Grouting reinforcement system for tunnel underneath passing through existing shield stratum based on WSS construction method

The utility model discloses a grouting reinforcement system for a tunnel to underpass an existing shield stratum based on a WSS construction method, and relates to the field of iron tunnel proximity construction, the grouting reinforcement system comprises a grouting system, a newly-built tunnel inner drilling grouting system and an earth surface drilling grouting system, the newly-built tunnel inner drilling grouting system and the earth surface drilling grouting system are used for realizing drilling grouting; the grouting system comprises a guniting mixer and a grouting pipe, one end of the grouting pipe is connected with the guniting mixer, the other end of the grouting pipe can be arranged in a hole drilled by the newly-built tunnel inner drilling grouting system and the earth surface drilling grouting system in an extending mode, and a grouting hole is formed in the end, arranged in the drilled hole, of the grouting pipe. A first liquid feeding pipe and a second liquid feeding pipe which are used for en