随机块体对泰山抽水蓄能电站地下厂房稳定性的影响分析  

Influence of a Random Block on the Stability of the Underground Power House of the Taishan Pumped Storage Power Plant

作　　者：张立[1] 陈小宾[1] 廉明远 贾超[2] 张国荣[2] 

机构地区：[1]山东泰山抽水蓄能电站有限责任公司,泰安271000 [2]山东大学土建与水利学院,济南250061

出　　处：《现代隧道技术》2017年第3期97-104,共8页Modern Tunnelling Technology

基　　金：国家自然科学基金项目(41272325);国家电网新源公司项目(SGXY-2014FJ04-73;GXY-2014FJ04-74);国家留学基金项目(201306225024)

摘　　要：关键块体的稳定性决定着岩体地下洞室的整体稳定性,因此确定洞室围岩关键块体的位置、大小以及关键块体失稳模式对控制及预测洞室的安全性至关重要。泰山抽水蓄能电站地下厂房围岩受到不连续面切割,存在稳定性问题,故对其长期稳定性进行了深入研究。在获得研究区节理裂隙产状概率特征的基础上,采用赤平极射投影法确定该区地下厂房概率最大失效模式,搜索厂房区关键块体的位置,并对其长期稳定性进行分析预测,给出关键块体安全性的定量指标。同时将强度折减法与关键块体理论相结合,对地下厂房长期稳定性及风险进行了有效预测,研究成果可为泰山抽水蓄能电站后续加固方案的制定提供借鉴与依据。The overall stability of an underground cavern is determined by the stability of a key block of rock mass, and it is critical to determine the location, size and instability mode of the key block in order to control and predict tunnel safety. The surrounding rock of the Taishan pumped storage power station underground workshop is cut by a discontinuous plane and has problems related to stability. Based on the probability characteristics of the joint crack orientation, the maximum failure mode was determined using stereographic projection; the key block positions of the workshop were determined, the long-term stability was forecasted and the quantitative index for the key block safety was given. Combining the strength reduction method with key block theory, the long-term stability and risks of the underground plant were effectively forecasted.

关 键 词：抽水蓄能电站 关键块体理论 节理裂隙岩体 稳定性 概率 

分 类 号：U453.2[建筑科学—桥梁与隧道工程]