JP2007315090A - Installation method and installation structure of expansion/contraction device for bridge - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an installation method and an installation structure of an expansion/contraction device for a bridge, made executable in a short time by simplifying installation work. <P>SOLUTION: Anchoring parts 7 and 7 are projected in advance in an end part of opposed respective bridges 10 and 10. The expansion device 1 for the bridge is placed on an upper surface of these anchoring parts 7 and 7. A fixing bolt 6a vertically inserted into installation holes 4a and 4a of both end installation parts 4 and 4 and through-holes 7b and 7b of the anchoring parts 7 and 7 of the expansion device 1 for the bridge, is engaged with a fixing nut 6b, and the expansion device 1 for the bridge is fixedly fastened to the anchoring parts 7 and 7. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a mounting method and a mounting structure for a bridge extension device, and more particularly, to a mounting method and a mounting structure for a bridge extension device that can be installed in a short time.

  An expansion / contraction device is installed at a joint of a bridge such as a road bridge in order to absorb the expansion and contraction of the bridge due to temperature change. Various types of expansion / contraction devices have been proposed (see, for example, Patent Document 1), and a conventional expansion / contraction device 16 has attachment portions 4, 4 at both ends of a base portion 3, as illustrated in FIGS. Anchor bars 8 and 8 extending in the longitudinal direction of the bridges 10 and 10 are provided on the lower surfaces of the attachment portions 4 and 4, and anchor plates 9 and 9 extending in the longitudinal direction of the bridges 10 and 10 are provided on the side surfaces of the attachment portions 4 and 4. The bridges 10 and 10 are provided at predetermined intervals in the width direction. A reinforcing plate 2b is embedded in the upper surface of the base portion 3, and the surface rubber portion 2 having a plurality of grooves 2a is fixed.

  In order to attach the expansion / contraction device 16, first, the expansion / contraction device 16 is bridged between the opposing bridges 10, 10, and the anchor bars 8, 8 and the anchor plates 9, 9 and the floor slab 11 of the bridges 10, 10 are arranged. , 11, a plurality of reinforcing reinforcing bars 13 are arranged on a U-shaped floor slab embedded reinforcing bar 12 partially embedded, and each of them is joined to the reinforcing reinforcing bar 13 by welding or the like. Next, post-cast concrete 14, 14 was placed on the floor slabs 11, 11, and paving materials 15, 15 were laid in succession to the post-cast concrete 14, 14.

As described above, the conventional expansion and contraction device 16 has a problem that the reinforcing bar reinforcing work, welding work, post-casting concrete placing work, and the like are necessary, and the work is complicated. Therefore, there was a limit to shortening the construction period.
Japanese Patent Laid-Open No. 5-148811

  An object of the present invention is to provide a mounting method and a mounting structure for a bridge expansion / contraction device that can be mounted in a short time by simplifying the mounting operation.

  In order to achieve the above object, the mounting method of the bridge expansion / contraction device of the present invention is a mounting method of a bridge expansion / contraction device installed between a bridge and a fixing portion at each opposing end of the bridge. And the bridge expansion and contraction device is placed on the fixing portion and fixed by fastening means.

  Further, the mounting structure of the bridge extension device according to the present invention is a mounting structure of a bridge extension device installed between the bridges, and a fixing portion protruding from each opposite end portion of the bridge. The bridge expansion and contraction device placed on the fixing portion is fixed by fastening means.

  According to the present invention, the bridge expansion and contraction device can be mounted by mounting the bridge expansion and contraction device on the fixing portions protruding from the opposite ends of the bridge and fixed by the fastening means. Reinforcing bar reinforcement work, welding work, post-placed concrete placement work, etc. are unnecessary, and the work can be simplified. Therefore, it is possible to perform the installation work of the bridge extension device in a short time.

  Hereinafter, a mounting method and a mounting structure of a bridge extension device according to the present invention will be described based on the embodiments shown in the drawings. In addition, the same code | symbol is used about the same component as the attachment structure of the conventional expansion-contraction apparatus 16 for bridges shown in FIG.

  As illustrated in FIGS. 1 and 2, the bridge expansion / contraction device 1 (hereinafter referred to as the expansion / contraction device 1) used in the present invention includes a reinforcing plate 2 b embedded in the upper surface of the base portion 3 to form a plurality of zigzag grooves 2 a. The provided surface rubber portion 2 is fixed, and has mounting portions 4 and 4 at both ends of the base portion 3. Each attachment portion 4, 4 is provided with attachment holes 4 a penetrating vertically in the longitudinal direction of the telescopic device 1 (vertical direction in FIG. 1) at a predetermined interval. A fixing bolt 6a that is screwed into the fixing nut 6b is inserted into the mounting hole 4a.

