【作者】 贠麦平；

【导师】 韩晓雷；

【作者基本信息】 西安建筑科技大学 ， 岩土工程， 2004， 硕士

【摘要】 随着我国对西部地区开发力度的加强，湿陷性黄土地区工程建设速度近年来有了很大的提高。因此，对湿陷性黄土的土性及处理方法的研究不仅在理论上具有一定意义，而且具有重要的工程实践意义。 本文正是基于此，针对西部地区尤其是陕西关中、陕北地区、豫西地区最为广泛采用的两种处理湿陷性黄土的方法—灰土垫层及灰土挤密桩展开研究。首先，通过室内试验，对不同灰土配合比、不同含水量的灰土试样进行近九个月的持续时间的无侧限强度试验，得到了灰土强度与龄期、含水量及灰土配合比之间的一些规律，并从围观机理入手，对灰土强度变化作了一定的理论解释。同时通过室内试验确定了特定区域黄土的邓肯-张模型参数和黄土挤密模型，采用Fortran Power Station，按轴对称问题编制了存限元程序，通过采用不同的挤压力和不同的泊松比的程序试算，得到了一些桩周土体的应力变化规律，并对挤密桩破坏半径内的土体挤密效果进行了判定，计算与分析结果可供设计施工人员参考。更多还原

【Abstract】 With the improvement of the west-china development, capital construction Project in collapsible loess areas had been increased greatly in resent years. So it is very importance to research on the properties and the methods of subsoil treatment of collapsible loess, not only in theory, but also in project practice.Based upon this, researched on the lime-loess cushion and the lime-soil compaction pile, the two methods of subsoil treatment is the most widespread incollapsible loess areas, specially in Shanxi Guan Zhong and Shanbei and Yu Xi. In the first place, through the long lasting laboratory soil test, the strengh propetty of the lime-loess with different water content and line content varying with time was analyzed. The principal factors influencing the lime-loess strength and some laws were developed. The secondly, based upon the laboratory soil tests, definite the parameter of the Kondner model and the loess compaction model, using Fortran Power Station to compile the finite element programmed of axial symmetry. Through trial calculate with the different squeeze stress and different poisson ratio, got some laws of stress of soil surrounding pile and judged the result of compaction pile. The result of the calculation and analysis and valuable to designer and builder.更多还原