A novel PSO-KELM based soil liquefaction potential evaluation system using CPT and Vs measurements

Use of Seed’s simplified liquefaction evaluation method, combined with the dynamic triaxial test results, and the wave velocity of site liquefaction, to evaluate liquefaction potential of the three typical loess sites under the action of different seismic magnitudes, and calculate the boundary depth of the liquefaction site. Moreover, give the corresponding relationship between the typical loess site liquefaction boundary depth and shear wave velocity, and get the critical shear wave velocity of typical loess liquefaction site. The results of the study show that, (1) saturated loess site could be liquefied under the action of a certain intensity earthquake. (2) saturated soil layers which do not produce liquefied under the action of 6.5 degree earthquake，its critical shear wave velocity is about 200 m/s, and under the action of 7 degree earthquake its critical shear wave velocity is about 303 m/s, under the action of 8 degree earthquake its critical shear wave velocity is about 368 m/s. This conclusion enriches and develops the basis of liquefaction potential evaluation in the loess region.

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Soil liquefaction potential evaluation – An update of the HBF method focusing on research and practice in Taiwan

Engineering Geology ◽

10.1016/j.enggeo.2020.105926 ◽

2021 ◽

Vol 280 ◽

pp. 105926

Author(s):

Jin-Hung Hwang ◽

Sara Khoshnevisan ◽

C. Hsein Juang ◽

Chih-Chieh Lu

Keyword(s):

Soil Liquefaction ◽

Liquefaction Potential ◽

Research And Practice ◽

Potential Evaluation

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Predicting the liquefaction potential of soil layers in Tabriz city via artificial neural network analysis

SN Applied Sciences ◽

10.1007/s42452-021-04704-3 ◽

2021 ◽

Vol 3 (7) ◽

Author(s):

Mohammad Alizadeh Mansouri ◽

Rouzbeh Dabiri

Keyword(s):

Neural Network ◽

Artificial Neural Network ◽

Soil Liquefaction ◽

Data Sets ◽

Liquefaction Potential ◽

Advantages And Disadvantages ◽

Artificial Neural ◽

Artificial Neural Network Ann ◽

Prediction Approach ◽

Empirical Approaches

AbstractSoil liquefaction is a phenomenon through which saturated soil completely loses its strength and hardness and behaves the same as a liquid due to the severe stress it entails. This stress can be caused by earthquakes or sudden changes in soil stress conditions. Many empirical approaches have been proposed for predicting the potential of liquefaction, each of which includes advantages and disadvantages. In this paper, a novel prediction approach is proposed based on an artificial neural network (ANN) to adequately predict the potential of liquefaction in a specific range of soil properties. To this end, a whole set of 100 soil data is collected to calculate the potential of liquefaction via empirical approaches in Tabriz, Iran. Then, the results of the empirical approaches are utilized for data training in an ANN, which is considered as an option to predict liquefaction for the first time in Tabriz. The achieved configuration of the ANN is utilized to predict the liquefaction of 10 other data sets for validation purposes. According to the obtained results, a well-trained ANN is capable of predicting the liquefaction potential through error values of less than 5%, which represents the reliability of the proposed approach.

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The use of MASW method in the assessment of soil liquefaction potential

Soil Dynamics and Earthquake Engineering ◽

10.1016/j.soildyn.2004.06.012 ◽

2004 ◽

Vol 24 (9-10) ◽

pp. 689-698 ◽

Cited By ~ 53

Author(s):

Chih-Ping Lin ◽

Cheng-Chou Chang ◽

Tzong-Sheng Chang

Keyword(s):

Soil Liquefaction ◽

Liquefaction Potential ◽

Masw Method

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Soil Liquefaction Evaluation of Offshore Site Based on In Situ Shear Wave Velocity Measurements

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.405-408.470 ◽

2013 ◽

Vol 405-408 ◽

pp. 470-473

Author(s):

Sheng Jie Di ◽

Ming Yuan Wang ◽

Zhi Gang Shan ◽

Hai Bo Jia

Keyword(s):

Shear Wave ◽

Wave Velocity ◽

Shear Wave Velocity ◽

Wind Farm ◽

Soil Liquefaction ◽

Offshore Wind ◽

Velocity Measurements ◽

Liquefaction Resistance ◽

Liquefaction Potential

A procedure for evaluating liquefaction resistance of soils based on the shear wave velocity measurements is outlined in the paper. The procedure follows the general formal of the Seed-Idriss simplified procedure. In addition, it was developed following suggestions from industry, researchers, and practitioners. The procedure correctly predicts moderate to high liquefaction potential for over 95% of the liquefaction case histories. The case study for the site of offshore wind farm in Jiangsu province is provided to illustrate the application of the proposed procedure. The feature of the soils and the shear wave velocity in-situ tested in site are discussed and the liquefaction potential of the layer is evaluated. The application shows that the layers of the non-cohesive soils in the depths 3-11m may be liquefiable according to the procedure.

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CPT-Based Probabilistic and Deterministic Assessment of In Situ Seismic Soil Liquefaction Potential

Journal of Geotechnical and Geoenvironmental Engineering ◽

10.1061/(asce)1090-0241(2006)132:8(1032) ◽

2006 ◽

Vol 132 (8) ◽

pp. 1032-1051 ◽

Cited By ~ 207

Author(s):

R. E. Moss ◽

R. B. Seed ◽

R. E. Kayen ◽

J. P. Stewart ◽

A. Der Kiureghian ◽

...

Keyword(s):

Soil Liquefaction ◽

Liquefaction Potential

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Prediction of liquefaction potential and pore water pressure beneath machine foundations

Open Engineering ◽

10.2478/s13531-013-0165-y ◽

2014 ◽

Vol 4 (3) ◽

Cited By ~ 3

Author(s):

Mohammed Fattah ◽

Mohammed Al-Neami ◽

Nora Jajjawi

Keyword(s):

Pore Water ◽

Sandy Soil ◽

Pore Water Pressure ◽

Water Pressure ◽

Soil Liquefaction ◽

Elastic Model ◽

Liquefaction Resistance ◽

Overburden Pressure ◽

Liquefaction Potential ◽

Frequency Changes

AbstractThe present research is concerned with predicting liquefaction potential and pore water pressure under the dynamic loading on fully saturated sandy soil using the finite element method by QUAKE/W computer program. As a case study, machine foundations on fully saturated sandy soil in different cases of soil densification (loose, medium and dense sand) are analyzed. Harmonic loading is used in a parametric study to investigate the effect of several parameters including: the amplitude frequency of the dynamic load. The equivalent linear elastic model is adopted to model the soil behaviour and eight node isoparametric elements are used to model the soil. Emphasis was made on zones at which liquefaction takes place, the pore water pressure and vertical displacements develop during liquefaction. The results showed that liquefaction and deformation develop fast with the increase of loading amplitude and frequency. Liquefaction zones increase with the increase of load frequency and amplitude. Tracing the propagation of liquefaction zones, one can notice that, liquefaction occurs first near the loading end and then develops faraway. The soil overburden pressure affects the soil liquefaction resistance at large depths. The liquefaction resistance and time for initial liquefaction increase with increasing depths. When the frequency changes from 5 to 10 rad/sec. (approximately from static to dynamic), the response in displacement and pore water pressure is very pronounced. This can be attributed to inertia effects. Further increase of frequency leads to smaller effect on displacement and pore water pressure. When the frequency is low; 5, 10 and 25 rad/sec., the oscillation of the displacement ends within the period of load application 60 sec., while when ω = 50 rad/sec., oscillation continues after this period.

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