SU1514860A1 - Method of erecting earth dam on alluvia-covered rock bed - Google Patents

Abstract

FIELD OF THE INVENTION The invention relates to hydraulic engineering. The purpose of the invention is to reduce the duration of work and the labor intensity of construction without reducing the quality of the dam. The development of alluvial deposits at the base of the dam is carried out from under the water simultaneously with the construction of temporary culverts without creating a pit. The works are carried out alternately on each of the halves of the channel, leaving the other half free to let the river flow through. 1 il.

Description

 The invention relates to hydraulic construction and can be used in the construction of waterworks; fishing with alluvial bed dams on rocky ground covered with alluvial sediments.

The purpose of the invention is to reduce the duration of work and the labor intensity of construction without reducing the quality of the dam.

The drawing shows a section along the dam.

The method is carried out as follows.

First, preparation of the base - dam 1 - development of alluvial sediments 2 in the river bed, which are completely or partially in the form of tooth 3 are removed from under the water by dredgers or dragline excavators according to the technology adopted for the extraction of channel gravel-sandy rocks. mixtures, in the period before the overlap of the river bed. The development of underwater alluvial sediments is carried out simultaneously with the construction of temporary culverts alternately from each of the banks, leaving about half of the river bed free to allow its flow. The rocky base cleared of the main alluvial-sediment mass with the remaining small places (located across the stream) of the alluvial 4 forms a layer 5 of sandy soil (above water level 6) and through it up to the slopes of the tongue 7, which may be less than the height of the dam. Guaranteed to drive the tongue into the rock, it forms a reliable impervious diaphragm and prevents diffusion phenomena at the base of the dam. After driving the tongue, the erecting of the body of the dam 1 is completed by either washing up or filling the soil.

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With a small pressure or the absence of large filtration and dangerous diffusion effects in conjunction with the base of the dam, the sheet pile 7 may be excluded from the design.

Formula inventions

The method of erection of earth dam 10 on alluvial-covered rock foundation, including the creation of a pit for the construction of temporary culverts in the fenced part of the riverbed, the development of the all-15 vial sediments in the part not fenced by the lintels

groundwater feline in it, characterized in that, in order to reduce the duration of the work and the labor-intensiveness of the construction without reducing the quality of the dam, the development of alluvial deposits at the base of it is carried out simultaneously with the construction of temporary culverts from under the water alternately, first on one half not fenced the river bed, then the other, leaving half of the unshielded river bed free to let the river flow through, and the subsequent erection of the earth dam is made by washing up dumping.

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Claims (1)

Claim A method of erecting a dirt dam on an alluvium-covered rocky foundation, including creating a pit for erecting temporary culverts in a part of the channel protected by a bridge, developing alluvial-15 vial sediments in a part of the channel which is not protected by a bridge, and erecting soil in it, characterized in that, in order to reduce the duration of work and labor intensity of construction without reducing the quality of the dam, the development of alluvial deposits at its base is carried out simultaneously with the construction of alternating culverts from under the water alternately, first on one half of the riverbed not bridged by bridges, ’then on the other, leaving half of the unshielded riverbed free to pass the river’s expenses, and the subsequent erection of the soil dam is carried out by filling or dumping.