Geotechnical site characterisation using Screw Driving Sounding method

Orense, Rolando P.; Mirjafari, Yasin; Suemasa, Naoaki

doi:10.1201/b16744-4

Cited by 5 publications

(7 citation statements)

References 3 publications

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“…There are numerous methods for site investigation, including the SWS, and SDS test, which are simple and convenient [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Soil Strength Estimation Using Screw Driving Sounding Technique for Bangkok Clay Layers

Soralump

2023

GEOMATE

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The Screw Driving Sounding (SDS) test is an improvised and modified version of the Swedish Weight sounding (SWS) test. It is an emerging technique for in-situ field characterization used to estimate strength parameters from field tests directly, rather than by obtaining samples from the field and performing laboratory tests. For this research, several boreholes with standard penetration tests (SPTs) were conducted in the central region of Bangkok. SDS tests and field vane shear tests were performed in the vicinity of these boreholes. The undrained shear strengths from these tests were correlated separately to the SDS torque for marine and intertidal clay deposits. These equations differed slightly due to the difference in the shearing during failure of soil. These empirical equations are supported by an analytical equation that is derived based on the shearing mechanism of soil when the SDS screw head is penetrated into the soil. The correlation to estimate the SPT N was developed for stiff and hard alluvium clay, and compared with the equation from past research. Plots of SDS penetration energy with the consistency index showed that the clays could be clustered as two distinct groups based on their state and consistency. The SDS penetration resistance parameters were extremely affected by differences in the state of clay, which depended on the soil's depositional history and depositional environment. The past researches were mainly empirical and dealt with sand or Japanese clay, formed in different depositional environment. Those equations do not give reliable results when applied directly to Bangkok clay. Hence, from this research, the undrained shear strength of soft clay and SPT N of stiff clay of the Bangkok deposit can be estimated directly from the equations.

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“…There are numerous methods for site investigation, including the SWS, and SDS test, which are simple and convenient [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Soil Strength Estimation Using Screw Driving Sounding Technique for Bangkok Clay Layers

Soralump

2023

GEOMATE

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“…The machine used and the procedure for doing the SDS test are shown in Figure 1. Further details of the SDS tests are presented elsewhere [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Large Displacement Finite Element Modelling of the Screw Driving Sounding Test in Sandy Soil Using the Coupled Eulerian-Lagrangian Method

Mirjafari¹,

Orense

Das

2022

Geotechnics

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The Screw Driving Sounding (SDS) is a recently developed in-situ testing method for soil/site characterisation. To better understand the mechanism of testing, it is essential to create a simulation model for the SDS test to assist in better understanding the response and in improving the testing process, not to mention the development of empirical correlations to estimate geotechnical parameters for use in design. Complex problems involving large deformations are usually difficult to solve with the classical finite element (FE) method because large deformations can lead to large mesh distortions and contact problems. In this paper, a computational model using the finite element method is developed to simulate the drilling process involved in SDS tests; the Coupled Eulerian-Lagrangian (CEL) approach is used to deal with large deformation problems. The SDS drilling process in a sandy deposit with defined stress states (i.e., relative density and effective confining pressure) is simulated, and the SDS-derived parameters are monitored. Based on the simulation results, a chart was established to correlate the measured SDS parameter with the internal friction angle for different vertical effective overburden stresses. The derived chart is validated with the results of laboratory tests performed on samples taken from several sites in Christchurch, NZ, adjacent to the locations of the SDS tests. The results show that the CEL FE framework can model complex physical processes encountered during the SDS drilling. Moreover, the developed chart can be used to estimate the friction angle of the sandy soil based on the SDS-measured torque at a given depth.

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“…o Penetrómetro de sonda lastrada (Swedish Weight Sounding, SWS): este equipo ligero fue desarrollado por la Comisión Geotécnica de los Ferrocarriles del Estado de Suecia como un Sistema versátil y de bajo coste de ensayo in situ (Habibi et al, 2007). Consiste en una varilla con punta con hélice, hincada manualmente a diferentes profundidades bajo diferentes cargas estáticas (Orense et al, 2014). Durante el ensayo, se mide la penetración bajo esas cargas estáticas así como el número de semivueltas de punta que hay que ejecutar tras la fase estática para conseguir que la punta penetre una cierta longitud en el terreno (en su descripción original, descrita por Massarsch (2014) a partir de Olsson (1915), la sonda se lastraba inicialmente con la "fuerza de un hombre", para a continuación añadirse una masa hasta llegar a unos 100 kg y medir la penetración conseguida con 25 medias vueltas de la punta).…”

Section: La Génesis De Los Ensayos De Penetración In Situ Como Técnica De Prospección Geotécnicaunclassified

“…En especial, el rozamiento con el suelo del varillaje suele producir importantes desviaciones en los resultados. Además, en suelos blandos suele tener muy poca resolución (Orense et al, 2014;Tanaka et al, 2012). Su uso viene recogido normativamente por la UNE-ENV 1997-3:2002, que presenta el esquema de normalización de punta mostrado en la Figura 2-7: El concepto de realizar penetración con elementos de punta en hélice no era nuevo.…”

Section: La Génesis De Los Ensayos De Penetración In Situ Como Técnica De Prospección Geotécnicaunclassified

“…o Penetración de sonda atornillada (Screw Driving Sounding, SDS): recientemente desarrollada en Japón (Orense et al, 2014), esta version mejorada del sistema de sonda lastrada (SWS) resuelve algunos de los problemas del sistema original -implementando un sistema de medición de la fricción durante el ensayo de penetración-y automatiza la ejecución del ensayo -minimizando así la influencia del operador como fuente de desviaciones en los resultados del ensayo-. Un ejemplo de esta instrumentación se muestra en la Figura 2-9: o Otros equipos ligeros: En Kianirad (2011) se puede encontrar una lista bastante exhaustiva de otros equipos ligeros de penetración, como el Airfield Cone Penetrometer, el dispositivo de control de compactación rápida (Rapid Compaction Control Device), etc.…”

Section: La Génesis De Los Ensayos De Penetración In Situ Como Técnica De Prospección Geotécnicaunclassified

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Análisis dimensional de la relación entre el ensayo de penetración estándar (SPT) y las velocidades de propagación sísmica primaria y secundaria

Palacio¹

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Geotechnical site characterisation using Screw Driving Sounding method

Cited by 5 publications

References 3 publications

Soil Strength Estimation Using Screw Driving Sounding Technique for Bangkok Clay Layers

Soil Strength Estimation Using Screw Driving Sounding Technique for Bangkok Clay Layers

Large Displacement Finite Element Modelling of the Screw Driving Sounding Test in Sandy Soil Using the Coupled Eulerian-Lagrangian Method

Análisis dimensional de la relación entre el ensayo de penetración estándar (SPT) y las velocidades de propagación sísmica primaria y secundaria

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