The　permanent　large　ground　deformation　caused　by　strong　earthquake　is　one　of　the　main　threats　leading　to　the　damage　of　buried　water　supply　pipeline.　Based　on　the　idea　of　chain　pipe　structure,　this　study　proposes　a　new　type　of　seismic　joint　on　the　traditional　socketed　joint,　which　allows　a　certain　deformation　of　the　joint　in　the　axial　direction,　and　when　the　deformation　of　the　joint　reaches　the　limit　state,　the　joint　occurs　self-locking　phenomenon　and　can　provide　a　certain　axial　load-bearing　capacity,　so　that　it　can　drive　the　adjacent　pip　movement　to　offset　the　deformation　caused　by　fault　movement.　In　order　to　study　the　strain　capacity　of　the　new　seismic　joint　when　subjected　to　large　ground　deformation,　this　study　conducted　relevant　tests　and　established　a　two-dimensional　finite　element　model,　while　the　numerical　results　were　compared　with　relevant　full-scale　tests　for　verification.　In　this　study,　the　mechanical　response　of　the　socketed　pipe　under　fault　movement　before　and　after　reinforcement　was　investigated,　using　soil　compaction　conditions　and　fault　crossing　pipe　location　as　key　variables.　The　results　show　that:　the　proposed　seismic　joint　can　effectively　improve　the　resistance　of　the　pipe　to　large　ground　deformation,　and　improving　the　axial　pullout　resistance　of　the　joint　is　the　key　to　improve　the　resistance　of　the　pipe　to　fault　movement;　the　loose　sandy　soil　stratum　is　not　conducive　to　ensuring　the　confinement　of　the　cross-fault　socketed　pipe;　different　locations　of　the　fault　crossing　the　pipeline　will　cause　different　joint　deformation　patterns;　the　corner　limits　of　the　pipe　joint　in　the　domestic　code　are　too　conservative,　which　is　not　conducive　to　the　strengthening　of　the　cross-fault　socketed　pipe.　It　is　not　conducive　to　the　reasonable　judgment　of　the　safety　performance　of　cross-fault　socketed　pipe.　©　2024　Science　Press.　All　rights　reserved.