Development characteristics and formation analysis of the Liangjia Village earth fissure in the Weihe Basin,China

Junhua Zhu; Jianwei Qiao; Feiyong Wang; Quanzhong Lu; Yuyun Xia; Ransheng Chen; Haiyuan Zhao; Jingliang Dong

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Development characteristics and formation analysis of the Liangjia Village earth fissure in the Weihe Basin,China

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Liangjia Village earth fissure,one of the 79 earth fissures along the Kouzhen-Guanshan fault located in the northern Weihe Basin,causes severe damage to buildings and farmlands.Since the late 1950s,40 earth fissures have occurred in a similar east-west(EW)direction parallel to the Kouzhen-Guanshan fault,and a further 39 earth fissures have occurred with north-west,east-north,or north-east orientations intersecting the fault.In this study,a case study of Liangjia Village earth fissure was conducted to investigate the mechanisms of fissure generation in detail.Geotechnical and geophysical methods including measurements,trenching,drilling,and seismic exploration were used to reveal the basic characteristics,geological background,and origin model of the Liangjia Village earth fissure.This earth fissure,with a total length of 800 m in 2014,runs EW parallel to the Kouzhen-Guanshan fault,and it has damaged buildings and farmlands by forming sinkholes,gullies,subsidence,and a scarp.The trenching results indicated that this fissure underwent multi-phase activity.Analysis of geological drilling and shallow seismic profiling results showed that the fissure also possessed characteristics of a synsedimentary fault.Regarding its genesis,the fissure was formed through the combined actions of three factors:an earthquake created the fissure,the Kouzhen-Guanshan fault controlled its development,and loess erosion and groundwater runoff subsequently enlarged the fissure.Regional extension first generated many buried faults along the hanging wall of the Kouzhen-Guanshan fault before seismic activity caused the buried faults to propagate to the surface,where loess erosion and ground-water runoff promoted the formation of the current earth fissure.

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《地球科学前沿：英文版》 |2020年第4期|P.758-769|共12页
作者
Junhua Zhu; Jianwei Qiao; Feiyong Wang; Quanzhong Lu; Yuyun Xia; Ransheng Chen; Haiyuan Zhao; Jingliang Dong;
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作者单位

School of Civil Engineering and Architecture East China Jiaotong University Nanchang 330013 ChinaNational Experimental Teaching Demonstration Center of Civil Engineering East China Jiaotong University Nanchang 330013 China;

China Jikan Research Institute of Engineering Investigations and Design Co. Ltd. Xi’an 710043 ChinaShaanxi Key Laboratory for the Property and Treatment of Special Soil and Rock Xi’an 710043 China;

School of Geological Engineering and Geomatics Chang’an University Xi’an 710054 China;

School of Geological Engineering and Geomatics Chang’an University Xi’an 710054 China;

China Jikan Research Institute of Engineering Investigations and Design Co. Ltd. Xi’an 710043 ChinaShaanxi Key Laboratory for the Property and Treatment of Special Soil and Rock Xi’an 710043 China;

China Jikan Research Institute of Engineering Investigations and Design Co. Ltd. Xi’an 710043 ChinaShaanxi Key Laboratory for the Property and Treatment of Special Soil and Rock Xi’an 710043 China;

China Jikan Research Institute of Engineering Investigations and Design Co. Ltd. Xi’an 710043 China;

School of Civil Engineering and Architecture East China Jiaotong University Nanchang 330013 ChinaNational Experimental Teaching Demonstration Center of Civil Engineering East China Jiaotong University Nanchang 330013 China;

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原文格式 PDF
正文语种 chi
中图分类大地（岩石界）物理学（固体地球物理学）;
关键词
earth fissure; Kouzhen-Guanshan fault; earthquake; creep slip; loess erosion;

机译：地球裂缝;kouzhen-guanshan断层;地震;蠕变溜滑;黄土侵蚀;

Development characteristics and formation analysis of the Liangjia Village earth fissure in the Weihe Basin,China

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