JP2019082081A - L-shaped structure for wall - Google Patents

Abstract

To provide an L-shaped structure for wall capable of facilitating the weight saving while maintaining flexural rigidity, and reducing the load to a skeleton.SOLUTION: A main body of an L-shaped structure for wall 100 is provided with a first hollow box-shaped structure 100H extending in a second direction Y intersecting a first direction X, and a second hollow box-shaped structure 100 V extending in a third direction Z intersecting the first direction X and the second direction Y. The first box-shaped structure is provided with a contacting face plate 300 on which a mounting hole is formed, and a mounting part 200 extending in the second direction Y from the opposite side to a mounting surface of the contacting face plate 300. The mounting part 200 includes a recess which is recessed in the third direction Z from the outer side toward the inner side, and the mounting hole is continuous in the second direction Y and communicates to the inside of the recess.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an L-shaped wall structure.

  For example, there are wall structures for building walls along railway tracks, roads, etc. to block noise from vehicles etc. As the wall structure, there are the techniques described in Patent Documents 1 and 2. Patent Document 1 discloses a wall structure in which a panel is disposed between grooved columns erected at a predetermined interval, and each end of the panel is inserted between opposing flanges of each grooved column. Is disclosed. Patent Document 2 discloses a wall structure made of FRP (Fiber-Reinforced Plastics), which is arranged along a track direction on a ground covering portion at a tip end of a protruding portion of a high-crosslinked frame.

JP, 2000-257027, A Patent 4709305 specification

  In patent document 1, there were many structural members for fixing a panel with respect to a support | pillar, and the effort in the field construction took time. Further, in the technology of Patent Document 1, since the bolt for fixing the panel to the support is exposed at the upper side of the elevated bridge, the bolt may be corroded. In addition, since the wall structure is fixed to the projecting portion, it is considered to reduce the load applied to the projecting portion.

  An object of the present invention is to provide an L-shaped wall structure which can be reduced in weight while maintaining its bending rigidity and can reduce the load applied to a housing.

  The present invention is an L-shaped wall structure including a main body forming an L shape when viewed from a first direction, wherein the main body is a hollow first box extending in a second direction intersecting the first direction. And a hollow second box-shaped structure extending in a third direction intersecting the first direction and the second direction, the L-shaped structure being formed by the one box-shaped structure and the second box-shaped structure The first box-shaped structure constitutes a mounting surface arranged to face the housing, and from the side opposite to the mounting surface of the contact surface plate on which the mounting hole is formed, and the contact surface plate A mounting portion extending in a second direction, the mounting portion including a recess recessed from the outside to the inside in the third direction, the mounting hole being continuous in the second direction and communicating to the inside of the recess It is done.

  The L-shaped wall structure has a hollow box-like structure, so that weight reduction can be achieved. In addition, since the main body of the L-shaped wall structure is L-shaped, the contact face plate of the first box-shaped structure extending in the second direction can be fixed to the beam or column of the frame. it can. Therefore, since the L-shaped wall structure can be installed on the housing without being fixed to the projecting portion (projected portion), the load acting on the housing can be reduced. Further, in the mounting portion, since the mounting hole is communicated to the concave portion, the installation tool can be inserted inside the concave portion, and the fastening operation of the fixing nut can be performed from the outer surface side. This can improve the workability. Moreover, looseness of a fixing nut can be eliminated by visually recognizing from the outer surface side. In addition, since a hollow box-shaped structure is adopted, weight reduction can be achieved while maintaining bending rigidity.

  Further, the mounting portion has a thickness direction as the first direction, a pair of mounting portion side plates separated in the first direction, a thickness direction as the third direction, and the pair of mounting portion side plates connected to each other. In the third direction, the side opposite to the mounting top plate may be open to the outside.

  Further, the attachment portion includes an attachment portion seat plate facing the contact face plate in the second direction and in which the attachment hole is formed, and the attachment portion seat is provided between the contact face plate and the attachment portion seat plate. A configuration may be employed in which a cylindrical sheath that extends in the second direction and that constitutes the mounting hole is disposed. In this configuration, since the sheath tube is provided, it is possible to receive a clamping compression force at the time of fixation. Therefore, the nut can be tightened firmly.

  In the first box-shaped structure, the thickness direction is the third direction, and the first face plate extending in the second direction and the thickness direction are the third direction, and extend in the second direction. And the second plane plate facing the first plane plate in the third direction.

  The distance between the first face plate and the second face plate in the third direction may be shorter as the distance from the contact face plate in the second direction is increased. In this configuration, since the length in the third direction decreases as the overhanging length in the second direction increases, weight reduction can be achieved while receiving bending stress acting on the L-shaped wall structure. it can.

  In the second box-shaped structure, the thickness direction is the second direction, the third face plate extending in the third direction, and the thickness direction is the second direction, and extends in the third direction. And a fourth face plate facing the third face plate in the second direction.

  In addition, the main body includes a plurality of included ribs that form an L shape when viewed from the first direction, and the plurality of included ribs are disposed apart from each other in the first direction. The inner rib is formed continuously to a two-box structure, and the inner rib is a web having the thickness direction as the first direction, and a pair of flanges extending in the first direction from both ends in the width direction of the web. In the first box-shaped structure, the first flange is joined to the first face plate, and the second flange is joined to the second face plate, and the second flange has a first flange and a second flange. In the box-shaped structure, the first flange may be joined to the third face plate, and the second flange may be joined to the fourth face plate. In this configuration, since the inner rib is provided, the bending rigidity and the bending strength can be improved.

  Further, the second box-shaped structure includes an inclusion box arranged in the first direction in correspondence with the position of the attachment portion, and the inclusion box has a thickness direction as the first direction, A pair of box side plates spaced apart in a first direction, and a box top plate having a thickness direction as the second direction, the box top plate being in contact with the third face plate between the pair of box side plates; In the first direction, the inner box and the mounting portion may be interposed, and the web may be bonded to the box side plate and to the mounting portion side plate. In this configuration, it is possible to include an inclusion box, and integrate the inclusion rib and the attachment part while integrating the inclusion rib and the inclusion box by sandwiching the inclusion box and the side surface of the attachment part. Thereby, the stress which acts by the bending force of a wind load can be suitably distributed via an inclusion rib. As a result, it is possible to prevent sideways buckling of the internal rib.

  In the corner between the second face plate and the attachment side plate, the web has a first relief portion which is a concave shape that forms a gap between the second face plate and the attachment side plate, the third face plate and the box side plate And a second relief portion that is a concave shape that forms a gap with the box side plate. In this configuration, since the web of the inner rib is provided with a recessed shape, the inner rib is prevented from running on the R portion of the corner between the attachment side plate and the bottom plate. Since the contact between the web and the R portion is avoided, the bonding strength between the flange and the bottom plate can be improved. Similarly, the internal rib is prevented from riding on the corner R of the box side plate and the back plate. Since the contact between the web and the R portion is avoided, the bonding strength between the flange and the bottom plate can be improved.

  Further, the main body is preferably made of FRP. Thereby, weight reduction can be further achieved while maintaining the bending rigidity.

  Further, the second box-shaped structure may be provided with a bracket that protrudes outward in the second direction, and the bracket may be provided with a position adjustment unit capable of adjusting the position of the main body in the third direction. In this configuration, the position of the main body in the third direction can be adjusted.

  In addition, a closing member is disposed to cover a gap between the adjacent main bodies in the first direction, the closing member extends in the vertical direction which is the third direction, and It may be configured to include a first closing plate that covers from two directions, and a second closing plate that is bent in the second direction from the first closing plate and that abuts on the top plate of the second box-shaped structure. In this configuration, by blocking the gap between the main bodies adjacent in the first direction, it is possible to prevent the running noise from leaking from the gap.

  The thickness direction of the contact surface plate may be the second direction, and the contact surface plate may be disposed to face the side surface of the housing.

  According to the present invention, it is possible to reduce the weight while maintaining the bending rigidity, and to provide an L-shaped wall structure capable of reducing the load applied to the housing.

