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Making the Invisible - Visible
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SUBSURFACE UTILITY INFORMATION (SUI)
Our systems provide a high-resolution window to the services, utilities and other assets buried beneath our feet.Whether mapping buried and forgotten tram tracks within urban corridors, detecting voids caused by civil works or water ingress, mapping the root systems of protected trees or investigating the subsurface utilities and services across a site, Earth Radar’s technological and software solutions are breaking new ground as to what can be achieved using GPR for subsurface investigations.
The cost of the civil works to trench and install buried pipelines/cable(s) is significantly affected by the density of the ground to be excavated. GPR can be used to profile the ground to allow optimal excavation and trenching techniques to be applied; minimizing cost and optimizing delivery.
Ploughing - Viable in soft-stiff clay and minor rock. Can trench in the order of 2km per day.
Trenching - Capable to excavate through medium-hard rock. Can trench in the order of 200 – 800m per day depending on rock conditions.
By assessing the ground density along a proposed trench route, it is possible to determine the most optimal approach for individual sections of the route dependant on ground conditions. This enables the most efficient, cost effective and timely approach to be calculated; saving time and increasing profit margins.
Earth Radar’s trained team of Geophysical specialists are able to use GPR (Ground Penetrating Radar) to survey the ground conditions along a proposed corridor.
By geo-referencing the GPR data, it is possible to then assess the ground conditions along the route identifying areas suitable for ploughing and areas where trenching will be required. Additionally, the GPR is able to identify any other anomalies observed along the route such as areas with significant amounts of buried rocks/boulders or other subterranean features.
The need to accurately and reliably locate, mark-up and map existing rebar and other features within in-situ reinforced concrete is essential to safely planning drilling or coring works and avoiding costly downtime.
Prior to undertaking destructive investigations/penetration works within/through reinforced concrete, it is highly advised to map the location of the existing rebar to avoid strikes. Earth Radar have undertaken such project across a number of different environments from railway station platforms (where we had to initially eliminate any potential interference issues with the equipment to be used and the rail signal cabling) to high-rise commercial buildings.
Earth Radar’s team of GPR and Geophysical experts are highly experienced in using the various specialist concrete scanning GPR devices available to accurately and reliably map to location of existing rebar and utilities within in-situ reinforced concrete.
To do this the appropriate GPR unit will be chosen to best fit the requirements of the site to be surveyed. One of Earth Radar’s GPR technicians will then undertake the site investigation and mark-up the location of the rebar found within the reinforced concrete.
If required, Earth Radar’s survey team are then able to record and map the findings to allow this information to be taken into consideration by the design team. This helps to limit costly variation orders due to conflicts by addressing any clashes at the design stage.
Tree roots are notoriously difficult to map using traditional 2D-GPR systems due to their meandering alignments and varying depths.
Earth Radar’s LatroTM system is the perfect tool to overcome these challenges to enable you to map the location of major tree roots. This can allow targeted remediation or prevent accidental damage to vital roots that otherwise could result in the death of listed and protected trees.
3D-GPR! By utilising the LatroTM 3D-GPR system to map the area of concern, Earth Radar can generate a plan showing the exact location of the major root network. This is made possible through combining the 3D-GPR dataset into a highly accurate spatial map of the subsurface.
By tracking the LatroTM 3D-GPR using a Total Station, we can achieve survey grade positional accuracy and consistency resulting in the ability to identify and map tree roots.
If required, Earth Radar’s survey team are then able to process and map the findings through to a CAD deliverable to allow this information to be taken into consideration by interested third-parties.
To measure and map the subtle magnetic field variations created by the presence of subterranean features and anomalies that are creating distortions in the magnetic field compared to the surrounding material(s).
Through the use of magnetic gradiometers by highly experienced geophysical technicians, it is possible to measure and analyse subtle distortions in the magnetic field created by subterranean features. This technology can be used to determine near-surface ore deposits, buried features such as metallic objects, or historical anomalies such as kiln sites, drainage ditches or field boundaries.
Earth Radar have a team of qualified Geophysicists who are trained and experienced in undertaking Magnetic Gradiometer Surveys.
They are able to determine the most appropriate systems for the target environment to be able to meet the client’s measurement requirements and then undertake the field works and subsequent processing, analysing and deliverable generation.
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