The　unevenness　of　ring　faces　(or　the　local　gaps　due　to　gaskets)　is　inevitable　during　the　assembling　of　lining　segments,　which　could　cause　the　cracking　or　damage　of　segments　and　might　endanger　the　safety　of　lining　structure　in　severe　cases.　Based　on　the　shear　resistance　prototype　test　of　lining　segment,　the　refined　numerical　simulation　for　the　P2-typed　standard　segment　was　established　upon　the　ABAQUS　numerical　platform.　The　jacking　plates　were　placed　on　the　top　of　segment,　the　gaskets　are　placed　at　the　bottom　of　segment,　and　the　right　gasket　was　left　empty　to　form　a　local　gap.　The　uniform　load　was　gradually　applied　upon　the　top　of　segment　through　jacking　plates.　The　mechanical　responses　of　the　segment　with　local　void　condition　were　analyzed　under　the　gradual　action　of　jacking　force.　The　cracking　process　and　the　shearing　capacity　of　segment　with　uneven　ring　face　condition　were　well　focused　on.　The　simulation　results　show　that　the　1st　crack　appears　on　the　upper　part　of　segment　inner　surface　with　2　mm　under　the　jacking　force　of　850　kN.　When　the　jacking　force　increases　to　1　120　kN,　the　vertical　displacement　of　the　segment　bottom　reaches　6　mm.　Another　two　new　cracks　appear　on　the　segment　inner　surface,　and　the　1st　crack　further　expands　to　the　outer　surface　and　develops　into　the　penetrating　cracks.　The　cracking　process　of　the　segment　is　described　sequentially　as　inner　surface　→　upper　ring　surface　→　outer　surface.　Considering　the　potential　risk　of　leakage　of　water　caused　by　penetrating　cracks,　the　shear　capacity　(yield　load)　of　P2-typed　standard　segment　was　determined　to　be　approximately　1　120　kN.　Comparing　the　numerical　simulation　results　with　the　prototype　test,　the　cracking　expansion,　the　distribution　pattern　and　the　shearing　capacity　obtained　from　both　two　means　were　almost　consistent,　which　implies　the　reliability　of　numerical　simulation.　These　results　can　provide　reference　for　the　design　and　construction　of　shield　tunnel.　©　2024,　Central　South　University　Press.　All　rights　reserved.