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地基土承受大面积堆载作用时 ,就会产生沉降 ,置于这种地基中的桩基础 ,在土体沉降的作用下 ,桩侧就会产生负摩擦力。本文从桩 土相互作用的机理出发 ,建立了非均质地基土中单桩弹性微分方程 ,利用太沙基一维固结理论和土层分层总和法求得堆载作用下 ,土层沉降随深度和时间变化的规律。由此求得均质地基土中 ,单桩的弹性微分方程的解析解 ,用有限差分法研究了非均质地基土中的情况 ,并用此法分析了某一工程实例。
Subgrade soil to withstand large-scale stowage, it will have a settlement, placed in the foundation of the pile foundation, the settlement in the soil, the pile side will have negative friction. In this paper, based on the mechanism of pile-soil interaction, the elastic differential equation of single pile in heterogeneous soil is established. The soil subsidence is obtained by one-dimensional consolidation theory of With the depth and time of the law. In this way, the analytic solution of the elastic differential equation of the single pile in the homogeneous soil is obtained, and the finite difference method is used to study the situation in the heterogeneous foundation soil. An example of the project is analyzed by this method.