Investigation to determine the vulnerability of reclaimed land to building collapse using near surface geophysical method
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Adequate knowledge of the geology and the structures of the subsurface would
assist engineers in the best way to carry out constructions to avoid building collapse. In this
study, near surface seismic refraction method was used to determine the geotechnical
parameters of the subsurface, the results obtained were correlated with the result of borehole
data drilled in the study area. The results of seismic refraction method delineated mostly two
distinct layers with the first layer having the lower geotechnical parameters. It was observed
that in the first layer, the Young’s modulus ranged from 0.168 to 0.458 GPa , shear modulus
ranged between 0.068 and 0.185 GPa, the bulk modulus ranged between 0.106 and 0.287 GPa
while the bearing capacity ranged from 0.083 to 0.139 MPa. On the other hand, in the second
layer, the Young’s modulus ranged between 3.717 and 7.018 GPa, shear modulus ranged from
1.500 to 2.830 GPa while the bulk modulus ranged from 2.383 to 4.449 GPa. Significantly, the
formation of the second layer appeared to be more competent than the first layer, therefore
engineering construction in this geological setting is recommended to be founded on the second
layer at depth ranging between 7 and 16 m.
Keywords
Q Science (General), QC Physics