摘要
为了分析了竖向荷载、桩数等因素对筏板水平位移、桩身弯矩和剪力分布的影响规律,进行了桩筏复合地基水平承载性能的室内模型试验。研究结果表明:筏板水平位移随着桩数或竖向荷载的增加而减小,筏板水平位移可通过增加桩数与竖向荷载得到限制;模型桩的桩顶处剪力值最大,桩身弯矩峰值点在桩身中部位置;当筏板受竖向荷载减小时,桩体受筏板传递的水平力也相应地减小,桩身弯矩及剪力也得到了降低。因此,调整复合地基的桩数和筏板的竖向荷载可控制桩身弯矩及剪力。
To provide reference for design and construction of piled raft composite foundation,laboratory test study of horizontal bearing characteristics of piled raft composite foundation was carried out.The influences of vertical load and pile number on the horizontal displacement of raft,pile bending moment and shear force were analyzed.Results show that the horizontal displacement of raft decreased with the pile number and vertical load.The horizontal displacement of raft can be effectively limited by increasing pile number and vertical load.The maximum bending moment of pile shaft appears in the middle of pile shaft(0.5 times the pile length).The maximum shear of pile shaft appears at the top of pile.The horizontal force of the pile transferred from raft can be significantly reduced by decreasing vertical load.Then the pile bending moment and shear force decrease.Therefore,the bending moment and shear force could be reduced by the adjustment of pile number and vertical load in the design and engineering application of the DPR.
作者
陈懿
程建华
朱小军
CHEN Yi;CHENG Jian-hua;ZHU Xiao-jun(Jiangsu Surveying and Design Institute of Water Resources Co.,Ltd.,Yangzhou 225127,China;School of Civil Science and Engineering,Yangzhou University,Yangzhou 225000,China)
出处
《桂林理工大学学报》
CAS
北大核心
2020年第4期742-746,共5页
Journal of Guilin University of Technology
基金
江苏省水利科技项目(2017017)
江苏省自然科学基金项目(BK20170509)。
关键词
桥梁工程
桩筏基础
复合地基
模型试验
水平特性
bridge engineering
piled raft foundation
composite foundation
model test
horizontal characteristic
