竖向荷载作用下不同长度和直径桩的桩筏分析

阐述了用于分析不同长度和直径桩的桩筏模型的有限层方法,土体按照物质特性的不同分为多个水平层,只考虑竖向荷载对筏的影响.用该方法研究筏-土体-桩的相互作用,所得结果与实测结果接近,验证了该方法的可行性.

Behaviour of Piled Rafts with Piles of Different Lengths and Diameters under Vertical Loading

When the raft is subjected to non-uniform Ioadings, foundation lends to rotate and has a differential settlement. To prevent the foundation from rotating and to reduce the differential settlement efficiently and economically, piles of different diameters and lengths are laid under non-uniform loadings. A finite layer method used lot the analysis of piled rafts with piles of different lengths and diameters is presented. The soil is divided into horizontal layers with different material properties and only vertical loads may be applied to the raft. Interactions between raft-soil-pile are computed. Results are shown to agree closely with those from the engineering.