It is a perspective view which shows the state in which the structure for L-shaped wall which concerns on embodiment was installed in the viaduct. It is a perspective view which shows the structure for L-shaped wall which concerns on embodiment. It is a perspective view which shows the inclusion rib arrange | positioned inside the structure for L-shaped wall. It is a partially cutaway perspective view which shows the inclusion box arrange | positioned inside the structure for L-shaped wall. It is a partially cutaway perspective view which shows the structure for L-shaped wall in the state before arrange | positioning an inclusion rib. It is a partially cutaway perspective view which shows the structure for L-shaped wall in the state after arrange | positioning an inclusion rib. It is a partially cutaway perspective view which shows the structure of the horizontal part of the structure for L-shaped wall. FIG. 8A is a cross-sectional view of a plane orthogonal to the second direction in the horizontal portion of the L-shaped wall structure. FIG. 8 (b) is a partially enlarged view of FIG. 8 (a). FIG. 9A is a cross-sectional view of a plane orthogonal to the third direction in the vertical portion of the L-shaped wall structure. FIG.9 (b) is the elements on larger scale of Fig.9 (a). It is sectional drawing of the surface orthogonal to the 1st direction of the horizontal part of the structure for L-shaped wall. It is a bottom view which shows the horizontal part of the structure for L-shaped wall from a downward direction. It is sectional drawing which shows the state which installed the bracket in the structure for L-shaped wall, and is sectional drawing of the surface orthogonal to a 1st direction. It is a perspective view which shows the structure for L-shaped wall in the state which installed the bracket. It is sectional drawing which shows the state which installed the clearance gap plate and the apron in the structure for L-shaped wall, and is sectional drawing of the surface orthogonal to a 1st direction. FIG. 15 (a) is a partial cutaway perspective view showing the gap plate. FIG.15 (b) is sectional drawing which shows the cross section cut along the AA of FIG. 15 (a). FIG.15 (c) is sectional drawing which shows the cross section cut along the BB line of Fig.15 (a). It is a perspective view which shows the structure for L-shaped wall in the state which arrange | positioned the clearance gap plate. It is a partially cutaway perspective view which shows the structure for L-shaped wall in the state which has arrange | positioned the horizontal rib. It is a perspective view which shows the joining state of the inclusion box arrange | positioned inside the structure for L-shaped wall.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same parts or corresponding parts are denoted by the same reference numerals, and redundant description will be omitted.

(Viaduct)
First, the viaduct 1 on which the L-shaped wall structure 100 is installed will be described with reference to FIG. 1. For convenience of description, three orthogonal directions are referred to as a first direction X, a second direction Y, and a third direction Z. The first direction X is the direction in which the rails 2 of the elevated bridge 1 extend, and is the width direction of the L-shaped wall structure 100. The second direction Y is the width direction of the elevated bridge 1 and is the overhanging length direction of the horizontal portion 100H of the L-shaped wall structure 100. The third direction Z is the vertical direction of the elevated bridge 1 and the height direction of the vertical portion 100 V of the L-shaped wall structure 100.

  The viaduct 1 extends in the first direction X. The viaduct 1 includes a main girder (a beam portion, a rod body) 3 extending in a first direction X, and the main girder 3 is supported by a plurality of column portions 7 extending in a third direction Z. The projecting part 4 is formed on the main girder 3, has a predetermined width in the second direction Y, and extends in the first direction X. A ground covering portion 5 protruding upward is formed at both ends of the projecting portion 4 in the second direction Y. A rail 2 is disposed on the spring portion 4. Further, an anchor bolt 310 is formed on the side surface of the main girder 3. The side surface of the main girder 3 is a surface facing outward in the second direction Y. The anchor bolt 310 protrudes outward in the second direction Y.

(L-shaped wall structure 100)
Next, the L-shaped wall structure 100 will be described. The L-shaped wall structure 100 includes a hollow box shape. The L-shaped wall structure 100 is formed to have an L-shape as viewed in the first direction X. The L-shaped wall structure 100 includes a horizontal portion 100H extending in the second direction Y, and a vertical portion 100V extending upward in the third direction Z from an end of the horizontal portion 100H. The L-shaped wall structure 100 has a predetermined width in the first direction X. The main body of the L-shaped wall structure 100 has a horizontal portion 100H which is a hollow first box-shaped structure extending in the second direction, and a vertical second part of the hollow second box-shaped structure extending in the third direction Z And a unit 100V.

  As shown in FIGS. 1 and 2, the L-shaped wall structure 100 includes an abutting face plate 300, an upper face plate (first face plate) 110, a front face plate (third face plate) 120, and a bottom face plate (second face plate). 130, a back plate (fourth face plate) 140, a pair of side plates 150, and a zenith plate 160 are provided. The top plate 110 and the bottom plate 130 face in the third direction Z, and the front face 120 and the back plate 140 face in the second direction Y. The pair of side plates 150 are opposed in the first direction X.

  The horizontal portion 100H includes a horizontal portion of the contact face plate 300, the top plate 110, the bottom plate 130, and the pair of side plates 150, and forms a box shape extending in the second direction Y. The vertical portion 100V includes a vertical portion of the front plate 120, the back plate 140, the zenith plate 160, and the pair of side plates 150, and forms a box shape extending in the third direction Z. The L-shaped wall structure 100 also has a mounting portion 200 attached to the anchor bolt 310. The attachment portion 200 is provided on the horizontal portion 100H.

(Abutment face plate 300)
As shown in FIGS. 2 and 5, the contact face plate 300 has a plate-like shape, and in a state of being attached to the elevated bridge 1, constitutes an attachment face that faces the side face of the main girder 3. The contact face plate 300 has a rectangular shape when viewed in the second direction Y. The contact face plate 300 has a rectangular shape with the first direction X as a long side and the third direction Z as a short side. The long side of the contact face plate 300 corresponds to the width of the L-shaped wall structure 100. The short side of the contact face plate 300 corresponds to the length (height) of the main girder 3 in the third direction Z. The thickness direction of the contact face plate 300 is disposed along the second direction Y. The abutment face plate 300 abuts the side surface of the main girder 3 in a state of being attached to the elevated bridge 1. Further, the contact face plate 300 is formed with a plurality of attachment holes 190 penetrating in the thickness direction.

(Top plate 110)
The top plate 110 has a plate shape, and in a state of being attached to the elevated bridge 1, constitutes a surface facing the bottom surface of the projecting portion 4. The top plate 110 extends from the upper side of the contact face plate 300 toward the outside in the second direction Y. The top plate 110 has a rectangular shape as viewed in the third direction Z. The upper surface plate 110 has a rectangular shape in which the second direction Y is a long side and the first direction X is a short side. The short sides of the top plate 110 correspond to the width of the L-shaped wall structure 100. The long side of the upper surface plate 110 corresponds to the overhanging length of the projecting portion 4 in the second direction Y. The thickness direction of the upper surface plate 110 is disposed along the third direction Z. Further, the upper surface plate 110 may be formed such that the outer portion is inclined with respect to the inner portion in the second direction Y. The outer portion of the top plate 110 in the second direction Y may be inclined upward as it goes outward.

(Front plate 120)
The front plate 120 has a plate-like shape, and in a state of being attached to the elevated bridge 1, constitutes a surface facing the side of the rail 2 outside the projecting portion 4. The front plate 120 extends upward in the third direction Z from the outer short side of the top plate 110 in the second direction Y. The front plate 120 is rectangular when viewed in the second direction Y. The front plate 120 has a rectangular shape having the third direction Z as a long side and the first direction X as a short side. The short sides of the front plate 120 correspond to the width of the L-shaped wall structure 100. The long side of the front plate 120 corresponds to the height of the vertical portion 100V. The thickness direction of the front plate 120 is disposed along the second direction Y.

(Bottom plate 130)
The bottom plate 130 has a plate-like shape, and in a state of being attached to the elevated bridge 1, constitutes a surface facing downward. The bottom plate 130 extends from the lower side of the contact face plate 300 toward the outside in the second direction Y. The bottom plate 130 has a rectangular shape when viewed in the third direction Z. The bottom plate 130 has a rectangular shape with the second direction Y as a long side and the first direction X as a short side. The short side of the bottom plate 130 corresponds to the width of the L-shaped wall structure 100. The long side of the bottom plate 130 corresponds to the overhanging length of the projecting portion 4 in the second direction Y. The thickness direction of the bottom plate 130 is disposed along the third direction Z. The bottom plate 130 is disposed upward so as to be closer to the top plate 110 in the second direction Y as the distance from the contact plate 300 is increased. Further, as shown in FIGS. 7 and 10, an opening 290 of the mounting portion 200 is formed in the bottom plate 130.

(Back plate 140)
The back plate 140 has a plate-like shape, and in a state of being attached to the elevated bridge 1, constitutes a surface on the outside of the projecting portion 4 facing the side opposite to the rail 2 side. The back plate 140 constitutes a back portion of the vertical portion 100V. The back plate 140 extends upward in the third direction Z from the outer short side of the bottom plate 130 in the second direction Y. The back plate 140 has a rectangular shape when viewed in the second direction Y. The back plate 140 has a rectangular shape having the third direction Z as a long side and the first direction X as a short side. The short sides of the back plate 140 correspond to the width of the L-shaped wall structure 100. The long side of the back plate 140 corresponds to the height of the vertical portion 100V. The thickness direction of the back plate 140 is disposed along the second direction Y.

(Side plate 150)
The side plate 150 has a plate shape, and in a state of being attached to the elevated bridge 1, constitutes a plane intersecting the first direction X. The side plate 150 is L-shaped when viewed in the first direction X. The horizontal portion 150H of the side plate 150 extends from the short side of the contact face plate 300 toward the outside in the second direction. The horizontal portion 150H is connected to the long side of the top plate 110 and the long side of the bottom plate 130 in the third direction. As the horizontal portion 150H is separated from the contact face plate 300, the width along the third direction is narrowed. The length in the second direction of the horizontal portion 150H corresponds to the length in the second direction Y of the top plate 110 and the bottom plate 130. The thickness direction of the side plate 150 is formed along the first direction X.

