Cross-over type bridge cast-in-place platform simulating identical load sectional pre-pressing construction method

Abstract

The invention discloses a cross-over type bridge cast-in-place platform simulating identical load sectional pre-pressing construction method, and belongs to the technical field of cast-in-place concrete bridge pre-pressing. The problems that a practical working condition cannot be simulated by span-by-span time-share pre-pressing while the cost is high by adopting whole bridge simultaneous pre-pressing when a bridge adopts a steel pipe pile and a Bailey beam to serve as a supporting system are solved. According to the construction method, Midas-civil is adopted to conduct modeling calculation,the deformation situation of a support can be analyzed in advance, when span-by-span pre-pressing loading is conducted, load arrangement is conducted pointedly so as to be equivalent to full span loading, and the purpose that span-by-span pre-pressing simulates full span pre-pressing is achieved. Because limited pre-pressing materials can be used repeatedly, one-time investment is greatly reducedaccordingly, the construction period is shortened, and the cost is saved.

Description

technical field [0001] The invention belongs to the technical field of preloading of cast-in-place concrete bridge supports, and specifically relates to a segmental preloading construction method for supports of cast-in-situ continuous beam bridges using steel pipe columns and Bailey beams as support systems. Background technique [0002] With the continuous and rapid advancement of my country's infrastructure construction, a large number of cast-in-place bridges need to be erected, and the preloading test is an important link to verify the safety of cast-in-place bridge supports and eliminate related inelastic deformation. In order to reduce the amount of supports erected, spanning supports formed by steel pipe columns and Bailey beams are usually used as the support system for bridge cast-in-place construction. [0003] For long-span continuous girder bridges, the preloading of supports can be divided into simultaneous preloading of the whole bridge and time-sharing preloa...

AI Technical Summary

Problems solved by technology

[0004] When a large number of bridges in the prior art use steel pipe piles + Bailey beams as the support system, the actual working conditions cannot be simulated by using time-sharing preloading span by span, and there is a problem of high cost whe

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