Optimization of pile field structural calculations based on CPT data

Introduction. The current practice of pile foundation selection is a time-consuming, incoherent and non-standardized process. The aim of the study is to develop a methodology for optimizing structural calculations on the example of a pile field, based on cone penetration test data. For this purpose it is necessary: to prepare an algorithm for processing data from engineering-geological surveys; to develop a strictly deterministic process of justification of the best option depending on the cost of the pile foundation; to obtain a visual representation of the data for the possibility of verification of the selected solution.

Materials and methods. A genetic algorithm is used to optimize structural calculations of the pile field, which is implemented using the Galapagos plug-in based on the Grasshopper visual programming language. Python programming language is used to prepare initial data of geotechnical engineering surveys.

Results. Linked algorithms for cone penetration test data processing and preliminary estimation of the optimal pile foundation configuration based on its total cost, on the bearing capacity of the pile foundation soil were developed.

Conclusions. The developed algorithms can be used for preliminary calculation and rapid evaluation of pile foundation options. The required input data can be generated from calculation programmes. Alternatively, selection and optimization can be performed directly in Python code, using Grasshopper and Rhino only for force extraction and subsequent visualization of the results. Areas for further research and development include: consideration of layered geotechnical elements; estimation of the bearing capacity of each foundation footing independently and according to the underlying geotechnical elements; grouping of piles according to their position in the pile field and loads; consideration of the non-linear behaviour of the soil mass.

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