![](https://scdn.x-mol.com/css/images/icon-new-link.png)
样式: 排序: IF: - GO 导出 标记为已读
-
An improved discretization‐based kinematic approach for stability analyses of nonuniform c‐φ soil slopes Int. J. Numer. Anal. Methods Geomech. (IF 3.4) Pub Date : 2024-07-18 Hongyu Wang, Lingchao Meng, Changbing Qin
This paper proposes an improved discretization‐based kinematic approach (DKA) with an efficient and robust algorithm to investigate slope stability in nonuniform soils. In an effort to ensure rigorous upper‐bound solutions which may be not satisfied by the initial DKA based on a forward difference method (DKA‐FD), a central and backward difference “point‐to‐point” method (DKA‐CD and DKA‐BD) is proposed
-
Interfacial flow contact resistance effect for thermal consolidation of layered viscoelastic saturated soils with semi‐permeable boundaries Int. J. Numer. Anal. Methods Geomech. (IF 3.4) Pub Date : 2024-07-18 Jiahao Xie, Minjie Wen, Pan Ding, Yuan Tu, Dazhi Wu, Kaifu Liu, Kejie Tang, Menghuan Chen
Laminar flow phenomena may occur when pore water flows at low velocities across the interfaces between soils of different properties, thus causing flow contact resistance. To explore the impacts of interfacial flow contact resistance and rheological characteristics on the thermal consolidation process of layered viscoelastic saturated soil foundation featuring semi‐permeable boundaries. This paper
-
Granular material regime transitions during high energy impacts of dry flowing masses: MPM simulations with a multi‐regime constitutive model Int. J. Numer. Anal. Methods Geomech. (IF 3.4) Pub Date : 2024-07-18 Pietro Marveggio, Matteo Zerbi, Irene Redaelli, Claudio di Prisco
The dynamic interaction between granular flowing masses and rigid obstacles is a complex phenomenon characterised by both large displacements and high strain rates. In case the flowing mass is modelled as a continuum, its numerical simulation requires both advanced computational tools and constitutive relationships capable of predicting the mechanical behaviour of the same material under both fluid
-
Analytical modeling and experiments on soft soil consolidation with vacuum preloading‐airbag pressurization Int. J. Numer. Anal. Methods Geomech. (IF 3.4) Pub Date : 2024-07-17 Hongping Meng, Aifang Qin, Lianghua Jiang, Yajun Wu
This study aims to provide substantial theoretical support for employing vacuum preloading‐airbag pressurization (VP‐AP) to enhance soft soil foundations. By integrating the airbags and prefabricated vertical drains (PVDs) within the analytical framework, the consolidation models are developed to accommodate double smear zones and well resistance. Analytical solutions for various airbag pressurization
-
Soil arching evolution in GRPS embankments: Numerical spring‐based trapdoor tests Int. J. Numer. Anal. Methods Geomech. (IF 3.4) Pub Date : 2024-07-17 Ling Zhang, Mengchao Deng, Jie Zhou, Zeyu Xu, Shuai Zhou, Yunhao Chen
Soil arching is one of the main load transfer mechanisms of geosynthetic‐reinforced and pile‐supported (GRPS) embankments. This study established a numerical spring‐based trapdoor model that can consider the coupling effect between embankment filling, horizontal geosynthetic, piles, and soft soil between piles by the discrete element method (DEM). The effects of multiple factors on the deformation
-
Coupled finite element analysis of the dynamics of poroelastic media considering the relative fluid acceleration Int. J. Numer. Anal. Methods Geomech. (IF 3.4) Pub Date : 2024-07-17 Jiawei Xu, Ryosuke Uzuoka, Kyohei Ueda
This paper mainly discusses the dynamics of poroelastic media using the finite element analysis based on the u‐v‐p full formulation, where , , and p denote the solid displacement, relative fluid velocity with respect to solid velocity, and pore fluid pressure. It incorporates the effect of relative fluid acceleration with respect to solid acceleration on soil dynamic response. The ‐‐p formulation is
-
A multiobjective optimization framework for site investigation program based on Bayesian approach and NSGA‐II Int. J. Numer. Anal. Methods Geomech. (IF 3.4) Pub Date : 2024-07-16 Yang Sun, Ziying Xu, Jinshan Sun, Zhen Chen
