Research on Demolition Technology for Secondary Lining in Diseased Tunnel
Jixinling Tunnel on Wuxi-Zhenping Expressway is a two-hole four-lane expressway tunnel with two-way traffic.The tunnel adopts electric lighting,mechanical ventilation and self drainage.Due to the increase of water pressure behind the lining in some sections,the cracks in secondary lining are serious,which affects the appearance and operation safety of the tunnel.Based on this,it is necessary to demolish and replace the secondary lining.Due to the need to ensure construction safety,the blasting crushing disturbance is large,and the chemical static crushing speed is slow,it is determined that the method of mechanical crushing demolition from the arch top to the foot after creating the seismic isolation and absorption belt is adopted after research and discussion,and the demolition is pushed from both ends to the center of the crack section to ensure safety.Through theoretical analysis and practical application,the safety,reliability and operability of mechanical crushing demolition are verified.
NETL
NSTL
万方数据
维普
