Estimation and Separation of Preconsolidation Stress Using Triaxial,- and Oedometer Test in Kiscelli Clay

Józsa, Vendel

doi:10.3311/ppci.9068

Cited by 6 publications

(4 citation statements)

References 4 publications

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“…Many researchers have studied AGF and its effects on soil properties and mechanical behavior of frozen soils [20][21][22][23][24][25][26][27][28][29]. However, compared with unfrozen soils a greater effort is required to study frozen soils [30][31][32][33]. A mine shaft project near Swansea in South Wales is the first recorded application of AGF in 1862 [7].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of the Mechanical Behavior of Frozen Soils - A Case Study of Tabriz Subway

Esmaeili‐Falak

Katebi

2017

Period. Polytech. Civil Eng.

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The mechanical properties of frozen ground are key parameters in design and implementation of artificial ground freezing (AGF) in underground projects. Soil samples were obtained from the urban underground railway project site in Tabriz, Iran. The specimens were classified as SP and CL according to the USCS. The specimens were remolded in accordance with the site conditions. Over 120 triaxial compression tests were conducted on the frozen samples at different temperatures, confining pressures and strain rates. The results show that the frozen SP and CL soils exhibit strain-softening and strain-hardening behaviour, respectively. In all cases, Young's modulus increases with decreasing temperature and increasing strain rate and confining pressure. Also, the shear strength increases with decreasing temperature and increasing strain rate. In all tests, the Young's modulus and shear strength of the SP soil are greater than the CL soil. Based on the results of this research, the application of artificial ground freezing was recommended for coarse-grained and non-cohesive soils like SP in the Tabriz underground railway project.

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Section: Introductionmentioning

confidence: 99%

Experimental Study of the Mechanical Behavior of Frozen Soils - A Case Study of Tabriz Subway

Esmaeili‐Falak

Katebi

2017

Period. Polytech. Civil Eng.

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“…However, the obtained results would not correspond to the exact values of the in situ pressuremeter parameters or the SPT blow counts. The parameters calculated with these empirical equations could be used to obtain advance information about soil conditions (see also [61]).…”

Section: Discussionmentioning

confidence: 99%

“…In the second step of the regression analysis, the moisture contents (w%) were added to the equations as a second variable with N 60 values, which resulted in a better performance relative to the first step of the statistical analysis. In the third step, the plasticity index (PI %) values were also added in the equations, and empirical equations estimating pressuremeter parameters from N 60 values, moisture content (w, %) and the plasticity index (PI,%) were developed and non-linear multiple empirical equations with high regression coefficients extracted (Table 3) [11,49,[61][62][63].…”

Section: Introductionmentioning

confidence: 99%

Simple and Non-Linear Regression Techniques Used in Sandy-Clayey Soils to Predict the Pressuremeter Modulus and Limit Pressure: A Case Study of Tabriz Subway

Narimani¹,

Chakeri²,

Davarpanah³

2018

Period. Polytech. Civil Eng.

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Nowadays, some common field tests consist of SPT test and pressuremeter test are performed in investigating the geotechnical parameters of projects such as tunneling. Due to the high cost of pressuremter test performance and its time-consuming procedure, using some empirical relations between SPT and Pressuremeter tests are recommended for primarily study of the project. The purpose of this study is to perform regression analyses between the NSPT and the uniaxial compression strength test and the pressuremeter test parameters obtained from a geotechnical investigation performed in route of 2nd line of Tabriz metro. Correlations were carried out for sandy and clayey soils separately. A series of simple and nonlinear multiple regression analyses are performed and as a result of analyses, several empirical equations are developed. It is shown that the empirical equations developed in this study are statistically acceptable.

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“…In the HSS soil model this might be realized by providing the OCR (over-consolidation ratio) or POP (pre-overburden pressure) stress, the latter of which is also known as OCD (over-consolidation difference). The modeling of the load test was completed by providing the OCR values, which were available from the laboratory test results published by Józsa [3] regarding the over-consolidation. The soil samples were taken of the boreholes deepened for metro line M4.…”

Section: Fig 6 -Model Of O-cellmentioning

confidence: 99%

Back Analysis of Osterberg-Cell Pile Load Test by Means of Three-Dimensional Geotechnical Modeling

Kanizsár

2021

CEJ

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In 3D geotechnical modelling it is essential for the realistic simulation of soil behavior that the parameters of the hardening soil with small strain constitutive model are specified appropriately. The possibility of deriving these parameters for very stiff cohesive soils similar to the so called Kiscell clay that has a significant role in deep construction projects in Budapest, from laboratory and field tests is rather limited. The results of the pile load test completed for the MOL Campus high-rise building project proved to be useful data source. The article presents the circumstances of the quoted Osterberg-cell pile load tests and the modelling of the pile performed by the above-mentioned soil model. The parameters specified on the basis of laboratory tests - and in absence of those based on literature - data can be fine-tuned by approaching the load test results.

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Estimation and Separation of Preconsolidation Stress Using Triaxial,- and Oedometer Test in Kiscelli Clay

Abstract: The study is about the estimation of preconsolidation stress using a correlation method.

Cited by 6 publications

References 4 publications

Experimental Study of the Mechanical Behavior of Frozen Soils - A Case Study of Tabriz Subway

Experimental Study of the Mechanical Behavior of Frozen Soils - A Case Study of Tabriz Subway

Simple and Non-Linear Regression Techniques Used in Sandy-Clayey Soils to Predict the Pressuremeter Modulus and Limit Pressure: A Case Study of Tabriz Subway

Back Analysis of Osterberg-Cell Pile Load Test by Means of Three-Dimensional Geotechnical Modeling

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