SU1446217A1 - Protective coating for slopes - Google Patents

Description

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The invention relates to the construction and operation of railways and highways and can be used to freeze the slopes of the hydraulic bed and other structures erected under permafrost conditions.

The purpose of the invention is to stabilize the temperature of its mode of the edema sheet with seasonal changes in ambient air temperature and a decrease in the material intensity of the coating.

FIG. 1 shows a mound with a protective coating laid on the slopes, a cross-section; in fig. 2 - a protective coating of slopes, top view; in fig. 3 - slope protective coating plate; in fig. 4 is a section A-A in FIG. 3; in fig. 5 is a section BB in FIG. 3

The sheeting of slopes 1 embankment 2 includes a gravelly preparation 3, an apron 4 in the form of a stone prism, which ensures a stable position of the reinforced concrete bar 5 for the stop of reinforced concrete slabs 6 of the coating, made in the shape of a dome 7, provided at the ends with channels 8, which are covered from the side 9 of the earth bed with a screen 10 of woven material protected by soil powder 11. The spacer ring 12 of reinforced concrete slabs 6 is reinforced with an annular reinforcing bar 13, to which in the corners of reinforced concrete slabs 6 with curved ends 14 Anchor rods 15 are connected, the ends of which serve for the articulation of the plates 6 between themselves in windows 16, which are homonolable with concrete.

The sheeting of the slopes is as follows.

Upon the occurrence of negative temperatures, the surface of the concrete slabs 6 receives the temperature of the circulating medium, and varies depending on the position of the slabs 6 in height of the slope 1. Due to the uneven temperature of the floor, as well as cold air through the side slots between the dome-shaped slabs 6, convection heat exchange occurs, those. the process of heat transfer by air during natural (free) convection due to convective heat transfer at the border of separation of the gravelly carrier heat carrier — air, air — concrete 6.

Thus, in the winter time will be; freezing of the gravity preparation 3 and the whole body of the embankment 2 go. With the onset of positive temperatures, the temperature field of the plates 6 strengthening the slopes 1 will be positive, therefore, the reverse process of heat transfer from the plates 6 to the gravel granular preparation 3 is observed, but this process is less - intensive by lowering the temperature at night. Consequently, in the body of embankment 2, a frozen draw will form and its position will be stable.

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Claims (1)

PROTECTIVE COVERING OF SLOPES, mainly of the subgrade, of structures constructed under permafrost conditions, including precast reinforced concrete slabs interconnected in the corners, a reverse filter in the form of a granular layer, distinguished by the fact that, in order to stabilize the temperature regime of the slope during seasonal changes in ambient temperature and lower material consumption of the coating, reinforced concrete slabs from the side of the inverse filter are made in the form of a dome with side channels at the ends of the slabs, while the slabs with g the sides of the subgrade edge are covered by a screen protected by soil powder.