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首页> 外文期刊>The HKIE Transactions >Parametric studies on the lateral restraints of pile caps in soil
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Parametric studies on the lateral restraints of pile caps in soil

机译：桩帽在土壤中的侧向约束参数研究

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The general behaviours of pile caps with vertical rectangular faces embedded in soil mass idealised as a semi-infinite elastic continuum under lateral shears and on-plan torsions are discussed in this paper. Approaches based on the elastic continuum theory with consideration of the soil pressure limited to the passive pressure values have been formulated for the estimation of lateral displacements and on-plan rotations of the pile cap. Based on the findings, parametric studies are then conducted with the production of tables for users to estimate the lateral translational and torsional resistances of pile caps and subsequently, their displacements and rotations under lateral shears and/or on-plan torsions. These tables, though not exactly reflecting the true elasto-plastic behaviour, give conservative results which are also fairly accurate as compared with that yielded by the elasto-plastic theory. The tables can therefore serve as a quick check for users without going into more sophisticated analyses such as the tedious finite element analysis by computer software. As a demonstration of the use of the tables, the method for determination of the combined actions of the pile cap and the pile group under lateral loads is also included, with the illustration of a worked example. Finally, the applicability and limitations of the approach in real cases including underground obstructions and non-homogeneity of soil properties are discussed.
机译：本文讨论了在土体中嵌入垂直矩形面的桩帽在横向剪力和平面扭力作用下的理想行为，将其理想化为半无限弹性连续体。考虑到土压力限制在被动压力值的基础上，已经建立了基于弹性连续理论的方法，用于估算桩帽的横向位移和平面上的旋转。基于这些发现，然后进行参数研究，并生成表格供用户使用，以估算桩帽的侧向平移和扭转阻力，然后估算其在侧向剪力和/或平面扭转下的位移和旋转。这些表虽然不能完全反映真实的弹塑性行为，但给出的保守结果与弹塑性理论得出的结果相比也相当准确。因此，这些表可以用作用户的快速检查，而无需进行更复杂的分析，例如通过计算机软件进行的繁琐的有限元分析。为了说明这些表格的使用，还包括确定侧向荷载下桩帽和桩组组合作用的方法，并给出了一个实例。最后，讨论了该方法在实际情况下的适用性和局限性，包括地下障碍物和土壤特性的非均质性。

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