Dynamic Penetrometer, Panda, instrumented DCP, soil characterization, in situ test, compaction control, field correlation.
2024
Article in english
Barcelona
Miguel Angel and Benz Navarrete and Pierre Breul and Gabriel Villavicencio and Philippe Moustan and Luc Teissier

A REVIEW OF 30 YEARS OF FRENCH INSTRUMENTED DYNAMIC CONE PENETROMETER PANDA

Dynamic penetrometer is a worldwide practice in geotechnical exploration and the French Panda®(1) lightweight variable energy is the most developed device nowadays. Widely used in France and other countries, The Panda penetrometer is relatively unknown for characterizing surface soils domain and the possibilities it offers. In this Article, the authors offer a brief review of the principle of measurement, its uses, advantages and disadvantages calibration, and interpretation, as well as...
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A REVIEW OF 30 YEARS OF FRENCH INSTRUMENTED DYNAMIC CONE PENETROMETER PANDA
Dynamic modulus; Dynamic penetration test; k0 Calibration Chamber; DPT.
2024
Article in english
Barcelona
Sebastian Lopez and Miguel Benz and Jean Canou and Jean-Claude Dupla and Sebastian Espinoza

Dynamic modulus Ekd evaluation by dynamic penetration test

Dynamic penetration tests DPT have been routinely employed in the geotechnical characterization of thesubsoil in different types of engineering projects. The evaluation of the results of these tests has been performed consideringa limited number of parameters obtained in the field, so the definition of new parameters allows a more accurate evaluationof soil characteristics. The purpose of this paper is to present a methodology for the evaluation of the dynamic modulus(Ekd)...
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Dynamic modulus Ekd evaluation by dynamic penetration test
2024
Article in english
Caroline Forestti Oliveira, Miguel Angel Benz Navarrete, Pierre Breul, Bastien Chevalier, Quoc Anh Tran

Evaluation of Different Methods for Cone Resistance Assessment from Dynamic Penetration Tests

Dynamic penetration tests (DPT) are largely applied for soil in situ characterization. Cone resistance assessment from DPT isusually based on driving formulas derived from Newtonian approach. These are nevertheless often considered inaccurate and unable to fullydescribe dynamic penetration phenomenon. Wave equation approach provides a more rigorous analysis but remains less common for practicalreasons (requiring instrumentation and a more complex analysis). Historically, driving formulas derived from Newtonian approach are oftenpreferred for...
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Evaluation of Different Methods for Cone Resistance Assessment from Dynamic Penetration Tests
Uncertainty, reliability of results, diagnosis, data fusion.
2024
Article in spanish
La Serena Chile
Jorge Rojas, Pierre Breul, Aurélie Talon, Sébastien Barbier, Miguel Benz Navarrete, Fabien Ranvier, Cesar Valenzuela Jara, José Luis Arraño Urzúa & Johnny Luna Mota

Reduction of uncertainty in the geotechnical diagnosis of railway tracks by data fusion

The degradation of the substructure plays a crucial role in the geometric deterioration of railway track. The condition of the substructure is evaluated by means of geotechnical diagnostics that consider various parameters, among which the geotechnical layer model stands out (Basye et al., 2020). The accuracy in the determination of this model is essential, since it significantly influences decision making and ensures the efficiency of the measures taken. In this...
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Reduction of uncertainty in the geotechnical diagnosis of railway tracks by data fusion
Geotechnical diagnosis Multiplayer system Railways Soil Characterization
2024
Article in english
Jorge Rojas Vivanco, Pierre Breul b, Aurélie TALON, Miguel Angel Benz-Navarrete, Sébastien Barbier, Younes Haddani

Importance of geotechnical diagnosis in railway management A review

Railway tracks, like all civil works, experience degradation after being put into service, thus losing their initial design conditions. This degradation manifests itself mainly through misalignment and specific deterioration mechanisms of each component, which reduces safety and comfort during the passage of trains. In order to maintain their operational capabilities or prolong their service life, continuous monitoring, diagnosis and maintenance processes are carried out. These actions aim to restore the...
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Importance of geotechnical diagnosis in railway management A review
Data Fusion Geotechnical characterization Ground model Uncertainty
2024
Article in english
Singapore
Jorge Rojas, Pierre Breul, Aurélie Talon, Sébastien Barbier, Miguel Benz Navarrete, Fabien Ranvier

