The next step could be car -spaced highways in the city center. Their transfer underground would allow not only to free the territory, but also to exclude noise and visual pollution, to prevent exhaust gases entering the air through their fans from the bottom of the tunnels (exhaust gases are heavier than the air) with subsequent purification and release into the air into the air. Lighting can be natural, arranged through openings, lanterns, pits, as well as combined – natural and artificial or completely artificial. Decisions have been developed to enter concentrated natural light on the lower tiers of underground buildings.
Returning to the problem of training engineering personnel for underground construction, I want to pay attention to those issues that should be primarily covered in the training course.
First of all, you need to focus on the analysis of the type and condition of the containing soil, as this often determines not only constructive solutions and technologies, but also the very possibility of construction. It is necessary to consider the preservation and restrictions of deformations of ground buildings and structures, including all known and effective methods for strengthening the array.
Much attention in the training course needs to be paid to building materials, especially the waterproofing of an underground facility and isolation from the penetration of radon. I must say that at present, in addition to the known methods for increasing the water resistance of concrete (the purpose of the brand on water resistance, increasing density, introduction of additives, the use of special types of concrete, traditional and not always effective waterproofing methods, etc. D.), numerous new and fairly effective methods of waterproofing underground buildings (external continuous plastic insulation in the form of plates or thick films, bentonite mats, various coating of the Xipex and others) have been developed. They can be used separately or together with water removal measures using drainage.
My brother wanted to buy a one -room apartment, but it turned out that this was not so easy to do. There is currently an increased demand for one -room apartments, which in turn has raised them in price. Therefore, in some cases it is better to take a loan at the bank and buy a two -room apartment for yourself.