Improving the stream of consciousness: A nomenclature for describing the factor of safety in river bank stability analysis

River management implies in many situation to control the river bank stability. Bio-engineering techniques are used as an alternative to rip-rap. These techniques are not new but a renewed interest was observed during the last decade. However the design of such bank protection is still largely based an expert evaluation of each situation, and we still crudely lack a real state of the art, based on mechanistic consideration of forces exerted by the river. We present the results of preliminary flume experiments aiming to study the resistance of river bank protections using bio-engineering techniques. The final applied objectives will be to propose a framework for a good use of such technique, accounting for the river morphodynamics context.

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Relationship between river bank stability and hydrological processes using in situ measurement data

Central European Geology ◽

10.1556/24.62.2019.01 ◽

2019 ◽

Vol 62 (1) ◽

pp. 83-99 ◽

Cited By ~ 1

Author(s):

Gyula Mentes

Keyword(s):

Measurement Data ◽

Early Warning Systems ◽

Bank Stability ◽

River Bank ◽

River Danube ◽

Water Level Variations ◽

Stable Part ◽

The Stability ◽

High Bank ◽

River Banks

Many river banks throughout the world are prone to landslides; therefore, serious efforts are made to develop landslide early warning systems. This study presents a method by which the stability changes of the river banks can be continuously monitored; necessary measures can be taken in time to reduce the damage. The method was tested in Dunaszekcső (Hungary), where the high loess bank of the River Danube has been intensively moving since 2007. The tilts of the high bank were measured by two borehole tiltmeters. The connection between tilt values and the river- and groundwater-level variations was investigated by multivariable and moving window regression analyses on the basis of a 6-year-long observation from 2011 to 2016. The results show that increasing regression coefficients mean decreasing stability of the high river bank, so the developed method can be used for continuous supervision of the high bank stability. The method is also suitable for studying the causes of motion processes. Investigations showed clearly that the effect of groundwater table variations is two orders of magnitude higher than the water-level variations of the River Danube. In addition to the erosion of the river, various small tilts of the stable and unstable parts also contribute to the arising of new cracks in the stable part, decreasing its width.

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Stability of Road Embankments in Soft Clay

Canadian Geotechnical Journal ◽

10.1139/t74-006 ◽

1974 ◽

Vol 11 (1) ◽

pp. 72-88 ◽

Cited By ~ 8

Author(s):

Kaare Flaate ◽

Terje Preber

Keyword(s):

Shear Strength ◽

Stability Analysis ◽

Factor Of Safety ◽

Soft Clay ◽

Total Stress ◽

Routine Procedure ◽

The One ◽

Marine Clays

Slides in soft marine clays frequently occur during construction of road embankments in Norway. This paper outlines the routine procedure used for a stability analysis of such embankments, based on a total stress concept. Using these procedures, eight slides were investigated, and it was found that the minimum factor of safety obtained could give a too conservative picture of the actual conditions. The minimum factor of safety, which is the one normally used, varied between 0.73 and 1.10. Taking all uncertainties into consideration, an analysis based on a total stress concept as outlined herein must be considered acceptable. The study gives no basis for evaluating the accuracy of the measured shear strength values.

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An Improved Calculation Method for the Factor of Safety and Its Application to the Stability Analysis of Deep Foundation Pits in Red Clay

Journal of Information and Computational Science ◽

10.12733/jics20104269 ◽

2014 ◽

Vol 11 (12) ◽

pp. 4319-4328

Author(s):

Yuanzhong Zhou

Keyword(s):

Stability Analysis ◽

Calculation Method ◽

Factor Of Safety ◽

Red Clay ◽

Deep Foundation ◽

The Stability

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Retrogressive slope failures at Beaver Creek, south of Saskatoon, Saskatchewan, Canada

Canadian Geotechnical Journal ◽

10.1139/t77-035 ◽

1977 ◽

Vol 14 (3) ◽

pp. 288-301 ◽

Cited By ~ 10

Author(s):

M. D. Haug ◽

E. Karl Sauer ◽

D. G. Fredlund

Keyword(s):

Stability Analysis ◽

Soil Properties ◽

Field Investigation ◽

Slope Failures ◽

The South ◽

River Bank ◽

South Saskatchewan River ◽

Rest Condition ◽

Mechanism Of Failure ◽

Rate Of Movement

Active landslides are occurring along the banks of the South Saskatchewan River at Saskatoon. A field investigation and stability analysis indicated that a multiple retrogressive mechanism is valid in explaining the failures at Beaver Creek, 28 km south of Saskatoon. Computations indicated that lateral pressures ranging from the active to something greater than the at-rest condition tend to support the successive blocks but are not high enough to stabilize the slides. It was assumed that the rate of movement of the blocks varies and probably increases downslope. Valuable information was obtained about the soil properties in the area and the mechanism of failure that seems to apply over a long section along the river bank south of Saskatoon.

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