International Journal for Numerical and Analytical Methods in Geomechanics最新文献_第2页

Effect of the Variation of Compressibility and Permeability Characteristics of Clogged Stone Column on Drainage Performance of Column During Liquefaction 液化过程中堵塞石柱压缩性和渗透性变化对石柱排水性能的影响

IF 4 2区工程技术

International Journal for Numerical and Analytical Methods in Geomechanics Pub Date : 2025-06-14 DOI: 10.1002/nag.70001

Suravi Pal

{"title":"Effect of the Variation of Compressibility and Permeability Characteristics of Clogged Stone Column on Drainage Performance of Column During Liquefaction","authors":"Suravi Pal","doi":"10.1002/nag.70001","DOIUrl":"https://doi.org/10.1002/nag.70001","url":null,"abstract":"Installation of a stone column (SC) is an effective way to promote radial drainage and reduce the risk of liquefaction. However, the clogging effects caused during the service life of SC result in degradation of the performance of SC. Clogging of SC develops when the water flow force fines to release from soil and migrate with it. These fines may become trapped in the pores of gravel and cause the clogging of SC. The fines accumulation within SC over time not only decrease the permeability of SC, but also increases the compressibility of SC due to the reduction of inter‐particle contact between gravels. The present paper demonstrates a mathematical model to determine the pore pressure of SC‐improved soil during liquefaction by considering the change in permeability and compressibility of clogged SC. The model is validated with the available experimental data. Detail parametric studies are conducted to enhance the understanding of various parameters of soil and SC on the effectiveness of SC due to change in permeability and compressibility of the clogged SC. The results obtained from the present model shows that in the case of multiple earthquakes, for the second earthquake, the pore pressure ratio of SC‐improved ground may increase by more than 36% due to consideration of the compressibility effect of clogged SC.","PeriodicalId":13786,"journal":{"name":"International Journal for Numerical and Analytical Methods in Geomechanics","volume":"91 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144289780","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Seismic Displacement Analysis of Jointed Rock Slopes Considering Topographic Amplification and Joint Strength Degradation 考虑地形放大和节理强度退化的节理岩质边坡地震位移分析

IF 4 2区工程技术

International Journal for Numerical and Analytical Methods in Geomechanics Pub Date : 2025-06-13 DOI: 10.1002/nag.4017

Hui Shen, Xinping Li, Tingting Liu, Yaqun Liu, Haibo Li, Wenxu Huang

{"title":"Seismic Displacement Analysis of Jointed Rock Slopes Considering Topographic Amplification and Joint Strength Degradation","authors":"Hui Shen, Xinping Li, Tingting Liu, Yaqun Liu, Haibo Li, Wenxu Huang","doi":"10.1002/nag.4017","DOIUrl":"https://doi.org/10.1002/nag.4017","url":null,"abstract":"Accurately estimating seismically induced permanent displacement is essential for evaluating the dynamic stability of rock slopes. This study presents an enhanced model aimed at better evaluating the seismic displacement of jointed rock slopes by incorporating topographic amplification effects and the dynamic strength degradation of joints. A pseudodynamic analysis was utilized to model the amplified seismic force acting on the slope. The dynamic degradation law of the joint strength was characterized through the cyclic shear tests and integrated into the proposed model. Seismic displacement for the jointed slopes was obtained by solving the equations of motion, with sliding governed by the Mohr–Coulomb joint strength criterion. The performance of the prediction model was evaluated by comparing its results with those derived from the Newmark method and existing methods. Subsequently, the impact of amplified ground motions and joint strength degradation dependent on displacement and velocity on seismic displacement of jointed rock slopes was examined numerically. The results indicate that the proposed model can directly estimate reasonable seismic displacements of jointed slopes without explicitly specifying the yield acceleration, and it produces more conservative displacements compared to the Newmark method. Findings also emphasize that the amplified ground motion and the dynamic shear strength of joints significantly increase the seismic displacements, implying that neglecting them may lead to an underestimation of the permanent displacement of slopes. This study offers an alternative approach for estimating the permanent displacement of jointed rock slopes, which may provide valuable insights for the seismic design of slope engineering.","PeriodicalId":13786,"journal":{"name":"International Journal for Numerical and Analytical Methods in Geomechanics","volume":"10 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144288201","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Vacuum Filtration Theory for Slurry Considering Bidirectional Deformation Based on Elliptical Cylinder Model 基于椭圆圆柱模型的考虑双向变形的料浆真空过滤理论

