管桩水泥土复合基桩工程应用研究  

Study on Engineering Application of Composite Pile Made up of Jet-mixing Cement and PHC with Core Concrete

作　　者：宋义仲 程海涛 卜发东 马凤生 

机构地区：[1]山东省建筑科学研究院,山东济南250031

出　　处：《施工技术》2012年第3期89-91,99,共4页Construction Technology

基　　金：住建部2010年科学技术项目计划(2010-K3-24)

摘　　要：管桩水泥土复合基桩是一种获得国家发明专利的新桩型,由高喷搅拌水泥土桩与同心植入的高强预应力管桩优化匹配复合而成。结合聊城某工程实例,首先介绍了桩基设计及优化过程;然后分析了施工机械及工艺,提出了喷浆工艺、沉桩时间间隔、桩位偏差控制等关键技术;最后应用效果表明,管桩水泥土复合基桩单桩承载力、桩位偏差均满足设计与规范要求,与同地区钻孔灌注桩相比施工效率基本相当,造价降低约35%。Composite pile made up of jet-mixing cement and PHC with core concrete（CPCP） is a new kind of piles which has been granted invention patent of China.The CPCP consists of external jet-mixing cement pile and PHC in the inner core.The design and optimum of CPCP is introduced at first combined with engineering application in Liaocheng.Construction equipments and process of CPCP are analyzed then.Key construction techniques such as grouting process,reasonable time of sinking PHC and controlling method of CPCP offsetting are proposed.At last,application effects show that bearing capacity and offsetting of CPCP can meet the requirements of design and national codes.Compared with bored piles in soft soil,engineering cost of CPCP decreases by 35% with basically same construction efficiency.

关 键 词：桩基础 管桩 水泥土 复合基桩 承载力 施工技术 

分 类 号：TU472.32[建筑科学—结构工程]