The　promotion　of　precast　piers　in　high-intensity　zones　is　still　confronted　with　problems　such　as　the　weak　integrity　of　connection　parts　and　insufficient　seismic　resistance.　To　address　these　challenges,　a　novel　connection　combining　grouted　corrugated　pipe　and　socket　connection　for　precast　double-column　piers　was　proposed,　and　the　precast　piers　were　connected　to　the　bearing　platform　by　employing　Ultra-high　Performance　Concrete　(UHPC)　grouting.　Additionally,　the　plastic　hinge　zones　of　precast　piers　were　cast　with　Engineered　Cementitious　Composite　(ECC).　Quasi-static　tests　of　three　double-column　piers　using　combined　connection,　single　socket　connection,　and　cast-in-place　connection,　respectively,　were　conducted.　The　seismic　performance　of　three　specimens　was　analyzed　in　terms　of　hysteretic　performance,　stiffness　degradation,　residual　displacement,　energy　dissipation　and　ductility,　as　well　as　the　numerical　analysis　models　of　three　specimens　were　developed,　validated　and　utilized　for　parameter　expansion　analysis.　The　results　show　that　the　seismic　performance　of　the　specimens　with　combined　grouted　corrugated　pipe　and　socket　connection　is　generally　superior　to　that　of　the　other　two　specimens.　The　seismic　performance　of　the　combined　connection　specimen　is　enhanced　by　increasing　the　socket　depth　and　reinforcement　ratio.　Moreover,　the　possibility　of　failure　of　the　bearing　platform　is　reduced　by　increasing　the　socket　depth,　UHPC　joint　strength,　and　width.　A　more　reliable　whole　can　be　formed　by　employing　the　U-shaped　steel　reinforcement　among　the　bearing　platform,　UHPC　joint　and　steel　reinforcement　skeleton.　A　recommended　socket　depth　for　combined　connection　specimen　was　given　for　practical　engineering.　©　2025　Institution　of　Structural　Engineers