Reliability-Based Design of Basal Heave Stability for Braced Excavation Using Three Different Methods

Wan Huan Zhou*, Yu Mu, Xiao Hui Qi, Shuaidong Yang

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Citation (Scopus)

Abstract

Terzaghi’s (T), Bjerrum-Eide’s (BE) and the slip circle (SC) methods are widely used to evaluate the basal heave stability in reliability-based design of braced excavations. The three methods produce different reliabilities for the same excavation problem. It is still unclear which of these methods is most conservative or most economical. Hence, this study compares the reliabilities of basal heave stability for the three methods for both wide and deep excavations. The probability of failure (Pf) for a given factor of safety (FS) and coefficient of variation (COV) for soil parameters is calculated using the first-order reliability method. The Pf − FS design charts for different methods are compared. The results demonstrate that the SC method is more conservative than the other two methods. For wide excavations, the same level of the factor of safety results in a much smaller Pf for the SC method than for the T method. For deep excavations, the Pf for the SC method is also smaller than for BE method. In addition, the Pf − FS design curves for T are more sensitive to the penetration depth of the wall than the other two methods. These results serve as a guideline for the method selection of basal heave stability evaluation in geotechnical practice.

Original languageEnglish
Title of host publicationProceedings of the 2nd International Symposium on Asia Urban GeoEngineering
EditorsChangyu Ou, Renpeng Chen, Gang Zheng
Place of PublicationSingapore
PublisherSpringer
Pages273-283
Number of pages11
Edition1
ISBN (Electronic)9789811066320
ISBN (Print)9789811349195, 9789811066313
DOIs
Publication statusPublished - 2018
Externally publishedYes
Event2nd International Symposium on Asia Urban GeoEngineering, 2017 - Changsha, China
Duration: 24 Nov 201727 Nov 2017

Publication series

NameSpringer Series in Geomechanics and Geoengineering
PublisherSpringer
Number204379
ISSN (Print)1866-8755
ISSN (Electronic)1866-8763

Conference

Conference2nd International Symposium on Asia Urban GeoEngineering, 2017
Country/TerritoryChina
CityChangsha
Period24/11/1727/11/17

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