Site investigation provides essential geotechnical parameter information for analysis and design. However, three conflicting objectives, namely exploration effort, robustness and parameter uncertainty, pose a challenge to the development of an optimal site investigation program. In this study, a three objective optimization framework for the site investigation program is proposed based on the Bayesian
-
-
Multi‐scale mechanics of polydisperse granular materials: From micro‐scale and wave propagation experiments to DEM analysis Int. J. Numer. Anal. Methods Geomech. (IF 3.4) Pub Date : 2024-07-04 Nallala S. C. Reddy, Huan He, Kostas Senetakis
This paper presents a multiscale experimental study integrated with numerical simulations examining the mechanics of polydisperse granular mixtures composed of coarse‐grained particles mixed with varying percentages of fines. The study includes macroscale wave propagation tests using bender elements on isotopically compressed granular samples to investigate the stiffness variation with changes in size
-
A two‐stage combined filtration‐consolidation model for slurry ground treated by vacuum preloading Int. J. Numer. Anal. Methods Geomech. (IF 3.4) Pub Date : 2024-07-03 Xiaoqian Ye, Li Shi, Yuanqiang Cai
The vacuum preloading technique is extensively employed for ground improvement, particularly for slurry ground characterized by high‐water content and low strength. Such ground frequently exhibits a delay in pore water pressure dissipation when treated with prefabricated vertical drains. To clarify the drainage and consolidation behaviour of high‐water content slurry ground under vacuum preloading
-
Coupled model for electro‐osmosis consolidation and ion transport considering chemical osmosis in saturated clay soils Int. J. Numer. Anal. Methods Geomech. (IF 3.4) Pub Date : 2024-07-03 Shangqi Ge, Wenhao Jiang, Ji‐Peng Wang, Guohui Feng, Lingwei Zheng, Xinyu Xie
The electro‐osmosis approach efficiently facilitates the rapid dewatering of soil with high water content and contributes to reducing contaminant levels within the clay soil. However, the changes of chemical field caused by ion transport in the clay soil during electro‐osmosis process will also influence the clay soil consolidation effect. Existing theories predominantly tend to disregard this crucial
-
Elastoplastic constitutive model for overconsolidated clays with an advanced dilatancy relation Int. J. Numer. Anal. Methods Geomech. (IF 3.4) Pub Date : 2024-07-03 Kehao Chen, Rui Pang, Bin Xu, Xingliang Wang
The dilatancy behavior of overconsolidated (OC) clays is a key factor in determining their strength and deformation characteristics. Recognizing the limitations of previous dilatancy relations for OC clays, a novel dilatancy relation is proposed that can effectively capture the changes in dilatancy point, volume dilatancy and contraction with the overconsolidation ratio (OCR). As OC clays revert to
-
Application of factorization machine with quantum annealing to hyperparameter optimization and metamodel‐based optimization in granular flow simulations Int. J. Numer. Anal. Methods Geomech. (IF 3.4) Pub Date : 2024-06-25 Junsen Xiao, Katsuhiro Endo, Mayu Muramatsu, Reika Nomura, Shuji Moriguchi, Kenjiro Terada
This study examined the applicability of factorization machines with quantum annealing (FMQA) to the field of landslide risk assessment for two specific black‐box optimization problems, hyperparameter optimization (HPO) for metamodeling and metamodel‐based simulation optimization (MBSO) targeting granular flow simulation using discrete element method (DEM). These two optimization problems are solved
-
Collapse characteristics of binary granular columns considering inhomogeneous particle size distributions Int. J. Numer. Anal. Methods Geomech. (IF 3.4) Pub Date : 2024-06-25 Hao Sun, Jun‐Ze Jia, François Nicot, Xiao‐Xiao Wang, Li‐Shan Zhao
Debris avalanches and dry granular flows exhibit similar characteristics. In order to comprehend the fundamental mechanisms and improve the accuracy in predicting disasters such as landslides, debris flows, and rock avalanches, the collapse characteristics of a binary granular column are investigated through a three‐dimensional discrete element model. A novel approach is proposed by incorporating the
-
