土工基础

›› 2014, Vol. 28 ›› Issue (5): 99-101.

• 工程实录 • 上一篇    下一篇

天井山隧道开挖爆破振动现场监测与分析

赵栋琪，赵灿元   

  1. （云南省大丽高速公路建设指挥部，昆明 650200）
  • 收稿日期:2014-05-13 出版日期:2014-10-20 发布日期:2014-10-28
  • 作者简介:赵栋琪（1966-），高级工程师，研究方向为公路工程、桥梁与隧道建设。

Excavation Blasting Vibration Monitoring and Analysis in the Tianjingshan Tunnel

ZHAO Dongqi， ZHAO Canyuan   

  1. （Yunnan Dali Expressway Construction Project Office, Kunming 650200）
  • Received:2014-05-13 Online:2014-10-20 Published:2014-10-28

摘要： 开展了天井山隧道开挖爆破振动现场监测试验，在邻近隧道监测到的最大振动速度分别为0.11 m/s和0.10 m/s，其最大振动方向为垂直于隧道临空面的径向。监测结果表明，天井山隧道当前爆破开挖对邻近隧道的影响较小，可以保证邻近隧道的安全与稳定；研究表明，开挖爆破应力波在软弱破碎围岩中的传播明显受到削弱，设计规范偏于保守，施工中应因地制宜，在加强观测、保证安全的前提下，提高施工效率。

关键词: 开挖, 爆破振动, 现场监测, 稳定性, 应力波

Abstract: The excavation blasting vibration monitoring of Tianjingshan tunnel results are presented in this paper. The measured peak particle velocities (PPV) in the adjacent tunnels are 0.11 cm/s and 0.10 cm/s, respectively. And the maximum vibration direction is in the radius direction that is perpendicular to the tunnel wall. The results indicate that the blasting excavation method used in the Tianjingshan Tunnel has a minor impact on the adjacent tunnels. The stability and safety of the effect tunnels can be warranted. It is also concluded that the stress wave induced by the blasting is significantly reduced in the broken rock mass and the code requirements seem to be conservative. In the construction, the PPV can be adjusted accordingly if a comprehensive monitoring program is implemented.

Key words: Tunnel Excavation, Blasting Induced Vibration, Field Monitoring, Stability, Stress Wave