一种单侧堆载作用下桩基侧向位移计算方法  

Calculation Method of Lateral Displacement of Pile Under Single-side Surcharge Load

作　　者：杨吉新[1] 王金川 陈天驰 林树锋 黄小刚 孙进 YANG Jixin;WANG Jinchuan;CHEN Tianchi;LIN Shufeng;HUANG Xiaogang;SUN Jin(School of Transportation and Logistics Engineering,Wuhan University of Technology,Wuhan 430063,China;Ccccshec Chengdu Urban Construction Engineering Co.Ltd.,Chengdu 610000,China)

机构地区：[1]武汉理工大学交通与物流工程学院,武汉430063 [2]中交二航局成都城市建设工程有限公司,成都610000

出　　处：《武汉理工大学学报（交通科学与工程版）》2023年第3期556-560,567,共6页Journal of Wuhan University of Technology（Transportation Science & Engineering）

摘　　要：基于Flamant解推导了梯形荷载作用下桩侧附加土压力计算式,引入Pasternak双参数地基模型构建了桩身挠曲微分方程.采用有限差分法求解该方程,可得到桩身侧向位移.以两个项目为背景,对比各方法计算所得结果.结果表明:算例一中各方法所得侧向位移值随着深度增加均呈现出先增大后减小的趋势,最大值出现在桩身1/5~1/3范围内;算例二中计算值与实测值在桩顶处相差6.4 mm,误差约为6%.Based on Flamant solution,the formula of additional soil pressure gauge on the pile side under trapezoidal load was derived,and the differential equation of pile deflection was constructed by introducing Pasternak two-parameter foundation model.The lateral displacement of the pile can be obtained by solving the equation with finite difference method.Taking two projects as the background,the results calculated by each method were compared.The results show that the lateral displacement values obtained by each method in Example 1 show a trend of increasing first and then decreasing with the increase of depth,and the maximum value appears in the range of 1/5~1/3 of the pile body.The difference between the calculated value and the measured value in the second example is 6.4 mm at the top of the pile,and the error is about 6%.

关 键 词：侧向位移 单侧堆载 被动桩 桥梁工程 有限差分法 

分 类 号：U443.15[建筑科学—桥梁与隧道工程]