Analysis On Influence Of Shallow-buried And Undercut Tunnel On Surrounding Environment In Combined Strata Of Earth And Rock In Jinan City

The current state of urban traffic congestion is becoming more and more severe.The construction of underground tunnels in cities has become an effective way to solve the problem of urban traffic congestion.Because in the process of underground construction of urban roads,it is not only necessary to pay attention to the stability of the tunnel,but also to pay more attention to the surrounding environment of the surrounding soil,the pipeline below the road,and the buildings on the ground during the excavation of different layers of the tunnel.influences.In the simulation analysis and research,the results obtained from the analysis of the complexity of the surrounding environment of urban roads during construction can give relatively rigorous design solutions to ensure the quality of the project.Based on the urban tunnel project of Yuhan Road in Jinan City,this paper focuses on the typical combination of earth and rock in the region,and compares and analyzes the effects of tunnel excavation on surrounding buildings,road retaining walls,fill roads and pipelines.The use of Midas/GTS software for numerical simulation can provide reference for the reinforcement and protection of buildings,road retaining walls,fill roads and pipelines.The following work has mainly been done on the research of this project.First,the Midas/GTS software was used to create a calculation model for a shallow buried tunnel under a typical combined formation of earth and rock.This model considers the nonlinearity of soil and rock,and the excavation and support of tunnels.Construction process.Secondly,the impact of different soil thicknesses on the surrounding buildings,road retaining walls,and overlying fill-side road pipelines during the tunnel excavation of combined soil-rock stratawas considered.The results of the final study showed that when the thickness of the soil layer is thin,there is no significant subsidence and tilting of the surrounding buildings and road retaining wall settlement.With the increase of soil thickness,the subsidence of surrounding buildings and road retaining walls is obvious and the inclination is increased.When the thickness of the soil layer is too large,the surrounding buildings and road retaining walls are mainly submerged,and there is no significant tilt.Overburdened road pipelines will gradually increase with the deepening of soil settlement.