JP3720030B2 - Manufacturing method of expansion joint for road bridge - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a process for the production of expansion joints for road bridges.
[0002]
[Prior art]
As shown in FIG. 7, the road bridge expansion joint includes a pair of corrugated plates 1 and 1 extending in a zigzag manner in the longitudinal direction of the seam of the road bridge, and the pair of corrugated plates 1 and 1 It is known that the projections are arranged so as to face each other and are combined so as to form a wavy gap 2 therebetween. In the gap 2, a water stop member 3 formed by molding a rubber plate into a groove shape is interposed, and in the groove of the water stop member 3, liquid rubber, urethane is used to ensure dustproof and soundproof properties. Sealing material 4a such as foam and iron ore is filled (see Non-Patent Document 1).
[0003]
[Non-Patent Document 1]
"Expanding device standard for bridges Vol. IV" Japan Road Joint Association January 2000 [6-3]
[0004]
[Problems to be solved by the invention]
However, in the above-mentioned expansion joint for road bridge, when the space 2 becomes wide due to expansion of the space 12 due to the temperature change of the road bridge bodies 10, 10, the sealing material 4 a cannot allow the expansion and contraction. There was a problem that the sealing material 4a was peeled off from the water-stopping member 3 to impair the dustproof property. Further, when the gap 2 between the corrugated plates 1 and 1 is narrowed, the seal material 4a cannot allow the expansion and contraction, and the seal material 4a jumps out of the gap 2 to the surface of the road bridge and is damaged by being stepped on the wheel. was there.
[0005]
That is, an object of the present invention aims to provide a manufacturing method of a road bridge for telescopic joint hand to ensure dust resistance and durability.
[0006]
[Means for Solving the Problems]
In view of the above problems, the present invention uses an injection-type foam sealing material as the sealing material, and forms a corrugated groove or cut extending in a zigzag manner in the longitudinal direction of the seam of the road bridge. Thus, the corrugated plate is allowed to expand or contract by the corrugated grooves or cuts.
[0007]
That is, the invention according to claim 1, so as to straddle the Joint Gap sides of the road bridge body of road bridges seam portion, or manufacture of road bridge for expansion joints to be bridged so as to straddle on the Joint Gap sides of road bridge body and abutments A method,
A pair of corrugated plates that bend and extend zigzag in the longitudinal direction of the seam of the road bridge are arranged with the concave and convex portions facing each other, forming a corrugated gap between them,
A water stop member formed into a groove shape is interposed between the wavy play of the above waveform,
Corrugated formwork provided with a formwork plate extending in a zigzag manner in the longitudinal direction of the seam of the road bridge corresponding to the irregularities of the corrugated board, and a support plate attached so as to cross the formwork plate, The support plate is laid on both sides of the corrugated play so as to straddle the corrugated play, and the mold plate of the corrugated form is positioned at the approximate center of the groove of the water stop member, and suspended.
Filling the groove of the water-stopping member with an injection-type foam sealing material,
The corrugated mold is removed after the foaming and curing of the pouring foam sealing material.
[0008]
Therefore, according to the present invention, the corrugated formwork plate is suspended substantially at the center of the groove of the water-stopping member, and the injection-type foamed sealing material is filled in the groove of the water-stopping member, and the injection-type foaming is performed. Since the corrugated formwork is removed after foaming and hardening of the sealing material, the corrugated groove extending in a zigzag manner in the longitudinal direction of the seam of the road bridge corresponding to the unevenness of the corrugated plate It is formed in an injection-type foamed sealing material, which is advantageous in allowing expansion and contraction between the corrugated plates. That is, when the corrugated groove is opened when the play is expanded, the peeling force applied to the adhesive surface between the water-stopping member and the injection-type foamed sealing material is reduced, and the injection-type foaming sealing material is peeled off from the water-stopping member. Thus, it can be prevented that the dustproofness is impaired. Further, when the gap is reduced, the injection type foamed sealing material does not jump out from the gap to the road bridge surface. Thereby, the dustproof property and durability of this water stop member can be ensured.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0010]
In FIG. 1, 10 is a road bridge body (concrete floor slab), 11 is a pavement forming the road surface of the road bridge body 10, 12 is a gap between the road bridge bodies 10, 13 is an expansion joint provided so as to close the gap 12, 14 is a notched step formed at the end of the road bridge body 10 and lower than the road surface for installing the expansion joint 13, and 15 is a post-cast concrete that is placed on the notch step 14 to form the road surface.
