碎石桩联合土工格栅复合地基处理湿地软基的机制研究

Mechanism of composite ground with stone columns and geogrid in wetland

高原湿地软基的突出特点是含有地质条件很差的泥炭层。采用碎石桩联合土工格栅复合地基处理湿地软基是一个新的尝试。在有限元分析的基础上,给出了碎石桩联合土工格栅复合地基处理高原湿地软基的受力、变形特征与作用机制,结果表明,碎石桩可以加快软基的排水固结,提高地基的承载力,土工格栅的主要作用在于限制路堤的侧向位移和减小差异沉降。

The outstanding feature of soft ground in plateau wetland consists in peat bed of which engineering geologic condition is very weak. Based on the main features of soft ground in plateau wetland, using stone column and geogrid to treat the soft ground is an innovation. Based on FEM, the deformation characteristics and the mechanism of composite ground with stone columns and geogrid in plateau wetland are given. The results indicate that the stone column can expedite the process of drainage consolidation and enhance the beating capacity of ground. The main effects of the geogrid are to restrict the lateral displacements and to dwindle differential settlements of the embankment.