STUDY ON CIVIL COST CONTROL OF URBAN RAIL TRANSIT UNDERGROUND STATION

Civil construction cost of underground station is a major part of the cost of urban rail transit system. Based on the final accounting cost data of underground station of Nanking Metro Line 1 and Guangzhou Metro Line 2, the influencing factors of urban rail transit underground station cost are analyzed in this paper, and the conclusion that the scales of the station is the determinant element is reached. Although construction methods affect the cost very much, the choice of construction methods is inflexible. Therefore, the essence of cost control of underground station is to determine a reasonable scale, which not only enables satisfying operation but also cause no redundant space. Under this principle, measures are presented, including the innovative modified method for calculating platform width, the concept of coordinating layout and consolidating station management and equipment rooms, and choosing environment control system modes in accordance with local conditions. According to the case study presented, by counting in the space between the stairways as boarding area, the modified method can subtract the width of platforms and the civil cost of the station by more than 10million RMB. Case study also demonstrates that platform door systems can curtail civil cost through cutting down the cooling load.