[0011]
The expansion joint 13 includes a pair of corrugated plates 1, 1 to be described later, a water stop member 3 and an injection-type foamed sealing material 4 provided in the gap 2 between the corrugated plates 1, 1, and the corrugated plates 1, 1. And a plurality of anchor bolts 5 (shown in FIG. 2) provided on the back surface.
[0012]
The corrugated plates 1, 1 extend in a zigzag manner in the longitudinal direction of the seam of the road bridge, and are disposed with their concave and convex portions facing each other, and a corrugated gap 2 is formed therebetween. Further, a water stop member 3 having a rubber plate as a groove shape is interposed in the gap 2, and both ends of the water stop member 3 are respectively disposed on the side surfaces of the pair of corrugated plates 1, 1 on the side of the gap 2. It is fixed. Moreover, in order to allow expansion and contraction due to temperature changes of the road bridge main bodies 10, 10, that is, expansion / reduction of the gaps 12, the water-stopping member 3 is provided with an injection-type foam sealing material 4 in order to ensure dustproof and soundproof properties Filled. The injection type foamed sealing material 4 has a corrugated groove extending in a zigzag manner in the longitudinal direction of the seam of the road bridge so as to correspond to the irregularities of the corrugated plates 1, 1. 6 is formed.
[0013]
The injection-type foamed sealing material 4 is preferably made of a material having a stretching property such that the tensile stress is 1.0 MPa or less and the elongation is 50% or more, and the compressive stress is 1.0 MPa or less and the compression rate is 50% or more. . For example, in this embodiment, foamed rubber foam is used.
[0014]
As shown in FIG. 2 or 3, a plurality of straight rod shapes and anchor bolts 5 that are bent in a downward direction and formed in a substantially L shape are welded to the back surface of the corrugated plates 1 and 1. The anchor bolt 5 is disposed so as to intersect with the U-shaped line 16 and the through line 17 that are pre-planted in the notch step part 14, and the intersecting part is welded so that the anchor bolt 5 is connected to the notch step part. It is fixed to the part 14. And the corrugated board 1 and 1 are installed in the road bridge main bodies 10 and 10 by placing the post-cast concrete 15 on the notch step portion 14 so as to be substantially flush with the upper surface of the corrugated board 1. Yes.
[0015]
Next, a method for manufacturing the expansion joint 13 of the present embodiment form state.
[0016]
As shown in FIG. 4, at a manufacturing plant, a pair of corrugated plates 1, 1 with a plurality of anchor bolts 5, 5,... Welded to the back are arranged with their concave and convex portions facing each other. And a gap 2 is formed between them. And the water stop member 3 is interposed in the gap 2.
[0017]
Next, a mold plate 20a extending in a zigzag manner in the longitudinal direction of the seam of the road bridge corresponding to the corrugations of the corrugated plates 1 and 1, and a plurality of support plates 20b attached crossing the mold plate 20a. , 20b,..., 20b,..., 20b,..., 20b, and so on, so that the plurality of support plates 20b, 20b,. 1, and the mold plate 20 a is positioned and suspended at the approximate center of the groove of the water stop member 3.
[0018]
Next, an injection-type foamed sealing material 4 (shown in FIG. 6) is filled into the groove of the water-stopping member 3 from the gap between the mold plate 20a and the corrugated plates 1 and 1. Then, the corrugated mold 20 is removed after the injection-type foamed sealing material 4 is foam-cured. Here, since the injection-type foamed sealing material 4 rises from the top surface of the corrugated plates 1, 1 due to the foaming, the injection-type foamed sealing material 4 is substantially flush with the top surface of the corrugated plates 1, 1. Cut and remove the raised part.
