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隧道建设(中英文) ›› 2018, Vol. 38 ›› Issue (5): 846-850.DOI: 10.3973/j.issn.2096-4498.2018.05.019

• 施工技术 • 上一篇    下一篇

砂卵石地层泥水盾构施工技术难点及控制措施分析——以兰州地铁穿黄隧道工程为例

霍滨, 徐朝辉, 胡相龙, 郭贵斌   

  1. (兰州市轨道交通有限公司, 甘肃兰州 730030)
  • 收稿日期:2018-01-10 修回日期:2018-03-14 出版日期:2018-05-20 发布日期:2018-06-01
  • 作者简介:霍滨(1977—),男,陕西绥德人,2014年毕业于兰州理工大学,土木工程专业,本科,高级工程师,主要从事轨道设计管理及工程项目管理工作。Email: 870739405@qq.com。
  • 基金资助:

    国家自然科学基金资助项目(51478044,51678062); 兰州市人才创新创业科技计划资助项目(2016-RC-84)

Analysis of Technical Difficulties and Control Measures for Slurry Shield Boring in Sandy Cobble Strata: A Case Study of Yellow Rivercorssing Tunnel of Lanzhou Metro

HUO Bin, XU Zhaohui, HU Xianglong, GUO Guibin   

  1. (Lanzhou Rail Transit Co., Ltd., Lanzhou 730030, Gansu, China)
  • Received:2018-01-10 Revised:2018-03-14 Online:2018-05-20 Published:2018-06-01

摘要:

为解决泥水盾构在砂卵石地层掘进过程中所面临的刀盘结构磨损严重、刀盘开口率调节不便、刀具磨损严重、泥水环流系统堵塞以及泥浆管路磨损严重等工程技术难题,针对兰州地铁穿黄隧道工程富水砂卵石地层条件,提出刀盘结构适应性改进措施、刀具磨损控制措施、环流系统改进措施以及泥浆管路磨损控制措施。研究表明: 1)对刀盘结构进行适应性改进,可有效解决砂卵石地层刀盘结构磨损严重和刀盘开口率调节等问题; 2)将边缘单刃滚刀改为双刃滚刀,导流刀改为撕裂刀,可有效增强盾构刀具的耐磨性能,提高盾构的掘进效率; 3)从碎石系统改进和大漂石、卵石处理2个方面对盾构环流系统进行改进,可有效解决盾构环流系统堵塞的问题; 4)将整体泥浆管路分为3段,相邻管路之间用法兰盘连接,可有效解决泥浆管路局部磨损严重的难题。

关键词: 砂卵石地层, 泥水盾构, 隧道, 地铁, 刀盘开口率, 刀具磨损, 环流系统堵塞

Abstract:

Some technical difficulties, i.e. serious wear of cutterhead structure, inconvenient adjustment of opening rate of cutterhead, serious wear of cutting tools, blockage of circulation system and serious wear of slurry pipe, are often encountered when slurry shield boring in sandy cobble strata. Hence, countermeasures for the difficulties mentioned above are put forward by taking Yellow Rivercrossing Tunnel of Lanzhou Metro in waterrich sandy cobble strata for example. The study results show that: (1) The wear of cutterhead structure and adjustment of opening rate of cutterhead can be improved by adaptive improvement on cutterhead. (2) The abrasive resistance of the cutting tools and the shield boring efficiency can be improved by replacing the singleedge disc cutter by doubleedge disc cutter and diversion cutter by tearing cutter. (3) The blockage of circulation system can be solved by improving rock breaking system and largesize boulders treatment. (4) The serious local wear of slurry pipe can be solved by sectioning slurry pipe into 3 and connecting each section by flanges.

Key words: sandy cobble strata, slurry shield, tunnel, metro, opening rate of cutterhead, wear of cutting tools, blockage of circulation system

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