土木与环境工程学报（中英文）2025，Vol.47Issue(3)：91-101,11.DOI:10.11835/j.issn.2096-6717.2024.008
水平荷载作用下能量桩群桩的变形特性
Deformation characteristics of energy pile group under horizontal loading
摘要
Abstract
Current research on the thermodynamic characteristics of the energy pile group foundation under external load mainly focuses on the vertical load,however the study on impact of horizontal load is limited.To investigate the deformation characteristics of horizontally loaded energy pile groups under asymmetric heating or cooling conditions,a single pile within the 2×2 energy pile group was heated and cooled through the model tests,and a three-dimensional finite element model of the energy pile group was established.The measured data and numerical results were compared and validated,and parametric analysis was conducted to study the thermo-mechanical response of the pile during the operation of a single pile for the energy pile group.Results indicate that the findings of numerical model and model tests are generally consistent.The bending moment was mainly concentrated in the upper part of the pile,its peak bending moment and inflection point are located 0.23L1 and 0.8L1 below the soil surface,and the horizontal displacement of the pile also decreased with the increasing depth(L1 is the effective buried depth of pile).The horizontal loading had a greater impact on the deformation characteristics of the pile,but the influence of temperature could not be ignored.As the temperature increased or decreased,the bending moment and displacement of the energy pile tended to increase.Compared with the only subjected to horizontal load,the increase in water temperature by 10℃and 20℃led to an increase in the Mmax(peak bending moment)of the energy pile by about 23.36%and 25.46%,and an increase in the horizontal displacement of the pile top by about 20.59%and 21.93%when the horizontal load and temperature variation were applied simultaneously.The decrease in water temperature by 10℃and 20℃resulted in an increase of approximately 23.48%and 24.39%in the energy pile Mmax(peak bending moment),and an increase of approximately 17.97%and 21.27%in the horizontal displacement of the pile top.关键词
能量桩/群桩/砂土/变形特性/数值模拟/模型试验Key words
energy pile/pile groups/sand/deformation characteristics/numerical simulation/model tests分类
土木建筑引用本文复制引用
吴琪,丁选明,王成龙,张鼎新..水平荷载作用下能量桩群桩的变形特性[J].土木与环境工程学报（中英文）,2025,47(3):91-101,11.基金项目
国家自然科学基金(52278396) （52278396）
中国博士后科学基金(2023T160766) （2023T160766）
重庆市博士后研究项目(2022CQBSHTB3006) National Natural Science Foundation of China(No.52278396) （2022CQBSHTB3006）
China Postdoctoral Science Foundation,Special Fund(No.2023T160766) （No.2023T160766）
Special Foundation of Postdoctoral Support Program,Chongqing(No.2022CQBSHTB3006) （No.2022CQBSHTB3006）
