GEP废弃泥固化桩复合地基在软土地基整治中的应用  

Application of GEP waste slurry cemented pile composite foundation in soft soil foundation remediation

作　　者：王法飞 彭玮恒 王海剑 WANG Fafei;PENG Weiheng;WANG Haijian(China Mineral Resources Group Zhoushan Development Co.,Ltd.,Zhoushan 316000,China;Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering,Hohai University,Nanjing 210098,China)

机构地区：[1]中国矿产资源集团舟山发展有限公司,浙江舟山316000 [2]河海大学岩土力学与堤坝工程教育部重点实验室,江苏南京210098

出　　处：《四川建材》2025年第1期84-89,共6页Sichuan Building Materials

摘　　要：软土地基加固一直是工程施工的关键需求,针对传统水泥土搅拌桩的承载力不足、质量不均匀等问题提出一种新型的筋箍预应力(GEP)废弃泥固化桩技术,将流态废弃泥浆进行固化处理,并注入地下形成GEP废弃泥固化桩,旨在解决软土地基整治难题并提升桩身质量,提高软土地基的承载力与稳定性。通过室内试验,确定了GEP桩的设计方案和施工工艺,并通过COMSOL软件对复合地基进行数值模拟,结合现场工程试验,评估其承载力及沉降特性。结果表明,GEP废弃泥固化桩在不同荷载下均展现出优于传统水泥土桩的承载力和沉降控制能力,最大沉降减少了16.87%。此外,GEP技术通过土工格栅的周向约束,显著提高桩体的刚度和承载力。研究结果表明,GEP废弃泥固化桩技术具有良好的应用前景,为软土地基加固和废弃泥资源化利用提供了有效的解决方案。Soft soil foundation reinforcement has always been a key requirement in engineering construction.At the same time,in response to the problems of insufficient bearing capacity and uneven quality of traditional cement soil mixing piles,this study proposes a new type of reinforcement prestressed(GEP)waste slurry cemented pile technology,which solidifies the flowing waste slurry and injects it into the ground to form GEP waste slurry cemented piles.The aim is to solve the problem of soft soil foundation remediation,improve the quality of the pile body,and enhance the bearing capacity and stability of the soft soil foundation.Through indoor and on-site engineering tests,the design scheme of GEP piles was studied and determined,and numerical simulations of the composite foundation were conducted using COMSOL software to evaluate its bearing capacity and settlement characteristics.The results showed that GEP waste solidified piles exhibited better bearing capacity and settlement control ability than traditional cement soil piles under different loads,with a maximum settlement reduction of 16.87%.In addition,GEP technology significantly improves the stiffness and bearing capacity of piles through the circumferential constraint of geogrids.The research results indicate that GEP waste slurry cemented pile technology has good application prospects and provides effective solutions for soft soil foundation reinforcement and waste slurry resource utilization.

关 键 词：软土地基 废弃泥固化桩 沉降控制 地基承载力 数值模拟 土工格栅 

分 类 号：TU472[建筑科学—结构工程]