大面积堆载对临近桩基力学性能的影响  

Influence of large-area loading on mechanical properties of adjacent pile foundations

作　　者：方国华[1] 耿长春[1] 丁志全[1] FANG Guohua;GENG Changchun;DING Zhiquan(CCCC-FHDI Engineering Co.,Ltd.,Guangzhou 510290,China)

机构地区：[1]中交第四航务工程勘察设计院有限公司,广东广州510290

出　　处：《水运工程》2024年第8期288-294,共7页Port & Waterway Engineering

基　　金：国家重点研发计划项目(2023YFB2604200)。

摘　　要：码头堆场的地基通常较为软弱,当在堆场附近有重要的建(构)筑物时,为保证建筑物结构安全,须评估大面积堆载对临近基桩力学性能的影响,包含基桩位移和桩身内力,但现行规范对此未作规定。本文利用经典Boussinesq应力位移解为基础,推导出计算任意荷载作用下土体位移和应力的方法,自编相应的计算程序,并利用土体的位移和应力间接计算桩身的变形和内力。以某煤棚项目为例,采用上述方法计算煤堆荷载作用下桩顶位移和桩身内力,结果表明基桩的最大侧移满足规范要求,桩身轴力和弯矩较大,桩身强度验算需考虑上述荷载产生的桩身内力。采用本计算方法可以方便计算任何荷载下基桩的位移和内力,计算较准确,可为类似的项目提供参考。The foundation of the dock yard is usually relatively weak.When there are important buildings(structures)near the yard,in order to ensure the structural safety of the buildings,it is necessary to evaluate the effect of large-area loading on the mechanical properties of the adjacent foundation piles,mainly including the displacement of the foundation piles and the internal force of the pile body.However,the current regulations do not specify this.This article uses the classic Boussinesq stress displacement solution as the basis to derive a method for calculating the soil displacement and stress under arbitrary load,and develops corresponding calculation programs.The displacement and stress of soil are used to indirectly calculate the deformation and internal force of pile body.Taking a coal shed project as an example,the above method is used to calculate the displacement of the pile top and the internal force of the pile body under the coal pile loads.The results show that the maximum lateral displacement of the foundation pile met the requirements of the specifications,and the axial force and bending moment of the pile body are relatively large.The strength calculation of the pile body should consider the internal force of the pile body generated by the above loads.The use of this calculation method can conveniently calculate the displacement and internal force of foundation piles under any load,and the calculation is more accurate,which can provide reference for similar projects.

关 键 词：大面积堆载 BOUSSINESQ 桩位移 桩身内力 

分 类 号：U65[交通运输工程—港口、海岸及近海工程]