胶结土力学特性与强度分析

Analysis of Mechanical Properties and Strength of Cemented Soils

通过对土料人工处理,可以使其力学特性和强度大为提高,从而有助于建筑物的兴建。通过添加不同含量的水泥,制备了人工胶结土样。然后进行了三轴试验来探讨胶结土的力学特性和强度特点,试验结果表明水泥含量不同导致的颗粒胶结对胶结土的应力—应变、孔压发展、体积变形特性和抗剪强度有很大的影响。最后建议了一个胶结土的抗剪强度表达式,并与实验结果进行对比,表明所建议的抗剪强度表达式具有较好的适用性。

Treated by adding some kinds of cemented materials,the soils will have better mechanical features and higher strength,contributing to the construction of buildings.The cemented soil samples,prepared artificially with addition of some different contents of cement into the original soil materials here,are sheared under triaxial stress conditions.The mechanical characteristics and strength mechanism of the cemented soils are investigated and it indicates experimentally that the cementation between soil particles has great influence on the stress-strain,pore pressure development,volumetric deformation and shear strength of the soil samples.Finally,a new shear strength criterion of the cemented soils is proposed based on the strength mechanism and it agrees well with the experimental results of the cemented soils.