On the purified concrete, for better connection with new concrete, a notch was made (in such cases, horizontal struts are often made, as shown at 457) and all naked concrete was plentifully pouring water. On the external trapezoidal sides of the foundation, reinforcement was installed (FOT. 458) and then new concrete of the composition 1: 4 was applied, and slag cement was adopted as more stable in relation to sulfates.
In the above example, the external surfaces of the foundation were scored at an angle of 45 ° to avoid stagnation of harmful liquids on the cuts of the foundation (459), and plastered by a protective layer from the influence of groundwater.
For a protective layer (Orti-quality on Portland cement), clay-earth cement is often used, which is quite stable against the action of fluids containing sulfates.
The device of a continuous foundation slab instead of incorrectly stuffed ostrich piles under the building of an electric bank (in Moscow on a non -clay passage). The reconstruction was caused by improper production of work on stuffing ostrich piles.
The foundations of this building were erected on the stuffed piles of an ostrich system with a diameter of 30-36 cm in the form of separate bushes blocked around the perimeter of the building with reinforced concrete beams. The length of the piles ranged from 8.0 to 9.5 m, depending on the depth of the limestone, to which drilling was carried out. All pillows above the piles were prismatic 1.0 m high.
When the building was erected to a height of 22 floors), a cross -cutting crack was formed in the reinforced concrete run of the basement overlap (FOT. 460) And, after some time, a number of cracks formed in different places of reinforced concrete rand beams.
When a newly under construction building is supposed to be founded on clogging stilts, then under the erected boundary wall, the clogging piles are replaced by profitable, so as not to cause shots of concussions and changes in the structure of the soil, which can entail deformation in the existing structure.
