Constructed Foundations

Posted by marmara on July 20, 2015

The consequence of incorrectly constructed foundations are skewed verandahs, porches, windows, seizing two-yard, causing cracks in the brick or block masonry walls. You can often see excessive lifting one corner of the house and hang the other, torn from its foundation, the slopes of the columnar foundations, cracks in the backing, etc. If the survey today 10 owners of summer houses, 7 of them confirm that the problems with foundations and as a consequence – to the house, they have. For a while, the house owner to put up with defects, but very soon he is forced to repair the house, enhance or alter the foundation. The cost of such repairs, in some cases may exceed the cost of the primary unit of the foundation. Selecting the type of foundation and its constructive solutions depends on the type of house (wall material, number of floors, interior layout, etc.).

and from the allowable loads on the base, the degree of heaving soils. The higher the latter, the great demands imposed on the spatial stiffness and strength of the foundation, more complex device base and the greater the effort and cost of construction of the foundation. Therefore, a prerequisite for the construction of a reliable and at the same time, low-cost foundation is a survey of the construction site to determine the degree of Frost-ground. This – the main indicator that affects the choice of design and technology of its foundation device. In Foundation Engineering Frost-sensitive soils are subdivided into five types: almost nepuchinistye weak, medium, strong and chrezmernopuchinistye. The ability of soils to show during the freezing of distending properties characteristic of the whole territory of Russia. In the Moscow region the medium-and silnopu-chinistye primers are 70-75%. During the freezing of heaving soils there are significant forces acting on the foundation. In soil shear strength of swelling, acting on the lateral surface of the buried foundations, can reach 7 ts/m2 in soils – 9 ts/m2 in – 11 ts/m2. Normal frost heave forces acting on the sole foundation laid above the freezing depth, can reach values of 5 or more times the tangent.

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