压实花岗土的试验研究

TESTING STUDY ON COMPACTED DECOMPOSED GRANITE SOIL

对压实花岗土进行了三轴固结排水试验、复合应力路径试验、p 定值试验和h 定值试验。并利用Yasufuku模型对试验结果进行了预测比较。试验及预测结果表明,利用Yasufuku模型预测的结果与实测结果基本一致,但在h 定值试验中显现出了一定的出入。

The geotechnical properties of decomposed granite soil are very different depending on the property of parent rock and the degree of weathering. This kind of soil is unstable physically and chemically. In this paper,in order to evaluate the stress-strain behavious of decomposed granite soil,the mechanical properties are first investigated and discussed by carrying out a series of triaxial compression tests,and then an isotropic elasto-plastic model is proposed. The model contains eight experimental parameters which are not only easily determined from a few conventional triaxial tests but also have a clear physical meaning. The predicted behaviours for drained triaxial tests of a few kinds of compacted decomposed granite soil are in good agreement with experimental data.