Proposed Rock Slope and Rockfall Design Procedures and Methods for Evaluating Rockfall Sites within a Corridor

摘要

Recent Federal legislation has linked asset management principles to transportation funding for pavements and bridges. Several transportation agencies are applying asset management principles to geological hazards and slopes. This has generated great interest in determining appropriate methods, designs, and guidelines for evaluating roadway corridors to address rock slope and rockfall design procedures and standards. This paper presents the results of the previous discussion for roadway corridors within Colorado. Proposed methods for evaluating rock slopes and rockfall potential include using the following concepts: 1) Rockfall Hazard Rating Systems (RHRS) or modified rating systems to evaluate the rock slope features that could potentially generate rockfall, 2) rock slope treatment based on rockfall potential (slope treatment includes such items as blasting methods, bolting, draped mesh, and pinned mesh), 3) expected percentages of rockfall catchment relative to rock slope treatment, and 4) catchment percentage requirements based on such factors as traffic volumes for a given corridor.