Allowable Bearing Pressure in Soils and Rocks through Seismic Wave Velocities

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.

Multicriteria Evaluation of Building Foundation Alternatives

“…The foundation types are usually chosen based on the designers’ and builders’ opinions and experience, regardless of the specific engineering‐geological conditions and features of the house structure (Mangushev, ; Sušinskas et al., ). When selecting a type of foundation, it is necessary to take into account engineering‐geological conditions, climate impact, ground water levels, specific features of the structure, and builder's technological capabilities (Oloufa and Ikeda, ; Lepre et al., ; Tezcan and Ozdemir, ). Usually, the installation cost, materials, the excavated soil, the equipment used, etc.…”

Uncertainty in a Geophysical Survey for a Bridge Foundation Design

“…Further, empirical studies have related seismic velocities to geotechnical properties of interest. A relevant example would be bearing capacity (Tezcan and Ozdemir 2012) , and (Kaptan 2012). The expectation is that large seismic velocities correlate with large bearing capacity.…”

Análise comparativa da execução de fundações do tipo hélice contínua e pré-moldada de concreto na construção de tanques de combustível de uma distribuidora de petróleo: estudo de caso na Amazônia brasileira

“…Para a escolha do tipo de fundação adequada, deve-se considerar também o tipo de solo presente no local, as condições geológicas da região, impacto climático, níveis de água subterrânea, entre outras características específicas do local da obra (Oloufa & Ikeda, 1995;Santos, Rocha, & Lepre, 2010;Tezcan & Ozdemir, 2012). Neste contexto, destacam-se características da formação geológica do subsolo da cidade do estudo de caso, Belém do Pará, que conta com a presença predominante de argila mole e muito mole com material orgânico, em que há camadas intercaladas com outros solos de maior resistência do tipo arenoso, siltoso ou misto.…”