Assessing the condition of a road or bridge requires accurate data on subsurface features. Traditional inspection methods, when applied on their own, lack effectiveness. Visual data is highly subjective and influenced by technician training and interpretation. Coring is costly and fails to provide a quantifiable, representative sample of the entire inspection area.
In response to these challenges, municipalities and engineering firms across the country are beginning to incorporate non-destructive technologies such as Ground Penetrating Radar (GPR) and CCTV Camera Sewer Inspection into the inspection process to supplement traditional techniques. Whether you need to locate conduits before cutting concrete, assess pipe condition or map deterioration along a bridge or road, these technologies provide the level of insight required to make truly informed decisions.
ARA Engineering Ltd
Common field investigations often rely on discrete, widely spaced sampling which provides limited information: it is assumed that the data residing between discrete points is consistent, but this is not always the case. GPR fills in these information gaps and allows more data to be captured with less damage to the existing road.
What is Ground Penetrating Radar (GPR)?
Ground Penetrating Radar (GPR) is a non-destructive technology that is used to effectively analyze structures, assess bridge deck deterioration, measure asphalt thickness and determine the subsurface conditions of bridges, roads and highways. It works by transmitting high frequency radio waves into the ground or structure and analyzing the reflected energy to create a profile of the subsurface features. The reflections are caused by a contrast in the electrical properties of subsurface materials which can be indicative of changes in water content, void spaces in the ground, rebar or post tension cable corrosion, asphalt deterioration and other factors.
multiVIEW offers the following bridge & road inspection services:
- Asphalt pavement and granular thickness
- Condition for roads and runways
- Sub-base thickness and depth
- Sub-grade depth
- Utility mapping
- Corduroy road and wood logs mapping
- Void and sinkhole mapping
- Native soil-bedrock interface mapping
- Pavement structure analysis
- Geotechnical borehole locations
- Changes in pavement and granular materials
- Locate areas of deteriorating pavement
- Concrete structure imaging
- Map stratigraphy
- Depth to bedrock estimation
- Soil layer mapping
- Pavement surface defects
- Pavement deformation and distortion
- Road settlement
- Pavement cracking and patching
- Sinkhole mapping
- Void imaging
A Signal Amplitude Attenuation Contour Map created with GPR data, indicates areas of potential bridge deck deterioration.
Learn more about our road and bridge inspection services including our High-Speed Ground Penetrating Radar solution.