Study On Joint Construction Impact Of Metro Paralleling Transfer Station Upon Structure Of Existing Metro Stations

ABSTRACT:Along with the rapid development of urban construction, subway construction in China has entered a period of unprecedented development, the continuous expansion and extension of the metro requires a variety of transfer methods, in parallel with the transfer station is one of them. As the subway transfer station building parallel access is very difficult to help, but no similar experience in such projects for reference, it is necessary to combine the station of Beijing Subway Songjiazhuang the structure of the complex analysis and calculation, to determine its construction program and construction of new stations on existing stations internal forces.In this thesis, the station of Beijing Subway Songjiazhuang of engineering practice, to help pick up the station building on the existing structure of the station were analyzed. Through the establishment of stratigraphic structure model and load model, calculate the new structure during the construction pit at the bottom of the existing soil line on the vertical structure, horizontal displacement, evaluation of existing structures and lines of influence connecting reserved under changing conditions treatment program. Based on the theory of construction mechanics, through the simulation of typical conditions, based on different construction scheme on the 5th line Songjiazhuang station structure was calculated deflection analyzed and compared to determine a reasonable construction plan. Structural model of load analysis of reinforced junction connecting device failure on the impact of existing stations, and the overall evaluation of internal force and displacement.