colorado rockfall simulation program version 5

#Colorado rockfall simulation program version 5 pdf#
#Colorado rockfall simulation program version 5 verification#
#Colorado rockfall simulation program version 5 software#

#Colorado rockfall simulation program version 5 pdf#

Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences.

This paper appears in Transportation Research Record No.

Find a library where document is available.

Design graphs are developed based on CRSP simulations by using surface roughness and slope angle to estimate rock velocity and bounce height on uniform slopes. Also, an evalution of the sensitivity of input parameters indicates that slope angle and surface roughness are the most important parameters on steep slopes. A comparison of rock velocity and bounce height obtained from the tapes with CRSP prediction indicates reasonable agreement.

#Colorado rockfall simulation program version 5 verification#

Experimental verification and calibration of CRSP was conducted by analyzing videotapes of rocks traveling down a slope. The program provides estimates of probable velocity and bounce height at various locations on a slope. The statistical variation among rockfalls is modeled by randomly varying the angle at which a rock impacts the slope within limits set by rock size and slope irregularities. Empirically derived functions relating velocity, friction, and material properties are used to model the dynamic interaction of the rock and slope. The model applies equations of gravitational acceleration and conservation of energy to describe the motion of the rock. CRSP uses numerical input values assigned to slope and rock properties to model rockfall behavior. The basic theory behind CRSP is summarized, and the results of recent program modifications and calibration are discussed.

Potential remediation techniques include scaling, hazard-tree removal, rockwedge buttress, and/or drainage.The Colorado Rockfall Simulation Program (CRSP) was developed to provide a statistical analysis of probable rockfall behavior at any given site and to be used as a tool to study the behavior of rockfalls, to determine the need for rockfall mitigation, and to aid in the design of rockfall mitigation. Once the mode of failure was determined, projections of falling rock were studied using Colorado Rockfall Simulation Program, version 4 (CRSP4).

#Colorado rockfall simulation program version 5 software#

This is especially prevalent where water flows into discontinuities, which results in an increase in failure potential.Īfter gathering field data, the information was entered into RockPack III Beta software to display the orientations causing the failure. Weathering of the potassium feldspar into clay creates a lower friction angle in the rock. A contributing factor to failure of the slope is the large amount of potassium feldspar making up the diamictite. The failure slope contains various amounts of undulating fractures with three distinct orientations. It is unbedded and largely layered (from 3-30 meters). This diamictite is a glaciogenic, non-volcanic conglomerate that is matrix- supported. Colorado Rockfall Simulation Program Version 5.0 TRID the TRIS and ITRD database Colorado Rockfall Simulation Program Version 5.0 The Colorado Rockfall Simulation Program (CRSP) was developed in 1987 to estimate the velocity, energy, and bounce heights of rockfall, which in turn forms a basis for selection of designs for mitigation. A highly fractured diamictite makes up the unstable slope. The first step taken in the process of remediation is diagnosing the problem. People spending more time at the site maximizes the time of exposure for falling debris, which may lead to serious injury or loss of life. The location of the piers below the slope failure creates an additional risk.

Two piers have been constructed at the bottom of a slope where rock and sediment commonly build up on the Creeper trail as well as the handicap-access fishing trail located below.

A former road was closed off to vehicles and converted to a handicap fishing access where piers have been installed over the north bank of Whitetop Laurel Creek. R.D., 2000, Colorado rockfall simulation program, version 4.0 (for. The particular area of concern is known as Creek Junction, which is found outside of Konnarock, Virginia. assessed fire impacts and prepared a plan to mitigate the effects of the fire to. The site is a heavily used area for outdoor enthusiasts, who commonly hike, mountain bike, fish, and/or ride horses along the converted Norfolk and Western railroad bed. Debris from an unstable slope along the Virginia Creeper Trail and Appalachian Trail has given rise to concerns for public safety as well as maintenance costs for those at the Mount Rogers National Recreation Area near Marion, VA.