Numerical Analysis of Pile-Anchor Support in Deep Excavation Pit with Soil-Rock Composite Strata
To explore the structural response characteristics of different pile-anchor support forms in excavation pits with soil-rock composite strata,this study focuses on a civil deep excavation project in Wuzhou City.Using PLAXIS numerical analysis software,two-dimensional numerical models were established for two support forms:strutted piles and bottom-bearing piles.The study analyzed and compared the horizontal displacement variations of the piles and the settlement patterns of the surrounding soil mass during excavation.Results show that during the excavation process,the overall deformation pattern of the strutted piles gradually transitions from a"cantilevered"mode to a"cantilevered+translational motion"mode.In contrast,the overall deformation pattern of the bottom-bearing piles changes from a"cantilevered"mode to a"bulging"mode.The settlement patterns of the soil mass surrounding the strutted piles and bottom-bearing piles exhibit an inverted triangular distribution and a trough-shaped distribution,respectively.Additionally,the settlement of strutted piles exerts influence within a small range.This research provides valuable insights for similar engineering applications in the future.
numerical simulationhorizontal displacementvertical displacement of soil mass
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