双壁开口管桩大尺度模型试验初探  

PRELIMINARY TEST OF LARGE SCALE MODEL FOR DOUBLE WALL OPEN-ENDED PIPE PILE

作　　者：刘俊伟[1] 赵国晓 王明明[1] 赵彦平 LIU Junwei;ZHAO Guoxiao;WANG Mingming;ZHAO Yanping(School of Civil Engineering,Qingdao University of Technology,Qingdao 266033,China)

机构地区：[1]青岛理工大学土木工程学院

出　　处：《工业建筑》2018年第8期122-127,共6页Industrial Construction

基　　金：国家自然科学基金项目(41502304);教育部高等学校博士学科点专项科研基金项目(20133721110004);山东省高等学校科技计划项目(J14LG04);中国博士后科学基金(2015M581940);青岛市应用基础研究项目(16-5-1-34-jch);住房和城乡建设部科学技术计划项目(2014-K3-026)

摘　　要：开口管桩由于具有承载力高、质量可靠、施工方便等优点得到越来越广泛的应用。土塞的生成使得开口管桩沉桩阻力不同于闭口管桩,不仅包括桩外侧摩阻力、桩端阻力,桩内侧摩阻力亦是其重要组成部分,不同桩靴形式对桩体贯入影响较大。从试验方法、试验方案、试验结果 3个方面阐述了国内外现状,针对目前研究中的不足,设计了可区分端承阻力、土塞阻力、外侧摩阻力,以及不同桩靴形式的双壁开口模型桩,比较了不同桩靴对土塞内、外侧摩阻力的影响。Due to high bearing capacity,reliable quality and convenient construction,the open-ended pipe piles were widely used. The plug effect leads to the piling resistance of open-ended piles different from that of the closed pipe pile,the piling resistance of open-ended piles includes outer friction resistance,resistance of pile tip,and inner friction resistance of the pile. The different types of pile shoes have a great influence on the penetration of pile. The domestic and foreign research status in present was expounded from three aspects of test method,test scheme and test result. In view of the deficiency in current research,a double wall open-ended pipe pile model with different pile shoe forms was designed,it could distinguish the tip resistance,soil plug resistance and outer frictional resistance.The effects of pile shoe form on the inner and outer frictional resistance were compared.

关 键 词：沉桩阻力 外侧摩阻力 桩端阻力 桩靴 土塞效应 双壁开口模型桩 

分 类 号：TU473.1[建筑科学—结构工程]