1、 1 摘摘 要要 灌注桩是指在工程现场通过机械钻孔、 钢管挤土或人力挖掘等手段在地基土 中形成桩孔， 并在其内放置钢筋笼、 灌注混凝土而做成的桩， 依照成孔方法不同， 灌注桩又可分为沉管灌注桩、钻孔灌注桩和挖孔灌注桩等几类。钻孔灌注桩是按 成桩方法分类而定义的一种桩型。 随着建筑行业的不断发展钻孔灌注桩应用的 领域也越来越广泛，因此对其要求越发严格，促使该技术的总体水平不断提高, 迄今为止,除个别地区在复杂地层成孔方面存在一些难点外水下灌注等其它技术 都比较成熟 ,在施工方面不存在太大的障碍,鉴于对灌注桩的要求提高， 本文中介 绍了关于其常见问题及处理方案的内容。 钻孔灌注桩基础属隐蔽工程，且
2、影响其质量的因素较多，如不抓住重点进行 有效防控，就有可能发生质量问题，甚至质量事故，对社会和施工企业本身都造 成重大影响。 关键词：关键词：钻孔灌注桩 质量问题 分析 防范处理 办法 2 Abstract Filling pile in engineering field by means of mechanical drilling, steel tube soil compaction or human mining methods formed in foundation soil pile hole, and placed inside reinforcing cage, perfu
3、sion pile, made of concrete and in accordance with different methods and piles into holes and can be divided into driven cast-in-place piles, bored piles and dig-hole piles etc categories. According to the cast-in-place pile into piles of classification and define a kind of pile type. With the conti
4、nuous development of the construction industry field where the application of the cast-in-place pile, so more and more widely for its requirements, prompting the technology more strictly the overall level increases, so far, in addition to the individual regions in complex formation into hole there e
5、xist some difficulties in other technology outside underwater perfusion are more mature, in the construction aspect does not exist too big obstacle, in view of the requirements of piles, this paper introduces the improving on the common problems and treatment scheme content. The cast-in-place pile f
6、oundation belong to take cover engineering, and on the quality of many factors, such as not focusing on effective prevention and control, it may happen quality problem, even to society and quality accident and construction enterprise itself are a significant impact. Key words: bored cast-in-situ pile to prevent processing problem analysis 3 目目 录录 1 引言引言. 5 2 正循环回转钻孔灌注桩正循环回转钻孔灌注桩 . 5 3 施工工艺施工工艺 6 3.1 施工流程 6 3.2 施工放样 8 3.3 护筒埋设 8 3.4 钻机就位 8 3.5 泥浆制作 8 3.6 钻孔 9 3.7 终孔及清孔 9 3.8 钢筋 10 3.8.1 钢筋笼制作
