Construction method for TBM stuck in poor geology
By combining chemical grouting consolidation with controlled blasting decompression and an auxiliary jacking system, the problem of TBM getting stuck in adverse geological conditions was solved, achieving a safe, reliable, and easy extrication effect.
CN122190770APending Publication Date: 2026-06-12CHINA RAILWAY 18TH BUREAU GRP CO LTD +1
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHINA RAILWAY 18TH BUREAU GRP CO LTD
- Filing Date
- 2026-04-23
- Publication Date
- 2026-06-12
Smart Images
Figure CN122190770A_ABST
Abstract
The application discloses a TBM stuck construction method in poor geology, and comprises the following steps: 1) performing chemical grouting consolidation on the cutter head and the collapsed loose body on the top of the shield; 2) performing control blasting pressure reduction on the converging section of the surrounding rock; and 3) installing an auxiliary pushing system to assist in getting unstuck. Through the steps of chemical grouting consolidation on the collapsed loose body, control blasting pressure reduction on the converging section of the surrounding rock and installation of the auxiliary pushing system, the TBM stuck problem in the soft and broken surrounding rock or the converging stratum with high ground stress is effectively solved, and the method has the advantages of simple operation, safety and reliability and wide application range.
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