Undermining Construction Technique Research On Suzhou Street Subway Station Of Beijing City

This paper takes the project of Suzhou street subway station of the Beijing city as an example, to elaborate the application of undermining method construction techniques and the safety figures during the construction of subway stations. The open surface method beside bumper-to-bumper traffic intersection may be much difficult as the management of the traffic being too hard. While the undermining method could resolve these problems commendably though the cost index and the difficulty of technique will rise. It's especially important to enhance drainage so that to keep the construction of the station under anhydrous state when excavating in Beijing's silty clay environment. To insure the construction process successful with monitoring and construction guiding.In this paper we compared and analyze the settlement and the steric effect of the tunnel arch crown in both theory and practice aspects to demonstrate the feasibility and the construction effect, introduced the constructional technics of the steel-pipe columns and the long-pipe sheds so as to supply a reference to the construction enterprises.