Computers and Geotechnics最新文献_第8页

Mechanical behaviour of EICP-treated calcareous sands: experimental study and constitutive modelling eicp处理钙质砂的力学行为：实验研究和本构模型

IF 5.3 1区工程技术

Computers and Geotechnics Pub Date : 2025-04-29 DOI: 10.1016/j.compgeo.2025.107308

Qian Zhang , Weimin Ye , Qiong Wang , Yonggui Chen

{"title":"Mechanical behaviour of EICP-treated calcareous sands: experimental study and constitutive modelling","authors":"Qian Zhang , Weimin Ye , Qiong Wang , Yonggui Chen","doi":"10.1016/j.compgeo.2025.107308","DOIUrl":"10.1016/j.compgeo.2025.107308","url":null,"abstract":"<div><div>Enzyme induced carbonate precipitation (EICP) is an effective and promising biocementation technique for soil reinforcement. Calcareous sands exhibit special physical characteristics, including complex particle shapes, angularity, and abundant inner pores, due to their unique biogenesis. The mechanical behaviour of EICP-treated calcareous sands could be influenced by both the cementation level and particle breakage. In this study, triaxial and one-dimensional compression tests were conducted on untreated and EICP-treated calcareous sands with varying cementation levels. Results show that the strength and dilatancy were significantly improved by increasing the carbonate content, resulting in more obvious brittleness in the EICP-treated calcareous sands. Both the bond strength and the yield stress followed exponential relationships with the carbonate content. By introducing bond strength and particle breakage yield stress, a constitutive model was developed within the framework of super-subloading concept. Relationships between the state variables and carbonate content were quantitatively addressed. The simulation results agreed well with the experimental measurements, demonstrating the effectiveness and capability of the proposed model to describe the mechanical features of the calcareous sands treated under various cementation and stress conditions.</div></div>","PeriodicalId":55217,"journal":{"name":"Computers and Geotechnics","volume":"184 ","pages":"Article 107308"},"PeriodicalIF":5.3,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143881489","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Development of a newly coupled DSPH-DDA technique for coupling problems in geotechnical hazards 岩土灾害耦合问题的新耦合DSPH-DDA技术的发展

IF 5.3 1区工程技术

Computers and Geotechnics Pub Date : 2025-04-29 DOI: 10.1016/j.compgeo.2025.107303

Xinyan Peng , Pengcheng Yu , Guangqi Chen , Zilong Song , Yingbin Zhang , Xiao Cheng , Changze Li

{"title":"Development of a newly coupled DSPH-DDA technique for coupling problems in geotechnical hazards","authors":"Xinyan Peng , Pengcheng Yu , Guangqi Chen , Zilong Song , Yingbin Zhang , Xiao Cheng , Changze Li","doi":"10.1016/j.compgeo.2025.107303","DOIUrl":"10.1016/j.compgeo.2025.107303","url":null,"abstract":"<div><div>Geotechnical hazards usually involve interactions between different materials or phases such as water-structure interaction, water–rock interaction, soil-structure interaction, or soil-rock interaction. Accurate and efficient simulation of such phenomenon can be challengeable due to the complex interactive mechanism and large deformation. A newly coupled DualSPHysics (an open-source Smoothed Particle Hydrodynamics solver platform) – Discontinuous Deformation Analysis (DSPH-DDA) technique is developed by combination of two- and three-dimensional DDA and DualSPHysics. DDA is executed in CPU with independent time step size, and a synchronizing technique is developed to maintain the pace between two systems. Besides, for describing soil behavior, an elastic–plastic soil constitutive model is also incorporated into DualSPHysics. The spring-dashpot contact model is adopted to idealize particle-block interactions. Five numerical examples are conducted to demonstrate the performance of the newly coupled DSPH-DDA technique, including the soil column collapse, the free surface flow impacting on an elastic structure, the dam break flow impacting on cubes, modular-block soil retaining wall collapse, and the tunnel face collapse with varied rock contents of soil-rock-mixture model ground. The simulation results are consistent with the experimental data. Conclusively, this newly coupled DSPH-DDA technique is applicable to describe large deformation and failure behavior of coupling problems in geotechnical hazards with high accuracy and calculation efficiency.</div></div>","PeriodicalId":55217,"journal":{"name":"Computers and Geotechnics","volume":"184 ","pages":"Article 107303"},"PeriodicalIF":5.3,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143886333","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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 analysis of lateral bearing capacity of monopiles in clay, part 1: single uniform and isotropic soil layer with strength profile su = su1 × z 粘土中单桩横向承载力数值分析，第1部分：强度剖面为su = su1 × z的单均匀各向同性土层

