Consolidation analysis with pore water pressure measurements

Robinson, R. G.

doi:10.1680/geot.1999.49.1.127

Cited by 36 publications

(20 citation statements)

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“…The issue with the remaining methods at D/H less than 2.5 especially at D/H 0.5 was that the secondary consolidation was not clearly observed rendering difficulty in deriving c v from curve fitting procedure. Previous researcher's showed that c v obtained using Taylor's method is higher than that attained using Casagrande method and Inflection method gives quite a similar result to that of Casagrande method [2,12,20,23]. The reason being; Taylor's method is affected by the initial compression (leading to an increase in c v ) and in some cases secondary compression (decrease in c v value).…”

Section: Effect Of D/h Ratio On the Ratio Of [C V (√T) / C V (Log T)]mentioning

confidence: 72%

The Impact of the Diameter to Height Ratio on the Compressibility Parameters of Saturated Fine-Grained Soils

.¹

2015

IJRET

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Section: Effect Of D/h Ratio On the Ratio Of [C V (√T) / C V (Log T)]mentioning

confidence: 72%

The Impact of the Diameter to Height Ratio on the Compressibility Parameters of Saturated Fine-Grained Soils

.¹

2015

IJRET

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“…Studies have reported that pore water pressure data are significantly influenced by the stiffness of the pore water pressure sensors (e.g. Perlof et al, 1965;Robinson, 1999). Therefore, proper care was taken in selecting the pore pressure sensors to avoid any compliance of the sensors on the pore water pressure data.…”

Section: Theoretical Considerationmentioning

confidence: 99%

“…Lot of laboratory experimental studies have been carried out, in the past, on the measurement of pore water pressure during consolidation (e.g. Whitman et al, 1961;Gibson, 1963;Northey & Thomas, 1965;Sonpal & Katti, 1973;Robinson, 1999;Robinson & Soundara, 2008). Most of the studies were carried out by mounting a pore water pressure measurement device at the base of the consolidation apparatus.…”

Section: Introductionmentioning

confidence: 99%

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Laboratory determination of coefficient of consolidation from pore water pressure measurement

Vinod¹,

Sridharan²

2015

Géotechnique Letters

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ICE Publishing: all rights reserved. In the recent past, many studies have been carried out on the determination of coefficient of consolidation (cv) from the time (t)-deformation (d) data obtained from conventional consolidation tests. Several researchers have also proposed different curve fitting procedures for determining cv from the t-d data. It is anticipated that the cv values obtained from the t-d data may be influenced by initial and secondary compressions. Nevertheless, the pore water pressure data measured during the consolidation process will be independent of initial and secondary compressions. In this study, the conventional Asaoka (1978) method is extended to evaluate cv and end-of-primary (EOP) consolidation from the pore water pressure data measured from laboratory experiments. Laboratory experiments were carried out on the modified one-dimensional consolidation apparatus on different remoulded clay samples measuring pore water pressure during the consolidation process. The cv and EOP computed from the proposed approach have been compared with the results of the t-d data and found to be in good agreement. It is anticipated that the c v values obtained from the t-d data may be influenced by initial and secondary compressions. Nevertheless, the pore water pressure data measured during the consolidation process will be independent of initial and secondary compressions. In this study, the conventional Asaoka (1978) method is extended to evaluate c v and end-of-primary (EOP) consolidation from the pore water pressure data measured from laboratory experiments. Laboratory experiments were carried out on the modified one-dimensional consolidation apparatus on different remoulded clay samples measuring pore water pressure during the consolidation process. The c v and EOP computed from the proposed approach have been compared with the results of the t-d data and found to be in good agreement.

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“…Heterogeneity of mineral content (mica, pyroxene, and plagioclase) suggests a close similarity with the volcanic source and less chemical equilibrium. The close relation between mineralogical conditions of the clayey materials, their ability to retain water, and their compressibility has been doumented by Haigh et al (2013), Robinson (1999) and Warren and Rudolph (1997).…”

Section: Lacustrine Deposits In the Iztapalapa And Tlahuac-chalco Submentioning

confidence: 99%

Analysis of the variation of the compressibility index (Cc) of volcanic clays and its application to estimate subsidence in lacustrine areas

et al. 2015

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Abstract. An analysis of the deformation conditions of lacustrine materials deposited at three sites in the volcanic valley of the Mexico City is presented. Currently geotechnical studies assume that compressibility of granular materials decreases in depth due to the lithostatic load. That means that the deeper the sample the more rigid is supposed to be, this assumption should be demonstrated by a decreased Compression Index (Cc) in depth. Studies indicate that Mexico City clays exhibit brittle behaviour, and have high water content, low shear strength and variable Cc values. Furthermore, groundwater withdrawal below the city causes a differential decrease in pore pressure, which is related to the physical properties of granular materials (hydraulic conductivity, grain size distribution) and conditions of formation. Our results show that Cc for fine grain materials (lacustrine) can be vertically variable, particularly when soils and sediments are the product of different volcanic materials. Lateral and vertical variations in the distribution of the fluvio-lacustrine materials, especially in basins with recent volcanic activity, may be assessed by Cc index variations. These variations can also be related to differential deformation, nucleation and propagation of fractures and need to be considered when modelling land subsidence.

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Consolidation analysis with pore water pressure measurements

Cited by 36 publications

References 0 publications

The Impact of the Diameter to Height Ratio on the Compressibility Parameters of Saturated Fine-Grained Soils

The Impact of the Diameter to Height Ratio on the Compressibility Parameters of Saturated Fine-Grained Soils

Laboratory determination of coefficient of consolidation from pore water pressure measurement

Analysis of the variation of the compressibility index (Cc) of volcanic clays and its application to estimate subsidence in lacustrine areas

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