Construction Technique Of Long Span Continuous Beam Bridge Pouring By MSS

At present, the domestic and foreign move scaffolding system construction still used the conventional routes, causes the move scaffolding system, in the situation of bridge span increases, steel quantity grow sharply. This has restricted move scaffolding system construction span enlargement. With the rapid development of Chinaese national economy, bridge construction technology develop with each passing day, Dingtui and Xuanpin construction span arrange rised to 64m. but MSS economic span still under 50m. so innovative design is needed. This article proposed partition pouring method called CMSSP labor law, can reduce MSS construction moment, and steel usage, then use MSS pour 70m span bridge. so study of CMSSP is needed.This article start from the analysis of CMSSP craft use in the Ganjiang bridge of 40m+4×70m+40m, carry on the section and the pre-stressed design to the Ganjiang bridge of 40m+4×70m+40m, and structure stress and distortion computation., and proposed the new technology of piecemeal construct, with constructs the 70m greatly span bridge, and made the brief introduction to this plan use's liusi truss. And make the economical technical analysis of the move scaffolding system labor law.Firstly, Summarizes domestic and foreign move scaffolding system construction technique, and Huangpu bridge MSS62.5 construction. Pointed out the question that the present MSS labor law exist, and the research content of this article.Secondly, Summarizes contour beam bridge, and move scaffolding system piecemeal construction's development, proposed that great span contour beam bridge construction technology of CMSSP craft, and proposes the pre-stressed design principle.Thirdly, study the Ganjiang River bridge to change move scaffolding system construction plan, discuss piecemeal construction length choice, carry on concrete box beam section and pre-stressed design, and technonlogy economy analysis, and carry on the construction stage and builded bridge checking calculation.Fuorthly, discuss the assembly type steel beam choice of piecemeal move scaffolding system construction plan, and jiujiang river second bridge change move scaffolding system construction plan, and CMSSP70 plan technology economy analysis.Finally, draws the research conclusion and forecast.