桩—网复合地基承载及变形特性的三维数值分析

Pile-net Composite Foundation Under 3-D Condition

采用有限元程序,利用数值分析的方法,讨论了桩—网复合地基承载及变形特性。对不同荷载水平下复合地基中单桩荷载传递特性、桩间土的沉降、桩间土上的应力及桩土应力比的变化规律进行了分析;同时分析了复合褥垫层的变形模量以及分层地基中第一层土的物性参数对桩土应力比和复合地基中土表面沉降及差异沉降的影响。

Based on the software of finite element method （ANSYS 6.1） , this paper discusses the performances and deformation characteristics of pile-net composite foundation by numerical analysis. The bearing loading transfer in composite foundation and the settlement and variation of stress of soil and stress ratio of pile-soil law are analyzed under different loading conditions. Meanwhile, it analyzes the influences of elastic modulus of the composite cushions and the physical parameters of the first layer among layered soils of ground on the stress ratio of pile-soil and the settlement and different settlement on soil surface.