Article
Engineering, Geological
Ruiliang Zhang, Xinhua Xue, Chubing Deng
Summary: This study presents two approaches (i.e., the material point method (MPM) and gene expression programming (GEP)) for prediction of landslide runout. The modified MPM was verified through collapse and physical model tests. Sensitivity analysis was performed to investigate the importance of the softening parameters. A prediction equation based on GEP achieved a coefficient of determination of 0.8825. The effects of various factors on the maximum horizontal distance were quantitatively analyzed. The simulation and prediction results of MPM and GEP were compared and found to be within reasonable ranges with errors of 14.1% and 10.6%, respectively.
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
(2023)
Article
Engineering, Geological
Bing Li, Wenping Gong, Huiming Tang, Zongxing Zou, Victor Mwango Bowa, C. Hsein Juang
Summary: Landslides are destructive geohazards that can be estimated through numerical simulations. This paper presents a probabilistic analysis of the runout behavior of the Jiweishan landslide, explicitly considering the uncertainty in micro-parameter selection. Results obtained from PFC simulations provide improved estimates of landslide behavior and aid in risk assessment.
INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS
(2021)
Article
Engineering, Geological
Ling Zhu, Shenghua Cui, Xiangjun Pei, Xiaochao Zhang, Hui Wang, Shuang He, Luguang Luo
Summary: This study conducted a detailed field investigation and a series of tests to examine the mechanism of long-runout landslides. The results revealed that topographic conditions, soil characteristics, and changes in pore water pressure play important roles in long-runout movement. It was proposed that sliding surface liquefaction is the main reason for the formation of complex surface landforms and the long-runout movement of the studied landslides.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2022)
Article
Engineering, Geological
Yansong Zhang, Jianping Chen, Fujun Zhou, Yiding Bao, Jianhua Yan, Yiwei Zhang, Yongchao Li, Feifan Gu, Qing Wang
Summary: This study investigates a large paleolandslide and its impacts on river blocking and flooding in the upper Jinsha River, SE Tibetan Plateau, through optically stimulated luminescence dating and numerical simulations. The simulated results are consistent with field observations, providing new insights into landscape evolution.
Article
Engineering, Geological
Wenbin Chang, Qiang Xu, Xiujun Dong, Yu Zhuang, Aiguo Xing, Quan Wang, Xiangzhao Kong
Summary: This study analyzed the dynamic process and deposit characteristics of the Xinmo landslide in Maoxian County, Sichuan Province, China, through field investigation, seismic signal analysis, and numerical simulation. The results from numerical simulation were consistent with the field investigation and seismic analysis, providing more detailed criteria for accurately reconstructing the landslide dynamics.
Article
Engineering, Geological
Yang Gao, Bin Li, Han Zhang, Weile Wu, Jun Li, Yueping Yin
Summary: A new full three-dimensional landslide post-failure numerical platform (LPF3D) is proposed to simulate the actual physical and mechanical action process of mixed solid-liquid two-phase flow, enabling the prediction and assessment of post-failure risk for long runout flow-like landslides.
Article
Geochemistry & Geophysics
Laura Calabro, Tomaso Esposti Ongaro, Guido Giordano, Mattia de' Michieli Vitturi
Summary: In this study, a two-dimensional depth-averaged model was used to simulate the flow dynamics of caldera-forming pyroclastic currents. The effects of initial parameters on the deposit characteristics were examined, and the source parameters of the Pozzolane Rosse ignimbrite were reconstructed based on the ignimbrite depositional characteristics. The results show that the depth-averaged model is suitable for simulating inertial pyroclastic currents and can be used to assess hazards for future eruptions.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Geochemistry & Geophysics
A. Mitchell, K. E. Allstadt, D. George, J. Aaron, S. McDougall, J. Moore, B. Menounos
Summary: Inversion of low-frequency regional seismic records is increasingly being used to infer the volumes and dynamics of large landslides and to provide calibration information for numerical landslide runout models. This study systematically examines the impact of different rheologies and initiation conditions on the force-time function derived from landslide runout models, and applies the method to analyze three real rock avalanches. The findings highlight the importance of considering multiple collapses and their timing in shaping the force-time function.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Engineering, Geological
Kounghoon Nam, Fawu Wang, Zili Dai, Kongming Yan, Jianghong Wang, Jongtae Kim, Shuai Zhang
Summary: On August 9, 2022, a landslide occurred at a solar power plant in Gangwon Province, South Korea, due to heavy precipitation. This study analyzed the kinematic characteristics of the landslide-generated debris flow event using numerical modeling, aerial surveying, and laboratory tests. The results showed that the landslide had an average velocity of 0.848 m/s and a local maximum velocity of 3.138 m/s. The study provides valuable insights into landslide dynamics and can help mitigate the risks associated with similar events in the future.
