PAS128 Underground Utility Survey

Job Information:

Our team was invited to conduct Utility, Underground Structures, and Features Surveys along the proposed extents of the project in Edinburgh. The primary objective of this survey was to provide comprehensive details of all underground utility services running throughout the worksite. Additionally, the survey aimed to supply depth information below the existing ground surface and to determine the planar extents of potential sub-surface structures, including basements, to ensure thorough understanding and planning for the project.

Scope Of Work:

Supply of surveying team:

1no Utility Surveyor, 1no Assistant and 1no Land Surveyor.

Supply of Utility Survey Equipment on site:

Vivax Metrotech VLocPro2 Receiver and VLoc Transmitter and IDS RF Hi-Mod GPR.

Supply of surveying instruments on site:

1no 1” Trimble Total Station (or equivalent) and GNSS receivers

Supply of data processing and final deliverables.

Methodology: 

Geo-Info has extensive experience in underground utility and structure surveys, having recently completed similar work for many tier 1 clients. For this project, Geo-Info will conduct a non-intrusive underground utility investigation in accordance with PAS 128:2014, utilizing Survey Quality Level B1P and Detection Methods M3P and M4P, as requested by the client.

Ground Penetrating Radar (GPR) will be the primary method for detecting underground structures and features, as it is best suited for the densely populated and congested city center environment. Other methods, such as seismic, micro-gravity, resistivity, and conductivity, were considered but deemed unsuitable due to interference from factors like vibration, metallic objects, and high-rise structures.

Two teams will conduct the survey. The utility survey team will consist of a Utility Surveyor, an Assistant, and a Land Surveyor, while the underground structures team will include a Geophysicist and an Assistant. Both teams will work in parallel, ensuring efficient and comprehensive data collection for the project.