Competition among simultaneously stimulated multiple hydraulic fractures: Insights from DEM simulation with the consideration of fluid partitioning Int. J. Numer. Anal. Methods Geomech. (IF 3.4) Pub Date : 2024-06-22 Xuejian Li, Kang Duan, Moli Zhao, Qiangyong Zhang, Luchao Wang, Rihua Jiang
Stimulating long and persistent fractures from multiple perforations in horizontal wells plays a vital role in enhancing the recovery of hydrocarbons from unconventional reservoirs. However, interaction among fractures may lead to dramatic nonuniformity, but the mechanism that drives the competition still eludes explanation. We proposed an improved two‐dimensional discrete element model to simulate
-
Emergence of critical state in granular materials using a variationally‐based damage‐elasto‐plastic micromechanical continuum model Int. J. Numer. Anal. Methods Geomech. (IF 3.4) Pub Date : 2024-06-22 Nurettin Yilmaz, M. Erden Yildizdag, Francesco Fabbrocino, Luca Placidi, Anil Misra
The mechanical response of granular materials, exemplified by frictional grain interactions, is characterized by a critical state in which deformation occurs without change of material volume or stresses when subjected to large shear deformation. In this work, a granular micromechanics approach (GMA) based continuum model is used to investigate the emergence of such a critical state. The continuum
-
Multi‐objective reliability‐based robust design for a rock tunnel support system using Pareto optimality Int. J. Numer. Anal. Methods Geomech. (IF 3.4) Pub Date : 2024-06-21 Zheming Zhang, Sikan Li, Yu Zhang, Yifeng Zhou, Jian Ji
In the context of rock material and modeling uncertainties, the optimization of rock tunnel support systems is often conducted by selecting the most cost‐effective solution among several feasible options that typically rely on the engineer's experience, potentially leading to overlooking the most optimal design. To improve such a limitation, this paper presents a multi‐objective reliability‐based robust
-
Thermo‐hydro‐mechanical coupled material point method for modeling freezing and thawing of porous media Int. J. Numer. Anal. Methods Geomech. (IF 3.4) Pub Date : 2024-06-21 Jidu Yu, Jidong Zhao, Shiwei Zhao, Weijian Liang
Climate warming accelerates permafrost thawing, causing warming‐driven disasters like ground collapse and retrogressive thaw slump (RTS). These phenomena, involving intricate multiphysics interactions, phase transitions, nonlinear mechanical responses, and fluid‐like deformations, and pose increasing risks to geo‐infrastructures in cold regions. This study develops a thermo‐hydro‐mechanical (THM) coupled
-
Analytical poro‐elastic solution of deep lined tunnels in anisotropic rock with consideration of tunnel face advance Int. J. Numer. Anal. Methods Geomech. (IF 3.4) Pub Date : 2024-05-29 Nam‐Hung Tran, Duc‐Phi Do, Dashnor Hoxha, Minh‐Ngoc Vu, Thi‐Thu‐Nga Nguyen
This paper aims at deriving a closed‐form solution for deep lined tunnels within a saturated anisotropic poro‐elastic medium. The derivation of the solution is carried out with the assumption of plane strain conditions along the tunnel axis, an isotropic elastic liner, a steady‐state flow, and perfect contact between the liner and rock. For this purpose, the complex potential function approach pioneered
-
A shear‐transformation‐zone model for time‐dependent behaviours of clay Int. J. Numer. Anal. Methods Geomech. (IF 3.4) Pub Date : 2024-05-28 Ning Guo, Wenlong Li, Zhongxuan Yang
A shear‐transformation‐zone (STZ) model is proposed for time‐dependent behaviours of clay, in which the viscoplastic deformation is described by the evolution of a temperature‐like state variable. The model is featured by rate‐dependent dilatancy and a unique critical state stress ratio. In its present form, it has nine parameters, most of which can be handily calibrated, and can predict the rate‐dependent
-
Hydromechanical analysis of slurry infiltration with coupled CFD–DEM method Int. J. Numer. Anal. Methods Geomech. (IF 3.4) Pub Date : 2024-05-28 Yang Cheng, Tuo Wang, Pei Wang, Su Qin, Wan‐Huan Zhou, Zhen‐Yu Yin
The tunnel face stability is closely related to the migration behavior and clogging mechanism of the slurry particles in granular soils, which is not yet fully understood. In this study, the coupled computational fluid dynamics–discrete element method (CFD–DEM) is adopted to investigate the infiltration behavior of slurry at the particle scale. The full Johnson–Kendall–Roberts (JKR) contact model describing