Application of Data Fusion to Determine the Geotechnical Model of the Structure

In the context of railways, it is essential to have a reliable ground model to ensure their safety and smooth operation. To achieve this, geophysical monitoring, and geotechnical techniques, are often used. However, effectively combining geophysical and geotechnical data remains a challenge. In this study, a methodology based on data fusion of Ground Penetrating Radar (GPR) and Pandoscope data and based on belief functions is proposed in order to define...
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Application of Data Fusion to Determine the Geotechnical Model of the Structure
Ballasted track Data aggregation Failure models Multicriteria analysis Performance indicator
2024
Article in english
Singapore
Jorge Rojas, Pierre Breul, Aurélie Talon, Sébastien Barbier, Miguel Benz Navarrete, Fabien Ranvier

Proposed Methodology for Obtaining Ballast Layer Performance Indicators

Although ballast layer can be characterized by different parameters, the literature notes the absence of global performance indicators of ballast in ser-vice. This Article presents a methodology that proposed to obtain local perfor-mance indicators (based on the functions performed by the ballast layer) and global performance indicators (based on the combination of the above). The pro-posed methodology consists of three phases: (i) the first is the performance of a functional...
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Proposed Methodology for Obtaining Ballast Layer Performance Indicators
Ground Penetrating Radar; Coastal Resiliency; Dynamic Cone Penetrometer; Shear Wave
2024
Article in english
Barcelona
Brian Harris, Justin Shawler, Jonathan Hubler, Nina Stark, Peter Tereszkiewicz, William Caldwell, Jonathan Moore, and Leigh Provost

Site Characterization of a Restored Coastal Dune and Beach

Coastal beach and dune ecosystems are critically important for shoreline protection and significant resources have been allocated to their conservation. Dune vegetation is known to modify site response to wind, waves, and storms, but little focus has been given to understanding how belowground sediment structures enhance dune stability. A first step in addressing this knowledge gap is to determine optimal methods to measure subsurface sediment properties in onshore sandy environments....
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Site Characterization of a Restored Coastal Dune and Beach
2024
Article in spanish
Chihuahua, Mexico
Jonatan Candelaria and Jesus Solis and Sergio Hernandez and Jose Alfredo Promotor and Sergio Medina and Osvaldo Flores

Estimación del tipo de material a partir de resultados del penetrómetro dinámico PANDA en un depósito de jales

El equipo de Penetrómetro dinámico ligero a energía variable (PANDA) se ha destinado principalmente alcontrol de calidad de compactación, dejando de lado su uso para la clasificación o identificación del tipo de material, talcomo se ha hecho con resultados del ensaye de CPTu. Con un sondeo de PANDA se aprovecha la versatilidad de ser unequipo compacto y con posibilidad de acceder a zonas donde es complicado ingresar con equipos convencionales...
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Estimación del tipo de material a partir de resultados del penetrómetro dinámico PANDA en un depósito de jales
railroad track, ballast, degradation, stiffness, field testing, bender element field sensor, penetrometer
2023
Article in english
Mingu Kang, Han Wang, Issam I. A. Qamhia, Erol Tutumluer, Younes Haddani and Adam Bankston

Degraded Ballast Stiffness Characterization Using Bender Element Field Sensor and PANDA Penetrometer

The progressive degradation of railway ballast over time increases the degree of ballast fouling and poses significant drainabilityconcerns leading to frequent maintenance activities. To avoid such issues, an effective and continuous characterization ofthe physical properties of the ballast layer is deemed necessary. This paper introduces the combined use of a bender element(BE) piezoelectric field sensor and a PANDA dynamic cone penetrometer for periodic evaluations of ballast condition overthe traffic use....
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Degraded Ballast Stiffness Characterization Using Bender Element Field Sensor and PANDA Penetrometer
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