Waterproof board and tunnel supporting system

The utility model provides a waterproof plate and a tunnel supporting system. The waterproof plate comprises a first sub waterproof plate and a second sub waterproof plate which are oppositely arranged, and more than two transverse drainage guide walls arranged between the first sub waterproof plate and the second sub waterproof plate; a main drainage groove is defined by every two adjacent transverse drainage guiding walls, the first waterproof sub-plate and the second waterproof sub-plate. A weak connecting part is arranged on the transverse drainage guiding wall, the thickness of the weak connecting part on the transverse drainage guiding wall is minimum, and the weak connecting part extends in the length direction of the transverse drainage guiding wall. The waterproof plate can still keep the waterproof function when concrete cracks expand or relative displacement occurs between a primary supporting face and a secondary lining. 本实用新型提供一种防水板和隧道支护系统。防水板包括相对设置的第一子防水板和第二子防水板，以及设置在第一子防水板和第二子防水板之间的两个以上横向导排壁；相邻