The application relates to the field of municipal roads and
water supply and drainage systems, and discloses an assembled drainage device for municipal roads, which comprises a
drainage ditch body, a support frame, a drainage cover plate, a collecting frame, a connecting rod trigger mechanism and a limiting warning block. The support frame under the drainage cover plate is in contact with the
drainage ditch body but is not connected with the
drainage ditch body, and the two are in a decoupled state capable of relatively sliding. When the ground base is settled, the support frame is overlapped on the
road surface and does not sink with the drainage
ditch body. The drainage
ditch body sinks and pulls down the connecting rod trigger mechanism, so that the inside of the connecting rod trigger mechanism is forced to rotate, and then the limiting warning block is pushed upward to
expose the warning piece on the
road surface, early visual early warning in a pure mechanical mode is realized, in addition, the inner wall of a plug-in groove at the plug-in joint of adjacent drainage
ditch bodies is provided with an
inflatable sealing ring made of water-swelling
rubber material. When a gap is generated due to settlement and pulling, the
inflatable sealing ring is self-adaptively filled and sealed by water swelling. The application effectively solves the technical defects that the existing rigid device cannot give early warning of settlement and joint
water leakage.