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由于西南地区典型的高山峡谷地形地貌特征和区域强烈的“高地应力”的构造动力条件影响,水电站超大型地下洞室群面临的工程复杂性和难度超出现行经验认知。随着超大型地下厂房洞室群安全监测工程规模的不断扩大,利用现场实测的大量监测数据,借助现代化的监测软件系统,构建西南地区超大型地下厂房洞室群施工快速监测分析评价体系,并利用该体系对洞室围岩稳定进行分析评价,以实现地下厂房洞室群的施工过程动态设计,保证地下厂房洞室群的围岩稳定和运行安全。在分析评价体系的研究中,通过大量监测数据的统计分析,对围岩稳定的评价指标进行研究,拟定5个位移评价指标和5个支护荷载评价指标,并将评价指标的分级与围岩稳定分级相关联,实现地下厂房洞室群围岩稳定的快速评价;通过建立的评价体系流程应用于后续在建工程中,取得了不错的效果,可进行推广应用。
Due to the topography and topography of typical alpine canyons in Southwest China and the strong tectonic dynamic conditions in the region, the project complexity and difficulty of the super large underground caverns in hydropower stations are beyond the current experience. With the continuous expansion of the large-scale safety monitoring project of caverns in large underground powerhouse, the rapid monitoring and evaluation system for the construction of large-scale underground powerhouse caverns in Southwest China is established by using a large amount of monitoring data measured in the field and with the help of modern monitoring software system. The system is used to analyze and evaluate the stability of the surrounding rock in the tunnel so as to realize the dynamic design of the underground cavern group construction process and ensure the stability and operation safety of the surrounding rock of the underground cavern group. In the research of analysis and evaluation system, through the statistical analysis of a large number of monitoring data, the evaluation index of the stability of the surrounding rock is studied, and five displacement evaluation indexes and five support load evaluation indexes are drawn up. The grading of the evaluation indexes and the surrounding rock Stable grading associated with the rapid assessment of the stability of surrounding rock mass underground caverns; through the establishment of the evaluation system processes applied to follow-up projects under construction, and achieved good results, can be promoted.