大型地下洞室群地震防灾减灾对策研究

Studies on the Seismic Countermeasures for Disaster Prevention and Mitigation of Underground Cavern

开展地下洞室群地震防灾减灾对策研究在实际的工程应用中具有非常重要的意义。然而针对目前地下洞室群地震防灾减灾对策研究十分匮乏的情况。文章基于地震灾害风险并结合地下洞室群空间分布特征及行业特点,分析了衬砌支护措施对于地下洞室群结构的抗震效果影响,阐述了不同衬砌厚度条件下的洞室结构动态响应变化规律;采用Dijkstra法、最短路径法及疏散路径当量长度法,提出了地下洞室检修人员处于最不利位置时的应急疏散路径;针对非贯穿性裂缝、贯穿性裂缝、破碎岩体脱落及洞室坍塌性破坏等不同性质的震损结构与破坏程度,深入研究了不同的修复措施与方案。

It is very important to carry out the analysis and research on the countermeasures of seismic disaster prevention and reduction in underground cavern group. However, the research on the countermeasures of seismic disaster prevention and reductfon for underground cavern group is very scarce. Based on the risk of the seismic disaster, the spatial distribution and the industry characteristics of underground cavern group, the influence of lining support measures on the seismic effect of underground cavern group structure was analyzed, and the dynamic response of the structure under different lining thick-ness was described. This paper proposes emergency evacuation path for the maintenance personnel in the most unfavorable place by Dijkstra method, the shortest path method and evacuation path equivalent length method. According to the differ-ent seismic damage structure and damage degree of the non-penetrating crack, the penetrating crack, the broken rock mass and the collapse of the cavern, different restoration measures and schemes were studied in depth.