  The vertical portion 150V of the side plate 150 extends upward in the third direction Z from the horizontal portion 150H. The vertical portion 150 V is connected to the short side of the zenith plate 160. The vertical portion 150 V is connected to the long side of the front plate 120 and the long side of the back plate 140 in the second direction Y. When viewed in the first direction X, the vertical portion 150V forms a vertically long rectangle. The length in the third direction Z of the vertical portion 150V corresponds to the length in the third direction Z of the front plate 120 and the back plate 140.

(Zenith plate 160)
The zenith plate 160 has a plate-like shape, and in a state of being attached to the elevated bridge 1, constitutes a plane intersecting in the third direction Z. The zenith plate 160 has a rectangular shape when viewed in the third direction Z. The zenith plate 160 has a rectangular shape with the first direction X as a long side and the second direction Y as a short side. The long side of the zenith plate 160 corresponds to the width of the L-shaped wall structure 100. The short side of the zenith plate 160 corresponds to the thickness of the vertical portion 100V. The thickness direction of the zenith plate 160 is disposed along the third direction Z.

(Mounting part 200)
As shown in FIG. 1, the L-shaped wall structure 100 is a cantilevered structure, and is attached to the side 3 a of the main girder 3. The L-shaped wall structure 100 is attached only to the side surface 3 a of the main girder 3, for example. The L-shaped wall structure 100 includes an abutting face plate 300 as a mounting surface attached to the side surface 3 a of the main girder 3.

  The L-shaped wall structure 100 has a plurality of mounting portions 200 as shown in FIG. The plurality of mounting portions 200 are provided on the horizontal portion 100H. The plurality of attachment portions 200 are provided at predetermined intervals in the first direction X. The attachment portion 200 includes an attachment portion top plate 210, an attachment portion seat plate 211, an attachment portion side plate 212, a pair of attachment portion side plates 212, and an attachment portion inclined plate 213. The mounting portion 200 has a form in which it is recessed upward (including a recess) in the third direction Z from the bottom plate 130. The mounting portion 200 has a trapezoidal shape when viewed in the first direction X, and has a rectangular shape when viewed in the third direction Z. For example, three attachment portions 200 are formed, and 200 disposed at the center in the first direction X is longer in the second direction Y than the attachment portions 200 disposed on the outside thereof.

(Mounting part top plate 210)
The mounting portion top plate 210 has a plate shape, and has a rectangular shape when viewed from the third direction Z. The mounting portion top plate 210 has a long side in the second direction Y and a short side in the first direction X. The mounting portion top plate 210 constitutes a ceiling portion of the mounting portion 200. The mounting portion top plate 210 is disposed above the bottom plate 130 in the third direction Z. The mounting portion top plate 210 is in contact with the inner surface (rear surface) of the upper surface plate 110 and integrated (joined) with the upper surface plate 110. The plate thickness direction of the mounting portion top plate 210 is disposed along the third direction Z.

(Mounting part seat plate 211)
The mounting portion seat plate 211 has a plate-like shape, and when viewed from the second direction Y, has a rectangular shape. The attachment portion seat plate 211 has a long side in the third direction Z and a short side in the first direction X. The attachment portion seat plate 211 extends downward from the short side of the attachment portion top plate 210 on the side of the contact surface plate 300. The mounting portion seat plate 211 is connected to the mounting portion top plate 210 and the bottom plate 130 in the third direction Z. The width along the first direction X of the attachment portion seat plate 211 corresponds to the length of the short side of the attachment portion top plate 210. The attachment portion seat plate 211 faces the contact face plate 300 in the second direction Y. The mounting portion seat plate 211 is disposed outside the contact surface plate 300 in the second direction Y. The plate thickness direction of the attachment portion seat plate 211 is disposed along the second direction Y. Further, in the mounting portion seat plate 211, a mounting hole 190 penetrating in the thickness direction is formed. The mounting portion seat plate 211 constitutes an inner wall A of the mounting portion 200.

(Mounting part inclined plate 213)
The mounting portion inclined plate 213 has a plate shape, and has a rectangular shape when viewed from the plate thickness direction. As shown in FIG. 10, the attachment portion inclined plate 213 is disposed to be inclined with respect to the attachment portion top plate 210. The attachment portion side plate 212 extends obliquely downward from the outer short side of the attachment portion top plate 210 in the second direction Y. The mounting portion side plate 212 is inclined so as to be disposed lower as it is separated from the contact surface plate in the second direction Y. The mounting portion inclined plate 213 is connected to the mounting portion seat plate 211 and the bottom plate 130. The width along the first direction X of the attachment portion inclined plate 213 corresponds to the length of the short side of the attachment portion top plate 210. The mounting portion inclined plate 213 constitutes an inner wall B of the mounting portion 200.

(Mounting side plate 212)
The pair of attachment portion side plates 212 have a plate shape and are disposed to face in the first direction X. The mounting portion side plate 212 is connected to the mounting portion top plate 210 and the bottom plate 130 in the third direction Z, and is connected to the mounting portion seat plate 211 and the mounting portion inclined plate 213 in the second direction Y. The plate thickness direction of the attachment portion side plate 212 is disposed along the first direction X. The mounting portion side plate 212 constitutes an inner wall C of the mounting portion 200.

(Seal tube 220)
The sheath tube 220 is connected to the contact face plate 300 and the mounting portion seat plate 211 as shown in FIGS. 5 and 10. The sheath tube 220 has a tubular shape and constitutes an inner wall surface of the mounting hole 190. In a state where the L-shaped wall structure 100 is attached to the elevated bridge 1, an opening through which the anchor bolt 310 is inserted is configured. The sheath tube 220 constitutes an elongated hole whose longitudinal direction is the third direction Z when viewed from the second direction Y. The sheath tube 220 has a cross-sectional performance having a compressive strength corresponding to the tightening force of the anchor bolt 310 at the time of fixation. The sheath tubes 220 are provided corresponding to the attachment portion seat plate 211, and are disposed at a total of three places in the attachment portion 200.

  As described above, the mounting portion 200 is formed of the mounting portion top plate 210, the inner wall A, the inner wall B, and the inner wall C, and is formed as a recess (opening 290) recessed upward from the bottom plate 130. For example, although the number of the mounting portions 200 and the mounting holes 190 is illustrated as three, other numbers may be used. The number of the mounting portions 200 and the mounting holes 190 is determined by the size (for example, the length in the width (X) direction) of the L-shaped wall structure 100 and the support condition, and may be one or four or more, for example. . Similarly, although the number of anchor bolts 310 is illustrated as three for one mounting hole 190, it may be two or less, or four or more for one mounting hole 190.

  Further, as shown in FIG. 11, the opening length KL of the opening 290 of the mounting portion 200 is a length along the second direction Y. The opening length KL of the central opening 290 in the first direction X is different from the opening length KL of the outer opening 290. This relates to the length with which the web 171 of the internal rib 170 described later abuts on the attachment top plate 210. Further, the opening length KL and the opening width KW of the opening 290 at the central opening in the first direction X are related to the size of the tightening power tool used when fixing the L-shaped wall structure 100. . The opening width KW is a length along the first direction X.

(Installation structure of L-shaped wall structure 100)
An installation structure for attaching the L-shaped wall structure 100 to a housing (for example, the main girder 3) will be described. The L-shaped wall structure 100 is attached using an anchor bolt 310 and a nut 340 which project from the main girder 3 of the frame of the elevated bridge 1 to which it is attached. The anchor bolt 310 is inserted into the mounting hole 190 (sheath 220), the base plate 320 and the washer 330 are arranged on the tip of the anchor bolt 310 protruding from the mounting portion seat plate 211, and the nut 340 is fitted. Tighten with appropriate force. Thereby, the L-shaped wall structure 100 is fixed to the main girder 3 of the elevated bridge 1. Furthermore, if necessary, grout may be injected and fixed in the opening of the sheath tube 220 after the nut 340 is tightened.

(Inclusion box 180)
Next, the inclusion box 180 will be described. The vertical portion 100V of the L-shaped wall structure 100 includes the containing box 180 shown in FIGS. 4 and 18. The inclusion box 180 constitutes a recess that is recessed inward from the back plate 140. The inclusion box 180 is provided on the lower side of the vertical portion 100V. A plurality of inclusion boxes 180 are provided. The width of the containing box 180 is the same as the width (opening width KW) of the mounting portion 200. In addition, the arrangement position of the inner box 180 in the first direction X is the same as that of the attachment portion 200. The inclusion box 180 includes a box top plate 181, a box inclined plate 183, and a pair of box side plates 182. In addition, what was beforehand shape | molded as the inclusion box 180 may be arrange | positioned with respect to the perpendicular | vertical part 100V, the fiber materials which impregnated resin may be laminated | stacked, a contact part may be reinforced and joined, Resin-impregnated reinforcing fibers may be laminated.

(Box top plate 181)
The box top plate 181 has a plate shape, and when viewed from the first direction X, has a rectangular shape. The box top plate 181 has a long side in the third direction Z and a short side in the first direction X. The bottom plate 130 is in contact with the inner surface (rear surface) of the top plate 110 and integrated with the top plate 110. The plate thickness direction of the mounting portion top plate 210 is disposed along the third direction Z. The box top plate 181 abuts on the inner surface (rear surface) of the front plate 120 and is integrated (joined) with the front plate 120. The thickness direction of the box top plate 181 is disposed along the second direction Y.

