The important causes of failure of slopes and lead to instability are describes below: Gravitational force (Creep) Force due to seepage water (Swelling / Leaching) Erosion of the surface of slopes due to flowing water.
Which three factors are used to classify a slope failure?
- There are three criteria used to classify slope failures:
- The type of material that failed (e.g., bedrock or unconsolidated sediment),
- The mechanism of the failure (how the material moved as it failed), and.
- The rate of movement (how quickly the material moved).
What are the different types of failure in a slope?
- Rotational failure. When rotational failure occurs, the failed surface will begin to move outwards and downwards. …
- Translational failure. …
- Compound failure. …
- Wedge failure.
What are 3 factors that contribute to mass wasting?
The causes of mass wasting include an increased slope steepness, increased water, decreased vegetation and earthquakes. One of the types of mass wasting that is an example of the slope failing is a slump. This is the sliding of coherent rock material along a curved surface.Which of the following are types of slope failure?
- Translational Failure.
- Rotational Failure.
- Flow Failure.
- Block or Wedge Failure.
- Rock Slope Failure.
- Plane Failure.
- Toppling Failure.
- Rock Failure.
What factors influence slope stability?
Slope stability is ultimately determined by two factors: the angle of the slope and the strength of the materials on it.
What are the three types of mass wasting?
The most common mass-wasting types are falls, rotational and translational slides, flows, and creep.
What do you mean by slope stability?
Slope stability is the process of calculating and assessing how much stress a particular slope can manage before failing. Examples of common slopes include roads for commercial use, dams, excavated slopes, and soft rock trails in reservoirs, forests, and parks.What are the factors that may trigger mass wasting?
This wearing down, or erosion, is due to factors such as water, the steepness of the slope, the removal of vegetation, and disruptive events such as earthquakes. These factors trigger a process known as mass wasting, and in this lesson, you will learn more about this process and the triggers that put it in motion.
What are the external and internal causes of failure of slopes?Apart from external triggers like heavy rains, earthquakes, construction projects, there are also internal causes for slope failures. Slopes lose strength over time through numerous events and certain lithologies lend itself more to specific types of failure.
Article first time published onWhat are typical failures in geotechnical engineering?
According to Khan (2005, geotechnical failures can result from foundation factors such as change in water table, progressive soil erosion, soil heterogeneity, excavation activities, burrowing by animals, liquefaction of soil, and natural disasters such as earthquakes and landslides.
What is slope failure mining?
Slope failure relates to horizontal sliding upon critical interfaces. • Considering residual shear strength along the interfaces is the state of practice. • Stratigraphy dipping, tectonics, and water pressures also affect the stability.
Which situation is most likely to undergo mass wasting?
Rock and soil lithology. Unconsolidated or weak debris are more susceptible to mass wasting, as are materials that lose cohesion when wetted.
Which of the following is the most important factor in causing mass movement?
Gravity is the main force responsible for mass movements. Gravity is a force that acts everywhere on the Earth’s surface, pulling everything in a direction toward the center of the Earth.
Which of the following increases the risk of mass wasting?
Mass wasting is prone in the spring-time when snow melt, water saturation, and runoff is greatest. Also the type of climate will help determine the type of mass wasting. Humid climates tend to have slides, where water-saturated slopes fail and fall. Drier climates tend to have rocks that fall; especially early spring.
How do you increase slope stability?
Slopes can be stabilized by adding a surface cover to the slope, excavating and changing (or regrading) the slope geometry, adding support structures to reinforce the slope or using drainage to control the groundwater in slope material.
Which of the following can lead to the slope failure that causes mass movement quizlet?
Which of the following can lead to the slope failure that causes mass movement? saturation, oversteepening of slopes, earthquakes, and volcanic eruptions.
Which feature can strengthen slopes?
Plant roots add strength and cohesion to slope materials. They act like steel rebar reinforcements in concrete and increase the resistance of a slope to landsliding. Vegetation also adds weight to a slope. Water is almost always directly or indirectly involved with landslides, so its role is particularly important.
What are the main influencing factors in the type of motion in mass movement?
Such factors include: weathering or erosional debris cover on slopes, which is usually liable to mass movement; the character and structure of rocks, such as resistant permeable beds prone to sliding because of underlying impermeable rocks; the removal of the vegetation cover, which increases the slope’s susceptibility …
What is slope stability failure?
Slope stability refers to the condition that an inclined slope can withstand its own weight and external forces without experiencing displacement. … This phenomenon is known as slope failure or landslide.
What is factor of safety in slope stability?
The slope stability safety factor refers to the ratio of the soil shear strength to the shear stress of a possible sliding surface in the slope.
Why do earth slopes fail?
Seepage into the soil within a slope can increase the water content of the soil, thereby increasing its weight. If this increase in weight is considerable, specifically with the combination of other forces, it can lead to slope failure.
When face failure of slope occurs the slip surface passes through?
Further rotational failure may occur in three different ways : Slope failure or Face Failure:- The failure which occurs along the surface that passes through the toe is known as slope failure. It occurs when soil above the toe contains a weak stratum. In this case, the failure plane intersects the slope above the toe.
What is depth factor in slope stability?
b) Slope depth. c) Depth failure. d) Base failure. Explanation: The ratio of the total depth (H + D) to depth H is called the depth factor Df.
How do you mitigate slope failure?
- Drainage. Contractors who know what they’re doing will always draw up drainage plans to complement their slope repair plans. …
- Terracing & Benching. …
- Retaining Walls. …
- Friction Piles. …
- Sheet Piling. …
- Rock Bolts. …
- Shotcrete. …
- Geo-grid.
What is slope stability in geotechnical engineering?
Slope stability is the potential of a naturally occurring or engineered soil slope (for example, embankments, cuttings, open-pit mining, excavations, landfills, etc.) to withstand ground movement. A previously stable slope may become unstable, leading to mass movement.
What is base failure in mining?
Base failure: In this type of failure, the arc of the failure passes below the toe and in to base of the slope. This happens when the slope angle is low and the soil below the base is softer and more plastic than the soil above the base.
Which statement best describes the way vegetation affects slope stability?
Which statement best describes the way vegetation affects slope stability? Vegetation protects against erosion from raindrops and helps bind together soil and regolith. Which one of the following materials has the maximum, sustainable, slope angle, as determined by the angle of repose?
Which of the following is a common trigger of landslides?
Landslides can be initiated in slopes already on the verge of movement by rainfall, snowmelt, changes in water level, stream erosion, changes in ground water, earthquakes, volcanic activity, disturbance by human activities, or any combination of these factors.
What is a type of mass failure in which a superficial mass fails by moving as a whole along a definite surface of failure called?
What is a type of mass failure in which a superficial mass fails by moving as a whole along a definite surface of failure called? Explanation: A true landslide is a type of mass failure in which a superficial mass fails by moving as a whole along a definite surface of failure.
