复线桥施工对既有桥梁的安全控制分析

在既有桥梁下新建复线桥时,新建桥梁施工过程必然对既有桥梁产生影响。文章以重庆高家花园复线桥主桥为研究对象,分析复线桥主桥基础施工、桥墩施工和主梁施工各个阶段的风险源,并采用风险矩阵分析,合理评估每一风险事态对既有桥梁造成的风险等级,提出风险应对措施,以减少总体风险损失。通过风险评估,可为复线桥施工提供科学依据,杜绝安全隐患与风险,加快施工进度。

Safety Control Analysis on the Existing Bridges during Double-track Bridge Construction

During the construction of new double-track bridge under existing bridges, the new bridge construction process will inevitably have an impact on the existing bridge.With the main bridge of Chongqing Gaojia Garden Double-track Bridge as study object, this article analy-zad the risk sources during various stages of double-track bridge, such as main bddge construction, pier construction and main beam construction, and by using the risk matrix analysis, it reasonably assessed the risk level caused by each dsk situation on the existing bddge, and proposed the dsk response measures, so as to reduce the overall dsk loss.Through risk assessment, it can provide the scientific basis for doubletrack bridge construction,so as to eliminate the safety hazards and dsks, and to accelerate the construction progress.