土工基础

›› 2014, Vol. 28 ›› Issue (6): 17-20.

• 工程实录 • 上一篇    下一篇

高水压粉砂地层泥水盾构水下到达施工技术

侯建军1,肖铭钊2   

  1. （1.中国水利水电第八工程局有限公司，长沙 410000；2.武汉市市政建设集团有限公司，武汉 430023）
  • 收稿日期:2014-11-17 出版日期:2014-12-25 发布日期:2015-01-12
  • 作者简介:侯建军（1980-），男，工程师，研究方向为隧道及地下工程施工。

SlurryShield Excavations in High Water Pressure in Silty Sand Soils at the Underwater Receiving End

HOU Jianjun1, XIAO Minzhao2   

  1. (1.Sinohydropower Bureau 8 Co., Ltd., Changsha, 410000；2.Wuhan Municipal Construction Engineering Group Co., Ltd., Wuhan 430023)
  • Received:2014-11-17 Online:2014-12-25 Published:2015-01-12

摘要： 结合武汉地铁二号线越江隧道工程水下到达的施工经验，介绍了如何创造条件实现泥水盾构水下到达，安全可靠地完成泥水盾构到达施工，重点论述了端头旋喷加固、冷冻加固以及基坑回填、盾构掘进等水下到达关键施工技术。该工程采用端头旋喷加固和冷冻加固技术相结合，洞门破除后实施基坑回填，成功地解决了盾构到达过程中高水压风险，可为类似工程提供一定的参考和借鉴。

关键词: 盾构施工, 水下到达, 旋喷加固, 冷冻加固, 基坑回填

Abstract: The construction techniques for the slurryshielded excavation at the underwater receiving end of the tunnel are introduced in the paper with a case history of the Wuhan Metro Line No.2 Project crossing the Yangtze River. The paper emphasizes the key techniques, such as, jet grouting reinforcement, ground freezing reinforcement at the receiving end, backfill of the vertical shaft and the shielded excavation. In Metro Line No.2 Project, both the jet grout and the ground freeze are used for the ground improvement and the backfill operation is performed immediately after the excavation reached the end. These new techniques provide examples for resolving the high water pressure difficulties in the shielded excavations.

Key words: Shielded Excavation, Underwater Reaching the Receiving End, Jet Grout, Ground Freeze, Excavation Backfill