INFLUENCE OF DURATION OF SUCTION EQUALIZATION ON SUBSEQUENT SHEARING OF AN UNSATURATED SOIL
A series of direct shear tests were performed to investigate the influence of duration of suction equalization on subsequent shear behaviour of an expansive clay. Soil specimen was prepared at a high suction and then lowered to a smaller value under different durations of suction equalization. Test results show that shorter duration of suction equalization resulted in higher strength and more dilative behaviour during shearing. The influence of duration of suction equalization on shear behaviour is believed to be caused by the difference between suction in soil specimen and applied suction externally. Shorter duration of suction equalization resulted in smaller degree of saturation, leading to higher suction in soil specimen. The higher suction made the soil specimen to exhibit more dilative behaviour and higher strength. Therefore, it is vital to obtain suction equalization before shear.
R.Chen C.W.W.Ng
Department of Civil Engineering, The Hong Kong University of Science and Technology, HKSAR,P.R.China
国际会议
南京
英文
457-462
2007-04-21（万方平台首次上网日期，不代表论文的发表时间）