2011年5月下 施工技术 第40卷第341期 CONSTRUCTION TECHNOLOGY 23 天津117大厦高承载力超大长径比试验桩施工技术 王辉，余地华1，汪浩，郑利2 (1.中建三局工程总承包公司，北武汉430064：2.中建三局建设工程股份公司，湖北武汉430064) [摘要]基于天津117大厦试验桩工程，系统分析和研究了深厚砂土超深钻孔泥浆控制、超大长径比桩孔垂直度控 制、超长超重钢筋笼制作安装、超深水下浇注高性能自密实混凝土、可-硬塑土层竖向高密度点位环形注浆、超长 双护筒设计与施工等关键技术及成果.试柱超声波检测、静载试验和监测表明，主要质量控制指标满足设计要求. [关键词]钻孔灌注桩；长径比；自密实混凝土；超长双护 [中图分类号]TU753.3 [文献标识码]A [文章编号]1002-8498(2011)10-0023-03 Construction Technology of Test Piles with Super Large Length-diameter Ratio and High Bearing Capacity in Tianjin 117 Mansion Wang Hui' Yu Dihua' Wang Hao' Zheng LiP (1.General Construction Company of CCTEB Wuhan Hubei 430064 China: 2.China Construction Third Engineering Bureas Co.Lad.Wuhan Hubei 430064 China) Abstract:Combining with test piles of Tianjin 117 Mansion key construction technologies are analyzed and researched from ultra-deep drilling mud control at deep sand layers piles verticality control with super-large length-diameter ratio fabrication and installation of super large and heavy reinforcement cages high performance self-pacting concrete under the water to pour annular pouring at the vertical high density points as well was the design and construction of super-length double casing.The ultrasonic testing static load test and monitoring of the test piles show that the main quality control indexes meet design requirements. Key words:bored pile;length-diameter ratio;self-pacting concrete;super-length double casing 为提高单桩承载力、控制沉降变形，在超高层建采用静载试验检测.场地为海相与陆相交互沉积地 筑和大跨度桥梁结构中，经常采用超长、大直径钻孔层，120...
天津117大厦高承载力超大长径比试验桩施工技术.pdf
