Research on the impact of nearby construction on existing metro tunnel structural deformation based on extended IFC model
With the development of informatization in civil engineering industry,the application of BIM technology in civil engineering has been expanding.To solve the issue that it is difficult to accurately reflect the impact of construction loading and unloading on existing buildings(structures)in the past adjacent construction process,this article relies on a nearby construction project adjacent to an existing metro tunnel,firstly,it compares diverse IFC extension mechanisms and extends the IFC attribute set's operating condition information within the BIM model.Then,by employing numerical simulations,the loading and unloading effects of nearby construction are modeled,establishing a quantitative relationship between IFC entity data and the deformation values of the metro tunnel caused by construction loading and unloading.Finally,based on the geometric data and the expanded attribute information in the IFC model,an information method that can visually represent the impact of construction loading and unloading on existing metro lines is proposed,and correlation analysis has been conducted between the calculated impact values and the actual vertical deformation values of metro tunnels during the construction process.The research findings show that the IFC model property set extension method can effectively supplement work condition information,and the impact of nearby construction loading and unloading on existing metro structures approximates an exponential function relationship.The correlation analysis proves that the proposed method for visually representing the impact of construction loading and unloading on existing metro structures shows a good correlation with actual monitoring values and could fully reflect the impact of construction loading and unloading on nearby metro line displacements.
metroBIMIFC extension modelnumerical simulationadjacent constructionloading and unloadingtunnel structural deformation
万方数据
维普
