Research on Settlement Control Technology of Foundation for Ultra-Wide River Immersed Tube Tunnel
Based on the Shunde District Lungui Road immersed tunnel project,the settlement control technology for ultra-wide river immersed tube tunnels is studied.The entire route is divided into 14 calculation sections,and 2D numerical models are established to analyze the settlement and foundation stiffness for natural foundation and strengthened foundation during construction and operation whole process.The analysis results indicate that the cement mixing pile reinforcement can effectively control settlement and uneven settlement.In the area with thick silt layer,the foundation stiffness increases by more than 50%and the settlement value decreases by 40%after reinforcement.In the foundation with uneven strength,the stiffness of the foundation is symmetrically distributed after reinforcement,and the uneven settlement value decreases by 90%.The settlement value,non-uniform settlement and foundation stiffness are improved effectively after the whole foundation is strengthened,especially in the area with thick silt layer,the abrupt change is flattened,and the large longitudinal bending and torsional deformation of pipe joints are avoided.
万方数据
维普
