Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/86642
Title: Deterministic and reliability assessment of basal heave stability for braced excavations with jet grout base slab
Authors: Goh, Anthony Teck Chee
Keywords: Basal Heave
Braced Excavation
Issue Date: 2017
Source: Goh, A. T. C. (2017). Deterministic and reliability assessment of basal heave stability for braced excavations with jet grout base slab. Engineering Geology, 218, 63-69.
Series/Report no.: Engineering Geology
Abstract: For braced excavations in deep deposits of soft clays, it is common to construct a jet grout slab (JGP) beneath the excavation in order to restrain the wall deformation, reduce the forces acting on the struts and to increase the basal heave factor of safety. In this paper, finite element analyses were carried out to assess the basal heave factor of safety for excavations in soft clays supported by JGP. The finite element analyses indicate that the interface friction between the jet grout slab and the wall is a key component contributing to the resistance of the excavation system to basal heave failure. Comparison of the factor of safety from the finite element analyses with limit equilibrium predictions based on the slip circle method and the modified Terzaghi method was then performed. Since the conventional factor of safety approach does not explicitly reflect the uncertainties of the soil and JGP properties, and the excavation geometry on the excavation system performance, a series of reliability analyses were also carried out to assess the basal heave factor of safety for excavations supported by JGP. The provided spreadsheet template can be used to estimate the probability of basal heave failure for deep excavations supported by jet grout slabs.
URI: https://hdl.handle.net/10356/86642
http://hdl.handle.net/10220/44139
ISSN: 0013-7952
DOI: 10.1016/j.enggeo.2016.12.017
Rights: © 2017 Elsevier B.V. This is the author created version of a work that has been peer reviewed and accepted for publication by Engineering Geology, Elsevier B.V. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [http://dx.doi.org/10.1016/j.enggeo.2016.12.017].
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:CEE Journal Articles

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