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Base failure of a finite slope occurs when the soil _______.
- a)is purely cohesive
- b)is cohesionless
- c)below the toe is relatively soft and weak
- d)above the toe is relatively soft and weak
Correct answer is option 'C'. Can you explain this answer?
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Base failure of a finite slope occurs when the soil _______.a)is purel...
Stability analysis of Finite Slope:
(i) If the slope is of finite extend bounded by top and bottom surfaces, then it is termed as finite slope.
(ii) Failure of finite slope takes places due to rotation and failure plane is either circular or spiral.
(iii) Finite slope may have any of the following mode of shear failure.
(i) If the slope is of finite extend bounded by top and bottom surfaces, then it is termed as finite slope.
(ii) Failure of finite slope takes places due to rotation and failure plane is either circular or spiral.
(iii) Finite slope may have any of the following mode of shear failure.
- Slope failure
- Base failure
Slope failure:
- Face Failure: Failure surface passes through slope above the toe. This type of failure takes places in case of steep slope, soil mass near the toe is rigid or stringer in comparison to soil mass above the toe.
- Toe Failure: It is the most common mode of failure of finite slope in which failure surface passes through the toe. This failure also occur in steel slope when soil mass is homogenous above and below the toe.
Base Failure:
- Failure surface passes below the toe.
- This type of failure takes place when soil mass below the toe is soft and weak in comparison to soil mass above the toe.
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Base failure of a finite slope occurs when the soil _______.a)is purel...
Base failure of a finite slope occurs when the soil below the toe is relatively soft and weak. This means that the failure of the slope is initiated at the base or toe of the slope, and it is caused by the weakness or softness of the soil in that area.
There are several factors that contribute to base failure of a finite slope:
1. Soft and weak soil: The soil below the toe of the slope is relatively soft and weak, which means it has a low shear strength. This can be due to various factors such as low soil density, high water content, or presence of weak soil layers.
2. Increased stress at the base: The weight of the slope and any additional loads acting on it increase the stress at the base of the slope. The soft and weak soil is unable to withstand these increased stresses, leading to failure.
3. Saturation: If the soil below the toe of the slope is saturated with water, it can further reduce its shear strength. Saturation can occur due to heavy rainfall, poor drainage, or other water sources.
4. Toe erosion: Erosion of the soil at the toe of the slope can also contribute to base failure. The erosion can be caused by water flow, wind action, or other factors. As the soil erodes, the stability of the slope decreases, leading to failure.
5. Slope geometry: The geometry of the slope, including the angle of inclination and height, can also influence the occurrence of base failure. Steeper slopes are more prone to base failure as they exert higher stresses on the soil at the base.
In summary, base failure of a finite slope occurs when the soil below the toe is relatively soft and weak. Factors such as softness and weakness of the soil, increased stress at the base, saturation, toe erosion, and slope geometry all contribute to the occurrence of base failure. It is important to consider these factors in slope stability analysis and design to prevent base failure and ensure the stability of the slope.
There are several factors that contribute to base failure of a finite slope:
1. Soft and weak soil: The soil below the toe of the slope is relatively soft and weak, which means it has a low shear strength. This can be due to various factors such as low soil density, high water content, or presence of weak soil layers.
2. Increased stress at the base: The weight of the slope and any additional loads acting on it increase the stress at the base of the slope. The soft and weak soil is unable to withstand these increased stresses, leading to failure.
3. Saturation: If the soil below the toe of the slope is saturated with water, it can further reduce its shear strength. Saturation can occur due to heavy rainfall, poor drainage, or other water sources.
4. Toe erosion: Erosion of the soil at the toe of the slope can also contribute to base failure. The erosion can be caused by water flow, wind action, or other factors. As the soil erodes, the stability of the slope decreases, leading to failure.
5. Slope geometry: The geometry of the slope, including the angle of inclination and height, can also influence the occurrence of base failure. Steeper slopes are more prone to base failure as they exert higher stresses on the soil at the base.
In summary, base failure of a finite slope occurs when the soil below the toe is relatively soft and weak. Factors such as softness and weakness of the soil, increased stress at the base, saturation, toe erosion, and slope geometry all contribute to the occurrence of base failure. It is important to consider these factors in slope stability analysis and design to prevent base failure and ensure the stability of the slope.
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Base failure of a finite slope occurs when the soil _______.a)is purely cohesiveb)is cohesionlessc)below the toe is relatively soft and weakd)above the toe is relatively soft and weakCorrect answer is option 'C'. Can you explain this answer?
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