JPH08134851A - Wall structure of bridge - Google Patents

Abstract

PURPOSE: To prevent the generation of noise and the occurrence of environmental pollution and to ensure safety of a traveling vehicle and safety of a bridge body against strong wind. CONSTITUTION: A number of opening parts 4 are formed in each of the sides of walls 1 erected in the vicinity of the two sides of a floor system 2 and a cover 3 opening inward is supported by a rotary spring 5 attached to the hinge part of the upper edge. When side wind 8 becomes strong, the cover 3 is opened inward to a position where the cover is balanced with the force of a rotary spring 5. This constitution relieves the wind load of the wall.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in the wall structure of a soundproof wall or a windproof wall in a bridge which travels or moves by various vehicles and pedestrians.

[0002]

2. Description of the Related Art FIG. 6 is a perspective view showing a conceptual structure of a conventional bridge having a wall, and a plurality of main girders 0 extending in the bridge axis direction.
Walls 01 are erected close to both ends of a floor slab 02 placed on 10, and the wall may be a solid material of a homogeneous material or a mixed material, or a net material may be used. In all cases, the wall surface aperture ratio is constant.

[0003]

By the way, in recent years, the soundproof wall and the windbreak wall of this type of bridge have become huge, and the wind load applied to the bridge body becomes enormous.
There are various obstacles in construction.

In particular, the dynamic aerodynamic influence on the bridge is the most important condition when selecting the bridge type, and has a great influence on the construction cost.

Further, the higher the filling rate of the material forming the windbreak wall is, the greater the effect of reducing the wind speed is. However, at the boundary of the installation section, the wind speed greatly changes with respect to the traveling vehicle, which may lead to unstable running. .

An object of the present invention is to provide a new bridge wall structure that solves the above-mentioned problems of the prior art.

[0007]

As a structure for achieving the above object, a bridge wall structure of the present invention is a wall structure in which a side end portion on a deck of a bridge is erected in the bridge axial direction. ,
It is characterized in that a part of the wall is provided with a ventilation opening whose opening area can be changed according to the magnitude of the lateral wind.

[0008]

In the wall structure of the present invention having the above structure,
In the case of a soundproof wall, at low wind speeds, the openings (windows) that open in part of the wall (for example, at multiple locations) are closed, and the ventilation windows are configured to open when the cross wind approaches the design wind speed. In case of low wind speed, part of the wall (for example, multiple places)
The opening (window) that is open to the side is open, and if the crosswind wind speed increases to the extent that it interferes with safe driving of vehicles or walking of pedestrians, the opening ratio of the window becomes smaller, and the wind speed becomes higher and When the wind speed causes safety concerns, a part of the wall inclines and the ventilation port is constructed to let the wind escape upward.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a bridge wall according to a first embodiment of the present invention, FIG. 2 is an enlarged view of part A of FIG. 1, and FIG. 4 is a sectional view showing an operation explanation of the same embodiment.

These figures show an embodiment in which the present invention is applied to a soundproof wall. In FIGS. 1 and 2, a large number of openings 4 are formed on the side surface of the wall 1 which is erected near both ends of the floor slab 2. Is provided
A lid 3 that opens inward is supported by a rotary spring 5 attached to a hinge portion at its upper edge. Note that 10 is a main girder, and a plurality of girders are provided in the bridge axis direction of the bridge.

Further, the sectional view shown in FIG. 4 shows a state in which the lid 3 is opened toward the inside by the wind 8 to a position balanced with the reaction force of the rotary spring 5.

Next, a second embodiment of the present invention will be described. FIG. 3 is a perspective view of the same embodiment, and FIG. 5 is a sectional view for explaining the operation of FIG. The embodiment shows a case where the present invention is applied to a windbreak wall.

In FIGS. 3 and 5, a movable wall 6 that opens inward with a lower side as a hinge is provided in a wall 1 standing on a floor slab 2, and a plurality of openings 4 are provided in the movable wall 6. A lid 3 is attached which opens outward with the provided lower edge as a hinge.

The movable wall 6 and the lid 3 are both set so that the hinges thereof are fitted with the rotary springs 5 or other spring systems so as to have an aperture ratio according to the wind speed.

In the case of this embodiment, since it is a windbreak wall,
If the wind speed of the side wind 8 received by the wall becomes large, it will hinder the running of the vehicle, so close the lid 5, and if the wind speed becomes higher, the wind load on the windbreak wall will cause a problem on the strength of the bridge. The wall 6 tilts, and the side wind 8 escapes in the direction of the arrow shown by the dotted line 9 to reduce the wind load on the wind barrier. In this case, since the wind entering the inside faces upward, there is no problem in traveling of the vehicle traveling in the windbreak wall, and the role of the windbreak wall can be sufficiently fulfilled.

Although the embodiments of the present invention have been briefly described above, the present invention is not limited to the above embodiments, and various design changes can be made within the scope of the technical idea of the present invention, and any of them can be applied to the present invention. Belong to the technical scope.

[0017]

EFFECTS OF THE INVENTION According to the present invention, in a wall structure which is erected at a side end portion on a floor slab of a bridge, a ventilation opening whose opening area can be changed according to the magnitude of cross wind is provided in a part of the wall. By providing the lid, the lid can be opened (in the case of a soundproof wall) or closed (in the case of a soundproof wall) as the wind speed increases, so that the wind load on the wall can be maintained without impairing the purpose of the soundproof wall or windbreak wall of the bridge. Since it can be reduced, the installation of walls is not the deciding condition for bridge type selection as in the past.

In the case of a soundproof wall, a strong wind blows through the opening, so that the leakage of noise from here is small and only temporary, so there is little problem in terms of pollution, and in the case of a windbreak wall. It is possible to ensure the safety of the vehicle running and also the safety of the bridge body in strong wind.

[Brief description of drawings]

FIG. 1 is a perspective view of a bridge wall according to a first embodiment of the present invention.

FIG. 2 is an enlarged view of part A in FIG.

FIG. 3 is a perspective view of a second embodiment of the present invention.

FIG. 4 is a sectional view showing an explanation of the operation of the first embodiment of the present invention.

FIG. 5 is a sectional view showing an explanation of the operation of the second embodiment of the present invention.

FIG. 6 is a perspective view showing a conventional bridge wall.

[Explanation of symbols]

 1 Wall 2 Floor Slab 3 Lid 4 Opening 5 Rotating Spring 6 Movable Wall 8, 9 Wind 10 Main Girder

Front page continuation (72) Inventor Shigeto Hirai 5-717-1 Fukahori-cho, Nagasaki-shi Nagasaki Research Institute, Mitsubishi Heavy Industries, Ltd.

Claims (1)

[Claims] 1. In a wall structure erected at a side end portion on the deck of a bridge in the axial direction of the bridge, a ventilation opening in a part of the wall, the opening area of which can be changed according to the magnitude of cross wind. The wall structure of the bridge characterized by the provision of