中文摘要：

为解决现有梁、板法不能同时考虑桩土差异刚度、布桩形式以及摩阻效应对土工格室加筋体变形影响的问题，将单桩影响范围内的土工格室视为受上部荷载、水平摩阻力及桩土支撑力共同作用下的弹性圆薄板，并基于Winkler假定考虑了土工格室与桩土加固区的变形协调；根据单元体静力平衡建立了考虑水平摩阻效应的格室体挠曲变形控制微分方程，利用Bessel复变函数构造出不同条件下的挠度解析表达式，在此基础上得到了双向增强复合地基网下桩土应力比、沉降及桩土差异沉降的计算公式；采用室内试验对该方法进行了验证，并在此基础上利用该方法探讨分析了格室加筋体的复合弹性模量、水平摩阻系数、桩土刚度比等因素对双向增强复合地基网下桩土应力比和沉降的影响。研究结果表明：与实测值的对比结果显示该方法具有可行性；摩阻效应对桩土差异沉降影响较大，且在桩土刚度较大或加筋体复合弹性模量较小时，摩阻效应对桩土应力比、沉降影响亦十分显著。

英文摘要：

As the existing methods for beams and plates did not take into account the influences of the stiffness difference of piles and soil, the arrangement of piles and the horizontal friction effect on the deformation of the geocell reinforcement, the geocell reinforcement in the effect area of single pile was assumed to be an elastic circular thin plate under the combined effect of the upper load, the horizontal friction and the pile-soil support force. In this calculation model, the deformation compatibility between the geocell and the pile-soil reinforced area was considered based on the assumption of Winkler. According to the force equilibrium of differentiation element, the governing differential equation of geocell flexure deformation was established, and the corresponding solution was constructed through introducing the Bessel complex-variable functions. Based on the expression of the deformation of the geocell reinforcement, the formulas of the pile-soil stress ratio below the net, the settlement and the differential settlement were derived. A model test was introduced to verify the method proposed in this paper and the influences of the composite elastic modulus of the geocell reinforcement, horizontal frictional coefficient, and the pile-soil stiffness ratio on the pile-soil stress ratio below the net and settlementwere explored respectively. The results show that the present method is proved to be feasible through comparison with measured values, the horizontal friction effect has a great impact on the pile-soil differential settlement, and under the conditions of small composite modulus or high pile-soil stiffness ratio, its impact on the pile-soil stress ratio and settlement is also obvious.