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隧道建设(中英文) ›› 2015, Vol. 35 ›› Issue (9): 928-934.DOI: 10.3973/j.issn.1672-741X.2015.09.011

• 施工技术 • 上一篇    下一篇

土压平衡盾构在砂层中掘进的渣土改良技术

蔡辉   

  1. (中铁隧道集团公司专用设备中心, 河南洛阳 471009)
  • 收稿日期:2015-05-07 修回日期:2015-05-29 出版日期:2015-09-20 发布日期:2015-09-22
  • 作者简介:蔡辉(1978—),男,河南夏邑人,1998年毕业于北京理工大学,机械电子工程专业,本科,高级工程师,现从事盾构/TBM及大型专用设备管理工作。

Ground Conditioning Technology for EPB Shield Tunneling in Sand Strata

CAI Hui   

  1. (Tunnelingdedicated Equipment Center of China Railway Tunnel Group Co., Ltd., Luoyang 471009, Henan, China)
  • Received:2015-05-07 Revised:2015-05-29 Online:2015-09-20 Published:2015-09-22

摘要:

渣土改良技术是土压平衡盾构在砂层中掘进的关键。结合南昌、郑州和西安地铁区间隧道盾构施工实例,对土压平衡盾构砂性地层改良技术的应用进行系统的调查研究,采用膨润土泥浆、泡沫剂、聚合物等添加剂对不同的砂性地层进行渣土改良,分析膨润土泥浆、泡沫剂、泥浆与泡沫剂相结合、泥浆与聚合物相结合等对砂性地层改良的作用机制和特点,总结盾构在不同砂性地层中掘进采取的渣土改良技术措施,指出渣土改良技术目前的使用及研究现状,以期为今后类似工程提供参考和借鉴。

关键词: 土压平衡盾构, 砂层, 渣土改良, 加剂

Abstract:

Ground conditioning is paramount for successful EPB tunneling in sand strata. Additives like bentonite slurry, foam and polymer are commonly used for ground conditioning in various sand strata, so as to guarantee safe and smooth tunneling. In the paper, the problems encountered during shield tunneling in sand strata in Nanchang, Zhengzhou and Xi’an are presented and the ground conditioning technologies used are described. The ground conditioning measures for shield tunneling in sand strata are summarized, and the stateofart of ground conditioning technology is discussed. 

Key words: EPB shield, and strata, round conditioning, dditives

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