Tensile device for side piers and auxiliary piers of large-span bridge

Abstract

The utility model discloses a tensile device for side piers and auxiliary piers of a large-span bridge. The tensile device comprises a main beam, piers, a bearing platform, a support, a balance inhaulcable device and a prestressed steel beam device, a one-way pressed support is arranged between the main beam and the tops of the bridge piers, and the main beam and the bridge piers are connected through a vertically-arranged balance inhaul cable device to balance the uplift force of the main beam at the bridge piers; the bridge piers are of concrete structures, and the bridge piers and the bearing platform are connected through a vertically-arranged prestress steel beam device, so that concrete on the bridge piers is in a pressed state. It is guaranteed that the side piers and the auxiliarypiers of the large-span bridge do not generate negative reaction force, support disengaging is avoided, and safe operation of a large-span bridge structure is guaranteed; the structure is simple, thebalance weight of the main beam at the pier is effectively reduced or the balance weight of the main beam is canceled, and good economic performance and popularization value are achieved.

Description

technical field [0001] The invention belongs to the technical field of bridges, in particular to a tensile device for side piers and auxiliary piers of long-span bridges. Background technique [0002] Bridge bearings are generally unidirectional in compression. In some cases, when the upward vertical force on the main girder at the pier exceeds the downward vertical force, a "negative reaction force", or "uplift force" occurs. If reasonable measures are not taken, the support at this place will appear empty, which may affect the safety of the entire structural system. This phenomenon is more likely to occur at side piers and auxiliary piers of long-span bridges such as cable-stayed bridges, self-anchored suspension bridges, and arch bridges. [0003] In order to prevent the support from falling out, measures such as setting a counterweight in the main girder and setting the end support of the adjacent span approach bridge on the main girder structure as a counterweight can...

AI Technical Summary

Problems solved by technology

But sometimes, the counterweight alone cannot balance all the negative reaction forces, or too much counterweight will cause other structural problems. At this time, other economical and reasonable measures are needed to eliminate the negative reaction forces.

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