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2009年 12月探矿工程(岩土钻掘工程) 69
旋喷桩在盾构法隧道端头井洞口土体
加固工程中的应用
高成梁 1 , 梁小强 2
(1. 长春工程学院,吉林长春 130021; 2. 中南大学,湖南长沙 410083)
摘要:盾构法隧道在进行盾构机的始发或到达作业时,当既有端头井洞口挡土墙结构凿除后,保证该位置土体在
盾构机刀盘贯入或脱离地层前一段时间内的稳定就成了盾构机始发或到达施工的关键。结合工程实例,从高压注
浆原理、注浆参数和施工工艺等方面阐述了二重管旋喷桩在盾构法隧道端头井洞口土体加固工程中的应用。再
者,针对旋喷桩加固以及与其相关的盾构始发或到达施工技术方面的一些问题也提出了一些建议和看法。
关键词:旋喷桩;盾构法隧道;洞口;加固
中图分类号: U455. 4 文献标识码: A 文章编号: 1672 - 7428 (2009) 12 - 0069 - 04
Applica tion of H igh pressure Sp ira l Jet Grouting P iles in Sh ield Tunnel Porta l So il Re inforcem en t Eng ineer ing /
GAO Cheng liang1 , L IANG X iao qiang2 (1. Changchun Institute of Technology, Changchun J inlin 130021, China; 2. Cen
tral South University, Changsha Hunan 410083, China)
Abstract: W hen the shield launching or arrival is under construction in the shield tunnel, it es the key to keep the
soil stability in a period of the time before the rotary cutter head of shield machine rating into or drilling through the
stratum. Based on the engineering case, this paper discussed the app lication of dual p ipe highp ressure sp iral jet grouting
p iles in shield tunnel portal soil reinforcement about the p rincip le of highp ressure grouting, the grouting parameters and the
construction technology. And some suggestions are put forward for sp iral jet p ile reinforcement and construction issues on
shield launching or arrival.