Frost Heave and Dry Density Changes during Cyclic Freeze-Thaw of a Silty Clay

被引：9
|
作者：
Hui, Bing [1 ]
Ping, He [2 ]
机构：
[1] Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, State Key Lab Frozen Soil Engn, Lanzhou 730000, Gansu, Peoples R China
[2] Beijing Jiaotong Univ, Sch Civil Engn & Architecture, Beijing, Peoples R China
来源：
PERMAFROST AND PERIGLACIAL PROCESSES | 2009年 / 20卷 / 01期
基金：
中国国家自然科学基金;
关键词：
freeze-thaw action; frost heave; dry density; Qinghai-Tibet Railway; ICE LENS FORMATION; VOLUME CHANGES; SOILS;
D O I：
10.1002/ppp.636
中图分类号：
P9 [自然地理学];
学科分类号：
0705 ; 070501 ;
摘要：
Open-system frost heave tests were performed on a silty clay using a lower boundary condition of +2 degrees C and unidirectional freezing at -10 degrees C from the surface, or freezing and thawing with an upper boundary temperature that cycled from -10 degrees C to +10 degrees C or froth -10 degrees C to 0 degrees C. The amount of frost heave, the distribution of moisture at the end of the experiment and the final dry density profiles all differed for the three cases. The experiments demonstrate that freeze-thaw history is important in assessing or predicting the frost heave of silty clays. Copyright (C) 2009 John Wiley & Sons, Ltd.
引用
收藏
页码：65 / 70
页数：6
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