To　explore　the　construction　process　and　application　effect　of　steel　corrugated　plate-mold　bag　concrete　support　structure　in　circular　shafts,　the　influence　patterns　of　pressurized　drainage　on　the　strength　of　mold　bag　concrete　at　different　curing　ages　are　examined　through　indoor　uniaxial　compression　tests.　Then,　a　three-dimensional　finite　element　numerical　simulation　is　performed　to　facilitate　the　second　phase　of　the　field　process　test　of　the　steel　corrugated　plate-mold　bag　concrete　support　structure,　which　validates　its　feasibility　and　application　effect.　The　results　demonstrate　the　following:　(1)　The　pressurized　drainage　process　substantially　enhances　the　early　compressive　strength　of　the　mold　bag　concrete.　The　lightweight　mold　bag　exhibits　a　better　effect　on　increasing　the　compressive　strength　of　the　mold　bag　concrete　during　the　pressurized　drainage　process.　(2)　The　mold　bag　concrete　effectively　fills　the　gap　between　the　corrugated　steel　plate　and　excavation　face,　and　the　mold　bag　discharges　the　gas　and　water　of　concrete　and　thus　shortens　the　solidification　and　shaping　period.　(3)　The　concrete-pouring　process　slightly　affects　the　corrugated　steel　plate　force,　and　every　corrugated　steel　member　is　in　a　uniform　stress　state　under　working　conditions.　(4)　A　lightweight　mold　bag　of　polyester　filament　spunbonded　needle　punched　nonwoven　geotextile　is　recommended　for　similar　projects.　©　2024　Editorial　Office　of　Tunnel　Construction.　All　rights　reserved.