Article
Environmental Sciences
Yu Lu, Kai Gu, Zhengtao Shen, Xiang Wang, Yuping Zhang, Chao-Sheng Tang, Bin Shi
Summary: This study investigates the effects of biochar particle size and dosage on the desiccation cracking characteristics of a silty clay. The results demonstrate that the application of 10% biochar with fine particle size has the best performance in inhibiting soil cracking, reducing surface crack ratio and crack width, while increasing crack segments and total length. Biochar affects the crack initiation and propagation process by altering the soil microstructure and thereby the crack parameters.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Hao Zeng, Chao-Sheng Tang, Cheng Zhu, Qing Cheng, Zong-ze Lin, Bin Shi
Summary: Soil desiccation cracking is a significant concern in various fields, and this study utilizes infrared thermal imaging to investigate the correlation between soil temperature and cracking behaviors, providing insights into the underlying mechanisms of soil cracking.
WATER RESOURCES RESEARCH
(2022)
Article
Engineering, Civil
John Ivoke, Mohammad Sadik Khan, Masoud Nobahar
Summary: This study investigates the hydraulic conductivity changes of highly expansive Yazoo clay under different wet-dry cycles. The results show that increasing wet-dry cycles can enhance the Kv of Yazoo clay. However, the consideration of climatic loads is often overlooked in design phases.
TRANSPORTATION RESEARCH RECORD
(2021)
Article
Geosciences, Multidisciplinary
Anjun Li, Shiji Wang, Junjia Cao, Xian Li, Zhenjiang Guo, Xun Yang
Summary: Desiccation cracking is a common phenomenon in purple soil subjected to rainfall-evaporation cycles, which affects the hydraulic and mechanical properties of the soil. The variability in aggregate size distribution leads to variations in crack morphology. In this study, the effects of aggregate size distribution on crack morphology were investigated, and regression analysis based on purple soil indices was conducted. The results showed that crack evolution in purple soil involves three stages, two intersection shapes, and three network forms. A cracking evolution function was proposed, and its fit for modeling the dynamic morphological characteristics of desiccation cracks was verified. The distribution of crack length, crack area, and clod area were well described, while crack width followed a bimodal Gaussian distribution. Multiple linear regression models between crack parameters and aggregate size distribution indices were established, indicating the significant effect of micro-aggregate state on crack morphology.
Article
Mathematics, Interdisciplinary Applications
Binbin Yang, Shichong Yuan, Zhenzhou Shen, Xiaoming Zhao
Summary: This study quantitatively described the irregular cracks formed during the damage evolution of civil engineering materials using fractals. It investigated the fractal characteristics of soil desiccation cracking under different substrate contact and permeability conditions and analyzed the effects of interface friction and permeability on soil cracking behavior, revealing the evolution characteristics and formation mechanisms of cracks in soil.
FRACTAL AND FRACTIONAL
(2022)
Article
Engineering, Geological
Thellen Kumar Puspanathan, Vihan Shenal Jayawardane, Suvash Chandra Paul, Kong Sih Ying, Sanjay Kumar Shukla, Vivi Anggraini
Summary: Biochar has been recognized as a stable and sustainable soil amendment material, but its effect on the desiccation behavior of coastal soils has not been well-studied. This study investigated the impact of exposing biochar-amended marine soil to varying temperatures on its swelling, evaporation, and cracking characteristics. The results showed that both unamended and biochar-amended soils experienced increased volumetric shrinkage with more thermal cycles. Different combinations of biochar content and particle size affected desiccation cracking and volumetric shrinkage differently.
Article
Engineering, Geological
Yilin Gui, Weng Yee Wong, Chaminda Gallage
Summary: This research paper investigates the impact of fiber inclusion on the behavior of clayey soil subjected to desiccation. The results show that increasing the fiber content can effectively reduce desiccation cracking.
