Laboratory experiments of ice scour processes: rigid ice indentor

Barker, Anne; Timco, G.W.

doi:10.1016/s0165-232x(02)00057-5

Cited by 13 publications

(11 citation statements)

References 1 publication

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“…When the same analysis was carried out for the three different scour widths (150, 250 and 500 mm), shown in Figure 16, it was found that the rate effects (dF/dv) increased, with reasonable accuracy, linearly with the scour width B. Equation 1 derived by Barker and Timco (2002) shows that scour loads increased linearly with the scour width too. Furthermore, the present analysis shows that scour loads increased proportional to (D+d) 2 .…”

Section: Pore Pressure Reduction Near the Dilating Shear Bandmentioning

confidence: 83%

“…Furthermore, the present analysis shows that scour loads increased proportional to (D+d) 2 . The height of sand accumulated in front of the iceberg model was not included in the model presented by Barker and Timco (2002) and for that reason, both models cannot be compared directly. Eq.…”

Section: Pore Pressure Reduction Near the Dilating Shear Bandmentioning

confidence: 99%

“…A number of physical modelling studies have been undertaken to investigate the ice scour process either through small scale (e.g. Arnau and Ivanovic, 2015;Kioka et al, 2000;Abdelnour and Graham, 1984;Barker and Timco, 2002), large scale (e.g. Peek et al, 2013;Liferov and Høyland, 2004) or centrifuge tests (e.g.…”

Section: Introductionmentioning

confidence: 99%

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Rate effects during ice scour in sand

Arnau

Ivanović

2019

Cold Regions Science and Technology

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This study is focused on the prediction of ice scour loads on a cohesionless seabed in saturated and dry conditions by means of reduced scale physical model testing. The influence of different soil parameters such as the soil permeability and the relative density have been studied in the laboratory under 1g conditions over a range of scouring depths, scouring widths and drifting velocities of an iceberg model. The effect of the drifting speed on the scouring loads was found to be important: a sandy seabed scoured by an iceberg with a mean drifting speed of 0.2 m/s can generate scour loads twice as large as the static loads at prototype scale. The methods used currently to predict ice scour loads consider only the static loads under drained conditions, lower bound, even though some of the methods have been calibrated or compared against experimental results under saturated conditions. In order to calculate the upper bound of the scour loads, the model described in this paper is proposed, which takes into account the undrained (or partly-undrained) responds of a sandy seabed.

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Section: Pore Pressure Reduction Near the Dilating Shear Bandmentioning

confidence: 83%

Section: Pore Pressure Reduction Near the Dilating Shear Bandmentioning

confidence: 99%

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Rate effects during ice scour in sand

Arnau

Ivanović

2019

Cold Regions Science and Technology

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“…Grooves tend to occur in the streamwise direction with the main flow and can have a significant effect if they remove natural armor or riprap protection installed to protect a structure or the upstream channel (Prowse 2001). In a series of tests at the Canadian Hydraulics Centre, researchers demonstrated the effect that ice gouging can have on bed material (Barker andTimco 2002, 2003). The presence of direct scour on the bank can be identified by undercuts, high benches, and vegetation damage (Prowse 1993).…”

Section: Gougingmentioning

confidence: 99%

Validation of modeling flow approaching navigation locks

Carr¹,

Dahl²

2017

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Ice in navigation channels and around structures can cause significant damage that requires expensive repairs. This damage can also trigger delays that have the potential to disrupt the entire navigation system, well beyond the reach of the stretches of water directly impacted by ice. One example is upstream of Melvin Price Lock and Dam where ice-induced scour was repaired at a cost in excess of $1,000,000 and the scour hole reappeared within a year of the repair. Therefore, this report outlines the risks to navigation and structures, including a review of the available literature.

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“…To the authors' knowledge, however, only a few investigators (Barker and Timco, 2002, for instance) have adopted this procedure. Ideally, a parametric analysis should be done from the same test set-up in order to observe trends when one parameter is varied.…”

Section: Parametric Analysismentioning

confidence: 99%

Ice-Soil-Pipeline Interaction during Seabed Gouging in Physical Tests: Database Analysis and Outstanding Issues

Barrette

Sudom²

2014

All Days

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Ice gouging (or scouring) events affect the seafloor in a way that needs to be understood prior to determining safe and cost-effective burial depths of subsea pipelines in cold oceans. Knowledge on seabed scour phenomena has been gained by means of numerous physical tests in a laboratory or outdoors. Nearly 500 of these tests conducted over the past few decades were compiled into a database, a form of repository that is meant to be updateable, upgradeable and verifiable. This compilation shows that two distinct test set-ups were used: one in which a pre-set gouge depth was selected and vertical loads were monitored; the other with a pre-set vertical load and where keel heaving is allowed. Soil type and normal versus high simulated gravity are two other decisive parameters in test design. The results of this compilation are summarized. Parametric analysis of variables in the database is difficult due to significant differences in test programs. A comparison is made between seabed survey field data and the ranges of gouge width and depth obtained (or targeted) in the tests. A number of significant issues and information gaps have been identified, which could be given priority in future test programs.

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Laboratory experiments of ice scour processes: rigid ice indentor

Cited by 13 publications

References 1 publication

Rate effects during ice scour in sand

Rate effects during ice scour in sand

Validation of modeling flow approaching navigation locks

Ice-Soil-Pipeline Interaction during Seabed Gouging in Physical Tests: Database Analysis and Outstanding Issues

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