A5074803816- Rock Mechanics and Modeling
- Landslides and related hazards
- Geotechnical Engineering and Analysis
- Grouting, Rheology, and Soil Mechanics
- Geotechnical Engineering and Underground Structures
- Geotechnical and Geomechanical Engineering
- Composite Material Mechanics
- Geoscience and Mining Technology
- Ultrasonics and Acoustic Wave Propagation
- Model Reduction and Neural Networks
- Hydraulic flow and structures
- Drilling and Well Engineering
- Dam Engineering and Safety
- Scientific Innovation and Industrial Efficiency
- Tunneling and Rock Mechanics
- Geomechanics and Mining Engineering
- Structural Response to Dynamic Loads
- Geophysical Methods and Applications
State Key Laboratory of Hydraulics and Mountain River Engineering
2021-2024
Sichuan University
2021-2024
Duke Kunshan University
2021
The complex mechanical and damage mechanisms of rocks are intricately tied to their diverse mineral compositions the formation pores cracks under external loads. Numerous rock tests reveal a interplay between closure porous defects propagation induced cracks, presenting challenges in accurately representing properties, especially true triaxial stress conditions. This paper proposes conceptualization at mesoscopic level as two-phase composite, consisting bonded medium matrix frictional...
The initial in situ stress field influences underground engineering design and construction. Since the limited measured data, it is necessary to obtain an optimized field. Although present can be obtained by valley evolution simulation, accuracy of ancient has a remarkable influence. This paper proposed method using generative adversarial network (GAN) lateral coefficients A numerical model with flat terrain surfaces established. Utilizing nonlinear relationship between components burial...
The stress-strain curves and mechanical properties of Shuangjiangkou granite were obtained using five groups conventional triaxial tests under various confining pressures MTS815 rock test equipment. From the microscale, mesoscale, macroscale perspectives, four types mechanisms that contribute to energy dissipation during deformation investigated. Based on ratio, a new approach for estimating crack closure stress damage is proposed. ratio was substituted into Weibull distribution function,...
The in situ stress field is the fundamental factor causing deformation and damage geotechnical engineering, so it main basis for underground engineering design excavation. However, difficult to accurately obtain through most existing inversion methods areas with complex geological conditions. For problem of a relatively discrete nonlinear relationship measured Yebatan Hydropower Station area, new method called local correction (LSFC) combining genetic algorithm (GA), backpropagation (BP)...
As new ways to solve partial differential equations (PDEs), physics-informed neural network (PINN) algorithms have received widespread attention and been applied in many fields of study. However, the standard PINN framework lacks sufficient seepage head data, method is difficult apply effectively analysis with complex boundary conditions. In addition, type Neumann makes solution more difficult. This study proposed an improved prediction based on a aim calculating PDEs conditions such as...
The surrounding rock at the exit of No. 1 drainage tunnel Artashi Water Conservancy Project is micritic bioclastic limestone with 55% material. This underwent unpredictable large and time-dependent deformation during excavation. To date, mechanical behaviour this kind has rarely been studied. In study, traditional triaxial compression tests multilevel creep were conducted on limestone, results clarified instantaneous properties rock. Considering that essence failure crack growth, strain...
Time-dependent deformation and long-term stability of rocks are important issues in water conservancy geotechnical engineering. Currently, there no well-accepted theoretical criteria with which to predict damage considering time-dependent deformation. In-depth research is still needed. Multilevel creep experiments were performed on micritic bioclastic limestone obtained from a continuously deforming tunnel Xinjiang, China. Based crack strain theory, the axial evolution characteristics during...
An energy calculation parameter named the dissipation degree ( R Ud ) is introduced based on analysis of mechanism and evolution characteristics during conventional triaxial tests granite Shuangjiangkou. The deviatoric stress‒strain curve rock can be divided into five stages using four stress thresholds (crack closure σ cc , crack initiation ci damage cd peak p ), which also correspond to Udc Udi Udd Udp degree–strain curve. A given threshold increases with increasing confining pressure;...
Objectives: Based on the times analysis, we proposethe world digital currency, proposesthe currency tentative plan. The so-called is may distribute one kind of or as its initial nationality well other form like company personal currency. Then has analyzed competition, pointed out take national strategy competition foundation, must formulate good strategy, at last put forward thenew tobacco regulatory science paradigm.