to the present invention do not ask whether the application target is existing or new.

  Moreover, in embodiment mentioned above and the modification, what is called Florida type precast wall height column 100,900 is illustrated as an example of the precast vertical member said to this invention. However, the precast vertical member referred to in the present invention is not limited to the Florida type, and can be set to an arbitrary shape.

  Moreover, in embodiment and the modification which were mentioned above, the following floor slab insert 113 and the anchor reinforcement 150 are illustrated as an example of the insert for horizontal members and the anchor reinforcement mentioned in the present invention. That is, there are illustrated floor slab inserts 113 embedded in each of the embedded regions 114 and anchor reinforcing bars 150 attached to two floor slab inserts 113 selected from the four floor slab inserts 113. . However, the horizontal member insert and the anchor reinforcing bar referred to in the present invention are not limited to this, and may be a form in which the anchor reinforcing bar is attached to all of the horizontal member inserts embedded in each embedded region. Further, the number of horizontal member inserts embedded in the embedded region is not limited to four, and may be another number. Alternatively, horizontal member inserts and anchor reinforcing bars may be provided one by one for one precast vertical member. However, by providing a plurality of embedding areas and embedding a plurality of horizontal member inserts in each embedding area, the installation strength of the precast vertical members can be increased and the installation of the precast vertical members can be facilitated. Is as described above.

  Further, in the above-described embodiments and modifications, as an example of the adhesive resin referred to in the present invention, the inside of the adhesive resin packing 502 sandwiched between the lower surface 112 of the precast wall rail 100 and the upper surface 300a of the floor slab is filled. An example of the adhesive resin 501 is shown. However, the adhesive resin referred to in the present invention is not limited to this. For example, the adhesive resin is sandwiched over substantially the entire surface between the lower surface of the precast vertical member and the portion of the upper surface of the horizontal member facing the lower surface. May be. However, by providing the adhesive resin 501 only on the inner side of the adhesive resin packing 502, the construction cost can be reduced by suppressing the amount of the adhesive resin used, and the installation can be facilitated by suppressing the flow of the adhesive resin during construction. The points that can be achieved are as described above.

1,8 Bridge 2,9 Handrail installation structure (vertical member installation structure)
100,900 Precast wall rail (precast vertical member)
110,910 Main body 110a Overhang portion 110a-1 Upper surface 111 Internal rebar 112,912 Lower surface 112a Rail side region (vertical member side region)
113 Floor slab insert (horizontal member insert)
113a, 118a Nut portion 113b, 118b Reinforcing bar portion 113b-1 End portion 114 Embedding region 116 First side surface 117 Second side surface 118 Connecting insert 120 Connecting groove 121 Groove fitting 122 Groove reinforcing rod 123 Upper surface 124 Upper surface connecting insert 125 Air vent Hole 150 Anchor rebar 151 Screw part 152 Other end 160 Anchor bolt 161 Bolt head 200 Existing wall rail 300 Floor slab (horizontal member)
300a Upper surface 301 Removal location 301a Floor slab side area (horizontal member side area)
302 Anchor hole 303 Cement material 400 Upper surface connection fitting 401 Bolt 501 Adhesive resin 502 Adhesive resin packing 503 Mortar resin packing 504 Non-shrink mortar 601 Plastic spacer 701 Filling nozzle D11 Longitudinal direction D12 Height direction D13 Thickness direction

Claims (10)

