A Study of Controlled Blasting Techniques for
the Multi-Arch Songjiawan Tunne
(1 School of Civil Engineering, Wuhan University, Wuhan 430072; 2 College of Science, Wuhan University of Science and Technology, Wuhan 430065; 3 Construction Headquarters of Shiyan-Baihe Expressway, Shiyan 442000)
Abstract：
The geological conditions encountered during construction of the multi-arch Songjiawan tunnel on theShiyan-Baihe expressway were very complex, and such problems as overbreak, underbreak, an irregular tunnel profile, and cracks on the mid-partition presented themselves during blasting. According to the different surrounding rock classifications, the controlled blasting technique was adopted for this tunnel and the excavation method, blasting parameters, charging structure and priming circuit were optimized to decrease the blasting vibration and improve blasting effects.
CAI Lu-Jun-1,
2 ,
MA Jian-Jun-2 etc
.A Study of Controlled Blasting Techniques for
the Multi-Arch Songjiawan Tunne
[J] MODERN TUNNELLING TECHNOLOGY, 2014,V51(1): 192-198
2014, Vol. 51 