(Box inclined plate 183)
The pair of box inclined plates 183 is disposed on both sides of the box top plate 181 in the third direction Z. The box inclined plate 183 has a plate shape, and has a rectangular shape when viewed in the plate thickness direction. The box inclined plate 183 is disposed to be inclined with respect to the box inclined plate 183. The upper box inclined plate 183 extends obliquely upward from the upper short side in the third direction Z of the box top plate 181. The upper box inclined plate 183 is inclined so as to be disposed higher as it is farther from the box top plate 181 in the second direction Y. The lower box inclined plate 183 extends obliquely downward from the lower short side of the box top plate 181 in the third direction Z. The lower box inclined plate 183 is inclined so as to be disposed lower as it is farther from the box top plate 181 in the second direction Y. The distance between the pair of box inclined plates 183 is formed so as to increase with distance from the box top plate 181. The outer end of the box inclined plate 183 in the second direction Y is connected to the back plate 140. The length (width) of the box inclined plate 183 in the first direction X corresponds to the length of the box top plate 181 in the first direction X. The pair of box inclined plates 183 constitutes the upper and lower portions of the inner box 180.

(Box side plate 182)
The pair of box side plates 182 is disposed on both sides of the box top plate 181 in the first direction X. The box side plate 182 has a plate shape, and has a trapezoidal shape when viewed from the first direction X. The box side plate 182 is continuous from the long side of the box top plate 181 to the bottom plate 130 in the second direction Y. The oblique side of the box side plate 182 is connected to the pair of box inclined plates 183. The thickness direction of the box side plate 182 is disposed along the first direction X. The box side plate 182 constitutes the side of the inner box 180.

(Inclusion rib 170)
Next, the internal rib 170 will be described. The L-shaped wall structure 100 includes an inclusion rib 170. The internal rib 170 is disposed in the hollow portion of the L-shaped wall structure 100, as shown in FIG. The internal rib 170 has an L shape as viewed from the first direction X, as shown in FIG. The inner rib 170 includes a horizontal portion 170H extending in the second direction Y and a vertical portion 170V extending in the third direction.

  The L-shaped wall structure 100 includes, for example, four internal ribs 170. The pair of inner ribs 170 is disposed to face the first direction X. The pair of inner ribs 170 is disposed on both sides of the attachment portion 200 and the inner box 180 in the first direction X.

  The internal rib 170 includes a web 171, a flange A (first flange) 172 and a flange B (second flange) 173. The web 171 has a plate shape, and is formed to have an L shape when viewed from the first direction X. The shape of the web 171 corresponds to the shape of the side plate 150. The thickness direction of the web 171 is disposed along the first direction X. The horizontal portion 170 H of the web 171 is disposed to connect the top plate 110 and the bottom plate 130. The vertical portion 100 V of the web 171 is arranged to connect the front plate 120 and the back plate 140.

  The flange A 172 protrudes from the end in the width direction of the web 171 in the first direction X. In the horizontal portion 170H, the plate thickness direction of the flange A172 is disposed along the third direction Z. In the horizontal portion 170H, as shown in FIG. 9A, the flange A 172 abuts on the inner surface (rear surface) of the upper surface plate 110 and is integrated (joined) with the upper surface plate 110. In the vertical portion 170V, the plate thickness direction of the flange A172 is disposed along the second direction Y. In the vertical portion 170 V, the flange A 172 abuts on the inner surface (rear surface) of the front plate 120 and is integrated (joined) with the front plate 120.

  The flange B 173 protrudes in the first direction X from the end in the width direction of the web 171. The flange B173 overhangs in the same direction as the flange A172. In the horizontal portion 170H, the plate thickness direction of the flange B173 is disposed along the third direction Z. In the horizontal portion 170H, the flange B173 abuts on the inner surface (rear surface) of the side surface plate 150 and is integrated (joined) with the side surface plate 150. In the vertical portion 170V, the plate thickness direction of the flange B173 is disposed along the second direction Y. In the vertical portion 170 V, the flange B 173 abuts on the inner surface (back surface) of the back plate 140 and is integrated (joined) with the back plate 140. Further, the directions in which the flange A 172 and the flange B 173 extend are opposite in adjacent inclusion ribs 170.

  As shown in FIGS. 8A and 8B, in the vertical portion 170V, a part of the web 171 is in contact with the box side plate 182 of the inner box 180. The web 171 and the box side plate 182 abut in the first direction X.

  As shown in FIG. 9A and FIG. 9B, in the horizontal portion 170H, a part of the web 171 is in contact with the attachment side plate 212. The web 171 and the attachment side plate 212 abut in the first direction. In the horizontal portion 170H, the flange B173 is disposed in the vicinity of a corner portion where the bottom plate 130 and the attachment portion side plate 212 intersect. The web 171 is deformed so as to form a relief A (a first relief portion, a gap) 174 between the web 171 and the attachment side plate 212. In the relief A 174, in the first direction X, the web 171 is recessed away from the attachment side plate 212. As described above, by forming the relief A 174 in the vicinity of the corner where the bottom plate 130 and the attachment portion side plate 212 intersect, the flange B 173 can be prevented from being unable to be joined to the bottom plate 130.

  As shown in FIG. 8A and FIG. 8B, in the vertical portion 170V, a part of the web 171 is in contact with the box side plate 182. The web 171 and the box side plate 182 abut in the first direction. In the vertical portion 170 V, the flange B 173 is deformed so as to form a relief B (second relief portion, gap) 175 between the back plate 140 and the box side plate 182. In the relief B 175, the web 171 is recessed away from the box side plate 182 in the first direction X. Thus, by forming the relief B 175 in the vicinity of the corner where the back plate 140 and the box side plate 182 intersect, the flange B 173 can be prevented from being unable to be joined to the back plate 140.

(Corner R portion 105)
Next, the corner R portion 105 will be described. The corner R portion 105 is a corner portion which is a connection portion between the horizontal portion 100H and the vertical portion 100V. The corner R portion 105 includes a connection portion between the top plate 110 and the front plate 120, a connection portion between the bottom plate 130 and the back plate 140, and a bent portion of the side plate 150. The curvature radius of the corner R portion 105 is preferably in the range of 50 mm or more and 200 mm or less. By setting the curvature radius to 50 mm or more, stress concentration at the corner R portion 105 can be relaxed. When the radius of curvature is less than 50 mm, stress concentration at the corner R portion 105 is increased, and there is a risk of breakage. When the radius of curvature is 200 mm or less, the shape effect on rigidity is high, and the occurrence of buckling deformation when a bending load due to wind load acts on the corner R portion 105 can be relaxed, and bending deflection can be suppressed. When the radius of curvature exceeds 200 mm, the shape effect on rigidity is weakened, and when a bending load by wind load acts on the corner R portion 105, buckling deformation may be induced and bending deflection may be increased.

(Bracket 400)
Next, the bracket 400 will be described. As shown in FIGS. 12 and 13, the bracket 400 is a member attached to the outer surface (surface) of the front plate 120 and disposed on the ground cover 5. The bracket 400 has a mount 400a, a support 400b, and a skirt 400c. The length in the first direction X of the bracket 400 corresponds to the length (width) in the first direction X of the L-shaped wall structure 100. The bracket 400 is formed of, for example, a metal material (for example, stainless steel or the like).

  The mount portion 400 a has a plate shape and is a portion that abuts on the outer surface of the front plate 120. When viewed in the second direction Y, the mount portion 400a has a rectangular shape having the first direction X as a long side and the third direction Z as a short side. The plate thickness direction of the mount portion 400 a is disposed along the second direction Y. The mount portion 400 a is disposed at a position corresponding to the box top plate 181 in the third direction Z. The mounting portion 400 a is provided with a mounting hole through which the mounting bolt 420 is inserted. Similarly, mounting holes through which mounting bolts 420 are inserted are formed in the front plate 120 and the box top plate 181. Further, the embedded nut 410 is arranged and fixed in advance on the inner surface of the box top plate 181 at a position corresponding to the mounting hole. The mounting bolt 420 is inserted from the outer side to the inner side of the front plate 120 and screwed to the embedded nut 410. The mounting portion 400 a is fixed to the front plate 120 by tightening the mounting bolt 420.

  The support portion 400 b has a plate shape and is a portion disposed to face the top surface of the ground cover 5. The support portion 400 b is bent from the lower end portion of the mount portion 400 a and protrudes in the second direction Y (rail 2 side). The support portion 400 b forms a rectangle having the first direction X as a long side and the second direction Y as a short side when viewed from the third direction Z. The plate thickness direction of the support portion 400 b is disposed along the third direction Z. The length in the second direction Y of the support portion 400 b is slightly longer than the length (width) in the second direction Y of the ground covering portion 5. The support portion 400 b is arranged to have a gap with the ground cover 5 in the third direction Z.

