用地应力实测结果反演华北地区构造应力场
THE INVERSION OF TECTONIC STRESS FIELD IN NORTH CHINA FROM ACTUAL STRESS MEASUREMENTS
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摘要: 本文是以华北地区地应力实测结果,采用有限单元计算方法反演华北地区构造应力场。确定较符合该地区的边界外力为北东70°和近东西方向;确定最大主应力集中区,最大剪切应力集中区和最大主应力作用下的断层。为华北地区应力场分析;为继续进行的地应力测量点的选择,以及研究该区断层活动情况提供参考资料。Abstract: In this paper the tectonic stress field in North China is inversed from the actual str-ess measurements by the finite element method.It has been determined that the external forces of this area are N70°E and nearly E-W.In addition, the maximum principal stre-ss concentration zone, the maximum shear stress concentration zone and faults under the maximum principal stress are also pointed out.These data can be used as a reference for analyzing the stress field in North China and selecting the measuring points in further stress measurement as well as investigating the fault activity in this area.
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