*Download the information leaflet of PiR3D release 4.1

*Download the paper presented in the Rock Slope Stability Symposium, organized in 2010 by INERIS (RSS2010)

CONCEPT

PiR3D is one of the whole first software for modeling block falls in 3D! Our recognized sofware is available in english and french version

It uses a revolutionary probabilistic approach for computing shape variations of blocks, taking into account soil characteristics and other useful parameters.

Our powerful grid computing algorithms allows:

• definition of various soils with different geomechanical characteristics

• definition of several initial starting lines or areas for rock fall simulations

• instantaneous calculations with hundreds of non-homogenous blocks

• visualization of trajectories through cross-sections in 2D or 3D view

• visualization of digitalized maps for DTM rendering

• determination of true zones of risks

• positioning of protection works

DIGITAL TERRAIN MODEL

Our easy to use front end will allow you to be productive in quick delays:
• building a terrain from scratch, starting with a scanned image, is a 20 minutes process. And it is easy to add/remove mesh points at each step of your study,
• importing a TXT, CSV or DXF files (AUTOCAD data, ARCVIEW data,...) is even faster. You can also import DEM, PLY, 3DS and STL files.

Moreover a mesh is quickly built using a modified Delaunay algorithm, which can be constrained with level curves or other boundary conditions.

Elevation models can also be defined from a simple cross section, by entering topographic coordinates and a width for extruding this cross-sectional area.

SOIL PARAMETERS

Integrating soil parameters is a "one" click process :

• creation of various soils with their physical characteristics (Rn, Rt, angle variations of horizontal and vertical rebound, sliding coefficient, random parameters and distribution method, color...)

• assignment of a soil to each triangle of the mesh. This process is fully managed with a simple mouse click or region boundaries selection

RESULTS

PiR3D is articulated on four interactive windows for analysing results, which allows to see :

• cartographic 2D & 3D views

• cross-section views, with data on each impact point (coordinates, soils, angle and speed before and after rebound…), and variation of block energies along trajectories

• perpendicular views across trajectories, with height & energy data when blocks were stopped by your defined protection works.

• curves and statistical graphs & plots for height and energies

• Percentage & location of blocks reaching your protections and other useful informations

• the envelop of energies, class energy, height of blocks, trajectory density and velocity of blocks

DIMENSIONING OF PROTECTION WORKS

The dimensioning of protection works is very easy using PiR3D :

create a protection work by simply drawing a line catching block trajectories (blue line), and specify a height.

In the 3D view, the trajectories catched by your protection do not pass through, and are traced so you can instantly see and analyze the results while varying the height and the position (simple drag the line in the 2D view)

in the block energies view, all the catched trajectories are represented by a point in a XZ plotting representation. The ground is also drawn by a topographic line. Finally the color variation of points indicate the energy intensity