JPH02217504A - Cable supporting aqueduct - Google Patents

Abstract

PURPOSE:To lighten the weight of a bridge by suspending bearing members which get lower on the levels in order toward both the ends from the central section of a bridge main-body, to support the lower ends of the bearing members with a cable, and by fixing both the ends of the cable on bridge bases after the tensile force of the cable is regulated. CONSTITUTION:Bearing members 11 provided with cable supporting sections 13 at the tips, which get lower on the levels in order toward both ends from the central section of a bridge main-body 10, are suspended. After that, the lower ends of the bearing members 11 are connected to each other to be supported with a cable 16, and a tensile force is applied to the cable 16, and after the tensile force is regulated, both ends of the cable are fixed on bridge bases 2. As a result, a wind load can be reduced, and a lightweight aqueduct for facilitating the execution of work can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a cable-supported aqueduct bridge in which the load of the bridge body is supported by cables via supporting members suspended from the bridge body.

[Prior Art] In the case of an aqueduct bridge with a long span, a truss-stiffened type, Langer-stiffened type, or cable-stayed type aqueduct bridge is used to compensate for the rigidity of the bridge body.

[Problems to be solved] However, in the case of the truss stiffening type, a large amount of high-strength members are required to construct the truss, and in the case of the Langer stiffening type, it is necessary to construct the arch part. There are problems such as the need for a large amount of high-strength members. Also,
In the case of the cable-stayed type, there are problems such as the need to erect a long tower.

An object of the present invention is to provide a cable-supported aqueduct bridge that can solve the above-mentioned problems.

[Means for Solving the Problems] The cable-supported aqueduct bridge of the present invention supports both ends of the aqueduct bridge body with abutments, and the bridge body is provided with height-enhancing structures that gradually increase in height from the center of the bridge body toward both ends. A plurality of lower supporting members are installed vertically, cable supporting parts are provided at the lower ends of these supporting members, and cables are stretched over these cable supporting parts and both ends of the cables are fixed to the abutment.

[Action] The bridge body load is supported by cables via support members installed vertically on the bridge body, which significantly reduces the amount of material used compared to the case of supporting with conventional trusses and rigid arches, making it lighter. It is possible to aim for In addition, compared to trusses and rigid arches, the pressure-receiving area on the sides is smaller, so wind loads can be reduced.
From this aspect as well, weight reduction can be achieved. In addition, there is no need to erect a long tower unlike in the case of a cable-stayed type, making construction easier.

[Example] Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

One end of the bridge body 10 is supported by the bridge abutment 2 via a support 3 and the other end via a roller 4.

A plurality of supporting members 11 are vertically provided on the bridge body 10. These supporting members 11 are highest at the center of the bridge body 10 and gradually become lower toward both ends. These supporting members 11 are reinforced by places 12. A cable support portion 13 in which a groove for receiving the cable 16 is formed is provided at the lower end of each support member 11 . Further, a shaft 14 around which a cable 16 is wound is provided at both ends of the bridge body 10.

Then, the cable 16 is hung around the support part 13 of each support member 11 and wound around the shaft 14 at both ends of the bridge body 10, and after adjusting the tension tA,
Both ends of the cable 16 are fixed to the abutment 2.

[Effect of the invention] The cable supported aqueduct bridge of this invention is as described above,
Since the bridge body load is supported by cables via supporting members installed vertically on the bridge body, the material used is significantly reduced compared to the conventional case where support is supported by trusses and rigid arches, resulting in weight reduction. can be achieved. In addition, since the pressure-receiving area of the side surface is smaller than that of a truss or a rigid arch, the wind load can be reduced, and weight reduction can also be achieved from this point of view. In addition, there is no need to erect a long tower unlike in the case of a cable-stayed type, making construction easier.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing one embodiment of the present invention. 2... Bridge abutment 10... Bridge body 11... Support material 1
3... Cable support part 16... Cable 1lF1
figure

Claims (1)

[Claims] Both ends of the main body of the aqueduct bridge are supported by abutments, and a plurality of supporting members whose height decreases sequentially from the center of the bridge main body toward both ends are hung from the bridge main body, and the lower ends of these supporting members are A cable-supported aqueduct bridge in which cable support sections are provided respectively, cables are stretched across these cable support sections, and both ends of the cables are fixed to the abutments.