Design Practices for Rock Slopes and Rockfall Management (2022) / Chapter Skim
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Pages 24-29
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From page 24... ...
24 Case Examples Following completion of the survey, geotechnical specialists from four state DOTs were selected for in-depth interviews. The states were selected to represent a geographical distribution and to provide insight regarding the following: • Regular involvement with rock slope and rockfall mitigation design projects along highway corridors • A mix of new rock slope design and mitigation of existing rock slopes • Depth of experience with both in-house design and consultant design of rock slopes and rockfall mitigation • Development and application of design guidelines for rock slope and rockfall mitigation projects • Incorporation of additional considerations in project design The four DOT case examples were provided by the state DOTs of Oregon, Tennessee, Utah, and Virginia.
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From page 25... ...
Case Examples 25 Oregon Department of Transportation The Oregon Department of Transportation (ODOT) pioneered and popularized aspects of rock slope assessment and rockfall mitigation design used by many DOTs.
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From page 26... ...
26 Design Practices for Rock Slopes and Rockfall Management Design Practice ODOT considers constructability and long-term maintenance as the most important factors in the design of new cut slopes. For rockfall mitigation projects, constructability and funding sources are the most important.
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From page 27... ...
Case Examples 27 RCAD. Design ditch width is clearly tabulated for slopes up to 50 feet tall, which covers most of the rock slopes on TDOT routes.
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From page 28... ...
28 Design Practices for Rock Slopes and Rockfall Management quantify because there is no specific entry in the maintenance tracking system for rockfallrelated ditch cleaning. However, the UDOT risk management group has expressed interest in better tracking of various types of maintenance activities, and more granular data may be available in the future.
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From page 29... ...
Case Examples 29 define rock slope extents. A change in a cut's trend of more than 20° delineates a new rock slope within its inventory.
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