  In the support portion 400b, an insertion hole through which the adjustment bolt (position adjustment portion) 430 is inserted is formed. A nut is fixed to the surface (upper surface) of the support portion 400b at a position corresponding to the insertion hole. The adjustment bolt 430 is inserted from above into the nut and the insertion hole, and protrudes downward from the back surface (lower surface) of the support portion 400 b. The tip of the adjustment bolt 430 is abutted against the ground cover 5. By screwing in the adjustment bolt 430, the height position of the support portion 400 b with respect to the ground cover 5 can be adjusted. Thereby, the position of the mount portion 400a can be adjusted, and the position of the L-shaped wall structure 100 in the third direction Z can be adjusted.

  The skirt portion 400c has a plate shape, and is a portion disposed to face the side surface of the ground cover portion 5 (the side surface on the rail 2 side in the second direction Y). The skirt portion 400c is bent from the end portion on the side of the track 2 in the second direction Y of the support portion 400b and extends downward. The skirt portion 400c has a rectangular shape having the first direction X as a long side and the third direction Z as a short side, as viewed from the second direction Y. The skirt 400 c is configured to be engageable with the ground cover 5. For example, when the nut 340 is loosened and the L-shaped wall structure 100 is displaced, the bracket 400 is caught on the ground covering portion 5 and the falling of the L-shaped wall structure 100 is prevented.

(Closing member)
Next, the gap plate and the apron will be described. As shown in FIG. 16, the L-shaped wall structures 100 are arranged side by side in the first direction X. As shown in FIG. 15, a gap 520 is provided between the adjacent L-shaped wall structures 100 in the first direction X. By providing the gap 520 in this manner, it can be used as an adjustment margin for the arrangement of the L-shaped wall structure 100. A gap plate (closing member) 510 and an apron 500 are disposed as closing members between the L-shaped wall structures 100 adjacent in the first direction X. The gap plate 510 and the apron 500 are members made of FRP.

(Apron 500)
The apron 500 is a member which covers the bracket 400, as shown in FIG. The apron 500 includes a mounting plate 500a, an inclined plate 500b, and a hanging plate 500c3. The apron 500 is disposed straddling a plurality of L-shaped wall structures 100 as shown in FIG. The apron 500 corresponds to the width of the plurality of L-shaped wall structures 100 in the first direction X. The apron 500 is formed of a metal material (for example, stainless steel).

  The mounting plate 500 a has a plate shape and is a portion that abuts on the outer surface of the front plate 120. The mounting plate 500 a has a rectangular shape having the first direction X as a long side and the third direction Z as a short side when viewed from the second direction Y. The thickness direction of the mounting plate 500 a is disposed along the second direction Y. The mounting plate 500 a is disposed above the mount portion 400 a of the bracket 400 in the third direction Z. The mounting plate 500 a is provided with a mounting hole through which the blind bolt 505 is inserted. Similarly, the front plate 120 is formed with a mounting hole through which the blind bolt 505 is inserted. The mounting hole through which the blind bolt 505 is inserted is provided at a position where the inner box 180 is not disposed in the first direction X. In addition, a buried nut is disposed in advance and fixed to the inner surface of the front plate 120 at a position corresponding to the mounting hole. The blind bolt 505 is inserted from the outer side to the inner side of the front plate 120 and screwed to the embedded nut. The fastening plate 500 a is fixed to the front plate 120 by tightening the blind bolt 505.

  The inclined plate 500b has a plate shape and covers the mount portion 400a and the support portion 400b from diagonally above. The inclined plate 500b is bent from the lower end of the mounting plate 500a and protrudes obliquely downward. The inclined plate 500b has a rectangular shape having the first direction X as a long side and the second direction Y as a short side when viewed from the thickness direction. The inclined plate 500 b extends in the second direction Y further to the side of the rail 2 than the side surface of the ground cover 5.

  The hanging plate 500 c has a plate shape and is a portion that covers the side surface of the ground cover 5 and the skirt 400 c. The hanging plate 500c is bent from the lower end of the inclined plate 500b and possibly protrudes. When viewed from the second direction Y, the hanging plate 500c forms a rectangle having the first direction X as a long side and the third direction Z as a short side. The hanging plate 500c extends below the lower end of the skirt 400c in the third direction Z.

  Moreover, the concrete injection port 507 is provided in the inclination board 500b. After standing adjustment is completed, the concrete is poured into the space between the apron 500 and the bracket 400 from the concrete inlet 507 and solidified to integrate the bracket 400 and the apron 500 with the ground covering portion 5 of the viaduct 1 can do. Thus, since the standing adjustment function can be held, maintenance inspection of the bracket 400 can be omitted. As a result, maintenance manual inspection items can be reduced and maintenance costs can be reduced.

(Gap plate 510)
The gap plate 510 is a member that closes the gap 520 between the L-shaped wall structures 100. The gap plate 510 includes a vertical portion extending in the third direction Z on the front plate 120 side and a horizontal portion extending in the second direction Y on the zenith plate 160 side. The cross-sectional shape intersecting the longitudinal direction of the gap plate 510 is, for example, T-shaped. The gap plate 510 includes a flange portion 512 and a web portion 513. The flange portion 512 and the web portion 513 have a plate shape and are arranged to intersect.

  The vertical portion (first closing plate) of the flange portion 512 is arranged to cover the gap 520 from the outer surface side of the front plate 120. The thickness direction of the vertical portion of the flange portion 512 is disposed along the second direction Y. When viewed in the second direction Y, the vertical portion of the flange portion 512 forms a vertically long rectangle having the third direction Z as a long side and the first direction X as a short side. The lower end of the vertical portion of the flange portion 512 is, as shown in FIG. The vertical portion of the flange portion 512 extends to a height corresponding to the zenith plate 160.

  The vertical portion of the web portion 513 is inserted into the gap 520 from the front plate 120 side in the second direction. The thickness direction of the vertical portion of the web portion 513 is disposed along the first direction X. The vertical portion of the web portion 513 forms a vertically long rectangle having the third direction Z as a long side and the second direction Y as a short side when viewed from the first direction X.

  The horizontal portion (second closing plate) of the flange portion 512 is arranged to cover the gap 520 from above the zenith plate 160. The plate thickness direction of the horizontal portion of the flange portion 512 is disposed along the third direction Z. The horizontal portion of the flange portion 512 forms a rectangle having the second direction Y as a long side and the first direction X as a short side when viewed from the third direction Z.

  The horizontal portion of the web portion 513 is inserted into the gap 520 from the zenith plate 160 side in the third direction Z. The thickness direction of the horizontal portion of the web portion 513 is disposed along the first direction X. The horizontal portion of the web portion 513 forms a rectangle having the second direction Y as a long side and the third direction Z as a short side, as viewed from the first direction X.

  Also, the flange portion 512 includes a back surface portion extending downward from an end of the horizontal portion on the bottom surface plate 130 side. The rear surface portion of the flange portion 512 is arranged to cover the gap 520 from the outer surface side of the rear plate 140. The thickness direction of the rear surface portion of the flange portion 512 is disposed along the second direction Y. The rear surface portion of the flange portion 512 has a rectangular shape when viewed in the second direction Y. The length in the third direction of the back surface portion of the flange portion 512 corresponds to the length in the third direction of the horizontal portion of the web portion 513 as shown in FIG. The end of the horizontal portion of the web portion 513 on the side of the back plate 140 is connected to the back portion of the flange portion 512 as shown in FIG.

  As shown in FIG. 14, a slit 530 is provided at the lower end of the gap plate 510. The slit 530 is a gap formed by separating the lower end portion of the flange portion 512 from the web portion 513. Thus, the mounting plate 500 a of the apron 500 can be inserted between the flange portion 512 and the front plate 120 in a state where the gap plate 510 is mounted.

  Since this gap plate 510 is made of FRP, it is lightweight and excellent in handleability, can be easily installed on site, and can shorten the installation operation time. For example, the gap plate 510 can be installed on the L-shaped wall structure 100 simply by hooking the gap plate 510. For example, in the prior art, since the closing member is joined to the wall structure by a joining method such as a rivet, a construction time is required. In the gap plate 510, the lower end portion of the gap plate 510 can be fitted by inserting the upper end portion of the apron 500 into the slit 530 at the lower end portion. Therefore, it is not necessary to apply a rivet or the like on site. As a result, the construction time can be shortened.

(Horizontal rib 177)
Next, the lateral rib 177 will be described with reference to FIG. The L-shaped wall structure 100 may be configured to include the lateral rib 177. The transverse rib 177 extends in the first direction X and is connected to the adjacent containing rib 170. A plurality of lateral ribs 177 are provided in the first direction X, and connect the internal rib 170 and the side plate 150. Also, a plurality of lateral ribs 177 are disposed at different positions in the third direction Z. The transverse rib 177 includes a web and a pair of flanges. The web has a plate shape and has a rectangular shape when viewed in the third direction Z. The thickness direction of the web is disposed along the third direction Z. A pair of flanges extend downward from both widthwise ends of the web. The thickness direction of the web is disposed along the second direction Y. The flange on the front plate 120 side is abutted and joined to the front plate 120. The flange on the back plate 140 side is abutted and joined to the back plate 140.

