The general principle of installation of jacks and shade are shown on the photo. 471.
Under the protection of these beams, old foundations and masonry are broken out between the two adjacent beams to the upper shelf of the beams, then the boil (mines) is made and a new foundation is built to a height of 5 — 0.7 m, not reaching the lower shelves of beams. Between the erected foundation and the lower shelves of the beams, jacks are installed, transferring the load to the new foundation. In this position, the jack produces pressure on a new foundation for several days. During this time, brick masonry is made between beams with jamming in the upper plane. After appropriate exposure, the jacks are removed and the wedges between the beam and the foundation are weakened. Then the horizontal beams are removed and the gap between the summed up the foundation and the upper plane of the nest punched for the horizontal beam is laid and jammed. With this method of work, there is no reason to expect any deformations subsequently, since the foundation earlier than begins to carry the load from the structure, receives the necessary precipitation using the backward pressing with jacks.
