基于模糊数学理论的下穿既有线路基施工风险评价研究

为降低下穿既有铁路路基施工风险发生的概率,以沪通铁路下穿既有铁路路基施工为研究对象,采用主观评价与客观计算相结合的方法对其进行风险评价,使施工阶段的风险得到有效的控制。对影响路基施工阶段及既有线安全运营的风险源进行分析归类,建立风险评价体系,并通过指数标度法下的AHP给定指标权重,制定相应的评判标准评价风险等级,最终利用模糊数学理论确定其综合风险等级。

Study on the Risk Evaluation of the Construction of Underneath Passing Existing Line Subgrade Based on Fuzzy Mathematic Theory

In order to reduce the construction risks of underneath passing existing railway subgrade, the risk evaluation is carried out by using the method combining subjective evaluation with objective calculation taken the construction of underneath passing existing railway subgrade of Shanghai-Nantong railway as the research object, effectively controlling the risks during construction period. Analyze and sort the risk sources affecting the safe operation of subgrade construction and existing line, establish risk evaluation system, give index weight through AHP under index scale method and formulate corresponding evaluation criteria to evaluate the risk levels so as to finally determine its comprehensive risk level using fuzzy mathematic theory.