Weak surrounding rock highway tunnel's supporting construction

The utility model discloses a weak surrounding rock highway tunnel's supporting construction, including supporting construction, supporting construction surrounds the tunnel, and fixed surface installs the secondary lining that tops bar on the tunnel, and fixed surface installs the secondary lining that gets out of a predicament or an embarrassing situation under the tunnel, the secondary lining upper surface of topping bar is provided with wire net I, and fixed surface installs cover arch on wire net I, the cover arch upper surface is provided with wire net II, is provided with waterproof layer I at II upsides of wire net, waterproof layer I is gone up fixed surface and is installed the buffer layer, is provided with waterproof layer II at the buffer layer upside, waterproof layer II is gone up fixed surface and is installed muddy dirt bed, this weak surrounding rock highway tunnel's supporting construction, to weak surrounding rock highway tunnel easily collapse, infiltration and yielding characteristics, a