Analysis And Research On Seabed Evolution And Erosion And Deposition Of Wide Shallow Channel In Coastal Area

The subsea tunnel is an effective way to solve the traffic problems between the cross strait and the bay.Compared with the cross sea bridge,it has the obvious advantage of having the least impact on the surrounding environment,the route and the channel,but also because under the seabed,the working conditions are relatively complex and there are many influencing factors.In this paper,numerical simulation and physical model test are used to study the influence of seabed evolution and erosion and deposition on the subsea tunnel.Based on a large number of literature,the influence of different tidal conditions,regional dredging and channel dredging,and the existence of surrounding marine engineering on the evolution of seabed and the change of erosion and deposition is explained.Based on the actual case,this paper analyzes the characteristics of tide,wave,tidal current and suspended sediment in the wide and shallow water channel area according to the natural geographical characteristics of climate,topography and engineering geology in the study area.Through theoretical analysis and physical model test,this paper studies the characteristics of regional shoreline change,cross-section erosion and deposition change and seabed evolution,and evaluates the influence of seabed erosion and deposition change on subsea tunnel coverage The effect of layer changes.It provides technical support and theoretical basis for the design and application of this kind of engineering.