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From page 147... ... 147 Department of Transportation -- Provided Documentation A P P E N D I X D This appendix contains documents provided by state DOTs to represent their policy documentation relevant to rock slopes and rockfall. These documents are current at the time of submission by the DOT (January and February 2021) Read the entire page →
From page 148... ... 148 Design Practices for Rock Slopes and Rockfall Management Page 1 of 2 This section addresses the typical rock slope configurations routinely used by the Iowa DOT during the planning of roadway projects. Rock mass improvement techniques such as bolting, dowelling, shotcreting, etc., to produce a stable slope are not covered herein. Read the entire page →
From page 149... ... Department of Transportation -- Provided Documentation 149 Chapter 200 -- Geotechnical Design Section 200F-8 -- Rock Cut Slopes Page 2 of 2 of different formations (not necessarily at 35 feet) and may vary in width. Read the entire page →
From page 150... ... 150 Design Practices for Rock Slopes and Rockfall Management Chronology of Changes to Design Manual Section: 200F-008 Rock Cut Slopes 8/17/2016 Revised Replaced link to 5A-1 with link to 5B-1. Read the entire page →
From page 151... ... Department of Transportation -- Provided Documentation 151 GT-608-6 06/05 Page 1 of 1 Section CUT SLOPES IN ROCKEOTECHNICAL Subject Slope Design without Intermediate Benches & with Catchment Areas POLICY: Design of a rock cut slope without intermediate benches should be used with a roadside ditch catchment area. The continuous cut slope design should be considered under the following circumstances: Rock is homogenous. Read the entire page →
From page 152... ... 152 Design Practices for Rock Slopes and Rockfall Management GT-608-5 06/05 Page 1 of 1 Section CUT SLOPES IN ROCKEOTECHNICAL Subject Roadside Ditch Bench USE OF ROADSIDE DITCH BENCH: When cut slopes are steeper than 3H:2V and the 30-foot (9-meter) safety clear zone from edge of pavement to the cut slope is not required, a roadside ditch bench is recommended. Read the entire page →
From page 153... ... Department of Transportation -- Provided Documentation 153 SECTION 4 Page 29 quantities listed are in addition to previous quantities or in place of previous quantities on all but the first version of the chart. Be sure to coordinate with the GeoPavement Section to determine if some quantities have already been turned in with their pavement design report. Read the entire page →
From page 154... ... 154 Design Practices for Rock Slopes and Rockfall Management SECTION 4 Page 30 When designing rock slopes it is necessary to consider and include references to blasting. These may be done through the "Rock Blasting" Provision that may include pre-split blasting as a Geotechnical Special Provision or fall under the guidelines of Section 220 "Blasting" in the 2012 Standard Specifications. Read the entire page →
From page 155... ... Department of Transportation -- Provided Documentation 155 Ohio Department of Transportation Division of Production Management Office of Geotechnical Engineering Geotechnical Bulletin GB 3 ROCK CUT SLOPE & CATCHMENT DESIGN January 15, 2016 Geotechnical Bulletin GB3 was developed by the Office of Geotechnical Engineering. The first edition of GB3 was dated January 13, 2006. Read the entire page →
From page 156... ... 156 Design Practices for Rock Slopes and Rockfall Management GB3: Rock Slope Design January 15, 2016 Page 2 of 18 durability of rock units and intersecting discontinuities found throughout Ohio. The design approach presented in this manual accounts for these differences in durability of geologic units as well as anticipated geologic structure encountered in most rock cuts in Ohio. Read the entire page →
From page 157... ... Department of Transportation -- Provided Documentation 157 GB3: Rock Slope Design January 15, 2016 Page 3 of 18 A Definitions Lithologic Unit: A body of rock comprised of a similar mineral composition, grain size, and engineering characteristics. Read the entire page →
From page 158... ... 158 Design Practices for Rock Slopes and Rockfall Management GB3: Rock Slope Design January 15, 2016 Page 4 of 18 B Subsurface Exploration Exploration for a rock cut slope, which includes geologic explorations, data collection, and presentation of information, are vital to the design and construction of rock cut slopes. Read the entire page →
From page 159... ... Department of Transportation -- Provided Documentation 159 GB3: Rock Slope Design January 15, 2016 Page 5 of 18 Information regarding sampling and testing, including bedrock description and unconfined compression strength testing, is located in Sections 400 and 600 of the ODOT SGE. In addition to the aforementioned specifications, the following requirements should be followed: 1. Read the entire page →
From page 160... ... 160 Design Practices for Rock Slopes and Rockfall Management GB3: Rock Slope Design January 15, 2016 Page 6 of 18 C Rock Cut Slope Configuration (Determination of Slope Angle) Read the entire page →
From page 161... ... Department of Transportation -- Provided Documentation 161 GB3: Rock Slope Design January 15, 2016 Page 7 of 18 GB 3 Table 2 - Cut Slope Angle: Incompetent Design Units SDI (Id2) Read the entire page →
From page 162... ... 162 Design Practices for Rock Slopes and Rockfall Management GB3: Rock Slope Design January 15, 2016 Page 8 of 18 a. Recommended Cut Slope Design for Type A Stratigraphy Type A stratigraphy, consisting of competent units underlain by incompetent units. Read the entire page →
