Article
Construction & Building Technology
Yuke Wang, Musen Han, Bin Li, Yukuai Wan
Summary: This paper proposes a new type of permeable polymer material for grouting anti-seepage reinforcement of dam slopes. The analysis shows that this method can greatly improve the stability of the slope, with good reinforcement effects for medium and low slopes.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Engineering, Geological
Ze Li, Yu Chen, Yakun Guo, Xiaoyan Zhang, Shigui Du
Summary: The study introduces a novel method, the element failure probability method (EFP), which considers the randomness of shear parameters and groundwater levels in order to analyze the reliability of soil slopes. By calculating the probability of slope failure using safety factors and velocity fields, the distribution of failure regions in space can be determined. This method could have theoretical value for further research in applying plastic limit analysis to analyze slope reliability.
INTERNATIONAL JOURNAL OF GEOMECHANICS
(2021)
Article
Engineering, Environmental
Xiao-Gang Wang, Xing-Chao Lin, Xing-Song Sun
Summary: In this paper, an upper bound limit analysis method for 3D slope stability analysis based on rigid block structure is proposed. The method offers a solution to the difficulty of solving the highly nonlinear optimization model with a large number of degrees of freedom and has been validated through numerical examples.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2022)
Article
Engineering, Civil
Shuvankar Das, Koushik Halder, Debarghya Chakraborty
Summary: This study analyzes the ultimate bearing capacity of an embedded strip footing on a rock slope subjected to seismic loading, showing that the magnitude of the bearing capacity factor decreases significantly with an increment in seismic loading, further decreasing with an increment in slope angle, and increasing with an increment in embedment depth. Stress contours are used to describe the combined failure mechanism of the footing-rock slope system under different embedment depths and types of loading.
GEOMECHANICS AND ENGINEERING
(2022)
Article
Engineering, Geological
Dowon Park
Summary: An exact solution for stability measures was derived, which satisfies both equilibrium and compatibility, and was applied to evaluate the stability factor and factor of safety for infinite rock slopes governed by the Hoek-Brown criterion, considering the presence of parallel seepage flow. The generalized Hoek-Brown criterion was directly utilized without typical approximations.
ROCK MECHANICS AND ROCK ENGINEERING
(2023)
Article
Engineering, Civil
Francesco P. A. Portioli, Michele Godio, Chiara Calderini, Paulo B. Lourenco
Summary: This study proposes a rigid block model for the displacement-based seismic assessment of local collapse mechanisms of masonry structures. The masonry is modeled as an assembly of two-dimensional rigid blocks in contact through frictional interfaces, and mathematical programming is used to solve the contact problems associated with elastic and rigid contact models. The research evaluates the accuracy of the modeling approach in reproducing the pushover curve of masonry panels subjected to horizontal seismic loads.
EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS
(2021)
Article
Engineering, Civil
Rui Zhang, Zukai Liu, Jing Pei Yang, Bingjun Shu, Shixuan Cui, Jiaan He, Yao Xiao
Summary: The study investigates the bearing capacity of strip footings near rock slopes under pseudo-static horizontal earthquake forces using the upper bound finite element limit analysis combined with a mesh adaptive strategy. The generalized Hoek-Brown failure criterion is applied to describe the strength properties of rock masses. By considering different governing parameters, the seismic bearing capacity factor is determined and non-dimensional charts for design purposes are provided.
JOURNAL OF EARTHQUAKE ENGINEERING
(2023)
Article
Computer Science, Interdisciplinary Applications
Quang N. Pham, Satoru Ohtsuka, Koichi Isobe, Vinh N. Pham, Hoa P. Hoang
Summary: The stability of a footing-on-slope system under coupled eccentric and inclined loading is a significant concern in urban areas. The rigid plastic finite element method (RPFEM) was employed to evaluate the ultimate bearing capacity of an eccentrically inclined loaded footing placed on a sand slope. The study focused on assessing the influence of soil strengths, footing width, and slope geometry on the three-dimensional V-H-M limit load space to determine its uniqueness.
COMPUTERS AND GEOTECHNICS
(2023)
Article
Geochemistry & Geophysics
Zhen Cui, Maochu Zhang, Qian Sheng
Summary: This paper introduces a new method to analyze the static and dynamic stability of complex rock slopes by combining the rigid discrete element method (DEM), shear strength reduction (SSR) method, and Newmark method. The new method allows for direct calculation of the safety factor and sliding forces of wedges without auxiliary assumptions, and is suitable for complex wedge structures in practical design. This approach has been validated in static and dynamic examples, with parameter analysis indicating potential underestimation of seismic displacement when evaluating solely based on pseudo-static safety factor. An example case demonstrates the use of the proposed method for seismic stability assessment and slope reinforcement scheme, highlighting cost-saving benefits compared to traditional methods.
