Study On Construction Risk Management And Control Of The Jiang-Ji Metro Section

Our country’s construction project of subway has entered into rapidly developedperiod. As the construction involving many aspects with complexity technical, highlycomprehensive, it lies high risk during the process of construction. In that case we shouldadopt proper measures to try to avoid accidents. So the paper has discussed the difficultiesabout ventilation shaft of Wuhan subway Jiang-Ji Section（Jianghan road station-Jiyubridge station）, the shield undercrossing the ventilation shaft, and the safety andprotection of adjacent structures to ensure the successful completion of the construction.Under the analysis of the main ventilation shaft pit risk, the paper put forwardmeasures to deal with common risks in the aspect of lateralis shaft maintenance, pitexcavation and dewatering, construction monitor, and takes the construction of Wuhansubway ventilation shaft as an example analyzing the risk control measures. In order tomake the shield successfully undercrossing the ventilation shaft, we must ensure that wallson both sides of the soil structural are stability and safety. This paper discusses reasonablechoices of shield through and reinforcement scheme. The construction of Wuhan Metrousing plain concrete diaphragm wall, high pressure revolve jet, freezing, ventilation shaftbackfilling and other measures to ensure the shield pass the vent well successfully. Therisk factors of building safety various during the tunnel construction, the paper proposesbuilding safety extension synthesize evaluation model with tunnel parameters, soilproperties, buildings and other factors as indicators, and then gives the level of buildingsafety standards for tunnel construction. According to the different security levels,appropriate precautions could be used to avoid buildings damage by tunnel construction.