Abstract
This paper takes Yazhugou Tunnel, a highway project in the upper reaches of the Yalong River as the example to summarize the application of smooth blasting in the Yazhugou Tunnel from the aspects of the feasibility, resource allocation, blasting parameters, drilling and blasting technology and the guarantee measures, with the construction characteristics of the tunnel blasting, the type of surrounding rocks, construction technology and cost taken into consideration.
Highlights
Blasting control plays an important role in the over-under-break during the construction of highway tunnels
The Yazhugou Tunnel is located at the B-mark between the Youlaxi Ditch and Yazhu Ditch, and it is on the traffic reconstruction road of the upstream hydropower station on the Yalong River
The bedrock of the Yazhugou Tunnel entrance is Triassic-Yajiang strongly-withered weakly-withered metamorphic stone plate mixed with sand
Summary
Blasting control plays an important role in the over-under-break during the construction of highway tunnels. Due to the influence of surrounding rock type, construction technology and cost, the constructor tends to choose different excavation techniques. This paper illustrates the feasibility and construction calculation by taking the excavation of the Yazhugou Tunnel as the example
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