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隧道建设(中英文) ›› 2012, Vol. 32 ›› Issue (3): 377-382.DOI: 10.3973/j.issn.1672-741X.2012.03.021

• 施工技术 • 上一篇    下一篇

水平旋喷技术在软岩富水地铁隧道中的应用及优化

于忠波1 ,李世君2,施龙焱2   

  1. (1. 中铁隧道集团有限公司, 河南 洛阳 471009; 2. 中铁隧道集团二处有限公司, 河北 三河 065201)
  • 收稿日期:2012-03-05 修回日期:2012-04-12 出版日期:2012-06-20 发布日期:2012-07-09
  • 作者简介:于忠波(1972—),男,山东招远人,1996年毕业于重庆大学采矿工程专业,本科,高级工程师,现从事隧道及地下工程研究工作。

Application and Optimization of Horizontal Jet Grouting Piles in Construction of Tunnels in Waterrich Soft Rock Ground

YU Zhongbo1, LI Shijun2, SHI Longyan2   

  1. (1. China Railway Tunnel Group Co., Ltd., Luoyang 471009, Henan, China;  2. The 2nd Engineering Co., Ltd. of China Railway Tunnel Group, Sanhe 065201, Hebei, China)
  • Received:2012-03-05 Revised:2012-04-12 Online:2012-06-20 Published:2012-07-09

摘要: 青岛地铁一期工程M3线试验段区间隧道K15+838.35~+660埋深8.15~13.1m,穿越VI级富水砂层,地面环境复杂,施工风险极高。在地面不具备降水及垂直加固的条件下,为达到控沉防塌的效果,保证地面建筑物及洞内施工安全,应用洞内环向水平旋喷桩超前支护技术,同时,采用一系列相配套的超前支护技术及加固措施,弥补了水平旋喷桩在砂层及碎石层中不能咬合的缺陷,确保了富水软岩地铁隧道的开挖支护安全。

关键词: 富水软岩地铁隧道, 水平旋喷桩, 富水砂层, 桩间咬合, 超前小导管注浆

Abstract: K15+838.35~+660 section of the trial section of the first phase of line M3 of Qingdao Metro, with 8.15~13.1 m overburden, runs through Grade VI waterrich sand strata. Furthermore, the tunnel section has complex ground surface environment. Therefore, there is great risk in the construction of the tunnel section. However, dewatering and vertical reinforcement can not be executed from the ground surface. Therefore, horizontal jet grouting piles, as well as a series of advance reinforcement technologies are adopted, so as to guarantee the safety of the surface buildings and the tunneling labors. The disadvantage of horizontal jet grouting piles in sand strata and crushed stone strata, i.e., failure in interlocking, is solved, which guarantees the safety of tunneling in waterrich soft ground.

Key words: Metro tunnel in waterrich soft ground, horizontal jet grouting pile, waterrich sand strata, pile interlocking, grouting through advance small duct