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Accession Number:

AD1167482

Title:

Evaluation of Apartment Towers 1-4 and Parking Garages 1-4 at Camp Walker, Daegu, South Korea

Author(s):

Author Organization(s):

Report Date:

2022-04-01

Abstract:

In August of 2021, unexpected cracking was discovered in the concrete of newly constructed apartment towers and parking garages at Camp Walker, Daegu, South Korea. Initial evaluation by U.S. Army Corps of Engineers Far East District (USACE-POF) determined the towers to be safe for continued occupation. Out of an abundance of caution a team from the Engineer Research and Development Center (ERDC) conducted an independent evaluation of these structures to further verify life safety. Additionally, this evaluation sought to determine the potential causes of this cracking and remediation schemes both to inform future construction, but also to lay the groundwork for a more in-depth lifecycle evaluation by an Architectural/Engineering (AE) firm specializing in structural forensics. The ERDC evaluation consisted of on-site inspection, non-destructive testing, materials sampling and testing, and review of particular design and construction documentation provided by the Far East District. The results of the evaluation confirmed the Far East Districts findings that there was not a threat to life safety in these structures. Furthermore, the results of the ERDC evaluation indicated that drying shrinkage was the most likely causes of the observed cracking. In the areas where this cracking was the most severe, repair with epoxy injection was recommended for continued structural safety. In areas with moderate cracking, sealing of cracks was recommended to prevent long-term durability issues decreasing the lifespan of the structures.

Pages:

228

DOI:

10.21079/11681/44102

File Size:

55.49MB

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Distribution Statement:

Approved For Public Release

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