Subsurface drainage refers to the system designed to remove excess water from the soil beneath the ground surface, which is crucial for maintaining soil stability and preventing erosion. By facilitating the movement of water away from slopes and other vulnerable areas, subsurface drainage plays a vital role in slope stabilization techniques, particularly through drainage methods that minimize water accumulation and pressure in soil layers. This method effectively reduces pore water pressure, enhancing soil strength and promoting safer construction practices.
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