IF 5.3 1区工程技术

Computers and Geotechnics Pub Date : 2025-04-29 DOI: 10.1016/j.compgeo.2025.107294

Haoran OuYang , Zhiyu Gong , Mingxing Zhu , Hongbo Liu , Zhentao Liu , Guoliang Dai , Weiming Gong

{"title":"Numerical analysis of lateral bearing capacity of monopiles in clay, part 1: single uniform and isotropic soil layer with strength profile su = su1 × z","authors":"Haoran OuYang , Zhiyu Gong , Mingxing Zhu , Hongbo Liu , Zhentao Liu , Guoliang Dai , Weiming Gong","doi":"10.1016/j.compgeo.2025.107294","DOIUrl":"10.1016/j.compgeo.2025.107294","url":null,"abstract":"<div><div>Global energy consumption is becoming a serious issue, and improving the energy structure and transition to renewable energy has become a worldwide priority. Large-diameter monopile foundations are commonly used for offshore wind turbine foundations, and their design usually adopts the <em>p–y</em> curve method. However, a simple and practical design method is still lacking. Therefore, this paper details a numerical investigation of the monotonic lateral behavior of large-diameter monopiles in uniform clay with linear strength growth based on the NGI-ADP constitutive model, considering a wide range of pile geometric dimensions and soil properties. Based on the numerical results, equations to calculate the critical burial depth <em>L</em><sub>crit</sub> and critical ultimate bearing capacity <em>F</em><sub>u,</sub> a criterion for a monopile in clay with linearly increasing strength was established, and a calculation method for the load<em>–</em>deformation curve (at the mudline) of a large-diameter pile suitable for a wide range of pile geometric parameters and soil strength distributions was proposed. After the effectiveness of the proposed method is verified through measured test results, the influence mechanism of different pile or soil parameters on the lateral load characteristics of monopile foundations in clay is systematically analyzed via the proposed method.</div></div>","PeriodicalId":55217,"journal":{"name":"Computers and Geotechnics","volume":"184 ","pages":"Article 107294"},"PeriodicalIF":5.3,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143881490","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Nonlocal strain regularisation for models with multiple state variables using an example of UH model 多状态变量模型的非局部应变正则化，以UH模型为例

IF 5.3 1区工程技术

Computers and Geotechnics Pub Date : 2025-04-28 DOI: 10.1016/j.compgeo.2025.107296

Xiaotian Wu , Yangping Yao , Liang Dong , David M. Potts , Lidija Zdravkovic , Wenjie Cui

{"title":"Nonlocal strain regularisation for models with multiple state variables using an example of UH model","authors":"Xiaotian Wu , Yangping Yao , Liang Dong , David M. Potts , Lidija Zdravkovic , Wenjie Cui","doi":"10.1016/j.compgeo.2025.107296","DOIUrl":"10.1016/j.compgeo.2025.107296","url":null,"abstract":"<div><div>When the conventional finite element (FE) method is used in the simulation of strain-softening soils and the accompanying appearance of shear bands, the predicted results can exhibit a significant mesh dependency and may suffer from convergence difficulties. Nonlocal strain regularisation has been shown as one of the reliable approaches for overcoming such problems. This paper first demonstrates how a modified substepping stress point algorithm, that incorporates the nonlocal strain regularisation, can be developed for constitutive models which have multiple state variables in their hardening/softening rule. The algorithm is derived for the unified hardening (UH) model as an example of such models, which was developed to account for the constitutive characteristics of both clays and sands. The capability of the nonlocal UH model is then verified through analyses of boundary value problems involving dense sands, demonstrating a very good performance in eliminating the problem of mesh dependency while maintaining a stable solution process. Recommendations are also provided on how to determine the values of nonlocal parameters for the analysis of full-scale engineering problems using the proposed nonlocal algorithm.</div></div>","PeriodicalId":55217,"journal":{"name":"Computers and Geotechnics","volume":"184 ","pages":"Article 107296"},"PeriodicalIF":5.3,"publicationDate":"2025-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143878675","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Transient free surface flow through 3D fracture networks: PVI approach and geological-entropy-based exploration on spatial disorder 三维裂缝网络中的瞬态自由地表流动：PVI方法和基于地质熵的空间失序勘探

