一种抑制冻胀影响对接盾构的开敞式冻结孔设计方法
By adopting an open-type freezing hole design during the shield tunneling docking process, and utilizing the monitoring and pressure relief technology of the central ring pressure relief pipe, a uniform frozen wall is formed, which solves the problems of uneven frozen soil strength and frost heave, improves construction safety and efficiency, and reduces costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CCCC TUNNEL ENG CO LTD
- Filing Date
- 2025-12-25
- Publication Date
- 2026-07-17
AI Technical Summary
During the underground docking process of the shield tunnel, the existing freezing pipes and freezing mode result in uneven frozen soil strength, and the frost heave cannot be released, which affects the safety of the shield structure and construction efficiency. In addition, the freezing time is extended, increasing the project cost.
An open-type freezing hole design method is adopted. By arranging outer ring freezing holes, middle ring pressure relief pipes and inner ring freezing holes on the outside of the shield, the middle ring pressure relief pipes are used to monitor the frost heave pressure and actively relieve pressure. Combined with liquid nitrogen freezing, a uniform frozen wall is formed to absorb the effects of frost heave.
Without extending the construction time, the quality and uniformity of the frozen wall were improved, the impact of frost heave on the tunnel boring machine structure was reduced, construction safety and efficiency were ensured, and project costs were reduced.
Smart Images
Figure CN121683139B_ABST
Abstract
Citation Information
Patent Citations
Method for freezing detection and clearing of underground obstacles
CN111058850A