Suction of Unsaturated Loess and Shear Strength of the Test Study

doi:10.3969 /j.issn.1674-0696.2013.05.17

Journal of Chongqing Jiaotong University(Natural Science) ›› 2013, Vol. 32 ›› Issue (5): 974-978.DOI: 10.3969 /j.issn.1674-0696.2013.05.17

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Suction of Unsaturated Loess and Shear Strength of the Test Study

Yuan Kangfeng，Su Zhongming，Sun Zhijie

Key Laboratory of Highway Construction ＆ Maintenance Technology in Loess Ｒegion of Transport Industry， Shanxi Provincial Ｒesearch Institute of Communications，Taiyuan 030006，Shanxi，China

Received:2012-08-23 Revised:2012-10-08 Online:2013-10-15 Published:2014-10-27

非饱和黄土吸力与抗剪强度的试验研究

员康锋，宿钟鸣，孙志杰

山西省交通科学研究院黄土地区公路建设与养护技术交通行业重点实验室，山西太原030006

作者简介:员康锋( 1984—) ，男，山西运城人，硕士，从事黄土力学及数值模拟方面的研究。E-mail: yuankangfeng@163． com。

Abstract

Abstract: According to the tri-axial test of drainage control suction collapsible loess in Shanxi and the suction is controlled in two phases of consolidation and shear，the law of suction for the strength of collapsible loess was studied． The results show that the consolidation of soil volume increases with the increase of confined pressure，but reduces with the increase of suction; effective stress strength index c increases with the increase of suction; however，effective stress strength index φ basically keeps the same with the increase of suction force． Adsorption strength increases with the increase of matrix suction，but there is an extreme value．

Key words: controlled suction, consolidation drained, adsorption strength

摘要： 针对山西湿陷性黄土进行固结排水控制吸力三轴试验，而且在固结和剪切两个阶段都进行吸力的控制，研究吸力对湿陷性黄土强度的影响规律。试验结果表明: 土体的固结体变随围压的增大而增加，随吸力的增大反而减小; 有效应力强度参数c 随吸力增大而增大，而有效应力强度参数φ 随吸力的增大基本上不变; 吸附强度随基质吸力的增大而增大，但存在极值。

关键词: 控制吸力, 固结排水, 吸附强度

CLC Number:

TU411.7

Yuan Kangfeng，Su Zhongming，Sun Zhijie. Suction of Unsaturated Loess and Shear Strength of the Test Study[J]. Journal of Chongqing Jiaotong University(Natural Science), 2013, 32(5): 974-978.

员康锋，宿钟鸣，孙志杰. 非饱和黄土吸力与抗剪强度的试验研究[J]. 重庆交通大学学报（自然科学版）, 2013, 32(5): 974-978.

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Suction of Unsaturated Loess and Shear Strength of the Test Study

非饱和黄土吸力与抗剪强度的试验研究

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