SU1446222A1 - Arrangement for securing canal slopes - Google Patents

Abstract

The invention relates to the field of hydraulic structures. The purpose of the invention is to increase counter-filtration reliability by eliminating filtration losses of water and ensuring the stability of slopes under conditions of rapid drawdown of the water level in the canal and backwater of groundwater. The canal fastening structure is a lining of concrete monolithic slabs 1 laid on under

Description

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FIG 2

The prepared sandy ground of the slope 2, with countersuchs in it with f-straining glasses, consists of tubular filters and impermeable tips. The tubular filter of the cup consists of a polyethylene pipe 3 with perforated holes 4 in the lower part of it, which is sheathed in front of the filter material 5, The cap 6 of the cup is a short polyethylene pipe with a plug 7 of sand-bitumen, a mixture of perguminous gasket 8, reducing friction. Stability and filtration density under conditions of rapid drawdown of the water level in the channel and backwater of groundwater is achieved due to the free exit of the plug under the action of the weighing pressure and the rapid flow of groundwater from under the plates through the holes of glasses protected by a filter. 2 Il.

The invention relates to hydraulic structures m5, in particular, to reclamation canals operating under conditions of a variable hydraulic regime and a changing hydrogeological environment.

The purpose of the invention is to increase counter-filter reliability by eliminating hydraulic losses of water and ensuring the stability of slopes under conditions of rapid drawdown of water levels from the channel and sub-ground water.

Fig. 1 shows a structural scheme for mounting a channel's slope; FIG. 2 shows the node I in FIG. 1.

The fastening design is a lining of concrete monolithic slabs 1, ulo; 5 of them on the sandy soil OTKOCS-2, with seeped filtration cups (node, I)

The design of the filtrate cup consists of two main parts of a tubular filter and an impermeable tip. The tubular filter is a polyethylose trz bu 3 with a perforation / into the bottom 4; sheathed with filter nonwoven sikteticesh w material type 5 dornit or glass fiber 1 anga. On the upper part of the pipe, the dey.deva.ets tip 6 1-13 polkztilenovoy tr wiped with cork 7 from the sandbag of the mixture (asphalt) 5 insulated from its inner part with a pergumin strip 8.

The fastening structure of the channel's slope works in the same way.

In the initial period of operation of the canal with the maxipropping level (Max. HC) and in the absence of groundwater under the lining (Low GWL), it must be waterproof and exclude water loss due to filtration from the canal. This is achieved by the fact that the filter openings of the glasses on the top of the tip 6 are hermetically sealed with impermeable asphalt.

Double plug 7.

one

In the subsequent period of operation

canal associated with raising the level of groundwater to its highest level (max. GWL), when the maximum filtration head weighing the lining is achieved with a rapid level drawdown and complete lack of water in the canal (), the fixture must ensure the overall and filtration stability of the groundwater. slope 2. This goal is achieved by the fact that under the action of the filtration head, the waterproofing plug 7 is automatically pushed out of the opening of the tip 6 of the cup and the groundwater quickly leaves the plates, through them into the channel, lowering the filter pressure diet. A free exit of the stopper from the tip 6 is provided by a pergamin gasket 8, which reduces its friction in the pipe. The arrangement of the holes 4 in the lower part of the pipe 3, which is buried beneath the lining in the protected ground of the slope 2, increases the surface of the water intake zone of the filter, increases the flow rate through the cup, provides a quick decrease in pressure on the facing of the plates 1. Subsequently, the filter

40

 ration glasses work in the usual

Claims (1)

filtration regime with minor losses or groundwater inflows into the canal. The filtration strength of the slope 2, the elimination of silting of glasses and the prevention of mechanical suffusion are provided by synthetic filters. Invention Formula Fastening the slopes of the canals, including monolithic concrete lining with incised filtering cups with tips and filter  Max. W hl. -. . .. . . y- -: - l :: ld: - - r characterized in that, in order to increase the protivofiltration reliability by eliminating filtration losses of water and ensuring the stability of slopes under conditions of rapid drawdown of the water level in the canal and the subsoil water, the tips of the glasses are provided with waterproofing plugs, and the glasses are perforated in the bottom parts recessed under the cladding, and sheathed synthetic permeable synthetic material. ) y J MPKcMrB ..7.Y  . . . . . . ; figl