大型群桩-软土共同作用性状研究

The Analysis of Behavior of Large Pile Groups-Soil Interaction

以某水闸工程为研究对象，应用有限元方法对大型群桩与软土地基共同作用性状进行了研究．建立三维非线性有限元模型，通过改变影响沉降参数和桩体布置方式、桩径、桩端土性质等，分析了群桩沉降性状．结果表明，在实际工程中，桩直径以800-1000mm为优，桩端部土体用于持力层的土体弹性模量不宜小于400MPa．

Based on the background and general description of a certain sluice, the finite element method was applied to properties of the large pile group and the soft soil. Parameter analysis of the layout of piles, pile diameter, pileside soil properties were studied with the three dimensional finite element model. In actual projects, the optimal diameter of pile should between 800-1 000 ram, and the elastic modulus of supporting course at the bottom of pile should not be less than 400 MPa.