隐伏溶洞对隧道施工安全影响的风险评估体系

发布时间：2018-06-02 13:51

本文选题：岩溶隧道 + 隐伏溶洞　；参考：《现代隧道技术》2017年04期

【摘要】：作为岩溶地区隧道建设重大安全隐患的隐伏溶洞,易造成突水涌泥、坍塌和沉陷等严重事故,但对相关的风险辨识预警理论尚缺乏系统的研究。文章通过案例统计与理论分析,将隐伏溶洞致险因子划分为地质因素与施工因素两类,其中,地质因素包括:隐伏溶洞相对隧道所处方位、充填物类型与状况、溶洞与隧道间距、围岩等级和溶洞规模等五项;施工因素包括:超前地质预报和施工监测两项。基于致险因子与岩溶隧道施工事故的关系,采用层次分析法计算各致险因子的常权重值,并考虑到不同岩溶隧道的差异,在常权重基础上提出了变权重算法。针对岩溶隧道安全事故系统演化规律,确定致险因子评估取值范围,并给出了隐伏溶洞风险评估等级划分标准。最后结合工程实例,验证了文章所建风险评估体系的可行性和合理性。
[Abstract]:As a major safety hazard in tunnel construction in karst area, karst caverns are liable to cause serious accidents, such as water gushing, collapse and subsidence, etc. However, there is no systematic research on the related risk identification and early warning theory. Through case statistics and theoretical analysis, the paper divides the hidden cave risk factors into geological factors and construction factors, among which, the geological factors include: the location of the concealed karst cave relative to the tunnel, the type and status of the filling. The distance between karst cave and tunnel, the grade of surrounding rock and the scale of karst cave are five items, and the construction factors include two items: advanced geological forecast and construction monitoring. Based on the relationship between risk factors and construction accidents of karst tunnels, the constant weight of each risk factor is calculated by analytic hierarchy process (AHP), and considering the differences of different karst tunnels, a variable weight algorithm is proposed on the basis of constant weight. According to the evolution law of karst tunnel safety accident system, the range of risk factor evaluation is determined, and the classification standard of hidden karst tunnel risk assessment grade is given. Finally, the feasibility and rationality of the risk assessment system established in this paper are verified by an engineering example.
【作者单位】：同济大学岩土及地下工程教育部重点实验室;同济大学地下建筑与工程系;中交城市轨道交通设计研究院有限公司;安徽省综合交通研究院股份有限公司;
【基金】：贵州省交通厅科技项目(2010-122-010,013,016)
【分类号】：U452.11

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