-
A novel analytical approach to vertical dynamic vibration of pipe‐pile groups considering soil‐plug effect Int. J. Numer. Anal. Methods Geomech. (IF 3.4) Pub Date : 2024-05-28 Kun Meng, Xiubing Li, Chunyi Cui, Mingchen Zhong, Hailong Liu
A novel pile‐to‐pile interaction model for pipe piles that considers the soil‐plug effect is established based on the Novak plane‐strain soil model. Subsequently, the pipe‐pile dynamic interaction factor and dynamic impedance of pipe‐pile groups are derived using the superposition method. The accuracy of the proposed analytical solution is confirmed by comparison with experimental results and existing
-
Simplified method for estimating the impact of the underlying tunnel excavation on existing tunnel Int. J. Numer. Anal. Methods Geomech. (IF 3.4) Pub Date : 2024-05-27 Guohui Feng, Changjie Xu, Zhi Ding, Luju Liang, Yujie Li, Liyang Xu, Xiaozhen Fan
Tunneling underneath is bound to induce the free displacement of surrounding soil, which will further significantly affect the overlying tunnel's deformation. Based on this, a simplified method for calculating the deformation of the overlying tunnel due to shield tunnel excavation is proposed. Firstly, the Loganathan formula is selected to solve the additional stress along the pre‐existing tunnel induced
-
Data‐driven nonlocal model for fragmentation in the crushing of solids Int. J. Numer. Anal. Methods Geomech. (IF 3.4) Pub Date : 2024-05-20 Stewart A. Silling
A technique is proposed for reproducing particle size distributions in three‐dimensional simulations of the crushing and comminution of solid materials. The method is designed to produce realistic distributions over a wide range of loading conditions, especially for small fragments. In contrast to most existing methods, the new model does not explicitly treat the small‐scale process of fracture. Instead
-
An enhanced micromechanical rock–pile interface model with application to rock‐socketed pile modeling Int. J. Numer. Anal. Methods Geomech. (IF 3.4) Pub Date : 2024-05-16 Rui Liang, Zhen‐Yu Yin, Jian‐Hua Yin, Pei‐Chen Wu, Ze‐Jian Chen
The increasing use of rock‐socketed piles highlights the importance of developing a suitable design method for their bearing capacity. This study quantifies the shear behavior of the rock–pile interface, which generally dominates the bearing capacity of rock‐socketed piles under service load. A micromechanics‐based rock–pile interface model with idealized nonuniform profile is proposed with two enhancements:
-
Finite element modeling of thermal‐hydro‐mechanical coupled processes in unsaturated freezing soils considering air‐water capillary pressure and cryosuction Int. J. Numer. Anal. Methods Geomech. (IF 3.4) Pub Date : 2024-05-15 Emad Norouzi, Biao Li
This paper presents a comprehensive computational model for analyzing thermo‐hydro‐mechanical coupled processes in unsaturated porous media under frost actions. The model employs the finite element method to simulate multiphase fluid flows, heat transfer, phase change, and deformation behaviors. A new soil freezing characteristic curve model is proposed to consider the suctions from air‐water capillary
-
An extended graphical solution for undrained cylindrical cavity expansion in K0‐consolidated Mohr–Coulomb soil Int. J. Numer. Anal. Methods Geomech. (IF 3.4) Pub Date : 2024-05-15 Xu Wang, Sheng‐Li Chen, Yan‐Hui Han, Younane N. Abousleiman, Hai Lin
This paper develops a general and complete solution for the undrained cylindrical cavity expansion problem in nonassociated Mohr‐Coulomb soil under nonhydrostatic initial stress field (i.e., arbitrary values of the earth pressure coefficient), by expanding a unique and efficient graphical solution procedure recently proposed by Chen and Wang in 2022 for the special in situ stress case with . It is
-
A semi‐analytical model for coupled THM consolidation of saturated clays improved by PVTD considering thermal contraction Int. J. Numer. Anal. Methods Geomech. (IF 3.4) Pub Date : 2024-05-07 Yi Tian, Guosheng Jiang, Yue Gui, Minjie Wen, Guoxiong Mei, Wenbing Wu, Yi Zhang
