A5078612759- Landslides and related hazards
- Rock Mechanics and Modeling
- Geotechnical and Geomechanical Engineering
- Grouting, Rheology, and Soil Mechanics
- Fatigue and fracture mechanics
- Hydrology and Sediment Transport Processes
- Material Properties and Failure Mechanisms
- Soil and Unsaturated Flow
- Cryospheric studies and observations
- Elasticity and Material Modeling
- Geotechnical Engineering and Analysis
- Tunneling and Rock Mechanics
Tongji University
2018-2024
Landslide-debris flow is a sudden geological hazard in mountain areas, which characterized with large scale, fast speed and wide impact range, often causes disastrous accidents. In this study, an indoor sliding chute test was used to study the movement process of landslide-debris its accumulation pattern valley, taking into account initiated gradient particle size distribution. Besides, model reproduced by PFC numerical models were constructed fit actual situation flow. The results show that...
The rheological phenomenon of rock mass affects the long-term safety engineering. In this study, gneiss samples with different 3D morphologies are prepared by splitting tests and tested through multi-step creep tests. strength discontinuities is determined using several methods. test results show that as morphological parameter increases, deformation, rate, duration failure all decrease. linearly related to parameter. Based on principle damage mechanics for mass, a variable introduced in...
Basalt platforms are widely distributed in many areas of China, where landslides occur frequently. It is well recognized that landslide hazards seriously threaten engineering constructions and property safety. is, therefore, great significance to understand deformation failure behaviors their mechanisms basalt slopes reduce the loss caused by landslides. In this work, Pengshan Landslide Zhejiang Province taken as a prototype slope model tests carried out. During tests, real-time monitoring...
In order to study the instantaneous mechanical properties of rock mass discontinuities with different 3D morphologies during shear process, Brazilian splitting method is used prepare natural discontinuities, and high-precision scanning test carried out. The <math xmlns="http://www.w3.org/1998/Math/MathML" id="M1"> <msub> <mrow> <mi>Z</mi> </mrow> <mn>2</mn> </msub> </math> selected as evaluation parameter discontinuities. Based on graded cyclic results influence morphology characteristics...
The stress relaxation behaviors of discontinuities under cyclic loading have been rarely investigated. In this study, is applied to for shear tests, in which the initial stresses are equal each cycle. Stress patterns manifested curves divided into viscoelastic and viscoplastic relaxation, whose mechanisms attributed viscous deformation crack activities stressed discontinuities. Then, loading, associated with modulus cumulative (Em) anti-relaxation Capacity (ARC), γ, analyzed, it results that...
摘要: 工程岩体开挖会遇到各种复杂应力条件，岩体在荷载作用下随时间会产生流变现象，这种“累进性破坏”导致工程岩体常出现滑坡、塌方、大变形和支护困难等问题.为解释天然岩体结构面的流变现象，以天然红砂岩结构面为研究对象，基于结构面三维形貌扫描试验、结构面分级加载剪切蠕变试验，对天然岩体结构面的剪切蠕变特性进行系统研究.研究发现，岩体结构面蠕变变形量与蠕变应力和结构面三维形貌特征指标正相关；岩体结构面蠕变曲线可分为3个阶段，即过渡蠕变、稳态蠕变和加速蠕变阶段，当法向应力一定时，结构面三维形貌特征指标越大，发生的蠕变破坏越剧烈；基于结构面剪切蠕变曲线与剪切蠕变速率曲线特征，建立了参数物理意义明确的岩体结构面剪切蠕变经验模型. 关键词: 红砂岩 / 岩体结构面 形貌特征 蠕变曲线 本构模型 岩土工程