RU2090693C1 - Dam - Google Patents

Abstract

FIELD: hydraulic engineering, in particular, anchored dams; applicable in protection (reinforcement) of dam from increasing dynamic water head, dampening of hydraulic impact in tidal, sill and other dams. SUBSTANCE: dam includes rigid cofferdam and relief device located on the side of upper pool and made in form of flexible sheet with floats on the upper edge. Anchor links securing the relief device to river bottom are fastened to lower edge of sheet, and anchor links securing relief device to dam are fastened to upper edge of sheet and arranged over blocks. EFFECT: higher efficiency. 2 dwg

Description

 The invention relates to hydraulic engineering, in particular to anchor dams, and is intended to protect (strengthen the dam) from the increasing dynamic pressure of water, to mitigate the hydraulic shock in tidal, mudflow and other dams.

Known soft dam with flexible panels, held by cables, containing a shell, fixed by a system of connections along the longitudinal generators, a cavity is made under the shell, provided with a channel communicating with the lower pool and overlapping the cavity from above, as well as a valve with a free-wheeling reserve connected by a lever system with connections shell and tension device [1]
Known automatic device for tensioning the anchor rods of the dam depending on the water horizon in the upper pool. The construction includes a dam body, fixed from the downstream side by inclined rods of two parts, between which a floating vessel is fixed. The pushing of this tank in connection with the rise in the water level, respectively, pulls the anchor rods. This invention is taken as a prototype [2]
The disadvantage of these inventions is the inability to automatically adjust the hydrodynamic and hydrostatic pressure of the water on the dam and control its stress-strain state. The idea of protection (strengthening) is to collect and use part of the energy of the dynamic pressure by a special device with a flexible dam for organizing forces opposing the pressure in the dam.

 The purpose of the invention is the automatic regulation of the loads on the dam, depending on the sudden increase in hydrodynamic pressure and water level in the upper pool and the control of its stress-strain state of the dam.

 The goal is achieved in that the dam, comprising a rigid jumper installed across the channel and an unloading device located on the upstream side, attached to the bottom and jumper with anchor rods, is equipped with blocks mounted on the banks of the channel, and the unloading device is made in the form of a flexible panel with floats on the upper edge moreover, anchor rods fastening the unloading device to the bottom are attached to the bottom edge of the panel, and anchor rods fastening the unloading device to the dam are attached to the top s edge webs and spanned across blocks.

 In FIG. 1 shows a general view of the panel, in FIG. 2 type of dam in a perspective view.

 The invention includes a protected dam 1 and an unloading device mounted across the channel, made in the form of a flexible panel 2 with floats 3 on its upper edge. Anchor rods that attach the unloading device to the bottom of the river are attached to the lower edge of the cloth 2, and anchor rods that attach the unloading device to the dam 1 are attached by cables 4 to the upper edge of the cloth and thrown through blocks 5 fixed on the banks of the river channel.

 The device operates as follows.

 Under the influence of the hydrodynamic pressure of water, the unloading device, made in the form of a flexible cloth 2 and floats 3 on its upper edge, strains, pulls the rods 4 attached to the upper edge of the cloth, thrown through blocks 5 fixed on the banks of the channel, transmitting the tension force through the ropes 4 on the dam 1, directed against the movement of water and unloading the jumper. The flexible panel 2 of the unloading device is smaller in area, installed in front of the main dam 1 is held by floating floats 3 and cables 4, as the screen collects the energy of the hydrodynamic pressure, which pulls (prestresses) the body of the dam 1 towards the pressure, depending on the pressure, which happens automatically. Floating tanks 3, depending on the water level in the upper pool, due to the buoyancy force, automatically support a flexible dam, and can also stretch the anchor cables 4 in the dam, as provided in the prototype.

 The dimensions of a flexible dam, the diameters of cables, floating containers, anchoring of cables in a dam and the stress-strain state of a dam are determined by calculations.

 Feasibility study.

 The use of a dam equipped with blocks mounted on the banks of the channel, a unloading device made in the form of a flexible panel with floats on the upper edge, and the panel is attached with the lower ends to the bottom, and the upper ends to the dam through blocks fixed on the banks of the river, allows you to automatically adjust the hydrodynamic and hydrostatic pressure on the dam, control its stress-strain state, automatically adjusting the load on the dam, depending on the sudden increase in hydrodynamic -pressure or by increasing the hydrostatic pressure by slowly increasing the water level.

Claims (1)

 A dam including a rigid jumper installed across the channel and an unloading device located on the upstream side attached to the bottom and jumper with anchor rods, characterized in that it is equipped with blocks mounted on the banks of the channel, and the unloading device is made in the form of a flexible panel with floats on the upper edge moreover, anchor rods fixing the unloading device to the bottom are attached to the bottom edge of the panel, and anchor rods fixing the unloading device to the jumper are attached to the upper edge along baskets and thrown over the blocks.

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