In　this　article,　the　mechanical　properties　of　tunnel　joints　with　curved　bolts　are　studied　and　analyzed　using　the　research　methods　of　full-scale　testing　and　finite　element　numerical　simulation.　First,　the　experiment　results　were　analyzed　to　find　out　the　development　law　of　stress　and　strain　of　concrete　in　each　part　of　the　tunnel　fragment　when　bearing.　The　damage　process　of　the　joint　of　the　tunnel　fragment　was　described　in　stages,　and　the　characteristic　load　value　that　can　reflect　the　initial　bearing　capacity　in　each　stage　was　proposed.　Afterward,　using　the　ABAQUS　three-dimensional　(3D)　finite　element　numerical　modeling　software,　a　numerical　model　corresponding　to　the　experiment　was　established.　The　mid-span　deflection　was　used　to　observe　the　change　in　loading　and　the　destruction　of　each　stage,　comparing　it　to　the　proposed　form　to　verify　the　reasonableness　of　the　numerical　model.　Finally,　the　numerical　models　were　used　to　analyze　the　change　in　material　parameters　and　external　loads　from　two　aspects.　It　is　concluded　that　the　damage　process　of　tunnel　joints　under　curved　bolt　connection　can　be　divided　into　concrete　elasticity　stage,　inner　arc　cracking　stage,　overall　joint　damage　stage,　and　ultimate　joint　damage　stage,　and　the　initial　load　of　the　adjacent　stages　is　defined　as　the　characteristic　load　value.　After　concrete　cracking　occurs,　the　bolts　start　to　become　the　main　load-bearing　components,　and　the　bolt　stress　grows　rapidly　in　stage　II.　The　strain　development　of　the　concrete　on　the　outer　arc　is　greater　than　the　strain　value　of　the　concrete　on　the　side　due　to　mutual　contact　and　extrusion.　The　parameters　were　changed　for　material　properties,　and　it　was　found　that　increasing　the　concrete　strength　and　bolt　strength　could　improve　the　shield　fragment　joint　bearing　performance.　The　optimal　effect　of　improving　the　mechanical　properties　of　the　shield　fragment　joint　would　be　obtained　when　the　concrete　strength　grade　is　C60,　and　the　bolt　strength　grade　is　8.8.　Increasing　the　size　of　the　axial　force　and　bolt　preload　has　the　most　obvious　effect　on　the　load-carrying　capacity　in　the　initial　elastic　phase.　This　can　reduce　the　joint　angle　and　thus　improve　joint　stiffness.　Meanwhile,　increasing　the　axial　force　has　a　greater　effect　on　the　performance　of　the　tunnel　joint　than　the　bolt　preload.