隧道施工地层危险性评估模型研究

随着交通基础设施建设的大规模展开,对隧道工程需求量越来越大,隧道施工中的安全和风险控制问题变得更加突出。不利地层条件一直是影响隧道施工安全和风险的关键因素。利用相互作用矩阵确定各个主要地层参数的相对权重,采用概率方法和Monte Carlo模拟技术处理地层参数取值的不确定性,提出地层危险性指数计算公式和地层危险性等级划分方法,建立隧道施工地层危险性评估模型,并对不同地层危险性等级隧道施工风险管理的原则性对策提出建议。

Assessment Model for Geotechnical Hazards in Tunnel Construction

With the large-scale development of the traffic infrastructure,the tunnel construction is getting more and more important,and its safety and risk problems become more and more prominent.The adverse geotechnical conditions are considered as key factors affecting tunnel construction safety and risks.In this paper,the interaction matrix is used to determine the weights of the geotechnical parameters,the probabilistic method and Monte Carlo simulation technique are used to deal with the uncertainty of the geotechnical parameter values,and the calculation formulas of geotechnical hazard index and the classification method of the tunnel geotechnical hazards are proposed.The principal measures for construction risk management for tunnels with different class geotechnical hazards are also suggested.