Article
Engineering, Environmental
Shi Zuo, Lianheng Zhao, Hanhua Tan, Liang Li, Dongping Deng, Zhichen Song
Summary: This study presents a research method combining reliability theory to back-analyze the shear strength parameters of multi-layer sliding surfaces simultaneously. Through detailed analysis of three practical landslides, the feasibility and applicability of the proposed method have been validated.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2021)
Article
Engineering, Geological
Yuchao Li, Jianping Chen, Fujun Zhou, Yiding Bao, Zhihai Li, Shengyuan Song, Chen Cao
Summary: This study investigated the distribution characteristics and strength of 3D discrete fractures on a rock slope, and established a complex 3D discrete fracture network for stability analysis. The overall slope stability is good, but local block deformations are significant and prone to instability. The study highlights the importance of considering 3D fractured rock slope stability analysis in complex rock mass engineering assessments and disaster prevention.
Article
Engineering, Geological
Po-Tsun Yeh, I-Hui Chen, Kevin Zeh-Zon Lee, Kuang-Tsung Chang
Summary: The stability of rock slopes with weak planes was evaluated using empirical slope mass rating (SMR) and kinematic analysis, and a mechanical-based method was used to study the effects of weak plane orientations. The results showed that the SMR values and numerical safety factors exhibited similar trends, indicating the rationality of the approach. The determination of the lateral limit angle in kinematic analysis was found to be subjective, requiring consideration of actual conditions for accurate assessment.
ENGINEERING GEOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Ogbonnaya Igwe, Chinero Nneka Ayogu, Raphael Iweanya Maduka, Nnadozie Onyekachi Ayogu, Tochukwu A. S. Ugwoke
Summary: This paper presents the poor safety conditions of dump slopes in Nigerian mines through laboratory tests and numerical simulation. It reveals that high slope height and angle, as well as excessive material saturation caused by high seasonal rainfalls, can compromise the stability of the waste dumps. The authors advocate recycling and reusing waste rocks as engineering materials, particularly for tailing dam structures.
Article
Engineering, Environmental
Yi Tang, Hang Lin, Yixian Wang, Yanlin Zhao
Summary: This study derived a formula for calculating the stability of slopes with locked section structures, taking into account the mechanical properties of the rock mass. The model was validated using a slope in Xikou, Sichuan, China.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2021)
Article
Engineering, Civil
Dowon Park
Summary: Rock disturbance caused by blasting and stress relaxation is commonly observed during excavation. In stability analyses, a single value of disturbance is often applied to the entire rock mass, leading to underestimated results. This study addresses this modeling mistake by considering realistically varying rock disturbance. The safety of infinite slopes in a disturbed rock mass is investigated based on the kinematic approach of limit analysis.
GEOMECHANICS AND ENGINEERING
(2023)
Article
Computer Science, Interdisciplinary Applications
Yinghao Deng, Yang Xia, Di Wang, Yan Jin
Summary: This study investigates the mechanism of hydraulic fracture propagation in laminated shale, develops a numerical solver, and validates the effectiveness of the method through simulation experiments. The study also examines the influence of the interaction between hydraulic fractures and weak interfaces on the mechanical properties of shale.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Zhichao Zhang, Mingfei Feng, Guangshuo Zhou, Zhenglong Xu
Summary: A thermodynamic constitutive model for structured and destructured clays is proposed in this paper. The model includes state-dependent relations of hyperelasticity and plasticity without the concept of yielding surface. The proposed model captures the couplings between elasticity and plasticity and the effects of bonding structure.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Deze Yang, Xihua Chu
Summary: Creep and stress relaxation behaviors in granular materials are influenced by the time-dependent changes in their microstructure, with particle shape playing a significant role. However, the effects of particle shape on these behaviors are still not well understood. In this study, 3D DEM models incorporating the rate process theory and superellipsoids are used to simulate creep and stress relaxation in granular samples with different aspect ratios and blockiness. The results show that both aspect ratio and blockiness have a significant influence on creep and stress relaxation, with aspect ratio affecting creep through contact force ratio and blockiness affecting stress relaxation through variation in normal contact force anisotropy. These findings provide insights into the effects of particle shape on creep and stress relaxation in granular assemblies.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Shahab Amanat, Kourosh Gholami, Reza Rafiee-Dehkharghani, Dipanshu Bansal
Summary: This paper investigates the optimal design of wave barriers using the modified non-dominated sorting genetic algorithm-II (NSGA-II) and the Bloch-Floquet theory. The aim is to find the optimal design of plane wave barriers with a wide bandgap at a low-frequency range and low construction cost. The study develops a modified NSGA-II algorithm to determine the optimal arrangement of concrete in wave barrier unit cells. The performance of the optimal barriers is examined through finite element simulation and their efficacy in attenuating plane S-waves is verified.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Yanlin Su, Guoqing Cai, Fengjie Yin, Yepeng Shan, Annan Zhou
