Assessment of Microgravity Anomalies of Soil Structure for Geotechnical 2D Models
A microgravity investigation on bedrock topography was conducted at Maluri Park in Kuala Lumpur, Malaysia. The study characterized the subsurface structure to delineate soil structure for the geotechnical application. Cross-section modelling of the residual anomaly generated the Maluri Bouguer Anomaly model for test site. The 2D microgravity models produced the contour map, displaying the characterization due to density contrast in rock types while mapping the subsurface geological structure at different depths. Moreover, a synthetic model was initiated with the assumption of lateral distance on the left and right sides taken at 50 m and a depth of 60 m. The results of modeling confirmed that the soil and rock type composition on models test site, i.e: topsoil (1.1 g/cm3), soil (1.8 g/cm3), clay (1.63 g/cm3), gravel (2.0 g/cm3), sand (1.7 g/cm3), shale (2.40 g/cm3), sandstone (2.76 g/cm3) and limestone (2.9 g/cm3). The 2D gravity synthetic model show a good match with the observed microgravity data.
Ebbing, J., Braitenberg, C., Götze, H.-J., 2001. Forward and inverse modelling of gravity revealing insight into crustal structures of the Eastern Alps. Tectonophysics 337, 191–208. doi:10.1016/s0040-1951(01)00119-6
Kamal, H., Taha, M, and Al-Sanad, S.,2010. Environmental Engineering and Geotechnics, GeoShanghai 2010 International Conference. (accessed 02.03.17)
Kearey, P., Brooks, M., Hill, I., 2011. An introduction to geophysical exploration. Blackwell Publishing, Malden, MA.
Lillie, R.J., 1999. Whole earth geophysics: an introductory textbook for geologists and geophysicists. Prentice Hall, Upper Saddle River, NJ. https://nla.gov.au/anbd.bib-an13624882
Pringle, J.K., Styles, P., Howell, C.P., Branston, M.W., Furner, R., Toon, S.M., 2012. Long-term time-lapse microgravity and geotechnical monitoring of relict salt mines, Marston, Cheshire, U. K. Geophysics 77. https://doi.org/10.1190/geo2011-0491.1
Samsudin, Hj., T., 2003. A microgravity survey over deep limesone bedrock, Geological Society of Malaysia, Bulletin 46, pp 201-208 (accessed 12.11.16). http://archives.datapages.com/ data/ geological-society-of-malaysia/bulletins/ 046/ 046001/ pdfs/ 201.htm
Tan, S., M. ,2005. Karstic Features of Kuala Lumpur Limestone. Bulletin of the Institution of Enginner Malaysia, June 2005, 6 -11. (accessed 08.02.17)
Tajuddin, A. and Lat, C. N., 2004. Detecting subsurface voids using the microgravity method-A case study from Kuala Lipis, Pahang, Geological Society of Malaysia, Bulletin 48, p. 31 – 35. (accessed 11.01.16) http://archives.datapages.com/data/geological-society-of-malaysia/bulletins/ 048/ 048001/ pdfs/ 31.htm
Telford, W.M., Geldart, L.P., Sheriff, R.E., 2010. Applied geophysics. Cambridge Univ. Press, Cambridge.
Talwani, M., Ewing, M., 1960. Rapid Computation of Gravitational Attraction of Three‐Dimensional Bodies of Arbitrary Shape. Geophysics 25, 203–225. https://doi.org/10.1190/1.1438687
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