The utility model provides a sinking-reducing deviation-rectifying
system for the grouting of a bag of a shield tunnel, which avoids the problems of
grout runout and
grout leakage in the traditional grouting method and ensures the high efficiency and reliability of grouting. The grouting sleeve is mounted in a tunnel structure; in the soil layer
cutting stage, the rotary spraying
drill rod is arranged in the grouting sleeve, an outlet of the rotary spraying
drill rod is located in a soil body outside the tunnel structure,
cutting materials are injected through an inlet of the rotary spraying
drill rod, the
cutting materials are sprayed out through the outlet of the rotary spraying drill rod, the soil layer of the tunnel structure is
cut, and a soil layer cutting body is formed. Then, the rotary spraying drill rod is taken out of the grouting casing
pipe; the bag grouting mechanism comprises a grouting guide
pipe, a grouting floral
pipe and a bag; the bag wraps and is fixed outside the grouting floral tube, and the grouting
guide tube is connected with the grouting floral tube; in the grouting reinforcement stage, the bag is arranged in the soil layer cutting body, the grouting guide pipe is arranged in the grouting sleeve, grouting is conducted on the bag through the grouting guide pipe, and the bag is unfolded to form a grouting body.