IF 5.3 1区工程技术

Computers and Geotechnics Pub Date : 2025-04-28 DOI: 10.1016/j.compgeo.2025.107300

Ce Li , Jianlong Sheng , Zuyang Ye , Chi Yao , Feng Xiong , Banza Mike Wa Mutombo

{"title":"Transient free surface flow through 3D fracture networks: PVI approach and geological-entropy-based exploration on spatial disorder","authors":"Ce Li , Jianlong Sheng , Zuyang Ye , Chi Yao , Feng Xiong , Banza Mike Wa Mutombo","doi":"10.1016/j.compgeo.2025.107300","DOIUrl":"10.1016/j.compgeo.2025.107300","url":null,"abstract":"<div><div>A numerical approach of the parabolic variational inequality (PVI) formulations is proposed for solving transient free surface flow within three-dimensional (3D) fracture networks, while geological entropy is employed to investigate the morphological diversity of free surfaces concerning spatial disorder. Specifically, the related partial differential equations (PDEs), as well as PVI formulations, are presented by rigorously proving the equivalence between the two. The validity of proposed PVI formulations is verified by analytical solution and experimental results, respectively. Subsequently, the methodology of geological entropy is applied to analyze the transient free surface flow in fracture systems with varying trace lengths and spacings. It is found that either narrower spacings or longer trace lengths would be slowing the elevation of free surfaces. Due to spatial disorder of the fracture distribution, transient free surfaces with varied morphology, such as <em>flat</em>, <em>tortuous</em>, and <em>zigzag</em>, are noticed, which can be synthetically explained by local entropy regarding its differential concentrations and clustering modes. The entrogram, associated with the spatial order, is valid for quantitatively describing the magnitude and stability of flow rates by relative entropy and entropy scale, respectively. The developed PVI approach is physically sound, whereby the geological-entropy-based exploration is expected to provide available insights for field evaluation.</div></div>","PeriodicalId":55217,"journal":{"name":"Computers and Geotechnics","volume":"184 ","pages":"Article 107300"},"PeriodicalIF":5.3,"publicationDate":"2025-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143881488","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Buckling characteristics of bucket foundations under suction installation in spatially variable clay 空间可变粘土中吸力作用下桶形基础屈曲特性

IF 5.3 1区工程技术

Computers and Geotechnics Pub Date : 2025-04-28 DOI: 10.1016/j.compgeo.2025.107297

Shuntao Fan , Lingyu Fan , Yue Yan , Dengfeng Fu , Sa Li

{"title":"Buckling characteristics of bucket foundations under suction installation in spatially variable clay","authors":"Shuntao Fan , Lingyu Fan , Yue Yan , Dengfeng Fu , Sa Li","doi":"10.1016/j.compgeo.2025.107297","DOIUrl":"10.1016/j.compgeo.2025.107297","url":null,"abstract":"<div><div>The suction bucket, also termed the suction caisson, is a cost-effective offshore foundation widely used in wind farms worldwide. However, there is a risk of buckling in thin-walled skirts during suction installation, with several incidents highlighting the need for improved buckling design. Previous studies focused on idealized boundaries and homogeneous soils, neglecting soil spatial variability. This study uses the random finite element method to investigate the buckling behaviour during installation in spatially variable soils while considering real geometric and eigenmode imperfections. The results show that soil variability reduces eigenvalues and alters eigenmode symmetry in linear buckling analysis. In nonlinear buckling, the failure mode is closely linked to the relative strength distribution of the soil, and the buckling pressure under real imperfections is significantly greater than that under modal imperfections. As the penetration depth and imperfection amplitude increase, the buckling transition from peak collapse to failure is controlled by the maximum allowable rotation. The design based on the first random eigenmode is more conservative than the deterministic approach is. Finally, safety factors corresponding to a 1% failure probability are provided, considering the penetration depth and fabrication tolerance class. This study offers valuable insights for the buckling design of suction caissons.</div></div>","PeriodicalId":55217,"journal":{"name":"Computers and Geotechnics","volume":"184 ","pages":"Article 107297"},"PeriodicalIF":5.3,"publicationDate":"2025-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143878674","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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 modelling of geological processes as means for the diagnosis of ancient landslide mechanisms 地质过程的数值模拟作为诊断古滑坡机制的手段

