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Experimental study on dynamic properties of soft soil treated with lime under cyclic loading

HE Jian-qing~(1,2), ZHANG Jia-sheng~2(1. Civiling School of Cenlral South University, Changsha 410075, China; 2. School of Civil Engineering, Hunan Universily of Science and Technology, Xiangtan 411201, China)  
Based on a lot of dynamic tri-axial tests, dynamic properties of lime soils were thoroughly studied. Among many factors affecting dynamic modulus and damping ratio, dynamic strain was the most important one. Dynamic modulus E_d decreases and damping ratio increases very rapidly with the increase of dynamic strain. Both dynamic modulus and damping ratio increase with the increase of Lime dosage ratio. Dynamic modulus increases while damping ratio decreases as the confining pressure increases at the same strain level. It is found that the maximum dynamic modulus Edmax increases in the relation of exponential function to confining pressure. The maximum damping ratio varies from 7% to 40%; it decreases in the relation of exponential function to confining pressure, and the corresponding formula is put forward. 10figs., 4tabs., 14refs.
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