Characterisation and engineering properties of Tiller clay

Gylland, Anders Samstad; Long, Michael; Emdal, Arnfinn; Sandven, Rolf

doi:10.1016/j.enggeo.2013.06.008

Cited by 38 publications

(14 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Although the marine clays in southeast Norway have similar depositional history and mineralogy to those in the mid-Norway area, they often have slightly higher clay content and consequently higher water content and lower bulk unit weight. Most notably they are usually of higher plasticity (e.g., Gylland et al 2013). Long and Donohue (2007) previously presented data similar to that shown in Fig.…”

Section: Sites In Southeast Norwaysupporting

confidence: 72%

Relationship between Shear-Wave Velocity and Geotechnical Parameters for Norwegian Clays

L’Heureux

Long

2017

J. Geotech. Geoenviron. Eng.

View full text Add to dashboard Cite

A database of shear-wave velocity (V s) measurements using a variety of techniques and soil properties measured on high-quality samples for 28 Norwegian sites has been established. The purpose was to evaluate the different methods of measuring V s , to present guidelines and correlations to assist in estimating V s profiles in these clays in the absence of site-specific data, and to outline relationships that can be used to give first-order estimates of soil properties. It was found that consistent measurements of V s can be obtained from a variety of techniques and that for practical engineering purposes the V s values obtained from the different methods are similar. Surface wave techniques can be particularly useful but careful survey design is necessary and in particular the inversion process needs to be carefully controlled. Differences of about 15-20% can be obtained in the V s values depending on the algorithm used. V s values for Norwegian clays are consistent with well-established frameworks for other materials, based on relationships between effective stress and index parameters. Piezocone penetration testing (CPTU) can be used to give acceptable estimates of V s and this includes techniques which utilize the CPTU data only and are independent of any index property. V s correlates well with triaxial compression and direct simple shear derived undrained shear strength (s u) values. There appears to be a particularly good link between V s and preconsolidation stress (p 0 c). Satisfactory relationships also exist between V s and the tangent moduli of the clays at in situ stress (M 0) and at p 0 c (M L).

show abstract

Section: Sites In Southeast Norwaysupporting

confidence: 72%

Relationship between Shear-Wave Velocity and Geotechnical Parameters for Norwegian Clays

L’Heureux

Long

2017

J. Geotech. Geoenviron. Eng.

View full text Add to dashboard Cite

show abstract

“…However, due to the limitations of this study more investigations are needed before conclusions can be drawn. The theoretical value of the RES after the unloading of the sensitive Tiller clay is p′ ps = − u ps = 65 kPa, with an assumed K′ 0 = 0·5 (based on Brooker & Ireland, 1965;Gylland et al, 2013). The observed maximum RES ( p′ r = 13·7 kPa when the sample is above ground) is very low compared with a theoretical value of 65 kPa and p′ r /p′ ps = 0·21 and p′ r /σ′ v0 = 0·14.…”

Section: Resultsmentioning

confidence: 92%

“…(1997b) and Sandven (1990) literature (e.g. Sandven et al, 2004;Gylland et al, 2013;Amundsen et al, 2016b) and the geotechnical profile is shown in Fig. 2.…”

Section: Materials and Methodologymentioning

confidence: 99%

An attempt to monitor pore pressure changes in a block sample during and after sampling

Amundsen

Jønland

Emdal

et al. 2017

Géotechnique Letters

Self Cite

View full text Add to dashboard Cite

A soil sample goes through stress changes during and after sampling. Sensitive clays are affected by sample disturbance and stress changes have a great effect on the quality. The reduction of in-situ total stresses to zero causes the soil sample to develop a negative pore pressure, which is also referred to as residual effective stresses. In an ideal situation, a block sample shall retain its residual effective stress during sampling and storage, which prevents it from swelling. To study this, an attempt was made to monitor the pore pressure variations inside a block sample of soft, sensitive, low-plasticity clay during and after sampling. The pore pressure was measured continuously during the storage period of 3 days and the results were compared with a similar work. The findings suggest that the residual effective stress in block samples may be reduced in a matter of minutes after sampling. Testing performed on reference samples corroborate these storage effects.

show abstract

“…In Norway, Gylland [13] stated that vane shear test has been used as in-situ test equipment since the past years. However, this method tends to be less popular because of CPTU-test.…”

Section: Vane Shear Testmentioning

confidence: 99%

“…The advantages of vane shear test are less timeconsuming, and it is applicable in homogeneous deposits [13]. The effect of different vane size is minor in most soil and by applying two different vanes with different length to a diameter ratio in the same stratum, the soil strength anisotropy can be inferred [21].…”

mentioning

confidence: 99%

Measurement of Peat Soil Shear Strength Using Wenner Four-Point Probes and Vane Shear Strength Methods

Afip

Taib

Jusoff

et al. 2019

International Journal of Geophysics

View full text Add to dashboard Cite

The general objective of this research was to measure the peat soil shear strength using Wenner four-point probes and vane shear strength methods. Specifically, the objective of this study was two-fold, namely, (a) investigating the relationship between laboratory soil resistivity and undrained shear strength and (b) determineing the relationship between in-situ soil resistivity and undrained shear strength. Data were randomly collected over six locations in Meranek, Sarawak, for in-situ test and three repetitions for each data were set based on three parameters. The selected parameters were soil density, moisture content, and salinity for both laboratory and in-situ test using Wenner four-point probes and vane shear method. The soil resistivity and vane shear strength readings for laboratory test were correlated with soil salinity, moisture content, and density. The R2 values showed a good correlation for soil salinity (R2 =0.8468) and density (R2 =0.9475), respectively. However, a weak correlation of R2 =0.1205 was observed for soil moisture. The R2 value for in-situ correlation between soil resistivity and three parameters (soil salinity, moisture content, and density) was R2 =0.8916. It can be concluded that the peat soil shear strengths of the study area using Wenner four-point probes from in-situ were (4.38 ohm.m) and laboratory was (2.47 ohm.m) and when using the vane shear strength method, in-situ was (23 kPA) and laboratory was (5 kPA). This study implies that the peat soil of the study area can be categorized as texture (soft loamy soil) and it is suitable for agriculture instead of construction. The relationship established between Wenner four-point probes and vane shear method can be beneficial for ground engineering design to enhance investigation on site suitability. Future work on DUALEM-421 technique should be emphasised for better subsurface exploration accuracy and resolve peat depth for an in-situ test.

show abstract

Characterisation and engineering properties of Tiller clay

Cited by 38 publications

References 18 publications

Relationship between Shear-Wave Velocity and Geotechnical Parameters for Norwegian Clays

Relationship between Shear-Wave Velocity and Geotechnical Parameters for Norwegian Clays

An attempt to monitor pore pressure changes in a block sample during and after sampling

Measurement of Peat Soil Shear Strength Using Wenner Four-Point Probes and Vane Shear Strength Methods

Contact Info

Product

Resources

About