Study on Sheltering Effect of Underground Building to Horizontal Displacement of Retaining Wall of Foundation Pit

Due to the existence of underground building, the distribution of displacement field of adjacent foundation pit is obviously different from that of general foundation pit, and it is of great significance to correctly understand the sheltering effect of underground building to displacement field for determining the protection class of foundation pit while supporting design of foundation pit, and protecting the safety of metro station built near and surrounding buildings during the construction. Relying on the foundation pit project of metro station and combining the sensitivity theory through mechanism analysis, this article discovers that the sheltering effect is most obvious when the spacing between the underground building and retaining wall of foundation pit is 0.5H, and the sheltering effect can be ignored when the distance is more than 2H.