摘要
简述了全回转套管钻机的国内外研究现状和应用领域。主要介绍了QHZ-2000型全回转套管钻机的设计结构、技术参数、关键技术。分析了全回转套管柱、冲抓斗、清障钻具的结构原理和应用特点。总结了全回转套管灌注桩、全套管清障和全套管拔桩的施工流程、机理和适用范围。研究填补了国内自主研发全回转套管钻机的空白,是一种适合在城市施工的绿色环保、广谱安全的无循环桩基施工新设备和新技术。
The paper summarized the research actuality and application fields both in China and abroad. The design struc- ture, specification and key techniques of QHZ - 2000 casing rotator are elaborated. The paper analyzes the structure princi- ple and the application characteristics of casing string, hammer grab and drilling tools for nndelground obstacles removal; and also summarizes the construction process, mechanism and applicable scope of full casing cast-in-place pile, under- ground obstacles removal and pile extraction in full casing. This study fills the gap of independent research and development of casing rotator in China; it is environmental, universal and safe piling equipment and a new foundation drilling method with no mud used in urban construction and foundation works.
出处
《探矿工程（岩土钻掘工程）》
2013年第9期29-36,共8页
Exploration Engineering:Rock & Soil Drilling and Tunneling
基金
科技部科研院所技术开发研究专项资金项目"ф2000全回转套管钻机
钻具及工艺"(2011EG130025)
关键词
全回转套管钻机
全套管施工
套管钻具
全套管清障
全套管拔桩
casing rotator
full casing construction
casing tools
underground obstacles removal in full casing
pile extraction in full casing