  When a plurality of such transverse ribs 177 are provided, while reducing the weight of the L-shaped wall structure 100, it suppresses shear deformation such as the surface of the front plate 120 and the back plate 140 due to twisting being recessed. can do. By providing such a transverse rib 177, the width of the L-shaped wall structure 100 can be increased. When the width of the L-shaped wall structure 100 is short, the front plate 120 and the rear plate 140 are less likely to be deformed, and the lateral rib 177 may not be provided.

(Modification)
The L-shaped wall structure may have a mesh-like portion in the vertical portion 100V. A rectangular opening passing through the front plate 120 and the back plate 140 is provided in the vertical portion 100V, and a mesh-like portion made of FRP, for example, is disposed in the opening. The aperture ratio of the mesh-like portion can be, for example, 60%. According to the L-shaped wall structure provided with such a mesh-like portion, it is possible to realize a windproof structure having a windproof function for reducing the pressure of wind. Also, instead of the mesh-like portion, for example, a transparent plate may be disposed. With such an L-shaped wall structure, it is possible for the vehicle traveling on the rail 2 to have a view on the rear side of the L-shaped wall structure. Therefore, it is possible to realize a view-oriented soundproof structure capable of enjoying the view from the car window using the L-shaped wall structure. Further, a capillary assembly having a predetermined length in the second direction Y from the side of the track 2 may be disposed in the vertical portion 100V. The capillary assembly may be disposed, and a cotton-like sound absorbing medium, a reflection plate (back plate 140) may be disposed behind the capillary assembly. Thereby, it is possible to construct an L-shaped wall structure having a sound absorbing function.

(Fiber-reinforced resin)
Abutment plate 300, top plate 110, side plate 150, bottom plate 130, back plate 140, pair of side plates 150, zenith plate 160, mounting portion 200, inner box 180, sheath tube 220 for L-shaped wall structure 100 The inner rib 170 and the lateral rib 177 are formed of a fiber reinforced resin. The fiber reinforced resin comprises a textile substrate comprising at least continuous reinforcing fibers.

  The L-shaped wall structure 100 formed of such a fiber reinforced resin can suppress the development of cracks caused by "salt damage" and "freeze / thaw", so the durability is improved, and each plate It is possible to increase the in-plane rigidity of the frame-shaped structural portion. Thereby, bending rigidity can be secured while achieving weight reduction of the L-shaped wall structure 100.

  In addition, the fiber volume content of the continuous fiber base material laminated in the thickness direction of each member is preferably 10% to 40%, and is configured to be 20% to 30%. More preferable. As a result, the strength can be improved while maintaining a predetermined bending rigidity, so that the weight can be further reduced. The fiber volume content is preferably 10% or more, and more preferably 20% or more. The fiber volume content is preferably 40% or less, more preferably 30% or less.

(Reinforcing fiber of fiber reinforced resin)
As the reinforcing fibers of the fiber reinforced resin, for example, glass fibers, aramid fibers, carbon fibers and the like can be used alone or in combination. By including carbon fibers, the specific strength and the specific rigidity can be improved. As a result, the weight of the L-shaped wall structure 100 can be further reduced.

  In addition, as a form of a reinforced fiber, the base material which combined suitably the "cross | flute and mat | matte whose fiber length is 1-3 mm", "the cloth | cross which consists of continuous fibers", "strand" etc. is illustrated. Also, the matrix resin for forming a fiber reinforced resin is not particularly limited, but, for example, thermosetting resins such as epoxy resin, unsaturated polyester resin, vinyl ester resin, polyethylene, polypropylene, nylon, ABS (acrylonitrile butadiene -Thermoplastic resins, such as styrene), PEEK (poly-ether-ether-ketone) and polyimide, can be used.

(Method of molding fiber reinforced resin)
As a molding method for molding a fiber reinforced resin, a matrix resin can be used. Alternatively, as a molding method for molding a fiber reinforced resin, vacuum, blow, stamping, BMC (bulk molding compound), SMC (sheet molding compound), transfer molding, RTM (resin, depending on the form of the reinforcing fiber) It can be easily molded using various methods such as transfer molding, hand lay-up molding and the like.

  In addition to the filler (for example, calcium carbonate, sand, etc.) for increasing the viscosity of the filler to be filled in the fiber reinforced resin, layered compounds (eg, mica, molybdenum disulfide, boron nitride, etc.), needles Compounds (eg, Zonotolite, potassium titanate, carbon fiber, etc.), granular, or sheet-like compounds (eg, ferrite, talc, clay, etc.) may be added. As a result, conversion to frictional heat is achieved by the mutual movement of the inorganic crystals or between the inorganic and the matrix. By filling the matrix resin with a filler, the modulus of elasticity and density are increased, the resistance to vibration is increased, and the vibration control characteristics are improved. By using such an L-shaped wall structure 100 as a wall structure, vibration is reduced.

  Such an L-shaped wall structure 100 has a hollow box-like structure, so that weight reduction can be achieved. Further, since the main body of the L-shaped wall structure 100 is L-shaped, the contact face plate 300 of the horizontal portion 100H extending in the second direction Y can be fixed to the main girder 3 . Therefore, the L-shaped wall structure 100 can be installed on the casing without being fixed to the projecting portion 4, so that the load acting on the projecting portion 4 can be reduced. By reducing the load acting on the projecting portion 4, the occurrence of cracking in the projecting portion 4 can be suppressed, and the reliability of the high bridge 1 can be improved.

  Further, in the L-shaped wall structure 100, since the mounting hole 190 is communicated to the recess (opening 290) of the mounting portion 200, the installation tool is inserted inside the recess, and the tightening operation of the nut 340 is performed from the outer surface side. It can be performed. This can improve the workability. Moreover, loosening of the nut 340 can be eliminated by visually recognizing from the outer surface side. In addition, since a hollow box-shaped structure is adopted, weight reduction can be achieved while maintaining bending rigidity.

  In the horizontal portion 100H of the L-shaped wall structure 100, the length in the third direction Z decreases as the overhanging length in the second direction Y increases. Weight reduction can be achieved while receiving bending stress that acts.

  In the L-shaped wall structure 100, since the inner rib 170 is provided and the inner rib 170 is connected to the top plate 110, the front plate 120, the bottom plate 130 and the back plate 140, the L-shaped wall structure is used. Bending rigidity and bending strength can be improved.

  Further, the L-shaped wall structure 100 includes the inner box 180, and the inner rib 170 and the inner box 180 are integrated with the inner box 180 and the attachment portion 200 interposed therebetween, and the inner rib 170 and the attachment portion 200 can be integrated. Thereby, the stress which acts by the bending force of a wind load can be suitably distributed via internal rib 170. As shown in FIG. Thereby, the lateral falling buckling of the internal rib 170 can be prevented.

Example 1
Next, the L-shaped wall structure 100 according to the first embodiment will be described. An L-shaped wall structure 100 shown in FIGS. 1 and 2 was manufactured as Example 1. The dimensions of the L-shaped wall structure 100 of Example 1 are as follows. The length (width) in the first direction X of the L-shaped wall structure 100 is 1 [m]. The length of the horizontal direction 100H in the second direction Y is 3 [m]. The length in the second direction Y of the horizontal portion 100H is the length from the outer surface of the contact face plate 300 to the outer surface of the back plate 140 in the second direction Y. The thickness in the third direction of the portion fixed to the main girder 3 was 0.5 [m]. The thickness in the third direction Z of the portion fixed to the main girder 3 is the length in the third direction Z of the outer surface of the contact face plate 300. The thickness in the third direction Z of the overhanging tip portion was 0.5 [m]. The thickness in the third direction Z of the overhanging tip portion is the thickness in the third direction Z of the end on the vertical portion 100V side of the horizontal portion 100H. The height in the third direction of the vertical portion 100V is 5 [m]. The height of the vertical portion 100V is the length from the lower end of the vertical portion 100V to the outer surface of the zenith plate 160. The thickness in the second direction of the vertical portion 100V is 0.25 [m]. The thickness of the vertical portion 100V is the length from the outer surface of the front plate 120 to the outer surface of the back plate 140 in the second direction Y.

(Method of manufacturing L-shaped wall structure 100 of Example 1)
Next, a method of manufacturing the L-shaped wall structure 100 of the first embodiment will be described.

(Material used)
A reinforcing fiber base comprising chopped strand mat and glass roving cloth was used. The chopped strand mat (hereinafter referred to as a mat) is a sheet-like substrate by cutting glass fibers into a predetermined length and randomly dispersing them. The mat used for the L-shaped wall structure 100 has a fiber basis weight of 300 [g / m ² ] mat MC 300 (trade name, manufactured by NITTOBO CO., LTD.) And a fiber basis weight of 450 [g / m ² ] Mat MC 450 (trade name, manufactured by Nittobo Co., Ltd.).

Glass roving cloth is a woven fabric using glass roving for warp and weft. The woven fabric used for the L-shaped wall structure 100 is a plain weave woven fabric, and is a roving cloth WR 800 (trade name, manufactured by Nittobo Co., Ltd.) having a fiber weight of 800 [g / m ² ]. The resin used to form the L-shaped wall structure 100 is an unsaturated polyester resin to which 30 parts of aluminum hydroxide is added in order to impart flame retardancy. (Hereafter, it is referred to as "flame retardant resin".) The resin used for joining the preformed outer step-up members (inner box 180 member, sheath tube 220, inner rib 170, horizontal rib 177) is a flame retardant resin. It is a putty-like resin obtained by adding 10 parts of a filler which is glass fiber cut to a length of [mm] and adding 20 parts of talc as a thickener (hereinafter referred to as "bonding resin").

