D-Geo Stability is a slope stability package for soft soils. Previous releases of D-Geo Stability were named MStab. Deltares systems tools follow best practice, and are developed according to modern software standards; therefore they are user-friendly and easy to learn.
Besides features generally found in other slope stability packages, D-Geo Stability offers several specific features for the design of river dikes and road embankments:
Integration with other Deltares products
Integration with the suite of other Deltares systems products. For example, settlements can be introduced using the D-Settlement program. In this way, safety analyses for various (settled) construction stages can be performed.
- The Reliability analyses module
The reliability module supports the Eurocode 7, allowing for the input of partial safety factors. A stochastic distribution of parameters allows for semi-probabilistic analysis as well as probabilistic analyses. Using the model default parameters for stochastic properties, the user can easily switch from a standard safety analysis to a reliability analysis without additional input data.
- Probabilistic Random Field method
Experts in probabilistic analysis can use the Bishop Probabilistic Random Field module, allowing users to take into account spatial variation of parameters.
- Uplift calculation
The Uplift module allows for the safety analysis of river embankments under the influence of changing water levels in aquifers. This may result in the uplift of the hinterland, a mechanism causing numerical difficulties in most FEM approaches.
- Integration with Watex
The movement of rising water levels as a result of extensive rainfall events is an important issue for river embankments. The Deltares Watex program allows for fast analysis, resulting in time dependant water pressure distributions that can be imported into D-Geo Stability .
How to get D-Geo Stability?
The latest fully validated release is D-Geo Stability 18.1. This version is available if you have purchased a Service package. You can order a Service packages via our Software sales Service team (firstname.lastname@example.org) The software can be downloaded via our Download portal. You don’t need a license file to do this. You can use the software in Demo mode without a license file.
By purchasing a Service package you will receive a license file to unlock full functionality (according to purchased package).
Our Software sales Service team will provide you with instructions on how to get the software working with a license file.
You can also use our Geotechnical software products via the internet (Software as a Service – SaaS), on subscription basis. For more information, please see Online Geotechnical Software.
D-Geo Stability – Bishop and Fellenius
The standard module contains the graphical user interface and an automatic slip circle determination for the lowest safety factor for both Bishop and Fellenius methods. The standard module provides an output report and tabulated and graphical output. Some specific features...
D-Geo Stability – Uplift
This module allows for the analysis of uplift stability, a mechanism responsible for failure of river embankments. The failure mechanism consists of a horizontal part, bounded by two circles (Uplift Van) or by one circle and a straight line (Uplift...
D-Geo Stability – Spencer
This module comprises the Spencer method that allows stability analysis for user-defined non-circular failure surfaces. Equilibrium is ensured for moments, vertical and horizontal forces. [caption id="attachment_2239" align="aligncenter" width="233"] D-Geo Stability, Spencer[/caption] Results per slice D-Geo Stability comes as a standard module, which can...
D-Geo Stability – Reliability Analyses
Standards such as the Eurocode 7 require the execution of a reliability analysis. Such an analysis takes into account the variation of strength and loading. With the Reliability module one can choose between the partial factors concept and a probabilistic...
D-Geo Stability – Probabilistic Random Field
The Bishop Random Field module aims at experts in probabilistic analysis. Compared to the Reliability Analyses module, the Probabilistic Random Field module offers the additional modelling of spatial variability in the plane and out of the plane, by using autocorrelation...
Demo / images
D-Geo Stability is available in the following Service packages:
- Bishop and Fellenius
- Reliability Analyses
- Probabilistic Random Field
The Educational package is the same as the Full package, but available at a reduced price.
How to order a Service package?
We are here to help you with all your Deltares software products and solutions.
Over the last decades, Deltares has been developing and improving D-Geo Stability, which comes with everything a modelling professional needs in a flexible, stable, robust, easy-to-use modelling suite. Deltares offers high quality software services to consultancy firms, governmental organizations, universities and research institutes worldwide, using these software products.
If you have a Service package and have a technical question, please contact our Support team via email@example.com (+ 31 (0)88 335 8100).
To obtain a Service package (license, Maintance & Support contract) for D-Geo Stability, please contact our Sales team via: firstname.lastname@example.org (+ 31 (0)88 335 8188).
If a vertical layer boundary coincides with one of the vertical boundaries of the horizontally compressed part of Uplift-Van model, the calculated pore pressures acting on the compressed area can be incorrect (equal to 0) because D-Geo Stability is not able to find the top and the bottom of the layer.
When the “Su-calculated with Yield stress” model is used, the program calculates a POP value for each yield measurement and then interpolates them to get a POP value for all the materials. In case a layer does not contain a yield measurement and the layers above and below this layer also don’t have a POP value, the POP value of the (horizontally) closest yield stress measurement should be used. However, this does not occur and the POP value of the considered layer stays at its default value (-1), which means an OCR of 1 and a yield stress equals to the effective stress.
Workaround: when using the “Su-calculated with Yield stress” model, make sure that all materials have at least one yield measurement.
In case the horizontal part of the Uplift-Van slip plane coincides with a layer boundary, for the slices along the horizontal part the program performs two calculations of the shear stress: one 2 cm above the bottom of the slice and one 2 cm below the bottom of the slice. The properties (c, phi, psi, Su, gamma) of the material leading to the minimum shear stress are used for the slice. However, this choice is not always correct because the program does not use the correct formula for the shear stress Tau:
– The dilatancy is not included in case of C-Phi model
The program uses
Tau = Cohesion + Effective stress * Phi
Tau = Cohesion + Effective stress * Tan (Phi)
Frequently asked questions
It is possible to open the input file of the program D-Geo Stability in the program MStab. However, the warning message ‘Input file was made with a more recent version of this program. Do you want to open it anyway?’ appears. Click on OK.
Note: the data of the new option (nails) will be lost.
Probably you are using an older version of the gef dll, for an update re-install the common files.
The figure in parentheses is the safety factor divided by the model factor. With the Uplift Van method, the model factor is 1.05.
The ‘Use MSeep Net’ option is probably switched on. You can switch it off in the ‘Water’ menu.
N.B. When ‘Use MSeep Net’ is switched on, the pn-lines will not be included in the calculation.
The option to export pictures in DXF format was developed for, and tested with, AutoCad 14. In more recent releases of AutoCad something has changed in relation to the import of DXF files. This means that these versions do not read our DXF files properly (detected by us in versions 2005 and 2006). The majority of viewers, for instance “Bentley view”, do not experience problems with our exported DXF files.
The Release Notes are part of the zip-file that contains the software and manual. This file can be downloaded at the Download portal.
- Operating systems:
- Windows 10 (version 1903)
- Hardware specifications:
- 1 GHz Intel Pentium processor or equivalent
- 512 MB of RAM
- 400 MB free hard disk space
- SVGA video card, 1024 768 pixels, High colors (16 bits)
|Version 188.8.131.52 (2018-01-19)|
Download Release notes D-Geo Stability 184.108.40.206