American Society of Civil Engineers


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)
Section: Soil Behavior and Laboratory Testing, pp. 27-32, (doi:  http://dx.doi.org/10.1061/41044(351)5)

     Access full text
     Purchase Subscription
     Permissions for Reuse  

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.


ASCE Subject Headings:
Experimentation
Soil consolidation
Expansive soils
Unsaturated soils
Soil compaction