Cable-stayed anchorage system of cable-stayed fabricated highway steel bridge

Abstract

The invention relates to a stay cable anchor system of a cable-stayed assembly type road steel bridge. A two-span self-balancing single-cable-bent-tower double cable plane structure is adopted for the steel bridge, and a main beam is provided with a river suspension span and a land span, on-tower anchor components are arranged on a cable tower, and a one-division-several stay cable system is connected between the cable tower and the main beam. Stay cables on the two sides of the cable tower are symmetrically arranged, and single-lug-type anchorage devices are adopted for the anchorage ends on the stay cable tower and directly anchored on webs of the anchor components on the tower in a pin joint mode. On-beam detachable anchor components are adopted for stay cables and located at the intersecting positions between truss vertical web members and upper chords, and the on-beam anchor components are of a rotatable structure. The single-lug-type anchorage devices are adopted for the anchorage ends on the stay cable tower and can be directly anchored on the webs in the pin joint mode. The stay cable anchor system is simple in structure and easy and convenient to splice and construct; the one-division-several stay cable system disperses anchorage points on the main beam, anchorage force on the main beam of the stay cables is effectively reduced, meanwhile, elastic supporting points of the main beam are densified, the practical span of the main beam is shortened, and the stress state of truss pieces is improved.

Description

technical field [0001] The invention relates to an anchoring system of a cable-stayed bridge, in particular to a cable-stayed assembly type cable-stayed cable anchoring system of a highway steel bridge capable of rapid installation and tensioning. Background technique [0002] The prefabricated highway steel bridge is a standard bridge that can be disassembled and can be erected quickly. be widely used. Especially at the critical juncture of emergency rescue and when time becomes the key factor, the prefabricated highway steel bridge plays a very important role. [0003] With the rapid development of my country's highway construction, especially the comprehensive construction of national expressways, long-span (single-span ≥ 70m) highway bridges are becoming more and more popular. These bridges will be damaged due to natural disasters such as earthquakes, flash floods, mudslides, or people's daily traffic activities, resulting in traffic interruption. In order to ensure t...

AI Technical Summary

Problems solved by technology

The feature is that the span of the bridge is increased through the cable system. The cable tower of the conventional cable-stayed bridge needs to be connected with the foundation with a permanent concrete deep foundation. The beam is anchored on the base, so the erection time is quite long, and the cable adjustment is very troublesome, which cannot meet the rapid erection requirements of emergency rescue

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