上跨既有高速铁路顶推施工风险评估体系研究

Research on Risk Assessment System of Top and Span High Speed Railway Jacking Construction

依托预应力混凝土连续梁跨越汉宜高速铁路具体工程案例,通过理论研究及运用层次分析法,对上跨既有高速铁路顶推施工风险评估体系展开了研究。研究了桥梁顶推施工风险评估内容,明确风险评估流程,针对顶推施工风险问题,进行了系统全面的顶推施工危险因素分析。采用层次分析法进行危险因素重要性分析,计算出各危险因素对施工风险重要性权重,确定重要危险因素评价单元,进而制订合理风险控制措施。

Relying on the concrete project case of the prestressed concrete continuous beam crossing the Han Yi high speed railway, through the theoretical research and the application of the analytic hierarchy process, this paper studies the risk assessment system of the top and span existing high-speed railway jacking construction. The risk assessment content of the bridge jacking construction is studied and the risk is clearly defined. The evaluation process is carried out, aiming at the risk problem of incremental launching,a systematic and comprehensive risk analysis is carried out. To analyze the importance of risk factors by analytic hierarchy process, calculate the weight of risk factors to the importance of construction risk, determine the important risk factor evaluation unit,and then formulate reasonable risk control measures.