Subsurface utility engineering by Advance Scanning Services
- 1. SUESUBSURFACE UTILITY ENGINEERING FOR LOCATION AND DAMAGE PREVENTION OF UNDERGROUND UTILITIES
- 2. SUBSURFACE UTILITY ENGINEERING • Understanding SUE • Why SUE is important • Mechanics of SUE
- 4. UNDERSTANDING SUE Subsurface utility engineering is an engineering practice that encompasses the management of risks associated with many aspects of infrastructure project management such as …… • Underground utility relocation • Infrastructure planning and estimation • 3d mapping of utilities for design • Correct Identification and location of underground utilities • Road and Highway upgrades
- 5. UNDERSTANDING SUE Australian Standards of Practice • AS 5488-2013 • Contents: Definition of SUE Quality Levels
- 6. WHY SUE IS IMPORTANT
- 7. WHY SUE IS IMPORTANT Prevention of damage to existing subsurface utilities • Power • Water • Gas • Sewer • Drainage • Communications • CCTV • Data • Fuel
- 8. WHY SUE IS IMPORTANT We can not rely purely on One Call ( DBYD ) systems or GIS overlays to provide accurate location of underground utilities.
- 9. WHY SUE IS IMPORTANT Risk management is the essence of SUE, by utilizing all aspects of SUE you are minimizing costly delays and potentially saving lives. • The Risks Project delays Damage to critical utilities Safety of the public Environmental damage Costly design errors Insurance claims Loss of reputation Time / Budget penalties
- 10. MECHANICS OF SUE
- 11. MECHANICS OF SUE Australia recently released AS5488-2013 which defines the quality levels of Subsurface Utility Engineering. • Quality Level A • Quality Level B • Quality Level C • Quality Level D
- 12. MECHANICS OF SUEQUALITY LEVEL D (QL-D) IS THE LOWEST OF THE FOUR QUALITY LEVELS. THE ATTRIBUTE INFORMATION AND METADATA OF A SUBSURFACE UTILITY CAN BE COMPILED FROM ANY, OR A COMBINATION OF THE FOLLOWING : • Existing records. • Cursory site inspection. • Anecdotal evidence. • Utility owner. • Indication of utility type. • The date of installation. • An indicative location of the surface and subsurface features. • The date the data was captured • The source of information
- 13. MECHANICS OF SUE
- 14. MECHANICS OF SUE QUALITY LEVEL C (QL-C) IS DESCRIBED AS A SURFACE FEATURE CORRELATION OR AN INTERPRETATION OF THE APPROXIMATE LOCATION AND ATTRIBUTES OF A SUBSURFACE UTILITY ASSET USING A COMBINATION OF EXISTING RECORDS AND A SITE SURVEY OF VISIBLE EVIDENCE. • Full utilization of QL-D. • An interpolation of the location and direction of the utility using surface features as points of reference. • Feature codes of surface features, pits, access chambers, poles, valves and hydrants • The location of surface features measured in terms of relative spatial positioning with a maximum horizontal tolerance of +-300mm
- 15. MECHANICS OF SUE
- 16. MECHANICS OF SUE QUALITY LEVEL B (QL-B) PROVIDES RELATIVE SUBSURFACE FEATURE LOCATION IN THREE DIMENSIONS. THE MINIMUM REQUIREMENT FOR QUALITY LEVEL B IS RELATIVE SPATIAL POSITION. • Full utilization of QL-D & QL-C • The location of surface features measured in terms of relative spatial positioning with a maximum horizontal tolerance of +-300 mm and maximum vertical tolerance of +- 500mm. • The locating method(s) used to obtain the attribute information
- 17. MECHANICS OF SUE
- 18. MECHANICS OF SUE QUALITY LEVEL A (QL-A) IS THE HIGHEST QUALITY LEVEL AND CONSISTS OF THE POSITIVE IDENTIFICATION OF THE ATTRIBUTE AND LOCATION OF A SUBSURFACE UTILITY AT A POINT TO AN ABSOLUTE SPATIAL POSITION IN THREE DIMENSIONS. IT IS THE ONLY QUALITY LEVEL THAT DEFINES A SUBSURFACE UTILITY IS “VALIDATED” • Full utilization of QL-D, QL-C, QL-B. • Utility type, status, material, size & configuration. • The location of points surveyed on surface and subsurface features measured in terms of absolute spatial positioning with a maximum horizontal and vertical tolerance of +- 50mm. • Survey control information used to determine the absolute spatial position of the utility. • The survey and locating methods used to obtain the attribute information.
- 19. MECHANICS OF SUE
- 20. SUESUBSURFACE UTILITY ENGINEERING FOR LOCATION AND DAMAGE PREVENTION OF UNDERGROUND UTILITIES