Shallow-buried tunnel portal upward slope waterproof and drainage structure

The utility model discloses a shallow-buried tunnel portal upward slope waterproof and drainage structure which is characterized in that a cover arch is constructed on a tunnel portal, a down-the-hole drill is used for drilling, a long pipe shed is installed, the long pipe shed is grouted to form a'bearing arch ', a core soil reserving method is adopted for excavation, primary support is carried out to form a tunnel outline, and the core soil reserving method is adopted for excavation. Steel arches, reinforcing meshes and anchor rods are installed, concrete spraying sealing is conducted in time, primary support is formed, the tunnel anchor rods are distributed in a circular array mode, long piles are driven on the two sides outside the outline of the tunnel at the top of the tunnel portal upward slope after soil filling and compaction are conducted on the small collapse cavity, and short piles are evenly driven between the long piles; reinforced concrete protective shells with 1%-2% of cross slopes are constr