土工基础

›› 2019, Vol. 33 ›› Issue (5): 533-535.

• 工程实录 •    下一篇

组合成孔工艺在无锡某地铁车站立柱桩施工中的应用

黄振波   

  1. (上海长凯岩土工程有限公司，江苏苏州 215028)
  • 收稿日期:2018-09-28 修回日期:2019-10-12 出版日期:2019-10-20 发布日期:2019-10-22
  • 作者简介:黄振波（1986-），男，硕士，研究方向为地基基础、岩土工程方面的设计、施工。

Application of Combined Boring Methods in Bored Reinforced Concrete Piles in a Subway Station Project in Wuxi City

HUANG Zhenbo   

  1. (Shanghai Changkai Geotechnical Engineering Co. Ltd., Suzhou 215028)
  • Received:2018-09-28 Revised:2019-10-12 Online:2019-10-20 Published:2019-10-22

摘要： 灌注桩成孔施工目前比较常规的工艺有正循环泥浆护壁成孔、反循环泥浆护壁成孔、冲击成孔以及旋挖钻机成孔。选择何种成孔方法应综合考虑地质条件、环境条件、工期和成本等因素。以无锡某地铁车站立柱灌注桩施工工程为例，分析了正循环钻孔、反循环钻孔和旋挖成孔各自的可行性、成孔质量、成孔效率、施工成本和存在的问题，指出上部黏土层采用反循环成孔+下部碎石土层采用旋挖成孔工艺最适合本工程施工。

关键词: 灌注桩, 正循环成孔, 反循环成孔, 旋挖成孔, 组合成孔

Abstract: Currently, the drilling and installation of the bored and castinplace reinforced concrete piles include positive circulation with slurry, reverse circulation with slurry, impact boring and allflight auger boring methods. The selection of an appropriate drilling method should comprehensively consider factors such as, subsurface conditions, environmental considerations, construction schedule and cost. The feasibility of positive circulation, reverse circulation and all flight auger boring methods, quality of borehole, and efficient of borehole installation and cost are comparatively evaluated. It is concluded that the reverse circulation method for upper cohesive soils and all flight auger boring method for the lower gravelly soils are the most cost effective combination approach.

Key words: Bored Piles, Positive Circulations, Reverse Circulations, All Flight Auger Boring, Combined Boring Methods