
Creation of model geometry
Intersection creation
Intersections can be created between arbitrary objects like solid, surface,
and line. even if many structures are intersected intricately.
Group
In 3 dimensions, the number of objects becomes larger than that of 2 dimensions,
and model editing becomes more difficult. Grouping of plural objects with
the same property value makes it possible to select many objects in a lump
and assign material constant.
Display/hiding and confined selection of objects
In the complex 3D model, only the object that you want to edit can be displayed.
You can also make a selection from the each of the confined objects of
materials, surfaces, and solids.
Import of the terrain data in the LandXML format
You can now import the 3 dimensional coordinate data and its connection
information of the point clouds on the ground surface or on the stratum
boundary created in LandXML format. Complex terrain information can be
built automatically without manual entering, and object structure can also
be modeled from the information.


Terrain created from LandXML file 
Display/hiding and confined selection of objects 
Realistic modeling of the objects like complex terrain and crossed tunnel
that can be handled only by the 3 dimension analysis is also available.
Mesh division
Mesh is divided semiautomatically. First, set the number of divisions of
block line. The line can be divided at regular intervals or in the specified
ratio. Surface is parted into triangle or rectangle, and solid is parted
into tetrahedron or pentahedron. Model mesh is parted easily even after
the number of division has been changed.
Element library
Solid elements are used for the ground modeling. Tetrahedron, pentahedron,
and hexahedron element are available in this product.

Solid elements (tetrahedron, hexahedron, and pentahedron) 
Post processor


Contour figure and plane cut of that 


GeoFEAS3D is '3D Geotechnical Finite element Elastoplastic Analysis Software'.
It is the software product for 3D stressdeformation analysis of soil under
static conditions. This FEM product can be used for the elastplastic analysis
in a lot of ground related field such as a pile foundation analysis, earth
retaining excavation analysis, tunneling shield, and slope stability analysis.
Applied for
 
Stress and deformation analysis of the ground 
 
Tunnel construction study analysis in NATM method 
 
Slope stability analysis 
 
Study of the effect of changes in the water pressure on the ground 
 
Retaining excavation analysis 
 
Study of the interaction between ground and structure 
 
Analysis of the effect to the surrounding ground during the tunneling shield
excavation 
 
Seismic response method 
Functions and features
Stage analysis
material constant, boundary conditions, and stress release rate during
the excavation can be set for the each step of the stage analysis (construction
step analysis).
Shear strength reduction method
At each analysis stage, you can calculate overall safety rate by shear
strength reduction method and estimate the slip surface. The method can
be applied to the 3 full elastoplastic models.
Local safety rate
This is calculated for each integration point.
Combination of analysis functions
Using some analysis functions together, you can execute the deformation
analysis and stability analysis at the same time for a variety of problems
related to ground, such as excavation and embankment, and slope stability,
support force.
Mixture of the constitutive law
This can be provided to each material.
Type of analysis
Static total stress analysis
Load conditions
This is a program that analyze total stress without regarding permeability
phenomenon of the ground.
Considering water pressure as nodal load, you can study the influence to
the ground exerted by the change in water pressure.
As load types, you can consider node concentrated load, uniformly distributed
load, distributed load, and volume load (own weight and static seismic).
Element catalog 
Structure models 
Support 
Concentrated load 
Nodal concentrated load 
Yes 
Distributed load 
Linear distributed load, plane distributed load 
Yes 
Own weight 
Horizontal acceleration, vertical acceleration 
Yes 
Distributed load 
Constant horizontal load in depth, constant vertical load in depth 
Yes 
Horizontal seismic intensity distributed in depth,
vertical seismic intensity distributed in depth 
No 
Water pressure 
Water pressure on node 
Yes 
Boundary conditions
single point constraint (horizontal roller, vertical roller, fixed, and
pin), multipoint constraint (MPC, hinge), and forced displacement are
available. Material constant and boundary condition can be set in each
stage.
Constitutive law
The most basic method of stressdeformation behavior analysis of soil is using
elastoplastic analysis. It is necessary to select proper element types,
constitutive laws, etc.
GeoFEAS Flow has 15 constitutive laws for soil and structure from the simplest
linear elastic constitutive law to elastoplastic constitutive law. Notension
material is also available. In the Processor, it is possible to perform
both deformation and stability analysis at the same time by combining stage
and SSR analysis, and to deal with a wide range of soil related problems
such as filled/excavated area, slope stability and bearing capacity, etc.
Model types 
Structure models 
Note 
Elastic 
(1) Linear elasticity 
Isotropic 
(2) Laminated elasticity 
Anisotropic 
Non elastic 
(3) Duncan 1 
Use constant Poisson ration 
(4) Duncan 2 
Define volume coefficient 
(5) Dmin 
Technique by CRIEPI 
Nonlinear 
(6) HD (HardinDrnevich) 

