This　paper　introduces　a　novel　High　Bolt-Screw　(HBS)　active　joint　that　enhances　compressive　and　tensile　support　in　deep　subway　foundation　pits,　improving　the　stability　and　safety　of　underground　structures.　The　study　provides　a　comprehensive　analysis　of　the　joint＇s　design,　including　its　working　principle,　stiffness　analysis,　parameters,　and　strength　verification.　The　HBS　joint　offers　a　unique　design　that　significantly　advances　conventional　support　systems.　A　series　of　indoor　axial　loading　tests　on　two　HBS　joints　were　conducted　to　quantify　their　load-bearing　capacity　and　develop　precise　formulas　for　yield　load　and　compression　stiffness.　The　experiments　produced　extensive　data,　including　load–displacement　curves,　load–strain　curves,　and　ultimate　failure　modes.　Numerical　simulations　yielded　results　closely　matching　the　laboratory　tests.　Parametric　studies　were　then　carried　out　to　assess　how　various　design　parameters　affect　joint　performance.　Key　findings　indicate　that　screw　diameter,　barrel　nut　height,　and　steel　tube　thickness　significantly　impact　the　HBS　joint＇s　yield　load　and　stiffness.　Through　parametric　studies　and　numerical　analysis,　precise　formulas　were　derived　to　calculate　the　joint＇s　yield　load　and　initial　compression　stiffness.　These　findings　highlight　the　HBS　joint＇s　exceptional　load-bearing　capacity　and　stiffness,　providing　valuable　insights　for　designing　advanced　support　systems　in　subway　foundation　pits.　©　2024　Elsevier　Ltd