土工基础

›› 2018, Vol. 32 ›› Issue (4): 365-368.

• 工程实录 •    下一篇

浅析N-J工程不良地质条件下敞开式TBM掘进施工

曾玲珑，雷尚文   

  1. （中国葛洲坝集团巴基斯坦N-J项目部，湖北宜昌 443002）
  • 收稿日期:2017-07-13 修回日期:2017-07-20 出版日期:2018-08-20 发布日期:2018-08-23
  • 作者简介:曾玲珑（1963-），男，高级工程师，研究方向为水电工程质量及安全管理。

Analysis of the Open-Type TBM Excavation in Poor Geological Conditions in Pakistan N-J Hydropower Project

ZENG Linglong， LEI Shangwen   

  1. （CGGC N-J Pakistan Project Management, Yichang 443002）
  • Received:2017-07-13 Revised:2017-07-20 Online:2018-08-20 Published:2018-08-23

摘要： 为解决不良地质条件对TBM掘进施工造成的极大困难，结合N-J水电站工程引水隧洞敞开式TBM掘进段试掘进期间的施工实践，首先总结了敞开式TBM隧洞围岩分级方法；然后根据收敛变形、多点位移计等监测结果，通过不断调整、优化，总结了对应于TBM隧洞围岩分级的支护结构参数；最后将该支护结构参数与钻爆法的支护参数进行比较，给出了围岩破碎带敞开式TBM施工的技术措施，确保TBM能在安全、稳妥的条件下施工。

关键词: 敞开式TBM, 围岩分级, 支护结构, 不良地质条件

Abstract: The construction of the Pakistan NeelumJhelum (NJ) Hydropower Plant, which is in the northwest side of Himalaya Mountains, is primarily depend on the underground tunnel excavation in poor and complicated geological conditions and high overburden geopressures. Based on the construction of opentype TBM trail excavation at the headrace tunnel, the surrounding rock mass classification in opentype TBM tunnel was summarized, then the initial supporting parameters under the different surrounding rock mass conditions and technical measures of construction in the fracture zone have been determined.

Key words: Open-Type TBM, Surrounding Rock Mass Classifications, Supporting Structures, Poor Geological Conditions