SU829770A1 - Method of constructing a dam of locally available materials - Google Patents

Description

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The invention relates to hydrotechnical construction, in particular, to methods for constructing dams from local materials in severe climatic conditions if there is ice in the river.

There is a known method of constructing dams from local materials by preliminarily blocking the floor with a banquet followed by dumping the body of the dam 1

The disadvantage of this method is that its use is possible only in the absence of ice in the river.

The closest to the invention according to the technical solution is a method of constructing dams from local materials, including closing the channel with a banquet to form an aperture and erect part of the dam 2.

The disadvantage of this method is that it can be used. only in the absence of ice in the river that

necessitates an earlier crossing of the river bed, and, consequently, an earlier cessation of navigation. In addition, the ingress of ice into the body of the dam reduces its reliability.

The purpose of the invention is to increase the reliability of the dam, by preventing ice from falling into its body.

The goal is achieved by overlapping the wound with a filtering structure located upstream, and after removing the ice behind it, the closing part of the dam is erected, and a dam of filtering material can be used as a filtering structure.

FIG. 1 shows the organization of the construction of the dam; fig, banquet, section; in fig. 3 filter dam, cross section.

The method is carried out as follows.

From the coast (or both banks), a banquet 1 is poured from unweakable material, and a dam 2 is erected in parallel. Moreover, it is washed in (or poured out) with some lag,. , ensuring the construction of the dam without the removal of the soil above the permissible limits. After the start of ice formation and reaching the amount of ice in the dam above the permissible limits, dumping of the downstairs banquet 1 is stopped and the final closing of the channel is carried out by erecting a dam 3 of water-filtering material, such as stone.

Due to the fact that the prism is capable of filtering water, a Flow t occurs below it. This flow from the tank, in the zone of which the closing section of the channel dam is erected between banquet 1, dam 3 and the ends of the washed parts of the dam 2, ice 5 is carried out 8 ni) pool. When insufficiency of the transporting ability of the filtration flow increases its flow rate by laying in the dam pipe 6, oriented to the direction of flow. In this case, the pipes are laid in such a way that their inlet opening 7 is separated from the dam slope of the dam in% by layer of material. The purpose of this layer is to delay ler 8 in the upstream, i.e. above the dam.

To eliminate the filling of the pipe with the material of the dike in the area adjacent to the inlet of the pipe, install a grid or filter.

After the removal of ice by the seepage flow, the junction is closed and the dam is erected in the closing section.

Technical and economic effect of the invention implementation more than 1 million rubles. obtained by stopping shipping later, as well as by ensuring the required quality of the structure.

Claims (2)

1. A method of constructing dams from local materials in harsh climatic conditions, including overlapping a channel with a banquet, forming a hole and building a part of the dam, characterized in that, in order to increase the reliability of the dam by preventing ice from entering the body, upstream filtering, and after removing the ice behind it, the closing part of the dam is erected, 2. A method according to claim 1, characterized in that a dam of filter material is used as the filtering structure. : Sources of information taken into account in the examination 1.Volzhsk hydroelectric station HHP Congress of the CPSU, v.2. 1969, fig. 1U-35. 2.Nikolaev, Yu.G., et al. Passage of river discharge during the construction of waterworks, 19b9, Co 49. ABOUT .g ig.Z