苏州黏土的力学特性

为了研究结构性对土的力学特性的影响，对苏州黏土的原状样和人工制备样进行等向压缩试验、三轴固结排水剪切试验和不排水剪切试验.试验结果表明：在固结压力相同时，原状样比人工制备样具有更大的孔隙比、压缩指数C_c和膨胀指数C_s；剪切时的围压对人工制备样的应力比-应变曲线没有影响，而对原状样的应力-应变曲线有影响，即剪切围压小的试样得到的应力比较高；排水剪切围压相同时，人工制备样的强度高于原状样的强度，这是由于原状样的孔隙比大于人工制备样的孔隙比；孔隙比相同时，原状样的强度比人工制备样的要高.

Mechanical Behavior of Suzhou Clay

A number of isotropic compression and consolidated-drained and undrained triaxial tests on undisturbed and reconstituted Suzhou clay have been carried out to study the compression and shear characteristics.The comparison of compression curves of undisturbed and reconstituted samples shows that the undisturbed samples have larger void ratio,compression index and swell index under the same confining pressure.The comparison of stress ratio-strain curves of undisturbed and reconstituted samples shows that the confining pressure has no effect on the reconstituted samples but has an effect on the undisturbed samples.In other words,the stress ratio is high with shearing at the low confining pressure.Also,strength of undisturbed samples is lower than the reconstituted samples when sheared under the same confining pressure.This behavior is caused by the difference in void ratio.