1D Bridges: Difference between revisions
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*Link to 2D section – this section explains 1D bridges only.
*Advice on when you would model a 1D bridge versus a 2D bridge (read module 6).
*Examples on a XZ and HW bridge type – pictures & csv examples▼
*Information on the checks you can carry out
*Method A & Method B for bridges – refer to Bill’s post on 1.56 value
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=Irregular shaped bridges=
In the UK arch shaped bridges can often be seen on waterways, whereas in Australia these types of structures are quite uncommon. Modelling an irregular/arch shaped bridges utilises the hydraulic properties elevation-width (CS/HW) type cross section. <br>
1. Create a 1d_tab HW (height vs width) .csv file for each standard shape (ie. set up a database of the egg-shapes). For the height value you can start at a value of zero so that height becomes depth (this might making the .csv files easier).
2. Any number of 1d_tab lines can reference the same .csv file, ie. you don't need to have a unique .csv file for every 1d_tab line.
3. One option is to copy and paste the 1d_tab lines across each pipe (if you use a two vertex 1d_tab line there is no requirement that the 1d_tab line is snapped to the 1d_nwk pipe line - they just need to intersect). Each line will need to reference the relevant standard egg-shape HW .csv file (this could be automated using SQL Select if you have an attribute on the pipe to indicate which egg-shape it is).
3. The inverts of the pipes should raise or lower the standard egg-shape cross-section to the appropriate height.
<br>
▲*Examples on a XZ and HW bridge type – pictures & csv examples
<br>
=Typical checks=
The table below highlights some of the commonly used check files when reviewing 1D bridges. The full list of TUFLOW check files can be found [[TUFLOW_Check_Files | here]].
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