  Between the mounting hole 4a and the mounting hole 4a adjacent to each other in the longitudinal direction of the expansion / contraction device 1, the mounting portion 4 has a T-shape with protrusions protruding in the longitudinal direction at every other interval. A plurality of engagement holes 5 are formed in the lower surface of the. The engagement holes 5 and 5 arranged in parallel in the longitudinal direction of the telescopic device 1 of each of the attachment portions 4 and 4 are between the engagement holes 5 and 5 that face each other in the planar direction (plan view). It is arranged to be located.

  The expansion / contraction device 1 is installed in a free space that is a joint between the bridge 10 and the bridge 10 illustrated in FIGS. Each bridge 10, 10 has a fixing portion 7, 7 embedded on one side in the floor slabs 11, 11 of each bridge 10, 10 and projecting the other side in the horizontal direction. 3 are arranged in parallel in the vertical direction). The fixing portions 7 and 7 projecting from the respective bridges 10 and 10 are configured such that the projecting side end portion has a substantially triangular shape in a plan view, and the fixing portion 7 and the fixing portion 7 facing each other in a planar direction (plan view). The pavement materials 15 and 15 are laid on the upper surface.

  The upper surface of the projecting side end of the fixing unit 7 is provided with an engaging projection 7a projecting upward, and the planar shape of the engaging projection 7a is formed in a T shape having a projecting portion projecting in the width direction of the bridge 10. Has been. Through holes 7b and 7b penetrating vertically are provided at positions on both sides of the engaging projection 7a on the upper surface of each fixing unit 7.

  As illustrated in FIGS. 5 and 6, the expansion / contraction device 1 illustrated in FIGS. 1 and 2 is installed in the gap between the bridge 10 and the bridge 10. The expansion device 1 is attached by first placing the expansion device 1 across the fixing portions 7 and 7 that are projected in advance at the opposite ends of the bridges 10 and 10. At this time, the engaging holes 5 and 5 of the telescopic device 1 are externally engaged with the engaging protrusions 7a and 7a on the upper surfaces of the fixing portions 7 and 7, respectively. This engagement allows temporary fixing between the bridge 10 and the bridge 10 without shifting the position of the telescopic device 1. The planar shape of the engagement protrusion 7a is preferably a shape having a protrusion protruding in the width direction of the bridge 10, and by using such a shape, not only the width direction of the bridge 10 but also the longitudinal direction (FIG. 5). Then, the deviation in the left-right direction) can be reliably suppressed.

  Next, the fixing bolts 6a and 6a are inserted into the mounting holes 4a and 4a of the mounting portions 4 and 4 at both ends of the telescopic device 1 and through holes 7b and 7b of the fixing unit 7 provided at positions corresponding to the mounting holes 4a and 4a. And screwed into the fixing nut 6b. As a result, the telescopic device 1 can be fastened and fixed to the fixing portions 7 and 7 and attached between the bridge 10 and the bridge 10.

  In this way, if the fixing portions 7 and 7 are previously provided at the opposite ends of the bridges 10 and 10, the expansion device 1 is attached to the fixing portions 7 and 7 by the fastening means of the fixing bolt 6a and the fixing nut 6b. Since it can be fixed easily, conventional work such as reinforcing bar reinforcement work, welding work, post-cast concrete placing work, etc. is not required, and the work can be simplified. Therefore, it is possible to perform the attaching operation of the expansion / contraction device 1 in a short time, and it becomes easy to reduce the construction cost by reducing the auxiliary materials and the work period.

  Further, not only when the telescopic device 1 is first installed between the bridges 10, but also when replacing the telescopic device 1 installed, it is quick and easy by loosening and removing the fastening bolt 6a and the fixing nut 6b. It is possible to perform replacement work.

  If the expansion / contraction device 1 and the fixing unit 7 can be temporarily fixed, the engagement hole 5 of the expansion / contraction device 1 and the engagement protrusion 7a provided on the upper surface of the fixing unit 7 are not limited to other shapes that engage with each other. For example, an engagement protrusion may be provided in the telescopic device 1, and an engagement hole that engages with the engagement protrusion may be provided on the upper surface of the fixing unit 7.

  Further, the fixing portion 7 can be obtained at a low cost, light weight and high strength by processing a so-called H steel material having an H-shaped cross section. The shape of the fixing unit 7 is not limited to that exemplified in the above embodiment, but as shown in FIGS. 3 and 4, the protruding side end of the fixing unit 7 is triangular in plan view and side view. It is possible to reduce the weight while securing sufficient strength.

