Field testing methods for engineering geological investigations

Bell, F. G.; Cripps, J. C.; Culshaw, M. G.

doi:10.1144/gsl.eng.1990.006.01.01

Cited by 5 publications

(11 citation statements)

References 30 publications

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“…Generally, bearing capacity and compressibility calculations are based on the results of in situ cone standard penetration tests rather than rely on laboratory testing (Bell et al 1990). …”

Section: Boulders Cobbles and Gravelsmentioning

confidence: 99%

“…In most cases bearing capacity and settlement calculations are based on the results of either laboratory tests on recompacted disturbed samples or in situ standard penetration tests (Bell et al 1990). Clayton et al (1982) described various sophisticated sampling methods but pointed out that since these are expensive and difficult to perform, they are used only in studies in which the structure of the sediment is particularly important, for example in relation to liquefaction potential.…”

Section: Sandsmentioning

confidence: 99%

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Engineering geology of Quaternary soils: I. Processes and properties

Culshaw

Cripps

Bell

et al. 1991

EGSP

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“…Generally, bearing capacity and compressibility calculations are based on the results of in situ cone standard penetration tests rather than rely on laboratory testing (Bell et al 1990). …”

Section: Boulders Cobbles and Gravelsmentioning

confidence: 99%

Section: Sandsmentioning

confidence: 99%

Engineering geology of Quaternary soils: I. Processes and properties

Culshaw

Cripps

Bell

et al. 1991

EGSP

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“…Over the years, considering the limitations and deficiencies of laboratory testing and empirical methods, geotechnical engineers have developed many in-situ based techniques to measure more accurately design engineering parameters of soils and rocks. Bell et al (1990) specified that "field testing and, to a lesser extent, geophysical surveying are major sources of both qualitative and quantitative data relating to the ground conditions." Although field testing methods are more expensive in comparison with laboratory testing and also it is not possible to control boundary conditions such as drainage conditions and confining pressure that can be easily provided in laboratory testing, there are several important advantages of field testing.…”

Section: Field Testing Methodsmentioning

confidence: 99%

Field Testing

Ergüler¹

2017

Selective Neck Dissection for Oral Cancer

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In-situ testing Definition Field testing is a term used for all in-situ based methods and techniques that qualitatively and quantitatively determine physical, strength, deformability and hydromechanical properties of geomaterials in geotechnical site investigation. Geomaterials include rocks (igneous, metamorphic and sedimentary), soils and their complex, heterogeneous and anisotropic masses that consist of various components, fissures, flaws and other discontinuities at varying size scales.

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“…CPT soundings can be very effective in site characterization (Oyedele and Olorode 2010;Coker et al 2013;Coker 2015;Ayolabi et al 2012;Bell et al 1990).…”

Section: Introductionmentioning

confidence: 99%

An investigation into erosion induced highway structural failure along Ifon – Benin Highway, Southwestern Nigeria

Olumuyiwa¹,

Adekunle²

2020

Nipp J Environ Sci

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Geotechnical investigation was carried out at two failed segments along Ifon-Benin Highway, with the aim of determining cause, nature, and extent of the road failure. Eight in-situ cone penetration tests was carried out to a depth of about 20 m with a lateral spacing of 20 m. This was complemented by collection of eight soil samples at different depths within the failed segments and analyzed in the laboratory. The laboratory tests conducted were grain size analysis, Atterberg limit test, compaction test, California bearing ratio, undrained uncon ned triaxial test. The failure that existed in both locations are around the embankment, shoulder/edge and wearing course of the highway, due to ingression of water into the subgrade since the earth (natural soil) embankment structure had been eroded by rain water. The laboratory geotechnical results revealed that all the parameters could not meet up with the federal ministry of works and housing speci cation of Nigeria, with plasticity index greater than 20 %, % nes greater than 35 %, CBR values less than 80 % minimum recommended, shear strength parameters; angle of friction and cohesion are less than minimum of 30° and 50 kPa respectively. The CPT revealed predominant sandy silt to clayey silt topsoil and clay substratum with an inferred compressive strength of 20-40 KN/m 2. At both failed segments, the clayey substratum is seriously affected within the upper 6 m. The ingression of water into these foundation structures was due to compromise of the design/construction engineer, since a bridge was supposed to be erected across these two locations. Hence the stream channels across the highway were blocked by the earth-ll embankment. Therefore during wet season, pool of water that supposed to ow across the road through bridge system, continue to dissolve the embankment, and consequently in ltrate into the subgrade. This makes the highway to settle largely under tra c load. In addition, incessant heavy ooding around the embankment/shoulder of the highway might have induced the failure since a bridge was supposed to have been constructed across the two failed segments. This ooded water might have in ltrated into the pavement structural material leading to looseness, and less-cohesion of the layers which invariably reduces subgrade support and weakens various pavement layers.

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Field testing methods for engineering geological investigations

Cited by 5 publications

References 30 publications

Engineering geology of Quaternary soils: I. Processes and properties

Engineering geology of Quaternary soils: I. Processes and properties

Field Testing

An investigation into erosion induced highway structural failure along Ifon – Benin Highway, Southwestern Nigeria

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