From page 163... ... Department of Transportation -- Provided Documentation 163 GB3: Rock Slope Design January 15, 2016 Page 9 of 18 Case 1: Competent lithology comprises 50 percent or greater of unit • Cut the slope at a uniform angle of 1.5H:1V. Provide adequate catchment area (Section E) Read the entire page →
From page 164... ... 164 Design Practices for Rock Slopes and Rockfall Management GB3: Rock Slope Design January 15, 2016 Page 10 of 18 Case 2: Incompetent lithology comprises greater than 50 percent of unit In this case, the incompetent units are usually in red bed claystone units. The design approach should focus on reducing the degradation of the thick incompetent units and retaining the weathered material on the slope face by constructing a serrated slope (a series of small, 3-4' wide benches) Read the entire page →
From page 165... ... Department of Transportation -- Provided Documentation 165 GB3: Rock Slope Design January 15, 2016 Page 11 of 18 The Special Care Formations identified in Ohio include: • Conemaugh formation: red beds–Round Knob Shale (below the Ames Limestone) , Clarksburg Red Shale (below the Connellville Sandstone) Read the entire page →
From page 166... ... 166 Design Practices for Rock Slopes and Rockfall Management GB3: Rock Slope Design January 15, 2016 Page 12 of 18 At the interface between soil overburden and bedrock, a minimum 10-foot wide bench should be provided. Slopes in the soil overburden zone (where the soil is over 10 feet thick) Read the entire page →
From page 167... ... Department of Transportation -- Provided Documentation 167 GB3: Rock Slope Design January 15, 2016 Page 13 of 18 d. Where permeable formations overlie impermeable ones (including areas of fractured flow) Read the entire page →
From page 168... ... 168 Design Practices for Rock Slopes and Rockfall Management GB3: Rock Slope Design January 15, 2016 Page 14 of 18 3. Construction Benches A construction bench is a five (5) Read the entire page →
From page 169... ... Department of Transportation -- Provided Documentation 169 GB3: Rock Slope Design January 15, 2016 Page 15 of 18 catchment ditch configuration is acceptable. The catchment area design should be the larger of the two designs; one based on GB 3 Table 4 and the other being the computer simulation models. Read the entire page →
From page 170... ... 170 Design Practices for Rock Slopes and Rockfall Management GB3: Rock Slope Design January 15, 2016 Page 16 of 18 GB3 Figure 1. Typical ditch configuration for a catchment area with a single angle foreslope. Read the entire page →
From page 171... ... Department of Transportation -- Provided Documentation 171 GB3: Rock Slope Design January 15, 2016 Page 17 of 18 GB3 Table 4 - Recommended catchment widths for varying slope and catchment foreslope angles.* Cut Slope Height, H (ft) Read the entire page →
From page 172... ... 172 Design Practices for Rock Slopes and Rockfall Management GB3: Rock Slope Design January 15, 2016 Page 18 of 18 F Other Geotechnical Considerations Refer to Section 600 of the ODOT Rock Slope Design Guide for the following topics: • Mines and Mine Seals • Groundwater • Surface Water • Transitions • Karst Refer to Section 700 of the ODOT Rock Slope Design Guide for discussion on construction considerations. Read the entire page →
From page 173... ... Department of Transportation -- Provided Documentation 173 Design Manual M 22-01 Geometric Cross Section November 2006 Page 640-17 Rock Slope H (ft) Read the entire page →
From page 174... ... 174 Design Practices for Rock Slopes and Rockfall Management Utah DOT Read the entire page →
From page 177... ... Abbreviations and acronyms used without denitions in TRB publications: A4A Airlines for America AAAE American Association of Airport Executives AASHO American Association of State Highway Officials AASHTO American Association of State Highway and Transportation Officials ACI–NA Airports Council International–North America ACRP Airport Cooperative Research Program ADA Americans with Disabilities Act APTA American Public Transportation Association ASCE American Society of Civil Engineers ASME American Society of Mechanical Engineers ASTM American Society for Testing and Materials ATA American Trucking Associations CTAA Community Transportation Association of America CTBSSP Commercial Truck and Bus Safety Synthesis Program DHS Department of Homeland Security DOE Department of Energy EPA Environmental Protection Agency FAA Federal Aviation Administration FAST Fixing America's Surface Transportation Act (2015) FHWA Federal Highway Administration FMCSA Federal Motor Carrier Safety Administration FRA Federal Railroad Administration FTA Federal Transit Administration GHSA Governors Highway Safety Association HMCRP Hazardous Materials Cooperative Research Program IEEE Institute of Electrical and Electronics Engineers ISTEA Intermodal Surface Transportation Efficiency Act of 1991 ITE Institute of Transportation Engineers MAP-21 Moving Ahead for Progress in the 21st Century Act (2012) Read the entire page →
From page 178... ... Transportation Research Board 500 Fifth Street, NW Washington, DC 20001 ADDRESS SERVICE REQUESTED ISBN 978-0-309-68707-2 9 7 8 0 3 0 9 6 8 7 0 7 2 9 0 0 0 0 Read the entire page →

From page 147...

... 147 Department of Transportation -- Provided Documentation A P P E N D I X D This appendix contains documents provided by state DOTs to represent their policy documentation relevant to rock slopes and rockfall. These documents are current at the time of submission by the DOT (January and February 2021)