Seismic Refraction Investigation on Limestone Area in Gopeng, Perak
Seismic refraction method is one of the most commonly used geophysical methods in civil engineering that is able to provide detailed information on the distribution and thickness of subsurface layer with characteristics seismic velocities. By necessity, i
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Abstract Seismic refraction method is one of the most commonly used geophysical methods in civil engineering that is able to provide detailed information on the distribution and thickness of subsurface layer with characteristics seismic velocities. By necessity, it also could be a support to the interpretation of geological data. Two-dimensional (2D) seismic refraction tomography is one of the surface geophysical methods used in determining the continuous subsurface profile of ground damage with particular reference to geo materials based on P-wave (Primary velocity, vp) results. This method was used in this study in purpose to determine the subsurface profile from the study area. ABEM Terraloc MK6 seismograph was used to record data from P-wave data acquired. Using OPTIM software package, the subsurface profile based on linear and delay time analysis would be investigated. Based on the study, it was found that overall strata along the study area were reasonable with the previous geological data by using the P-wave seismic velocity. Thus, this study helps in reducing the cost of site investigation significantly. Keywords Geophysical Borehole data
Seismic refraction
P-wave seismic velocities
1 Introduction In identifying layers or soil strata in subsurface area, there are lots of methods that can be used. Geophysical method is one of them. It also consists of many minor sections, such as seismic refraction and reflections, electrical resistivity, ground N.H. Abdullah (&) Faculty of Civil Engineering, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia e-mail: [email protected] H. Awang Institute for Infrastructure Engineering and Sustainable Management, Faculty of Civil Engineering, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia © Springer Science+Business Media Singapore 2016 M. Yusoff et al. (eds.), InCIEC 2015, DOI 10.1007/978-981-10-0155-0_26
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penetration radar, and electromagnetic. The discipline of geophysics has developed for use in many fields such as environment, engineering, mining, and archeology where the depth of investigation required is relatively shallow (usually less than 100 m). According to [1–3], seismic is most the favorite method in the field of geophysics to determine the internal distribution of materials within a slope, water effect on slope, identifying sliding surface geometry, mass movement, and geo materials features for rehabilitation and mitigation purposes. In Malaysia, as well as elsewhere, seismic refraction is the most popular geophysical technique in engineering application. The seismic refraction method was carried out to obtain the subsurface profile of the rock mass. It also is one of the effective methods applied in shallow exploration, including determining the depth of bedrock and the subsurface structural features, such as cracks in the rock bodies. Besides that, an attractive target for shallow seismic refraction was used in environmental investigation, such as to investigate lateral or vertical c
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