摘要
p-y曲线法分析简单、含义明确,在水平受荷桩非线性分析中应用广泛。目前的研究中多涉及砂土和黏土,对粉土p-y曲线研究相对较少。依托杭绍甬高速(杭州至绍兴段)工程,开展3cm和5cm两种直径的水平受荷桩室内模型试验研究。基于桩身的应变监测分析桩身内力及变形,推求p-y曲线,并与API砂土p-y曲线进行对比分析。结果表明,粉土中的黏聚力有助于提高极限承载力,其影响不可忽视;直径越大,p-y曲线初始刚度越大;通过数据拟合和理论分析得出的粉土p-y曲线模型与实测值吻合较好,可为类似研究提供借鉴。
The p-y curve method is simple and clear,which is widely used in nonlinear analysis of horizontal loaded piles.At present,most studies involve sand and clay,and the p-y curve of silt is rarely studied.Based on the Hangzhou–Ningbo Expressway(Hangzhou-Shaoxing Section)project,the model tests of horizontal loaded piles with diameters of 3cm and 5cm were carried out.Through the strain monitoring of the piles,the internal force and deformation of the piles were analyzed.The p-y curves of silt were deduced and compared with the API sand p-y curve.The results show that the cohesion component in silt contributes to improve the ultimate bearing capacity,and its influence cannot be ignored.The initial stiffness of p-y curve increases with the increment of the diameter of piles.The p-y curve model of silty soil obtained by data fitting and theoretical analysis is in good agreement with the measured values,which can provide reference for similar research.
作者
张牧
黄敬正
王洋
龚维明
戴国亮
ZHANG Mu;HUANG Jingzheng;WANG Yang;GONG Weiming;DAI Guoliang(Zhejiang Hangshaoyong Expressway Co.,Ltd.,Hangzhou 310000,China;Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education,Southeast University,Nanjing 211189,China;School of Civil Engineering,Southeast University,Nanjing 211189,China)
出处
《建筑结构》
CSCD
北大核心
2022年第S01期2456-2462,共7页
Building Structure
基金
国家自然科学基金项目(51878160,52078128,52008100)
江苏省六大人才高峰项目(XNY-047)
浙江省交通运输厅科技计划项目(2021048)
关键词
粉土
模型试验
水平桩
P-Y曲线
silt
model test
horizontal loaded pile
p-y curve
