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Context Sensitive Rock Slope Design Solutions

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FHWA-CFL/TD-11-002
2011

Front Materials

report cover

 

Technical Report Documentation Page

1. Report No.
FHWA-CFL/TD-11-002
2. Government Accession No. 3. Recipient's Catalog No.
4. Title and Subtitle
Context Sensitive Rock Slope Design Solutions
5. Report Date
January 2011
6. Performing Organization Code
J2009-05
7. Author(s)
Richard D. Andrew, Ryan Bartingale and Howard Hume
8. Performing Organization Report No.
9. Performing Organization Name and Address
Yeh and Associates, Inc.
5700 E. Evans Ave.
Denver, CO 80222
10. Work Unit No. (TRAIS)
11. Contract or Grant No.
DTFH68-07-D-00001
12. Sponsoring Agency Name and Address
Federal Highway Administration
Central Federal Lands Highway Division
12300 W. Dakota Ave., Suite 210B
Lakewood, CO 80228
13. Type of Report and Period Covered
Final Report
June 2008 - December 2010
14. Sponsoring Agency Code
HFTS-16.4
15. Supplementary Notes
COTR: Amit Armstrong, Ph. D., P.E.
COTR: Khamis Haramy, FHWA-CFLHD. Advisory Panel Members: Khamis Haramy, Mathew DeMarco, and Roger Surdahl, FHWA-CFLHD; Khalid Mohamed, FHWA-EFLHD; Rich Barrows, FHWA-WFLHD; Scott Anderson and Barry Siel, FHWA-RC; Matt Greer, FHWA-CO; and Ty Ortiz, CDOT. This project was funded under the FHWA Federal Lands Highway Coordinated Technology Implementation Program (CTIP).
16. Abstract
The Federal Highway Administration (FHWA) Federal Lands Highway Division (FLHD) evaluated the application of context sensitive solutions (CSS) for rock slope design. The application of context sensitive design in transportation is a method of developing facilities that fit within the engineered setting and preserve scenic, aesthetic, historic, and environmental resources while maintaining safety and mobility.

Proper development of context sensitive solutions starts before the scoping stage and incorporates a number of factors, including community concerns, the effects of roadway development on the physical character of the surrounding area, and a visual prioritization of design considerations. Before starting construction, the contractor and land management agency should agree on a defined standard of performance and communication protocols to ensure that all project goals are attained.

The aesthetics of common rock slope construction and mitigation practices can be enhanced with some modifications. Advantages, limitations, design guidelines, aesthetic value, construction materials, case examples, relative costs, and maintenance procedures are included for each method. Discussions are intended to guide the reader in CSS rock slope development.
17. Key Words
CONTEXT SENSITIVE SOLUTION, CSS, ROCK SLOPES, ROCK EXCAVATION, AESTHETIC ROCK SLOPE, SLOPE STABILIZATION, ROCKFALL PROTECTION.
18. Distribution Statement
No restriction. This document is available to the public from the sponsoring agency at the website http://www.cflhd.gov.
19. Security Classif. (of this report)
Unclassified
20. Security Classif. (of this page)
Unclassified
21. No. of Pages
122
22. Price
0

Form DOT F 1700.7 (8-72)
Reproduction of completed page authorized

Table of Contents

List Of Symbols And Abbreviations

~
Approximately equal to
AASHTO
American Association of State Highway and Transportation Officials
ASTM
American Society for Testing and Materials/ASTM International
AWG
American Wire Gage
BS
British Standard
CALTRANS
California Department of Transportation
CDOT
Colorado Department of Transportation
CFLHD
Central Federal Lands Highway Division
CSS
Context Sensitive Solutions
DOT
Department of Transportation
EFLHD
Eastern Federal Lands Highway Division
FHWA
Federal Highway Administration
FLH
Federal Lands Highway
FLHD
Federal Lands Highway Division
FS
Factor of Safety
ft
Foot (feet)
ft2
Square foot (feet)
ft-tons
Foot-Tons
in
Inch(es)
kJ
KiloJoules
kPa
Kilopascal
m
Meter(s)
m2
Square meter(s)
MPa
Megapascal
MSE
Mechanically Stabilized Earth
PTI
Post-Tensioning Institute
PVC
Polyvinyl Chloride
U.S.
United States
WFLHD
Western Federal Lands Highway Division

List Figures

List of Tables

Acknowledgments

We are grateful for the contributions and cooperation of the Central Federal Lands Highway Division (CFLHD) advisory panel (Khamis Haramy, Mathew DeMarco, Roger Surdahl, Khalid Mohamed, Rich Barrows, Scott Anderson, Barry Siel, Matt Greer, and Ty Ortiz). Specifically, Khamis Haramy's efforts and contributions in the role of CFLHD's Contracting Officer's Technical Representative (COTR) are greatly appreciated. Finally, we extend our thanks to Martha Connors who performed the detailed editing of this document.

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