构造节理对黄土地区滑坡的控制作用——以陕西省吴起县为例  

Control Effect of Tectonic Joint on Landslide in Loess Area: Take Wuqi County of Shaanxi Province as Example

作　　者：索俊峰 赵法锁[1] 祝俊华 杜长城 郭子正[2] Suo Junfeng;Zhao Fasuo;Zhu Junhua;Du Changcheng;Guo Zizheng(School of Geological Engineering and Surveying and Mapping,Chang an University,Xi an 710054,China;Faculty of Engineering,China University of Geosciences,Wuhan 430074,China)

机构地区：[1]长安大学地质工程与测绘学院,陕西西安710054 [2]中国地质大学(武汉)工程学院,湖北武汉430074

出　　处：《甘肃科学学报》2019年第3期59-67,共9页Journal of Gansu Sciences

基　　金：国家自然科学基金(41877274)

摘　　要：黄土滑坡是我国西部地区主要的地质灾害,正确分析其影响因素对于滑坡的防治具有重要意义。为探究构造节理对黄土地区滑坡的控制作用,以陕西省吴起县为例,首先基于详细的野外调查资料介绍了区内滑坡的分布情况及构造节理特征,然后从物理力学性质和渗流2个方面分析了构造节理对黄土滑坡的影响机制。再结合摩尔-库伦强度理论和极限平衡条件,分别建立了构造节理面倾角大于坡角和小于坡角2种情况下的边坡稳定性计算公式,定量探讨了节理倾角与黄土斜坡稳定性的变化关系。最后根据分析结果对该县受构造节理影响的斜坡提出了一定的防治措施。该研究成果对黄土地区滑坡灾害的防治具有一定的参考价值。As loess landslide is the major geological disaster in western China,the correct analysis of its influence factors plays a significant role in the prevention and control of landslide.To probe into the control effect of tectonic joint on landslide in loess area,with Wuqi County as an example and on the basis of filed investigation data,the article introduces the landslide distribution and features of tectonic joint within the loess area and analyzes the influencing mechanism of tectonic joint on loess landslide from the aspects of physico-mechanical properties and seepage force.In combination with the Mohr-Coulomb theory,the article establishes the slope stability calculation formula with tectonic joint dip angle larger or smaller than the slope angle,and quantificationally discusses the variation relations between tectonic joint dip angle and slope stability.At last,according to the analysis result,the article puts forward the prevention and control measures for the slopes under the influence of tectonic joint.The research result is of certain reference value for the prevention and control of landslide in loess area.

关 键 词：黄土地区 构造节理 滑坡 稳定性 倾角 防治 

分 类 号：P642[天文地球—工程地质学]