Self-anchorage type suspension bridge design and construction method adopting first cable later beam dynasty

Abstract

The invention discloses a self-anchorage type suspension bridge design and construction method adopting a first cable later beam dynasty. The method includes the steps that (1), bridge towers and piers are constructed, and main beam anchoring sections are constructed; (2), temporary anchors are constructed, and temporary pintle cables are mounted; (3), main cables are erected, and the temporary pintle cables are tensioned synchronously; (4), main beam sections are hoisted, main cable saddles on the tops of the bridge towers are pushed, and the temporary pintle cables are tensioned; and (5), the main beams are formed into a whole, the temporary pintle cables are detached, and system conversion is completed. The method has the beneficial effects that force bearing is clear, monitoring is facilitated, and navigation below a bridge is not interrupted, the construction method is simple and convenient, and design and monitoring are facilitated. Compared with a construction method adopting afirst beam later cable construction method, the requirements of navigation below the bridge can be guaranteed, the temporary measures that full framing and temporary piers are erected in a riverway with a deep riverbed are avoided, the construction problems of a self-anchorage type suspension bridge which has high requirements on navigation below the bridge and is located at the deep position of the riverbed can be solved, and the competitiveness of the large-span self-anchorage type suspension bridge is further improved.

Description

technical field [0001] The invention belongs to the technical field of bridge design and construction, and in particular relates to a design and construction method of a self-anchored suspension bridge with cables first and beams second. Background technique [0002] The biggest difference between the self-anchored suspension bridge and the traditional ground-anchored suspension bridge is that the main cable of the former is anchored on the main girder, while the main cable of the latter is anchored on the ground. Since the main cable of the self-anchored suspension bridge is anchored on the main girder, the main girder is subject to a huge horizontal component force after the bridge is completed; the main girder is gradually assembled into a whole during the construction process, and only when the main girder is integrated can it bear large Therefore, how to transfer the horizontal force of the main cable to the main girder has become one of the key technologies in the desi...

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Problems solved by technology

[0007] The Chinese patents whose publication numbers are CN106149569A, CN204418031U and CN104652285A propose to adopt a tower-beam temporary anchorage device, and the temporary anchorage device is used to bear the horizontal force component of the main cable in the construction process; but as the span of the self-anchored suspension bridge continues to increase, The horizontal component force of the main cable is also continuously increasing, the temporary consolidation between the main girder and the pier tower and the thrust stiffness of the pier tower itself limit the further increase of the span of the self-anchored suspension bridge

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