Seismic gravelly soil liquefaction assessment based on dynamic penetration test using expanded case history dataset

2021 ◽  
Author(s):  
Nima Pirhadi ◽  
Jilei Hu ◽  
Yu Fang ◽  
Idriss Jairi ◽  
Xusheng Wan ◽  
...  
Keyword(s):  
Case History ◽  
Soil Liquefaction ◽  
Penetration Test ◽  
Gravelly Soil ◽  
Dynamic Penetration ◽  
Liquefaction Assessment

A Neural Network Model for Evaluating Gravel Liquefaction Using Dynamic Penetration Test

2013 ◽  
Vol 275-277 ◽  
pp. 2620-2623
Author(s):  
Qing Xu ◽  
Fei Kang ◽  
Jun Jie Li
Keyword(s):  
Neural Networks ◽  
Earthquake Engineering ◽  
Soil Liquefaction ◽  
Soil Parameters ◽  
Success Rates ◽  
Penetration Test ◽  
Liquefaction Potential ◽  
Gravelly Soil ◽  
Gravelly Soils ◽  
Dynamic Penetration

Evaluation of liquefaction potential of soils is important in geotechnical earthquake engineering. Significant phenomena of gravelly soil liquefaction were reported in 2008 Wenchuan earthquake. Thus, further studies on the liquefaction potential of gravelly soil are needed. This paper investigates the potential of artificial neural networks-based approach to assess the liquefaction potential of gravelly soils form field data of dynamic penetration test. The success rates for occurrence and non-occurrence of liquefaction cases both are 100%. The study suggests that neural networks can successfully model the complex relationship between seismic parameters, soil parameters, and the liquefaction potential of gravelly soils.

scholarly journals ANALISIS PERENCANAAN TEBAL PERKERASAN JALAN LENTUR PADA RUAS JALAN MAGELANG-SEMARANG

2020 ◽  
Vol 4 (2) ◽  
Author(s):  
Ria Miftakhul Jannah ◽  
Dedy Firmansyah ◽  
Ali Murtopo
Keyword(s):  
Penetration Test ◽  
Data Volume ◽  
Dynamic Penetration

<p>Pada perencanaan perkerasan jalan, tanah merupakan pondasi dasar yang sangat memegang peranan penting. Salah satu data tanah yang dibutuhkan dalam perencanaan pondasi perkerasan jalan adalah nilai CBR tanah. Nilai CBR tanah dapat diperoleh dengan melakukan Uji Dynamic Penetration Test (DCP). Penelitian ini dilakukan pada jalan Magelang-Semarang. Data sekunder berupa data CBR, peta lokasi dan curah hujan. Sedangkan data primer berupa data volume lalu lintas dan kondisi eksisting lokasi studi. Data yang diperoleh kemudian dihitung menggunakan Metode Bina Marga 1987. Dari hasil perhitungan didapat nilai lapisan permukaan diperoleh tebal 7,5 cm. Lapisan Pondasi Atas diperoleh tebal 20 cm. Lapisan Pondasi Bawah diperoleh tebal 16 cm.</p>

Discussion: The Dynamic Penetration Test: A Standard that is not Standardized

Géotechnique ◽  
1970 ◽  
Vol 20 (4) ◽  
pp. 452-456 ◽  
Author(s):  
H. O. Ireland ◽  
O. Moretto ◽  
M. Vargas
Keyword(s):  
Penetration Test ◽  
Dynamic Penetration

Gravelly Soil Liquefaction after the 2016 Ecuador Earthquake

2018 ◽  
Author(s):  
Juan Sebastian Lopez ◽  
Xavier Vera-Grunauer ◽  
Kyle Rollins ◽  
Guillermo Salvatierra
Keyword(s):  
Soil Liquefaction ◽  
Gravelly Soil

scholarly journals Effect of Micropiles on Clean Sand Liquefaction Risk Based on CPT and SPT

2020 ◽  
Vol 10 (9) ◽  
pp. 3111 ◽  
Author(s):  
Visar Farhangi ◽  
Moses Karakouzian ◽  
Marten Geertsema
Keyword(s):  
Soil Properties ◽  
Factor Of Safety ◽  
Standard Penetration Test ◽  
Strength Properties ◽  
Soil Liquefaction ◽  
Penetration Test ◽  
Sand Liquefaction ◽  
Abrupt Decrease ◽  
Novel Approach ◽  
Jet Grouting

Liquefaction is a hazardous seismic-based phenomenon, which causes an abrupt decrease in soil strength properties and can result in the massive destruction of the built environment. This research presents a novel approach to reduce the risk of soil liquefaction using jet-grouted micropiles in clean sands. The saturated soil profile of the study project mainly contains clean sands, which are suitable to more reliably employ simplified soil liquefaction analyses. The grouting is conducted using 420 micropiles to increase the existing soil properties. The effect of jet grouting on reducing the potential of liquefaction is assessed using the results of the cone penetration test (CPT) and the standard penetration test (SPT), which were conducted before and after jet grouting by implementing micropiles in the project sites. According to three CPT-based liquefaction analyses, the Juang method predicts the most effective improvement range of the factor of safety in the clean sand. The Boulanger and Idriss, and Eurocode methods show comparable evaluations. Results of the SPT-based analyses show the most considerable increase of the factor of safety following the Boulanger and Idriss, and NCEER approaches in the SP soil. CPT- and SPT-based analyses confirm the effectiveness of jet grouting by micropiles on enhancing soil properties and reducing the risk of liquefaction.

