交通荷载下桩网复合地基承载变形特性模型试验  

Model Test of Axial Capacity and Deformation of Pile-Net Composite Foundation Under Traffic Load

作　　者：蔡永浩 薛凯仁 刘开富[1] CAI Yonghao;XUE Kairen;LIU Kaifu(School of Civil Engineering and Architecture,Zhejiang Science and Technology University,Hangzhou 310018)

机构地区：[1]浙江理工大学建筑工程学院,杭州310018

出　　处：《土工基础》2025年第1期154-158,共5页Soil Engineering and Foundation

摘　　要：为研究循环荷载下桩网复合地基的承载变形特性,开展了循环荷载下桩网复合地基的模型试验,分析了不同循环加载频率下桩网复合地基的归一化累积沉降、桩身应变及桩土荷载分担比。研究结果表明,随着循环次数的增加,桩网复合地基的归一化累积沉降、桩身应变和桩的荷载分担比随之增加,桩网复合地基的归一化累积沉降和桩身应变主要集中在前期,且随着循环次数的增加,增加速率减少;随着循环荷载频率的增加,桩网复合地基的归一化累积沉降、桩身应变随之增加,桩间土的荷载向桩体转移。研究成果可为交通荷载下桩网复合地基的设计施工及运营提供参考。To study the axial deformation characteristics of pile-net composite foundation under the traffic load,a model tests of the pile-net composite foundation were performed under the cyclic loading.The influence of the load frequency on the normal-ized cumulative settlement of the pile-net composite foundation,pile strain and pile-soil load sharing ratio are analyzed.The re-sults show that the normalized cumulative settlement,the pile strain and the pile load sharing ratio of the pile-net composite foundation increased with the increase of the number of cyclic cycles.The normalized cumulative settlement and the pile strain of pile-net composite foundation is mainly concentrated in the early stage,and the increase slowly in the later period.With the increase of the load frequency,the normalized cumulative settlement and the pile strain of pile-net composite foundation in-creased,and the load transferred from soil between piles to the pile top.The research results can provide a basis for the design and construction of the pile-net composite foundation under the traffic load.

关 键 词：桩网复合地基 循环荷载 归一化累积沉降 桩身应变 桩土荷载分担比 

分 类 号：TU472[建筑科学—结构工程]