Geobrugg - Software Presentation-PPT Presentation

PPT Presentation

Pdf Summary

The presentation reviews Geobrugg’s rockfall mitigation systems and their application to the I-70 Floyd Hill slope in Colorado. Options include slope grading, draped or anchored mesh, rigid barriers, certified flexible barriers, attenuator systems, and engineered berms. Flexible barriers are tested for impact energies ranging from about 35 to 10,000 kJ, while attenuators combine barriers with draped mesh.<br /><br />A major focus is the TECCO anchored-mesh system, which uses high-tensile mesh, spike plates, anchors, and the RUVOLUM dimensioning concept. RUVOLUM assesses local instability between anchors and shallow, slope-parallel failures in layers up to 2 m thick; deeper sliding surfaces require global stability analysis. Full-scale testing validated the design concept.<br /><br />The Floyd Hill case study concerns a 38 m-high, 72-degree slope in Precambrian gneiss. Lidar identified a potentially moving 30 m³ rock block with a planar sliding mechanism. The team evaluated rockfall barriers and a combination of rock anchors and anchored TECCO mesh. The proposed design used 15-ft rock anchors rated at 60 kips, spaced 15 by 8 ft, with separate 10-ft-deep mesh anchors placed between them.<br /><br />Rockfall trajectory modeling with Rocscience RocFall and Geobrugg’s ATTERO software was used to estimate trajectories, bounce heights, velocities, and impact energies and to inform mitigation design. The presentation concludes by emphasizing that system selection depends on factors such as impact energy, barrier height and location, mesh type, anchor spacing, and whether a barrier is rigid or hinged.

Keywords

rockfall mitigation

Geobrugg

I-70 Floyd Hill

TECCO anchored mesh

RUVOLUM

anchored mesh system

rockfall barriers

slope stability

rockfall trajectory modeling

anchored rock bolts