Study on the Values of Anti-floating Fortification Water Level for the Underground Structure in the Starting Area of Xiongan-Beijing Daxing International Airport Express Line
The anti-floating water level directly affects the safety and construction cost of an underground structure.Therefore,it is of great social significance and economic value to determine the anti-floating water level of underground structures scientifically and reasonably.Taking the underground structure of the Express Railway Line from Xiongan New Area to Beijing Daxing International Airport as the research object,this study systematically analyzed the hydrogeological conditions and the interannual dynamic variation of the groundwater level in the study area and used the numerical simulation method and analog forecasting method to determine a recommended value of the anti-floating water level elevation of the underground structure.The results showed that the depth of shallow groundwater at this site is generally 5 to 20 m and that the elevation of the groundwater level is generally-10 to 1 m.In the past five years,the elevation of the shallow groundwater level at the site has generally been-5 to-10 m,and the burial depth has generally been 3 to 15 m.The groundwater level has been increasing each year,and the recovery rate is approximately 1 m/a.The numerical simulation method was used to predict a recommended value of the anti-floating water level of the underground structure during its service life.The results serve the anti-floating design of the Express Line from Xiongan New Area to the Beijing Daxing International Airport(Line R1)project site and provide a demonstration of anti-floating safety design of major engineering construction projects in Xiongan New Area.
Xiongan New Areahydrogeological conditionsnumerical simulationanalog predictionanti-floating fortification water level
万方数据
维普
