Abstract
Based on a variety of case histories of site investigations, including extensive bore hole data, laboratory testing and geophysical prospecting at more than 550 construction sites, an empirical formulation is proposed for the rapid determination of allowable bearing pressure of shallow foundations in soils and rocks. The proposed expression corroborates consistently with the results of the classical theory and is proven to be rapid, and reliable. Plate load tests have been also carried out at three different sites, in order to further confirm the validity of the proposed method. It consists of only two soil parameters, namely, the in situ measured shear wave velocity and the unit weight. The unit weight may be also determined with sufficient accuracy, by means of other empirical expressions proposed, using P or S - wave velocities. It is indicated that once the shear and P-wave velocities are measured in situ by an appropriate geophysical survey, the allowable bearing pressure as well as the coefficient of subgrade reaction and many other elasticity parameters may be determined rapidly and reliably.
Highlights
Based on a variety of case histories of site investigations, including extensive bore hole data, laboratory testing and geophysical prospecting at more than 550 construction sites, an empirical formulation is proposed for the rapid determination of allowable bearing pressure of shallow foundations in soils and rocks
Plate load tests have been carried out at three different sites, in order to further confirm the validity of the proposed method. It consists of only two soil parameters, namely, the in situ measured shear wave velocity and the unit weight
The unit weight may be determined with sufficient accuracy, by means of other empirical expressions proposed, using P or S - wave velocities
Summary
The P-wave velocities, for instance, have been used to determine the unconfined compressive strengths and modulus of elasticity of soil samples by Coates & Terasaki, A., 1976) supplied various expressions relating the seismic wave velocities to weight density, permeability, water content, unconfined compressive strength and modulus of elasticity. & Yoshimura, M., 1976) proposed an empirical expression for the determination of bearing capacity qf and / or qa as ISSN 1927-0542 E-ISSN 1927-0550 www.ccsenet.org/esr. M, Setto, I., & El-Werr, A., 1992), for the ultimate bearing capacity of soils, using the logarithm of shear wave velocity. S., Ozdemir, Z., & Keceli, A., 2006), based on extensive case studies, supplied explicit expressions for the allowable bearing pressure, using shear wave velocity. A., 2001), Uyanik (Uyanik, O., 2010; Uyanik, O., 2011)
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