Article
Engineering, Geological
Jia Mao, Xunnan Liu, Chong Zhang, Guoxin Jia, Lanhao Zhao
Summary: Prediction and investigation of long runout rock landslides are challenging and interesting, focusing on the interaction between constituent blocks and macro-scale response. Numerical simulations are used to predict potential impact regions, validated by benchmark experiments, providing a reference for hazard mitigation.
Article
Geochemistry & Geophysics
Michael J. Braunagel, W. Ashley Griffith, Robert F. Biek, David B. Hacker, Peter D. Rowley, David H. Malone, Danika Mayback, Tiffany A. Rivera, Zachary Loffer, Zachary D. Smith
Summary: This study conducted field observations and microstructural characterization of the Sevier gravity slide to better understand the physical processes and controls on runout distance. The findings suggest rapid emplacement during a single event, involving mobilization and pressurized injection of basal material. Evidence of slip delocalization and variations in basal zone characteristics and slide geometry were observed, indicating the presence of highly pressurized fluids and the importance of basal zone evolution in dynamic weakening mechanisms.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2023)
Article
Geography, Physical
Pedro Lima, Stefan Steger, Thomas Glade, Martin Mergili
Summary: Data-driven landslide susceptibility models are widely used to predict areas affected by landslides. However, these models often neglect the downslope propagation of landslides into flat terrain. This research compares three different models and reveals a potential underestimation of landslide threat in flatter areas.
Article
Geochemistry & Geophysics
Giulia Magnarini, Thomas M. Mitchell, Liran Goren, Peter M. Grindrod, John Browning
Summary: The emplacement mechanisms of long runout landslides across the Solar System and the formation mechanisms of longitudinal ridges associated with their deposits remain subjects of debate. The similarity of longitudinal ridges in martian long runout landslides and terrestrial landslides emplaced on ice suggests that an icy surface could explain both the reduction of friction associated with the deposition of long runout landslides and the development of longitudinal ridges. However, laboratory experiments on rapid granular flows show that ice is not a necessary requirement for the development of longitudinal ridges, which instead may form from convective cells within high-speed flows. These experiments have shown that the wavelength (S) of the ridges is 2-3 times the thickness (T) of the flow, which has also been demonstrated at field scale on a tens-of-kilometre martian long runout landslide.
EARTH AND PLANETARY SCIENCE LETTERS
(2021)
Article
Engineering, Geological
Bing Li, Huiming Tang, Wenping Gong, Zhan Cheng, Tianzheng Li, Lei Wang
Summary: This study uses the discrete element method to analyze the runout behavior of the Kamenziwan landslide in the Three Gorges Reservoir region. Through field survey and numerical modeling, the geological characteristics, failure mechanism, and runout behavior of the landslide are analyzed. The findings are of great importance for landslide risk assessment.
Article
Geosciences, Multidisciplinary
Yi Luo, Jiaming Zhang, Zhi Zhou, Juan P. Aguilar-Lopez, Roberto Greco, Thom Bogaard
Summary: This work presents an experimental and numerical study of preferential flow induced by desiccation cracks (PF-DC) considering the dynamic changes of cracks. Experimental results showed that the maximum crack ratio and aperture decreased with higher evaporation intensity, and self-closure phenomenon of cracks was observed during low-evaporation periods. Simulation results showed that the dynamic dual-permeability preferential flow model (DPMDy) better described crack evolution and hydrological response compared to the single-domain model (SDM) and rigid dual-permeability model (DPM) with fixed crack ratio and hydraulic conductivity.
HYDROLOGY AND EARTH SYSTEM SCIENCES
(2023)
Article
Engineering, Geological
Kun Fang, Minghao Miao, Huiming Tang, Shixun Jia, Ao Dong, Pengju An, Bocheng Zhang
Summary: This study analyzes the failure mechanism of a physical slope model under excavation through multi-field monitoring. The results show that the relative displacement and triangular shear plane reflect the deformation behavior of the slope, and the arch ring expands and deforms during excavation. The failure time of the slope can be effectively predicted using the inverse velocity method. Multi-field monitoring can reveal the behavior of the slope model from different perspectives and provide new insights into the failure mechanism of the slope.
