Tuesday, 31 March 2009

Underground Utility Mapping

Frequently Asked Questions:

Q: Why do I need an underground utility detection (UUD) survey ?
A: It allows you to find out whats buried without any digging. This non-invasive method of detection is crucial in avoiding costly damages to assets or injuries/loss of life during 'blind' excavations.

Q: Is it really necessary ?
A: Local authority of certain high-density areas (e.g. Kuala Lumpur, Penang and Johor Bahru) may require UUD data to be submitted as part of the as-built survey in the application for a Development Order (DO). A recent customer inquiry involving a factory development in Subang shows that other municipal councils are imposing similar requirements.

Q: Can Jurukur Perunding do a UUD survey ?
A: Several JUPEM guidelines are evident of such work being undertaken by land surveyors. Work undertaken by our company can be endorsed by one of our licensed land surveyors.

Q: What can you detect ?
A: We can typically propose suitable methods of acquiring non-intrusive information on buried structures (up to a depth of about 10 feet) using a combination of equipment such as electromagnetic locators and ground penetrating radar. Things we can detect include:-
  • Metal objects ( e.g., pipes, tanks )
  • Asphalt thickness ( layer of road surface material )
  • Water body ( e.g., leaks and water table )
  • Non-metallic objects ( suitable cables using flexi-trace )
The timing of survey is crucial (for example, high water content during the monsoon season will affect the results).

Kindly contact our Engineering Surveys Division for further details. (jc)

1 comment:

  1. "The danger of damaging underground parts of utility networks, such as pipes and cables, is the bogeyman permanently haunting every constructor. In Germany, for example, annual loss incurred during digging works is 400 million Euros. Hitting a gas pipeline may also trigger hazards, up to and including explosions. " From the December 2008 issue of GIM magazine (http://www.gim-international.com)