(Molding method)
As a method of molding the L-shaped wall structure 100, hand lay-up molding was used.

(Step 1)
The first step is a step of preforming the outer setting member. The outer setting member is the inner box 180, the sheath tube 220, the inner rib 170, and the lateral rib 177.

(Formation process of the inclusion box 180)
The mold 1 for molding the inner box 180 is a mountain-shaped male mold, and has a trapezoidal side surface shape. The length of the upper side of the trapezoid of the forming die 1 is 0.5 [m], the length of the lower side is 1.0 [m], and the height is 0.24 [m]. The width of the mold 1 was 0.2 m. This width is the same length as the first direction X of the mounting portion top plate 210 of the mounting portion 200.

After the mold 1 is subjected to release treatment, gel coat is applied to the mold 1 at about 500 g / m ^{2 to} 800 g / m ² , and the box top plate 181, box inclined plate 183, and box side plates 182 on both sides are applied. While forming, the following first to fifth layers were sequentially stacked on the mold 1.
First layer: A mat MC300 was impregnated with a flame retardant resin, and two sheets were laminated to form a first layer.
Second layer: Roving cloth WR 800 was impregnated with a flame retardant resin and laminated to form a second layer.
Third layer: A mat MC300 was impregnated with a flame retardant resin and laminated to form a third layer.
Fourth layer: A roving cross WR 800 was impregnated with a flame retardant resin and laminated to form a fourth layer.
Fifth layer: A mat MC300 was impregnated with a flame retardant resin and laminated to form a fifth layer.

  In addition, the resin was cured on the mold 1. After demolding, the embedded nut 410 of M16 is disposed at the center position of the inner surface of the box top plate 181, and the mat MC450 is overlaid with two mat MC450 so as to cover the embedded nut 410 while impregnating the mat MC450 with the flame retardant resin. The following process was carried out. By repeating this process, it is possible to obtain two inclusion boxes 180 in which one side of the hexahedron is open. Here, overlay refers to laminating and reinforcing and bonding (fixing) a fiber base while impregnating a resin on a preformed member such as an FRP part or metal.

(Forming process of the sheath tube 220)
The mold 2 for molding the sheath tube 220 is an elongated hole-shaped uniform cross-section mandrel mold. In the step of forming the sheath tube 220, after the mold 2 was subjected to release treatment, the following first to fifth layers were wound on the mold 2 in order while being wound. The configuration of the first to fifth layers is the same as that of the inclusion box 180. The resin was cured on the mold 2, and after removal from the mold, it was cut into a predetermined length to obtain a sheath tube 220.

(Formation process of the internal rib 170)
The molds 3 and 4 used when molding the internal rib 170 have an L-shape in plan view. The mold 3 is a U-shaped concave female mold, the bottom of the U corresponds to the web 171 of the inner rib 170, and the rising of the U corresponds to the opposing flange A172 and the flange B173. The molds 3 and 4 are different in the direction in which the flange A 172 and the flange B 173 project. After the molds 3 and 4 were subjected to release treatment, the first to fifth layers were sequentially laminated on the molds 3 and 4 while forming the flange A 172 and the flange B 173. The configuration of the first to fifth layers is the same as that of the inclusion box 180. After curing the resin on the mold 3 and removing the mold, burrs and the like were trimmed to obtain a pair of included ribs 170.

(Formation process of horizontal rib 177)
Since the horizontal rib 177 has the same shape as the vertical portion 100 V of the inner rib 170, the horizontal rib 177 was formed using the mold 3.

(Step 2)
The second step is a step of forming the top plate 110 and the front plate 120. The top plate 110 and the front plate 120 were formed as a continuous plate-like member. The forming die 5 for forming the top plate 110 and the front plate 120 is a male die in which a mountain shape is bent. The forming die 5 has a rectangular shape when viewed from the thickness direction, and forms an R shape having a curvature radius of 50 mm at the peak portion (bent portion) when viewed from the direction intersecting the thickness direction.

After the mold 5 is subjected to a mold release treatment, a gel coat of about 500 g / m ^{2 to} 800 g / m ^{2 is} applied to form the top plate 110 and the front plate 120. The layers to the fifth layer were laminated in order. The configuration of the first to fifth layers is the same as that of the inclusion box 180. After curing the resin on the mold 5 and removing the mold, the resin is trimmed to a predetermined size to obtain the continuously extending top plate 110 and front plate 120.

(Third step)
The third step is a step of molding the main body of the L-shaped wall structure 100. The main body of the L-shaped wall structure 100 includes an abutting face plate 300, a bottom plate 130, a back plate 140, a top plate 160, a pair of side plates 150, and a mounting portion 200. The mold 6 used when molding the main body of the L-shaped wall structure 100 forms a U-shaped concave female mold, and when viewed from the first direction X, forms an L-shape, the second direction It has a rectangular shape as viewed from Y and a rectangular shape as viewed from the third direction Z. Further, in the mold 6, a convex inner mold for molding the mounting portion 200 is formed.

After releasing the mold 6, the gel coat is applied to the mold 6 at about 500 [g / m ² ] to 800 [g / m ² ], and the contact face plate 300, bottom plate 130, back plate 140, zenith plate 160 The following first to fifth layers were sequentially stacked on the mold 6 while forming the pair of side plates 150 and the mounting portion 200. The first to fifth layers were laminated in order. The configuration of the first to fifth layers is the same as that of the inclusion box 180. After curing the resin on the mold 6, the following fourth step was performed.

(Step 4)
The fourth step is a step of disposing and joining the containing box 180, the containing rib 170, the lateral rib 177 and the sheath tube 220 to the main body of the L-shaped wall structure 100.

(Arrangement of inner box 180, bonding process)
In the disposition and joining process of the inner box 180, marking was performed on the inner surface of the back plate 140 such that the center of the inner box 180 in the first direction X coincides with the center of the attachment portion 200 in the first direction X. . The open area of the inner box 180 was directed to the direction of the back plate 140 in accordance with the marking, and the contact portion with the back plate 140 was temporarily fixed with a bonding resin. Next, as shown in FIG. 18, the periphery of the contact portion 600 between the inner box 180 and the back plate 140 was overlaid, joined and integrated using a mat MC 450 (610). Specifically, while the mat MC 450 (610) was impregnated with a flame retardant resin, two sheets of the mat MC 450 (610) were stacked to overlay the periphery of the contact portion 600.

(Arrangement of internal rib 170, bonding process)
In the arrangement of the inner rib 170 and the bonding step, the bonding resin is applied to the bottom plate 130 and the back plate 140, the attachment side plate 212, and the box side plate 182 on the arrangement line on which the inner rib 170 is placed.

  Next, as shown in FIGS. 8A and 9B, the flange A 172 and the flange B 173 of the internal rib 170 are disposed such that their tips face outward with the mounting portion 200 interposed therebetween. The flange B 173 is brought into contact with the bottom plate 130 and the back plate 140, and the web 171 is brought into contact with the attachment side plate 212 and the box side plate 182 to be temporarily fixed.

  Next, the mat MC 450 is impregnated with a flame-retardant resin by impregnating the contact portion with the bottom plate 130, the contact portion with the back plate 140, the corner portion with the attachment portion inclined plate 213, and the corner portion with the box inclined plate 183. However, two overlays of this were combined and integrated.

(Arrangement of sheath tube 220, joining process)
The sheath tube 220 is disposed and abutted at a predetermined position between the contact face plate 300 and the mounting portion seat plate 211, and is temporarily fixed with a bonding resin, and a flame retardant resin is applied to a mat MC450 around the contact portion. While impregnating, two overlays of this were bonded and integrated. Further, the lateral rib 177 was also disposed at a predetermined position, and was coupled to and integrated with the main body of the L-shaped wall structure 100.

(Step 5)
In the fifth step, the mat MC450 is laminated on the outer surface of the flange A172, the outer surface of the attachment top plate 210, and the outer surface of the box top plate 181 while the mat MC450 is impregnated with the flame retardant resin. Next, a fiber resin is linearly applied on the mat MC 450, and a glass mat impregnated with the flame retardant resin is placed thereon, and gel coating of the top plate 110 and the front plate 120 molded in the third step is performed. A plurality of metal square pipes were placed in the first direction X with the face up and clamped together with the mold 6. Then, after the resin was cured, it was removed from the mold 6 to obtain an L-shaped wall structure 100.

  Next, in the contact face plate 300 and the attachment portion seat plate 211, the attachment hole 190 is formed by drilling along the inner peripheral surface of the sheath tube 220.

(Performance evaluation of finished product of L-shaped wall structure 100)
The total weight of the L-shaped wall structure 100 thus obtained was 273 kg.

