A shield tunnel phased grouting system and method during operation period

By using a phased grouting system with intelligent control units and dynamic grout formulation, the problem of uneven settlement of shield tunnel segments during operation was solved, achieving precise grout filling and structural stability, thus ensuring the safe operation of the subway tunnel.

CN121382234BActive Publication Date: 2026-07-24BEIJING URBAN RAIL TRANSIT CONSTRUCTION ENGINEERING CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
BEIJING URBAN RAIL TRANSIT CONSTRUCTION ENGINEERING CO LTD
Filing Date
2025-11-11
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

The uneven settlement of shield tunnel segments during operation, especially when the voids behind the segment walls are not fully filled and the grout does not solidify sufficiently, can lead to structural deformation and operational safety hazards.

Method used

A staged grouting system is adopted, including a positioning unit, a channel control unit, a grouting pressure unit, and an intelligent control unit. By monitoring the grouting position and pressure data in real time, the grout formula and grouting stage are dynamically adjusted to achieve rapid setting and strength enhancement of the grout, accurately fill the voids behind the pipe segment wall, and correct uneven settlement.

Benefits of technology

It significantly improves the long-term strength and durability of the stone mass, avoids grout diffusion and support failure, and ensures the structural stability and safety of the subway tunnel during operation.

✦ Generated by Eureka AI based on patent content.

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  • Figure CN121382234B_ABST
    Figure CN121382234B_ABST
Patent Text Reader

Abstract

The application relates to a shield tunnel staged grouting system and method in an operation period, which comprises a positioning unit, a passage control unit, a grouting pressure unit and an intelligent control unit. The positioning unit is used for collecting positioning data of a grouting position; the passage control unit is used for adjusting the opening and closing states of valves of a plurality of pipelines based on a passage control scheme sent by the intelligent control unit, so as to adjust the formula of slurry; the grouting pressure unit is used for collecting grouting pressure data in the grouting process; and the intelligent control unit is configured to: extract the distance between the current position to be grouted and the grouting equipment based on the positioning data; determine whether the passage control scheme is changed based on the distance between the position to be grouted and the grouting equipment; and retrieve the passage control scheme corresponding to the grouting stage from a preset mapping table based on the grouting stage and send the passage control scheme to the passage control unit.
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