IF 5.3 1区工程技术

Computers and Geotechnics Pub Date : 2025-04-26 DOI: 10.1016/j.compgeo.2025.107238

Vito Tagarelli , Francesca Santaloia , Gaetano Elia , Federica Cotecchia

{"title":"Numerical modelling of geological processes as means for the diagnosis of ancient landslide mechanisms","authors":"Vito Tagarelli , Francesca Santaloia , Gaetano Elia , Federica Cotecchia","doi":"10.1016/j.compgeo.2025.107238","DOIUrl":"10.1016/j.compgeo.2025.107238","url":null,"abstract":"<div><div>The occurrence of deep paleo-landslides in marine clays is a well-documented phenomenon in multiple slopes within the south-eastern Italian Apennines and their associated foredeep basin. To accurately diagnose the mechanisms occurring in such landslides, a comprehensive numerical simulation of the processes leading to the initial slope failures is essential. This approach is only feasible when the geological history of the soil deposit has been meticulously evaluated.</div><div>This paper presents a methodological procedure adopted to assist in diagnosing the current activity of a slow-moving, deep-seated ancient landslide using hydro-mechanical modelling. To investigate the processes leading to the initial slope failures, elasto-plastic finite element simulations have been conducted. These simulations aim to replicate the geological processes that the slope has experienced, which are identified as the key contributors to the landslide’s inception. The application of this numerical modelling procedure has proven to be a valuable diagnostic tool, enhancing the understanding of the ancient landslide mechanism and providing insights into its current features, such as the position of the toe, landslide depth, and style of movement.</div></div>","PeriodicalId":55217,"journal":{"name":"Computers and Geotechnics","volume":"184 ","pages":"Article 107238"},"PeriodicalIF":5.3,"publicationDate":"2025-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143873358","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Effect of fabric anisotropy on mechanical behavior and undrained cyclic resistance of granular materials 织物各向异性对颗粒材料力学性能和不排水循环阻力的影响

IF 5.3 1区工程技术

Computers and Geotechnics Pub Date : 2025-04-25 DOI: 10.1016/j.compgeo.2025.107292

Xiao-Tian Yang, Yan-Guo Zhou, Qiang Ma, Yun-Min Chen

{"title":"Effect of fabric anisotropy on mechanical behavior and undrained cyclic resistance of granular materials","authors":"Xiao-Tian Yang, Yan-Guo Zhou, Qiang Ma, Yun-Min Chen","doi":"10.1016/j.compgeo.2025.107292","DOIUrl":"10.1016/j.compgeo.2025.107292","url":null,"abstract":"<div><div>The stress state and density of soil have been considered as the key factors to determine the liquefaction resistance. However, the results of seismic liquefaction case histories, laboratory tests and centrifuge model tests show that the fabric characteristics also influence liquefaction resistance, even more significantly than the contributions of stress state and density. In this study, anisotropic specimens with different consolidation histories were prepared using the 3D Discrete Element Method (DEM) to investigate the influence of fabric characteristics on the mechanical behavior of granular materials and the underlying mechanisms. The simulations revealed that under monotonic shear conditions, horizontally anisotropic specimens exhibited strain hardening and dilatancy characteristics, as well as higher peak strength. Under cyclic shear condition, the normalized liquefaction resistance of the specimens showed a strong linear relationship with the degree of anisotropy, independent of confining pressures and density. Microscopic results indicate that the fabric arrangement aligned with the loading direction leads to the evolution of the mechanical coordination number and average contact force in a manner favorable to resisting loads, which is the underlying mechanism influencing macroscopic mechanical properties. Additionally, the evolution patterns of contact normal magnitude and angle in anisotropic granular materials under cyclic loading conditions were also analyzed. The results of this study provided a new perspective on the macroscopic mechanical properties and the evolution of the microstructure of granular soils under anisotropic conditions.</div></div>","PeriodicalId":55217,"journal":{"name":"Computers and Geotechnics","volume":"184 ","pages":"Article 107292"},"PeriodicalIF":5.3,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143868572","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

SPH modeling of impact forces from heterogeneous soil-rock mixture landslides on a rigid obstruction 非均质土石混合体滑坡对刚性障碍物冲击力的SPH模拟

IF 5.3 1区工程技术

Computers and Geotechnics Pub Date : 2025-04-25 DOI: 10.1016/j.compgeo.2025.107302

