Process for constructing prefabricated small box girder bridge by half-range construction firstly and then whole construction

Abstract

The invention provides a process for constructing a prefabricated small box girder bridge by half-range construction firstly and then whole construction. The process comprises the step of right half-range bridge construction including a pile foundation 1A, a pier 2A and a pier cover beam 3A; the pier 1A is located above the pile foundation 2A, a pier 1B is located above a pile foundation 2B, a pier cover beam 3B is located above the pile foundation 2B, and the pier cover beam 3B is located above the pile foundation 2B; and an upper main beam 4A is positioned above the pier cover beam 3A. The construction process method is reasonable, left and right half-range construction is conducted, then the left and right half-range construction is connected into a whole, the old bridge is used for keeping pass, a shortcut and a temporary bridge are prevented from being arranged in a riverway, economic investment is saved, and social influence is reduced, namely,without demolishing the old bridge, the old bridge plays the dual role of guaranteeing traffic and temporary access. After the old bridge is dismantled, a half-range bridge is constructed firstly to replace the old bridge to play a role of traffic keeping and a temporary access, the traffic keeping requirement is greatly met, the production and living requirements of residents on the two banks are met, the construction process is more reasonable, and therefore the problems and defects provided by the invention are effectively solved and overcome.

Description

technical field [0001] The invention relates to the technical field of bridge construction, and more specifically relates to a prefabricated small box girder bridge construction technology which is half first and then complete. Background technique [0002] During the construction of traditional bridges, temporary construction access roads (convenience bridges) or temporary access roads (convenience bridges) are usually erected, especially for bridge renovation projects on existing lines, and temporary access roads (convenience bridges) are built for the convenience of people traveling. For example, during the construction of a bridge across a river, for the construction site where the water depth is shallow, a drainage pipe is buried to build a construction access road; for a deep water depth, a steel trestle bridge is erected as a construction access bridge. [0003] The two ends of the existing cross-river bridge connect tourist attractions and the city center, and there ...

AI Technical Summary

Problems solved by technology

The river crossed by the existing bridge is a first-class tributary of the Yellow River. The bridge is located 15km upstream and 9.8km downstream. If the traffic is interrupted during construction, residents on both sides of the strait will have to detour for a long distance, which is very inconvenient and social. bad influence

At the same time, this bridge is a demolition and reconstruction bridge construction on the existing road. The inability to interrupt the traffic, the inability to set up sidewalks in the river and the inability to change the bridge position have become the three major problems to be solved in the construction of the bridge.

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