Parallel Seismic Testing
Geo Dynamics yet again pioneered the concept of evaluation of depths of existing foundations by demonstrating this first time to the railways in 2009 for the Bilaspur division. We successfully proved that depths of existing foundations of bridges could be evaluated using Parallel Seismic Method.
The testing is conducted by drilling a borehole adjacent to the foundation, lowering a hydrophone into the borehole and then taking readings at every pre-defined intervals. The impact is generated on the top of the foundation whose depth is to be ascertained. The method is accurate and versatile when top of foundation is not accessible.
There are no code provisions for this method as it is an extension of the low strain test method and the equipment complies ASTM D5882.