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  • Industry
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    • Construction
    • Due Diligence
    • Geology
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  • Applications
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    • Survey Design
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    • Reports and Maps
  • Technology
    • DELTA Bridge Scanner
    • EPSILON Road Profiler
    • POISSON Time Series
    • GPR
    • Utility Locates
    • Metal Detector
    • Conductivity Mapper
    • MASW
    • Seismics
    • Induced Polarization
    • Borehole Logging
    • Geophysical Methods
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ROAD STRUCTURE IMAGING

Phone: (365) 889 5400

 Contact: sales@geophysicshm.com

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Geophysical techniques such as Ground Penetrating Radar, Infrared Tomography and MASW are inexpensive non-intrusive techniques that provide detailed information of the condition and image of the structure of the road section in record time. 

Conventional road structure analysis and pavement evaluations are usually done by visual inspection and intrusive testing such are coring and geotechnical borehole drilling. This practice is intrusive in nature and requires lengthy closure  of the traffic lanes due to mobilization of large machinery and personnel to the road surface for conducting the survey and analyzing the affected areas. 

Granular Thickness Map

GPR Road Scanning for Pavement  Resurfacing  / Asphalt Thickness Map

Geophysical techniques for pavement analysis are commonly used for road and sub-base layer characterization and thickness estimation, void and sinkholes mapping and monitoring, culverts, buried concrete structures and utility mapping, pavement defects detection and assessment, asphaltcompaction analysis, cracking, and delamination mapping. 

Geophysical Methods Used forRoad Structure Imaging
 

EPSILON Profiler

GPR

PDP

Thermal Imagery

 
Applications and Solutions
  • Airport Runways Integrity Assessment
  • Asphalt Density Profiling
  • Asphalt Pavement Thickness
  • Bedrock Depth
  • Buried Corduroy Road
  • Buried Rail Tracks Mapping
  • Buried Wood Logs Mapping
  • Concrete Structure Imaging
  • Culvert Mapping
  • Geotechnical Borehole Locations
  • Granular Thickness
  • Manhole Cover Mapping
  • Native Soil Profiling
  • Pavement And Granular Material Changes
  • Pavement Cracking
  • Pavement Deformation And Distortion
  • Pavement Deterioration
  • Pavement Structure Imaging
  • Pavement Surface Defects
  • Road and Highway Utility Mapping
  • Road Integrity Assessment
  • Road Resurfacing Assessment
  • Road Settlement
  • Road Voids And Sinkholes
  • Roads And Runways Structure Imaging
  • Soil Layers
  • Sub-base Thickness
  • Sub-grade Base Depth

Asphalt Thickness Contour Grid Maps

"EPSILON" high speed GPR scanning is used by Geophysics HM Ltd for estimating the asphalt thickness for roads and HWY's. The road asphalt pavement layers are designed for interacting with wheel forces of the heavy traffic, temperature variations and and weather conditions. The performance of the pavement will dictate the quality of the road service and the life span of the structure. 

The thickness, structure and composition of the asphalt layers will dictate the performance of the road under different load and conditions. If the asphalt layer is thin the deterioration of the road will increase rapidly, alternatively with the increases of the thickness, the bearing capacity of the pavement increases leading to better performance and longer service. 

Road Engineering Sections

Scaled  sections of the road structure are very valuable to geotechnical professionals for road design, rehabilitation, resurfacing and maintenance. The sampling or station intervals of the sections provided by Geophysics HM Ltd are within the meter accuracy or less. This will cover the large gap between geotechnical boreholes and cores usually drilled in the range of 100m to 500m for large scale projects with high degree of detail. The sections will also have excellent vertical resolution of the asphalt layers (including the wearing course, binder and asphalt bottom layer), the Granular Base and theSub-base.

Culvert Structure Imaging  

High speed and detailed Ground Penetrating Radar is utilized for detecting metallic and concrete culvert  structures bellow the road.  Mapping the exact location, extent and confirming the cover depth of the culvert structure is vital and required for road maintenance, resurfacing, geotechnical coring  and for assessing the integrity of the structure itself.

PavementConcrete Structure Mapping 

Geophysics HM Ltd can provide comprehensive plan maps and cross-sections with the extent and location of concrete pavement structures not documented or tested with geotechnical boreholes. 

Corduroy Roads, Utilities and Buried Wood Logs

Mapping and locates of corduroy road beds, utilities and wood logs buried under the road structure is possible with Ground Penetrating Radar  without the need of road closures and expensive intrusive techniques such as trenching or coring.  

Pavement Defects and Condition Assessment 

The condition, quality and structural defects of the road structure can be assessed using different non-intrusive geophysical techniques and NDT methods including Ground Penetrating Radar,  MASW, Electric Tomography and Thermal Imagery.

Granular Baseand Sub-base Thickness Contour Grid Maps

The granular base is the aggregate layer below asphalt pavement and concrete pavement structures. The granular is designed for providing the bearing capacity and strength required for the pavement structure.  The granular reduces the stress of the subgrade layer and provides drainage for the pavement. The Sub-base is the lower granular layer and the foundation of the pavement structure and provides drainage and protection from extreme climate conditions. 

Void and Sinkholes Mapping and Monitoring

Sinkholes and voids under the road structure  may develop under different circumstances and ground conditions. They may originated from natural processes such as karst formation, rainfalls, landslides, soil drainage or generated from industrial activities, infrastructure settlement or service disruptions such as water and sewer pipe leaks that create voids and sinkholes.

Geophysical techniques can be used for rapid and efficient assessment of the road structure and subsurface conditions where there is a potential for sinkhole development, minimizing the risk of losing human life and property damages. 

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Geophysics HM Ltd

Geophysics HM Ltd
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EPSILON GPR Road Imaging by Hernandez Vazquez, I (2021/2).

sales@geophysicshm.com

info@geophysicshm.com

ghm@geophysicshm.com

emartinez@geophysicshm.com

Geophysics HM Ltd Office

51 Strachan Street E.  Hamilton.  Ontario. L8L3M3

Phone: (365) 889 5400

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