|Table of Contents|

Test on unsaturatedremoldedcompacted cohesive soil in triaxial condition(PDF)

长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2009年05期
Page:
30-34
Research Field:
Publishing date:
2009-10-20

Info

Title:
Test on unsaturatedremoldedcompacted cohesive soil in triaxial condition
Author(s):
YANG Lingyun1;  WANG Xiaomou1;  LIU Jun2;  LI Guang3
1. School of Highway, Changan University, Xian 710064, Shaanxi, China； 2. Northwest of Institute Survey and Design, Hydro China Corporation, Xian 710065, Shaanxi, China； 3. The Command for Xiangfan—Chongqing Railway Construction, Xian Railway Bureau, Xian 710054, Shaanxi, China
Keywords:
road engineering;  unsaturatedremoldedcompacted cohesive soil;  UU test;  characteristic content of water;  pore air pressure
PACS:
U416.1
DOI:
-
Abstract:
In order to study the compaction properties of clay subgrade in the moist and rainy areas, the UU(unconsolidatedundrained triaxial) tests on different specimens were carried out. Based on the theory of unsaturated soils, the effects of dilatancy are analyzed about the degree of compaction and pore pressure in the shear process. The tests show that the shear dilatancy is related to compactness and confining pressure. Meanwhile, the UU tests show the pore water pressure is negative, air pressure is changed with the changes of shear dilatancy and reduction, and the water pressure first reduces then becomes stable. However when the pore water pressure is positive, the air pressure and water pressure are both changed with the change of shear dilatancy and reduction, and the two pressure curves become parallel. The conclusion is different from that in the past shear dilatancy and reduction is only related to air pressure. 1 tab, 5 figs, 12 refs.

References:

［1］Lambe T W.The engineering behavior of compacted clay［J］.Journal of Soil Mechanics and Foundation Divison, ASCE,1958,84(2):134:
[2]Delage P,Howat M D,Cui Y J.The relationship between suction and swelling properties in a heavily compacted unsaturated clay［J］.Engineering Geology,1998,50(1/2):3148.
[3]程海涛,刘保健,谢永利.重塑黄土变形特性［J］.长安大学学报:自然科学版，2008，28（5）：3134. CHEN Haitao,LIU Baojian,XIE Yongli.Deformation characteristics of remolded loess［J］.Journal of Changan University:Natural Science Edition，2008，28（5）：3134.
[4]Cokca E,Erol O,Armangil F.Effects of compaction moisture content on the shear strength of an unsaturated clay ［J］.Geotechnical and Geological Engineering,2004,22(2)：285297.
[5]王铁行，赵树德.非饱和土体气态水迁移引起的含水量变化方程［J］.中国公路学报，2003,16（2）:1821. WANG Tiehang,ZHAO Shude.Equation for water vapour transfer in unsaturated soil［J］.China Journal of Highway and Transport，2003,16（2）:1821.
[6]李振霞，王选仓,陈渊召，等.膨胀土的强度与力学特性［J］.交通运输工程学报，2008，8（5）:5460. LI Zhenxia,WANG Xuancang,CHEN Yuanzhao,et al.Strength and mechanic property of expansive soil［J］.Journal of Traffic and Transportation Engineering,2008，8（5）:5460.
[7]Fredlund D G,Rahardjo H.Soil mechanics for unsaturated soils ［M］.New York:John Wiley and Sons,1993.
[8]缪林昌,崔颖,陈可君,等.非饱和重塑膨胀土的强度试验研究［J］.岩土工程学报,2006,28(2):274276. MIAO Linchang,CUI Ying,CHEN Kejun,et al.Tests on strength of unsaturated remolded expansive soils［J］.Chinese Journal of Geotechnical Engineering,2006,28(2):274276.
[9]陈正汉,谢定义,王永胜.非饱和土的水气运动规律及其工程性质研究［J］.岩土工程学报,1993,15(3):920. CHEN Zhenghan,XIE Dingyi,WANG Yongsheng.Experimental studies of laws of fluid motion,suction and pore pressures in unsaturated soil ［J］.Chinese Journal of Geotechnical Engineering,1993,15(3):920.
[10]陈正汉.重塑非饱和黄土的变形、强度、屈服和水量变化特性［J］.岩土工程学报,1999，21(1):8290. CHEN Zhenghan.Deformation,strength,yield and moisture change of a remolded unsaturated loess［J］.Chinese Journal of Geotechnical Engineering，1999,21(1):8290.
[11]包承纲．非饱和土的性状及膨胀土边坡稳定问题［J］．岩土工程学报,2004,26(1):115. BAO Chenggang.Behavior of unsaturated soil and stability of expansive soil slope［J］．Chinese Journal of Geotechnical Engineering,2004,26(1):115.
[12]扈胜霞,周云东,陈正汉.非饱和原状黄土强度特性的试验研究［J］.岩土力学，2005,26(4)：660663,672. HU Shengxia,ZHOU Yundong,CHEN Zhenhan.Test study on strength character of unsaturated and undisturbed loess［J］.Rock and Soil Mechanics,2005,26(4)：660663,672.

Memo

Memo:
-
Last Update: 2009-10-20