干拌水泥碎石桩路基沉降处治效果及影响因素  

Effect and influencing factors of subgrade settlement treatment by cement gravel mixing trenchless piles

作　　者：廉文婷 张永成 罗诗耀 冯升正 陈斌 LIAN Wenting;ZHANG Yongcheng;LUO Shiyao;FENG Shengzheng;CHEN Bin(Gansu Communication Investment Management Co.,Ltd.,Lanzhou 730030;Gansu Provincial Communications Planning Survey and Design Institute Co.,Ltd.,Lanzhou 730030;Gansu Changlong Highway Maintenance Technology Institute Co.,Ltd.,Lanzhou 730030;Gansu Highway Maintenance Technology Innovation Center,Lanzhou 730030)

机构地区：[1]甘肃省交通投资管理有限公司,甘肃兰州730030 [2]甘肃省交通规划勘察设计院股份有限公司,甘肃兰州730030 [3]甘肃畅陇公路养护技术研究院有限公司,甘肃兰州730030 [4]甘肃省公路养护技术创新中心,甘肃兰州730030

出　　处：《中国建材科技》2024年第4期91-94,59,共5页China Building Materials Science & Technology

基　　金：甘肃省交通运输厅科技项目(2023-32)。

摘　　要：为缓解黄土地区路基沉降问题,结合实际工程,对沉降路段采用干拌水泥碎石桩进行处治,并选取典型断面进行跟踪监测,对处治效果进行分析。此外,利用有限元模型分析不同桩土参数下的路基沉降行为。结果表明,采用干拌水泥碎石桩技术处治路基沉降取得了较好效果,经2年服役,处治路段累积沉降量为15.4mm。路基沉降量随着长径比的减小逐渐减小,随着桩身模量的增加逐渐减小,随着桩间距的增加逐渐增大,其中,桩身模量对沉降量影响幅度最小,长径比次之,桩间距的影响幅度最大。To alleviate the problem of subgrade settlement in loess area,combined with practical projects,cement gravel mixing trenchless piles are used to treat the settlement sections,and typical sections are selected for tracking and monitoring to analyze the treatment effect.In addition,finite element model is used to analyze the settlement behavior of subgrade under different pile-soil parameters.The results show that cement gravel mixing trenchless pile technology has achieved good results in the treatment of subgrade settlement.After two years of service,the cumulative settlement of the treated section is 15.4mm.The settlement of subgrade decreases with the decrease of length-diameter ratio,decreases with the increase of pile modulus,and increases with the increase of pile spacing.Among them,the influence of pile modulus on settlement is the smallest,followed by length-diameter ratio,and the influence of pile spacing is the largest.

关 键 词：路基沉降 干拌水泥碎石桩 跟踪监测 数值分析 

分 类 号：U416[交通运输工程—道路与铁道工程]