基于新构造应力场的巫山境内滑坡宏观发育规律研究

A study of the macroscopic development rules of landslides in Wushan: a perspective of new tectonic stress field

为了对巫山县区域的滑坡宏观发育规律进行研究,运用Scheidegger法对重庆市巫山境内的新构造应力场和水系分布情况进行了分析研究。研究表明,巫山境内的主压应力场方向为53°,MaxⅠ18°和MaxⅡ88°是新构造应力场的两个优势剪切分布带。而境内滑坡主要沿53°和143°方向分布,与地应力场的两组剪切带很相近,占统计灾害的66.7%。分析认为,区域内地质灾害的运动方向与新构造应力场之间有密切的关系。

On the basis of analyzing the new tectonic stress field and the distribution of water systems in Wu-shan,Chongqing,this paper studies the macroscopic development rules of the regional landslides by using the Scheidegger method.The study shows that the direction of the main pressure stress field is 53°;Max Ⅰ 18° and Max Ⅱ 88° are two dominating shear distribution zones of the new tectonic stress field;the distribution of landslides is mainly along the directions of 53 ° and 143 °,which are close to the two groups of the shear zones;the landslides of this kind amount to 66.7% of the statistical disasters.The study also shows that the movement direction of geological disasters is closely related to the new tectonic stress field in this region.