Kum torbası: Revizyonlar arasındaki fark
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Yeni sayfa: "{{çalışma}} '''Kum torbası (siper)''', askeri alanda tahkimat şeklinde kullanılan kum torbası türüdür. ==Genel bilgiler== ==Galeri== <gallery> </gallery> ==Kayn..." |
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==Genel bilgiler==
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The military uses sandbags for field fortifications, or as a temporary measure to protect civilian structures. Because burlap and sand are inexpensive, large protective barriers can be erected cheaply. The friction created by moving soil or sand grains and multiple tiny air gaps makes sandbags an efficient dissipator of explosive blast.[1] The most common size for sandbags is 14 inches by 26 inches. These dimensions and weight of sand a bag this size can hold allows for the construction of an interlocked wall like brickwork. They are not too heavy to lift and move into place. They may be laid in excavated defences as revetment, or as free-standing walls above ground where excavations are impractical. As plain burlap sandbags deteriorate fairly quickly, sandbag structures that are meant to remain in place for a long time may be painted with a portland cement slurry to reduce the effects of rot and abrasion. Cotton ducking sandbags last considerably longer than burlap and are hence preferable for long-term use. However, the vast majority of sandbags used by modern militaries and for flood prevention are made of circular woven polypropylene. The easy availability to military personnel, size and construction of the bags has also led to the use of sandbags as makeshift hoods for prisoners of war.
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==Galeri==
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