[0019]
By the above manufacturing method, as shown in FIG. 6, the corrugation extending substantially zigzag in the longitudinal direction of the seam of the road bridge at the center of the groove of the water stop member 3 corresponding to the unevenness of the corrugated plates 1, 1. The expansion joint 13 in which the groove 6 is formed in the injection type foaming sealing material 4 is completed.
[0020]
In the present embodiment, the filling foam sealing material 4 is filled in the manufacturing plant. However, the present invention is not limited to this, and after the corrugated plates 1 and 1 are installed in the construction site, the corrugated mold 20 May be constructed so as to perform the filling operation of the injection-type foamed sealing material 4.
[0021]
【The invention's effect】
According to the invention of claim 1, suspended from the mold plate waveform formwork substantially at the center of the groove of the waterproofing member, filling the injection type foam sealant in the groove of該止water members, said injection Since the corrugated formwork is removed after the foam-cured sealing material has been foam-cured, the corrugated groove extending in a zigzag manner in the longitudinal direction of the seam of the road bridge corresponding to the irregularities of the corrugated plate Is formed in the injection-type foamed sealing material, which is advantageous in allowing expansion and contraction between the corrugated plates. That is, when the corrugated groove is opened when the play is expanded, the peeling force applied to the adhesive surface between the water-stopping member and the injection-type foamed sealing material is reduced, and the injection-type foaming sealing material is peeled off from the water-stopping member. Thus, it can be prevented that the dustproofness is impaired. Further, when the gap is reduced, the injection type foamed sealing material does not jump out from the gap to the road bridge surface. Thereby, the dustproof property and durability of this water stop member can be ensured.
[Brief description of the drawings]
1 is a perspective view showing a road bridge joint portion structure according to an exemplary shape condition of the present invention.
2 is a cross-sectional view showing a road bridge joint portion structure according to an exemplary shape condition of the present invention.
Figure 3 is a plan view showing a road bridge joint portion structure according to an exemplary shape condition of the present invention.
Perspective view illustrating the method of manufacturing the expansion joint in accordance with an exemplary type state of the present invention; FIG.
Figure 5 is a perspective view showing a state in which bridged the waveform formwork in Joint Gap expansion joint according to the exemplary shaped state of the present invention.
Perspective view showing an expansion joint according to the exemplary shaped state of the present invention; FIG.
FIG. 7 is a perspective view showing a conventional road bridge joint structure.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Corrugated board 2 Spacing 3 Water-stop member 4 Injection type foam sealing material 4a Sealing material 5 Anchor bolt 6 Corrugated groove 10 Road bridge main body 11 Pavement 12 Spacing 13 Expansion joint 14 Notch step part 15 Post-concrete concrete 16 U-shaped bar 17 Thread 20 corrugated formwork 20a formwork plate 20b support plate

Claims (1)

A method for manufacturing an expansion joint for a road bridge constructed so as to straddle the road bridge body on both sides of the gap of the road bridge joint, or across the road bridge body and abutment on both sides of the gap,
A pair of corrugated plates that bend and extend zigzag in the longitudinal direction of the seam of the road bridge are arranged with the concave and convex portions facing each other, forming a corrugated gap between them,
A water stop member formed into a groove shape is interposed between the wavy play of the above waveform,
Corrugated formwork provided with a formwork plate extending in a zigzag manner in the longitudinal direction of the seam of the road bridge corresponding to the irregularities of the corrugated board, and a support plate attached so as to cross the formwork plate, The support plate is laid on both sides of the corrugated play so as to straddle the corrugated play, and the mold plate of the corrugated form is positioned at the approximate center of the groove of the water stop member, and suspended.
Filling the groove of the water-stopping member with an injection-type foam sealing material,
A method for manufacturing an expansion joint for road bridges, wherein the corrugated formwork is removed after foaming and hardening of the injection-type foamed sealing material.

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