1. bookVolume 63 (2016): Issue 2 (July 2016)
Journal Details
License
Format
Journal
eISSN
1854-7400
First Published
30 Mar 2016
Publication timeframe
4 times per year
Languages
English
access type Open Access

Multichannel analysis of the surface waves of earth materials in some parts of Lagos State, Nigeria

Published Online: 26 Oct 2016
Page range: 81 - 90
Received: 11 May 2016
Accepted: 16 Jun 2016
Journal Details
License
Format
Journal
eISSN
1854-7400
First Published
30 Mar 2016
Publication timeframe
4 times per year
Languages
English
Abstract

We present a method that utilizes multichannel analysis of surface waves (MASW), which was used to measure shear wave velocities, with a view to establishing the probable causes of road failure, subsidence and weakening of structures in some local government areas in Lagos, Nigeria. MASW data were acquired using a 24-channel seismograph. The acquired data were processed and transformed into a two-dimensional (2-D) structure reflective of the depth and surface wave velocity distribution within a depth of 0–15 m beneath the surface using SURFSEIS software. The shear wave velocity data were compared with other geophysical/ borehole data that were acquired along the same profile. The comparison and correlation illustrate the accuracy and consistency of MASW-derived shear wave velocity profiles. Rigidity modulus and N-value were also generated. The study showed that the low velocity/ very low velocity data are reflective of organic clay/ peat materials and thus likely responsible for the failure, subsidence and weakening of structures within the study areas.

Keywords

[1] Adegbola, R.B., Ayolabi, E. A., Allo, W. (2012): Subsurface characterization using seismic refraction and surface wave methods: a case of Lagos State University, Ojo, Lagos State. Arab J geosci. DOI 10.1007/ s12517-102-0784-2.Search in Google Scholar

[2] Miller, R. D. Xia, J. Park, C.B. Ivanov, J. M. (1999): Multichannel analysis of surface waves to map bedrock. Leading Edge, 18 1392-96.10.1190/1.1438226Search in Google Scholar

[3] Gucunski, N., Woods, R.D.(1991): Instrumentation for SASW testing, in Geotechnical, special publication no 29,Recent advances in instrumentation, data acquisition and testing in soil dynamics edited by K.S Bhatia and G.W. Blancy, America Society of Civil Engineers. 1-16.Search in Google Scholar

[4] Park, C.B., Miller ,R.D., Xia, J. (1996): Multi-channel analysis of surface waves using vibroseis, paper presented at the 66th Ann. Mtg. of SEG, Denver, expanded abstract 68-71.Search in Google Scholar

[5] Xia, J., Miller, R.D., Park, C.B. (1999): Estimation of near-surface shear-wave velocity by inversion of Rayleigh waves. Geophysics, 64 691-700.10.1190/1.1444578Search in Google Scholar

[6] Jones, H.A., Hockey, R.D. (1964): The geology of part of South-Western Nigeria Geological Survey of Nigeria Bulletin No 31.Search in Google Scholar

[7] Longe, E.O., Malomo, S., Olorunniwo, M. A. (1987): Hydrogeology of Lagos metropolis. J. Afr Earth Sci., 6(3) 163-174.10.1016/0899-5362(87)90058-3Search in Google Scholar

[8] Adeyemi, (1972): Sedimentology of Lagos lagoon. Unpublished B.Sc. Thesis, Obafemi Awolowo University, Ife-Ife, Osun State, Nigeria.Search in Google Scholar

[9] Bankole, I.S., Schrank, E., Erdtmann, B. (2007): Palynology of the Paleogene Oshosun formation in the Dahomey basin, Southwestern Nigeria. Revista Espanola de Micropaleontologia,39 (1-2) 29-44.Search in Google Scholar

[10] Socco, L.V., Strobbia, C. (2004): Surface wave method for near-surface characterization: A tutorial. Near- Surface Geophysics, 165-185.10.3997/1873-0604.2004015Search in Google Scholar

[11] Rollins, K.M., Evans, M.D., Diehl, N.B., Daily, W.D. (1998b): Shear modulus and damping relationshipsfor gravels; J. Geotech. Geoenv. Eng., ASCE 124396-405.Search in Google Scholar

[12] Ohta,Y., Goto, N. (1978): Empirical shear wave velocity equations in terms of characteristics soil indexes. EarthqEngStructDyn 6(2) 167-187.10.1002/eqe.4290060205Search in Google Scholar

[13] Hanumantharao, C., Ramana, G.V. (2008): Dynamics soil properties for microzonation of Delhi, India. J. Earth Science, 117(2) 719-730.10.1007/s12040-008-0066-2Search in Google Scholar

[14] Terzaghi, K., Peck, R.B. (1967): “Soil Mechanics in Engineering Practice” 2nd edition, John Wiley and Sons, New York. 618p.Search in Google Scholar

[15] Borcherdt, R. D.(1994):“New development in estimating site response effect on ground motion” Proc. Seminar on New development in Earthquake Ground Motion Estimation and implications for Engineering Design Practice, Applied Technology Council, ATC 35(1) 101-144.Search in Google Scholar

Recommended articles from Trend MD

Plan your remote conference with Sciendo