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UC-1 Series Geotechnical Analysis
UC-1 2-D seepage analysis(VGFlow2D)
Saturated/unsaturated seepage analysis program

Geotechnical analysis support service

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Program Overview
VGFlow2D is the saturated-unsaturated seepage analysis program using Finite Element Method(FEM) which is collaborated with Gunma University. This program uses strict saturated-unsaturated seepage analysis based on Richards equation, and cover all topics without simplifying so that the applicable scope is not limited and you can be used for general-purpose.

Japanese Road Construction Guideline was revised from the latest perception considering concentrated heavy rain disaster.The revised guideline includes the performance design of framework , and the required performance was clarified. As a result of this change, not only "steady effect", "earthquake effect" and "rainfall effect" are stated as the assumed effect types, therefore the seepage flow needs to be considered in checking bank stability.

Though the seepage flow analysis has been applied to the development for environment preservation, for example the structure involving human lives in washout, it is expected that this analysis will be required in a wider range of applications depending on project scale due to the adoption of the design based on specific safety guidelines for geotechnical constructions in future.

Under this circumstance, the analysis model which makes the groundwater flow 2D phenomenon to simulate will be more required rather than 3D analysis entailed a lof of costs which doesn't seems to be realistic solution.

We released geotechnical analysis series VGFlow2D to meet such requirements. Please see the detailed information of VGFlow2D function.

Functions and Features
Applicable scope
  • This program allows the consideration of seepage flow according to the general construction in "Japanese Road Construction Guideline"-revising in progress, the construction standard of water stop structure in "Technical Criteria for River Works", "River Bank Structure Guideline", "High-Standard Bank Embankment Design and Enforcement Manual" , "Ministry of Agriculture, Forestry and Fisheries of Japan, land reform project design standard", "All-purpose Dam Construction".

  • Steady flow analysis and unsteady flow analysis can be performed, and a wide range of boundary conditions are supported so that almost all 2D seepage phenomenon can be modeled.

    Analysis Type Steady flow analysis
    Unsteady flow analysis
    Analysis Model Two-dimensional vertical plane flow model
    Axisymmetric flow model
    Two-dimensional horizontal plane flow model
    Boundary Conditions Known hydraulic head(:Steady:Unsteady)
    Potential seepage face(:Steady:Unsteady)
    Fluctuating water level(:Unsteady)
    Outflow forbidden(:Unsteady)
    Point source(:Steady:Unsteady)

    Boundary Conditions

  • Allowing terrain configuration model creation from a variety of electronic medium and drawing
  • Common operating interface with our geotechnical series FEM products
  • Anisotropy of water permeability coefficient, terrain inclination
  • Direct input via table for unsaturated seepage property
  • Support for Japanese main parameter including "River Bank Structure Guideline"
  • Obvious output with animated time history for unstable analysis result

  • This is FEM analysis software but its interface is very similar to our UC-1 design software, so that the customer can manipulate as usual design software. In addition, this interface is common mesh split interface with other geotechnical series, it results in time savings in the learning the operations.

    AutoCAD2007 format and SXF format CAD file can be imported, and modeling by scanning of the drawing (paper information) is available.

  • Gunma University's Solver whose quality and reliability has been highly-acclaimed is used.

  • Many post output functions and animations allow the access of the analysis result visually in all aspects.
    This application allows the output of FEM analysis result in flow net(streamline net), and the time transition of flow net can be checked in animation.
    Unsteady analysis results can be saved in AVI format as a movies file.

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