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Контрольная работа №2 для студентов ФБФО, II семестр (II вариант) ЗАДАНИЕ №1 Прочитайте и переведите текст в окне ниже. Strip Foundation.
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Контрольная работа №2 для студентов ФБФО, II семестр (II вариант) ЗАДАНИЕ №1
Прочитайте и переведите текст в окне ниже.
Strip Foundation.
Strip foundations consist of a continuous strip, usually of steel reinforced concrete, formed centrally under load bearing walls. This continuous strip serves as a level base on which the wall is built. It is of such a width to spread the load on the foundations to an area of subsoil. This subsoil should support the load without undue compaction. The bearing capacity of the soil should be greater than the loads imposed by the buildings foundation. The continuous strip of concrete is spread in the trenches excavated down to a level of compact soil. The strip of concrete may need to be no wider than the thickness of the wall. In practice the concrete strip will generally be wider than the thickness of the wall for convenience of covering the whole width of the trench and to provide a wide enough level base for bricklaying below ground. A continuous strip foundation of concrete is the most economic form of foundation for small buildings on compact soils. The width of a concrete strip foundation depends on a bearing capacity of the subsoil and the load on the foundations: the greater the bearing capacity of the subsoil, the less the width of the foundation and vice versa. Distribution of the load over a larger area reduces the load per unit area on the ground. Strip foundations on subsoils with poor bearing capacity, such as soft sandy clays, may need to be considerably wider than traditional (narrow) strip foundations. However, to keep increasing the width and depth of the concrete ensuring that the foundation does not shear makes the process uneconomical. The alternative is to form a strip of steel-reinforced concrete.
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