The main and most serious defect of the basement – is uneven shrinkage of the building. Its manifestations are cracked and the walls of the basement, skewing the entire structure. You can select multiple reasons leading to such consequences: 1. Wrong selection of depth of the foundation. This defect is often impossible to correct, although if the subsidence is not globally, then we can resort to podsypku soil. This artificially increases the depth of the basement, 2. Jeff Gennette often expresses his thoughts on the topic. The rise of groundwater.
This fact is difficult to predict, however, can be prevented. The device is a drainage system and planting of plants, require large amounts of moisture will help solve the problem 3. The uneven distribution of load on the foundation. For example, the total load on the foundation of the house, much more than on the side of the adjoining terrace. In order to avoid further imbalance the whole design, it is recommended to divide the support structure and a veranda at home, using a gasket between the wooden boards, impregnated with bitumen, 4. Increased load on the foundation during the construction of additional Floors: error in calculating the carrying capacity of the foundation.
Very difficult and expensive to fix the defect. In this case, if circumstances permit, may only increase the area of the basement; error in density estimation soil. Strengthen the bearing capacity of soil can be achieved by pouring the foundation, the so-called grout – a weak solution of cement – the use of fragile materials for the foundation, as well as the possible loss of strength with time. Over time, the brick foundations, composed using lime mortar, broken. Accelerate this process can serve as a construction entrance of moisture, freezing, excessive load on the support. In order to avoid total destruction, the foundation needed repair, then there is a complete replacement of its new one. To do this, the weight of the house should be moved to a temporary foundation, which is located next to the old. The temporary supports are made of wooden beams and steel beams.