Assessment of undrained shear strength based on Cone Penetration Test (CPT) for clayey soils

Shin, Younghak; Kim, Daehyeon

doi:10.1007/s12205-011-0808-6

Cited by 12 publications

(3 citation statements)

References 11 publications

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“…Currently, the standard CPT is regarded as an easy, rapid and relatively economical field test method to investigate the geotechnical properties of soils (Shin and Kim 2011). Many correlations have been proposed for the determination of engineering properties of saturated soils from CPT results.…”

Section: Discussionmentioning

confidence: 99%

Studying the effect of drying on soil hydro-mechanical properties using micro-penetration method

Tang

Shi

2016

Environ Earth Sci

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Understanding the hydro-mechanical response of soil during drying is significant for predicting and preventing the possible disasters related to drought climate. In this investigation, a novel micro-penetrometer was developed to characterize and quantify the drought-induced soil hydro-mechanical response based on the penetration curves, which present the variation of soil strength along depth. The relationships between the penetration resistance and soil water content, and the penetration resistance and soil suction were initially calibrated. It is found that the penetration resistance increases exponentially with decreasing water content as the soil is subjected to drying, while increases linearly with increasing suction. Before the air-entry value is reached, the drying-induced increment of soil strength is insignificant even a large amount of water is evaporated. During this stage, soil strength and water content along depth are generally uniform, and the increment of soil strength is consistent at any depth. After the air-entry value is reached, soil strength increases rapidly even water content decreases slightly. The distribution of soil strength along depth becomes non-uniform. It generally decreases exponentially with increasing depth due to the drying-induced water content and suction gradient. The predicted water content profile based on the penetration results was compared with the measured one, and good agreement was observed. It indicates that the proposed micro-penetration test can be used to characterize the hydro-mechanical response of soil during drying.

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Section: Discussionmentioning

confidence: 99%

Studying the effect of drying on soil hydro-mechanical properties using micro-penetration method

Tang

Shi

2016

Environ Earth Sci

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“…Available alternative options are as follows [4,5] : (a) set blind ditch; (b) make landscape modeling be hanging; (c) install concealed drain catheters; (d) set hidden water guide grooves is showed in Fig1.…”

Section: Technology Programs To Eliminate Water Seepage Pollution Of ...mentioning

confidence: 99%

Solutions and Engineering Examples for Water Seepage Pollution of Retaining Wall

Pan

2014

AMM

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Drain hole is a important structural measure in retaining wall constructions The necessity of retaining wall drainage holes and its side effects were discussed in the paper. A solution is proposed to deal with water seepage pollution with the use of leading channel, which is demonstrated in some practical project. The project shows that dark tank to guide water is characteristiced with low cost, short construction period and reliable effect, which is worthy of reference in other similar projects.

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“…When considering the plasticity index of the soil [17], the estimated undrained shear strength values obtained from CPTU are usually very close to laboratory experiment results. Nevertheless, the correlation between cone factors and the plasticity index is only valid for specific soil conditions in certain regions [18,19]. In addition, cone factors are also related to the over-consolidation ratio [20], natural moisture content [21], and fines content [22] of the soil.…”

Section: Introductionmentioning

confidence: 99%

A Novel Method for Estimating the Undrained Shear Strength of Marine Soil Based on CPTU Tests

Fu,

Shen,

Jia

et al. 2024

JMSE

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The undrained shear strength is an essential parameter in the foundation design of marine structures. Due to the complex marine environment and technical limitations, it is difficult and costly to obtain offshore samples. Piezocone penetration tests (CPTU) are relatively low-cost compared to drilling and sampling methods. Therefore, based on the soil behavior type index (Ic) derived from CPTU results, a model for estimating cone factors (Nkt, Nke) is proposed to improve the accuracy of estimation of undrained shear strength. The result shows that the soil behavior type index (Ic) and cone factors take on a negatively correlated exponential relation. Incorporating a cone factor that varies with the soil behavior type index (Ic) significantly enhances the accuracy of undrained shear strength predictions compared to the conventional method of using a constant cone factor. This approach reduces the root mean square error (RMSE) for Nkt (Nke) from 0.124 (0.126) MPa to 0.056 (0.06) MPa, and the mean absolute error (MAE) from 0.0154 (0.016) MPa to 0.0032 (0.0036) MPa. The method was validated at an additional location and the predictions were in high agreement with the results of the consolidated quick direct shear test. The developed method can serve as an effective tool used in the design of foundations of marine structures.

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Assessment of undrained shear strength based on Cone Penetration Test (CPT) for clayey soils

Cited by 12 publications

References 11 publications

Studying the effect of drying on soil hydro-mechanical properties using micro-penetration method

Studying the effect of drying on soil hydro-mechanical properties using micro-penetration method

Solutions and Engineering Examples for Water Seepage Pollution of Retaining Wall

A Novel Method for Estimating the Undrained Shear Strength of Marine Soil Based on CPTU Tests

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