Next, evaluation of bending stiffness was performed as performance evaluation. First, an H-shaped steel was prepared, and this H-shaped steel was used to create a metal frame imitating the elevated bridge 1. Attach the L-shaped wall structure 100 to the metal frame that simulates the viaduct 1, attach the hydraulic cylinder to be level with the ground on the pedestal extending from the metal frame, and attach the load cell to the tip of the hydraulic cylinder rod Attached. Apply a load equivalent to a fluctuating wind load of 1.5 [kN / m ² ] at a position 2.5 m lower in the third direction Z from the zenith plate 160 of the L-shaped wall structure 100 , And evaluated the bending rigidity. As a result, the deflection in the horizontal direction (the second direction Y) at the zenith portion (zenith plate 160) of the L-shaped wall structure 100 is 40 mm, which is less than the target deflection of 50 mm. It turned out that it has the following bending rigidity.

Next, it was found that although a load equivalent to a wind load of 3 [kN / m ² ], which is a design load, was applied, it did not lead to breakage and that it had a necessary bending strength.

Moreover, the natural frequency was measured with reference to JISZ8735: 1981 (vibration level measurement method). Specifically, in a state in which the L-shaped wall structure 100 is attached to the metal frame, a piezoelectric acceleration pickup is attached with a double-sided tape to the central portion of the front plate 120 in the third direction Z. A vibration level meter VA-12 (manufactured by Rion) described in 1955 was connected, and the L-shaped wall structure 100 was struck with a plastic hammer to measure the natural frequency. It was confirmed that this measurement result is 22 [Hz] and not around 2 [Hz] which is the natural frequency to be avoided of the housing. Since the natural frequency is in proportion to the elastic modulus and inversely proportional to the density (= weight), by forming the L-shaped wall structure 100 made of fiber reinforced resin, weight reduction of the structure itself is achieved, which is inappropriate 2 It could be a structure that avoids the natural frequency which is [Hz].

  The present invention is not limited to the embodiment described above, and various modifications can be made as described below without departing from the scope of the present invention.

  In the above embodiment, although the first direction X is the direction in which the rails 2 extend, the second direction Y is the width direction, and the third direction Z is the vertical direction, the first direction X, the second direction Y and the third direction are described. The direction Z is not limited to this, and may be another direction.

  Moreover, the object to which the L-shaped wall structure 100 is attached is not limited to the case of the elevated bridge 1 but may be another structure. For example, it may be a house such as an apartment, a building such as a factory, or any other structure.

  Further, the position at which the contact face plate 300 is attached is not limited to the side surface 3 a of the main girder 3 and may be another position. For example, it may be attached to the bottom or top of a frame such as a beam or a column. The thickness direction of the contact surface plate 300 in this case is the vertical direction (third direction Z). Further, the object to which the L-shaped wall structure 100 is attached may be formed with the projecting portion 4 (projected portion).

  Further, the direction in which the mounting portion 200 is opened is not limited to the bottom plate 130 side, and may be the top plate 110 side, for example.

  In the above embodiment, the vertical portion 100V is disposed to extend upward, but the vertical portion 100V may be disposed to extend downward from the end of the horizontal portion 100H. . Further, the horizontal portion 100H and the vertical portion 100V are not limited to be orthogonal to each other when viewed in the first direction X. For example, the vertical portion 100V may be disposed to be inclined with respect to the horizontal portion 100H.

  DESCRIPTION OF SYMBOLS 1 ... Viaduct, 2 ... Rail, 3 ... Main girder (beam part, frame), 3a ... Side of main girder, 4 ... Splashing part, 5 ... Ground covering part, 6 .. 100 ... L-shaped wall structure, 100 H ... Horizontal portion of L-shaped wall structure (first box-shaped structure), 100 V ... Vertical portion of L-shaped wall structure (second box-shaped structure), 110 ... on Face plate (first face plate) 120 front plate (third face plate) 130 bottom plate (second face plate) 140 back plate (fourth face plate) 150 side plate 160 zenith plate 170 inclusion Rib, 170H: horizontal portion of inner rib, 170 V: vertical portion of inner rib, 171: web, 172: flange A (first flange), 173: flange B (second flange), 174: relief A (first relief) Department), 175 ... escape B (second escape part), 177 ... horizontal rib, 180 ... inclusion box, 181 ... box heaven , 182: box side plate, 183: box inclined plate, 190: mounting hole, 200: mounting portion, 210: mounting portion top plate, 211: mounting portion seat plate, 212: mounting portion side plate, 213: mounting portion inclined plate, 220 A sheath, an opening, an abutment, an abutment face plate, an anchor bolt, a base plate, a washer, a nut, an abutment face plate, a bracket, a mount portion, a mount portion, and a support portion. , 400c: skirt portion, 410: embedded nut, 420: mounting bolt, 430: adjustment bolt (position adjusting portion), 500: apron, 505: blind bolt, 507: concrete inlet, 510: gap plate (closing member) 512: flange portion (first closing plate, second closing plate) 513: web portion 520: gap 53 ... slit.

Claims (13)

An L-shaped wall structure including a main body forming an L-shape when viewed from a first direction,
The body is
A hollow first box-shaped structure extending in a second direction intersecting the first direction;
A hollow second box-shaped structure extending in a third direction intersecting the first direction and the second direction, and forming an L-shape by the one box-shaped structure and the second box-shaped structure;
The first box-shaped structure is
An abutting face plate which constitutes a mounting surface arranged to face the housing and in which a mounting hole is formed;
An attachment portion extending in a second direction from the side opposite to the attachment surface of the contact surface plate;
The mounting portion includes a recess that is recessed inward from the outside in the third direction,
The L-shaped wall structure, wherein the mounting hole is continuous in the second direction and is in communication with the inside of the recess. The mounting portion is
A pair of mounting portion side plates separated in the first direction with the thickness direction as the first direction;
And a mounting portion top plate connecting the pair of mounting portion side plates to each other with the thickness direction as the third direction,
The L-shaped wall structure according to claim 1, wherein the side opposite to the mounting portion top plate in the third direction is open to the outside. The attachment portion includes an attachment portion seat plate facing the contact surface plate in the second direction and in which the attachment hole is formed.
The L-shaped wall according to claim 2, wherein a cylindrical sheath tube extending in the second direction and constituting the mounting hole is disposed between the contact surface plate and the mounting portion seat plate. Structure. The first box-shaped structure is
A first face plate extending in the second direction with the thickness direction as the third direction;
The L-shaped wall according to claim 2 or 3, further comprising: a second face plate extending in the second direction with the thickness direction as the third direction and facing the first face plate in the third direction. Structure.   The L-shaped wall structure according to claim 4, wherein the distance between the first face plate and the second face plate in the third direction is shorter as the distance from the contact face plate is increased in the second direction. The second box-shaped structure is
A third face plate extending in the third direction, with the thickness direction being the second direction;
6. The L-shaped wall according to claim 4, further comprising: a fourth surface plate extending in the third direction with the thickness direction as the second direction and facing the third surface plate in the second direction. Structure. The main body includes a plurality of included ribs forming an L shape when viewed from the first direction,
The plurality of inner ribs are spaced apart in the first direction, and are continuously formed from the first box-shaped structure to the second box-shaped structure.
The internal rib is
A web whose thickness direction is the first direction;
It has a first flange and a second flange as a pair of flanges projecting in the first direction from both end portions in the width direction of the web,
In the first box-shaped structure, the first flange is joined to the first face plate, and the second flange is joined to the second face plate,
The L-shaped wall structure according to claim 6, wherein in the second box-shaped structure, the first flange is joined to the third face plate, and the second flange is joined to the fourth face plate. The second box-shaped structure includes an inclusion box disposed in correspondence with the position of the attachment portion in the first direction,
The inclusion box is
A pair of box side plates spaced in the first direction with the thickness direction as the first direction;
And a box top plate that abuts against the third face plate between the pair of box side plates, with the thickness direction being the second direction,
The inner rib is disposed across the inner box and the attachment portion in the first direction,
The L-shaped wall structure according to claim 7, wherein the web is joined to the box side plate and to the attachment side plate. The web is
A first relief portion having a concave shape that forms a gap between the second face plate and the attachment portion side plate at the corner portion between the second face plate and the attachment portion side plate;
The L-shaped wall structure according to claim 8, further comprising: a second relief portion which is a concave shape that forms a gap between the third side plate and the box side plate, which forms a gap between the third side plate and the box side plate.   The L-shaped wall structure according to any one of claims 1 to 9, wherein the main body is made of FRP. A bracket extending outwardly from the second box structure in the second direction;
The L-shaped wall structure according to any one of claims 1 to 10, wherein the bracket is provided with a position adjustment portion capable of adjusting the position of the main body in the third direction. A closing member disposed to cover a gap between the adjacent main bodies in the first direction;
The closing member is
A first closing plate extending in the vertical direction which is the third direction and covering the gap from the second direction;
The L-type according to any one of claims 1 to 11, further comprising: a second closing plate bent in the second direction from the first closing plate and in contact with the top plate of the second box-shaped structure. Wall structure.   The L-shaped wall according to any one of claims 1 to 12, wherein the thickness direction of the contact surface plate is the second direction, and the contact surface plate is disposed to be opposed to the side surface of the housing. Structure.

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