Numerical modelling of retaining structure displacements in multi-bench retained excavations

Zhou, Haizuo; Zheng, Gang; He, Xinping; Wang, En-yu; Guo, Zhiyi; Nie, Dongqing; Ma, Shangjun

doi:10.1007/s11440-020-00947-3

Cited by 44 publications

(5 citation statements)

References 33 publications

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“…A variance decomposition procedure (ANOVA) involved in the MARS model was used to calculate the generalized cross-validation (GCV) value of each input variable, which enables further evaluation of the relative importance index (RII). At present, MARS has been widely used for the curve fitting in multi-dimensions for various geotechnical applications (Zhang et al, 2019, Zheng et al, 2020, Zhou et al, 2020a, Lai et al, 2021. More details can be found in Zhang (2020).…”

Section: Methodology Of Marsmentioning

confidence: 99%

Undrained stability of pit-in-pit braced excavations under hydraulic uplift

et al. 2022

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Section: Methodology Of Marsmentioning

confidence: 99%

Undrained stability of pit-in-pit braced excavations under hydraulic uplift

et al. 2022

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“…The Multivariate Adaptive Regression Splines (MARS) method, introduced by Friedman [25], is a widely adopted non-parametric and non-linear statistical regression approach extensively utilized across diverse geotechnical engineering domains. Its applications encompass the prediction of liquefaction settlement during shallow foundation earthquakes [26], the estimation of displacements in multi-level support structures within excavations [27], and the assessment of spatially varying soil slope stability reliability [28]. The MARS model is constructed by a set of piecewise linear segments (splines) of different gradients, which are known as the basis functions (BFs) connected at knots.…”

Section: Response Surfacementioning

confidence: 99%

Evaluation of Critical Thresholds for Surrounding Rock Stability in TBM Tunnels Utilizing Limit State Analysis

Guo,

Yu,

Shi

et al. 2024

Buildings

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The safety and stability of tunnel construction are paramount concerns in tunnel engineering. Traditionally, the assessment of tunnel stability involves evaluating whether tunnel displacement and deformation velocities exceed acceptable thresholds, using specifications and analogical reasoning. However, standardized cautionary indicators often lack adaptability and can result in unnecessary reinforcement and increase economic costs. This study presents a method for determining limit displacement and deformation velocities based on tunnel deformation limit states. Based on the finite difference method, which considers the quality of surrounding rock mass and tunnel geometric configuration, a parametric analysis of these velocities is presented. The vault settlement, relative spandrel displacement, relative hance displacement, and deformation velocity are investigated to establish the thresholds for displacement and deformation velocities. Furthermore, a sensitivity analysis using a multivariate adaptive spline regression model is performed to measure the parameter effects on the early allowance values. Finally, a response surface method is developed to estimate the indicators in order to provide criteria for assessing and warning about surrounding rock stability. The obtained results show that the proposed limit state analysis method is effective for providing a standardized criterion for tunnel excavation, and the sensitivity analysis indicates tunnel depth as the most influential factor on tunnel reliability.

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“…In the geotechnical engineering field, many studies have made an effort to find soil parameters using the back-analyses method 6 ; Yapage, et al, 7 Li, et al, 8 Goh, et al, 9 Zhou, et al, 10 Ohtsu, et al, 11,12 Tang, et al, 13 Leon Bal and Meschke 14 used the finite-element program, for example, ABAQUS software and/or PLAXIS, for numerical modeling the soft soil improved by deep cement mixing (DCM) columns. 15 Waichita, et al 16,17 described the behavior of DCM columns-walled basement excavation and/or DCM columns under embankment load using PLAXIS 2D.…”

Section: Introductionmentioning

confidence: 99%

A nonlinear optimization method for calibration of large‐scale deep cement mixing in very soft clay deep excavation

To,

Minh,

Huynh

et al. 2024

Num Anal Meth Geomechanics

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This work proposes a novel technique to conduct back‐analysis of lateral displacement of deep cement mixing (DCM) columns in deep excavation construction. For the first time, we propose a process to investigate both soil and underground structure end‐to‐end automatically. The novel technique is a complex combination of three crucial factors: (1) a nature‐inspired optimization algorithm (O), (2) a three‐dimensional PLAXIS Geotechnical Engineering software (P) and (3) a modern Python language programming (P), hereinafter called the a nature‐inspired optimization algorithm (O), a three‐dimensional PLAXIS Geotechnical Engineering software (P) and a modern Python language programming (P) (OPP) technique. The novel meta‐heuristic algorithm simulated the co‐evolved partnership behavior of shrimps and goby fishes, termed Shrimp and Goby Association (SGA), which plays an important role in complex analyses. A series of exams to determine the SGA's performance is conducted on 38 benchmark test functions (IEEE Congress on Evolutionary Computation 2017 and 2019) and three real‐world engineering design problems to showcase its applicability. The metaheuristic and PLAXIS 3D analysis work well together, which makes the back‐analysis technique powerfully to determinate stiffness parameters instead of the traditional approaches. Based on the optimized parameters, the lateral deflection of DCM and soil are well predicted for excavation. This study proposes a technique to estimate efficiently the stiffness parameter for very soft soil. As a consequence of the optimization process, an equation to determine the stiffness parameter of DCM columns from laboratory test is also proposed. Based on the obtained results, this research provides a comprehensive methodology for predicting risk, enhancing safety, saving time and money, and effectively designing and constructing underground structures.

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Numerical modelling of retaining structure displacements in multi-bench retained excavations

Cited by 44 publications

References 33 publications

Undrained stability of pit-in-pit braced excavations under hydraulic uplift

Undrained stability of pit-in-pit braced excavations under hydraulic uplift

Evaluation of Critical Thresholds for Surrounding Rock Stability in TBM Tunnels Utilizing Limit State Analysis

A nonlinear optimization method for calibration of large‐scale deep cement mixing in very soft clay deep excavation

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