Experimental Study on K0 Consolidation Behavior of Recompacted Unsaturated Expansive Soil
by Rui Zhang, (Lecturer, School of Communication and Transportation Engineering, Changsha University of Science and Technology, Chiling Road 45#, Changsha, Hunan, China, 410076 E-mail: zr_csust@yahoo.com), Jian Long Zheng, (Professor, Changsha University of Science and Technology, Chiling Road 45#, Changsha, Hunan, China, 410076 E-mail: zjl@csust.edu.cn), and He Ping Yang, (Professor, School of Communication and Transportation Engineering, Changsha University of Science and Technology, Chiling Road 45#, Changsha, Hunan, China, 410076 E-mail: cscuyang@163.com)
pp. 27-32, (doi: http://dx.doi.org/10.1061/41044(351)5)
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| Document type: |
Conference Proceeding Paper |
| Part of: |
Recent Advancement in Soil Behavior, in Situ Test Methods, Pile Foundations, and Tunneling: Selected Papers from the 2009 GeoHunan International Conference |
| Abstract: |
To investigate the variation of K0, the coefficient of lateral earth pressure at rest, with initial saturation degree (Sr) and constant radial stress (σrc), a series of K0 consolidation tests were conducted on expansive soil samples under different saturation and stress conditions using a stress-path triaxial system equipped with Hall-effect transducer. The coefficient K0 of every sample were obtained by strictly confining radial strain and evenly increasing radial stress to a given value with a slow and steady speed. The test results showed that the curve axial stress-radial stress exhibits nonlinear under small saturation degree; K0 of samples in different saturation and stress state ranged from 0.22 to 0.72 and increased with increase of initial saturation degree and radial stress. |
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