按沉降量控制的复合桩基设计方法(上)

• 作 者: 黄绍铭 王迪民 裴捷 贾宗元 魏汝楠 姚建明
• 机 构: 上海市民用建筑设计院,上海市民用建筑设计院,上海市民用建筑设计院,上海市民用建筑设计院,上海市民用建筑设计院,上海市民用建筑设计院
• 出 处: 工业建筑
• 发表日期: 1992年07期
• 关键词: 复合桩基 桩数 容许沉降量 承台 容许承载力 软土地基 沉降量控制 完整设计 单桩极限承载力 荷载

本文突破了由单桩容许承载力确定桩数和外荷载由桩单独承担的低承台摩擦桩基传统设计概念,提出了由容许沉降量确定桩数和外荷载由桩与承台共同承担即按沉降量控制的复合桩基的完整设计方法,介绍了以沉降量为控制指标时的设计原则和步骤。最后简要叙述了该方法在软土地基上多层和中高层建筑中应用的概况及其显著的技术经济效果。

This paper breaks through the traditional design concept of the low pile cap friction pile which is determined by the allowable bearing capacity of a single pile and the external load is borne by the pile alone. It is proposed that the pile number and the external load are determined by the allowable settlement quantity and shared by the pile and the cap. According to the complete design method of the composite pile foundation controlled by the settlement amount, the design principle and steps when the settlement amount is used as the control index are introduced. Finally, it briefly describes the application of the method in multi-storey and medium-high-rise buildings on soft ground and its significant technical and economic effects.