岩土工程学报2024，Vol.46Issue(z2)：97-102,6.DOI:10.11779/CJGE2024S20009
基于承载特性的挤扩支盘桩加固深厚软基作用机理研究
Mechanism of reinforcement of squeezed branch piles for deep soft foundation based on load bearing capacities
摘要
Abstract
To address the layout of squeezed branch(SB)piles in deep soft soil,a 3D numerical model is established based on the single pile static load tests on the SB pile application project in Shantou soft soil area.The load sharing characteristics and the branch-soil interaction mechanism are investigated during the settlement development.The results show that the load sharing ratio at the pile tip of the SB piles that do not penetrate through deep soft foundation is 19.6%,significantly lower than that of straight piles.The group efficiency ηg of the SB piles is correlated to the number of piles N and pile spacing Sp,with an optimal spacing of 8d recommended for the SB piles in deep soft soil regions.The tip of branch,particularly the lower branch,can transfer a considerable load to the surrounding soil under the ultimate settlement conditions.The inter-branch spacing Sb affects the load bearing of piles by altering the properties of soil stratum of branches.关键词
挤扩支盘桩/承载特性/数值模拟/荷载传递/软土地基处理Key words
squeezed branch pile/bearing characteristic/numerical simulation/load transfer/treatment of soft foundation分类
建筑与水利引用本文复制引用
张坤标,汪益敏,陈页开,丘燊,易浩,曾昭宇..基于承载特性的挤扩支盘桩加固深厚软基作用机理研究[J].岩土工程学报,2024,46(z2):97-102,6.基金项目
2021年度交通运输行业重点科技项目(2021-MS1-022) （2021-MS1-022）
