杨  敏    张俊峰
    （同济大学地下建筑与工程系  上海 200092）

[提要]  基于筏-桩-土相互作用理论的计算分析，给出了软土地区的桩基沉降计算实用方法和公式，包括桩筏基础的平均沉降、差异沉降和基础板纵向整体弯矩，减少沉降桩基础的沉降以及柔性桩（如水泥土搅拌桩）基础的沉降公式，大大简化了桩基沉降的计算，并可得到较合理的计算结果。
[关键词]  桩基础 沉降 差异沉降 基础弯矩

An approach and practical formulas of the settlement of pile foundation in soft clay are presented based on the interaction analysis of pile-raft-soil system by using the method of the boundary integration for piles embedded in elastic half space. The total settlement, differential settlement and moment of pile raft foundation and the settlement of reducing-settlement pile foundation of a number of buildings in Shanghai are calculated as the examples of the application and show a good feasibility and easiness of the utilization.
Keywords: pile foundation; settlement; soft  caly