INTERNATIONAL JOURNAL OF GEOMECHANICS
(2022)
Article
Engineering, Geological
Lin Li, Chao-Sheng Tang, Jin-Jian Xu, Yao Wei, Qing Cheng, Bin Shi
Summary: This study proposes a novel, eco-friendly approach to improve soil resilience to drought climate. The addition of an eco-friendly polymer has a significant suppression effect on soil evaporation, reduces crack formation, and improves soil strength properties. These findings are of great importance for enhancing soil resilience to extreme drought climate.
ENGINEERING GEOLOGY
(2023)
Article
Computer Science, Interdisciplinary Applications
Chengzeng Yan, Yuchen Zheng, Wenhui Ke, Gang Wang
Summary: This paper introduces a three-dimensional moisture migration model for simulating the moisture migration process in soil. It combines the model with the finite discrete element method to create a moisture migration-fracture model that can simulate soil shrinkage and cracking. The study comprehensively analyzes the influences of shrinkage parameter, water evaporation rate, and layer thickness on clayey soil desiccation cracking through experiments and simulation results.
COMPUTERS AND GEOTECHNICS
(2021)
Article
Agronomy
Zhuopeng Zhang, Xiaojie Li, Jianhua Ren, Shuang Zhou
Summary: The desiccation cracking phenomenon on the surface of cohesive soda saline-alkali soil in the Songnen Plain of China is significant for determining the mechanical properties, salinization status, and ecological environment of the soil. Laboratory-controlled cracking experiments were conducted, and crack characteristics such as length, area, contrast texture feature, and fractal dimension were extracted. The results showed that soil moisture decrease occurs in three stages, and the evaporation rate is negatively correlated with soil salinity. The study also established a multiple linear regression prediction model based on crack characteristics, which accurately predicted salinity parameters.
Article
Computer Science, Interdisciplinary Applications
Longxiao Guo, Guangqi Chen, Luqiang Ding, Lu Zheng, Jingyao Gao
Summary: This paper incorporates a proposed model into the original Discontinuous Deformation Analysis (DDA) to simulate the full desiccation process of clayey soils. The model focuses on soil suction and considers evaporation-induced soil volume shrinkage and suction-induced tensile failure. The results show that the model accurately captures the main features of the desiccation process and can be a promising approach for analyzing desiccation in clayey soils.
COMPUTERS AND GEOTECHNICS
(2023)
Article
Engineering, Multidisciplinary
Panyong Liu, Xin Gu, Yang Lu, Xiaozhou Xia, Erdogan Madenci, Qing Zhang
Summary: This study proposes an improved bond-based peridynamics model for soil shrinkage cracking, which can significantly weaken the mechanical properties of soil. The model is validated through simulations of soil rings and strips, showing great advantages in solving soil drying and cracking. The research provides a potential way for real-scale simulation and fine mechanism exploration in soil desiccation cracking investigation.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2023)
Article
Engineering, Environmental
Jun-Zheng Zhang, Chao-Sheng Tang, Cheng Zhu, Qi-You Zhou, Jin-Jian Xu, Bin Shi
Summary: This study presents a novel ERT-based method to characterize and quantify clayey soil desiccation cracking. The results show that ERT can effectively capture and image the cracking process, and the estimated cracking depths using ERT are consistent with experimental observation.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2023)
Article
Chemistry, Physical
Yaxing Xu, Xin Yao, Yan Zhuang, Wei Duan, Xidong Zhang, Shunlei Hu, Xiaoqiang Dong
Summary: Desiccation cracking is common in mud, clay, and pavement. This study focused on the effects of fibers on the evolution of desiccation cracking in soil-cement and found that the presence of fibers significantly influenced the crack propagation pattern and size, while having little impact on the evaporation rate of specimens. The addition of more fibers led to a significant decrease in crack area and length.
