基于TBA法的地下厂房围岩力学参数位移反分析  

Displacement Back-analysis of Surrounding Rocks for Mechanical Parameter-field of Underground Powerhouse Based on TBA Method

作　　者：魏云杰[1] 陶连金[1] 许模[2] 

机构地区：[1]北京工业大学城市与工程安全减灾省部共建教育部重点实验室,北京100022 [2]成都理工大学地质灾害与地质环境保护国家重点实验室,成都610059

出　　处：《北京工业大学学报》2008年第10期1072-1076,共5页Journal of Beijing University of Technology

基　　金：“十一五”国家科技支撑计划项目资助(2006BAJ05A02、2006BAJ27B05);北京市自然科学基金资助项目资助(8062007)．

摘　　要：讨论了TBA反分析法的原理,结合某水电站地下洞室工程中地下厂房的开挖过程,建立了模拟动态施工的有限元模型,运用TBA法对地下厂房的围岩力学参数进行了反演计算,运用遗传算法进行了数值验证,有效地确定了岩体的弹性模量.结果表明,增量位移与实测值吻合较好.The principles and procedures of TBA method are described in detail. A dynamic muti-step finite element model is established to simulate excavation process of caverns in a hydropower station, and a calculation of getting mechanical parameter-field of surrounding rock has been done with the TBA method. The result is presented with numerical validation with GA. The elastic ratio rock is fixed effectively. The results show that the incremental displacements are consistent well with those measured ones. The distribution of parameters of rock mechanics is consistent with the real one.

关 键 词：TBA法 位移反分析 地下厂房 岩体力学参数 

分 类 号：TU452[建筑科学—岩土工程]