Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Journal of Glaciology and Geocryology》 2006-01
Add to Favorite Get Latest Update

Forming Mechanism of Embankment Longitudinal Cracks in Permafrost Regions

PEI Jian-zhong, DOU Min-jian, HU Chang-shun, WANG Bin-gang(Key Laboratory for Special Area Highway Engineering of Ministry of Education,Chang'an University,Xi'an Shaanxi 710064,China)  
There are many longitudinal cracks in the embankments in permafrost regions,which are widespread and difficult to control.In this paper,on the basis of investigation,together with analyses of deformation characteristics and embankment temperature regimes,the main reasons for forming longitudinal crack are attributed to the unstable area under the slope foot of an embankment,and a new model for analyzing the mechanism is presented.Through an analysis with FEM of elastic-plastic theory,the deformation and strain variations in an embankment are studied,and then three phases of the forming course are puts forward,i.e.,the initial deformation phase,strength decrease phase and a phase of failure in stability.Corresponsively,there are three zones with different characteristics within the embankment and roadbed,i.e.,developing zone,restraint zone and inducement zone.Study of the mechanism of longitudinal cracks is helpful to take measures against the cracks.
【Fund】: 国家自然科学基金项目(50178010)资助
【CateGory Index】: U416.168
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