Previous studies have demonstrated that saturated normally consolidated and lightly over‐consolidated clays undergo contraction when heated due to a reduction in preconsolidation pressure. A linear constitutive model is proposed to describe the thermal contraction, with this model, governing equations are developed for the coupled thermo‐hydro‐mechanical (THM) consolidation induced by a prefabricated
-
Effect of soil layering and interface resistance on electro‐osmotic consolidation of layered soils: A Green's function approach Int. J. Numer. Anal. Methods Geomech. (IF 3.4) Pub Date : 2024-05-06 Zhang‐Long Chen, Jian‐Ping Li, Yun‐Shan Xu, Jun Liu, Shun Wang
During electro‐osmotic consolidation, effective voltage attenuation induced by the increasing interface resistance is an important phenomenon, which significantly decreases consolidation effectiveness. This paper presents an analytical model for one‐dimensional electro‐osmotic consolidation in layered soils with horizontal graphite electrodes considering effective voltage attenuation. The mathematical
-
-
Modeling dynamic crack branching in unsaturated porous media through multi‐phase micro‐periporomechanics Int. J. Numer. Anal. Methods Geomech. (IF 3.4) Pub Date : 2024-05-03 Hossein Pashazad, Xiaoyu Song
Dynamic crack branching in unsaturated porous media holds significant relevance in various fields, including geotechnical engineering, geosciences, and petroleum engineering. This article presents a numerical investigation into dynamic crack branching in unsaturated porous media using a recently developed coupled micro‐periporomechanics (PPM) paradigm. This paradigm extends the PPM model by incorporating
-
A framework for estimating the matric suction in unsaturated soils using multiple artificial intelligence techniques Int. J. Numer. Anal. Methods Geomech. (IF 3.4) Pub Date : 2024-05-03 Junjie Wang, Sai Vanapalli
Implementation of the state‐of‐the‐art understanding of the mechanics of unsaturated soils into geotechnical engineering practice is partly limited due to the lack of quick, reliable, and economical techniques for matric suction measurement. Matric suction is one of the key stress state variables that significantly influences the hydro‐mechanical behavior of unsaturated soils. In this paper, to address
-
Modified SANISAND‐F model for simple shear path Int. J. Numer. Anal. Methods Geomech. (IF 3.4) Pub Date : 2024-04-30 Xingbo Huang, Yifei Sun, Chenglong Gu
Simple shear behavior of sand is representative in geotechnical engineering with potential failure occurred along a thin shear zone. The strength and deformation of sand under simple shear are accompanied with principal stress rotation (PSR). This study proposes a modified SANISAND‐F model to capture the simple shear behavior of sand with PSR. A new plastic flow rule along with a kinematic hardening
-
The mechanism of granite breaking by electric pulse under high temperature and high pressure environment Int. J. Numer. Anal. Methods Geomech. (IF 3.4) Pub Date : 2024-04-29 Weiji Liu, Xin Zhou, Xiaohua Zhu
High‐voltage electric pulse drilling technology has the advantages of high rock‐breaking efficiency, and low rock‐breaking energy consumption, which is one of the most promising rock‐breaking methods in geothermal drilling. However, there is insufficient understanding of the mechanism of high‐voltage electric pulse breaking of HDR under high‐temperature and high‐pressure environments (HTHP). In this
-
m‐AGC tangent visco‐plastic operator with hardening/softening, and application to the visco‐plastic relaxation analysis of stable and unstable problems using fracture‐based geomechanical interfaces Int. J. Numer. Anal. Methods Geomech. (IF 3.4) Pub Date : 2024-04-27 Irene Jaqués, Ignacio Carol
A previous perfect visco‐plastic constitutive formulation of the Perzyna type incorporating the concepts of prescribed stress increments and m‐AGC tangent operator (m‐Assumed algorithmic generalized compliance tangent operator) is extended to the case of Hardening/Softening (H/S). This extension is possible thanks to the closed‐form solution developed for the evolution of the loading function during
-
A fractional Darcian model‐based analytical solution for non‐Darcian flow toward a fully penetrating well in a confined aquifer Int. J. Numer. Anal. Methods Geomech. (IF 3.4) Pub Date : 2024-04-25 Kun Tu, Qiang Wu, Hongwei Zhang, Xiang Li
