大直径超深、超厚嵌岩旋挖灌注桩梅花形成孔施工技术  

Construction Technology of Plum Blossom Type Hole-forming for Large-diameter Ultra-deep Ultra-thick Rock-socketed Rotary Bored Pile

作　　者：李耀良 陈益贵 黄磊 罗云峰 LI Yaoliang;CHEN Yigui;HUANG Lei;LUO Yunfeng(Shanghai Foundation Engineering Group Co.,Ltd.,Shanghai 200002,China)

机构地区：[1]上海市基础工程集团有限公司,上海200002

出　　处：《建筑施工》2020年第3期310-312,共3页Building Construction

摘　　要：为解决大直径超深、超厚嵌岩旋挖灌注桩施工质量把控难度大、成孔效率低等问题,以深圳金地中心桩基础工程项目为研究背景,对大直径超深、超厚嵌岩旋挖灌注桩的成孔技术进行了研究。通过在施工现场同时使用常规“三刀切”施工工艺与梅花形成孔施工工艺进行施工,并对施工效率进行对比,最终选择了梅花形成孔施工工艺。该工艺在保证成孔质量的同时,提高了成孔效率,可在今后施工中进行推广。To solve the problems of ultra-deep ultra-thick rock-socketed rotary bored pile construction quality control difficulty and low hole-forming efficiency,based on the research background of Shenzhen Jindi Center pile foundation project,the hole-forming technology of large-diameter ultra-deep ultra-thick rock-socketed rotary bored pile is studied.By using the conventional"three times in borehole-forming"construction technology and the plum blossom type holeforming construction technology at the same time on the construction site,and comparing the construction efficiency,the plum blossom type hole-forming construction technology is finally selected.The technology can accelerate the efficiency of hole-forming,and has better quality of hole-forming,which can be popularized in the future construction.

关 键 词：旋挖灌注桩 大直径 超深超厚嵌岩 梅花形成孔 

分 类 号：TU753[建筑科学—建筑技术科学]