Colorado Rockfall Simulation Program Version 5.0 [PATCHED] Download

The Colorado Rockfall Simulation Program (CRSP) was developed to model rockfall behavior and provide a statistical analysis of probable rockfall events at any given site. Version 4.0 is used for Windows 95, 98, and NT systems and includes: introduction, previous work and background, methods, results, discussion of results, conclusions, recommendations, use of the CRSP program, references, appendix. 61 figures. 8 tables. 127 pages. Digital ZIP download. MI-66D

A 2D Rock-fall Simulation Program that takes into account rock fragmentation induced by impact as large rocks roll downslope has been developed. Existing 2D rock-fall programs used in the design of rock-fall hazard mitigation do not take into account rock fragmentation, which may lead to an underestimate of the likelihood of harm and damage from rock-fall to men and equipment especially when evaluating bouncing height for the design of rock-fall catchment. A 2D rock-fall program has been developed from scratch by referring the two existing 2D rock-fall programs, Colorado Rock-fall Simulation Program (CRSP) and Rocfall program from Rocscience. A 2D Discrete Element Code was developed and employed to simulate impact induced rock fragmentation. A large set of impact simulations with variation of input parameters to cover different range of impact scenarios have been performed to populate a database by recording the number of fragments and the radius and average velocities of each fragment. A fragmentation module was then constructed by linearly interpolating the database grid, and integrated into the 2D rock-fall program to predict impact fragmentation processes during a rock-fall analysis. The final 2D rock-fall simulation program is capable of predicting rock-fall trajectories and the relevant parameters such as impact energy, bouncing height, run-out distance of the falling blocks and fragments, which are used to evaluate the need for rock fall mitigation, and to aid in the design of rock fall mitigation. Rock-fall analyses with and without fragmentation modeling on Glenwood case were performed to compare with CRSP. The importance of taking into account rock fragmentation in rock-fall analysis was highlighted.

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The 2-D rock-fall simulation program developed is capable of predicting rock-fall trajectories and the relevant parameters such as impact energy, bouncing height, run-out distance of the falling blocks, which are used to evaluate the need for rock fall mitigation, and to aid in the design of rock fall mitigation.

Bob and Al Ruckman were the recipients of the 1998 IFAI international design award for the design and construction of a 55-ft high GCS retaining wall in Grand County, Colorado, and continue to enjoy solving difficult problems. Together, they have presented technology transfer programs on five continents on the subjects of GCS, landslide mitigation, and rockfall control. They have constructed GCS walls and abutments across the globe. Bob lives in Grand Junction, Colorado, with his wife, Linda.

Rockfalls on debris slopes pose a significant hazard to canyon roads on the Tibetan Plateau. In order to assess risks and develop effective engineering solutions, it is crucial to fully understand the characteristics and processes of rockfall movement. This research utilizes UAVs and three-dimensional (3D) laser scanners to capture images and data, while Pix4D is employed to create a high-precision 3D model from the collected data. Unity3D is utilized to analyze the movement characteristics and deposition positions of rockfall. Various movement characteristic indexes, such as velocity, acceleration, displacement, energy loss, and deposit position, are computed and examined for blocks with different shapes, sizes, instability types on the debris slope, and blocks composed of various slope materials and inclinations. The aim is to obtain insights into the specific movement mechanisms of debris slopes, which differ from conventional slopes. Field experiments have confirmed the effectiveness of the Unity3D simulation approach. Building upon this foundation, a high-precision 3D simulation model for the debris slope of the G318 Highway on the Tibetan Plateau is developed using Unity3D. This model is used to calculate the movement characteristics, energy variation, and deposition positions of rockfall. The findings are then compared with those of common models. The results demonstrate that the high-precision 3D simulation model computed by Unity3D provides more accurate and reasonable results compared to the common model. Moreover, the movement characteristics, energy variation, and deposition positions of rockfall on debris slopes exhibit specific characteristics. By employing Unity3D simulation analysis, a comprehensive understanding of the phenomena and behavior of rockfall on debris slopes can be achieved, enabling the proposal of more reasonable engineering protection measures.

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