Analysis Of Building To Subway Tunnel Blasting Vibration

When the subway tunneling excavation uses the method of blasting construction,it produces blasting vibration hazards for surface buildings. The vibration response characteristics of the surface buildings under the action of blasting vibration is the focus research areas in blasting vibration. It is very important to grasp the regularity of characteristics for subway tunnel construction. Relying on the Urumqi Metro Line One Project, field vibration monitoring was carried as the main research method. Two building were selected as research object to be monitored. They were a frame shear structure high-rise building and a low-rise masonry structure building, both near the subway construction. Through analyzing data of blasting vibration, characteristics of building responding to tunnel blasting vibration were studied. The main contents and conclusions were as follows:(1) With the increase of the floors, horizontal radial vibration peak velocity of the low-rise masonry structure building showed a trend of first increase and then decrease; horizontal tangential vibration peak velocity and vertical vibration peak velocity showed increasing.(2) With the increase of the floors, horizontal radial vibration peak velocity of the frame shear structure high-rise building showed decreasing; horizontal tangential vibration peak velocity and vertical vibration peak velocity showed a trend of first decrease after increasing.(3) Used the method of 4 tunnel work face detonating together, the monitored vibration velocity is very small. That could satisfy the requirements of rapid construction project.(4) The length and width dimensions of building will effect vibration velocity in the horizontal direction in a certain range.