周宁电站厂房区三维地应力场非线性数值拟合分析及其开挖效应研究  

Study of Three-Dimensional Geostress Field Nonlinear Numerical Fitting Analysis and Excavation Effect for the Workshop of Zhouning Hydropower Station

作　　者：孙少锐[1] 吴继敏[1] 魏继红[1] 施志群[2] 唐新华[2] 

机构地区：[1]河海大学土木工程学院,南京市210098 [2]福建省水利水电勘测设计研究院,福州市350001

出　　处：《勘察科学技术》2003年第1期6-10,共5页Site Investigation Science and Technology

摘　　要：根据三维地应力场的非线性数值拟合原理 ,介绍了地应力场的模拟方法 ,采用非线性数值拟合法解决了地应力实测值离散性较大的问题 ,同时 ,分析了地下洞室一次开挖与分次开挖对应力场的影响。计算结果表明 ,较好地反映了该地区的地应力情况 。In accordance with the principle of nonlinear numerical fitting for three-dimensional geostress field, the simulation method of geostress field is introduced firstly. The problem concerning considerable straggling of the measured values of geostress has been solved by adopting the nonlinear numerical fitting, meanwhile the effect of excavations by once and three times for underground cavern on geostress field is analyzed. The calculating results show that the stress condition of the area has been fafourably reflected, and the theoretical basis of reasonably directing the excavation is presented as well.

关 键 词：地应力场 函数拟合 非线性有限元 洞室开挖 自重应力场 

分 类 号：P642[天文地球—工程地质学]