Location
New York, New York
Date
16 Apr 2004, 8:00am - 9:30am
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
Meeting Name
5th Conference of the International Conference on Case Histories in Geotechnical Engineering
Publisher
University of Missouri--Rolla
Document Version
Final Version
Rights
© 2004 University of Missouri--Rolla, All rights reserved.
Creative Commons Licensing
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.
Document Type
Article - Conference proceedings
File Type
text
Language
English
Recommended Citation
Boone, S. J. and Westland, J., "Design, Construction, and Performance of a Deep Braced Excavation" (2004). International Conference on Case Histories in Geotechnical Engineering. 29.
https://scholarsmine.mst.edu/icchge/5icchge/session05/29
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.
