Modelling failure mechanisms to explain rock slope change along the Isle of Purbeck coast, UK

Allison, Robert J.; Kimber, Owen G.

doi:10.1002/(sici)1096-9837(199808)23:8<731::aid-esp885>3.0.co;2-f

Cited by 22 publications

(4 citation statements)

References 44 publications

(38 reference statements)

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“…At regional scales, susceptibility to rockfall can be affected by variations in climate (Hales and Roering, 2005), topography (Miller and Dunne, 1996), and rock characteristics (Allison and Kimber, 1998). At local scales, where climate and topography are similar, variability in rockfall susceptibility is due to differences in rock characteristics, the local stress state, and variations in surface and subsurface water.…”

Section: Introductionmentioning

confidence: 99%

Influence of tectonic folding on rockfall susceptibility, American Fork Canyon, Utah, USA

Coe

Harp

2007

Nat. Hazards Earth Syst. Sci.

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Abstract. We examine rockfall susceptibility of folded strata in the Sevier fold-thrust belt exposed in American Fork Canyon in north-central Utah. Large-scale geologic mapping, talus production data, rock-mass-quality measurements, and historical rockfall data indicate that rockfall susceptibility is correlated with limb dip and curvature of the folded, cliff-forming Mississippian limestones. On fold limbs, rockfall susceptibility increases as dip increases. This relation is controlled by several factors, including an increase in adverse dip conditions and apertures of discontinuities, and shearing by flexural slip during folding that has reduced the friction angles of discontinuities by smoothing surface asperities. Susceptibility is greater in fold hinge zones than on adjacent limbs primarily because there are greater numbers of discontinuities in hinge zones. We speculate that susceptibility increases in hinge zones as fold curvature becomes tighter.

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Section: Introductionmentioning

confidence: 99%

Influence of tectonic folding on rockfall susceptibility, American Fork Canyon, Utah, USA

Coe

Harp

2007

Nat. Hazards Earth Syst. Sci.

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“…These older tests typically used a mechanic profiler to obtain approximately 10 transects of the profile development and, thereby, did not capture the full redistribution of bed material. In later research, the rates and mechanisms of changes in rock slopes were also examined by distinct element computer modeling using field and laboratory data [14]. A detailed structural analysis was performed by a digital elevation model using COLTOP-3D software for rock slope relief [15].…”

Section: Introductionmentioning

confidence: 99%

Range Image Technique for Change Analysis of Rock Slopes Using Dense Point Cloud Data

et al. 2018

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The use of a terrestrial laser scanner is examined to measure the changes of rock slopes subject to a wave attack test. Real scenarios are simulated in a water flume facility using a wave attack experiment representing a storm of 3000 waves. The stability of two rock slopes of different steepness was evaluated under the set conditions. For quantification of the changes of the slopes after the wave attack test, terrestrial laser scanning was used to acquire dense 3D point cloud data sampling for slope geometries before and after the wave attack experiment. After registration of the two scans, representing situations before and after the wave attack, the cloud-to-cloud distance was determined to identify areas in the slopes that were affected. Then, a range image technique was introduced to generate a raster image to facilitate a change analysis. Using these raster images, volume change was estimated as well. The results indicate that the area around the artificial coast line is most strongly affected by wave attacks. Another interesting phenomenon considers the change in transport direction of the rocks between the two slopes: from seaward transport for the steeper slope to landward transport for the milder slope. Using the range image technique, the work in this article shows that terrestrial laser scanning is an effective and feasible method for change analysis of long and narrow rock slopes.

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“…These older tests typically use a mechanic profiler to obtain ~10 transects of the profile development, and thereby don't capture the full redistribution of bed material. In later research, the rates and mechanisms of changes in rock slopes were also examined by distinct element computer modelling using field and laboratory data (Allison and Kimber, 1998). A detailed structural analysis of rock slope relief was demonstrated using a digital elevation model (Jaboyedoff et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Change Analysis of Laser Scans of Laboratory Rock Slopes Subject to Wave Attack Testing

Shen¹,

Lindenbergh²,

Hofland³

et al. 2017

ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci.

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ABSTRACT:For better understanding how coastal structures with gentle slopes behave during high energy events, a wave attack experiment representing a storm of 3000 waves was performed in a flume facility. Two setups with different steepness of slope were compared under the same conditions. In order to quantify changes in the rock slopes after the wave attack, a terrestrial laser scanner was used to obtain 3D coordinates of the rock surface before and after each experiment. Next, through a series of processing steps, the point clouds were converted to a suitable 2D raster for change analysis. This allowed to estimate detailed and quantitative change information. The results indicate that the area around the artificial coast line, defined as the intersection between sloped surface and wave surface, is most strongly affected by wave attacks. As the distances from the sloped surface to the waves are shorter, changes for the mildly sloped surface, slope 1 (1:10), are distributed over a larger area compared to the changes for the more steeply sloped surface, slope 2 (1:5). The results of this experiment show that terrestrial laser scanning is an effective and feasible method for change analysis of rock slopes in a laboratory setting. Most striking results from a process point of view is that the transport direction of the rocks change between the two different slopes: from seaward transport for the steeper slope to landward transport for the milder slope.

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Modelling failure mechanisms to explain rock slope change along the Isle of Purbeck coast, UK

Cited by 22 publications

References 44 publications

Influence of tectonic folding on rockfall susceptibility, American Fork Canyon, Utah, USA

Influence of tectonic folding on rockfall susceptibility, American Fork Canyon, Utah, USA

Range Image Technique for Change Analysis of Rock Slopes Using Dense Point Cloud Data

Change Analysis of Laser Scans of Laboratory Rock Slopes Subject to Wave Attack Testing

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