State of the Art: Consolidation Testing

Olson, Roy E.

doi:10.1520/stp34606s

Cited by 91 publications

(32 citation statements)

References 95 publications

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“…where c v = 0.000006 m 2 s −1 is accepted as the coefficient of consolidation (Sridharan and Rao, 1976;Olson, 1986;Robinson and Allam, 1998). The above equation represents the quasi-Lagrangian form of the vertically integrated 1-D consolidation equation.…”

Section: Mathematical Modelmentioning

confidence: 99%

A model of mudflow propagation downstream from the Grohovo landslide near the city of Rijeka (Croatia)

Žic

Arbanas

Bícanić

et al. 2015

Nat. Hazards Earth Syst. Sci.

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Abstract. Mudflows regularly generate significant human and property losses. Analyzing mudflows is important to assess the risks and to delimit vulnerable areas where mitigation measures are required. The smoothed-particle hydrodynamics (SPH) model adopted here considers, in two phases, a granular skeleton with voids filled with either water or mud. The SPH depth-integrated numerical model (Pastor et al., 2009a) used for the present simulations is a 2-D model capable of predicting the runout distance, flow velocity, deposition pattern and the final volume of mudflows. It is based on mathematical and rheological models.In this study, the main characteristics of mudflow processes that have emerged in the past (1908) in the area downstream of the Grohovo landslide are examined, and the more relevant parameters and attributes describing the mudflow are presented. Principal equations that form the basis of the SPH depth-integrated model are reviewed and applied to analyze the Grohovo landslide and the propagation of the mudflow wave downstream of the landslide. Based on the SPH method, the runout distance, quantities of the deposited materials and the velocity of mudflow progression which occurred in the past at the observed area are analyzed and qualitatively compared to the recorded consequences of the actual event. Within the SPH simulation, the Newtonian rheological model in the turbulent flow regime and the Bingham rheological model were adopted and a comparison was made of the application of the Egashira and Hungr erosion law.

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Section: Mathematical Modelmentioning

confidence: 99%

A model of mudflow propagation downstream from the Grohovo landslide near the city of Rijeka (Croatia)

Žic

Arbanas

Bícanić

et al. 2015

Nat. Hazards Earth Syst. Sci.

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“…As is customarily done in conventional saturated consolidation analysis, it will be assumed that the macrostructural (or primary) deformations are due to the dissipation of the excess pressure of the bulk water (Olson, 1986). Thus the secondary compression, typically recorded after the primary compression has been completed, will be attributed to the slow reduction of (Alonso et al, 1991).…”

Section: Secondary Compression As a Local Water Transfer Processmentioning

confidence: 99%

Secondary compression of clays as a local dehydration process

Navarro¹,

Alonso²

2001

Géotechnique

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Long-term volumetric deformations of clays are interpreted in terms of water transfer from clay aggregates to the bulk water. Chemical potentials for the two states of water are first derived and then integrated into balance equations in order to find expressions for the rate of secondary deformation. The resulting model requires the determination of three material parameters, which have a physical interpretation. A procedure to interpret conventional consolidation tests and to find model parameters is described. The model seems to capture well the observed features of secondary clay behaviour, and reproduces in a consistent manner the response of samples of different thickness.

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“…However, the compliance of the pore pressure measuring device has significant influence on the pore water pressure data obtained from these tests. Moreover, an analysis of the laboratory-measured pore pressure data highlighted that the c v values obtained from the pore water pressure may differ significantly compared with settlement analysis (Olson, 1986).…”

Section: Introductionmentioning

confidence: 99%

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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State of the Art: Consolidation Testing

Cited by 91 publications

References 95 publications

A model of mudflow propagation downstream from the Grohovo landslide near the city of Rijeka (Croatia)

A model of mudflow propagation downstream from the Grohovo landslide near the city of Rijeka (Croatia)

Secondary compression of clays as a local dehydration process

Laboratory determination of coefficient of consolidation from pore water pressure measurement

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