RU1832142C - Sea-coast and river-bank protection arrangement - Google Patents

Abstract

Usage: in hydraulic engineering to protect the banks of rivers and seas from erosion. SUMMARY OF THE INVENTION: A shore protection device consists of blocks made downstream with inclined faces and provided with a longitudinal partition to form lateral blind openings. In the upper parts of the block there are lateral slots extending between converging inclined faces into lateral blind openings. The slanted faces of the walls of the blocks are made with a width exceeding the width of the opposite faces of the walls of the block. Under the inclined faces of the blocks, inclined ribs are installed on the flow ramp side, which form through inclined channels open to the sides with inclined faces. The edges and faces have an equal angle of inclination. 1 s.p. f-ly, 4 ill.

Description

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The invention relates to hydraulic engineering and is intended to protect the banks of rivers and seas from erosion.

The purpose of the invention is to increase work efficiency.

In Fig. 1, the device according to the invention is shown when performing inclined faces of a wall already installed upstream. than the walls from the side of its running, side view; figure 2 is the same. top view: in Fig.Z - the same, when located on the lateral faces x of the longitudinal plate of inclined ribs, side view; figure 4 is a section aa in fig.Z.

The shore protection device includes blocks 1 located in the stream 2 and mounted on the base 3. The inclined faces of the walls 4 are already made of inclined walls 5, for example, to the width of the longitudinal plate 7. In this embodiment, the most reliable operation of the structure is ensured, since in the case of floating solids and debris in the stream, they are allowed to pass through the structure without disturbing its operation mode. At the same time, making the faces of the walls opposing the frontal narrower allows improving the speed regime in the bottom layer of the stream immediately behind the ascending eddy currents forming under the frontal inclined face, which reduces the dynamic speed load of the stream directly to the base 3 in the alignment site of the structure. thereby ensuring its more safe operation when changing the hydraulic parameters of the flow incident on it. This design is especially suitable for conditions when, when passing through floods, a large amount of tree-shrubbery and other vegetation, which; oo K

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If there is a wide wall from the downstream side of the structure, it could accumulate on it, which would lead to a change and deterioration of the entire mode of operation of the structure.

In order to improve the quality of the protective process and improve the operational characteristics of the structure, inclined ribs 8 are formed on the lateral faces of the plate 7 under the inclined faces of the frontal wall 5, which form the through lateral inclined channels 9. The structure is operated as follows.

The flow 2 at the edge of the walls 5 is partially wrapped and converted into primary ascending vortex flows 10 passing through the channels 9. Due to the fact that the channels are bounded below by the ribs 8, a powerful formation of the vortex flow with a large output gradient of longitudinal velocity occurs, which provides large penetrations of the ascending vortex into the flow parts flowing over the structure and, accordingly, thereby providing a more active implementation of the protective process. The remaining part of the flow, which is not trapped in inclined channels, is twisted under inclined ribs 8 and converted into secondary ascending eddy flows 11, which ensures further energy absorption and redistribution of the bottom parts of the flow in the device alignment. At the same time, such an implementation

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design improves its performance, because a double vortex layer arises behind the structure in depth of the stream, which contributes to a more complete operation of the device in difficult hydraulic conditions, for example, when there is a large oblique approach to it or in the case of a large amount of suspended sediment and solid runoff sediment flowing in the stream.

FORMULA AND SECTION

Claims (2)

1. A coastal protection device consisting of blocks made downstream with inclined faces and provided with a longitudinal partition to form lateral blind openings, while in the upper part of the blocks there are lateral slots passing between converging inclined faces into lateral blind openings, characterized in that, in order to increase operational efficiency, the oblique flow faces of the walls of the blocks are made wider than the width of the opposite faces of the walls of the blocks. 2. The device according to claim 1. characterized in that the inclined ribs are installed under the inclined faces of the blocks on the flow inlet side, forming through the inclined sides open with lateral sides and through inclined channels, while the ribs and faces have the same inclination direction. / figure 1 Fig 2 fi & 4