Tang-Jin Yuan , Liu-Chao Qiu , Kai-Li Zhao , Yi Liu

{"title":"SPH modeling of impact forces from heterogeneous soil-rock mixture landslides on a rigid obstruction","authors":"Tang-Jin Yuan , Liu-Chao Qiu , Kai-Li Zhao , Yi Liu","doi":"10.1016/j.compgeo.2025.107302","DOIUrl":"10.1016/j.compgeo.2025.107302","url":null,"abstract":"<div><div>Soil-rock mixture landslides frequently occur in steep mountainous regions, indicating enormous destructive potential. Consequently, these landslides have attracted much attention from researchers in recent years. This paper presents a simple and effective meshless numerical method based on Smoothed Particle Hydrodynamics (SPH) to simulate the movement and impact forces of heterogeneous soil-rock mixture landslides. In this method, soil and rock are discretized as SPH particles with different material properties and are modeled as elastoplastic and elastic materials, respectively. The ideal elastoplastic model with a nonassociated flow rule, combined with the Drucker-Prager (DP) yield criterion, is employed to describe the constitutive response. First, the paper validates the soil pressure exerted on the bottom wall of a stationary container. Second, the impact experiment of a single rock sample is verified, and the effects of the rock density, shape, and drop height are further analyzed. Last, the proposed method is employed to simulate and validate the movement and impact force of homogeneous soil landslides, followed by heterogeneous landslides. The results indicate that the proposed method is feasible for simulating the movement and impact forces of heterogeneous soil-rock mixture landslides. Additionally, this method is simple to implement, highly flexible, and capable of accommodating arbitrarily-shaped rocks. The presence of rocks alters the characteristics of the impact force and partly increases the peak impact force, particularly in steep slope scenarios. These findings enhance our understanding of the complex phenomena associated with heterogeneous landslides, including debris flows that involve multiple phases and scales, and offer significant guidance for disaster prevention and mitigation in geological engineering.</div></div>","PeriodicalId":55217,"journal":{"name":"Computers and Geotechnics","volume":"184 ","pages":"Article 107302"},"PeriodicalIF":5.3,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143873357","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

An assessment of retrogressive behavior in soil-rock mixture slopes from MPM modelling to failure 土石混合边坡从MPM模型到破坏的退化行为评估

IF 5.3 1区工程技术

Computers and Geotechnics Pub Date : 2025-04-25 DOI: 10.1016/j.compgeo.2025.107284

Nan Qiao , Zhiying Dai , Lianheng Zhao , Qiujing Pan , Xiao Cheng , Xinyu Ye , Sanfeng Liu

{"title":"An assessment of retrogressive behavior in soil-rock mixture slopes from MPM modelling to failure","authors":"Nan Qiao , Zhiying Dai , Lianheng Zhao , Qiujing Pan , Xiao Cheng , Xinyu Ye , Sanfeng Liu","doi":"10.1016/j.compgeo.2025.107284","DOIUrl":"10.1016/j.compgeo.2025.107284","url":null,"abstract":"<div><div>Soil-rock mixture (SRM) slopes frequently undergo highly destructive retrogressive collapses. However, the retrogressive mechanisms remain poorly understood due to inherent structural heterogeneity and large-deformation behavior. This study systematically investigates the retrogressive behavior of SRM slopes using the material point method (MPM). Firstly, the rock block contours are acquired by close-range photogrammetry, and the rock block morphologies are quantified with the computational geometry algorithm, so a digital rock block database is established. Secondly, MPM models of SRM slopes are modelled using the digital image processing techniques. Finally, parametric studies are conducted to evaluate the effects of rock block content (RC), gradation, and soil strain-softening property on the retrogressive behavior of SRM slopes. In addition, the influences of grid size and particle density are also assessed through an experimental–numerical comparative analysis. A coupling effect between RC and gradation in governing retrogressive modes is revealed by the results, and the influences on the run-out distance are exhibited by the softening modulus and residual strength. Moreover, reference values for both the model height-to-grid size ratio and particle density are established in accordance with experimental validation. The findings can provide a theoretical foundation for the safety assessment and reinforcement design of SRM slopes.</div></div>","PeriodicalId":55217,"journal":{"name":"Computers and Geotechnics","volume":"184 ","pages":"Article 107284"},"PeriodicalIF":5.3,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143868574","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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