Tunnel-mode Surveys
Purpose: Tunnel-mode surveys are specialized for assessing the structural integrity of large-diameter tunnels and identifying features like drill holes that intersect the tunnel. This mode is essential for infrastructure projects, including outfall systems, where regular monitoring and inspection of tunnel walls are critical to ensure safety and functionality.
Applications:
Structural Integrity Checks: Tunnel-mode surveys detect fractures, voids, and other structural weaknesses, providing essential data to assess tunnel stability.
Drill Hole Location: This mode helps map drill holes intersecting the tunnel, a common requirement for projects like outfalls, where precise positioning is necessary for functional connections.
Technical Process: GPR units, operated by certified divers or on hydraulic lifts, are positioned within the tunnel to scan the surrounding material. For large-scale projects, portable lifts enable comprehensive scanning from multiple angles, ensuring thorough coverage of tunnel surfaces and intersecting points.
Key Uses: Tunnel-mode surveys are indispensable for maintenance and inspection of critical infrastructure, allowing for high-resolution mapping of structural features in large tunnels, particularly in water outfall and similar engineering projects.