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疏桩基础是近年来开始的对桩基设计理论的新探索。它以控制建筑物的沉降量和补偿天然地基承载力不足来确定桩的补偿量,因此它的变形性状有别于传统的桩基。选用了能描述土体塑性特点的弹塑性本构模型,利用研制的并经过算例验证的三维有限元程序对疏桩基础的变形性状进行了分析,得出了疏桩基础的整体沉降、桩间土体的压缩、桩端下土体的压缩等的变化规律。
Sparse pile foundation is a new exploration of pile foundation design theory started in recent years. It is to control the settlement of the building and compensate for the lack of bearing capacity of the natural foundation to determine the compensation of the pile, so its deformation characteristics are different from the traditional pile foundation. The elasto-plastic constitutive model that can describe the plasticity of soil is chosen. The deformation characteristics of the pile foundation are analyzed by the developed and verified three-dimensional finite element program. The integral settlement of pile foundation, Between soil compression, soil compression under the pile end changes.