Study on Surface Vibration Velocity Characteristics and Settlement Patterns
Induced by Tunnel Blasting Construction
(1. State Key Laboratory of Intelligent Geotechnics and Tunnelling, Shenzhen 518060; 2. Key Laboratory of Coastal Urban Resilient Infrastructures (Shenzhen University), Ministry of Education, Shenzhen 518060; 3. College of Civil and Transportation Engineering,Shenzhen University, Shenzhen 518060; 4. Sinohydro Bureau 14th Co Ltd, Kunming 650041)
Abstract：
To investigate the correlation between surface settlement patterns and tunnel blasting vibrations, a case
study was conducted on the eastern tunnel of the Zhuhai Xingye Express Line (north section). Real-time monitoring and analysis were performed on the vibration velocity and frequency induced by tunnel blasting excavation. Additionally, tunnel structural reliability analysis was conducted using Copula theory. The results show that within different horizontal distance ranges from the blast center, vertical (Z) vibration velocities at monitoring points exceed radial(X) and tangential (Y) vibration velocities, while the frequency remains relatively stable. The maximum uplift and settlement occur on the left line of the tunnel, and monitoring points located between the left and right tunnel lines exhibit significant settlement variations, necessitating focused attention during construction. The Frank Copula function is recommended for constructing dependence models for tunnel structural reliability analysis, while the Clayton
Copula is unsuitable for modeling surface settlement. In practical engineering, the optimal Copula function should be selected based on specific data characteristics to accurately represent parameter dependency relationships.
2024, Vol. 61 