施工技术 2014年10月上 48 CONSTRUCTION TECHNOLOGY 第43卷第19期 D01:10.7672/sgjs2014190048 旋挖钻孔桩沉渣产生原因及清孔工艺优化选择 雷斌，叶坤，李榛，柴源 (深圳市工勘岩土工程有限公司，广东深圳518026) [摘要]随着旋挖钻孔灌注桩的广泛应用，桩底沉渣过厚成为突出的质量通病.结合旋挖钻孔灌注桩的施工实践， 分析了桩底沉渣过厚产生的原因，介绍了6种泥浆正循环、反循环、无循环清孔工艺和方法，并对比分析了各种清 孔工艺的特点，提出了旋挖桩清孔工艺的优化选择方法. [关键词]桩；旋挖钻孔桩；沉渣；清孔；施工工艺；优化 [中图分类号]TU753.3 [文献标识码]A [文章编号]1002-8498(2014)19-0048-06 Causes of Sediment at the Bottom of Rotating Drilling Pile and Optimal Selection of Hole Cleaning Method Lei Bin Ye Kun Li Zhen Chai Yuan Shenzhen Gonghan Geotechnical Engineering Co.Lad.Shenzhen Guangdong 518026 China) Abstract:With the widely applieation of the rotating drilling pile the overweighting sediment at the hole bottom is being one of the most prominent quality problems.This paper has analyzed the causes of the overweighting sediment at the hole bottom which is based on the author's construction practice experience of working on rotating excavation drilling cast-in-place pile.In addition it also introduces six holes cleaning methods including the slurry direct circulation slurry reverse circulation non-cycle and so on.And by the parison analysis of all the hole cleaning methods the authors give an optimal selection method of cleaning process in the rotating excavation drilling pile. Key words:piles;rotating drilling pile;sediments;hole cleaning;construction;optimization 0引言 编制相关旋挖钻孔桩施工技术规范，仍未形成系统 随着旋挖钻机整体性能的提升以及旋挖钻具的工法研究，施工过程中大量的旋挖成桩质量问题 的不断改进，旋挖钻孔桩已广泛应用于桩基础工程 也随之产生，桩底沉渣过厚即是较普遍的质量通病 施工.据不完全统计，目前在深圳及周边地区使用之一.桩底沉渣超标或过...
旋挖钻孔桩沉渣产生原因及清孔工艺优化选择.pdf
