在降雨条件下研究斜切锁定岩石斜坡的变形和故障特征
Hu Wang1, Guangxiang Yuan2, Zhiquan Huang3
1North China University of Water Resources and Electric Power, Henan, 450046, Zhengzhou, China.
Scientific reports
|June 19, 2024
概括
河南省的山体滑坡稳定性受到薄弱的间层和斜坡几何学的显著影响. 数字模拟显示,倾斜角度和高度的增加,加上特定的弱层间陷,会增加山体滑坡风险.
科学领域:
- 地质技术工程 地质技术工程
- 工程地质工程地质学
- 自然灾害研究自然灾害研究
背景情况:
- 河南省西部的山体滑坡灾难受到特定的地质和环境条件的影响.
- 具有"斜切"特征的多层岩石斜坡对稳定性分析提出了独特的挑战.
- 降雨是加剧该地区山体滑坡风险的关键因素.
研究的目的:
- 建立一个通用的模型"斜切"锁定岩石斜坡在分层岩石的形成.
- 分析这些斜坡在降雨条件下的变形,故障机制和稳定性.
- 研究弱层间层和几何参数对斜坡稳定的影响.
主要方法:
- 对"斜切"锁定岩石斜坡的通用模型的开发.
- 使用数值模拟技术来分析斜率行为.
- 研究不同弱层间倾斜角度和几何倾斜参数的影响.
主要成果:
- 弱层间层的倾斜角度极大地影响斜坡岩石质量变形和故障特征.
- 故障机制随着斜率几何参数的增加和弱层间入角度的增加而演变,包括滑动剪切和升降剪切故障.
- 斜坡的稳定性随着斜坡梯度和高度的增加而下降;临界值 (斜坡> 55°,高度> 55m) 显著增加了山体滑坡的概率.
结论:
- 薄弱的层间倾斜和几何因素是倾斜稳定的主要控制因素.
- 超过关键的斜坡角度和高度会导致剪切应力超过剪切强度,大大增加了山体滑坡风险.
- 该研究为在类似的地质环境中对山体滑坡危险评估和缓解策略提供了关键的见解.
相关概念视频
Behavior of Concrete Under Compressive Load
156
Concrete exhibits specific behaviors under different compressive loads. Understanding this is crucial for understanding its structural integrity. When concrete undergoes uniaxial compression, it tends to develop cracks that run parallel to the direction of the force. These parallel cracks stem from localized tensile stresses that occur perpendicular to the compression direction. Additionally, angled cracks may appear due to the formation of shear planes.
As the concrete specimen fractures under...
As the concrete specimen fractures under...
156
Stress-Strain Diagram - Brittle Materials
2.3K
Brittle materials, including glass, cast iron, and stone, exhibit unique characteristics. They fracture without considerable change in their elongation rate, indicating that their breaking and ultimate strength are equivalent. Such materials also show lower strain levels at the point of rupture. The failure in brittle materials predominantly results from normal stresses, as evidenced by the rupture created along a surface perpendicular to the applied load. These materials do not display...
2.3K
Relation between Poisson's ratio, Modulus of Elasticity and Modulus of Rigidity
263
Deformation occurs in axial and transverse directions when an axial load is applied to a slender bar. This deformation impacts the cubic element within the bar, transforming it into either a rectangular parallelepiped or a rhombus, contingent on its orientation. This transformation process induces shearing strain. Axial loading elicits both shearing and normal strains. Applying an axial load instigates equal normal and shearing stresses on elements oriented at a 45° angle to the load axis.
263
Plastic Deformations
85
It is essential to understand how structural members behave under plastic deformation when the bending stress exceeds the material's yield strength. This state of deformation permanently alters the shape of the member, in contrast to the linear elastic behavior observed before yielding. The strain at any point in the member is expressed in terms of maximum strain. Notably, the neutral axis, which coincides with the centroid during elastic bending, shifts away from the centroid under plastic...
85
Stress-Strain Diagram - Ductile Materials
701
The stress-strain relationship in ductile materials such as structural steel or aluminium is intricate and progresses through several stages. When a specimen is loaded, it initially exhibits a linear length increase, depicted by a steep straight line on the stress-strain diagram. It indicates the material is elastically deforming and will return to its original shape once unloaded. However, when a critical stress value is reached, plastic deformation begins. This stage sees substantial...
701
Stress on an Oblique Plane
532
Understanding stress on an oblique plane under axial loading is pivotal in material mechanics. This analysis offers insight into a material's durability and strength, which is crucial for civil engineering and structural design. Axial loading refers to force application along the material's central axis, causing compression or elongation and leading to normal stress. Normal stress occurs when a force acts perpendicularly to the material's area, resulting in compressive or tensile...
532


