Affected　by　the　utilization　rate　of　urban　underground　space　and　the　constraints　of　the　surrounding　environment,　ultra-shallow　buried　underground　excavation　subway　stations　have　emerged,　and　ground　deformation　has　become　the　key　to　risk　control　during　the　construction　process.　Based　on　the　project　of　Pinganli　ultra-shallow　buried　subway　station　in　Beijing　Line　19,　in　order　to　control　surface　deformation,　the　intensive　construction　techniques　of　＂large-diameter　pipe　roof　method　+　PBA　(Pile-Beam-Arch)　method＂　was　proposed　and　the　support　effect　of　pipe　roof　was　analyzed.　Firstly,　the　key　construction　techniques,　including　non-overcut　pipe　jacking　technique,　jacking　accuracy　technique　and　the　joint　between　the　initial　support　and　the　large-diameter　pipe　roof　are　introduced　in　detail.　Then,　based　on　the　theory　of　elastic　thin　plate　and　beam,　the　different　theoretical　analysis　models　of　large-diameter　pipe　roof　were　established　and　verified　through　measured　data　and　numerical　results.　Further　analysis　was　conducted　on　the　deformation　response　characteristics　of　the　pipe　roof　based　on　numerical　results.　Finally,　the　influences　of　excavation　span,　overburden　depth,　steel　pipe　wall　thickness　and　steel　pipe　diameter　on　the　support　effect　of　pipe　roof　were　discussed.　The　results　show　that　the　deformation　of　ground　can　be　effectively　controlled　through　large-diameter　pipe　roof,　thereby　ensuring　the　safety　of　underground　engineering　construction　and　the　surrounding　environment.　The　＂large-diameter　pipe　roof　method　+　PBA　method＂　proposed　can　provide　a　meaningful　reference　for　similar　projects　in　complex　environmental　situations.