一种超深大跨隧道溶洞处治施工方法及复合加固系统
By employing methods such as backfilling and compaction, combined anti-settlement foundations, composite initial support, and multi-level flexible protection during tunnel construction, the risks of foundation settlement and arch rockfall in karst caves of ultra-deep, large-span tunnels have been resolved, achieving construction safety and long-term stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CCCC SECOND HARBOR ENGINEERING CO LTD
- Filing Date
- 2026-04-22
- Publication Date
- 2026-07-17
AI Technical Summary
In tunnel construction, especially in limestone areas, when encountering large karst caves with a depth exceeding 100m and a dome more than 30m higher than the tunnel top, existing technologies lack effective treatment methods and cannot simultaneously control the risk of falling rocks from the dome and the risk of foundation settlement, making it difficult to guarantee construction safety and long-term stability.
A construction method for treating karst caves in ultra-deep, large-span tunnels is adopted, which includes backfilling and compaction to form the backfill body at the bottom of the tunnel, construction of a combined anti-settlement foundation, a composite initial support system and a multi-level flexible protection system, and combined with a counter-pressure embankment and an internal drainage system to form a systematic reinforcement structure from the foundation to the arch.
It effectively controlled the risks of uneven settlement of the foundation and falling rocks at the arch, ensuring construction safety, improving the long-term stability and construction efficiency of the tunnel, and providing convenient maintenance access and internal drainage solutions.
Smart Images
Figure CN122407202A_ABST