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Deformation Detection Method of Mine Tunnel Based on Mobile Detection System
Jian Sun1,2, Haili Sun1,2, Ruofei Zhong1,2
1Beijing Advanced Innovation Center for Imaging Theory and Technology, Key Laboratory of 3D Information Acquisition and Application, MOE, College of Resource Environment and Tourism, Academy for Multidisciplinary Studies, Capital Normal University, Beijing 100048, China.
A new mobile tunnel scanning system enhances subway safety by precisely detecting tunnel clearances. This system uses integrated scanners and inertial measurement units for efficient, high-accuracy structural safety assessments.
Area of Science:
- Civil Engineering
- Geospatial Engineering
- Transportation Engineering
Background:
- Subway structure safety is crucial for reliable train operations.
- Efficient and automated tunnel clearance detection is essential for safety.
Purpose of the Study:
- To introduce a novel mobile tunnel scanning system for high-precision, automated clearance detection.
- To validate the system's accuracy and efficiency in real-world subway environments.
Main Methods:
- Integration of a scanner, inertial measurement unit (IMU), and rail car.
- Utilizing Global Navigation Satellite System (GNSS) for time synchronization and hardware calibration.
- Correction of attitude and speed using tunnel control points for enhanced absolute positioning accuracy.
Main Results:
- Achieved chord line measurement accuracy within 1 mm.
- Internal coincidence accuracy for vault clear height and closest gauge point measurements were 1.1 mm and 4.8 mm, respectively.
- System calibration accuracy was approximately 2 mm, demonstrating high precision.
Conclusions:
- The mobile tunnel scanning system offers a multi-angle approach to structural safety assessment.
- The system provides high precision and efficiency compared to existing methods.
- This technology is vital for ensuring the safe operation of subway systems.
