流场作用下大型地下厂房围岩稳定性分析  

Surrounding Rock Stability Analysis of Large Underground Plant under Seepage Condition

作　　者：苏国韶[1] 符兴义[1] 燕柳斌[1] 

机构地区：[1]广西大学土木建筑工程学院,南宁530004

出　　处：《地下空间与工程学报》2010年第4期717-723,共7页Chinese Journal of Underground Space and Engineering

基　　金：国家自然科学基金资助项目(50809017);中国博士后科学基金及特别资助项目(20080440812;200902354)

摘　　要：为分析水库蓄水后地下水渗流场对某水电站大型地下厂房洞室群围岩稳定的影响,根据流固耦合理论,采用三维快速拉格朗日法进行数值分析。在地下厂房施工期开挖支护全过程三维数值仿真的基础上,通过有无渗流场的影响、有无设置防渗与排水设施等不同工况进行对比计算分析,根据相应的岩体三维渗流场、塑性破坏区、位移场和应力场等计算结果,对电站运行期渗流场作用下地下厂房洞室群围岩与支护结构的稳定性进行分析与评价,论证了地下厂房防渗及排水设施设置的必要性和合理性,为大型地下厂房的合理设计与安全运行提供了科学依据。Fast Lagrangian analysis of continua in 3 dimensions（FLAD3D） numerical method is applied to analyze the seepage field impact on surrounding rock stability of the large underground power house after the impoundment of the reservoir according to coupled fluid-mechanical theorem.Based on numerical simulation of full process of caving and supporting of underground plant during construction period,the calculated results in different working conditions are compared.Through analysis of the numerical results of seepage field,plastic zones,displacements,stress field,surrounding rock stability and its supports stability of the large underground plant are evaluated.Furthermore,the layout of grout curtain and drainage structures is proved to be necessary and reasonable.Some conclusions are obtained which are useful for reasonable design and safe construction of the large underground plant.

关 键 词：地下厂房 渗流 围岩 三维快速拉格朗日法 

分 类 号：TV745[水利工程—水利水电工程]