CFG桩湿陷性黄土地基物理力学性质研究

目前高速铁路在基础设计方面存在两种主流方法，填方路基和桥墩路基。分析两种方式的利弊，阐述了经济效益好的填方路基处理前后其基本物理力学指标：密度、含水量、液限、塑限、粘聚力以及内摩擦角等的响应情况。讨论分析了湿陷性因素及经过CFG桩等处理后沉降的变化情况，阐明了基本物理力学指标之间的关系及湿陷性的影响因素和沉降的控制情况，为后期的研究提供本质的理论依据。

Research on the Physical and Mechanical Properties of CFG Pile with Collapsibility Processing

At present, the foundation design of the high speed rail mainly exits two kinds of methods： filling subgrade construction and bridge pier roadbed. The advantages and disadvantages of the two ways are analyzed. The basic physical mechanics index of the filling subgrade construction with good economic performance before and after processing is expounded, which includes density, water content, liquid limit, plastic limit, internal cohesion, the response of internal friction angle. The coefficient of collapsibility and the sedimentation changes after CFG pile settlement are analyzed. The relationship between the basic the physical and mechanical indexes, the influence factors of the collapsibility and control of settlement are illustrated, which provides the theory basis for the Late-stage research.