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为解决饱和地基土承受大面积堆载作用时,会由于固结作用而逐渐沉降的问题.置于这种地基中的桩基础,受土的固结沉降作用会产生负摩擦力从而引起下拉载荷和轴向拉力.从桩-土作用机理出发,基于Terzaghi一维固结理论和单桩弹性微分方程,建立了横观各向同性地基在堆载作用下桩土相互作用关系表达式,并给出了其解析解和有限差分求解方法.理论计算结果与工程实测结果的比较分析表明:该方法能够反映堆载作用下单桩受力的主要特点,从而为工程实践提供了一个新的思路.
In order to solve the problem of gradual settlement due to the consolidation effect when the saturated foundation soil is subjected to large-scale stowage, the pile foundation placed in such foundation will be subjected to the negative friction force caused by the consolidation and settlement of the soil to cause the pull-down load And axial tensile force of pile foundation.According to the one-dimensional consolidation theory of Terzaghi and the elastic differential equation of single pile, based on the pile-soil interaction mechanism, the expression of pile-soil interaction under transverse loading is established, The analytical solution and the finite difference method are given out.The comparison and analysis of the theoretical calculation results and the measured ones shows that the method can reflect the main characteristics of the pile subjected to the pile loading and provide a new idea for engineering practice.