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 softhard interlayered rock mass was analyzed with elasticplasticbrittle theory. The effect of replacement of soft rock P31qand Huanglong shear zone was emphatically analyzed, and the layout of the underground powerhouse and replacement of soft rock were suggested.
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2003年第4期463-467,共5页
Chinese Journal of Geotechnical Engineering
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
numerical inverse isoparametric mapping
elastic-plastic-brittle theory
soft rock replacement
ground powerhouse
stability analysis