Review
Geosciences, Multidisciplinary
Kun Fang, Huiming Tang, Changdong Li, Xuexue Su, Pengju An, Sixuan Sun
Summary: This article provides an overview of the application of centrifuge modelling in landslide science. It discusses the experimental principles, various triggering factors for landslide models, and methods for mitigating landslides in centrifuge. The behaviors of centrifuge models, including deformation and failure mechanisms, are also discussed. Based on this review, a best-practice methodology for preparing a centrifuge landslide test is proposed, along with suggestions for further research efforts.
GEOSCIENCE FRONTIERS
(2023)
Article
Engineering, Environmental
Bocheng Zhang, Yibing Ning, Huiming Tang, Bingdong Ding, Kun Fang, Zongxing Zou
Summary: Block-flexure toppling is a common toppling mode in interbedded anti-inclined slopes. Deep-seated large-area toppling failures along the Yalong River in Southwest China pose significant threats to hydropower infrastructure. The Mari landslide serves as a case study to investigate the evolutionary process of slope failure, revealing that the toppling deformation is controlled by the interbedded structure, steep slate foliations, and cross joints in metamorphic quartz sandstone perpendicular to the rock layer. The failure surfaces in the highly deformed zone controlled the development of the landslide induced by toppling, and the process of toppling mainly involves four stages.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2023)
Article
Engineering, Geological
Qiong Wu, Yuxin Liu, Huiming Tang, Jintao Kang, Liangqing Wang, Changdong Li, Di Wang, Zhiqi Liu
Summary: The influence of wetting and drying cycles (WDC) on the strength weakening of typical rocks in soft and hard interbedded rock masses has been investigated. A series of experiments were conducted on 116 rock samples to examine the effects of WDC on the physical and strength parameters of silty mudstone and silty sandstone. The results show that WDC increases water absorption rate and decreases longitudinal wave velocity, tensile strength, cohesion, and internal friction angle in both types of rock samples, with a greater effect observed in silty mudstone compared to silty sandstone.
ENGINEERING GEOLOGY
(2023)
Article
Engineering, Geological
Fumeng Zhao, Wenping Gong, Huiming Tang, Shiva P. Pudasaini, Tianhe Ren, Zhan Cheng
Summary: Land subsidence caused by over-exploitation of groundwater resources poses a significant hazard in many large cities globally. Assessing infrastructure risks under the threat of land subsidence is crucial for urban planning and design. This study proposes an integrated approach combining land subsidence, ground fissures, and elements at risk. Time-series Interferometric Synthetic Aperture Radar (InSAR) is used to study ground surface deformation, and differential settlement is assessed using an angular distortion index. Land use classification analysis is conducted to identify potentially affected elements using optical and radar images with an object-based approach. Finally, a risk matrix integrating differential settlement, ground fissures, and land use classification results is employed to assess land subsidence risk. The effectiveness of the proposed method is demonstrated through a risk assessment of land subsidence in Xi'an, China, and the advantages of synergetic land use classification over pixel-based classification are illustrated.
ENGINEERING GEOLOGY
(2023)
Article
Geosciences, Multidisciplinary
Kun Fang, Huiming Tang, Jichen Zhu, Zijin Fu, Pengju An, Bocheng Zhang, Chunyan Tang
Summary: A simplified geomechanical model was proposed to investigate the deformation behaviors of necking-type slopes. Three physical models of necking-type slopes were built according to the model, and preliminary calculations related to the arching effect were conducted. The evolution stages of necking-type slopes were presented based on the formation and disappearance of the arching effect. The proposed model and physical models provide guidance for the establishment of geomechanical and physical models of landslides.
JOURNAL OF EARTH SCIENCE
(2023)
Article
Engineering, Civil
Yunfeng Ge, Jenny Liu, Xiong Zhang, Huiming Tang, Xiaolong Xia
Summary: An innovative approach was developed to automatically measure cracks on concrete using 3D point clouds collected by a terrestrial laser scanner. The approach integrates various techniques to characterize the cracks and accurately determine their dimensions. The developed method was validated using two cases of surface cracks, and it showed good agreement with manual measurements and projection method.
