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The settlement behavior of piled raft in clay soils

机译：桩筏在黏土中的沉降行为

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摘要

The settlement behavior of a square piled raft in clay soil was investigated using numerical analysis. The emphasis was on quantifying the reduction of the average and differential settlements in soft and stiff clay soils. To obtain the detailed information on the piled raft, a nonlinear three-dimensional finite element analysis with pile-soil slip interface model was performed for various pile positions, pile numbers, pile lengths under the raft and different loading types. Based on the results obtained, the settlement aspects for an efficient design of piled rafts subjected to vertical loading are discussed for soft and stiff clay soils. It is found that the variation of reduction ratio (S_(PR.acg)/S_(UR.avg)) of soft clay was relatively greater than that of stiff clay, whereas the reduction ratio of soft clay was relatively smaller than that of stiff clays. It is also found that the required pile group-raft area ratio (A_g/A_r) for minimizing differential settlement in soft clay was slightly larger than that of stiff clay in the same pile array.
机译：利用数值分析方法研究了方形桩筏在黏土中的沉降行为。重点是量化软硬土质中平均沉降量和差异沉降量的减少量。为了获得有关桩筏的详细信息，利用桩-土滑移界面模型对桩的各种桩位，桩号，桩长和不同载荷类型进行了非线性三维有限元分析。基于获得的结果，讨论了软和硬粘土在竖向荷载下有效设计桩筏的沉降方面。发现软黏土的还原率（S_（PR.acg）/ S_（UR.avg））的变化相对大于硬质黏土的变化率，而软黏土的还原率小于硬质黏土的减小率。黏土。还发现，在相同的桩组中，使软土中的差异沉降最小化所需的桩群-筏子面积比（A_g / A_r）略大于硬土。

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