The Ballpark Village Development Deep Foundation System - Design Build at Its Best-PPT Presentation

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The Ballpark Village Block 400 and Block 100 projects used design-build contracts to deliver augercast-in-place (ACIP) pile foundations. Driven piles and drilled shafts were also considered, but ACIP piles were selected as the preferred system. The combined deep-foundation package was valued at $7.4 million.<br /><br />At Block 400, 383 piles were installed, generally 24 inches in diameter and extending about 94 feet below working grade. Their design compression capacity was 924 kips. At Block 100, 30-inch-diameter piles ranged from 50 to 88 feet deep and were designed for 1,178 kips. At both sites, piles were drilled to refusal on rock, with an allowable end-bearing value of 180 ksf. Additional rock coring verified subsurface conditions.<br /><br />Osterberg-cell load tests at each site helped confirm and refine design assumptions; the Block 400 test exceeded three times the design load. Installation criteria were established using the test piles. Crews documented installation with a pile installation recording system, and some locations required pre-drilling through existing foundations. The work also involved different rig setups and deep pile cutoffs.<br /><br />Construction challenges included equipment and tooling damage, obstructions from existing shallow foundations and abandoned utilities, and a questionable integrity-test result for Pile 74. Dynamic testing did not resolve the concern, so the pile was statically load-tested.<br /><br />Overall, the projects demonstrate how collaborative design-build delivery, site-specific testing, and close installation monitoring supported the use of ACIP piles in a challenging urban setting.

Keywords

Ballpark Village

design-build

ACIP piles

augercast-in-place

deep foundations

Osterberg-cell load test

pile foundations

rock coring

dynamic testing

load-tested pile