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| PERMEABILITY OF SATURATED SOFT CLAYS AND ITS EFFECTS ON ONE-DIMENSIONAL LARGE STRAIN CONSOLIDATION |
LI Zhihui，CHEN Xiaoping，ZHOU Qiujuan |
(Department of Mechanics and Civil Engineering，Jinan University，Guangzhou，Guangdong 510632，China)
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Abstract Based on laboratory seepage pressure tests of saturated soft clays in Nansha，Guangzhou，the permeability of saturated soft clays under different consolidation and seepage pressures are systematically investigated. The effects of loading and unloading conditions on permeability are analyzed，and experience formulae are given to define void ratio and permeability coefficient. Testing results reveal the permeability law of saturated soft clays under different hydraulic gradients and the seepage failure characteristics. Based on experiments and large strain consolidation equations with displacement as variable，the effects of initial seepage coefficient on large strain consolidation are studied. It is shown that the nonlinear compressibility and permeability need to be considered in large strain consolidation calculation of soft foundation.
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Received: 14 December 2008
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