预制桩倾斜偏位对承载力的影响分析与对策  

Bearing capacity analysis and countermeasures of inclination and deviation of precast piles

作　　者：王辉 徐自国 任晓丹[3] Wang Hui;Xu Ziguo;Ren Xiaodan(Guangzhou Residential architecture Design Institute Co.Ltd,Shanghai 201103,China;RBS Architectural Engineering Design Associates Beijing Branch,Beijing 100055,China;College of Civil Engineering,Tongji University,Shanghai 2Q0Q92,China)

机构地区：[1]广州市住宅建筑设计院有限公司,上海201103 [2]广州容柏生建筑结构设计事务所北京分所,北京100055 [3]同济大学土木工程学院,上海200092

出　　处：《建筑科学》2021年第9期166-172,共7页Building Science

摘　　要：实际工程中预制桩经常由于打桩、土方开挖等原因引起桩基偏位与倾斜,并在桩身产生附加弯矩和剪力,给桩基安全带来一定隐患。本文基于弹性地基梁挠曲理论,推导了桩身竖向力与桩身内力的相关关系。提出了控制倾斜桩竖向承载力的6个极限状态,以某实际工程为例利用岩土数值分析软件,分析了倾斜率对桩竖向承载力的影响,确定了倾斜桩的竖向承载力,并提供了桩倾斜偏位的工程处理方案。The inclination and deviation of precast piles are often caused by pile driving,excavation or other reasons.The deviation and inclination of piles will generate additional bending moment and shear force on piles,and bring some influences to the safety of piles foundation.In this paper the correlation between vertical force and internal force of pile is deduced based on the flexural theory of beam on elastic foundation.The six limit states of controlling the vertical bearing capacity of inclined piles are suggested,by example of a practical project,the vertical bearing capacity of inclined pile by numerical method is discussed,and the engineering solutions of inclined piles are provided.

关 键 词：倾斜桩 竖向承载力 偏位桩 

分 类 号：TU473.13[建筑科学—结构工程]