Dynamic Performance and Damage Assessment of a Shallow Buried Tunnel under Internal Explosion

•The post-blast shallow buried tunnel arch was obtained via field blast test.•The static load test was used to get the residual bearing capacity of the specimen.•A high-fidelity finite element model was established to verify the test results.•The residual bearing capacity was used as an index for damage assessment.•The damage assessment on tunnel arch under varied internal explosions was conducted.