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Article

Enhancing Deep Excavation Optimization: Selection of an Appropriate Constitutive Model

1
Department of Civil Engineering, Pulchowk Campus, IOE, Tribhuvan University, Lalitpur 44600, Nepal
2
Department of Civil Engineering, Southern Illinois University, Edwardsville, IL 62026, USA
3
Department of Civil and Environmental Engineering, University of Toledo, Toledo, OH 43606, USA
4
Geotechnology LLC, 1780 Carillon Blvd, Cincinnati, OH 45240, USA
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
CivilEng 2024, 5(3), 785-800; https://doi.org/10.3390/civileng5030041
Submission received: 14 July 2024 / Revised: 30 August 2024 / Accepted: 7 September 2024 / Published: 16 September 2024

Abstract

To minimize the impact on nearby structures during deep excavations, choosing an appropriate soil constitutive model for analysis holds significant importance. This study aims to conduct a comparative analysis of various constitutive soil models—namely, the Mohr–Coulomb (MC) model, the hardening soil (HS) model, the hardening soil small strain (HSS) model, and the soft soil (SS) model—to identify the most suitable model for the lacustrine deposit. To implement these models, the soil’s index properties and mechanical behavior were evaluated from undisturbed soil samples. The numerical simulation and verification of these properties were carried out by comparing the laboratory test results with the outcome of the finite element method; the most suitable constitutive soil model for the soil was identified as the HSS model. Upon analyzing the wall deflection and ground settlement profiles obtained from respective constitutive models, it was observed that the HS and HSS models exhibit similar characteristics and are well-suited for analyzing typical lacustrine soil. In contrast, the MC and SS models yield overly optimistic results with lower wall deflection and ground settlement and fail to predict realistic soil behavior. As a result, this research highlights the significance of selecting the appropriate constitutive soil model and refining the parameters. This optimization process contributes significantly to the design of support systems, enhancing construction efficiency and ensuring overall safety in deep excavation projects.
Keywords: deep excavation; finite element method; lacustrine soil; constitutive model deep excavation; finite element method; lacustrine soil; constitutive model

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MDPI and ACS Style

Dahal, B.K.; Regmi, S.; Paudyal, K.; Dahal, D.; KC, D. Enhancing Deep Excavation Optimization: Selection of an Appropriate Constitutive Model. CivilEng 2024, 5, 785-800. https://doi.org/10.3390/civileng5030041

AMA Style

Dahal BK, Regmi S, Paudyal K, Dahal D, KC D. Enhancing Deep Excavation Optimization: Selection of an Appropriate Constitutive Model. CivilEng. 2024; 5(3):785-800. https://doi.org/10.3390/civileng5030041

Chicago/Turabian Style

Dahal, Bhim Kumar, Sandip Regmi, Kalyan Paudyal, Diwash Dahal, and Diwakar KC. 2024. "Enhancing Deep Excavation Optimization: Selection of an Appropriate Constitutive Model" CivilEng 5, no. 3: 785-800. https://doi.org/10.3390/civileng5030041

APA Style

Dahal, B. K., Regmi, S., Paudyal, K., Dahal, D., & KC, D. (2024). Enhancing Deep Excavation Optimization: Selection of an Appropriate Constitutive Model. CivilEng, 5(3), 785-800. https://doi.org/10.3390/civileng5030041

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