The Formation and Geo-Mechanical Property Research of the Xiaozhongdian Lacustrine Clay in NW Yunnan

摘要：

　　The Xiaozhongdian Basin is a NNW directed fault depression basin which was shaped while the Qinghai-Tibet plateau intensely upheaved since the end of the Pliocene epoch,where the lacustrine clay of the middle and late Pleistocene is well distributed from the Xiaozhongdian river section.The Yunnan-Tibet railway will pass through the Xiaozhongdian basin.The lacustrine clay is above ten meters,where the nature is obviously pure,and it has texture layer from the outcrop of the Xiaozhongdian.The laboratory testing results indicate that the Xiaozhongdian lacustrine clay is a clay of high dispersing,high liquid limit,high plastic limit and high porosity ratio,which shear strength is high,and of low expansion or middle expansion,so that the engineering property is better.The slope will be destroyed when it counters alternation of wetting and drying.The author based on the field geology investigation and the laboratory testing results,emphatically analysis the distributing characteristic,the formation time,and the engineering geology characteristic of the Xiaozhongdian lacustrine clay.

关键词： NW Yunnan Xiaozhongdian basin Yunnan-Tibet railway Lacustrine clay Engineering geology characteristic

作者: Changbao GUO Yongshuang ZHANG Sufen WANG Yongxin QU Xitao ZHAO

作者单位: Institute of Geomechanics,Chinese Academy of Geological Sciences,Beijing 100081,P.R.China;China Inst Institute of Geomechanics,Chinese Academy of Geological Sciences,Beijing 100081,P.R.China Apex solutions,inc,Beijing 100016,P.R.China Institute of Geology & Geophysics,Chinese Academy of Sciences,Beijing 100029,P.R.China

会议类型: 国际会议

会议名称: The 2nd China-Japan Graduate Student Forum -- Life, Environment and Energy (第二届中日研究生论坛--生命,环境与能源)

会议地点: 北京

会议语种:英文

页码: 406-416

在线出版日期: 2009-09-24（万方平台首次上网日期，不代表论文的发表时间）