Infrastructure Obstacles

Some of the greatest challenges that designers and construction teams of major infrastructure and civil projects face is the identification of underground utilities and buried obstacles. Underground utility records are frequently inaccurate, out of date or non-existent. The inability to see the underground network of services and having a proven methodology to shape project designs around utility conflicts has been impossible until now.

Our solution is CART

Computer Assisted Radar Tomography (CART) provides high resolution 3D imagery of the subsurface, depicting underground utility lines, objects, and other features with amazing clarity and accuracy. CART is a combination of arrayed ground penetrating radar (GPR) hardware, geophysical diffraction tomography (GDT) software, surveying, and subsurface utility engineering (SUE). These processes are collected, analysed and integrated into a deliverable format which enables underground assets to become visible with continuous coverage.

Our Methodology

Typically, Vac Group will arrive on site, scan and collect comprehensive data from the designated area of the project. This will be performed in the main by our 3D Computer Assisted Radar Tomography; aided as needed with 2D GPR and EMI. This data is then interpreted by our skilled operators and converted into 3D imagery. The deliverables from the process will then be converted into multi-layer survey quality CAD format drawings that can be overlayed on current plans with satellite imagery to aid in the orientation and interpretation. Preliminary deliverables will be available for viewing by the client 3 – 5 days post scanning to identify mutual beneficial potholing locations to be performed by our specialised non-destructive digging equipment for ground proving and calibration purposes.

CART Deliverables

  • Computer Assisted Drawing (CAD) file
  • Dated PDF drawings
  • Movie file of 3D Radar data

CART Advantages

Some advantages of utilising CART on major projects and high utility conflict areas include but are not limited to:

  • Ability to identify utility conflict areas during design stage, effectively eradicating the need and costs associated with redesign;
  • Reduce the need for ‘blind’ digging and trenching by pinpointing the vicinity of utilities requiring exposure by potholing;
  • Access to information supplied through GPS Co-ordinates and Total Robotic Survey station which enables the identification and pinpoint utility data at any stage in the project; Continuous coverage of underground utilities and associated features which provides confidence and eliminates ‘guess’ work;
  • The ability to inject CART data into existing plans and provide updated utility records;
  • Confidence in developing fixed cost quotation of works and elimination of budget blow outs.

The Outcome

Suppling survey quality information facilitates better design, knowledge and confidence of utility information. This offers you the ability to make accurate cost and risk assessment decisions. This accurate information injected into your design further offers you the ability to force better tenders and drive project schedules. Vac Group is committed to providing solutions and investing in technologies that minimise the risks and costs yet also enhances and improves the confidence, accuracy and protection of underground assets.

For further information on our services please don’t hesitate to contact us.