Rich water sandy gravel stratum slurry shield tunnelling is protected footpath and is made up sword

The utility model relates to a shield constructs construction field, specifically is a rich water sandy gravel stratum slurry shield tunnelling is protected footpath and is made up sword. It is frequent to have solved the tool changing of current rich water sandy gravel stratum slurry shield tunnelling, have a big risk, the degree of difficulty is big, the problem low with the work efficiency with high costs, a rich water sandy gravel stratum slurry shield tunnelling is protected footpath and is made up sword, including the shell blade disc, be equipped with the owner on the shell blade disc, vice width of cloth strip, highly different front blade disc shell sword of symmetrical bilayer is gone up to main width of cloth strip, dispose peripheral hobbing cutter on the inclined plane of the main width of cloth strip of shell blade disc, peripheral hobbing cutter outside welding has the serrated knife, the serrated knife both sides are equipped with wear -resisting protection piece. The utility model discloses t