Horizontal drains are appropriate for

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Study for the ASBOG 1 Geology Exam. Use flashcards and multiple choice questions for effective preparation. Each question includes hints and detailed explanations for better understanding. Prepare confidently for your exam!

Multiple Choice

Horizontal drains are appropriate for

Explanation:
Horizontal drains are used to reduce pore-water pressure within a hillslope, lowering seepage forces and increasing soil shear strength to stabilize the slope. By intercepting subsurface water and providing a path to remove it, they lower the groundwater level in the slope and raise the factor of safety against failure. This approach directly targets the water pressures driving instability, which is not addressed by draining a foundation, drilling groundwater wells, or sampling soils.

Horizontal drains are used to reduce pore-water pressure within a hillslope, lowering seepage forces and increasing soil shear strength to stabilize the slope. By intercepting subsurface water and providing a path to remove it, they lower the groundwater level in the slope and raise the factor of safety against failure. This approach directly targets the water pressures driving instability, which is not addressed by draining a foundation, drilling groundwater wells, or sampling soils.

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