摘要
针对岩溶软土地区软基处理难题,文章以广西荔浦连线高速公路工程为依托,系统研究了布袋桩复合地基施工工艺及其对周边环境的影响机理。通过理论分析与现场监测相结合,明确了布袋桩的加固原理:土工布袋与水泥浆协同作用形成复合加固体,通过渗浆降低桩周软土含水量、增强桩体加筋效应,并利用中间硬土层承载力,显著提升复合地基性能。研究提出了1套完整的施工技术体系,包括多段式钻进成孔、无泥浆循环清孔、高精度浆液配置及返浆循环处理等关键工艺。监测数据表明,施工过程中周边地表位移及土体压力变化均控制在规范允许范围内,验证了技术的安全性与可靠性。研究成果为岩溶软土区软基处理提供了理论依据和实践参考,具有显著的经济效益与工程推广价值。
Aiming at the problem of soft foundation treatment in karst soft soil areas,this paper relying on the Lipu Expressway Project in Guangxi,systematically studies the construction technology of bag-type pile composite foundation and its influence mechanism on the surrounding environment.Through the combination of theoretical analysis and on-site monitoring,the reinforcement principle of bag piles has been clarified:geotextile bags and cement slurry work together to form a composite solid,reducing the water content of the soft soil around the pile through slurry infiltration,enhancing the reinforcement effect of the pile body,and significantly improving the performance of the composite foundation by utilizing the bearing capacity of the intermediate hard soil layer.The research has proposed a complete set of construction technology systems,including key processes such as multi-stage drilling and hole formation,mud-free circulation hole cleaning,high-precision slurry preparation and return slurry circulation treatment.Monitoring data indicates that the surface displacement and soil pressure changes around the construction process were all controlled within the allowable range of the specifications,verifying the safety and reliability of the technology.The research results provide theoretical basis and practical reference for the treatment of soft foundations in karst soft soil areas,and have significant economic benefits and engineering promotion value.
作者
白生利
王喜辉
陈晨
BAI Sheng-li;WANG Xi-hui;CHEN Chen(China Communications First Highway Engineering Bureau 9th Engineering Co.,Ltd.,Guangzhou 511300,Guangdong China)
出处
《建筑机械》
2026年第2期109-114,共6页
Construction Machinery
关键词
岩溶软土区
布袋桩
复合地基
渗浆机理
施工监测
karst soft soil area
bag pile
composite foundation
seepage mechanism
construction monitoring