IF 4 2区工程技术

International Journal for Numerical and Analytical Methods in Geomechanics Pub Date : 2025-06-12 DOI: 10.1002/nag.4015

Jiahao Wang, Li Shi, Hongxu Jin, Bo Chen, Zhen Huang

{"title":"Vacuum Filtration Theory for Slurry Considering Bidirectional Deformation Based on Elliptical Cylinder Model","authors":"Jiahao Wang, Li Shi, Hongxu Jin, Bo Chen, Zhen Huang","doi":"10.1002/nag.4015","DOIUrl":"https://doi.org/10.1002/nag.4015","url":null,"abstract":"Vacuum preloading combined with prefabricated vertical drains is commonly used for enhancing the high water content slurry. However, the process of slurry dewatering, which is inherently a filtration problem, is difficult to describe using consolidation theories. This study presents a new vacuum filtration theory for slurry based on the elliptical cylinder model, where the radial and vertical deformations are governed by the equal settlement assumption. To describe the permeability and compressibility of slurry, the extended power function equations are adopted. The governing equations associated with the influenced zone and the moving boundary are essential components of the vacuum filtration theory, which are solved by the finite difference method. The applicability of the theory is confirmed by comparing the results of it with the laboratory tests and the radial filtration theory. Depending on the properties of the slurry used in the laboratory tests, the filtration behaviour are analysed. Finally, parametric analysis is carried out to investigate the effect of vacuum pressure on the filtration behaviour of the slurry.","PeriodicalId":13786,"journal":{"name":"International Journal for Numerical and Analytical Methods in Geomechanics","volume":"51 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144278233","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Semi‐Analytical Solution for Consolidation of Unsaturated Soil Composite Foundation Improved by Local Permeable Pile With Finite Hankel Transform 有限汉克尔变换局部透水桩加固非饱和土复合地基半解析解

IF 4 2区工程技术

International Journal for Numerical and Analytical Methods in Geomechanics Pub Date : 2025-06-12 DOI: 10.1002/nag.70000

Hongping Meng, Lianghua Jiang, Aifang Qin, Yuxiang Peng

{"title":"Semi‐Analytical Solution for Consolidation of Unsaturated Soil Composite Foundation Improved by Local Permeable Pile With Finite Hankel Transform","authors":"Hongping Meng, Lianghua Jiang, Aifang Qin, Yuxiang Peng","doi":"10.1002/nag.70000","DOIUrl":"https://doi.org/10.1002/nag.70000","url":null,"abstract":"The application of semi‐permeable columns, such as the pipe pile with holes, provides new insights for the selection of pile types in composite foundations. In this study, the axisymmetric consolidation model of unsaturated soil composite foundation (USCF) with local permeable pile by introducing the column‐soil interface parameters is established under the free‐strain assumption. By applying Laplace transforms, finite Hankel transforms, and their inverse transforms, a semi‐analytical solution is obtained, accounting for both radial and vertical flow. The effectiveness of the presented solution is verified by comparing it with governing equations and semi‐analytical solutions from existing literature. Furthermore, the consolidation behaviors of USCF with semi‐permeable columns are studied under various influencing factors. The results indicate that an increase in the column‐soil interface parameter and area replacement ratio accelerated the dissipation of excess pore pressures, thus shortening the time required for its complete dissipation. It is noteworthy that when the column‐soil interface parameter exceeds 10, its effect on the acceleration of excess pore pressure dissipation becomes negligible.","PeriodicalId":13786,"journal":{"name":"International Journal for Numerical and Analytical Methods in Geomechanics","volume":"37 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144278235","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Slope Stability Analysis: Implementing Discrete Failure Mechanisms and Horizontal Slice Limit Equilibrium Method 边坡稳定性分析：采用离散破坏机制和水平片极限平衡法

