Abstract:

Geophysical surveys are non-destructive methods to investigation the underground soil structures. Common geophysical surveys for civil engineering purposes are electrical resistivity tomography (ERT), microgravity, magnetic and seismic survey. This presentation will elaborate the applications, limitations and principles of geophysical surveys with particular reference to mapping of sub-surface bedrock, karst features, detection of buried pipelines or man-made structures, slope stability studies, etc. Case histories will be presented to show geophysical surveys are cost effective and can be conducted within a shorter time frame, as compared to geotechnical surveys. It can also provide sub-surface information in 2D or 3D dimension, which can be used for engineering design and planning. Interpretation of geophysical data often required input from borehole drilling results to ascertain sub-surface soil properties. For more convincing results of engineering-geologic investigations, integration of more than one geophysical survey methods is most desirable    

Profile of Speaker:

Mr Woo Chaw Hong graduated from University of Malaya  in 1994 with degree in Applied Geology. He has over 24 years of experiences in Engineering Geologic investigations. Mr Woo worked as a Geophysicist at Racal Survey (M) Sdn Bhd in 1994 and currently is Director in Petroseis Sdn Bhd. and Netseis Resources Sdn. Bhd. Mr Woo also involved in 2D high resolution data acquisition, mineral Exploration and Groundwater Exploration.