In　order　to　study　the　mechanisms　of　soil　plugging　effect　inside　sleeve　of　cast-in-place　piles　driven　by　vibratory　hammers,　finite　element　and　infinite　element　coupling　model　were　established　by　using　the　commercial　code　ABAQUS,　to　simulate　the　full　penetration　process　of　the　sleeve　driven　by　using　high　frequency　vibratory　hammers.　The　results　indicated　that　the　soil　plug　inside　the　sleeve　forms　soil　arch　during　vibratory　sleeve　driving,　which　leads　to　the　obvious　increase　of　inner　frictional　resistance.　The　soil　plug　of　this　section　withstands　the　major　part　of　the　inner　frictional　resistance.　The　soil　strength　and　cohesive　force　decrease　during　vibratory　sleeve　driving,　which　is　induced　by　cyclic　shearing　action　in　the　shear　interface.　As　a　result,　the　soil　plug　inside　sleeve　is　incompletely　plugged　mode　and　the　penetration　resistance　is　less　than　that　of　other　installation　methods.　The　inner　frictional　resistance　decreases　with　the　increase　of　vibration　frequency　and　sleeve　diameter.　The　inner　frictional　resistance　of　sand　is　larger　than　that　of　clay,　and　decreases　with　the　increase　of　density.　The　distributions　of　soil　plug　resistance　were　also　studied,　and　a　simplified　formula　was　obtained　to　calculate　the　soil　plug　resistance.　©　2016,　Editorial　Department　of　Journal　of　Sichuan　University　(Engineering　Science　Edition).　All　right　reserved.