Modification and Statistical Analysis of the Colorado Rockfall Hazard Rating System

Russell, Christopher P.; Santi, Paul; Higgins, Jerry D.

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Modification and Statistical Analysis of the Colorado Rockfall Hazard Rating System

2008-09-01
By Russell, Christopher P. ; Santi, Paul ; Higgins, Jerry D.

File Language:

English

Details

Creators:

Russell, Christopher P. ; Santi, Paul ; Higgins, Jerry D.
Corporate Creators:

Colorado School of Mines
Corporate Contributors:

Colorado. Department of Transportation. Applied Research & Innovations Branch ; United States. Department of Transportation. Federal Highway Administration
Subject/TRT Terms:

Block-in-matrix Slopes Crystalline Slopes Cut Slopes Data Analysis Embankments Geology Hazard Analysis Hazard Rank Literature Reviews Logistic Regression Analysis Multivariate Stepwise Regression Ratings Regression Analysis Rockfall Hazard Rating System (RHRS) Rockfalls Rock Slopes Sedimentary Rocks Sedimentary Slopes Statistical Analysis Total Slopes Univariate Least Squares Regression Weather Conditions
Publication/ Report Number:

CDOT-2008-7
Resource Type:

Tech Report
Geographical Coverage:

United States ; Colorado
Edition:

Final Report
Corporate Publisher:

Colorado Department of Transportation. Applied Research & Innovations Branch
Abstract:

The purpose of this study was to improve the current Rockfall Hazard Rating System (RHRS) in use by the Colorado Department of Transportation (CDOT) by adding several climatic and geological factors recognized in technical literature that contribute to rockfall. Once the system was improved, 200 slopes were rated within the Colorado Front Range: 106 crystalline cut slopes (a crystalline rock cut); 51 crystalline total slopes (both a cut and the natural slope above); 35 block-in-matrix slopes; and 8 sedimentary slopes. The resulting data for each slope type was analyzed using univariate least squares regression, multivariate ordinal logistic regression, and multivariate stepwise regression to identify and rank the dominating factors that contribute to rockfall. The rank of the new scores for the 200 slopes was compared to the rank of the original scores to ensure that the modifications allow for a better prediction of rockfall potential.
Format:

PDF
Collection(s):

US Transportation Collection
Main Document Checksum:

urn:sha-512:a49e3ecd973c0764d275b6e2504f0d7475f9b2180cf6a9e4a55fef9be0ceb133738a1bd9f5db861a710f1e2d074e68fcd5fadb999250b694e891070f349e4dc8
Download URL:

https://rosap.ntl.bts.gov/view/dot/92943/dot_92943_DS1.pdf
File Type:

[PDF - 5.32 MB ]

File Language:

English

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