Field experimental investigation on filling the soda residue soil with liquid soda residue and liquid fly ash

2020 ◽  
pp. 105678952095042
Author(s):  
Xiaoyu Bai ◽  
Jiaxiao Ma ◽  
Junwei Liu ◽  
Mingyi Zhang ◽  
Nan Yan ◽  
...  
Keyword(s):  
Fly Ash ◽  
Water Content ◽  
Raw Materials ◽  
Field Tests ◽  
Dry Density ◽  
Penetration Test ◽  
Maximum Dry Density ◽  
Liquid Mixing ◽  
Optimal Mix ◽  
Dynamic Penetration

In order to reuse waste soda residue, the feasibility of utilizing liquid soda residue and liquid fly ash to prepare soda residue soil was investigated. The mechanical properties of the soda residue soil were studied and analyzed through laboratory tests and field tests. The raw materials preparation process and liquid-liquid mixing method in the field were determined, and the optimal mixing proportion of the soda residue soil was investigated by compaction test and micro penetration test. And the filling quality of the liquid-liquid mixing and solid-liquid soda residue soil was measured by micro penetration test, light dynamic penetration test, and variable energy dynamic penetration test. The test results showed that the optimal mass ratio of soda residue to fly ash is 7:3. The optimal water content and maximum dry density of the soda residue soil with the optimal mix ratio are 63.5% and 0.88 g/cm3, respectively. After 5 months of natural drying, the soda residue soil filled by liquid soda residue and liquid fly ash has higher strength and better uniformity of hardness. The water content of the soda residue soil is between 160% to 180%, and drainage consolidation is the effective method to reduce the water content and improve the strength of the soda residue soil. Compared with the method of preparing the soda residue soil by solid mixing, the method used in this experiment is simple, efficient and feasible.

Evaluating cyclic liquefaction potential using the cone penetration test

1998 ◽  
Vol 35 (3) ◽  
pp. 442-459 ◽  
Author(s):  
P K Robertson ◽  
CE (Fear) Wride
Keyword(s):  
Earthquake Engineering ◽  
Sandy Soils ◽  
Cone Penetration Test ◽  
Soil Liquefaction ◽  
Penetration Test ◽  
Cone Penetration ◽  
Liquefaction Resistance ◽  
Liquefaction Potential ◽  
Engineering Research ◽  
Research Workshop

Soil liquefaction is a major concern for structures constructed with or on sandy soils. This paper describes the phenomena of soil liquefaction, reviews suitable definitions, and provides an update on methods to evaluate cyclic liquefaction using the cone penetration test (CPT). A method is described to estimate grain characteristics directly from the CPT and to incorporate this into one of the methods for evaluating resistance to cyclic loading. A worked example is also provided, illustrating how the continuous nature of the CPT can provide a good evaluation of cyclic liquefaction potential, on an overall profile basis. This paper forms part of the final submission by the authors to the proceedings of the 1996 National Center for Earthquake Engineering Research workshop on evaluation of liquefaction resistance of soils.Key words: cyclic liquefaction, sandy soils, cone penetration test

Distribution and characteristics of gravelly soil liquefaction in the Wenchuan M s 8.0 earthquake

2010 ◽  
Vol 9 (2) ◽  
pp. 167-175 ◽  
Author(s):  
Zhenzhong Cao ◽  
Longqing Hou ◽  
Hongmei Xu ◽  
Xiaoming Yuan
Keyword(s):  
Soil Liquefaction ◽  
Gravelly Soil

scholarly journals Probabilistic version of the Robertson and Wride method for liquefaction evaluation: development and application

2012 ◽  
Vol 49 (1) ◽  
pp. 27-44 ◽  
Author(s):  
Chih-Sheng Ku ◽  
C. Hsein Juang ◽  
Chi-Wen Chang ◽  
Jianye Ching
Keyword(s):  
Factor Of Safety ◽  
Probabilistic Models ◽  
Deterministic Model ◽  
Soil Liquefaction ◽  
Penetration Test ◽  
Cone Penetration ◽  
Liquefaction Potential ◽  
Additional Information ◽  
Extra Effort ◽  
Probabilistic Version

The Robertson and Wride method is the most widely used cone penetration test (CPT)-based method for soil liquefaction evaluation. This method is a deterministic model, which expresses liquefaction potential in terms of factor of safety. On many occasions, there is a need to express the liquefaction potential in terms of liquefaction probability. Although several probabilistic models are available in the literature, there is an advantage having a probabilistic version of the Robertson and Wride method so that the engineer who prefers to use this method can obtain additional information of liquefaction probability with minimal extra effort. In this paper, a simple model is developed, which links the factor of safety determined by the Robertson and Wride method to the liquefaction probability. The model, referred to as the probabilistic RW model, is developed, and verified, in a mathematically rigorous manner. Simplified equations for assessing the variation of liquefaction probability caused by the uncertainty in input parameters are also developed. Example applications are presented to demonstrate the developed models.

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