Multi-channel Analysis of Surface Waves (MASW) - seismic survey

The MASW method is a relatively recently developed seismic survey method when compared to the more conventional refraction seismic survey method.  The MASW differs from the refraction method in that it can locate weaker layers beneath stronger layers, and it is generally more time and cost efficient in the field.

MASW is a non-destructive and non-invasive method of geotechnical investigation. Typical applications are:

• Depth of bedrock and rippability
• Defining extent of landfills
• Defining extent of weak compressible clay
• Defining buried paleochannels
• Providing small strain stiffness parameters
• Measuring the effect of High Energy Impact Compacted fill with large particle sizes that prevent the use of intrusive testing (CPT)

Generally the MASW can provide a more comprehensive view of the underground soil conditions than is possible with traditional testing methods, such as drilling.

Black Geotechnical in conjunction with Terra Australis Geophysica Pty Ltd were the first to use MASW in Australia in 2004. Since then we have continued to developed efficient fieldwork and post processing methods to provide the best service possible.