水布垭电站地下厂房软岩置换效果初步分析  

Analysis on effect replacement of softrock of Shuibuya underground powerhouse

作　　者：罗先启[1] 葛修润[2] 郑宏[2] 

机构地区：[1]三峡大学土木学院,湖北宜昌443002 [2]中国科学院武汉岩土力学研究所,湖北武汉430071

出　　处：《岩土工程学报》2003年第4期463-467,共5页Chinese Journal of Geotechnical Engineering

摘　　要：为考虑地形地貌以及节理、断层等岩体构造对原始地应力场的影响,首先选用较大计算范围以模拟水布垭地下厂房地应力场。然后取较小计算范围进行二次细分网格,以便较准确地模拟地下厂房分步开挖的动态过程。二次细分网格位移边界值采用等参逆变换法由一次网格的计算结果插值得到。软硬相间岩层中地下厂房稳定性分析采用弹塑脆性理论。重点对地下厂房中P31q软岩及黄龙剪切带置换效果进行了分析,并对地下厂房的布置及软岩置换提出了建议。A large model was used to simulate the effects of terrain, physiognomy etc. to original ground stress.A small model,in which the mesh was refined, was used to precisely simulate excavation of the underground powerhouse. The displacement boundary of the small model used the result of the large model, which was interpolated with numerical inverse isoparametric mapping. Stability of a ground powerhouse in softhard interlayered rock mass was analyzed with elasticplasticbrittle theory. The effect of replacement of soft rock P31qand Huanglong shear zone was emphatically analyzed, and the layout of the underground powerhouse and replacement of soft rock were suggested. 

关 键 词：水布垭电站 地下厂房 软岩置换 稳定性分祈 等参逆变换 弹塑脆性理论 

分 类 号：TV223.3[水利工程—水工结构工程]