高速铁路CFG桩复合地基处理方案数值模拟

Numerical Simulation of Composite Ground Treatment Methods with CFG Piles on High-speed Railway

采用有限元分析软件对CFG桩复合地基特性进行了研究,分析了不同的复合地基处理方案,如水泥土、桩帽网、和桩板方案对沉降规律和桩土应力比的影响.研究表明:复合地基处理方案为水泥土方案时路基沉降量最大、桩土应力比最小,地基面有明显沉降盆;桩板方案时路基沉降量最小、桩土应力比最大、地基面沉降更加均匀.

The characteristics of composite foundation with CFG piles are studied by finite element analyzing software, and various ground treatment methods are analyzed, such as cement-soil, pile-hat-net and pile-plank, to compare the differences of the rules of settlement and the ratio of the stress of pile and soil. It is indicated by study that the settlement of subgrade is the most but the ratio of the stress of pile and soil is the least and there will be a basin of settlement on the surface of subgrade when the subgrade is treated with cement-soil ; while the settlement of subgrade is the least but the ratio of the stress of pile and soil is the most and the settlement on the surface of subgrade will be more regular when the subgrade is treated with pile-plank.