摘要
能量桩(又称能源桩)作为一种浅层地热能利用新技术,近年来得到了广泛的关注.基于COMSOL软件,结合桩顶荷载对能量桩群桩荷载传递机理的影响模型试验,开展了3×3能量桩群桩中1根~5根桩停止运行时最均匀与最不均匀布置情况的数值模拟计算.研究结果表明,当运行桩布置均匀时,其整体的承台变形情况也对称分布,随着运行桩数的减少,桩顶承台最大和最小沉降量随之减小,沉降差在0.048%D~0.072%D(D为桩径)之间;在多根桩停止运行的所有工况中,四根桩停止运行且均匀布置时,承台的沉降最均匀,沉降差最小(0.059%D);当不运行的桩数相同的情况下,不均匀布置下桩顶承台变形的沉降差始终大于均匀布置下的变形情况.
As an energy technology utilizing shallow geothermal energy,energy piles have received extensive attention in recent years.Based on the COMSOL software and relying on the model test of the influence of the load on the pile top on the load transfer mechanism of the energy pile group,the numerical simulation calculation of the most uniform and the most nonuniform layout of the working piles when 1 to 5 piles stopped running in 3×3 group was carried out.The results showed that when the running piles are uniformly arranged,the overall deformation of the cap was also symmetrically distributed.As the number of running piles decreases,the maximum and minimum settlements of the raft decrease,and the settlement difference was between 0.048%D~0.072%D.In all the working conditions when multiple piles stop running,the settlement of the raft was the most uniform and the settlement difference was the smallest when the four piles stopped running and were uniformly arranged,which was 0.059%D;When the number of non-operating piles was the same,the deformation difference of the raft under the non-uniform arrangement was always bigger than that under the uniform arrangement.
作者
晁军
CHAO Jun(China Railway 16th Bureau Group Co.Ltd.,Huzhou 313000,Zhejiang China)
出处
《河南科学》
2022年第6期956-963,共8页
Henan Science
基金
中国铁建十六局科研项目(2021016)。
关键词
能量桩
群桩
不均匀沉降
数值模拟
energy pile
pile group
nonuniform settlement
numerical simulation
