The　pre-support　of　large-diameter　pipe　curtains　plays　an　active　role　in　controlling　the　deformation　of　excavations,　and　the　layout　of　the　pipe　curtains　can　be　divided　into　vertical　and　horizontal　types.　Based　on　the　measured　data　of　Pinganli　metro　station　in　Beijing,　the　horizontal　pipe　curtains　with　lock　are　simplified　into　the　elastic　thin　plates,　and　the　results　of　the　elastic　plate　theory　and　the　continuous　beam　theory　are　compared　and　analyzed.　Finally,　the　influences　of　excavation　span,　height　of　overburden,　wall　thickness　of　steel　pipes　and　elastic　modulus　of　grouting　materials　are　analyzed.　The　results　show:　(1)　The　results　of　the　settlement　calculation　of　the　elastic　thin　plate　theory　are　in　good　agreement　with　the　measured　data　both　in　the　settlement　trend　and　in　the　final　settlement,　while　the　calculated　results　of　the　simply　supported　beams　and　the　elastic　foundation　beams　are　only　in　good　agreement　with　the　measured　ones　in　the　final　settlement.　(2)　Under　the　same　load　conditions,　the　maximum　bending　moment　calculated　by　the　elastic　thin　plate　theory　is　slightly　larger　than　that　of　the　simply　supported　beams,　but　this　difference　is　not　more　than　10%.　(3)　The　elastic　modulus　of　slurry　and　the　thickness　of　the　steel　pipe　wall　have　small　effects　on　the　settlement　and　bending　moment　of　the　pipe　curtains,　while　the　excavation　span　and　the　height　of　overburden　have　great　influences　on　the　settlement　and　bending　moment　of　the　pipe　curtains.　The　research　results　may　provide　a　new　way　to　simplify　pipe　curtains　into　homogeneous　elastic　thin　plates　for　calculation,　and　provide　the　theoretical　support　for　design　of　the　pipe　curtains.　©　2021,　Editorial　Office　of　Chinese　Journal　of　Geotechnical　Engineering.　All　right　reserved.