一种管桩植桩新型注浆工法探析  

Analysis of A New Grouting Method for Pipe Implanted Pile

作　　者：徐建华 朱斌[2] 杨东源 卢炳轩 徐乐天 Xu Jianhua;Zhu Bin;Yang Dongyuan;Lu Bingxuan;Xu Letian(CUCDE Environmental Technology Co.,Ltd.,Beijing 100120,China;Guilin University of Technology,Guilin 541004,Guangxi,China;Department of Housing and Urban-Rural Development of Guangxi Zhuang Autonomous Region,Nanning 530023,Guangxi,China;Guangxi Gaoyuan Construction Technology Co.,Ltd.,Nanning 530025,Guangxi,China)

机构地区：[1]中城院(北京)环境科技有限公司,北京100120 [2]桂林理工大学,广西桂林541004 [3]广西壮族自治区住房和城乡建设厅,广西南宁530023 [4]广西高远建筑科技股份有限公司,广西南宁530025

出　　处：《岩土工程技术》2021年第6期395-399,共5页Geotechnical Engineering Technique

摘　　要：借助管桩植桩后注浆成桩、成柱在某工程解决“桩柱一体工程”的案例,分析目前各种桩基础施工的利弊,提出一种管桩植桩新型注浆工法,并分析其优势和实际操作的可行性。运用流体力学基本原理,论证这种新型注浆工法的合理性及可行性,并借此阐述该工法的运行机理、施工工艺。该工法借助管桩自有的特性及旋挖机等钻孔机械的优势,解决了管桩在硬质岩层(特别是岩溶发育地区)场地桩基础施工中遇到的难题,如成孔难、混凝土砂浆充溢系数大等问题。同时,该工法简化了管桩植入桩工法中复压或锤击的工序,也拓展大管桩(管径1.30 m以上)在植入桩中的使用范围,使桩机植入管桩简单、经济、实用和环保,为今后管桩在硬质岩,特别是在岩溶地区的推广、普及运用奠定了基础。Advantages and disadvantages of various pile foundation construction are analyzed,and the advantages and feasibility of a new grouting method for pipe implanted pile are proposed based on the successful case of grouting into pile and column in a certain integrated pile and column project.Based on basic principles of fluid mechanics,the rationality and feasibility of the new grouting method are demonstrated,and the operation mechanism and construction technology of the new grouting method are expounded.By virtue of the characteristics of pipe pile and the advantages of drilling machinery such as rotary excavator,this method can solve the problems of pipe pile foundation construction in hard rock stratum(especially in karst area),such as the difficulty in drilling holes and the large filling coefficient of concrete mortar.This method simplifies the pressed or hammer process in the pipe implanted pile method,and also enlarges the application scope of big pipe pile(over 1.30 m in diameter)in implanted pile.The implanted pipe pile is simple,economic,practical and environmental,and could provide basis for the popularization and application of pipe pile in hard rock,especially in karst areas in the future.

关 键 词：管桩 植桩 注浆 桩基础 混凝土 

分 类 号：TU473.1[建筑科学—结构工程]