Point drainage intercepts water at gullies (points). Gullies connect to drainage pipes beneath the ground surface. Deep excavation is required to facilitate this system. Support for deep trenches is required in the shape of planking, strutting or shoring.
Channel drainage intercepts water along the entire run of the channel. Channel drainage is typically manufactured from concrete, steel, polymer, or composites. The interception rate of channel drainage is greater than point drainage and the excavation required is usually much less deep.
The surface opening of channel drainage usually comes in the form of gratings (polymer, plastic, steel or iron) or a single slot (slot drain) that runs along the ground surface (typically manufactured from steel or iron).
Earth retaining structures such as retaining walls also need to consider groundwater drainage. Typical retaining walls are constructed out of impermeable material which can block the path of groundwater. When groundwater flow is obstructed hydrostatic water pressure builds up against the wall and may cause significant damage. If the water pressure is not drained appropriately, retaining walls can bow, move, and fracture. The water pressure can also erode soil particles leading to voids behind the wall and sinkholes in the soil. Traditional retaining wall drainage systems can include french drains, drain pipes, or weep holes. Call us today to schedule any of these drainage installation options.
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