Article
Environmental Sciences
Christopher V. V. Henri, Efstathios Diamantopoulos
Summary: The physical properties of soils exhibit significant heterogeneity, and this spatial variability has a profound impact on conservative transport, although it is still not fully understood. Molecular diffusion, often overlooked, can have a counter-intuitive effect on transport by preventing non-Fickian tailing. This study focuses on macroscopically homogeneous soils with small-scale heterogeneity and analyzes the dynamic control of soil heterogeneity, advection, and diffusion on transport. Diffusion and its tortuosity-dependent spatial variability are found to have a significant impact on overall transport. The study highlights the complex interplay between soil heterogeneity, advection, and diffusion in transport and emphasizes the challenges of upscaling when the spatial variability of these key processes cannot be properly described.
WATER RESOURCES RESEARCH
(2023)
Article
Engineering, Geological
Gao-Feng Zhao, Yuliang Zhang, Senwei Hou, Lei He
Summary: This study investigated the small-scale tensile properties of rock using a microscope mechanical test system, and found that small-scale direct tension tests have advantages in studying rock tensile strength. The 3D printing material exhibited different tensile strength based on printing angle. Reproducing the experimental results via the lattice spring model strengthened the understanding of rock behavior and failure processes.
ROCK MECHANICS AND ROCK ENGINEERING
(2022)
Article
Thermodynamics
Bisheng Wu, Zhengda Lei, Gaofeng Zhao, Shanpo Jia, Xi Zhang, Robert G. Jeffrey
Summary: This paper develops a semi-analytical model to predict heat extraction in an enhanced geothermal system. The model is verified through comparisons with existing results and commercial software. By comparing the thermal performance of different well layouts, the optimal well layout is determined.
APPLIED THERMAL ENGINEERING
(2022)
Article
Computer Science, Interdisciplinary Applications
Zhe Li, Gao-Feng Zhao, Xifei Deng, Jianbo Zhu, Qianbing Zhang
Summary: In this study, the distinct lattice spring model (DLSM) is further developed to handle practical geotechnical problems by incorporating the Zienkiewicz-Pande (ZP) constitutive model, beam finite element, and birth-death particle method. The enriched DLSM is verified against analytical solutions and numerical results, and is then applied to analyze the stability of a deep foundation pit construction project. The numerical predictions of the enriched DLSM are compared with actual monitoring data, showing its potential as an alternative numerical method for stability and collapse analysis of deep foundation pit excavation.
COMPUTERS AND GEOTECHNICS
(2022)
Article
Engineering, Geological
Yilin Gui, Weng Yee Wong, Chaminda Gallage
Summary: This research paper investigates the impact of fiber inclusion on the behavior of clayey soil subjected to desiccation. The results show that increasing the fiber content can effectively reduce desiccation cracking.
INTERNATIONAL JOURNAL OF GEOMECHANICS
(2022)
Article
Computer Science, Artificial Intelligence
Ruixuan Zhang, Yuefeng Li, Yilin Gui, Jian Zhou
Summary: Blasting operations are commonly used in Civil and Mining Engineering for rock breakage, but they can cause severe damages to surrounding areas. This study develops a machine learning model to predict the air-overpressure induced by blasting, with the proposed RBF-2 network performing better than other models.
APPLIED SOFT COMPUTING
(2022)
Article
Chemistry, Multidisciplinary
Chuanqi Li, Jian Zhou, Daniel Dias, Yilin Gui
Summary: A novel machine learning model, KELM-GWO, was proposed for predicting rock compressive strength, with the best performance indices. Porosity was identified as the most important parameter for predicting UCS using the mean impact value (MIV) technique.
APPLIED SCIENCES-BASEL
(2022)
Editorial Material
Geosciences, Multidisciplinary
Yilin Gui, Zhiqiang Yin, Kun Du
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Engineering, Geological
Jia-Le Li, Gao-Feng Zhao
Summary: In this work, a discrete digital image correlation (DDIC) method is introduced to address the challenges of discontinuities and large deformations in small-scale tests on rock. The effectiveness and reliability of the proposed method are verified through various experiments, demonstrating its potential as a promising solution in rock mechanics studies.
