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水泥土搅拌桩处理地基在实际工程中应用广泛。在地基设计中,往往期望能确定最优的桩距以简化施工工艺和节省工程成本,因此,桩距的最优化选择在工程中较为重要。搅拌桩处理地基主要运用复合地基理论,首先假设桩土变形协调,将三维问题简化为二维平面问题,把桩沿里程方向的桩土简化为等效体,加固后的桩间土体等效为一个整体;其次,由面积置换率算出复合地基的弹性参数,利用相关的有限元软件,模拟计算不同桩距下路基的沉降关系曲线;最后,通过对不同桩间下土体的沉降分析,得出搅拌桩最优桩距选择的一般化方法。
Cement soil mixing pile foundation in the practical application of a wide range of applications. In foundation design, it is often expected to determine the optimal pile spacing in order to simplify the construction process and save the project cost. Therefore, the optimal choice of pile spacing is more important in engineering. Firstly, assuming the deformation of pile-soil is coordinated, the three-dimensional problem is reduced to two-dimensional plane problem, and the pile-soil along the mileage direction is simplified as the equivalent body. The soil between the piles is equivalent As a whole. Secondly, calculate the elastic parameters of the composite foundation from the area replacement rate, and use the related finite element software to simulate the settlement curve of the subgrade under different pile spacing. Finally, through the analysis of settlement under different piles, The general method of choosing the optimal pile spacing of mixing pile is obtained.