Research on strain regularity of three-dimensional stress of Hefei remolded expansive clay
CHI Zecheng1，2，CHEN Shanxiong2，DAI Zhangjun1，2，ZHOU Zhe1，2，SONG Ruijun1，2
(1. University of Chinese Academy of Sciences，Beijing 100049，China；2. State Key Laboratory of Geomechanics and Geotechnical Engineering，Institute of Rock and Soil Mechanics，Chinese Academy of Sciences，Wuhan，Hubei 430071，China)
This paper studies the characteristic of remolded expansive clay in Hefei. A series of three-dimensional swelling tests were conducted for cubic expansive soil of different initial moisture contents and dry density as well as the swelling pressure tests under the control of the vertical strain and the lateral strain. The vertical swelling pressure is always bigger than lateral swelling pressure. Moreover，the range of R0 change is between 0.525 and 0.904. Secondly，under the same initial moisture contents，R0 will increase with the rise of dry density. At last，the study shows that the trends of evolution of swelling pressure under the control of the vertical strain and the evolution of the lateral swelling pressure under the control of the lateral strain are similar. The tiny strain would lead to the dramatic decrease of swelling pressure. Moreover，with the decline of the strain，the rate of decay of swelling pressure will increase.
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2018, Vol. 37 
