SU1184882A1 - Water-diversion ditch - Google Patents

Abstract

WATER RELEASE CANA, containing a trench with a waterproof screen mounted in it on a support with a gap, o. In order to increase durability in permafrost soils, it is equipped with a waterproof material laid on the trench walls, a hydrophilic material located on the inner surface of the screen, with the upper edge of the hydrophilic material located in the specified gap, the lower edge at the bottom of the screen, and between the side walls of the screen and the trench installed stops.

Description

The invention relates to transport construction and is intended to intercept and divert permafrost and surface waters from engineering structures (roads and railways, runways of airfields) in permafrost regions. . The purpose of the invention is to increase the durability of the ditch in permafrost soils. The drawing shows a drainage ditch, transverse section. The drainage ditch in permafrost soil 1 contains a trench 2 installed in it on supports 3 with a gap of 4 4; a waterproof screen 5 made in the form of trench 2. The walls and bottom of trench 2 are reinforced with end-proof material 6. The inner surface of the screen 5 contains hydrophilic material 7, upper edge 8 of which is inserted into the gap 4, and the lower edge is located on the non-screen 5. There are stops 9 between the side walls of the screen 5 and the trench 2. The device works as follows. In the warm period of the first year of operation, the cold permafrost waters formed due to the thawing of the permafrost soil layer flow from the uphill side to the ditch, flow into the gap D between, screen 5, bottom and trench walls Filling the gap, part of the frostbite Water wets the upper edge 822 8 of the hydrophilic material 7 and due to capillary lifting forces and gravitational forces it moistens the side walls of the screen 5. Due to the heat of solar radiation and convective heat exchange with air, the water evaporates actively overhealing - NOSTA hydrophilic material, the consequence of which is the cooling surface of the screen and suprapermafrost water in the gap 4. Cold water in the gap suprapermafrost 4 provide a slight thawing of the trench walls, reinforced material and limit the development of deformations thawed soils. During heavy rainfall, surface waters, a gap 4 in the mine, filled with cold permafrost waters, merge into a channel formed by a screen. In winter, the water in gap 4 turns into ice. In the warm period of the subsequent years of operation, the permafrost waters, overflowing the edge of the screen 5, wet the material 7 and drain it along the channel of the screen. The evaporation of water from the surface of the material 7 eliminates the thawing of ice in the gap 4 n and keeps the walls of the trench 2 in a frozen state. Increasing the durability of the drainage ditch allows to significantly reduce operating costs, bi, to eliminate the restriction of train speeds on the deformed parts of the earth bed.

Claims (1)

A WATER DRAINAGE CANVAS containing a trench with a waterproof screen mounted on it with a gap with a gap, characterized in that, in order to increase durability in permafrost soils, it is equipped with a waterproof material laid on the walls of the trench, a hydrophilic material located on the inner surface of the screen, moreover, the upper edge of the hydrophilic material is located in the specified gap, the lower edge is at the bottom of the screen, and stops are installed between the side walls of the screen and the trench. e 1184882 A