3D MODELING

Rockfall modelling

for hazard characterization and countermeasure design along infrastructures

Rockfalls pose a significant threat to the safety of infrastructures in mountainous regions. Hy-Stone is our advanced 3D rockfall modeling software designed to predict trajectories, impacts, and associated risks. By integrating geomechanical data and advanced simulations, Hy-Stone supports the design of effective protection measures to safeguard roads, railways, and other critical infrastructures, optimizing both safety and cost-efficiency.

  • Long and permanent elements
  • Value of structures and infrastructures
  • Type and value of the transiting vehicles
  • Characteristics of means of transportation
  • Vehicle speed, Time of transit or exposure
  • Exposed lives
  • Three dimensional slope morphology
  • Block characteristics and impact type
  • Single and multiple impacts
  • Linear countermeasures
  • Best positioning and safety distances
  • Hazard and risk hot spots
  • Identification of maintenance hot spots
Design requirements:
  • Trajectory height (location and size)
  • Type of motion (rolling, bouncing, fragmenting)
  • Block shape and energy distribution
  • Impact energy, punching (structural design)
  • Long-term overpassing probability (efficiency)
  • Empirical rules
  • «2D-based» height and energy statistics
  • Decoupled analyses (trajectories + impact)
  • Need for integrated 3D modelling

Reliable proprietary production chain to extract geomechanical data of the rock mass from 3D point clouds for source blocks and their susceptibility (level of instability)  Design volumes  3D Rockfall simulation with Hy-Stone

HY-STONE

  • 3D simulation of free fall, impact and rolling of non-interacting blocks on a DEM-derived topography (no resolution limitations)
  • Kinematic (lumped mass) and hybrid (mixed kinematic-dynamic) algorithms with different contact functions available
  • Stochastic approach: DTM resolution and pseudo-random variation of parameters
  • Impact on structures (i.e. buildings, countermeasures) and trees
  • Visco-elasto-plastic model for impact on soft materials (cushions), stochastic fragmentation
  • Input and output data in ArcGISTM raster and vector formats: interoperability with GIS environments

Results

Detailed information along trajectories:

  • rotational and translational kinetic energy
  • height from the ground
  • velocity
  • Statistics of rockfall information for each grid-cell: number of transits, mean and max energies, mean and max velocities, mean and max height from Stochastic distribution of volumes with exponential function

Dynamic Impact Analyses of dissipative layer

The extended elasto visco plastic model allows to analyse the impact force and penetration as well as block exit trajectory for blocks of different shapes including both the translational and rotational components.

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UNIVERSITY OFFICE:
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