Question

Which of these is not an effective way to stabilize a slope failure in rock?

A) Drainage of Water from the slope
B) Building a rock pile above the Slope
C) Retaining Walls
D) Mechanical Stabilization

Answer 1

Building a rock pile above a slope is not an effective way to stabilize a slope failure in rock because it increases the weight on the slope, potentially leading to further instability.

Step-by-step explanation:

The question asks which method is not an effective way to stabilize a slope failure in rock. To answer this, let's look at the common causes behind slope failures and landslides. Erosion by rivers, glaciers, or ocean waves can create over-steepened slopes, while rock and soil slopes might weaken due to saturation from snowmelt or heavy rains. Earthquakes, especially those of magnitude 4.0 or greater, can trigger landslides by creating stresses on already weak slopes. Volcanic eruptions can result in loose ash deposits, heavy rain, and debris flows that also destabilize slopes. Moreover, the excessive weight from the accumulation of rain, snow, stockpiled materials, or man-made structures can overwhelm slopes, leading to failure.

Considering these issues, drainage of water (A), retaining walls (C), and mechanical stabilization (D) are generally recognized as effective means to stabilize slopes, as they can mitigate some of the problems leading to landslides. Conversely, building a rock pile above the slope (B) is not an effective way to stabilize a slope in rock, as it adds extra weight and can increase the potential for failure.