红黏土地基承载力和变形参数的空间分布特征分析

为了获得红黏土地基承载力和变形参数在横向和垂向上的定量数据及分析它们的变化规律，选取厦门至成都高速公路湖南省郴州段典型横纵断面上的红黏土地层作为试验点，采用平板载荷试验、旁压试验等技术手段进行了原位测试。试验结果表明：红黏土地基承载力和变形模量在横向较小的范围内呈现较大幅度的变化，在垂向上则呈现先增大再减小的变化趋势，与红黏土赋存厚度、地形地貌、含水率等相关；旁压试验所测得的承载力特征值和平板载荷试验测得的承载力特征值之间存在一定的差异性；旁压模量与变形模量可以通过结构性系数联系起来，所得的结构性系数与Menard根据大量黏土试验资料对比所得到的结论较为一致。

Research on distribution characteristics of bearing capacities and deformation parameters of laterite ground

A number of different in-situ soil tests, such as plate loading test and pressuremeter test, have been carried out to get the regularity of bearing capacities and deformation parameters on horizontal and vertical variations of the laterite ground. The experimental results indicate that the horizontal and vertical foundation bearing capacity and deformation modulus of the laterite ground variate with the changes of depth, thickness, topography, water content and other factors; and vertical bearing capacity and deformation modulus were increased first and then decreased. The bearing capacities measured by pressuremeter test and by the plate loading test had shown some differences. The pressuremeter modulus and the deformation modulus could be associated with soil structural coefficient; and they were consistent with the Menard’s conclusion which based on a large number of clay test data.