Summary: This paper presents a novel elastic-viscoplastic constitutive model that takes into account particle breakage to reproduce the time-dependent behavior of coarse-grained soil. The model integrates the Unified Hardening (UH) model, the elastic-viscoplastic (EVP) model, and the overstress theory. The relationship between particle breakage and loading rate is established, and state variables associated with the critical state of coarse-grained soil are derived to consider both time and particle breakage. A three-dimensional elastic-viscoplastic constitutive model is constructed by combining a one-dimensional viscoplastic hardening parameter with a secondary consolidation coefficient considering particle breakage. The proposed model requires 19 parameters and effectively describes the influence of time-dependency and particle breakage on the shear, dilatancy, and compression behaviors of coarse-grained soil with different confining pressures or initial void ratios. Experimental data comparisons validate the model's ability to replicate the time-dependent behavior of coarse-grained soil.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Shichao Zhang, Yaqiong Wang, Qidong Gao, Xiaobo Ma, Haixiao Zhou, Zhifeng Wang
Summary: Accurately evaluating and predicting ground settlement during tunnel excavation is essential for ensuring tunnel stability. This study conducted a probabilistic analysis of ground settlement under uncertain soil properties. The results demonstrate that spatially variable soils significantly influence the ground settlement in the vertical direction.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Xu Zhang, Bin Luo, Youjun Xu, Zhiwen Yang
Summary: This paper presents an analytical solution for horizontal displacements induced by small radius curve shield tunneling. The formula is derived based on the image method and Mindlin solution, considering additional thrust, frictional resistance, ground loss, and grouting pressure. The solution is validated with on-site data, demonstrating its reliability and providing a new approach for predicting and controlling stratum horizontal displacements in curve shield tunneling. The study finds that ground loss has the most significant influence on displacements, and soil closer to the tunnel exhibits larger horizontal displacements.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Jian-Hong Wan, Ali Zaoui
Summary: Ground vibrations during earthquakes can cause soil strength loss and structural damage. Rubber-soil mixtures (RSM) have shown promise in reducing residual ground deformation. This study used molecular dynamics simulations to investigate the friction behavior of the rubber-clay interface in RSM systems. The results revealed a direct correlation between normal stress and friction force, with denser soil systems exhibiting higher friction forces.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Hongying Wang, Qiang Zhang, Peinan Wu, Yanjing Li, Lijun Han, Guilei Han
Summary: In addition to the Mohr-Coulomb and Hoek-Brown criteria, other nonlinear functions are used to describe the plastic response of rock mass. This paper derived the equivalent cohesive strength, frictional angle, and dilatancy angle for nonlinear yield and plastic flow rock masses. The solution for a circular tunnel in any nonlinear yield and plastic flow rock masses was derived and verified using a numerical procedure. The analysis of strain-softening rock masses under two assumed nonlinear yield criteria was also studied.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Zhijun Wu, You Wu, Lei Weng, Mengyi Li, Zhiyang Wang, Zhaofei Chu
Summary: This study proposed a machine learning approach to predict the uniaxial compression strength (UCS) and elastic modulus (E) of rocks. By measuring meso-mechanical parameters and developing grain-based models, a database with 225 groups of data was established for prediction models. The optimized kernel ridge regression (KRR) and gaussian process regression (GPR) models achieved excellent performance in predicting UCS and E.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Mingjun Zhou, Zhenming Shi, Chong Peng, Ming Peng, Kahlil Fredrick E. Cui, Bo Li, Limin Zhang, Gordon G. D. Zhou
Summary: In this paper, the erosion and deposition processes during overtopping dam breaching are simulated using a novel method (ED-SPH). The proposed model is able to capture the complex behaviors of dam soil erosion, entrainment, and depositions. Soil deposition hinders particle movement and reduces water velocity at the water-soil interface.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
C. Chavez-Negrete, F. J. Dominguez-Mota, R. Roman-Gutierrez
Summary: To accurately simulate groundwater flow in porous layered media, it is important to consider all environmental factors and use a generalized finite differences scheme as a meshless method for spatial discretization. This approach ensures robustness and accuracy of the numerical solution.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Shuairun Zhu, Lulu Zhang, Lizhou Wu, Lin Tan, Haolong Chen
Summary: This paper investigates the effectiveness of the cascadic multigrid method applied to the improved Picard iteration method for solving nonlinear problems in deforming variably saturated porous media. Two improved Picard iteration methods are proposed, and their effectiveness is verified through numerical examples. The results show that the improved methods have faster convergence and higher computational efficiency compared to the classical method.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Yuan Cao, Yan-Guo Zhou, Kyohei Ueda, Yun-Min Chen
Summary: Investigated shear stress responses of enclosed soil in deep soil mixing (DSM) grid-improved ground, and revealed the characteristics of the waist effect and mathematical model for shear stress reduction ratio.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Jinfan Chen, Zhihong Zhao, Jintong Zhang
Summary: This study develops data-driven criteria to estimate the peak shear strength (PSS) of rock fractures, considering the effects of surface roughness features. A high-quality dataset is created using particle-based discrete element method and diamond-square algorithm. Tree-based models and convolutional neural network are trained to predict the PSS of rock fractures, and their reliability is verified using experimental data.
COMPUTERS AND GEOTECHNICS
(2024)