山岭隧道新奥法施工过程动态风险评估

将风险分析与施工量测体系相结合,对致险因子进行识别,确定风险评价指标体系;通过层次分析法(AHP)确定各个量测项目的权重,进而引入模糊数学理论,建立合理的隶属度函数,对具体的量测数据进行模糊综合评判;结合权重分析和赋分体系得到综合风险指数,从而建立山岭隧道新奥法NHTM施工过程动态风险评估模型.该模型可以将量测数据量化为单一的动态风险指数,并随着隧道开挖和量测的进行对施工风险进行动态评估.该动态风险评估体系在保阜高速隧道工程中得到了应用,应用结果表明该方法具有合理性和实用性.

Dynamic Risk Assessment of Mountain Tunnel during NATM Construction

In combination with the risk analysis and monitoring measurement system, risk the factors were identified and the risk evaluation index system was established, the amount of items in various weights was conformed by analytic hierarchy process, then, the measurement of specific data for fuzzy comprehensive evaluation was completed by creating reasonable membership function with an introduction of fuzzy theory, and the comprehensive risk index was obtained through the weights analysis and risk endowing system, thus, a dynamic risk assessment model was established for new Austrain tunnling method (NATM) construction in mountain tunnel. With the model, the measured data could be quantified as a single dynamic risk index, and the risk of construction could be dynamically. The dynamic risk assessment system was applied to Bao Fu highway tunnel, which could reflect the risk of tunnel construction process visually and timely. Analytical results show that the method is feasible and prospective.