External Prestressing In The Application Of Old Bridge Reinforcement

Modern prestressed technology promoted the rapid development of civil industry, at the same time also for the bridge reinforcement industry provides an active and effective reinforcement method. With the development of the prestressed technology, new material and intelligent prestressed tension control system, the emergence of prestressed technology in the field of bridge reinforcement application will be more widely.This article mainly introduces the XuPing henan province south highway interchange XiangCheng HuTongShi ramp Bridges of bridge reinforcement engineering application of prestressed reinforcement technology implementation example of maintenance, in order to bridge reinforcement prestressed technique in the research on the application of have a promotion and reference function。This article through the practice of henan province highway research XuPing nan XiangCheng HuTongShi overpass ramp Bridges of bridge reinforcement engineering, XiangCheng HuTongShi overpass ramp Bridges by in vitro prestressed reinforcement method after a first into a law, in the construction process of practical engineering draws some guidance conclusion. This paper mainly introduces the redesign of continuous box in vitro prestressed strengthening technology, the research result of the thesis mainly summarized in the following aspects:(1) Web add C50self-compacting concrete pouring method.(2) the pretensioning method into the post tensioning construction process needs attention.(3) tensioning process should be paid particular attention to the issues and improve the tensile safety factor method.(4) prestressed tension used in the monitoring and checking method.