Research on Innovative Technology for Stability Control of Subway Shield Tunnel Excavation
At present,for the control of settlement and deformation during shield tunneling in metro,the conventional technical routes are mostly based on the field measured data to take measures such as adjusting the tunneling parameters,grouting inside the tunnel,and grouting outside the tunnel,which is a passive treatment measure after settlement,and there is a lag effect.Based on finding a way to solve the lag settlement,and further improve the existing shield tunneling technology ideas to ensure the safety of construction,this paper relies on the shield tunnel passing through the highway tunnel and the existing railway double-layer overlap area project in the section from Eurasia Shopping Mall Station to Feiyue Square Station of Changchun Metro Line 6 to carry out technological breakthroughs and research.By combining methods of theoretical analysis,prediction model building,training and field verification,the sensitive structures deformation control key techniques during the subway shield tunneling double-layered area at close range are studied.The main achievements are as follows:a prediction model based on improved particle swarm optimization support vector regression(IPSO-SVR)is constructed to provide a theoretical basis for the pre-control of settlement.The dynamic adjustment and optimization system for shield tunneling parameters has been developed and software copyright authorization has been obtained to achieve the optimal combination of shield tunneling parameters and minimize the impact of shield tunneling on surrounding structures.The innovative Y-shaped tunnel grouting technology is proposed,which has improved the grouting effect in double-layer overlap area and obtained an invention patent.
万方数据
维普
