Deep Foundation Pit Excavation Of A Consideration Of Seepage Flow Stress Coupling Effects On Adjacent Tunnel

There are many accidents in the excavation of deep excavation due to improper groundwater treatment.Hangzhou,the groundwater level is high,and some projects often encounter confined water.Deep excavation and precipitation,it is bound to make the seepage in the soil,causing changes in the soil stress,resulting in surface and surrounding buildings occurred settlement deformation.Based on the above questions,the following work was done:The basic concept of seepage and the theoretical equation of seepage calculation are studied,and the process of seepage stress coupling model is studied.The three-dimensional fast Lagrangian finite difference program is introduced,and the program is analyzed in detail.Coupling calculation application.Based on the deep foundation pit engineering of subway tunnel adjacent to subway tunnel of Hangzhou Rainbow Avenue,the finite difference software is used to consider the coupling effect of seepage stress during deep excavation excavation.Tunnel deformation of the impact of numerical simulation.The results of the project are analyzed and the results are compared with the numerical results of the displacement of the surrounding buildings,the deformation of the existing tunnels and the displacement of the platform and station.The results show that the coupling effect of seepage stress is in good agreement with the actual results.4,the excavation of the deep foundation pit excavation,seepage stress should be taken into account,for future similar projects can provide a reference.At present,in the area where the groundwater is relatively developed in riverside and other areas,the effect of seepage and stress coupling is rarely considered in the excavation of deep excavation.However,a large number of practical works show that the coupling effect of seepage and stress is Engineering practice,can effectively avoid the occurrence of engineering accidents.The results show that the coupling effect of seepage and stress should be considered in the development of groundwater system in Hangzhou,and it can be used as a reference for considering the effect of seepage and stress coupling on similar engineering.