The Forchheimer and Izbash equations have been long employed to investigate the behavior of non‐Darcian flow toward a well in various aquifer systems, but both two equations inevitably introduce problems such as more or less empirical nature, and dimensional unbalance. Therefore, this work makes the attempt to introduce the fractional Darcian model for characterizing the non‐Darcian behavior flow toward
-
Performance analysis of multilayered transversely isotropic saturated media under temperature and horizontally circular loads Int. J. Numer. Anal. Methods Geomech. (IF 3.4) Pub Date : 2024-04-24 Wei Yong Feng, Zhi Yong Ai
This study constructs a multilayered transversely isotropic saturated model under thermal and horizontally circular loads, and further investigates the model's thermo‐hydro‐mechanical coupling response. Firstly, the ordinary differential matrix equations of thermoelastic saturated media in the integral transformed domain are derived. Secondly, the solution for multilayered thermoelastic saturated media
-
Transversely isotropic effects on the coupled thermo‐hydro‐mechanical performance for layered saturated media Int. J. Numer. Anal. Methods Geomech. (IF 3.4) Pub Date : 2024-04-24 Yong Zhi Zhao, Zhenming Shi, Zhi Yong Ai
In this manuscript, a novel transformed differential quadrature solution to the coupled thermo‐hydro‐mechanical (THM) problem of layered transversely isotropic (TI) saturated media is proposed, accompanied by a sensitivity analysis of pertinent parameters. Initially, the THM governing equations that encompass the transverse isotropy characteristics of thermal, permeable, and mechanical properties are
-
Numerical investigation on the influence of secondary flaw lengths on the mechanical characteristics and cracking behaviour of red sandstone containing orthogonal cross flaws Int. J. Numer. Anal. Methods Geomech. (IF 3.4) Pub Date : 2024-04-24 Rongchao Xu, Baoyang Dou, Ying Zhao, Wenbin Peng, Zhen Li
Flaw length has a significant effect on the cracking behaviour of fractured rock. PFC2D was used to simulate the uniaxial compression of red sandstone samples with secondary flaw lengths L2 of 0 mm, 5 mm, 10 mm, 15 and 20 mm under different primary flaw angles α(α = 0°, 15°, 30°, 45°, 60°, 75°, and 90°). Based on the simulation results, the effects of the secondary flaw length on the mechanical parameters
-
Semi‐implicit material point method for simulating infiltration‐induced failure of unsaturated soil structures Int. J. Numer. Anal. Methods Geomech. (IF 3.4) Pub Date : 2024-04-24 Soma Hidano, Yuya Yamaguchi, Shinsuke Takase, Shuji Moriguchi, Kenji Kaneko, Kenjiro Terada
This study presents a semi‐implicit MPM to adequately characterize the mechanical behavior of unsaturated soil based on Biot's mixture theory. To represent the dependency of the degree of saturation on the suction, we employ the VG model along with a soil‐water characteristic curve, which determines a functional form of permeability called the Mualem model. Hencky's hyperelastic model and the Drucker‐Prager
-
Analysis of laterally loaded floating piles using a refined Tajimi model Int. J. Numer. Anal. Methods Geomech. (IF 3.4) Pub Date : 2024-04-24 Changjie Zheng, George Kouretzis, Xuanming Ding
This paper presents a novel mathematical model for the analysis of laterally loaded floating piles embedded in a homogeneous soil layer of finite thickness. The governing equations of the soil surrounding the pile are established by treating soil as a Tajimi‐type continuum, and their solution yields a closed‐form expression that provides the lateral force developing to resist pile deflection. Accordingly
-
A coupled finite difference‐spectral boundary integral method with applications to fluid diffusion in fault structures Int. J. Numer. Anal. Methods Geomech. (IF 3.4) Pub Date : 2024-04-24 Yuhan Wang, Elías Rafn Heimisson
Fluid migration in geological materials, a subject of great interest in various geophysical applications, has been interpreted through multiple numerical methods. Taking advantage of both a volume‐based method and a boundary integral method, we innovate a hybrid spectral‐boundary‐integral and finite‐difference method (SBI‐FDM) to describe the fluid injection and propagation in the fault structure.
