Subsurface Mapping – Railway Utility Survey
Subsurface Mapping – Railway Utility Survey Summary:
A road over a rail bridge was to be demolished with a new bridge built in its place. The accurate location of all detectable utility services was required in order divert or cap all services before the removal of the bridge and substructure. The data was also used to aid the design of the new bridge so that the required utility ducts and infrastructure could be incorporated into the replacement bridge design. The GPR Survey data was also used to map structural beams within the existing bridge deck.
- Cables and drainage were traced with cobra and sonde and RD8000.
- Using existing scan data we were able to model the bridge, than using dimensions taken on site we were able to calculate chamber sizes.
Example manhole schedule shows the invaluable level of detail that is achieved.
Having a separate manhole schedule means a clean and clear finish to the topographical survey. Eliminating possible confusion.
- The client will be able to see a complete model using cross department expertises. This project shows how traditional utilities data can be utilised to produce BIM level 2 deliverables.
- 3D utilities enable easy analysis of clash detection and enables further flow analysis for the addition of other services.
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