SU1500721A1 - Method of producing canals in frozen dams - Google Patents

Description

The invention relates to hydraulic engineering. The purpose of the invention is to reduce material consumption, simplifying and reducing the 'construction time. Dam 1 from the frozen material is poured as follows. First, the first tier of the dam 1 is poured in the channel part of the strasra; with the pre-laying of drainage pipes 2 leaving one end

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into the future cavity 3 in its lower part, with the other end into the lower reach for the profile of the dam 1. The first tier consists of pouring frozen frozen soil 4, subscreen preparation 5 (frozen sandy soil), internal anti-filtration element 6, soil-cement bearing element 7, blocks 8 from the ice, laid in accordance with the configuration of the future cavity 3, the ground-cement bearing element 9 and the outer impervious element 6. Next, the second tier and other tiers are dumped until the dam is completely erected and the drainage pipes are turned off assassin The sequence of the element of the second tier and subsequent tiers is the same. During the construction of each tier, starting from the bottom, at the moment of laying the blocks 8 out of ice, the installation of sections of the main line for supplying the coolant is made. After the complete construction of the frozen dam, the coolant is supplied to the full-height lines and the blocks 8 are melted from the ice while pumping the generated water using the pump unit.

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The invention relates to hydraulic engineering and can be used in the construction of channels in the construction of belt-freezing frozen dams, for example, 5 cavities in a waterproofing element on the pressure face of the dam.

The purpose of the invention is to reduce material consumption, simplify and shorten the construction time. ten

Figure 1 shows schematically. a dam with its layered erection, разрез is a transverse section, in Fig. 2 - the construction scheme of the dam, view from the upstream side;

Let us consider the application of the proposed technology for making cavities in a waterproofing element on the pressure face of a frozen earth dam. 20

Dam 1 from the frozen material is poured as follows.

First, in the channel part of the alignment, the first tier of dam 1 is poured with pre-laying 25 drainage pipes 2, one end of which goes into the future cavity 3 of its lower part, the other end into the lower reach for the profile of dam 1. The first tier consists of pouring frozen soil 4, 30 screen preparation 5 (frozen sandy soil), an internal impervious element 6, a ground-cement bearing element 7, blocks 8 of ice, stacked in accordance with the configuration of the future. 3, the ground-cement bearing element 9 and the outer anti-filtration element 6. The laying of the first tier is carried out in the sequence described above. Next, the second tier and other tiers are filled up until the dam is completely constructed of the same elements as the 1st tier, with the exception of drainage pipes, with the 45 sequence of tier elements and subsequent tiers, the materials used in their construction are the same as in the 1st tier.

During the construction of each tier, starting from the bottom (first), when blocks 8 are laid out of ice, sections 10 of the line for supplying coolant 11 are installed. Line 10 is installed on the $$ surface of the bearing element 7 and adjoins the surface of the stacked blocks 8 of ice. As construction is erected, highway 10 builds up to the upper level of the cavity in the waterproofing element 12 on the upstream side of dam 1.

To ensure the rigidity of the bearing elements 7 and 9 and prevent the destruction of the outer layer of the waterproofing element 11 on the upper edge of the dam 1 from the hydrostatic pressure of water in the cavity 3 as the dam 1 is erected, the partition walls 13 are made of ground cement. Partitions 13 perform in the places of installation of blocks 8 of ice, forming in the subsequent rigid frame construction of the waterproofing element 12.

After the frozen dam is fully erected, the heat carrier 11 (hot water or steam) is supplied to the full-height lines 10 installed and the blocks 8 are melted from the ice while being pumped out simultaneously by means of a pump unit that forms water. In the lower part of the cavity 3, water formed during melting is diverted through drainage pipes 2, which later during operation perform the function of a main line for supplying coolant — cold air entering the cavity 3 of the waterproofing element 12 from the atmosphere. In the summer, in order to prevent the loss of cold air in the cavity 3 of the waterproofing element 12, pipes 2 are supplied with plugs from the downstream side of the dam 1 through pipes 2.

The process of melting ice from the cavity 3 is timed to the winter period in order that the charging of the cavity 3 with cold air takes place naturally, while the pipes 2 are freed from the plugs.

Claims (1)

Formula Fig. ethenia The method for making channels of frozen dams constructed by means of installation and sprinkling formwork elements with the body material of the dam, the configuration of which contributes to the channel configurations, which, in order to reduce material consumption, simplify and shorten the construction period, the formwork elements are prefabricated in blocks of ice set in the place of the channel with simultaneous_ust5 1500721 6 Novoki line for supplying coolant adjacent to the surface of the block, dumping the tier of the dam body, then the belt is repeated until the completion of the construction dams, increasing the main line to supply the coolant, after which the coolant is fed through the main line and ice is melted, and the formed Water is removed. \ FI.2 AZ 'ПДР * 0,' о ⁷ '-О * figs