厚层近海回填抛石填土层钻孔灌注桩施工技术
投稿时间:2019-10-15  修订日期:2019-11-18  点此下载全文
引用本文:姜晓平,陈明锐.厚层近海回填抛石填土层钻孔灌注桩施工技术[J].钻探工程,2020,47(2):83-87.
JIANG Xiaoping,CHEN Mingrui. Construction technology of bored pile for thick offshore backfill and stone layers[J]. Drilling Engineering, 2020,47(2):83-87.
摘要点击次数: 997
全文下载次数: 560
作者单位E-mail
姜晓平* 山东正元地质勘查院 xiaoping781@126.com 
陈明锐 山东正元建设工程有限责任公司 27548384@qq.com 
中文摘要:烟台港万华工业园码头工程改造项目,设计采用φ600、1000 mm的钻孔灌注桩。上部为厚层近海回填抛石填土层,钻进困难,极易塌孔,成孔难度大,采用大型旋挖钻机带护筒跟管钻进成孔,内外二层套管护壁,穿过回填层及混砂层后,采用泥浆护壁旋挖钻机继续钻进,护筒不再跟进,既可保证成孔质量又能降低施工成本。外护筒可在灌注完成后拔出,重复利用,减少工程造价。
中文关键词:抛石填土层  钻孔灌注桩  旋挖钻机  跟管钻进  二层套管
 
Construction technology of bored pile for thick offshore backfill and stone layers
Abstract:Bored piles of 600 and 1000mm diameter are designed for the Yantai Port Wanhua Industrial Park wharf upgrading project. The upper part is a thick layer of offshore backfilled stones, which is difficult to drill, prone to collapse, and difficult to form a hole. A large rotary drilling rig was used to drill the hole with the sim-casing process, where two layers of casing (inner and outer) were used to protective the wall. After drilling through the backfill layer and the mixed sand layer, the rotary drilling rig continued drilling with mud for wall protection, but the protection casing was no longer followed. In such a way, not only can the quality of the hole formation be ensured, but also the construction cost reduced. The outer casing can be pulled out after the completion of concreting and be re-used to reduce the project cost.
keywords:backfill and stone layer  bored pile  rotary drilling rig  drilling with casing  two-layer casing
查看全文  查看/发表评论  下载PDF阅读器