ROCK MECHANICS AND ROCK ENGINEERING
(2023)
Article
Engineering, Geological
Xin-Dong Wei, Zhi-Qiang Deng, Qin Li, Yan Huang, Gao-Feng Zhao
Summary: In this study, a surface image-based 3D grain-based model (GBM) reconstruction method is proposed using digital image processing (DIP), periodic random packing, and the simulated annealing algorithm. The mineral compositions are extracted using the K-means clustering algorithm and quantified using the two-point probability function (TPPF). The 3D GBM is generated by a simulated annealing algorithm, and the computational efficiency is improved using periodic boundary conditions. The GBM reconstruction method is successfully tested for reproducing the mechanical behaviors of granite and interpreting the failure mechanism at the mesoscale.
INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS
(2023)
Article
Environmental Sciences
Miao Yu, Yilin Gui, Ryan Laguna
Summary: Recycled waste materials were used to improve clayey soil, but their effects on hydraulic conductivity and underlying mechanism were rarely studied. The study found that the addition of rubber crumb and crushed glass, as well as the stress state, significantly affected the soil's hydraulic conductivity. The hydraulic conductivity initially increased and then decreased as the concentration of recycled waste granules increased. Scanning electron microscope imaging revealed that the inclusion of recycled waste granules modified pore size and distribution, thereby influencing hydraulic conductivity-related parameters.
Article
Computer Science, Artificial Intelligence
Ruixuan Zhang, Yuefeng Li, Yilin Gui
Summary: In this study, a novel self-adaptive weighted kernel ridge regression (Sa-WKRR) was proposed to predict blast induced air-overpressure (AOp). The performance of the proposed Sa-WKRR was compared with 9 other machine learning models, and the results demonstrated that the Sa-WKRR had the best performance in predicting blast induced AOp.
APPLIED SOFT COMPUTING
(2023)
Article
Engineering, Geological
Nikolaos Reppas, Colin T. T. Davie, Yilin Gui, Ben Wetenhall, Samuel P. P. Graham
Summary: For Carbon Capture and Storage (CCS) procedures, it is vital to assess the stability of the wellbore during CO2 injection by considering stress changes in the surrounding rock due to temperature and pressure variations. This study investigated the impact of cooling on the mechanical properties of sandstone commonly found in the North Sea. Compression tests were conducted on dry and saturated sandstone samples under different confining pressures and temperature conditions. The results showed that increasing confinement and decreasing temperature enhanced the strength of the sandstone and decreased the Poisson's ratio.
ROCK MECHANICS AND ROCK ENGINEERING
(2023)
Article
Engineering, Geological
Fuxin Rui, Gao-Feng Zhao, Yuliang Zhang, Lifeng Fan, Xiaobao Zhao
Summary: This study develops a multiscale and multiphysics numerical modelling approach to quantitatively describe rock thermal damage under microwave and laser irradiation. The results suggest that the meso-structure and mineral composition of the rock have a significant influence on its thermal damage, while the temperature gradient has a relatively minor effect. The limitations of temperature measurement are likely the cause of the observed differences in rock thermal damage between muffle furnace heating and microwave heating.
ROCK MECHANICS AND ROCK ENGINEERING
(2023)
Article
Metallurgy & Metallurgical Engineering
Shi-ming Wang, Jia-qi Wang, Xian-rui Xiong, Zheng-hong Chen, Yi-lin Gui, Jian Zhou
Summary: In order to study the spalling failure characteristics of rock under oblique incidence of stress wave, a split Hopkinson pressure bar (SHPB) spalling test with a special shaped striker was simulated using Particle Flow Code (PFC). The results showed that the angle of the oblique section plays a significant role in determining the spalling failure characteristics. When the angle is greater than 45°, the stress wave is reflected into a tensile wave, while when the angle is less than 45°, the reflected stress wave is superimposed multiple times with the incident stress wave, inducing spalling of the oblique section.
JOURNAL OF CENTRAL SOUTH UNIVERSITY
(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)
