土工基础

›› 2017, Vol. 31 ›› Issue (6): 738-742.

• 工程实录 • 上一篇    下一篇

巴基斯坦N-J水电站引水隧洞TBM段支护参数的优化设计

彭会椿   

  1. （中国葛洲坝集团第三工程有限公司，西安 710000）
  • 收稿日期:2017-08-21 修回日期:2017-09-01 出版日期:2017-12-20 发布日期:2017-12-27
  • 作者简介:彭会椿（1982-），男，工程师，研究方向为水利水电工程施工、技术及质量管理。

Optimization of Supporting Strength Parameters for TBM Section of a Water-Carrying Tunnel of N-J Hydropower Station in Pakistan

PENG Huichun   

  1. (CGGC N-J Project Management in Pakistan, Xi’an 710000)
  • Received:2017-08-21 Revised:2017-09-01 Online:2017-12-20 Published:2017-12-27

摘要： 针对巴基斯坦N-J水电站深埋引水隧洞施工阶段存在的软岩变形问题，采用室内流变试验、现场监测与流变参数反演相结合的方式，对N-J水电站引水隧洞TBM施工段（N-J-TBM）隧道支护参数进行研究，并通过数值仿真、承载力校核等方式，对N-J-TBM各类围岩不同埋深段现有支护体系进行优化，提出增加Q5类围岩以及断层挤压段隧洞的喷射混凝土厚度，保证N-J-TBM隧道施工的安全与稳定，为工程的施工决策提供可靠的技术依据。

关键词: 流变, 软岩, 反演, 支护参数, 优化

Abstract: In order to solve the problem of soft rock deformation in the construction stage of a deep buried watercarrying tunnel of NJ Hydropower Station in Pakistan, a combined approach consisting of indoor rheological test, field monitoring and rheological parameter inversion was used to evaluate the tunnel supporting strength parameters of the TBM construction section (NJTBM) in NJ Hydropower Station. And the existing supporting systems at different depths of NJTBM in different types of surrounding rock were optimized by the numerical simulation and capacity checking. It is proposed to increase the thickness of concrete in Type Q5 surrounding rock mass and fault extrusion section to improve the safety and stability in the construction of NJTBM tunnel. This measure also provided as reliable technical basis for the construction of the project.

Key words: Rheology, Soft Rock, Inversion, Supporting Strength Parameters, Optimization