  Further, the fixing units 7 and 7 projecting from the respective bridges 10 and 10 are arranged so as to be positioned between the fixing unit 7 and the fixing unit 7 facing each other in the planar direction, thereby expanding and contracting the apparatus with high stability. 1 can be placed, and a predetermined gap length of the bridges 10 and 10 can be secured.

  7 and 8 illustrate another embodiment of the mounting structure of the telescopic device 1 of the present invention. In this embodiment, the shape of the fixing unit 7 is H-shaped in plan view. In the H-shaped fixing portion 7, the T-shaped end portion on the side protruding from the bridge 10 functions as the engaging protrusion 7 a as it is. T-shaped engagement holes 5 and 5 are formed in the attachment portions 4 and 4 at both ends of the telescopic device 1 so as to engage with the engagement protrusions 7a, and the engagement holes 5 are formed in the engagement protrusions 7a and 7a. 5 has a structure that fits outside.

  A screw hole 6c is formed at a position corresponding to the attachment hole 4a of the expansion device 1 on the upper surface of the fixing unit 7. Therefore, as in the previous embodiment described above, the expansion bolt 1 is inserted into the screw hole 6c by screwing the fixing bolt 6a inserted through the mounting hole 4a without the need for the fixing nut 6b. It can be fastened and fixed.

  As described above, as long as the expansion / contraction device 1 and the fixing portions 7 and 7 can be fastened and fixed, not only the fixing bolt 6a and the fixing nut 6b but also other fastening means can be used.

  In this embodiment, since the so-called H steel material can be used as the fixing portion 7 as it is, the processing cost and processing time of the member can be further reduced.

It is a top view which illustrates the expansion-contraction apparatus for bridges used for this invention. It is AA sectional drawing of FIG. It is a top view which illustrates the idle part of the bridge which installs the expansion-contraction apparatus for bridges of FIG. FIG. 4 is a side view of FIG. 3. It is a top view which illustrates the attachment structure of the expansion-contraction apparatus for bridges of this invention. It is BB sectional drawing of FIG. It is a top view which illustrates the attachment structure of another expansion-contraction apparatus for bridges of this invention. It is CC sectional drawing of FIG. It is a top view which illustrates the attachment structure of the conventional expansion-contraction apparatus for bridges. FIG. 10 is a perspective side view of FIG. 9.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bridge expansion / contraction apparatus 2 Surface rubber | gum part 2a Groove 2b Reinforcement plate 3 Base part 4 Attachment part 4a Attachment hole 5 Engagement hole 6a Fixing bolt 6b Fixing nut 6c Screw hole 7 Fixing part 7a Engagement protrusion 7b Through-hole 8 Anchor bar 9 Anchor plate 10 Bridge 11 Floor slab 12 Floor slab embedded reinforcement 13 Reinforcement reinforcing bar 14 Post-cast concrete 15 Pavement material 16 Conventional telescopic device

Claims (7)

  A method for attaching a bridge extension device installed between a bridge, wherein a fixing portion is projected in advance at each of the opposing ends of the bridge, and the bridge extension device is provided at the fixing portion. A mounting method for a bridge extension device that is placed and fixed by fastening means.   2. When the bridge expansion / contraction device is placed on the fixing portion, an engagement portion provided on an upper surface of the fixing portion and an engagement portion provided on the bridge expansion / contraction device are engaged and temporarily fixed. The mounting method of the expansion device for bridges of description.   A mounting structure for a bridge extension device installed between a bridge, a fixing portion protruding from each opposite end of the bridge, and the bridge extension device placed on the fixing portion, A mounting structure for a bridge expansion and contraction device, which is configured by fixing by means of fastening means.   The attachment structure of the bridge extension / contraction apparatus according to claim 3, wherein an engagement part on an upper surface of the fixing part is engaged with an engagement part of the bridge extension / contraction apparatus.   The engaging portion on the upper surface of the fixing portion protrudes upward, and the planar shape is formed as an engaging protrusion having a protruding portion protruding in the width direction of the bridge, and the engaging portion of the expansion device for the bridge is engaged. The mounting structure for a bridge expansion and contraction device according to claim 4, wherein the mounting structure is formed in an engagement hole that fits outside the protrusion.   The mounting structure of the expansion device for a bridge according to any one of claims 3 to 5, wherein the fixing portion is formed of an H steel material having an H-shaped cross section.   The fixing unit is arranged in parallel with each of the bridges at an interval in the width direction, and the fixing unit of each bridge is arranged between the fixing unit and the fixing unit facing each other in a plane direction. The mounting structure of the expansion device for bridges according to any one of 6.

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