某地下厂房施工过程中突发性破坏的分析及对策

某地下厂房施工过程中突发性破坏的分析及对策 English Version

摘要: 对某水电站地下厂房洞室群施工过程中的一次突发性塌方，作了简介和分析。采用节理裂隙岩体非线性有限元法对洞群施工过程进行了跟踪模拟仿真计算，并与现场监测资料对比进行反馈分析。同时对高地应力裂隙岩体中大型洞群各洞室间的相互关系、变形规律、破坏特征及原因，以及相应工程对策提出了新的见解和建议。
- 地下厂房 /
- 节理岩体 /
- 高地应力 /
- 变形 /
- 破坏
Abstract: Ertan Hydropower Project is located on Yalong River in Southwest China, Sichuan Province. It is the largest under ground hydropower station in Asia. Six Francis units are installed in the powerhouse, which is located in the rock mass of the left side bank of the river. At the site of underground powerhouse intact syenite and basalts with mainly three sets of joints and very high initial stress are predominant. Reasons of triggering collapse in busbar galleries and tail pipes and large deformation in powerhouse happened last year are analysed by different means. Results are compared with the observation data obtained insitu. Some new opinions on the stability of the underground complex are presented.
- underground powerhouse /
- jointed rock mass /
- high initial stress /
- deformation /
- breakdown