(7) RO (RambergOsgood) 

(8) UWClay (UgaiWakai) 

full elastoplastic 
(9) MC (MorhCoulomb) 
Associative/nonassociative flow rule 
(10) DP (DruckerPrager) 
Associative/nonassociative flow rule 
(11) MCDP (MohrCoulomb / DruckerPrager) 
Nonassociative flow rule 
Elasoplastic 
(12) PZSand (PastorZienkiewicz) 

(13) PZClay (PastorZienkiewicz) 

NoTension 
(14) Linear elasticity 

(15) Laminated elasticity 

You can apply bilinear model to the bar element and the spring element,
and MohrCoulomb method to the joint element. Linear elastic model can
be applied to the beam, bar, spring, and joint element.
Output items
Result type 
Result 
Contour figure 
Displacement 
Stress 
Strain 
Max. shear stress 
Increment of Max. shear stress 
Compressive stress 
Tensile stress 
Local safety rate 
Total safety rate (only for SSR analysis) 
Tensor 
Solid element stress 
Solid element strain 
Section force of the plate element 
bending moment of the plate element 



Saturated/unsaturated seepage analysis program using Finite Element Method (FEM)
is based on the analysis solver produced by the Prof. Ugai laboratory
(Department of engineering, Gunma university). This product has been developed
by customizing VisualFEA as pre and post parts. It provides easy ways to
generate two and three dimensional (2D and 3D) complicated shaped geological
boundary models, and several functions such as regular meshing, automeshing and
remeshing by setting types and dimensions of elements. Stationary and transient
analysis can be conducted in 2D vertical, 2D axisymmetric, horizontally 2D and
3D models using several boundary conditions.
Applicable scope
 
Check of the rainfall influence against road banks 
 
Influences of rainfall and spring in large basin 
 
Measures of seepage surface and water pressure distribution in river levee 
 
Design calculation of fill type dam body and investigation of seepage on
the ground around reservoir 
 
Examination of permeability in the basic process like curtain grouting 
 
Design calculation of dam body of reservoir and one for disaster prevention 
 
Examination of piping and boiling during excavation 
 
Influences of confined groundwater 
 
Effect of drainage well on pore pressure distribution in landslide region 
 
Investigation of seepage in cofferdam 
Functions and features
Analysis Type Steady flow analysis / Transient flow analysis
Analysis Model
3D flow model
Boundary Conditions
This product can define the following seven types of boundary conditions
and set fluctuating water level and rainfall boundaries at the same time.
 
Known hydraulic head 
 
Point source 
 
Known flow 
 
Fluctuating water level 
 
Leaching 
 
Rainfall 
 
Outflow forbidden 


Unsaturated seepage characteristics
 van Genuchten model
 Volumetric water contents θ  Suction ψ, and Volumetric water contents θ  Relative
hydraulic conductivity Kr
Library of the material parameter
Output items
Result type 
Result 
Contour figure 
Pressure head 
Potential 
Pore water pressure 
Fractional saturation 
Volume water content 
Hydraulic gradient 
Current speed vector 
Tensor 
Current speed vector 
