SU1100359A1 - Shore-protecting spur - Google Patents

Abstract

SECURITY SHORE, including arrays with corridors formed in them, characterized in that, in order to increase energy quenching, it is equipped with vertical shields installed on the axis of rotation with the possibility of rotation by 90 ° & towards the shore, the shield has a pressure tank and a drain hole, and the axis of rotation is fixed in the walls of the corridors and is located between the center of gravity of the shield and the center of gravity of the tank at the level of the upper reach exceeding the upper edge of the shield.

Description

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The invention relates to hydraulic engineering, to hydraulic structures used to control rivers, protect river and sea shores, protect oil, gas and other pipelines laid in the submerged state, protect port, water intake and other facilities, in particular to devices like poluzaprud, dams, breakwaters, bank spurs.

A bank spur is known, consisting of arrays, each of which is made expanding towards the head of the spur, and the corridors between the arrays are made of constant section 1.

Also known is a shore spur, including arrays with corridors 2 formed in them.

The disadvantage of these spurs is that when a flood wave passes, the water flow overflows through the spur at elevated speeds, as well as with a drop in water levels in front of and behind the spur leading to a hydraulic jump, which impairs the efficiency of the structure in varying conditions flow of the water stream and its component - solid runoff.

The purpose of the invention is to increase the energy enrichment of the coastal protection shore.

The goal is achieved by the fact that the bank spur is provided with vertical shields mounted on the axis of rotation, which can be rotated 90 ° toward the coast, the shield has a pressure vessel and a drain hole, and the axis of rotation is fixed in the walls of the corridors and is located between the center of the shield body and center the capacity of the vessel at the level of the upper reach, which exceeds the upper face of the shield.

FIG. 1 shows a bank protection, a plan view; in fig. 2 is a sectional view in FIG. 1, with a vertical shield; in fig. 3 - the same, with a lying shield.

The shore spur consists of arrays 1 with corridors 2 formed in them. In the walls 3 of the corridors there are fixed rods 4, which are the axes on which the shields 5 are installed, on the pressure planes of which tanks 6 are made with drain holes 7. To fix the horizontal position of the shields 5 in the walls 3 of the corridors 2 are protrusions 8. The center and the through hole under the rod 4 is located above the center of gravity of the shield b and below the point c - the center of the body of water filling capacity 6, and the point d - application of the horizontal component of water pressure ve hnego headwater on the shield when the water level of the upstream ,, reaching the top face shield. Moreover, the sum of the moments of forces applied at the points of the whig, which overturn the slits, is greater than the moment of the force of gravity of the shield holding the shield vertically, when the water level is raised, the upper face of the shield is higher.

The vertical axis of the spur for its most efficient operation is perpendicular to the flow. The spur is installed below water level. The bottom of 9 corridors 2 is located above the bottom of the river, or flush

with the bottom of the river.

The protection spur works as follows.

At low water levels (see Fig. 2), the shields 5 under their own weight

0 occupy a vertical position overlapping corridors 2, and the flow in, s bypasses the body of the dam, or flows over the walls of 3 corridors 2 (at their top marks below the marks of the upper face of vertical shields 5) and in the leaks under the shields 5.

5 When the water level rises above the top of the shields 5, they are automatically opened: under the action of the horizontal component of the water pressure in the upstream and the weight of the water filling the tank 6 at the moment of opening, the shields 5 are horizontal and the spur starts to work at its reduced height with increased throughput (see Fig. 3). Thus, the redistribution of water masses at the installation site

spurs under more favorable conditions for the passage of water, overflowing flood waters through the spur in the corridors above the shields and the sediment drawn in by water in the corridors 2 below the shields 5, and in the downstream energy of the streams of streams passing over the shields 5,

0 extinguishes jets of streams passing under the shields, reducing the force effect of water on the bottom. In the downstream of the nip, a bottom vortex zone (drum) is formed with the direction of the bottom jets in the direction of the spur, which contributes to sediment deposition

its base and thereby increasing the stability of the arrays. Below the vortex zone, a region of reduced flow rates is formed, where nano-rush accumulation also occurs. The location of the bottom of the corridor 2 above the bottom of the channel stabilizes the hydraulic structure of the flow over time, reducing the erosion of the bottom of the lower pool.

During the flood recession, the water level in the downstream reaches the threshold of the openings 7 of the tanks 6 of the shields 5. The tanks 6 are emptied and the shields 5 are in a vertical position, crossing the corridor sections 2.

The top mark of the walls 3 of the corridors 2 may be less than or equal to the mark of the top Q face of the shields 5 in their closed position, or exceed the level of the upper edge of the shields 5 in their closed position, and may also be variable along the length of the spores.

The proposed design can be made of precast reinforced concrete 5 elements. In this case, the arrays can be hollow in the form of wells, which are filled with local materials to the level of the shields.

The use of such a design of spurs is possible for the regulation of liquid and solid runoff in the conditions of the rivers of the mountain-foothill zone with intensive movement of sediments.

The effectiveness of the proposed shore-side spur on the flow is higher than current, pile, sheet piling and other structures used in the present. The use of shields, the opening of which is carried out by raising water, possibly as

automatic shutters. Such a structure is effective in protecting oil pipelines and other pipelines laid along the bottom of the river, port and other structures on rivers, reservoirs and in the coastal zone of the seas, to accumulate sediment coming from the stretching sections of the river or transported along the sea coast, as well as in as a dam, a semi-pond, or a breakwater to protect the coast and facilities located in the zone of wind waves.

Claims (1)

WATERPROOF SPUR, including arrays with corridors formed in them, characterized in that, in order to increase energy suppression, it is equipped with vertical shields mounted on the axis of rotation with the possibility of rotation 90 ° towards the shore, and the shield has a pressure tank and a drain hole, and the axis of rotation is fixed in the walls of the corridors and is located between the center of gravity of the shield and the center of gravity of the tank at the level of the upper pool exceeding the upper face of the shield. pggk?