Evaluation of Undrained Shear Strength of Cohesive Soils Using a Flat Dilatometer

Kamei, Takeshi; Iwasaki, Kimitoshi

doi:10.3208/sandf1972.35.2_111

Cited by 33 publications

(18 citation statements)

References 8 publications

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“…The Ballina clay (Table 1) elastoplastic properties and K o values corresponding to these OCR values are listed in Table 2. Results of these analyses are compared against published correlations and field measurements (Marchetti, 1980;Mayne, 1987;Lacasse & Lunne, 1988;Powell & Uglow, 1988;Chang, 1991;Kamei & Iwasaki, 1995;Pineda et al, 2014;Kelly et al, 2015) in ) in the common K o value range, while they approach Marchetti's expression for highly overconsolidated clays. Numerical results can be curve-fitted with the following expression, whose range of application is limited to young clays…”

Section: Effect Of Soil Stress History and Comparison With Field Measmentioning

confidence: 88%

“…Building on the strong correlation of the soil stress history with K D (Jamiolkowski et al, 1988;Lacasse & Lunne, 1988), various researchers proposed expressions to calculate the overconsolidation ratio (OCR) from the horizontal stress index for non-cemented clays (Marchetti, 1980;Powell & Uglow, 1988;Kamei & Iwasaki, 1995). These expressions imply that K D depends only on the stress history, and any effect of other soil parameters is overlooked.…”

Section: One Of the Key Intermediate Parameters Obtained From The Flamentioning

confidence: 99%

“…Luo & Xu, 2006), thus providing the opportunity to directly compare K D to K o , which is an input parameter. The results obtained from a parametric analysis for different soil stress histories are compared against the compilation of field data presented by Kamei & Iwasaki (1995), data from UK clays presented by Powell & Uglow (1988) and new data from the National Soft Soil Test Facility established in Ballina, Australia on soft estuarine clay deposits (Pineda et al, 2014;Kelly et al, 2015). Finally, new formulas are proposed to estimate OCR and K o from K D for non-cemented estuarine clays and future applications of the particular methodology are discussed.…”

Section: One Of the Key Intermediate Parameters Obtained From The Flamentioning

confidence: 99%

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Numerical evaluation of clay disturbance during blade penetration in the flat dilatometer test

Kouretzis

Ansari

Pineda

et al. 2015

Géotechnique Letters

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This paper presents a study on the amplification of horizontal soil stresses during flat dilatometer test (DMT) blade penetration based on three-dimensional total and effective stress numerical analyses, while considering stress-flow coupling and large deformations. The focus here is on saturated clays, and the effect of soil stress history on the horizontal stress index is discussed in detail. The obtained results appear to be in good agreement with published and new field data, leading to the proposal of two new expressions for estimating the overconsolidation ratio and the earth pressure coefficient at rest directly from flat dilatometer tests in estuarine clays.

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Section: Effect Of Soil Stress History and Comparison With Field Measmentioning

confidence: 88%

Section: One Of the Key Intermediate Parameters Obtained From The Flamentioning

confidence: 99%

Section: One Of the Key Intermediate Parameters Obtained From The Flamentioning

confidence: 99%

See 1 more Smart Citation

Numerical evaluation of clay disturbance during blade penetration in the flat dilatometer test

Kouretzis

Ansari

Pineda

et al. 2015

Géotechnique Letters

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“…Currently available correlations shown in Fig. 15 (i.e., those of Marchetti [5] and Kamey and Iwasaki [4]) are limited to cases with OCR C1. According to Fig.…”

Section: Field Test Resultsmentioning

confidence: 99%

“…3. Methods, as will be presented later, have been proposed to estimate the over consolidation ratio (OCR) from K D , for soils with OCR C1 [4]. Empirical equations to determine undrained shear strength based on r vo 0 and K D for cohesive soils have also been suggested [7].…”

mentioning

confidence: 99%

Characterization of reservoir sediment under water with differential pressure-sensored flat dilatometer and piezo-penetrometer

Lee

Wang

et al. 2013

Acta Geotech.

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The unusually strong typhoons and heavy rainfalls occurred recently in Taiwan have caused major landslides in many reservoir catch basins. The debris from these landslides eventually settled in the reservoir and turned into mud. From soil mechanics point of view, the mud immediately in front of the dam where the reservoir is usually the deepest is a very young, normally consolidated or under-consolidated fine-grained soil. The engineering properties of the reservoir mud are important parameters in the planning and design of schemes to remove the mud. Yet, our knowledge in this regard is very limited. For some of the major reservoirs in Taiwan, the mud is often under more than 40 m of water. How to conduct effective geotechnical site characterization under these circumstances is a challenge. The authors developed techniques to incorporate differential pressure measurements in flat dilatometer (DDMT) and piezo-penetrometer (DPu) tests to facilitate in situ measurements under water in a reservoir. A series of field DDMT and DPu tests along with representative soil sampling were conducted at Tsengwen Reservoir in southern Taiwan. The paper describes the techniques of DDMT and DPu tests, interpretation of available test data to obtain the engineering properties of the reservoir mud, and discusses implications in the future site characterization of reservoir mud.

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Site Investigation in Relation to Analysis and Design of Foundations

2016

Shallow Foundations

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Evaluation of Undrained Shear Strength of Cohesive Soils Using a Flat Dilatometer

Cited by 33 publications

References 8 publications

Numerical evaluation of clay disturbance during blade penetration in the flat dilatometer test

Numerical evaluation of clay disturbance during blade penetration in the flat dilatometer test

Characterization of reservoir sediment under water with differential pressure-sensored flat dilatometer and piezo-penetrometer

Site Investigation in Relation to Analysis and Design of Foundations

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