Site specific ground problems?

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Single-Hole TRT^TM - This technique stems from 'traditional' TRT approach. Its access to the ground for installation of sources and sensors is reduced to a single borehole. This technique is particularly useful for investigation of piles in abutment or pier foundations. It can be used for imaging structural features of sufficiently well known horizontal alignment such as line of piles in a bridge abutment.

For piles or other structural features that are more evenly distributed over wider horizontal area, the survey from at least two, and preferably from three holes is recommended. This approach allows triangulation and better focusing of the reflector tracing.

Single-Hole/Parallel Seismic TRT^TM  is specifically designed for detection of piles and for measuring their depth and assessing their pattern. Its effectiveness depends on an adequate access to the pile cap, and the proper use of repeatable seismic source.
 

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C-TG continues using magnetostrictive actuator driven by a swept frequency signal as very repeatable and reliable seismic source. This approach allows transmitting controlled broad-band seismic waves into the ground by significantly reducing loss of seismic energy in higher frequency range due to plastic deformation of the ground. In turn, broad-band seismic waves provide significant improvement in resolution for both TRT^TM and X-Panel^TM techniques. This effect is particularly important for imaging piles as part of bridge abutment and pier foundations to assess their type, depth, patterns, and overall conditions.

C-TG also relies mainly on using accelerometers and pressure sensitive hydrophones for detection of seismic signals. Sensitivity of these two types of transducers is proportional to the second power of the frequency of seismic vibrations. This type of response provides the most effective compensation for frequency related exponential attenuation of seismic waves in the ground.
TomoView^TM is a stand-alone graphic engine software that has capabilities for data input, survey coordinate verification, imaging local geology and site conditions, adding comments, and enhancing analysis of processed ground images for TRT^TM in tunnels, X-Panel^TM for cross-hole site investigations, CSL^TM for drilled shafts, and SHPS-TRT^TM for pier testing. It also allows exporting 3D files to AutoCAD.
 

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