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  2. Drainage - Wikipedia

    en.wikipedia.org/wiki/Drainage

    The water pressure can also erode soil particles, leading to voids behind the wall and sinkholes in the above soil. Traditional retaining wall drainage systems can include French drains, drain pipes or weep holes. To prevent soil erosion, geotextile filter fabrics are installed with the drainage system.

  3. French drain - Wikipedia

    en.wikipedia.org/wiki/French_drain

    French drains are often installed around a home foundation in two ways: Buried around the external side of the foundation wall; Installed underneath the basement floor on the inside perimeter of the basement [6] In most homes, an external French drain or drain tile is installed around the foundation walls before the soil is backfilled.

  4. Drainage equation - Wikipedia

    en.wikipedia.org/wiki/Drainage_equation

    the permissible long term average depth of the water table (Dw) on the basis of agricultural drainage criteria; the soil's hydraulic conductivity (Ka and Kb) by measurements; the depth of the bottom of the aquifer (Di) the design drain spacing (L) can be found from the equation in dependence of the drain depth (Dd) and drain radius (r ...

  5. Boy accidentally shoots 2-year-old brother to death after ...

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    A 7-year-old boy accidentally shot and killed his 2-year-old brother inside a truck parked in a California shopping center, authorities said. On Monday, just before 4 p.m. local time, the boy ...

  6. Drain-waste-vent system - Wikipedia

    en.wikipedia.org/wiki/Drain-waste-vent_system

    In the U.S., every plumbing fixture must also be coupled to the system's vent piping. [1] Without a vent, negative pressure can slow the flow of water leaving the system, resulting in clogs, or cause siphonage to empty a trap. The high point of the vent system (the top of its "soil stack") must be open to the exterior at atmospheric pressure.

  7. US searching for journalist Tice in Syria prisons, White ...

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    WASHINGTON (Reuters) -U.S. officials are communicating with people in Syria to seek information about Austin Tice, an American journalist captured there more than 12 years ago, White House ...

  8. What is micro-walking? Woman loses 66 lbs by adding this ...

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    Like many others who found themselves working remotely, Linette Miller, 59, noticed that she had become sedentary. “It suddenly dawned on me how little activity I get every day,” Miller, from ...

  9. Soil nailing - Wikipedia

    en.wikipedia.org/wiki/Soil_nailing

    Soil nail components may also be used to stabilize retaining walls or existing fill slopes (embankments and levees); this is normally undertaken as a remedial measure. Since its first application using modern techniques in Versailles in 1972, [ 2 ] soil nailing is now a well-established technique around the world.

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