Sponsor
Portland State University. Department of Geology
First Advisor
Ansel Johnson
Date of Publication
1988
Document Type
Thesis
Degree Name
Master of Science (M.S.) in Geology
Department
Geology
Language
English
Subjects
Geological mapping, Slopes (Soil mechanics), Rock slopes -- Siskiyou National Forest (Or. and Calif.), Geology -- Siskiyou National Forest (Or. and Calif.)
DOI
10.15760/etd.5786
Physical Description
1 online resource (100 p.)
Abstract
The line mapping method of Piteau and Martin (1977) was tested on two different rock type road cuts in the Siskiyou National Forest, and was found to be an efficient means of collecting geological data for rock slope stability analysis. The unbiased approach of this method calls for close scrutiny of the outcrops in question, covering more ground than other methods in less time. In turn, this close attention to every crack in the outcrop reveals more about the stability of the slope, and can reveal hidden hazards of rock fall.
The supportive systems for analyzing the data - stereonets and computer program packages of Watts (1986) - led to the discoveries of several potential plane and wedge failures which were not initially visible. Also revealed was the fairly stable condition of the massive wedge at Elk River, which appeared to be extremely hazardous.
Each potential failure was analyzed for its Factor of Safety under dry and water saturated conditions, and the cohesion necessary to maintain stability was reported.
Rights
In Copyright. URI: http://rightsstatements.org/vocab/InC/1.0/ This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).
Persistent Identifier
http://archives.pdx.edu/ds/psu/21798
Recommended Citation
Visconty, Greg, "Rock slope stability studies in Siskiyou National Forest" (1988). Dissertations and Theses. Paper 3903.
https://doi.org/10.15760/etd.5786
Comments
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This thesis includes supplemental content.