摘要
以现场实测地应力资料为依据,结合震源机制解方法,对某水电站右岸实测地应力场进行了分析,拟合了地应力场的数学表达式,并推演研究了工程区域地应力场的分布特征,结果表明:某水电站工程区域位于高山峡谷地带,经历了多次构造运动,地应力场主要受区域构造运动的影响,这种影响对水平方向的构造应力尤为剧烈;工程区域地应力场总体表现为竖直应力略小于自重应力,最大水平主应力以构造应力为主,其值约为20 MPa。
Based on the measured in - situ stress data and the focal mechanism solution method, the measured in - situ stress field in the right bank of a hydropower station is analyzed and the mathematical expression of the in - situ stress field is fitted. The distribution characteristics of in - situ stress field in the project area are derived. The results show that： the hydropower pro- ject is located at the gorge region and has experienced tectonic movements for many times ; the in - situ stress field is mainly affected by tectonic movements, and this influence on horizontal tectonic stress is particularly severe; the vertical stress is slightly smaller than the weight stress; the maximum principal horizontal stress is mainly tectonic stress, and its value is about 20 MPa.
出处
《人民长江》
北大核心
2012年第13期32-34,65,共4页
Yangtze River
关键词
应力场
震源机制解
构造应力
水电站
in - situ stress fields
focal mechanism solution
tectonic stress
hydropower station
