静载作用下黄土地基微型桩基础承载性能试验研究  

Experimental Study on Bearing Capacity of Loess Micropile Foundation Under Static Load

作　　者：何浪 HE Lang(Tianshui Geological Engineering Survey Institute of Building Materials Co.,Ltd.)

机构地区：[1]建材天水地质工程勘察院有限公司

出　　处：《广东建材》2025年第3期93-96,共4页Guangdong Building Materials

摘　　要：为了研究静载作用下黄土地基微型桩基础的承载特性,文中主要分析上拔荷载和下压荷载作用下微型桩基础轴力及侧向摩阻力的变形规律。结果表明,随着浸水时间的增加,浸水量先近似直线增长后稳定,线性段的增长速率为0.45m3/h;浸水深度先增加后稳定,增加阶段的速度达到3.15cm/h。当上拔荷载从20kN增加至240kN时,桩顶部的轴力增加幅度达到了337.5%;最大桩身侧摩阻力的增加幅度分别为162.5%、23.8%、34.6%。当下压荷载从50kN增加至350kN时,桩顶部的轴力增幅达到了630%;最大桩身的侧摩阻力增幅分别为200%、93.3%、52.1%。In order to study the bearing characteristics of micropile foundation on loess soil under static load,the deformation laws of axial force and lateral friction resistance of micropile foundation under uplift load and compression load are mainly analyzed in this paper.The results show that,with the increase of immersion time,the amount of water immersed first increases approximately linearly and then stabilizes,and the growth rate of the linear segment is 0.45m3/h.The immersion depth increased first and then stabilized,and the speed reached 3.15cm/h in the increasing stage.When the lifting load increases from 20kN to 240kN,the axial force on the top of the pile increases 337.5%.The maximum lateral friction resistance of pile body increased by 162.5%,23.8%and 34.6%,respectively.When the current pressure load increases from 50kN to 350kN,the axial force on top of pile increases by 630%.The maximum lateral friction resistance of pile body increases by 200%,93.3%and 52.1%,respectively.

关 键 词：黄土湿陷性 微型桩 上拔荷载 下压荷载 承载特性 

分 类 号：TU4[建筑科学—土工工程]