The invention relates to a tunnel lining self waterproof drainage
system, which comprises a surrounding rock bearing arch, a cast-in-place
cement main waterproof layer, a pre-cast
cement arch sheet layer and longitudinal drainage channels. Arch sheet layer construction gaps and cast-in-place
cement main waterproof layer construction gaps are interlaced. The tunnel lining self waterproof drainage
system is characterized in that movable drainage grooves are fixedly arranged below the pre-cast cement arch sheet layer of centralized
bursting water seepage points of loose surrounding rocks, and form arch sheet drainage spaces with an inwards
concave surface of the pre-cast cement arch sheet layer, the parallel drainage spaces distributed along the section of a tunnel form a movable drainage channel, the longitudinal drainage channels are communicated and are arranged on two sides of the movable drainage channel and the pavement of the tunnel, pre-embedded water guiding pipes are arranged at the centralized
bursting water seepage points, a water outlet end of each pre-embedded water guiding
pipe is arranged on the inwards
concave surface of the pre-cast cement arch sheet layer, and pre-embedded grouting pipes are arranged outside the pre-embedded water guiding pipes. The invention completely solves stubborn problems of the tunnel on
cracking, seeping,
frost heaving,
ponding or freezing and the like on the premise of not arranging an interlayer waterproof layer and a hidden seepage water blind
pipe drainage
system, and the tunnel lining self waterproof drainage system disclosed by the invention has a simple structure and is convenient to construct.