Calculation module(s) for lining / relining
IngSoft developed a module for the worksheet DWA-A 143-2 (2015 edition) that maps the verifications for the Host Pipe Conditions I-III using the finite element method (FEM) according to Theory II. Order.
For historical reasons, a module for leaflet ATV-M 127-2 is also available.
With the calculation module A 143-2 Basic, you can calculate all necessary load combinations including interaction up to Host Pipe Condition III (HPC III) for circular profiles within one calculation step. The program covers egg-shaped and circular liners in HPC I-II. Egg profiles in Host Pipe Condition III can be verified with the extension 'Egg-shaped cross-section in HPC III'.
The software for liner statics implements the semi-probabilistic partial safety concept of the regulations.
The software for liners also takes into account innovations compared to M 127-2, such as the shear check for lateral force. The interaction check can be replaced by simultaneous application of earth and water pressure in HPC III.
The scope of the calculation module M 127-2 basic is comparable to that of the calculation module A 143-2 basic, whereby the set of rules ATV-M 127-2 prescribes a global safety concept.
The DWA replaced the code of practice ATV-M 127-2 with the worksheet DWA-A 143-2 in July 2015.