HYLLA Tool

Rotationally Symmetric Pile Layout beneath Silo Foundations as a Preliminary Geometric Arrangement Proposal

Version v2026-07-15-01 · Calculation core 0.7.1

This tool creates an initial geometric layout of piles beneath circular or annular raft slabs. It provides the ring sequence, pile list, drawing and export files for further work.

The results are a geometric proposal and do not replace verifiable structural design or a project-specific engineering assessment. Settings are stored locally in the browser and can be deleted there. Drawing exports and printouts include the HYLLA logo and company information.

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Geometry

Outer diameter D outside [m] Inner circle D inside [m] Load-free slab overhang [m] Radius of outermost pile ring [m] Specify radius of outermost pile ring Create outer influence ring first with pile centered

Load and target value

Area load q [kN/m²] Maximum pile load N_max [kN] Max. influence area A_max [m²]

Optimization

Minimum pile spacing [m] Max. tangential spacing [m] Number of rings, 0 = automatic Max. rings in search Max. equal ring count Start inside min. piles Start inside max. piles Start with one pile in the center Offset adjacent rings

Display

Pile size D/a [m] Draw square piles Draw influence areas Label influence area Show pile numbers Label position at pile Ring number factor First ring number First pile number per ring