Cone Penetration Testing in unsaturated soils at two instrumented test sites

Collins, Rodney; Miller, Gerald A.

doi:10.1201/9781003070580-82

Cited by 3 publications

(2 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…If testing is done during a drier weather period, then soil conditions during the SCPT may not portray the worst conditions of the soil profile needed for geotechnical design. Some studies have investigated the influence of moisture content and suction on CPT parameters [4][5][6][7]; however, research into the effect of seasonal moisture changes on shear wave velocity measured with the SCPT is limited. Lehane et al [4] investigated the effect of seasonal changes on in situ parameters at one site using SCPT measurements.…”

Section: Introductionmentioning

confidence: 99%

Field and laboratory measurements of shear wave velocity in unsaturated soils

2023

View full text Add to dashboard Cite

Shear wave velocity measurements in soil are important for assigning site soil profiles to seismic site classes and for calculating other dynamic soil properties. The seismic cone penetration test (SCPT) is commonly used to determine shear wave velocity profiles in the field. In the laboratory, bender elements provide an easy means to measure shear wave velocity of soil specimens from discrete depths. In this study, shear wave velocity measurements obtained from unsaturated soil profiles in the field and on field samples in the laboratory under similar stress conditions were analyzed and compared. Additionally, the influence of seasonal changes on the behavior of shear wave velocity was investigated. Comparisons of shear wave velocities from the field and laboratory were favorable for similar moisture and stress conditions. However, results showed that as the degree of saturation increases and suction decreases the shear wave velocity can decrease significantly.

show abstract

Section: Introductionmentioning

confidence: 99%

Field and laboratory measurements of shear wave velocity in unsaturated soils

2023

View full text Add to dashboard Cite

show abstract

“…Conversely, limited research has been car ried out on CPTs in unsaturated silty materials (Silva and Bolton 2005;Tan 2005;Yang and Russell 2016), due to the intrinsic complexity related to partial drain age, occurring during penetration at the standard rate of 20 mm/s (Paniagua et al 2014), and to the microfab ric of intermediate soils. Most of these studies have been performed on reconstituted samples, under the controlled laboratory environment of calibration cham bers or centrifuges, in order to eliminate the typical uncertainties related to soil heterogeneity and param eters estimation, while only few field tests have been performed so far to evaluate the effect of soil moisture content on the cone resistance, q c (Lehane et al 2004;Collins and Miller 2014;Giacheti et al 2019). The DOI: 10.1201/9781003308829-57 present paper aims at contributing to a better under standing of the effect of matric suction on CPT results interpretation.…”

Section: Introductionmentioning

confidence: 99%

CPT calibration in centrifuge: Effect of partial saturation on cone resistance

Fioravante¹,

Giretti²,

Dodaro³

et al. 2022

Cone Penetration Testing 2022

View full text Add to dashboard Cite

When dealing with unsaturated soil conditions, the influence of matric suction on cone tip resistance of the soil above the ground water table is typically neglected in engineering practice, with conse quent possible misinterpretation of soil features. In the last decades, various researchers have investigated the influence of suction on cone resistance for sands, whilst still little is known for silty materials, whose contri bution can be significant and extended for many meters above the groundwater table. Such issue is especially relevant for compacted earth structures, like river embankments, typically made of a heterogeneous mixture of intermediate soils. With the aim of providing a contribution and stimulating its correct implementation into geotechnical practice, a set of miniature piezocone tests have been carried out in a centrifuge on both saturated and partially saturated silty sand models. The interpretation of CPT results is discussed, highlighting the effect of partial saturation on cone tip resistance.

show abstract

Numerical Evaluation of the Effect of Unsaturated Soil above the Water Table on Cone Resistance

Jarast¹,

Ghayoomi²

2017

Geotechnical Frontiers 2017

View full text Add to dashboard Cite

Cone Penetration Testing in unsaturated soils at two instrumented test sites

Cited by 3 publications

References 1 publication

Field and laboratory measurements of shear wave velocity in unsaturated soils

Field and laboratory measurements of shear wave velocity in unsaturated soils

CPT calibration in centrifuge: Effect of partial saturation on cone resistance

Numerical Evaluation of the Effect of Unsaturated Soil above the Water Table on Cone Resistance

Contact Info

Product

Resources

About