Estimating Menard pressuremeter modulus and limit pressure from SPT in silty sand and silty clay soils. A case study in Mashhad, Iran

Cheshomi, Akbar; Ghodrati, Mohammad Reza

doi:10.1080/17486025.2014.933894

Cited by 25 publications

(14 citation statements)

References 8 publications

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“…The equations proposed by Bozbey and Togrol [8] were based on the results of SPTs and PMTs conducted on the medium to very dense sandy soils with SPT-N 60 ≤ 100 and also underestimate the PMT results for the weathered granite examined in the present study. However, Cheshomi and Ghodrati [9] obtained their empirical equations based on data for dense to very dense silty sands (SPT-N 60 < 50), with the predictions of E m for weathered granite comparable to those of the present corresponding equation; however, their predicted P L are higher than those obtained in the presented study. Regarding the similarity for E m , the E m values for the specific samples used by Cheshomi and Ghodrati [9], where SPT-N 60 ≥ 35, were approximately 30% larger than those for the samples used by Bozbey and Togrol [8].…”

Section: Discussionsupporting

confidence: 54%

“…However, Cheshomi and Ghodrati [9] obtained their empirical equations based on data for dense to very dense silty sands (SPT-N 60 < 50), with the predictions of E m for weathered granite comparable to those of the present corresponding equation; however, their predicted P L are higher than those obtained in the presented study. Regarding the similarity for E m , the E m values for the specific samples used by Cheshomi and Ghodrati [9], where SPT-N 60 ≥ 35, were approximately 30% larger than those for the samples used by Bozbey and Togrol [8]. Therefore, a local correlation based on the local rock characteristics is important for predicting the engineering properties of geo-materials.…”

Section: Discussionsupporting

confidence: 54%

“…Yagiz et al [7] proposed linear relationships between N and E m and between N and P L based on the results of a test conducted in sandy silty clay developed at a shallow depth (within 2 m) in Denizli, Turkey. Bozbey and Togrol [8] proposed nonlinear relationships between the same parameters for sandy soil and clayey soil using the results of tests conducted in Istanbul, Turkey, while Cheshomi and Ghodrati [9] did the same for silty sand and silty clay based on SPTs and PMTs conducted in Mashhad, Iran. However, most of these previous studies dealt with soils with SPT-N values of ≤50; none considered weathered granite with an N value of ≥50.…”

Section: Introductionmentioning

confidence: 99%

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Estimation of Pressuremeter Modulus and Limit Pressure in Weathered Granite Based on the SPT-N Value and Chemical Weathering Index: A Case Study in South Korea

2021

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A pressuremeter test (PMT) is a representative and highly reliable in situ test for assessing the stress–strain behavior of weathered granite. Its application, however, is restricted by its cost and time requirements. Many researchers have also investigated the correlations between the SPT-N value and the pressuremeter modulus (Em) and limit pressure (PL) of soils, but they have mostly focused on sand, silt, and clay and have employed simple regression analysis. In this study, equations for Em and PL were derived for weathered granite through multiple nonlinear regression analyses using a chemical weathering index that quantitatively represents the degree of weathering. Nonlinear multiple regression analyses were conducted by combining the allometric models that produced the optimal correlations between Em, PL, energy corrected SPT-N (SPT-N60), and normalized VR (Vogt’ ratio) with vertical effective stress. The obtained equations for Em and PL had higher R2 values (0.76 and 0.46, respectively) compared with the simple regression equations reported in previous studies. Because local characteristics are important determinants of the engineering properties of geo-materials, the Em and PL equations proposed in this paper are intended for use in geotechnical surveys of weathered granite in South Korea.

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Section: Discussionsupporting

confidence: 54%

Section: Discussionsupporting

confidence: 54%

Section: Introductionmentioning

confidence: 99%

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Estimation of Pressuremeter Modulus and Limit Pressure in Weathered Granite Based on the SPT-N Value and Chemical Weathering Index: A Case Study in South Korea

2021

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“…where b = 2-8 for gravely sand = 2-20 for clayey sand Cheshomi & Ghodrati (2015) presented correlations for silty sand and silty clay soil from the case study in Iran (38 tests for silty clay soil and 16 tests for silty sand soil), given by Equation 10 and 11. These correlations are valid only for the range of NSPT measured in site (i.e.…”

Section: Previous Spt-n -Pmt Correlationsmentioning

confidence: 99%

“…Pressuremeter test is a relatively expensive and can generate useful information about the strength and deformation properties of any soil and weak rock, which is carried out in some projects. On the other hand, the SPT test is a rather inexpensive, simple and typical in situ test used to determine the engineering properties of silt, clay, sand, and fine gravel which is utilised in almost all projects (Cheshomi & Ghodrati, 2015).…”

Section: Introductionmentioning

confidence: 99%

Correlation between PMT and SPT results for Kenny Hill Formation

Zaki¹,

Ismail²,

Govindasamy³

et al. 2019

BGSM

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The utilization and simplicity of standard penetration test (SPT) gives major advantages in site investigation over other methods. SPT is widely practised for all sizes of project and feasible to be used in low-cost construction. However, SPT does not comprehensively capture the real soil behaviour and inevitably generate disturbance to soil samples. Considering that SPT is available for every site investigation works, it was tempting to develop correlation between the pressuremeter test (PMT) results and the SPT results, particularly for local practise. PMT is normally adopted to determine the in-situ stress-strain characteristic, horizontal pressure and lateral failure load of soil. This method is considered as undisturbed soil test due to its mechanism that directly tested the soil. Kenny Hill Formation has thick layer of residual soil due to intense weathering process in the tropical climate region. Thus, adopting the local correlations is more efficient to represent the geological formation of the site. In this research study, the approach is to develop correlation between SPT and PMT. The standard penetration test (SPT) value was obtained from a soil exploration study conducted in Kenny Hills Formation, Malaysia which was conducted at selected depths of borehole. Correlation of SPT value (N SPT) and PMT initial modulus (E i) is E i = 0.22 (N SPT) + 10.01 with coefficient of determination (R 2) 0.642.

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An approach for determining the relationship between the parameters of pressuremeter and SPT in different consistency clays in Eastern Turkey

Özvan

Akkaya

Tapan

2017

Bull Eng Geol Environ

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Estimating Menard pressuremeter modulus and limit pressure from SPT in silty sand and silty clay soils. A case study in Mashhad, Iran

Cited by 25 publications

References 8 publications

Estimation of Pressuremeter Modulus and Limit Pressure in Weathered Granite Based on the SPT-N Value and Chemical Weathering Index: A Case Study in South Korea

Estimation of Pressuremeter Modulus and Limit Pressure in Weathered Granite Based on the SPT-N Value and Chemical Weathering Index: A Case Study in South Korea

Correlation between PMT and SPT results for Kenny Hill Formation

An approach for determining the relationship between the parameters of pressuremeter and SPT in different consistency clays in Eastern Turkey

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