Add additional parameters for the Global and Detailed assessment method.
Input screen for the 5 sets of parameters: Water, Revetment, Foreland, Soil and Influence zone
NOTE: The state parameter Ψ5m entered here is used in the Detailed check.
5.1 Water
Name in English | Name in Dutch | Description | Symbol | Unit | Default |
---|---|---|---|---|---|
Water level | Niveau water | The water level. | Zwater | m | 0.00 |
Unit weight of water | Soortelijk gewicht water | The unit weight of water. | γw | kN/m3 | 9.81 |
5.2 Revetment (Global assessment method)
Name in English | Name in Dutch | Description | Symbol | Unit | Default + decimals + (range)
|
---|---|---|---|---|---|
Revetment length dike top | Bekledingslengte vanaf buitenteen dijk | Horizontal projection of the length of the revetment, starting at dike toe at river side. | Mbestorting | m | 0.00 (0-10000) |
RX start bottom revetment | RX start vanaf geulbodem, onderste gedeelte van vooroever | Start co-ordinate of the revetment at the bottom of the channel. | Xstart;bestorting;onder | m | 0.00 (-10000-10000) |
Bottom revetment length | Bekledingslengte onderste gedeelte van vooroever | Horizontal projection of the length of the revetment at the bottom of the channel. | Mbestorting;onder | m | 0.00 (0-10000) |
5.3 Foreland (Global assessment method)
In case of non-natural deposited slopes, both Global and Detailed checks FAIL and it should immediately be switched to the advanced methods.
Name in English | Name in Dutch | Description | Default |
---|---|---|---|
Artificial and non-densified sandy foreland? | Is er sprake van een kunstmatig onder water aangebrachte en niet verdichte zandige of siltige vooroever? |
| No |
5.4 Soil (Global and Detailed assessment method)
Name in English | Name in Dutch | Description | Default |
---|---|---|---|
State parameter Psi 5m | State parameter Psi 5m | Parameter describes the state of the soil and is used in the Detailed check. | 0.0000 (-10-10) |
Sand type (particle size) | Zand type (korrelgrootte) | Parameter describes the type of sand and is used in the Global check (breach flow criteria is step 1e). Three types of sand are considered:
| Fine sand |
5.5 Distance dike toe/influence zone
Name in English | Name in Dutch | Description | Default |
---|---|---|---|
Distance dike toe / | Afstand buiten dijk / invloedslijn | Parameter describes the distance between the dike toe and the boundary of influence zone. it must always be less than the foreland length. | 0.00 (0-foreland length) |
D-Flow Slide is developed specifically for geotechnical engineers. It is a tool to perform a (semi-probabilistic) global and (probabilistic) detailed safety assessment on flow sliding in submerged slopes in front of flood defences. Moreover, it includes two advanced calculation models for analyzing static liquefaction and breach flow, that can be used for a tailor-made safety assessment, if the global and detailed assessments fail.
The graphical interfaces requires just a short training period, allowing users to focus their skill directly on the input of the geotechnical data and the subsequent evaluation of the calculated results.
Please double check always your input data of the advanced carefully and discuss the results with @Dick Mastbergen or @Geeralt van den Ham (Deltares)
In this paragraph the major input screens and windows are explained on the basis of a Tutorial (bm-1-1).
The input file can also be downloaded, if you have a legal version of the program.
Main Window: The Cross Section of the problem
All input windows can be found at the Menu bar.
Project contains all input windows for the different models. Only the soil parameters per layer has to be added in the Soil table
...
In this tutorial we start with the three standard models
The Soil table for the Global and Detailed models (check the filter) contains several parameters.
The description of all these parameters can be found on the page Input parameters.
Add a soilprofile by using de soillayers from the Soil Table.
...
Add a surface line.
The 5 characteristics point are obligated
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The description of these parameters can be found on the page Input parameters.
Add some additional parameters for the models.
| The detailed model needs some extra parameters. The probabilistic parameters are fixed, Only the Mean "Area ratio" can be changed.
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When all parameters have been inserted, you can start the calculation.
If one of the parameters are out of range, a validation message will be given in the table window
When no errors are found, the results are presented. In this case both the global and the detailed model fail.
In this case both standard models fail and the user have to use the advanced models.
The global results:
The detailed results can be found in two different windows:
The advanced models.
In case the global and detailed models both fail, we have to perform an analysis with the advanced models for static liquefaction and/or breach flow.
Select the Advanced models for static liquefaction (Sliq2D) and breach flow (HMBreach) at Project Info and 5 Charts will be shown.
Check the addional soil table parameters for liquefaction: (Set the filter in the soil table on Advanced Liquefaction)
Check the addional soil table parameters for breach flow: (Set the filter in the soil table on Advanced Breaching)
Additional parameters for liquefaction
Additional parameters for breach flow
Restart the calculation. In this case the advanced models indicate no failure of the embankment (both are green).
Download the file of this tutorial to check your legal version.