Abstract: A coverandcut Metro station is located in complex environment, where exist numerous underground utility lines and numerous adjacent buildings and structures. The Metro station is a “stationbridge combined” Metro station, with the bridge being built before the station construction. Comparison and contrast are made on the construction schemes of the Metro station, including the foundation pit excavation scheme, the steel pipe column hoisting scheme and the reinforced concrete support removing scheme, the advantages and disadvantages of these construction schemes are presented and the construction schemes are optimized. In the end, the scheme of “gantry crane + local ramp”, the scheme of site connecting of steel pipe columns by flanges and the scheme of cutting the reinforced concrete support by diamond cable saws are adopted, which guarantees the safety, quality and schedule of the Metro station construction.

Key words: complex environment, cover and cut method, Metro station, construction scheme, foundation pit excavation, steel pipe column hoisting, reinforced concrete bracing system