-
Numerical modelling of thermal jet assisted rock cutting with double PDC cutters Int. J. Numer. Anal. Methods Geomech. (IF 3.4) Pub Date : 2024-04-24 Timo Saksala
Preconditioning of rock for drilling operations is a potential method to facilitate the mechanical breakage and mitigate the tool wear. This paper numerically investigates one such preconditioning technique, namely, the thermal jet assisted rock cutting. For this end, a numerical method for solving the governing thermo‐mechanical problem is developed and validated. The continuum approach is chosen
-
A general analytical solution for axisymmetric electro‐osmotic consolidation of unsaturated soil with semi‐permeable boundary Int. J. Numer. Anal. Methods Geomech. (IF 3.4) Pub Date : 2024-04-18 Xudong Zhao, Junjun Ni, Yang Liu, Wenhui Gong
This study proposes a closed‐form solution for axisymmetric electro‐osmotic consolidation of unsaturated soil under semi‐permeable boundary conditions. The governing equations are formulated to allow for vertical and radial flows of liquid and air phases. The techniques of eigenfunction expansion and Laplace transformation are employed to develop the exact solution for excess pore‐air (EPAP) and pore‐water
-
-
An integrated EOS, pore‐crush, strength and damage model framework for near‐field ground‐shock Int. J. Numer. Anal. Methods Geomech. (IF 3.4) Pub Date : 2024-04-15 Kane C. Bennett, Alyson M. Stahl, Thomas R. Canfield, Garrett G. Euler
An integrated Equation of State (EOS) and strength/pore‐crush/damage model framework is provided for modeling near to source (near‐field) ground‐shock response, where large deformations and pressures necessitate coupling EOS with pressure‐dependent plastic yield and damage. Nonlinear pressure‐dependence of strength up to high‐pressures is combined with a Modified Cam‐Clay‐like cap‐plasticity model
-
Probabilistic assessment of existing shield tunnel longitudinal responses to tunnelling Int. J. Numer. Anal. Methods Geomech. (IF 3.4) Pub Date : 2024-04-12 Rongzhu Liang, Zhiwei Zhang, Jin Wu, Zhongchao Li, Shian Cao, Wenbing Wu
This paper proposes a probabilistic‐based framework to assess the failure probability of the existing shield tunnel owing to undercrossing tunnelling. A novel deterministic model using the two‐phase analysis method is presented to evaluate the longitudinal behaviours of the in‐service shield tunnel. First, the tunnelling‐induced settlement is estimated using the Loganathan and Poulos’ method; second
-
Large‐strain consolidation of vacuum preloading combined with partially penetrating prefabricated vertical drains Int. J. Numer. Anal. Methods Geomech. (IF 3.4) Pub Date : 2024-04-12 Wei Guo, You Zhou, Liqiang Sun, Huihuang Jiang, Ruiqing Lang, Hao Chen, Yuxiao Ren
A system of vacuum preloading combined with partially penetrating prefabricated vertical drains (PP‐PVDs) is an effective solution for promoting the consolidation of the dredged marine clay. However, a significant and traditionally challenging‐to‐predict amount of deformation or settlement occurs. Therefore, it is necessary to introduce a three‐dimensional large‐strain consolidation model to consider
-
A bi‐fidelity inverse analysis method for deep excavations considering three‐dimensional effects Int. J. Numer. Anal. Methods Geomech. (IF 3.4) Pub Date : 2024-04-12 Yuanqin Tao, Sunjuexu Pan, Honglei Sun, Yuanqiang Cai, Ge Zhang, Miaojun Sun
Inverse analysis methods are commonly used in braced excavations for improved deformation predictions. This paper proposes a bi‐fidelity ensemble randomized maximum likelihood (BF‐EnRML) method for efficient inverse analyses of deep excavations considering the three‐dimensional effects. The bi‐fidelity (BF) model is developed by the low‐fidelity model (i.e., two‐dimensional finite element model, 2D
-
A novel stability equation for the estimation of the factor of safety for homogeneous dry finite slopes Int. J. Numer. Anal. Methods Geomech. (IF 3.4) Pub Date : 2024-04-11 Naloan Coutinho Sampa, Joshua Schorr
This paper introduces a novel closed‐form equation (surrogate model) for approximating the Morgenstern–Price estimate of the factor of safety of homogeneous dry finite slopes with circular failure surfaces. Unlike typically used methods, the proposed equation does not require the definition of a critical failure surface, splitting the soil mass into slices, or the iterative reduction of soil resistance
-
Study on the formation mechanism and preventive measure of pot cover effect for subgrade in seasonal frozen soil area under freeze–thaw cycles Int. J. Numer. Anal. Methods Geomech. (IF 3.4) Pub Date : 2024-04-10 Ruiling Zhang, Yaling Chou, Mingli Zhang, Hongbo Liu
The presence of an impervious cover layer inhibits the free evaporation of moisture in the soil during seasonal freeze–thaw cycles, leading to a phenomenon known as the pot cover effect. This can result in severe frost heave issues in airport runways, highway subgrades, railway subgrades, and other similar infrastructure. In this study, a disease investigation was conducted at a gas transmission station
-
