Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Earth Science》 2017-12
Add to Favorite Get Latest Update

Characteristics of the Groundwater Seepage and Failure Mechanisms of Landslide Induced by Typhoon Rainstorm

Zhang Taili;Zhou Aiguo;Sun Qiang;Wu Jianbo;Wang Hesheng;Liu Zhenghua;School of Environment,China University of Geosciences;Nanjing Center,China Geological Survey;Zhejiang Institute of Geo-Environment Monitoring;  
Typhoon rainstorm usually causes a large number of landslides leading to property and life losses.The research on the characteristics of groundwater seepage and genetic mechanism of landslides,therefore,is of great significance in early warning and forecasting of typhoon-induced-landslide.Taking Zhonglincun landslide located in Zhejiang province as an example,the paper used finite element method to simulate the transient seepage field and stability of the landslide under two conditions including rainfalls with constant intensity of 200 mm/d and gradually increased intensity.The results showed that the characteristics of groundwater seepage under both conditions were almost the same.The groundwater level responded rapidly and finally approached near the contact between strongly and moderately weathered strata,in addition,the ground water overflowed from the slope toe.The rising speed of groundwater level,however,was faster and the range was larger under the first condition.The factor of safety was closely related to the ground water level and rainfall intensity.Under the former condition,factor of safety decreased rapidly with increased water level,the falling speed slowed down after the water level became roughly stable.Failure mode of the Zhonglincun landslide can be summed up as creep-crack and slide-crack-creep,while rise of water table,decrease of matrix suction and increase of pore pressure in the slope were the main reasons leading to the failure of Zhonglincunlandslide.
【Fund】: 中国地质大调查项目(Nos.1212011140010 DD20160282)
【CateGory Index】: P641.2;P642.22
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved