缓倾岩层隧道施工风险评估研究

基于熵法、模糊综合评价法,并结合离散元数值模拟方法,对缓倾岩层隧道的施工风险评价与对策进行研究。通过回顾相关文献,建立针对缓倾岩层隧道的施工风险评价指标体系,将熵法和模糊综合评价法运用到风险评价中,结合离散元数值模拟软件3DEC判断围岩及支护系统的稳定性,为风险评估提供依据。根据风险评估结果提出相应的风险规避对策。实践表明,针对缓倾岩层隧道建立的指标体系和评估方法,结合定量数值模型分析,有效提高评估施工风险的可靠程度与支护设计的针对性及有效性,以期减少安全事故。

Study on Risk Analysis of Tunneling in Slight Inclined Stratum Rock

Based on entropy weight method and comprehensive evaluation method and in combination with discrete element method,this paper conducts the study on risk analysis and strategy-making for tunnels in slight inclined stratum. According to literature review,a risk evaluation index system for tunnels in slight inclined stratum is developed. In the analysis,entropy weight method and comprehensive evaluation method are used together. Based on the results,discrete element numerical simulation software3 DEC is employed to study the stability of rock mass and support system. According to risk evaluation results,corresponding risk prevention measures are proposed. The practices show that the newly established index system and the evaluation method together with the numerical simulation analysis could efficiently assess the risk of construction and the pertinence and effectiveness of the support system,thus to reduce safety accidents.