Large Diameter Pipe Inspection

Large-Diameter Pipe Inspection (18″ and larger)

SewerVUE Surveyor and MPIS Float inspecting a large-diameter pipe with CCTV, LiDAR, sonar, and PPR.

Large-diameter sewers and water mains present distinct inspection challenges: dewatering is expensive, bypass pumping is disruptive, and conventional CCTV lacks the effective range for single-run assessment. The Surveyor (tracked, drainable conditions) and the MPIS Float (flowing conditions) each carry the full sensor stack: HD CCTV, 3D LiDAR, 2D LiDAR, profiling sonar, and pipe-penetrating radar. All data streams are synchronised into a single dataset per deployment.

The result is measured rehabilitation data: remaining wall thickness, defect locations, sediment volume and distribution, deformation and ovality, and voids forming behind the pipe wall before they surface as sinkholes.

Multi-Sensor Condition Assessment Features

  • Pipe Penetrating Radar
  • LiDAR
  • CCTV
  • Ability to deploy up to 6000 ft
  • Remaining Wall Thickness
  • Voids Before They Become Sinkholes
  • Defects And Potential Blockages
  • Deterioration Levels
Multi-Sensor Condition Assessment

SewerVUE has a range of floats and surveyors to help you gather the qualitative data necessary to make informative decisions on large-diameter pipes. To find out which solution would would best suit you, contact us today or click here to learn more about our products.


Hong Kong Case Study

SewerVUE's team travelled to Hong Kong to inspect a 7km long sewer tunnel. The tunnel, a 10-foot diameter reinforced concrete tunnel, had been in service for 15 years and had never been inspected. The objective was to assess the condition of the tunnel using a combination of CCTV and LiDAR.

Though it was a long day, SewerVUE completed the inspection in a single day, on budget. The results showed only a small number of structural defects.In large diameter pipes such as this one, CCTV is not particularly useful. However, combined with other sensor technologies, we delivered a detailed report outlining the structural and service defects in the Tolo Harbor TEES Tunnel.