Support of Battery Energy Storage Systems with Helical Pile Foundations-PPT Presentation

PPT Presentation

Pdf Summary

The presentation discusses using helical pile foundations to support battery energy storage systems (BESS) and transformers. Helical piles are commonly selected for their rapid installation, sustainability, and cost-effectiveness. Typical designs use 2.875- to 4.5-inch-diameter shafts, with six or eight piles per equipment unit and approximate capacities of 15–20 kips in compression and 1–3 kips laterally.<br /><br />Design begins with equipment dimensions and weight, pile layout, and environmental loads. Structures are modeled in RISA 3D, with design based on the governing allowable-stress load combinations. Lateral performance often controls shaft size and depends on factors such as pile height above grade and pile-head fixity. LPile is used for lateral analysis, with deflection limits based on IBC Chapter 18. Helix size and quantity are adjusted to meet axial bearing requirements for the site soils.<br /><br />A test installation program—preferably conducted after grading—uses piles similar to the proposed design, with alternatives where appropriate. Test piles should be surveyed, and installation torque is reviewed against project requirements and equipment limits.<br /><br />A case history from Pecos County, Texas, covered 52 BESS units and 52 power conversion system units. The subsurface profile comprised silt to 3 feet, clay from 3 to 27 feet, and limestone below. The design used 9-foot-long, 2.75-inch-diameter shafts with an 8-inch dual-cutting helix and a 10-inch standard helix, for specified loads of 15 kips axial and 1.10 kips lateral.

Keywords

helical pile foundations

battery energy storage systems

transformer support

rapid installation

sustainable foundations

cost-effective design

lateral load analysis

RISA 3D

LPile software

Pecos County Texas