Aiming　at　the　problem　of　functional　integrity　of　underground　utility　tunnel　disturbed　by　adjacent　engineering　construction,　Based　on　the　assumption　that　rigid　body　rotation　occurs　in　the　section　near　the　joint　of　a　utility　tunnel,　the　geometric　relationship　is　established　between　the　rotation　of　the　utility　tunnel　joint　and　the　detail　geometries　of　the　utility　tunnel　considering　the　water-proof　failure　at　the　joint,　and　the　joint　rotation　limits　is　preliminarily　investigated　for　the　utility　tunnels　with　different　cross-sectional　geometries　corresponding　to　the　water-proof　failure.　Based　on　the　ultimate　tensile　and　compressive　strain　of　the　internal　pipelines　of　a　underground　utility　tunnel,　the　joint　rotation　limits　are　also　presented　for　the　utility　tunnel　corresponding　to　the　failure　of　internal　pipelines　with　different　diameters.　The　analysis　results　show　that:　the　joint　rotation　limit　corresponding　to　the　water-proof　failure　of　the　utility　tunnel　is　closely　related　to　the　configuration　of　the　water　proof　material　at　the　joint　and　the　cross-sectional　geometries　of　the　utility　tunnel;　the　water-proof　failure　of　the　utility　tunnel　joint　plays　a　critical　rule　to　the　functional　integrity　of　the　utility　tunnel　when　the　width　of　the　utility　tunnel　is　less　than　10　m　and　when　the　pipeline　is　smaller　than　the　nominal　diameter　of　DN500.　Otherwise,　when　the　width　of　the　utility　tunnel　is　more　than　10　m　and　the　pipeline　is　larger　than　DN500,　the　failure　of　internal　pipelines　occurs　before　the　water-proof　failure　of　the　utility　tunnel　joint.　Considering　the　two　failure　modes　of　water-proof　failure　and　internal　pipelines　failure　in　the　utility　tunnel,　the　limited　value　of　the　joint　rotation　can　provides　a　technical　reference　for　the　functional　integrity　and　safety　design　of　the　utility　tunnels.　©　2021,　Engineering　Mechanics　Press.　All　right　reserved.