IF 4 2区工程技术

International Journal for Numerical and Analytical Methods in Geomechanics Pub Date : 2025-06-11 DOI: 10.1002/nag.4020

Peng Xu, Guoguo Liu, Ziquan Chen, Shaohong Li

{"title":"Slope Stability Analysis: Implementing Discrete Failure Mechanisms and Horizontal Slice Limit Equilibrium Method","authors":"Peng Xu, Guoguo Liu, Ziquan Chen, Shaohong Li","doi":"10.1002/nag.4020","DOIUrl":"https://doi.org/10.1002/nag.4020","url":null,"abstract":"The safety factor of a slope is one of the most important indicators for evaluating slope stability. To more reasonably calculate the safety factor of slopes, this paper presents a new method combining discrete failure mechanisms and a horizontal slice method. This approach generates potential sliding surfaces using discrete techniques, calculates the safety factor of specific sliding surfaces via the horizontal slice method, and then transforms the slope stability analysis into a three‐parameter optimization problem, which is solved quickly using a global optimization algorithm (gray wolf optimizer). Cases under static and dynamic conditions show that the safety factor calculated by this method has a relative error of less than 2% compared to those calculated by the strength reduction method and the Morgenstern–Price method, with the critical sliding surfaces also aligning well. In complex real‐world slope scenarios, the critical slip surface identified using the proposed method more closely aligns with that obtained via the strength reduction approach than with the Morgenstern–Price method. Parametric analysis indicates that increasing the soil unit weight leads to a slight decrease in the maximum depth of the slip surface. The maximum depth is more sensitive to the horizontal seismic coefficient than to soil strength parameters; as the seismic coefficient increases, the slip surface deepens markedly. The proposed method is readily extendable to quasi‐dynamic analytical models, allowing for more accurate assessment of seismic effects and demonstrating considerable scalability. Compared to the existing slice method, the proposed method not only ensures simplicity but also reasonably accounts for the heterogeneity of the geotechnical parameters of the slope, making it a potentially valuable tool for analyzing slope stability.","PeriodicalId":13786,"journal":{"name":"International Journal for Numerical and Analytical Methods in Geomechanics","volume":"9 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144268606","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

ANN‐Based Green's Function Approach for Reservoir Geomechanics 基于神经网络的储层地质力学格林函数方法

IF 4 2区工程技术

International Journal for Numerical and Analytical Methods in Geomechanics Pub Date : 2025-06-05 DOI: 10.1002/nag.4012

