Ground anchor type suspension bridge with rotary anchoring main cable and construction method

Abstract

The invention relates to a rotary anchoring main cable ground anchor type suspension bridge and a construction method.The rotary anchoring main cable ground anchor type suspension bridge comprises a suspension bridge body, a main cable steering device and an anchorage anchoring structure, and the main cable steering device and the anchorage anchoring structure are arranged on an anchorage of the suspension bridge body; the main cables on the two sides of the suspension bridge body are steered by the main cable steering devices and connected with the anchorage anchoring structures respectively. Due to the fact that the main cable of the suspension bridge body steers through the main cable steering device and is connected with the anchorage anchoring structure, rotation anchoring of the main cable is formed, dead load pulling force of the main cables on the two sides is balanced, only a small amount of main cable variable load pulling force generated by unbalance loading such as vehicle loads is borne by the anchorage anchoring structure, stress of the anchorage anchoring structure can be greatly reduced, and the service life of the suspension bridge is prolonged. And the using amount of anchorage anchoring structures and anchorage materials is obviously reduced, and therefore the structural safety and economical efficiency are improved. Meanwhile, the anchorage anchoring structure is located on the surface of the anchorage, and inspection and maintenance are convenient.

Description

technical field [0001] The invention relates to the technical field of bridge engineering, in particular to a ground-anchored suspension bridge with a slew-anchored main cable and a construction method. Background technique [0002] At present, the anchorage of the ground-anchored suspension bridge is separated from the stiffening beam, and the tension of the main cable is transmitted to the ground through the anchorage, while the stiffening beam does not bear the tension of the main cable. The main cable is the main load-bearing component of the ground-anchored suspension bridge. Usually, there is a main cable on each side of the bridge, which is respectively anchored on the anchorage anchorage structure on the left and right sides and the anchorage structure on the top of the tower, and is connected with the anchorage anchorage and the bridge tower as a whole. It is used to bear all the loads of stiffened beams and passing vehicles. Because the tension of the main cable i...

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