JOURNAL OF INFRASTRUCTURE SYSTEMS
(2023)
Article
Engineering, Geological
Yunfeng Ge, Qian Chen, Huiming Tang, Bei Cao, Wakeel Hussain
Summary: This paper proposes a method for rapid and quantitative estimation of geological strength index (GSI) using 3D point clouds generated through non-contact measurement methods. The method includes acquiring point clouds using a terrestrial laser scanner, identifying discontinuities through artificial neural networks (ANN) and density-based spatial clustering of applications with noise (DBSCAN), extracting geometric information for the detected discontinuities, and estimating GSI according to the detection and characterization of discontinuities. The application results show that 3D point clouds can provide an objective and efficient way to obtain GSI values of rock mass and can be used as a potential alternative to the traditional GSI estimation method.
ROCK MECHANICS AND ROCK ENGINEERING
(2023)
Article
Engineering, Environmental
Yunfeng Ge, Geng Liu, Huiming Tang, Binbin Zhao, Chengren Xiong
Summary: This study evaluated the performance of different convolutional neural networks (CNN) in landslide susceptibility mapping, and found that CNN networks have higher accuracy compared to traditional methods. Among the networks, AlexNet and Xception performed better in landslide susceptibility assessment.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2023)
Article
Computer Science, Interdisciplinary Applications
Lei Xing, Wenping Gong, Bing Li, Chao Zhao, Huiming Tang, Lei Wang
Summary: Earthquake-induced rock slope failure is a destructive geohazard that poses serious threats to human lives and properties. The potential hazard of a rock slope under earthquake loading can be assessed by considering the characteristics of failure and runout, which are affected by inherent fractures. Traditional deterministic analysis of rock slope hazard may lead to uncertainties due to differences between arbitrarily chosen discrete fracture networks (DFNs) and true DFNs. To address this issue, this paper proposes a probabilistic analysis that uses multiple realizations of systematically generated DFNs, obtained through Monte Carlo simulation, as inputs for discrete element method (DEM) modeling of slope behavior, thus explicitly considering and evaluating the uncertainty induced by DFN modeling.
COMPUTERS AND GEOTECHNICS
(2023)
Article
Engineering, Geological
Jia-Qing Zhou, Fu-Shuo Gan, Changdong Li, Huiming Tang
Summary: Through massive direct numerical simulations, we have found a seemingly irrational dependency of inertial permeability on the volumetric flux range. This dependency is closely related to the evolution of microscale eddies and macroscale flow regimes. Based on this finding, we propose the concept of global inertial permeability and establish two parametrized criterion models for calculating it. These findings are of great significance for accurately evaluating the hydraulic conductivity of rock fractures and have applications in various geophysical and industrial fields.
ENGINEERING GEOLOGY
(2023)
Article
Engineering, Geological
Yang Ye, Changdong Li, Yawu Zeng, Huiming Tang
Summary: In this study, a three-dimensional discrete element model considering random microcracks was used to investigate the variability of mechanical parameters of rock. The results showed that the presence of microcracks significantly affected the coefficient of variations and average values of the mechanical parameters. The parametric study indicated that the effect of random microcracks on the coefficient of variations was significant, while the effect of grain size variation was negligible.
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
(2023)
Article
Engineering, Geological
Yunfeng Ge, Bei Cao, Qian Chen, Yu Wang
Summary: A new method based on colour space was proposed for the semi-automatic identification and orientation calculation of rock joints to improve the automation accuracy of rock joint mapping. The method includes four steps: calculating point colour space and point curvature, identifying rock joint sets from point clouds, extracting single rock joints using DBSCAN, and determining the orientation based on the point normals. The effectiveness of the proposed method was verified through examples.
QUARTERLY JOURNAL OF ENGINEERING GEOLOGY AND HYDROGEOLOGY
(2023)
Article
Environmental Sciences
Bo Lu, Jichen Zhu, Yunfeng Ge, Qian Chen, Zhongxu Wen, Geng Liu, Liangquan Li
Summary: A new method for automatic volume determination of loose engineering deposits (LEDs) using point clouds collected by terrestrial laser scanning is proposed in this study. The method solves the problem of lacking bottom surface point clouds during scanning process and achieves accurate volume calculation through techniques such as plane fitting and projection.
