Construction Techniques of Large Municipal Tunnel in Pingxiang of Guangxi

Abstract:

Nonghuai tunnel is a large municipal tunnel in karst area of Pingxiang of Guangxi with karst development, this short tunnel is deep-buried and large-span. According to the geological conditions, drill-blast tunneling—new Austrian method was used; the principles of short cutting, weak blasting, advanced strong support and early lining were followed in broken sections of structural opening and surrounding rocks, the tunneling was successfully finished by comprehensive measures.