In　the　context　of　increasing　environmental　awareness　and　the　demand　for　sustainable　construction　practices,　the　use　of　recyclable　materials　in　civil　engineering　projects　has　gained　significant　attention.　This　study　focuses　on　the　bearing　characteristics　and　deformation　behavior　of　recyclable　steel-pipe　piles　during　the　excavation　of　foundation　pits.　Field　experiments　and　numerical　simulations　were　conducted　to　comprehensively　analyze　the　stress　characteristics　and　surface　settlement　patterns　behind　the　piles.　The　results　reveal　critical　insights　into　the　interaction　between　the　steel-pipe　piles　and　the　surrounding　soil,　providing　a　detailed　understanding　of　the　stress　distribution　and　deformation　mechanisms.　An　empirical　method　for　calculating　the　surface　settlement　value,　induced　by　foundation　pit　excavation　under　the　support　of　steel-pipe　slope　protection　piles,　has　been　proposed.　This　method　improves　the　accuracy　of　settlement　predictions　and　enhances　the　reliability　of　foundation　pit　design.