路基工程Issue(4)：77-82,6.DOI:10.13379/j.issn.1003-8825.202305049
砂性土中桩板结构地基承载特性试验研究
Test Study on Bearing Characteristics of Pile-Plank Foundation in Sandy Soil
摘要
Abstract
In order to optimize the design of pile-plank structure,laboratory model test was carried out on pile-plank foundation in sandy soil.The test analyzed the load-subsidence relation of pileless foundation and pile-plank foundation under the action of vertical load,and studied the effect of pile spacing,pile length and pile diameter on the ultimate bearing capacity of foundation soil and the bearing ratio(BCR).The results show that,compared with pileless foundation,pile-plank structure may increases the bearing capacity of foundation significantly and decreases the subsidence of foundation;the pile length has relatively small effect;the pile diameter has such largest effect on ultimate bearing capacity that,when the pile diameter increases from 15 mm to 35 mm,the bearing capacity of foundation increases by 117％on the working condition of the same settlement of 20 mm;the increase of the ratio of pile spacing to pile diameter reduces the slope of load-subsidence relation curve at the stage of slow deformation,defers the load level at the time of shear failure of soil mass,and decreases the settlement deformation corresponded to the ultimate bearing capacity;when the pile spacing is 4 times of the pile diameter,the pile-plank-soil coupling effect may be given full play,and leads to maximum bearing capacity of foundation.关键词
地基基础/桩板结构地基/承载特性/模型试验/桩间距Key words
foundation/pile-plank foundation/bearing characteristics/model test/pile spacing分类
建筑与水利引用本文复制引用
黄晓东,王琦,李彩霞..砂性土中桩板结构地基承载特性试验研究[J].路基工程,2024,(4):77-82,6.基金项目
陕西省交通运输厅2022年度交通科研项目:装配化无土桩板路基施工与应用技术研究(22-46K) （22-46K）
