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04
2025
-
07
What are the main aspects of railway tunnel inspection
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Railway tunnel inspection mainly includes the following aspects:
Structural quality inspection
Lining quality: Testing the strength, thickness, and integrity of concrete using commonly used methods such as rebound method, ultrasonic rebound comprehensive method, and core drilling method.
Backhole detection: Geological radar or drilling methods are used to detect the cavities behind the lining.
Crack and leakage water detection: Check the leakage water situation of lining cracks, construction joints, and deformation joints, measure the water volume and temperature, and analyze the water source.
Support quality inspection
Anchor rod anchoring force detection: Verify through pull-out testing whether the anchor rod pull-out force reaches more than 90% of the design value.
Anchor rod length detection: measured using acoustic reflection method or electromagnetic induction method.
Waterproof and drainage testing
Waterproof layer testing: Verify the welding quality of waterproof boards through water injection tests.
Drainage facility inspection: Check the sedimentation and damage of drainage ditches, gutters, and intercepting ditches inside the tunnel.
Geological and Surrounding Rock Testing
Advanced geological prediction: using seismic wave reflection method and geological radar method to detect geological anomalies ahead (such as faults and caves).
Classification of surrounding rock: Determine the type of surrounding rock through geological exploration to provide a basis for construction.
Operational security testing
Fire equipment inspection: Check whether fire extinguishers, fire hydrants and other equipment are in good condition.
Power and lighting testing: Ensure the normal operation of the power supply system and lighting equipment.
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