Depressurization drainage system suitable for highway water-rich tunnel

The utility model discloses a depressurization drainage system suitable for a road water-rich tunnel, which comprises a transverse reserved cutting groove arranged between a pavement structure and an inverted arch filling layer and used for collecting seepage water on two sides of a cable trough and a pavement base layer, and an arch bottom vertical seepage well arranged at the arch bottom of an inverted arch and used for collecting pressure-bearing accumulated water at the arch bottom, the permeable blind pipe is used for introducing accumulated water in the reserved cutting groove and the arch bottom vertical seepage well into the central drainage ditch; the problems of pavement cracking, softening and sinking caused by water leakage of later construction joints of the tunnel are solved, the construction procedure is simplified, the operation risk is reduced, the later disease treatment cost is saved, and the overall quality of tunnel engineering is improved. 本实用新型公开了一种适用于公路富水隧道的降压排水系统，包括设置于路面结构与仰拱填充层之间的用于收