基于桩土接触作用的复合地基沉降变形数值研究

以桩土复合地基为研究对象,将桩、土、垫层、承台视为一个相互作用的复合地基体系,通过考虑桩土界面接触摩擦作用、土体的非线性特性及系统各个部分的主要作用及其相互影响,采用三维有限元数值分析对复合地基承载变形特性进行系统地分析,模拟桩土界面接触作用,研究分析复合地基沉降变形的组成及影响复合地基变形的因素,得出了一些有益的结论,为复合地基的理论分析及工程设计提供理论依据和借鉴。

Numerical Analysis on Settlement of Composite Foundation Based on the Contacting Characteristic of Pile-soil Interface

The characteristic of composite foundation bearing-deforming was studied systematically by 3D-FEM. The pile, soil, cushion and pile cap were considered as an interacting foundation system. On the consideration of friction between the soil and the piles, nonlinear character of soil, main effect of each part in the system and their interrelationship, the deformation composing and factors effected composite foundation deformation were analyzed. Some favorable results were obtained which can be very helpful to theoretical analysis of composite foundation and engineering design.