Study on Blasting Construction of Highway Tunnel AcrossRailway Tunnel at Close Distance
About the author:
CCCC Road Bridge North China Engineering Co., Ltd., Beijing 101102, China
Abstract:
Taking the Daluquan No. 1 Tunnel of TJ2 section in the Chengde to Pinggu District, Beijingsection of the Capital Ring Expressway as an example, the influence of blasting construction of the newhighway tunnel on the existing high?speed railway tunnel is studied, and the micro?vibrationcomprehensive control blasting technology of the new tunnel arch smooth blasting and wall pre?splittingblasting, and blasting vibration control measures are introduced. The research results show that thedisplacement and stress changes of the main structure and track structure of the existing Ping’ anpuTunnel caused by the construction of Daluquan No. 1 Tunnel mainly occur in the construction period nearthe intersection of the two tunnels, and the deformation and stress of the main structure and trackstructure of the Ping’ anpu Tunnel are within the safe range.
