Estimation of probabilistic CPT-based soil profile using an unsupervised Gaussian mixture model

Shakir, Ressol R.; Wang, Hui

doi:10.1007/s12517-023-11283-7

Cited by 2 publications

(4 citation statements)

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“…The soil in this region is a floodplain formation consisting of clay, silt, and sand, where the silt forms 60% of the deposits. The silt soil and sand settle in the swamps, the mud runs below the Shatt al-Arab, and one million tons of sediments are dried up annually (12,000 years) in these rivers that flow from the northwest to the southeast of Turkey through this basin [9][10][11]. The soil in this region's shallow depth belongs to the Holocene epoch.…”

Section: Geology Of the Sitementioning

confidence: 99%

“…Figure 3B shows the results of C u estimated based on SPTN, according to Decourt (1990). Number of cohesion values used at various depths vary, for example at depths of (1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,22,23,24,25) The collected data were presented in histograms to be more reliable and to provide a means to reduce the high uncertainty. It is noted in Figure 4 that 95% of the cohesion rate in most projects ranges from (50-150) kPa, which was estimated through the equations of the corrected values for SPT N according to Decourt [17].…”

Section: Previous Knowledgementioning

confidence: 99%

“…The probability distribution of C u shown in figure 6. Utilizing the probability distribution of the measured data and prior knowledge, the µ and σ of the posterior probability distribution were obtained using the two equations (11,12). It was developed using MATLAB code to represent the probability distribution, the prior distribution, and the posterior probability distribution to evaluate soil parameters represented by cohesion.…”

Section: Ordinary Normal Distribution (With Known Variance)mentioning

confidence: 99%

“…Figure3Bshows the results of C u estimated based on SPTN, according toDecourt (1990). Number of cohesion values used at various depths vary, for example at depths of(1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,22,23,24,25) m the number of calculated values of cohesion were respectively (2, 5, 9, 4, 7, 7, 7, 4, 11, 1, 5, 7, 5, 1, 10, 5, 3, 4, 4, 4, 2, 4, 2, 3).…”

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Uncertainty Characterization for Soil Cohesion in a Project Site in Nasiriyah Using Bayesian Methods

Abd Al-Haleem,

Shakir

2023

E3S Web Conf.

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High uncertainties arias through the characterization of soil parameters because of the lack of data obtained from geotechnical reports. Reducing these uncertainties may improve the characteristic values of soil parameters. This research aims to probabilistically characterize a soil's cohesion parameter in Nasiriyah. The Bayesian approach has been applied to soil data obtained through a project in Nasiriyah. The soil at the site is classified as lean clay, and the soil cohesion has been evaluated using two Bayesian methods: the ordinary, normal distribution method (OND) and the Marcove Chain Monte Carlo-based Bayesian approach (MCMC) method. The previous knowledge utilized in the Bayesian approach was based on 20 boreholes, and the subjective probability approach has functioned in the prior probability distribution. The OND method deduced a mean value of cohesion of (195.9 kPa) and a standard deviation of (14.68 kPa), (COV) 7.49%. It was noted that the probability distribution has a more significant effect than the previous distribution on the posterior distribution. The MCMC method summarized the probabilistic description of the soil characteristic, through which it reached the mean and the subsequent standard deviation (167.49) kPa (109.8) kPa, respectively, and the coefficient of Variation (COV) was 65.6%. It is considered the most appropriate and common method, especially in high-dimensional data when the results are not well known because it can provide a probabilistic value for the not well-known data.

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Section: Geology Of the Sitementioning

confidence: 99%

Section: Previous Knowledgementioning

confidence: 99%

Section: Ordinary Normal Distribution (With Known Variance)mentioning

confidence: 99%

“…Figure3Bshows the results of C u estimated based on SPTN, according toDecourt (1990). Number of cohesion values used at various depths vary, for example at depths of(1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,22,23,24,25) m the number of calculated values of cohesion were respectively (2, 5, 9, 4, 7, 7, 7, 4, 11, 1, 5, 7, 5, 1, 10, 5, 3, 4, 4, 4, 2, 4, 2, 3).…”

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