Based on a high-speed railway tunnel project,this paper monitored the surface settlement,vertical and horizontal displacement of slope top and deep horizontal displacement during the excavation of foundation pit,and analyzed the monitoring results.The research results show that the surface settlement curve is concave,and the surface settlement increases with the increase of the depth of the foundation pit;the variation trend of vertical settlement at the top of the slope is similar at different positions;the horizontal displacement at the top of the slope shows a periodic trend of first increasing and then decreasing with time;the deep horizontal displacement presents the shape of"large in the middle and small at both ends"with the excavation depth.The research results have certain guiding significance for similar high-speed railway tunnel foundation pit engineering.
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