Matheus L. Peres, Elisa D. Sotelino, Leonardo C. Mesquita

{"title":"ANN‐Based Green's Function Approach for Reservoir Geomechanics","authors":"Matheus L. Peres, Elisa D. Sotelino, Leonardo C. Mesquita","doi":"10.1002/nag.4012","DOIUrl":"https://doi.org/10.1002/nag.4012","url":null,"abstract":"Green's functions have been a tool to analyze important reservoir geomechanics effects like subsidence, compaction, well closure, and permeability variation. However, the classical Green's function is related to linear elastic, homogenous, and geometrically simplified media. The use of auxiliary functions that consider heterogeneous media has the potential to simplify the numerical analyses of some complex problems. This research work proposes a new approach to Green's function method based on artificial neural networks (ANNs) to consider stratified media with direct application in reservoir geomechanics. These solutions obtained through ANN have as output the normalized displacement at any point of the stratified massif due to the application of a point load inside the massif. The input data of the proposed ANN are the material properties of the media, the point load, and the point of interest. By using the developed ANN‐based Green's function together with the classical Green's function approach, it is possible to obtain individually the displacement at any point of the massif due to a pore pressure variation within the reservoir, only discretizing the reservoir boundary. This leads to a more efficient method when compared to traditional methods, such as the finite element method. For the points of interest, seafloor, and top and bottom of the reservoir, the numerical example presented was 25 times faster than the classic Green function approach on a computer with 12 threads of 2.6 GHz and 32 GB RAM. This reduction in processing time is crucial for decision‐makers to act in field applications.","PeriodicalId":13786,"journal":{"name":"International Journal for Numerical and Analytical Methods in Geomechanics","volume":"10 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144228471","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Interaction Between Layered Saturated Soft Rock–Soil Mass and Pile Groups Considering Free‐Standing Length and Rock‐Socketed Depth 考虑独立桩长和嵌岩深度的层状饱和软岩土体与群桩的相互作用

IF 4 2区工程技术

International Journal for Numerical and Analytical Methods in Geomechanics Pub Date : 2025-06-02 DOI: 10.1002/nag.4014

Yuan Feng Chen, Zhi Yong Ai, Zhan Guo Ma, Zi Kun Ye

{"title":"Interaction Between Layered Saturated Soft Rock–Soil Mass and Pile Groups Considering Free‐Standing Length and Rock‐Socketed Depth","authors":"Yuan Feng Chen, Zhi Yong Ai, Zhan Guo Ma, Zi Kun Ye","doi":"10.1002/nag.4014","DOIUrl":"https://doi.org/10.1002/nag.4014","url":null,"abstract":"This paper investigates the interaction between layered saturated soft rock–soil mass and pile groups considering free‐standing length and rock‐socketed depth. The modeling of the identical pile is on the basis of one‐dimensional compression bar with a three‐node bar element. The global force balance equation for the pile group is then derived using the finite element method (FEM). Taking the existence of free‐standing length of the single pile into account, the rock–soil mass stiffness matrix equation for a rock‐socketed single pile is expanded, and the global rock–soil mass stiffness matrix equation for the pile group is further derived on the basis of the boundary element method (BEM). Referring to the coupled FEM‐BEM, the solution for the free‐standing rock‐socketed pile group is further achieved by combining the conditions of force equilibrium and displacement coordination for the rigid cap. The correctness of the theory and method in this study is confirmed by validating with the existing solutions and ABAQUS. Further analyses are given to investigate the impact of key factors on the response of a free‐standing rock‐socketed pile group in the layered saturated soft rock–soil mass.","PeriodicalId":13786,"journal":{"name":"International Journal for Numerical and Analytical Methods in Geomechanics","volume":"41 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144201506","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical Investigation of Mechanical Response of Sand‐Rubber Mixture by Material Point Method 砂-橡胶混合料力学响应的物质点法数值研究

IF 4 2区工程技术

International Journal for Numerical and Analytical Methods in Geomechanics Pub Date : 2025-05-31 DOI: 10.1002/nag.4011

