Analysis Of The Influence On Adjacent Existing Buildings Subsidence Due To Metro Tunneling

Nowadays, with urban traffic developing rapidly, the amount of underground tunnelprojects has had an augmentation. Tunnel projections are constructed near or evenacross districts with the high density of buildings frequently due to the complexity ofurban environment, increasing the risk of unsafely for their surroundings. On theground of that, researches on how tunnel constructions affect the buildings on theearth surface are very necessary.The study taking xi ’an metro line 3 Ji Xiang village-Tai Bai south road for shallow tunnel digging tunnel as an example, analyzing the effect of the digging of the underground railroads through the theoretical analysis and field measurement method. The main contents are as follows:(1) This article below the upper structure, lower base and foundation combination is analyzed, according to the commonly used PECK formula to establish the surface settlement on the elastic foundation contains upper frame structure by shear, by bending the bottom of the shear bending beam model of strip foundation settlement and influence of the synergy is research.(2) Based on the analyzation and discussion of the influencing factor of the tunnel excavation to the adjacent building, the paper analyzes the rules and the degree of the influences.(3) Analysis of field monitoring by loess tunnel rock deformation characteristics in the construction process.(4) Based on past safety judgement building subsidence, this paper puts forward by internal force analysis of the basic methods to formulate feasible construction safety, more detailed concrete for construction safety evaluation and the three aspects of building, ground and tunnel control measures are put forward.