Location

New York, New York

Session Start Date

4-13-2004

Session End Date

4-17-2004

Abstract

The design, construction, and collapse of an excavation support system constructed through layered soils are presented in this paper. The braced soldier-pile and lagging shoring was installed through soft clay, with the base of the excavation in hard glacial deposits. Complicating factors included the use of soil berms for temporary support, construction sequencing, weather conditions, and the location of the failed section near a re-entrant corner of the shoring system. Rapid responses of all contract parties and careful evaluation of the failure causes limited subsequent safety and damage concerns, and no claims were made. Post-failure examination of the preceding events provides several insights into potential better specification practices. Theoretical comparison of soil strength and structural engineering principles demonstrate the true failure mechanisms in spite of several implied causes suggested at the outset of the investigation.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conference on Case Histories in Geotechnical Engineering

Meeting Name

Fifth Conference

Publisher

University of Missouri--Rolla

Publication Date

4-13-2004

Document Version

Final Version

Rights

© 2004 University of Missouri--Rolla, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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Apr 13th, 12:00 AM Apr 17th, 12:00 AM

Failure of an Excavation Support System

New York, New York

The design, construction, and collapse of an excavation support system constructed through layered soils are presented in this paper. The braced soldier-pile and lagging shoring was installed through soft clay, with the base of the excavation in hard glacial deposits. Complicating factors included the use of soil berms for temporary support, construction sequencing, weather conditions, and the location of the failed section near a re-entrant corner of the shoring system. Rapid responses of all contract parties and careful evaluation of the failure causes limited subsequent safety and damage concerns, and no claims were made. Post-failure examination of the preceding events provides several insights into potential better specification practices. Theoretical comparison of soil strength and structural engineering principles demonstrate the true failure mechanisms in spite of several implied causes suggested at the outset of the investigation.