Optimal geotechnical site investigations for slope design

Yang, Rui; Huang, Jinsong; Griffiths, D. V.; Meng, Jingjing; Fenton, Gordon A.

Title: Optimal geotechnical site investigations for slope design
Creator: Yang, Rui; Huang, Jinsong; Griffiths, D. V.; Meng, Jingjing; Fenton, Gordon A.
Relation: ARC.DP190101592 http://purl.org/au-research/grants/arc/DP190101592
Relation: Computers and Geotechnics Vol. 114, Issue October 2019, no. 103111
Publisher Link: http://dx.doi.org/10.1016/j.compgeo.2019.103111
Publisher: Elsevier
Resource Type: journal article
Date: 2019
Description: Site investigation in combination with field and laboratory testing, plays a vital role in characterizing the soil profile for geotechnical design in order to reduce uncertainty. In spite of this, site investigations are often limited in scope due to high costs. In this paper, conditional random fields are used to examine the influence of soil strength mean, standard deviation and spatial correlation length on the risk of slope design failure for different levels of site investigation scope. An undrained slope example is used to illustrate how the proposed approach can be used to assess the risk reduction that can be obtained as the scope of a site investigation is increased. By combining the cost of site investigation with the cost of slope failure, the results indicate that there exists an optimal site investigation scope, beyond which the cost of additional boreholes does not justify the cost savings due to reduced slope failure risk.
Subject: geotechnical site investigation; sampling strategy; risk analysis; conditional random field
Identifier: http://hdl.handle.net/1959.13/1464022
Identifier: uon:46893
Identifier: ISSN:0266-352X
Language: eng
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