Seismic Refraction Tomography and MASW Survey for Geotechnical Evaluation of soil for the Teaching Hospital Project at Mosul University

Volume 16 , Issue 1 , December 2014 , Pages 1-14

Authors

¹ Dams & Water Resources Research center. University of Mosul

² Collage of Science, University of Mosul

This study includes Seismic Refraction Tomography (SRT) and Multi-channel Analysis of

Surface Waves (MASW) survey. 12 shallow refraction profiles and 2 profiles for MASW were

conducted in teaching hospital project site in Mosul University to delineate some of shallow soil

engineering characteristics for construction purpose. The linear arrays by using 12 geophones with

10 Hz frequency are used. Both of compressional (P) waves and MASW data were acquired and

interpreted using seismic tomography method and MASW methods to create 1-D shear velocity

model respectively. A number of engineering parameters such as Concentration Index, Material

Index, Density Gradient and Stress Ratio are calculated. The seismic velocity values ,engineering,

consolidation ,and strength parameter show that the site have three layers just as follows: the first

one is the upper layer which corresponds to recent superficial deposits is characterized by an

incompetent rock quality, the second one is the middle one that corresponded mostly to the river

deposits composed especially of River terraces and clays is characterized by fairly competent rock

quality While the third one is the lower layer is corresponded to the upper part of Fat’ha formation

which is mostly composed of marl layers is good competent rock quality .Hence the 3rd layer is

suggested for engineering and foundation purpose.

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