A vertical member installation structure in which a precast vertical member is installed along the longitudinal direction on a horizontal member extending in a predetermined longitudinal direction,
The precast vertical member is
Made of concrete, in the vicinity of the lower surface facing the horizontal member side, a main body portion in which a horizontal member insert is embedded in an open state on the lower surface;
A threaded portion that is fitted into the horizontal member insert is formed at one end, and the other end includes an anchor reinforcing bar that serves as an anchor for the horizontal member,
The vertical member installation is characterized in that an upper surface of the horizontal member facing the precast vertical member side is provided with an anchor hole into which the other end of the anchor reinforcing bar is inserted and filled with a cement material. Construction.   A vertical member side region surrounding at least the opening of the horizontal member insert on the lower surface of the precast vertical member, and a surface facing the vertical member side region surrounding at least the opening of the anchor hole on the upper surface of the horizontal member. The vertical member installation structure according to claim 1, wherein an adhesive resin is sandwiched between the horizontal member side region and the horizontal member side region.   Between the lower surface of the precast vertical member and the upper surface of the horizontal member, an annular resin packing is sandwiched along the outer edge of the vertical member side region and the horizontal member side region, The vertical member installation structure according to claim 2, wherein the adhesive resin is filled inside the resin packing, and a non-shrink mortar is filled outside the resin packing. Each of the precast vertical members extends in the longitudinal direction and is arranged in a plurality along the longitudinal direction.
A connecting insert is embedded in the vicinity of the first side surface of the main body portion of the precast vertical member in the vicinity of the first side surface in an open state on the first side surface, and the main body is disposed on the second side surface. The connecting groove extending in the height direction of the part is formed,
One end is connected to the connecting insert, a bolt head is fitted into the connecting groove in the main body of the adjacent precast vertical member, and the connecting groove is filled with non-shrink mortar. The vertical member installation structure according to any one of claims 1 to 3, wherein the precast vertical member further includes an anchor bolt that serves as an anchor for the precast vertical member. A vertical member installation method for installing a precast vertical member along the longitudinal direction on a horizontal member extending in a predetermined longitudinal direction,
The precast vertical member is made of concrete, and in the vicinity of the lower surface facing the horizontal member side, a main body portion in which a horizontal member insert is embedded in an open state on the lower surface, and one end is fitted into the horizontal member insert. A threaded portion is formed, and the other end includes an anchor reinforcing bar that serves as an anchor for the horizontal member,
An anchor reinforcing bar attaching step of attaching the anchor reinforcing bar to the horizontal member insert in the main body of the precast vertical member;
An anchor hole installation step of drilling an anchor hole into which the other end of the anchor rebar is inserted, and filling the anchor hole with a cement material on an upper surface of the horizontal member facing the precast vertical member side;
A vertical member installation step of installing the precast vertical member on the upper surface of the horizontal member so as to insert the opposite end of the anchor reinforcing bar into the anchor hole of the horizontal member; The vertical member installation method characterized.   The vertical member installation step is a step of applying an adhesive resin to a horizontal member side region surrounding at least the opening of the anchor hole on the upper surface of the horizontal member, and installing the precast vertical member on the upper surface of the horizontal member. The vertical member installation method according to claim 5, wherein:   In the vertical member installation step, an annular resin packing is disposed on the upper surface of the horizontal member along the outer edge of the horizontal member side region, and an adhesive resin is filled inside the resin packing, and the precast vertical member The vertical member installation method according to claim 6, which is a step of filling the non-shrink mortar on the outside of the resin packing after the installation. The precast vertical member extends in the longitudinal direction;
The vertical member installation step is a step of installing a plurality of the precast vertical members arranged along the longitudinal direction of the horizontal member,
A connecting insert is embedded in the vicinity of the first side surface of the main body portion of the precast vertical member in the vicinity of the first side surface in an open state on the first side surface, and the main body is disposed on the second side surface. A connecting groove extending in the height direction of the part is formed, and the precast vertical member further includes an anchor bolt serving as an anchor for the adjacent precast vertical member,
In the vertical member installation step, one end of the anchor bolt is attached to the connection insert, and the bolt head of the anchor bolt is fitted into the connection groove in the main body portion of the adjacent precast vertical member. The vertical member installation method according to any one of claims 5 to 7, wherein the precast vertical member is installed in a non-shrink mortar in the connecting groove. .   The vertical member installation step adjusts the level of the main body by arranging spacers at a plurality of locations between the lower surface of the main body and the upper surface of the horizontal member. The precast is made by adjusting the height of the two upper surfaces by using an upper surface connecting bracket that is bridged from the upper surface opposite to the lower surface to the upper surface of the adjacent precast vertical member and connects the two upper surfaces to each other. The vertical member installation method according to claim 8, wherein the vertical member installation step is a step of installing a manufactured vertical member. A precast vertical member installed along the longitudinal direction on a horizontal member extending in a predetermined longitudinal direction,
Made of concrete, in the vicinity of the lower surface facing the horizontal member side, a main body portion in which a horizontal member insert is embedded in an open state on the lower surface;
A precast vertical member comprising: a threaded portion that is fitted into the horizontal member insert at one end, and an anchor reinforcing bar that serves as an anchor for the horizontal member at the other end.

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