ALLCAP is a module of OPILE that can be used to easily compare the results for the axial capacity using different calculation methods.

All of the methods described in the Axial Soil Input section can be used. ALLCAP checks whether the stratigraphies defined in the axial soil input have been defined as sand or clay and replaces the method in a particular stratigraphy by the replacement method specified in ALLCAP. All of the defined axial methods in OPILE start with the letters “SAND” or “CLAY” and it is on this basis that the method is replaced with the SAND or CLAY replacement method defined in ALLCAP. It is unlikely that different sand or clay methods would be used to define different stratigraphies of the same pile and use of the methods in this way may be inconsistent with the way in which they were developed. ALLCAP allows up to 6 comparisons of pile capacity. For more information on this type of analyses see Morgan & Finnie (2006).

ALLCAP is used by selecting a series of replacement methods (see figure below) to define a replacement combination, which are then used to temporarily “replace” the main method as selected in the axial soil input. For each replacement method the pile skin friction, cumulative skin friction, end bearing and capacity for all penetrations are recalculated. If the soil stratigraphy layer includes sand and clay type soils then the user can choose to replace the SAND method, the CLAY method or both for each ALLCAP run.

The setting All “Other Axial Parameters” are taken into account during calculation means that all factors such as “Sand or Clay Friction Multipliers” or “End Bearing Smoothing Parameters” will be applied to all replacement combinations.

The table with target penetrations (see figure below) contains the pile penetrations (max. 6) for which the axial capacity calculations need to be performed. ALLCAP will automatically sort the pile penetrations from deepest to shallowest before performing any calculation.

The results from ALLCAP have no effect on pile structural modelling, although they can be included in the reports produced into Microsoft Word or Excel.


Example of ALLCAP input screen and results (from Worked Example 4 - Axial Clay Methods - Pentre).