Analysis on the Influence of the Comprehensive Pipe Gallery Foundation Pit Enclosure Structure Crossing Existing Shallow-buried Tunnels
In order to explore the influence of the construction of the newly-built comprehensive pipe gallery on the existing shallow-buried tunnel,based on a comprehensive pipe gallery across the existing shallow-buried tunnel engineering in Tianshui,this paper uses finite element software to establish the overall model of the comprehensive pipe gallery and the shallow-buried tunnel.The finite element calculation of various working conditions such as pile top slope section excavation,retaining pile construction,foundation pit excavation,foundation pit backfilling,and opening operation period is carried out.The calculation results show that in the whole construction process of the open-cut foundation pit in the comprehensive pipe gallery,although it will have a certain influence on the underlying shallow-buried tunnel,the structural safety control indicators are all within the scope of the specification requirements,and the degree of influence is controllable.
comprehensive pipe galleryopen-cut foundation pitenclosure structureshallow-buried tunnelnumerical simulation