A5100424838- Landslides and related hazards
- Rock Mechanics and Modeling
- Geotechnical Engineering and Analysis
- Grouting, Rheology, and Soil Mechanics
- Geotechnical Engineering and Underground Structures
- Thermography and Photoacoustic Techniques
- Mechanical Behavior of Composites
- Cryospheric studies and observations
- Geological and Geochemical Analysis
- Geotechnical and Geomechanical Engineering
- Soil and Unsaturated Flow
- Tunneling and Rock Mechanics
- Drilling and Well Engineering
- Aeolian processes and effects
- Flow Measurement and Analysis
- Composite Material Mechanics
- Geotechnical Engineering and Soil Stabilization
- Simulation and Modeling Applications
- Conservation Techniques and Studies
- Hydraulic flow and structures
- Laser Material Processing Techniques
- Surface Roughness and Optical Measurements
- earthquake and tectonic studies
- Smart Materials for Construction
- Fire effects on ecosystems
Chang'an University
2020-2025
Ministry of Natural Resources
2024
Shanghai Institute of Optics and Fine Mechanics
2023
Xi'an Jiaotong University
2022
Tongji University
2015
Nagoya University
2005
University of Alberta
2001
Abstract Loess covers approximately 6.6% of China and forms thick extensive deposits in the northern northwestern parts country. Natural erosional processes human modification loess have produced abundant, potentially unstable steep slopes this region. Slope deformation monitoring aimed at evaluating mechanical behavior a slope has shown cyclic pattern contraction expansion. Such strain change on materials can damage contribute to instability. The site showing is 70-m high near Yan’an city...
Abstract Background Loess is prone to large deformation and flow slide due natural artificial interfaces inside. The strength of these controls the mechanical properties loess. Obtaining their parameters through in-situ testing essential for evaluating stability in loess engineering with interfaces. Methods By developing a borehole micro static cone penetration system creating various types interfaces, extensive model tests were conducted observe changes tip resistance during penetration....
Loess slopes with steep gradients are particularly prone to vertical tension cracks at the crest, resulting from unloading and other factors. These significantly affect spatiotemporal distribution of moisture infiltration during rainfall, potentially leading slope instability. This study investigates impact crest-tension on in loess under extreme rainfall conditions, focusing crack position, depth, width. Soil content dynamics wetting fronts were monitored assess how these influence...
摘要: 石窟寺作为弥足珍贵的文化遗产，受内外因素的长期影响，劣化严重，失稳破坏现象频发.为更好地开展石窟文物保护，对石窟寺岩体劣化失稳方面的研究成果进行了系统梳理.在阐述石窟寺岩体劣化和破坏研究的基础上，从成岩环境与区域地质、区域环境演化、可溶盐、水环境、生物作用、洞窟形制和多因素耦合共7个方面总结了各因素作用下石窟寺岩体的劣化机制与失稳机理，指出石窟寺岩体劣化失稳的根本原因是内外因素引起的力学作用、物理作用、化学作用、生物作用的相互耦合，往往表现为岩体内部微结构产生-拓展-贯通-成网的演化过程，并导致岩体发生累积性和瞬时性破坏.石窟寺岩体的劣化失稳表现出多样性和地域差异性，研究思路可相互借鉴，并由此展望了石窟寺岩体保护在多尺度、多手段、多因素耦合和多区域联合等方面的研究需求. 关键词: 石窟寺 / 文物保护 岩体劣化失稳 影响因素 耦合作用 工程地质学
Jiali Fault plays a key role in the dextral fault system southeastern Tibetan Plateau. Although it forms striking topographic lineament Yigong and Parlung Rivers, evidence for faulting Holocene has been equivocal. In this study, sediment deformation caused by was discovered debris flow fan near Guxiang barrier lake. A palaeo-earthquake event that occurred between 3494 2865 cal B.P. revealed, as evidenced geological, seismic, radiocarbon dating investigations. On basis of compilation results,...
Abstract The analysis of slope stability involves complex geological and topographical boundary conditions, nonlinear behavior material stress-strain, coupling initial in-situ stress, water pressure seismic load, etc., in most cases, analytical solutions cannot be obtained. Under the background continuous development computer calculation method, numerical method represented by finite element has been gradually popularized applied geotechnical engineering 1970s, developed into a powerful...
Abstract This study was carried out to seek a suitable model describe flow through orifices. The of developing short ducts found be adequate. There were two free parameters in the equation involving normalized pressure drop and Reynolds number. Experiments performed using Plexiglas tanks separated by an orifice. liquid level height variation with time recorded. A unique parametric estimation technique used determine from dynamic data. It that direct use experimental data (liquid heights) is...
Progress report is made on the development of a multimodal inspection technique for surface/sub-surface defect characterizations large-aperture optics. A high-speed laser scattering imaging with sensitivity at 200-nm scale used discovery The provides statistical results defects After that, multifunctional microscopic method local review. photothermal scanning microscopy specific characterization absorption defects, and confocal sub-surface defects. review information classification. Based...
摘要: 干湿循环作用对石窟砂岩影响严重,造成了大量石窟砂岩的悬臂拉裂式破坏. 通过室内干湿循环试验、巴西劈裂试验以及应变场分析等方法,分析了不同干湿循环次数下试样的内摩擦角φ、粘聚力c、微观结构、以及应变场特征的变化规律. 研究发现随着干湿循环次数的增加,粘土矿物逐渐流失,结构变得松散,矿物颗粒间的胶结作用减弱,导致了砂岩粘聚力c的减小. 同时由于砂岩内部颗粒形状以及孔隙结构的变化改变了颗粒间的接触关系,导致了内摩擦角φ的减小,最终造成了其拉裂力学性质的劣化. 最后结合试样的破坏过程及裂纹展布总结出了不同干湿循环作用下石窟砂岩的两种破坏模式. 关键词: 岩石力学 / 干湿循环 石窟砂岩 抗拉强度 劣化机理
Instability behavior of the levee on soft foundation at end construction and during rapid drawdown, respectively, is investigated by centrifuge tests. Soft ground made from remolded clay cakes using muddy in-situ Huai-He River's a flood channel to sea. The factor safety against sliding acquired overloading model failure increasing centrifugal acceleration, surface determined map vectors movement slope cross-section. It found that concerning instability construction, deep seated one, which...