深基坑支护用大直径预应力混凝土管桩抗弯性能试验及应用研究  

Experimental and Applied Research on the Bending Performance of Large Diameter Prestressed Concrete Pipe Piles for Deep Foundation Pit Support

作　　者：戚玉亮 陈帅光 黄柯柯 QI Yu-liang;CHEN Shuai-guang;HUANG Ke-ke(Guangzhou Construction Industry Development Co.,Ltd.,Guangzhou 510663;Guangzhou Construction Co.,Ltd.,Guangzhou 510030;Guangzhou Research Institute of Construction Industry Co.,Ltd.,Guangzhou 510663)

机构地区：[1]广州建筑产业开发有限公司,广州510663 [2]广州建筑股份有限公司,广州510030 [3]广州建筑产业研究院有限公司,广州510663

出　　处：《广州建筑》2024年第1期35-38,共4页GUANGZHOU ARCHITECTURE

基　　金：广东省住房和城乡建设厅科技创新计划项目(2022-K35-033531);广州市建筑集团有限公司科技计划项目(2022-KJ014、2020-KJ017)

摘　　要：通过优化非预应力和预应力钢筋的布置,提高桩身混凝土强度等级,改进端板材质、构造等措施,研发出了更高抗弯性能的大直径混合配筋预应力混凝土管桩,适用于对管桩抗弯、抗剪性能要求更高的深基坑工程。而锤击、静压等常规预应力管桩施工工艺在遇到深厚软土层、不均匀风化岩层时容易出现管桩断桩、偏移、噪音大等问题。本文通过工程实践,采用无泥浆护壁、低噪音的大直径随钻跟管桩施工技术,可以有效解决复杂地质情况下预应力管桩施工工艺存在的此类问题。By optimizing the arrangement of non prestressed and prestressed steel bars,improving the concrete strength grade of the pile body,improving the material and structure of the end plate,a large-diameter mixed reinforced prestressed concrete pipe pile with higher bending performance has been developed,which is suitable for deep excavation projects with higher requirements for bending and shear performance.However,conventional prestressed pipe pile construction techniques such as hammering and static pressure are prone to problems such as pile breakage and deviation in deep soft soil layers and uneven weathered rock layers.Through engineering practice,this project adopts a large diameter drilling and pipe pile construction technology without mud protection and low noise,which can effectively solve the problems in the construction process of prestressed pipe piles under complex geologicalconditions.

关 键 词：深基坑 混合配筋管桩 抗弯性能 随钻跟管桩技术 

分 类 号：TU473.1[建筑科学—结构工程]