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Load Transfer Analysis Of Rock-socketed Drilled Shafts By Coupled Soil Resistance

机译：土力耦合的嵌岩井筒荷载传递分析。

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摘要

The load distribution and deformation of rock-socketed drilled shafts subjected to axial loads are evaluated by a load transfer method. The emphasis is on quantifying the effect of coupled soil resistance in rock-socketed drilled shafts using 2D elasto-plastic finite element analysis. Slippage and shear-load transfer behavior at the pile-soil interface are investigated by using a user-subroutine interface model (FRIC). It is shown that the coupled soil resistance acts as pile-toe settlement as the shaft resistance is increased to its ultimate limit state. Based on the results obtained, the coupling effect is closely related to the ratio of the pile diameter to soil modulus (D/E_s) and the ratio of total shaft resistance against total applied load (R_s/Q). Through comparison with field case studies, the 2D numerical analysis reasonably estimated load transfer of pile and coupling effect, and thus represents a significant improvement in the prediction of load deflections of drilled shafts.
机译：用载荷传递方法评估嵌岩钻轴在轴向载荷下的载荷分布和变形。重点是使用2D弹塑性有限元分析来量化嵌岩钻孔井中耦合土阻力的影响。使用用户子程序界面模型（FRIC）研究了桩-土界面处的滑移和剪力传递行为。结果表明，当轴阻力增加到极限极限状态时，耦合的土壤阻力起到桩趾沉降的作用。根据获得的结果，耦合效果与桩直径与土壤模量的比（D / E_s）和总轴阻力与总施加载荷的比（R_s / Q）密切相关。通过与现场案例研究的比较，二维数值分析合理地估计了桩的载荷传递和耦合效应，从而代表了钻杆载荷挠度预测的显着改进。

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