Underground Services Utility GPR Surveys in Surrey and London
Underground Services Surveyors specialising in GPR (Ground Penetrating Radar) surveys, Radio Detection Scanning, Drainage Surveys and CCTV Drainage Condition Surveys. All utility surveys are PAS-128 compliant. Utility Surveyors UK.
With offices located in Sussex and Hampshire, we specialise in the mapping of underground services accurately on the ground to show a full representation of existing services running through the potential development site or highways. Underground Utilities Mapping UK.
To locate the position of underground services and pipes through GPR technology is critical before any excavation work begins, to avoid a potential disaster. Undertaking an underground services survey report gives you the vital information required to avoid such problems. All services located and mapping from a GPR utility survey is accurately plotted onto a CAD drawing using Leica Total stations and can be delivered in a variety of file formats.
X-Ray Surveys' professional staff based in Sussex and Hampshire operate the latest in Ground Penetration Radar technology such as the IDS Detector Duo and Radio Detection RD8000. CCTV Surveys are carried out operating the MiniCam Solo Pro 60 Meter Drain Camera and Wincan V8. Underground Utilities Mapping London. Underground Utilities Mapping Surrey.
Underground GPR Utility Surveys
X-Ray Surveys attend site equipped with an original land survey which shows the position of all service covers. The surveyors use GPR to trace underground cables, pipes using Radio Detection methods and ground penetrating radar equipment such as the RD8000 Detector, TX10 Genny and IDS Dectector Duo GPR. This information is then added to the existing survey, all connections, depths to pipes or cables direction are clearly presented on the drawings. All utility surveys are PAS-128 compliant. GPR Surveys in London and Surrey.
GPR Drainage Investigations.
X-Ray Surveys attend sites from London to Surrey equipped with an original land survey which shows the position and the level of manhole covers. Manhole covers are lifted in a safe and secure manor to ensure no danger is at risk to the public. Invert GPR readings are measured, direction of flows are established and pipe sizes noted along with sewer construction, either foul or surface. This information is then added to the existing GPR utility survey, all connections, invert levels and direction of flows are clearly presented on the drawings.
What is a Utility Survey - Buried Services Survey - Utility Mapping?
A buried services survey, also known as underground utility survey or utility mapping, is a process of locating and mapping underground utilities and services within a specific area. These underground utilities can include water pipes, gas pipes, electrical cables, telecommunication lines, sewage systems, and more.
The purpose of a buried services GPR survey is to accurately identify the locations of these utilities before any excavation or construction work takes place in an area. It is essential for several reasons:
Safety: Knowing the exact locations of underground utilities helps prevent accidental damage during excavation, which can lead to dangerous situations, service disruptions, or injury to workers.
Cost efficiency: By identifying the utilities' locations through advanced GPR, project planners can avoid costly damages, delays, and rework caused by accidental hits on underground infrastructure.
Compliance: Many countries and regions have regulations that require utilities to be located and marked with a GPR survey before any digging activity.
The GPR utility survey is typically conducted using various methods and technologies, such as ground-penetrating radar (GPR), electromagnetic detection, utility records, and physical inspections. The gathered GPR data is then compiled and presented on maps or plans, providing a comprehensive understanding of the underground infrastructure in the surveyed area.
Specialized companies or surveying teams often carry out buried services surveys to ensure accurate and reliable results.
PAS 128 is a British standard that provides guidelines for conducting utility surveys and managing underground utility information. It was first published by the British Standards Institution (BSI) in 2014 and has since been widely adopted in the UK and internationally. PAS 128 aims to improve the accuracy, consistency, and quality of utility surveys to reduce the risk of damaging underground utilities during construction or excavation activities.
PAS 128 defines four levels of GPR utility surveys, ranging from D (lowest) to A (highest), based on the level of accuracy and detail required:
Level D (Desktop Utility Records Search): This level involves a review of existing utility records, as-built drawings, and historical data to gather information about the location and type of utilities in the area. It does not involve any physical site investigation or data collection.
Level C (Site Reconnaissance): At this level, a site visit is conducted to visually inspect the surface for visible utility features and evidence of buried utilities. This may include manholes, valve boxes, utility markers, or other surface-level indicators. The surveyor records the findings, but no intrusive investigation is performed.
Level B (Detection Survey): Level B involves the use of geophysical techniques, such as Ground-Penetrating Radar (GPR) and Electromagnetic Induction (EM), to detect and locate underground utilities. This level provides a more detailed assessment than Levels D and C and is suitable for projects with moderate utility risk.
Level A (Verification Survey): This is the highest level of GPR utility survey accuracy. Level A involves the actual exposure and verification of underground utilities through excavation or potholing. By physically exposing the utilities, the GPR surveyor can precisely determine their horizontal and vertical positions, as well as their dimensions and conditions
The choice of PAS 128 level depends on the specific project requirements, potential utility risks, and the desired level of accuracy. Higher PAS 128 levels, such as B and A, provide more detailed information about the underground utilities but may require more time, effort, and cost compared to lower levels (C and D).
PAS 128 is an essential standard GPR survey for projects from London to Sussex that involve excavation or construction in areas with existing underground utilities. By following the guidelines outlined in PAS 128, project stakeholders can reduce the risks associated with underground utility strikes, enhance safety, and minimize costly delays and repairs. Utilities Mapping Sussex.