The Analytical Challenge

Hazardous processes such as landslides occurring in hilly regions around the world have increased in frequency in recent years due to climate change and the expansion of settled areas. Computing the landslide risk over large regions is becoming more commonly required. The risk also impacts the effort to build or maintain larger geotechnical structures such as earth dams.

Other risks include riverbank stability or the stability of roads or railways through the mountain.The expansion of cities around the world often requires the building of structures on hillslopes or mountainsides where the landslide risk is higher. Engineers are requiring tools of increased accuracy for stability calculations.

Traditional tools based on closed-form solutions are often too simplistic to capture the physical mechanics of slope failure. Geotechnical engineers have long relied on 2D limit equilibrium and finite element numerical methods to assess slope stability. Such methods have traditionally been limited in their ability to assess stability in a 3D regional world.

The SVSLOPE®/MPA™(Multi-Plane Analysis) Solution

SVSLOPE®/MPA™ represents a combination of the classic geotechnical analysis of slope stability by the limit equilibrium method while allowing application over large regions. The analysis can be performed using 2D slices or full 3D. The analysis can consider the effect of pore-water pressure and climate. These factors allow analysis of landslide risk with increased rigor. Regions up to 10km x 10km can be reasonably set up and analyzed in the software with an easy-to-use graphical user interface (GUI).

Regional geometry can be built from LiDAR, survey data or files imported from GIS systems or Google Earth. Likewise, boreholes can be imported and geostrata built. Many different soil strength models can be selected and pore-water pressures can be represented from piezometers or imported from regional groundwater software models. Climatic calculation of actual evaporation (AE) based on weather station data can be incorporated into the model as well, in order to model seasonal precipitation effects or climate change effects.

A semi-automated graphical method of searching for potential slides allows the user to intuitively guide the searching procedure. Hundreds, thousands or millions of analyses can be set up and managed on massively parallel systems and the software can provide quick solutions through a managed parallel solver controller module. The results are assembled and plotted visually in a 3D graphical environment. Aerial photos can be overlaid on the results to locate zones of high risk in their relation to nearby structures, buildings, or residential areas.

SVSLOPE®/MPA™ allows municipal planners, geotechnical, and geological engineers access to an analysis tool of increased rigor for more accurate calculations of regional landslide risk.

Simply stated...slope stability analysis is often targeted at topologically complex sites whose features vary greatly in three dimensions, or seemingly simple surface topology with strong and weak internal layers that vary across the site. For these types of sites, it can be difficult to determine where the location of the failure is most likely to be. Typically, an engineer would be required to perform tedious and time-consuming analysis at multiple different locations in sequence in order to find the location of the failure. SVSLOPE®/MPA™ enables rapid, thorough, and simple to perform analysis of a 3D site at many different locations simultaneously.

KEY FEATURES:

  • Based on rigorous limit equilibrium (LEM) methods • Robust 2D or 3D analysis
  • Complex 3D geostrata can be modeled
  • True 3D LEM analysis of complex topography
  • Consideration of pore-water pressures
  • Consideration of detailed climatic influences
  • Stunning visualization of analysis results
  • Aerial photomap overlays
  • Supports parallel processing of solutions

 

  • Problem
    The rapid growth of cities around the world has resulted in the expansion into hilly or mountainous areas of higher landslide risk. Such risk requires city planning engineers to estimate the potential stability of large areas subject to municipal development.

    Solution
    SVSLOPE®/MPA™ allows analysis of such large areas based on topography, borehole, and piezometric water table data. LiDAR can be utilized to build detailed maps of topology for integration into the numerical model. The model can also be calibrated to existing known slope failures. The resulting output of the 2D or 3D analysis allows the risk zones to be identified. Aerial photos can be overlaid on the high quality 3D results for increased interpretations.

    Software Solutions
    SVSLOPE®, SVDESIGNER™, SVFLUX™WR, SVFLUX™GE

  • Problem
    Engineered roads or railways may often be required through hilly or mountainous zones. The risk of landslides must be mitigated in order to ensure the passage remains safe and useable.

    Solution
    The SVSLOPE®/MPA™ software allows stability analysis along long continuous passages of roads or railways through the input of surface topology from LiDAR, GIS, or Google maps data. SVDESIGNER™ also implements multiple methods of representing complex geostrata as input to SVSLOPE®. An example of analysis of a road through mountains may be seen above.

    Software Solutions
    SVSLOPE®, SVDESIGNER™, SVFLUX™WR, SVFLUX™GE

  • Problem
    Riverbanks and lakefronts are particularly problematic due to changing water levels which can create rapid drawdown slope stability risks. Changes in climate can also re-activate known landslide zones which may be difficult for residential or commercial structures nearby.

    Solution
    SVSLOPE®/MPA™ allows the creation of long riverbanks or the geo-strata surrounding lakes or reservoirs for a more complete picture. The entire site can then be analyzed in 2D or 3D and the factor of safety plotted in 2D plan view or in full 3D view with beautifully detailed graphics as shown below.

    Software Solutions
    SVSLOPE®, SVDESIGNER™, SVFLUX™WR, SVFLUX™GE

  • Problem
    Analysis of large and long geotechnical structures is often problematic. Difficulties have been experienced particularly in larger tailings dams at 3D intersections. Often the engineer can control the engineered structure but the foundation may be subject to varying geo-strata which can affect the stability in a 3D manner.

    Solution
    Use of the SVSLOPE®/MPA™ methodology can provide the engineer with a more comprehensive picture of stability of the structure by performing many stability analyses based on the entire representation of the 3D site.

    Software Solutions
    SVSLOPE®, SVDESIGNER™, SVFLUX™WR, SVFLUX™GE

Our industry defining software will change the game for your firm