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《Highway》 2005-11
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A Study on Origin of Loess Caves in Loessal Plateau

LI Xi-an~(1,2),PENG Jian-bing~(2),ZHENG Shu-yan~(2),CHEN Zhi-xin~(2),TIAN An-jia~(3)(1.National Laboratory of Geo-hazards Prevention and Geo-environment Protection,Chengdu University of Science and Engineering,Chengdu 610059,China;2.Geology Engineering and Surveying Department,Chang'an University,Xi'an 710054,China;3.214 Geology Team of Yudou Road,Yuncheng City of Shanxi Province,Yuncheng 044000,China)  
On the basis of the field survey and statistic,the causes of loess caves in the loessal plateau are studied in this paper.Result shows that the controlling causes of loess caves include the thickness of the loess layer,loess quality,structure,land form,hydrology,geology and climatic conditions, of which the loess quality,thickness of the loessal layer as well as their combinations formed the bases of loess caves.Loess caves of different depths have different main causes.The cause of superficial loess caves is related to biologic activities,of shallow layer caves to their differentiation of the anti-water erosion ability as well as the fissures inside,of middle layer caves to the fissures inside,and of deep and extra deep layer caves to the tectonic joint.
【Fund】: 交通部西部重点交通建设科技攻关项目:200131881213
【CateGory Index】: U416.169
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