VIP free Summary of knowledge points of Tunnel Engineering
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1. The concept of tunnels. P1 tunnel is an engineering building buried in the ground, which is a form of human use of underground space. The cavern with a sectional area of more than 2 ㎡, which is built for a certain purpose under the ground by any method according to the specified shape and size. 2. Specific classification of tunnels. P3 (1) traffic tunnel a, railway tunnel b, highway tunnel c, underwater tunnel d, subway e, shipping tunnel f, pedestrian underpass (2) hydraulic tunnel a, diversion tunnel b, tailrace tunnel c, sediment discharge tunnel (3) municipal tunnel a, water supply tunnel b, sewage tunnel c, pipeline tunnel d, line tunnel e, civil air defense tunnel (4) mine tunnel a, transportation tunnel b, water supply tunnel c Ventilation tunnel
