Reliability Analysis of Soil Liquefaction Potential

2005 ◽  
Author(s):  
C. Hsein Juang ◽  
Sunny Ye Fang ◽  
David Kun Li
Keyword(s):  
Reliability Analysis ◽  
Soil Liquefaction ◽  
Liquefaction Potential

Reliability Analysis of Liquefaction for Some Regions of Bihar

2018 ◽  
Vol 9 (2) ◽  
pp. 23-37
Author(s):  
Sujeet Kumar Umar ◽  
Pijush Samui ◽  
Sunita Kumari
Keyword(s):  
Reliability Analysis ◽  
Soil Liquefaction ◽  
Liquefaction Potential ◽  
First Order ◽  
Seismic Liquefaction ◽  
Method Factor ◽  
First Order Second Moment ◽  
Assessment Measures ◽  
Bihar State ◽  
Liquefaction Assessment

There are many deterministic and probabilistic liquefaction assessment measures to classify if soil liquefaction will take place or not. Different approaches give dissimilar safety factor and liquefaction probabilities. So, reliability analysis is required to deal with these different uncertainties. This paper describes a reliability technique for predicting the seismic liquefaction potential of soils of some areas at Bihar State. Here a reliability approach has been presented in order to find the probability of liquefaction. The proposed approach is formulated on the basis of the results of reliability analyses of 234 field data. Using a deterministic simplified Idriss and Boulanger method, factor of safety of soil has been accessed. The reliability index as well as corresponding probability of liquefaction has been determined based on a First Order Second Moment (FOSM) method. The developed method can be used as a robust tool for engineers concerned in the estimation of liquefaction potential.

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

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.

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

2004 ◽  
Vol 24 (9-10) ◽  
pp. 689-698 ◽  
Author(s):  
Chih-Ping Lin ◽  
Cheng-Chou Chang ◽  
Tzong-Sheng Chang
Keyword(s):  
Soil Liquefaction ◽  
Liquefaction Potential ◽  
Masw Method

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

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.

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

2006 ◽  
Vol 132 (8) ◽  
pp. 1032-1051 ◽  
Author(s):  
R. E. Moss ◽  
R. B. Seed ◽  
R. E. Kayen ◽  
J. P. Stewart ◽  
A. Der Kiureghian ◽  
...  
Keyword(s):  
Soil Liquefaction ◽  
Liquefaction Potential

Prediction of liquefaction potential and pore water pressure beneath machine foundations

2014 ◽  
Vol 4 (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.

scholarly journals Standard Penetration Tests and Soil Liquefaction Potential Evaluation

1980 ◽  
Vol 20 (4) ◽  
pp. 95-111 ◽  
Author(s):  
Fumio Tatsuoka ◽  
Toshio Iwasaki ◽  
Ken-Ichi Tokida ◽  
Susumu Yasuda ◽  
Makoto Hirose ◽  
...  
Keyword(s):  
Soil Liquefaction ◽  
Liquefaction Potential ◽  
Potential Evaluation ◽  
Penetration Tests

Estimation of Suitable Groundwater Safe Yield under the Unusually Constraints of Environmental Conditions in Taipei Basin, Taiwan

2012 ◽  
Vol 212-213 ◽  
pp. 399-406
Author(s):  
C.H. Lee ◽  
Kuan Wei Chen ◽  
Jung Nan Chang ◽  
Wei Ping Chen ◽  
Jung Wei Chen
Keyword(s):  
Land Subsidence ◽  
Groundwater Level ◽  
Environmental Conditions ◽  
Three Dimensional ◽  
Soil Liquefaction ◽  
High Potential ◽  
Liquefaction Potential ◽  
Safe Yield ◽  
Taipei Basin ◽  
Groundwater Management Model

The Taipei Basin in Taiwan is an extremely special case under the constraints of environmental conditions. Pumping of groundwater in the basin was banned in 1968 due to the land subsidence. Since then, groundwater level in the Taipei basin has risen over the years and the land subsidence has also stopped. However, due to the continuous rise of groundwater level, the soil liquefaction potential of saturated sand soil strata has increased. Thus, the groundwater in Taipei basin should be controlled based on the suitable groundwater level to reduce the possibility of land subsidence or soil liquefaction. This study proposes a novel performance of groundwater management model, which considers the three aspects of safe yield, soil liquefaction, and land subsidence. In this process, a three-dimensional groundwater numerical model is primarily established with MODFLOW, and the safe yield and groundwater level are deduced through the Hill method. The second part requires an estimation of the soil liquefaction potential by applying the Seed97 method. The third part of the process includes an estimation of the subsidence of sand by adopting the Ishihara method and the subsidence of clay blanket through the Terazaghi method. Finally, combine the limited groundwater level through the application of the said methods, the proper scope for the level of groundwater in the Taipei Basin is then estimated. Hence, the maximum amount of groundwater that can be pumped could be estimated based on the suitable lower limit of groundwater level, and the minimum amount of groundwater that can be pumped could be estimated based on the suitable upper limit of groundwater level. The study result indicates the central region in the basin has a high potential of soil liquefaction, while the periphery of the basin has a high potential for land subsidence. In consideration of three environmental limited constraints, namely, safe yield of groundwater, soil liquefaction, and land subsidence, could estimate the maximum groundwater amount that can be generated per annum is about 0.77x109m3 to 1.03x109m3, while the minimum groundwater amount per annum is about 0.53x 109m3 to 0.71x109m3.

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