黄土湿陷性对西白地裂缝的影响  

Influence of Loess Collapsibility on Xibai’s Ground Fissure

作　　者：曹兴 田雷瑜 卢全中[1,2] 杨亚磊 乔建伟[1] Cao Xing;Tian Leiyu;Lu Quanzhong;Yang Yalei;Qiao Jianwei(School of Geological Engineering and Geomatics,Chang'an University,Xi'an 710054,China;Key Laboratory of Western Mineral Resources and Geological Engineering,Ministryof Education of China,Xi'an 710054,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]长安大学西部矿产资源与地质工程教育部重点实验室,陕西西安710054

出　　处：《甘肃科学学报》2020年第1期66-71,共6页Journal of Gansu Sciences

基　　金：国家自然科学基金项目(41877250,41272284);中国地质调查局地质调查项目(12120113004900,DD20160264)

摘　　要：渭河盆地位于黄土高原南部,该盆地广泛分布黄土,到2017年已发现252次裂缝。以西白村地裂缝为例,通过钻探和槽探等一系列地质调查,查明了西白地裂缝的平面展布特征和剖面结构特征;通过黄土湿陷实验分析了由黄土湿陷性对地裂缝所造成的影响,并推测了西白地裂缝的成因发展过程,得出了西白地裂缝的产生是由于污水坑的侧向渗漏和黄土的湿陷性所造成的地面不均匀沉降所造成的。研究揭示了黄土湿陷性地裂缝的发育特征,探讨了其成因机理,为黄土地区地裂缝的防治提供了理论指导。The Weihe Basin is located in the southern part of the Loess Plateau.The basin is widely distributed with loess.By 2017,252 cracks have been discovered.This paper takes the ground crack of Xibai Village as an example.Through a series of geological surveys such as on-site investigation,drilling and trenching,the planar distribution characteristics and profile structure characteristics of the Xibai ground fissures were identified.The effects of loess collapsibility on the ground fissures were analyzed by the loess collapsibility experiment.The cause of the development of the Xibai ground fissure is also inferred.It is concluded that the occurrence of the Xibai ground fissure is caused by the lateral leakage of the sump and the uneven settlement of the ground caused by the collapsibility of the loess.This study reveals the developmental characteristics of collapsible ground fissures in loess,discusses its genetic mechanism,and provides theoretical guidance for the prevention and control of ground fissures in loess areas.

关 键 词：地裂缝 黄土湿陷 发育特征 成因机理 

分 类 号：P642.2[天文地球—工程地质学]