Suspension device for tunnels

The invention discloses a suspension device for tunnels. The suspension device mainly comprises an embedded sleeve, a toothed slot, a countersunk head screw and an elastic gasket, wherein the embedded sleeve is cast in a tunnel concrete duct piece in advance, the casting position is in the clearance part of the reinforcement cage structure of the tunnel concrete duct piece, the toothed slot and the embedded sleeve, by use of the countersunk head screw, are cooperatively connected with the inner arc surface of the tunnel concrete duct piece or in a semi-inlaid arrangement on the inner arc surface of the tunnel concrete duct piece, so as to prevent the embedded sleeve and the toothed slot from being in contact with the reinforcement cage structure of the tunnel concrete duct piece. The electrochemical corrosion on the main structure of the tunnel by stray current can be effectively lightened, the destruction on the main structure of the tunnel concrete duct piece by manual drilling and expansion bolts in the prior art can be prevented, the construction efficiency in tunnels can be increased, the proper specification of the toothed slot can be selected according to the concrete engineering requirements, the toothed slot can be conveniently replaced, the maintenance cost and the operation cost can be reduced, and the service life of the tunnel concrete duct piece can be prolonged.