On　the　basis　of　the　circular　arc　sliding　model　of　the　limit　equilibrium　method,　an　axisymmetric　arc　sliding　method　(AASM)　is　proposed　to　analyze　the　basal　heave　stability　of　braced　circular　excavations.　The　proposed　method　considers　the　stiffness　of　the　enclosure　structure　and　spatial　effects.　The　AASM　was　applied　to　check　basal　heave　stability　in　a　design　example　and　provided　results　that　were　more　reasonable　than　those　obtained　using　other　methods.　The　radii　effects　in　theory　and　numerical　simulation,　and　the　enclosure　structure　stiffness　effects　on　the　basal　heave　stability　safety　factor　were　discussed.　Additionally,　the　effects　of　the　embedded　depth　on　the　basal　heave　stability　of　a　braced　circular　excavation　were　analyzed.　The　safety　factor　of　basal　heave　stability　for　a　braced　circular　excavation　will　be　larger　when　calculated　with　the　AASM　than　when　calculated　with　the　circular　arc　sliding　method,　and　the　optimized　embedded　depth　of　the　enclosure　structure　may　therefore　be　reduced　by　4　similar　to　5　m　to　lower　the　cost　of　the　enclosure　structure.