Location

New York, New York

Session Start Date

4-13-2004

Session End Date

4-17-2004

Abstract

The engineering approach to design and specification development for a deep excavation is presented along with construction instrumentation data that illustrates the concepts, criteria, and performance of the excavation shoring system. The project included an excavation of up to about 20 m depth, over 650 m long, and 20 m wide made through generally competent glacial overburden with 46 structures located immediately adjacent to the excavation. Excavation support was achieved using a braced soldier-pile and lagging wall system. A detailed instrumentation program was undertaken by the owner to monitor contractor compliance with ground and structure movement criteria. Semi-empirical and theoretical concepts related to earth pressure diagrams and soldier-pile design "reduction factors" are explored in detail, with particular emphasis on contract provisions for specifying design of excavation support. The deformation performance, structural design, and construction pre-loading are shown to be directly linked an alternative approach is presented for future design and specification of excavation support.

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

Share

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

Design, Construction, and Performance of a Deep Braced Excavation

New York, New York

The engineering approach to design and specification development for a deep excavation is presented along with construction instrumentation data that illustrates the concepts, criteria, and performance of the excavation shoring system. The project included an excavation of up to about 20 m depth, over 650 m long, and 20 m wide made through generally competent glacial overburden with 46 structures located immediately adjacent to the excavation. Excavation support was achieved using a braced soldier-pile and lagging wall system. A detailed instrumentation program was undertaken by the owner to monitor contractor compliance with ground and structure movement criteria. Semi-empirical and theoretical concepts related to earth pressure diagrams and soldier-pile design "reduction factors" are explored in detail, with particular emphasis on contract provisions for specifying design of excavation support. The deformation performance, structural design, and construction pre-loading are shown to be directly linked an alternative approach is presented for future design and specification of excavation support.