Construction method for shield in-ground butt joint in strong water-permeable sand stratum

The invention belongs to the technical field of shield tunnel engineering, and particularly relates to a construction method for shield in-ground butt joint in a strong permeable sand stratum. Comprising the following steps that a preceding shield tunneling machine is shut down for pressure maintaining and peripheral stratum grouting reinforcement, a following shield tunneling machine is subjected to advanced grouting reinforcement, the posture of the following shield tunneling machine is adjusted, and the butt joint position of the two shield tunneling machines is subjected to freezing reinforcement in a soil layer subjected to grouting reinforcement. According to the construction method, the problems that in the strong permeable sand stratum, a single construction method is used for stratum reinforcement, the requirement for shield in-ground butt joint is difficult to meet, and the shield posture in the strong permeable sand stratum is difficult to adjust are solved, the stratum reinforcement ...