Exploration of Quick Entry Method for High Steep Slope and Small Clear Distance Bias Pressure Tunnel with Weak Surrounding Rock
Based on the actual working conditions of a long highway tunnel with high and steep slopes and small clear distance bias pressure in a weak stratum,construction technology exploration is carried out.A comprehensive application of differentiated tunnel entry technology,zero excavation tunneling technology,comprehensive auxiliary construction technical measures,and comprehensive monitoring technology is pro-posed to form a comprehensive technical system of excavation support and monitoring.The green construction concept is practiced,and safe and fast tunnel entry is achieved before the establishment of the entrance platform.This effectively solves the problems of narrow arch construc-tion platform,difficult overall pouring of arch,and complex road tunnel connection when entering high and steep slope tunnels.It is an effec-tive method for entering high and steep slope tunnels.
Highway tunnelWeak surrounding rockRapid construction of tunnel entrance
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