Evaluation of Allowable Bearing Capacity of Ayila Soil, South-West Nigeria
No Thumbnail Available
Date
2019
Authors
Ozebo, V.C.
Ikuemonisan, F.E
Journal Title
Journal ISSN
Volume Title
Publisher
JASEM, University of Porthacourt, Nigeria
Abstract
Accurate determination of allowable bearing capacity of soil is key to geotechnical foundations
design so as to prevent collapse of structures built on them. Allowable bearing capacity of the study location has been
determined by shear wave velocity approach. The seismic data used in this study are the in-situ shear and
compressional wave velocities values measured by a 12-channel signal enhancement seismograph. Three layers were
detected by the method. Empirical formulations and mathematical relationship between seismic velocities and elastic
parameters were used to evaluate the allowable bearing capacity and other parameters presented in Table 1. Results
show that allowable bearing capacity for layer 1 ranges from 123.56 to 173.54kN/m2. Layer 2 ranges from 233.24 to
377.62kN/m2, while layer 3 ranges from 437.62 – 616kN/m2. It was observed that allowable bearing capacity increases
with depth – a 13% difference between layers 1 and 2 while between layer 2 and 3 there is a 22% difference. By
comparison, the allowable bearing capacities evaluated in this study are in agreement with empirical values of
allowable bearing capacity of soils proposed by other scholars. Findings show the study location is suitable for
geotechnical foundation designs.
Description
Keywords
Ayila, Shear wave velocity, Allowable bearing capacity, Coefficient of subgrade reaction