A Simplified Design and Construction Method of Integral Abutment Bridge

Abstract

The invention discloses a simplified design and construction method of an integrated abutment bridge. A three-dimensional frame simplified calculation model of the integrated abutment bridge at a use stage, a two-dimensional spring frame calculation model for calculating the earth pressure behind the abutment of the integrated abutment bridge and a two-dimensional spring frame calculation model for calculating the equivalent pile length of the pile foundation of the integrated abutment bridge are provided, the resultant force and the acting position of the earth pressure behind the abutment are calculated, and the equivalent pile length under a given load working condition is calculated; next, the calculation results are applied to the three-dimensional frame simplified calculation model and bridge design software is adopted to perform design calculation on the integrated abutment bridge with the pile foundation for the abutment; construction, orderly comprising pile foundation construction and abutment construction, is carried out according to the design calculation results; a temporary support is arranged at the top of the abutment, a main beam is erected on the temporary support, joint concrete is poured so that the main beam and the abutment can be poured integrally, and therefore, the integrated abutment bridge is formed.

Description

technical field [0001] The invention relates to the field of bridge engineering, in particular to a simplified design and construction method for an integral abutment bridge using pile foundations. Background technique [0002] The expansion joints of the bridge are the gaps set in the upper structure to meet the needs of bridge expansion and deformation. The bridge expansion device is to make the vehicle pass the bridge smoothly and meet the needs of the deformation of the bridge upper structure. The expansion joints are made of rubber or steel The general term for various devices composed of such as. For the traffic management department, the existence of the bridge expansion device will bring many maintenance problems. In recent years, with the rapid development of my country's economic construction, the destruction of bridge expansion joints has become increasingly serious. For the problems of expansion joints, one solution is to cancel them. The concept of bridges wi...

AI Technical Summary

Problems solved by technology

The superstructure and substructure of the integral abutment bridge are poured as a whole, which makes any slight expansion and contraction deformation of the main girder will affect the stress of the abutment, flexible pile foundation under the abutment, backfill and pile side soil and deformation, and the substructure and foundation soil will also limit the expansion and deformation of the beam body, which makes the force analysis of integral abutment bridges have many uncertainties and complexities, which brings great challenges to its popularization and application. The difficulties are basically relying on experience and incomplete technical literature, and have not fundamentally solved the design theory calculation analysis and construction methods

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