Fault　creep-slip　dislocation　and　seismic　action　can　cause　significant　damage　to　shallowly　buried　underground　structures　crossing　faults　and　the　overlying　soils.　The　laboratory　tests　for　the　segmental　double-box　underground　utility　tunnel　crossing　a　45°　reverse　fault　were　carried　out　on　a　1　∶　30　model.　The　main　parameters　of　the　double-box　underground　utility　tunnel　structure,　such　as　displacement,　strain,　and　contact　pressure　distribution,　were　measured　in　real-time.　The　progressive　failure　process　and　the　failure　mode　and　distribution　of　the　structure　were　analyzed　in-depth,　so　that　the　mechanical　response　law　and　disaster　mechanism　of　the　double-box　underground　utility　tunnel　under　the　reverse　fault　can　be　clearly　revealed.　The　results　indicate　that　flexible　joints　shall　be　more　effective　in　dissipating　the　energy　and　forced　displacement　generated　by　fault　creep-slip　dislocation　and　in　reducing　the　combined　bending-shear　actions　on　the　structure.　The　impact　of　neighboring　sections　on　the　segmental　lining　structure　is　small,　and　only　local　damage　occurs　at　the　joints　of　the　C-E　blocks,　preventing　the　overall　collapse　of　the　structure.　The　displacement　change　of　the　double-box　underground　utility　tunnel　structure　in　the　hanging　wall　area　is　noticeable.　The　internal　force　response　of　the　double-box　underground　utility　tunnel　structure　near　the　fault　is　prominent.　In　particular,　the　damage　to　the　underground　utility　tunnel　structure　in　the　range　of　70-120cm　is　severe　and　should　be　fortified　particularly.　After　completion　of　reverse　fault　dislocation,　the　double-box　underground　utility　tunnel　structure　is　vulnerable　to　tensile　and　compressive　damage.　The　main　cracking　damage　are　in　the　forms　of　cracks,　inter-ring　misalignments,　and　block　spalling.　Hence,　the　use　of　flexible　connection　measures　can　effectively　enhance　the　fracture　resistance　of　the　underground　structure　during　and　maintain　traffic　access　after　an　earthquake.　©　2024　Chinese　Society　of　Civil　Engineering.　All　rights　reserved.