Viaduct cross-ground parallel bridge buttress full framing combined support and construction method thereof

Abstract

The invention provides a construction method of a viaduct cross-ground parallel bridge buttress full framing combined support. The method comprises the steps of 1 conducting construction preparation;2 driving center parting strip steel pipe piles; 3casting bridge deck temporary buttresses in place; 4 erecting pier top longitudinal bailey beams and distributive girders; 5 erecting a full framing;6 pre-pressing the support; 7 conducting upper-layer box girder formwork erecting and pouring; and 8 dismounting a template and the support, namely erecting temporary supporting points on bridge decksright above bridge decks (buttresses) at the two ends of a ground bridge which is implemented in advance, erecting steel pipe pile foundation buttresses in the framing middle of the ground bridge, and erecting longitudinal Bailey longitudinal beams and profile steel distribution beams to form a combined support system for erecting the full framing. The problem of erecting of the cast-in-place boxgirder support of an overpass bridge is solved.

Description

technical field [0001] The invention relates to the field of construction of upper-span cast-in-place box girder bridges, and in particular to a combination support for viaducts spanning ground-parallel bridges with piers full of halls and a construction method thereof. Background technique [0002] With the increase of urban traffic flow, urban traffic is becoming more and more complex, and the traffic network has problems such as road congestion and service level decline, which has become a bottleneck affecting the smoothness of urban roads. Therefore, the viaduct lifting project has become an effective measure to solve the problem of existing road congestion. In general viaduct lifting projects, it is necessary to design bridges on the ground to cross each other in vertical space, resulting in mutual influence of construction. The lifting of viaducts generally follows the construction sequence of first high and then low. However, in the practice of the project, the urban...

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Problems solved by technology

However, in project practice, the urban main roads or expressways that cross each other, due to policy treatment and other reasons, often cause the ground bridge to be constructed first, which makes it difficult for the construction of the upper-span cast-in-place box girder bridge

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