GeoStructPy
Changelog Main Menu
Disclaimer: This tool is intended for use by the APEC Consultancy team for preliminary geotechnical calculations only. The developers assume no liability for design decisions made based on the output of this application. All results must be verified by a qualified geotechnical or structural engineer before use in any project.

Micropile Design Calculator (Metric)

High-capacity small-diameter pile design per NSCP 2015, AISC 14th Edition, and ACI 318-14/19. Steel casing capacity is not included (potential corrosion). Reinforcing bar is at center of pile.

Section Properties

Soil & Embedment

LRFD Load Combinations

Enter factored loads for each combination. The governing (maximum) values will be used for design checks. Right-click to add/remove rows.

References & Methodology

  1. Poulos, H.G. & Davis, E.H. (1980). Pile Foundation Analysis and Design. John Wiley & Sons. Source for laterally loaded single-pile analysis (Broms / characteristic load and moment methods) and elastic settlement of piles.
  2. Das, B.M. & Sivakugan, N. (2019). Principles of Foundation Engineering, 9th Edition, SI. Cengage Learning. Ch. 12: §12.18 Elastic settlement of piles; §12.19 Laterally loaded piles.
  3. ACI Committee 318 (2019). Building Code Requirements for Structural Concrete (ACI 318-19): Ch. 22 (sectional strength), §22.5 (one-way shear), Ch. 10 (compression members).
  4. ACI Committee 318 (2014). ACI 318-14 — legacy reference for axial and flexural interaction.
  5. NSCP (2015). National Structural Code of the Philippines (7th ed.), Ch. 4 — Structural concrete and lateral soil pressure.
  6. AISC (2010). Steel Construction Manual, 14th ed. — Chapter E (compression) and Chapter D (tension), used for slenderness checks.
  7. FHWA (2005). Micropile Design and Construction Guidelines, FHWA-NHI-05-039.
  8. FHWA (2000). Micropile Design and Construction Guidelines — Implementation Manual, Bruce, D.A. & Juran, I., FHWA-SA-97-070.