JPS6032164Y2 - Watertight device at expansion joints of bridges - Google Patents

Description

[Detailed description of the invention] This invention relates to a watertight device provided at an expansion joint of a bridge.

Conventionally, this type of expansion joint is equipped with a drainage system consisting of a drain plate and a drainage gutter to dispose of rainwater debris, but this drainage system can clog the drainage gutter with debris and mud in a short period of time. However, there was a drawback that rainwater leaked below the bridge.

For this reason, water is not currently treated in this area, and instead a watertight device is used, which has a U-shaped gutter filled with a stopper.

However, in this case, there is no problem if the bridge axis line and the bridge end line are perpendicular, but if there is an oblique angle between the bridge axis line and the bridge end line, such as in a diagonal bridge or a curved bridge, when the bridge expands or contracts, the said machine , displacement occurs in the cross-sectional direction, and at the same time, displacement also occurs in the direction of the horizontal edge line.

For this reason, with a normal gutter, there was a risk that the gutter would be twisted or hit the rigid plate of the expansion/contraction device and be destroyed.

This invention was devised to eliminate the above-mentioned drawbacks, and the purpose is to provide a watertight device for expansion joints of bridges that can absorb displacement in two directions: the bridge axis direction and the lateral end line direction. It is.

Embodiments of this invention will be described below with reference to the drawings.

FIG. 1 is a plan view showing a movement situation due to expansion and contraction of a curved bridge, and FIG. 2 is a plan view showing a movement situation due to expansion and contraction of a diagonal bridge.

As shown in the figure, along with the displacement amount Δ1, a displacement Δd in the cross-sectional direction and a displacement ΔS in the direction perpendicular to the cross-section occur in the gutter.

Although a U-shaped gutter is easy to deform in the cross-sectional direction, it is difficult to deform in the direction perpendicular to the cross-section, and there is a risk of twisting or breaking.

Therefore, it is necessary for such a joint part insert to be able to deform in a direction perpendicular to the cross section, and to satisfy conventional watertightness.

Figures 3 and 4 show an embodiment of the present invention.
In the figure, 1 is a horizontal end member installed at an expansion joint of a curved bridge or a diagonal bridge, 1a is an upper flange thereof, and 2 is an upper flange portion 1 of this.
This is a face plate that is fixed onto the upper part of the face plate with high-strength bolts 3.

In the present invention, a stainless steel plate or a copper plate with a thickness of about 1Wt is made of a material with a U-shaped cross section so that it can be inserted into the gap S of the expansion joint of a bridge, and the upper edge of the U-shape is attached to the outer side. A flange portion 4a extending to the flange portion 4a is provided, and a bent portion 4C is provided on each side wall portion 4b of the U-shape.
is provided to form a gutter-like member 4, and the flange portion 4a of this gutter-like member 4 is fixed with a high-strength bolt 3 inserted between the upper flange 1a of the bridge joint part and the face plate 2, and this gutter-like member A back-up material 5 such as foam rubber is filled at the bottom of the tube 4, and an elastic sealing material such as butadiene, silicone, urethane rubber or the like is filled at the top.

Since the present invention is configured as described above, the curved portion 4d of the gutter-like member 4 absorbs the displacement Δd in the bridge axis direction, and the bent portion of the gutter-like member 4 absorbs the displacement ΔS in the cross-sectional direction. 4c
absorbs this.

According to experiments, the displacement ΔS in the cross-sectional direction can be sufficiently absorbed by the bending of the bent portion 4c up to an oblique angle of 80°.

The bottom part of the gutter-like member 4, which has a U-shaped cross section, is filled with a back-up material 5 such as a flexible foam rubber.
Since the upper part thereof is filled with an elastic sealing material 6 such as rubber, it is possible to sufficiently follow the above-mentioned displacement, and the sealing of the expansion joint is also ensured.

Since this idea is as described above, it can be used for expansion joints with oblique angles such as curved bridges and diagonal bridges, and can sufficiently absorb displacement in two directions: the bridge axis direction and the lateral end line direction. This has the excellent effect of making the joint watertight.

[Brief explanation of drawings]

Figures 1 and 2 are plan views schematically showing the expansion and contraction states of curved bridges and diagonal bridges, Figure 3 is a plan view of the expansion joint of the bridge equipped with the device of the present invention, and Figure 4 is the vertical view of the bridge. FIG. 1... Horizontal end member provided at the expansion joint of the bridge, 1
a...Top flange, 2...Face plate, 3...High strength bolt, 4...
・Gutter-like member, 4a...Flange part, 4b...
...Both side wall parts, 4c...Bending part, 4d...
...Curved portion, 5...Backup material, 6...
...Elastic sealing material.

Claims (1)

[Scope of utility model registration request] Flange portions extending outward are provided on the upper edges of the U-shaped cross section that can be inserted into the gaps of the expansion joints of the bridge, and bent portions are provided on both side walls of the U-shape, so that the gutter-like member The flange part is fixed by inserting the upper flange of the bridge joint between the face plates.The bottom of this gutter-like member is filled with a back-up material such as foam rubber, and the upper part is filled with an elastic sealing material such as rubber. Watertight device at expansion joints of bridges.