Background Coring of bridge deck with post-tension cables required for condition assessment. Methodology Ground Penetrating Radar (GPR) used to locate depth and lateral position of all post-tension cables and rebar. Initial large scale survey performed to locate all targets on…
Background multiVIEW conducted surveys for undocumented and non-visible repair zones on Highway 401 near Toronto, Ontario.Historical records of repair did not exist or were hard to locate. Methodology Data were acquired at 10mm station intervals. Depths were determined from the localized…
Overview Ground Penetrating Radar (GPR) uses the physical principles of electromagnetic waves’ propagation throughout the media. The GPR transmitted signal will be reflected, refracted and diffracted from the boundaries between objects with different dieletric properties. Root detection and mapping using…
Background multiVIEW conducted an investigation of Highway 401 near Toronto, Ontario in order to determine construction practice zoning. Historical records of construction and repair did not exist or were hard to locate. The objective of the RoadMap GPR survey was to assess…
Background multiVIEW was retained to evaluate the condition of a concrete bridge deck overlaid with asphalt. Methodology GPR profiles were collected on a set of lines over the bridge deck. Steel reinforcing bar (rebar) perpendicular to the line direction produced a…
Background An engineering firm retained multiVIEW to perform a geophysical survey. The primary objective was to complete an electromagnetic survey in an area that has exhibited very high pH readings in surface water and groundwater, with the aim of possibly defining…
Background An engineering firm retained multiVIEW to perform a geophysical survey. The objective of the survey was to delineate the spatial position of any possible voids underneath a slab-on-grade concrete floor. The information was used by the engineering firm to…
Background An engineering firm retained multiVIEW to perform a geophysical survey. The objective of the survey was to map the location of possible voids beneath the concrete floor slabs in four small tunnels situated in the basement of a large…
Background A contractor retained multiVIEW to carry out a ground penetrating radar survey in two underground sewer pipes. The primary objectives of the survey were to map the thickness of the pipes and to determine if any voids had developed in…
Overview Construction and design engineering activities requiring bedrock depth data benefit regularly from geophysical site evaluations. Whether budgeting for road construction or planning for a backyard pool, identifying the extent and location of bedrock prior to excavation can significantly reduce…
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