Variability and loss of uniqueness of numerical solutions in FEM×DEM modeling with second gradient enhancement Int. J. Numer. Anal. Methods Geomech. (IF 3.4) Pub Date : 2024-04-10 Trung‐Kien Nguyen, Thanh‐Trung Vo, Nhu H. T. Nguyen, Gaël Combe
In the last decade, a new multi‐scale FEM×DEM approach has been developed using Finite Element Method (FEM) coupled with Discrete Element Method (DEM) as a constitutive law to account for the specificities of the mechanical behavior of granular materials. In FEM×DEM model, a DEM calculation is performed on a particle assembly (volume element—VE) at each Gauss point. Recent publications have demonstrated
-
-
Numerical modelling of diaphragm wall construction Int. J. Numer. Anal. Methods Geomech. (IF 3.4) Pub Date : 2024-04-08 Maria Kmeid, Géraldine Casaux‐Ginestet, Gilles Escadeillas, Julie Armengaud
Diaphragm walls are rectangular shaped cast in place deep foundations. There are two critical phenomena occurring, according to which the final quality can be affected: bentonite suspension exfiltration and concrete placement. Some imperfections seem to appear recurrently on the surface of the final wall. The defects are known as shadowing pathologies. The main reasons can be attributed to the dual
-
Mapped material point method for large deformation problems with sharp gradients and its application to soil‐structure interactions Int. J. Numer. Anal. Methods Geomech. (IF 3.4) Pub Date : 2024-04-08 Yidong Zhao, Minchen Li, Chenfanfu Jiang, Jinhyun Choo
The material point method (MPM) is often applied to large deformation problems that involve sharp gradients in the solution field. Representative examples in geomechanics are interactions between soils and various “structures” such as foundations, penetrometers, and machines, where the displacement fields exhibit sharp gradients around the soil‐structure interfaces. Such sharp gradients should be captured
-
Three‐dimensional stability analysis for a deep‐buried tunnel roof considering soil stratum strength nonlinearity Int. J. Numer. Anal. Methods Geomech. (IF 3.4) Pub Date : 2024-04-05 Jingshu Xu, Xinrui Wang, Ruotong Wang, Xiuli Du
A three‐dimensional (3D) collapse mechanism was employed in this work to investigate the roof stability of deep‐buried cylindrical tunnels in soil considering strength nonlinearity. Based on the kinematic approach of limit analysis, three tunnel roof stability measures, namely, the stability number, the required support pressure, and the factor of safety solutions were derived to provide quantitative
-
Research on calculation model for ultimate bearing capacity of tensile type anchor cables and the shape of internal fracture surface in anchorage segment Int. J. Numer. Anal. Methods Geomech. (IF 3.4) Pub Date : 2024-04-04 Qingyang Ren, Xin Meng, Bin Chen, Songqiang Xiao, Honghua Jin, Shan Mou, Zhongyao Li
The generalized model and parameter equation for the internal fracture surface of tensile type anchor cable anchorage section are constructed, and the calculation model of ultimate bearing capacity is derived based on the principle of limit equilibrium. The shape of the internal fracture surface in the anchorage section and the expression of its parameter equation are experimentally studied, and the
-
An activation mechanism for cyclic degradation of clays in bounding surface plasticity Int. J. Numer. Anal. Methods Geomech. (IF 3.4) Pub Date : 2024-04-04 Francesca Palmieri, Mahdi Taiebat
During undrained cyclic loading, clayey soils experience substantial stiffness and strength degradation when subjected to shear amplitudes exceeding a critical threshold. This paper presents an enhanced bounding surface rate‐independent plasticity model, an evolution of the previous SANICLAY model, tailored to capture this specific behavior during cyclic loading. A distinguishing feature of the proposed
-
Stochastic assessment of 3‐D tunnels in near‐fault ground motion using modified domain reduction method Int. J. Numer. Anal. Methods Geomech. (IF 3.4) Pub Date : 2024-04-01 Bhavesh Banjare, Gauri Ranjan Krishna Chand Avatar
A robust assessment of tunnels due to uncertainties present in soil and ground motion properties can affect the dynamic response of these structures. In this paper, a stochastic analysis considering an aleatory variability in shear velocity Vs by performing Monte Carlo simulations and assessing its influence on underground tunnels. To numerically assess the response of the soil‐tunnel system to near‐fault
-
Geotechnical analysis involving strain localization of overconsolidated soils based on unified hardening model with hardening variable updated by a composite scheme Int. J. Numer. Anal. Methods Geomech. (IF 3.4) Pub Date : 2024-04-01 Jianbin Tang, Xi Chen, Liusheng Cui, Zhe Xu, Guoqiang Liu
Strain localization simulation of overconsolidated soils with high overconsolidation ratio (OCR) has been a long‐standing challenge. Some critical state soil models, including the modified Cam‐clay (MCC) model, have been widely applied, but they may not predict the shear dilatancy of overconsolidated soils well in some cases. Hence, the unified hardening (UH) model, which may be viewed as a generalized