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Erschienen in:

2020 | OriginalPaper | Buchkapitel

Probabilistic Stability Analysis of Conical Excavation

verfasst von : Koushik Halder, Debarghya Chakraborty

Erschienen in: Geotechnical Characterization and Modelling

Verlag: Springer Singapore

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Abstract

The present study pertains to the probabilistic analysis of conically shaped excavation in purely cohesive soil with the incorporation of the randomness of undrained shear strength of cohesive soil (C_u). Axisymmetric lower bound finite elements limit analysis technique is employed to compute the stability number (N_s = γH/C_u) of conical excavation which is a function of slope angle (β) and ratio of excavation height to bottom radius of the excavation (H/b). Failure probability (p_F) of the conical excavation is computed by using random field theory in conjugation with Monte Carlo simulation. Probabilistic design charts are presented for various combinations of coefficient of variation of C_u (CoV_cu), correlation distance (δ), β and H/b. Design charts indicate that the value of N_s increases with the increment in the value of H/b but reduces with the increase in slope inclination. The magnitude of p_F is found to be increasing with an increase in CoV_cu value for a particular value of δ.

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Titel: Probabilistic Stability Analysis of Conical Excavation
verfasst von: Koushik Halder
Debarghya Chakraborty
Verlag: Springer Singapore
Buch: Geotechnical Characterization and Modelling
Print ISBN: 978-981-15-6085-9

Electronic ISBN: 978-981-15-6086-6

Copyright-Jahr: 2020
DOI: https://doi.org/10.1007/978-981-15-6086-6_73

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