2015年2月下 施工技术 第44卷第4期 CONSTRUCTION TECHNOLOGY 81 D0I:10.7672/5j52015040081 钢筋隔离技术在钻孔灌注桩桩头处理上的应用 郑先奇，宋中锋 (中铁十六局集团第三工程有限公司，浙江湖州313000) [摘要]结合京沪高速铁路三标荆河特大桥钻孔灌注桩桩头处理施工实例，介绍钢筋隔离技术在钻孔灌注桩桩头 处理上的应用.在桩头竖向钢筋、钢筋笼的吊筋和声测管上预先安装橡塑发泡管、硬质塑料管，将桩头竖向钢筋、 钢筋笼的吊筋和声测管与钻孔桩混凝土进行隔离.在进行桩头处理时，采用人工在设计桩顶周围垂直钻孔打人钢 楔子或用液压膨胀劈裂机将桩头上部多余的混凝土整体膨胀劈裂分离，用起重设备将桩头整体起吊分离. [关键词]桩基础；钻孔灌注桩；桩头；处理；钢筋隔离；膨胀劈裂；整体起吊分离 [中图分类号]TU753.3 [文献标识码]A [文章编号]1002-8498(2015)04-0081-04 Application of Steel Bars Isolation Technology in the Treatment of Bored Piles Head Zheng Xianqi Song Zhongfeng (The 3rd Engineering Co. Lid.China Railcay 16th Bureau Group Huzhou Zhejiang 313000 China) Abstract:The application of steel bars isolation technology in bored piles head treatment is introduced bining with Jing River bridge bored pile head treatment of Beijing-Shanghai high-speed railway.Foam rubber tube and hard plastic tube are preinstalled in the pile head vertical steel bar reinforcement cage hanger steel bars and acoustic pipe in order to isolate them.During the treatment of pile head personnel vertically drill steel wedges into pile top or use splitting machine with hydraulic expansion for isolating the extra concrete upper pile head or separating pile head overall by lifting with hoisting equipment. Key words:piles;bored piles;pile head;treatment;steel bars isolation expansion and splitting;overall separation by lifting 1工程概况 于各类土木工程.钻孔灌注桩在水下混凝土灌注 京沪高速铁路三标荆河特大桥位于山东省滕 过程中，桩顶是较厚的浮浆和泥浆沉淀物.钻孔桩 州市境内，桥梁全长11.445km 孔跨布置20m×24m 水下混凝土灌注，必须超灌到设计桩长以外...
钢筋隔离技术在钻孔灌注桩桩头处理上的应用.pdf