Qibo Shi, Weijian Liang, Yin‐Fu Jin, Zhen‐Yu Yin, Xiangsheng Chen

{"title":"Numerical Investigation of Mechanical Response of Sand‐Rubber Mixture by Material Point Method","authors":"Qibo Shi, Weijian Liang, Yin‐Fu Jin, Zhen‐Yu Yin, Xiangsheng Chen","doi":"10.1002/nag.4011","DOIUrl":"https://doi.org/10.1002/nag.4011","url":null,"abstract":"Sand‐rubber mixture (SRM), a composite material made of recycled rubber and sand, is gaining increasing attention in construction engineering due to its lightweight nature, cost‐effectiveness, ease of processing, and other advantages. However, the mechanical behavior of SRM remains a complex issue as the addition of rubber not only increases the types of contacts between grains, but also changes the contact topology with rubber undergoing significant deformation. This study presents a numerical investigation of the intricate mechanical behavior of SRM based on the material point method (MPM) tailored for modeling the assembly of deformable grains. The employed approach introduces multiple meshes for handling the kinetic and deformation of individual grains and a discrete element method (DEM)‐type contact algorithm to directly address the intricate interaction in SRM, being capable of accurately modeling the complex behavior of SRM. Furthermore, rubber membranes in the biaxial shear test are simulated with material points with sufficient deformation capacity to accurately simulate the actual loading boundary. We first validated the accuracy and effectiveness of the proposed method through a series of benchmarks. Subsequently, one‐dimensional compression and biaxial shear simulations were conducted on the SRM to investigate the influence of rubber content (RC) and confining pressures. Both macroscopic deformation and the microstructural characteristics are examined. The results indicate that increasing RC leads to a more uniform contact force distribution, and a more stable force chain network, while higher confining pressure enhances the particle connectivity within the SRM.","PeriodicalId":13786,"journal":{"name":"International Journal for Numerical and Analytical Methods in Geomechanics","volume":"44 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144188859","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Exploring the Elastic Properties of Interfacial Transition Zone in Concrete Materials Using an Ensemble Learning Approach 用集成学习方法探索混凝土材料界面过渡区的弹性特性

IF 4 2区工程技术

International Journal for Numerical and Analytical Methods in Geomechanics Pub Date : 2025-05-30 DOI: 10.1002/nag.4009

Jing Xue, Yajun Cao, Xiaolong Zhao, Jianfu Shao

引用次数: 0

Compacting Effect Study on the Treatment of Collapsible Loess Foundation by the SDDC Method: Numerical and Experimental Analysis SDDC法处理湿陷性黄土地基的压实效果研究：数值与试验分析

IF 4 2区工程技术

International Journal for Numerical and Analytical Methods in Geomechanics Pub Date : 2025-05-27 DOI: 10.1002/nag.4002

Caihui Zhu, Sen Peng, Xiaosong Zhou, Xiulai Zhu, Jianwei Qiao, Lei Yan, Xinlei Li, Wei Shi

{"title":"Compacting Effect Study on the Treatment of Collapsible Loess Foundation by the SDDC Method: Numerical and Experimental Analysis","authors":"Caihui Zhu, Sen Peng, Xiaosong Zhou, Xiulai Zhu, Jianwei Qiao, Lei Yan, Xinlei Li, Wei Shi","doi":"10.1002/nag.4002","DOIUrl":"https://doi.org/10.1002/nag.4002","url":null,"abstract":"An optimal design scheme is developed for treating collapsible loess foundation by the super down‐hole dynamic compaction method (SDDC) in terms of the loess foundation treatment project. This method involves the application of high‐energy impacts to the soil to achieve a compacting effect (CE), which is defined as the measurable improvement in soil density and reduction in its collapsibility. The compaction effect of loess particles and different SDDC parameters on collapsible loess foundation is simulated by the discrete element method (DEM) based on particle flow PFC software, and the optimization scheme is verified by field test data. The results indicates that the SDDC method is more effective for the foundation with uniform soil particle distribution with fine particle size, while the influence of initial porosity, shear modulus, and Poisson's ratio of soil on foundation CE is not significant. For a single pile, the CE of the foundation can be improved by increasing the compaction energy and the diameter of the hammer head, increasing the compaction energy, and reducing the diameter of the drill hole and the distance between piles. The CE performance of an olivary hammer is better than a pointed hammer. Finally, the design parameters of the SDDC construction method in this site are determined as follows: The down‐hole diameter D0 = 1.2 m, pile spacing L = 2.8–3.2 m, and olivary hammer construction was adopted.","PeriodicalId":13786,"journal":{"name":"International Journal for Numerical and Analytical Methods in Geomechanics","volume":"10 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144153378","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0