RU2579032C1 - Method of securing sloping anchorages of dam - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: invention relates to hydrotechnical and nature protection construction and can be used as anchors in emergency. Method of fixing bank fasteners dams includes wire anchor with tips. Wire anchor is hammered into soil on dam crest, and in places of bend under wire are laid concrete cylindrical units, wire is passed at joint and is fixed to bank attachment of dam.

EFFECT: technical result consists in improvement of efficiency and reliability of reinforcement Bank fasteners dams, reduced labour intensity and material consumption during work.

3 cl, 4 dwg

Description

The invention relates to hydraulic engineering and environmental construction and can be used as anchors in emergency situations.

A known method and device for installing anchors [1], characterized in that it includes laying an overlap woven mesh by unwinding the rolls with the long side across the direction of movement of the slope with fixing on the slope with anchors with conical tips.

The disadvantages of this technical solution are:

установка большого количества анкеров требует много времени, что достаточно дорого и недостаточно надежно;

the installation of a large number of anchors requires a lot of time, which is quite expensive and not reliable enough;

низкая эффективность и экономичность.

low efficiency and profitability.

The closest technical solution is a device for anchoring anti-landslide structures [2], which includes laying an overlap woven mesh by unwinding rolls with the long side across the direction of movement of the slope with fixing on the slope with anchors with rotary tips.

Disadvantages:

требуется большое количество анкеров;

a large number of anchors are required;

предполагаемое устройство часто анкеруется в водонасыщенный грунт.

The intended device is often anchored in water-saturated soil.

The aim of the invention is to increase the efficiency and reliability of strengthening the sloping fastenings of dams.

This goal is achieved by the fact that a sloping mount with an apron is placed on the upper slope of the dam. Usually, gabion or concrete is used as a slant mount. A wire anchor is clogged on the crest of the dam using well-known technologies. The wire anchor consists of a wire that is thrown through concrete cylindrical blocks that are laid in places of bending. The anchor is equipped with a conical or rotary tip. The wire anchor is driven in using the guide rod. After driving the wire anchor to the required depth, the guide rod is removed and the anchor remains in the ground. The rotary tip has two ends: the lower end is conical in shape and the upper end is in flat truncated shape. The upper truncated end of the rotary tip when pulling the wire turns it around and puts it in a perpendicular position relative to the wire. In places where the wire is bent, a concrete cylindrical block is laid under it. A guide fixture is provided on the concrete cylindrical block through which the wire passes. The upper part of the dam or ridge is in a dry state and the filtration flows do not reach the part of the soil into which the anchor is clogged. The reactive force that occurs when pulling out the anchor and holding the slant mount has a large shoulder and, therefore, a holding moment. It is known that the slope stability is estimated by the safety factor n, which is the ratio of the moment of forces holding M _beats to the moment of forces shifting M _shear relative to the center of the most dangerous sliding surface:

. $$n=\frac{M_{\mathrm{at}d}}{M_{\mathrm{from}d\mathrm{at}}}$$

.

In FIG. 1 shows a cross section of a dam with a sloping mount, fixed by wire anchors on the ridge, general view; in FIG. 2 - the same, top view; in FIG. 3 - wire anchor with a conical tip, axonometry; in FIG. 4 - wire anchor with a rotary tip, axonometry.

On the dam 1, the upper slope is strengthened by a sloping mount 2 with an apron 3. On the crest of the dam 4, a wire anchor 5, consisting of a wire 6, is thrown, which is thrown through a concrete cylindrical block 7 and has a conical tip 8 or a rotary tip 9. The rotary tip 9 has two ends : the lower end 10 of the conical shape and the upper end 11 with a flat truncated shape. On the concrete cylindrical block 7, a guide fastener 12 is provided, through which the wire 6 passes.

The method of securing the sloping fastenings of dams is as follows. On the dam 1, the upper slope is strengthened by a sloping fastening 2 with an apron 3. As a sloping fastening, any type of fastening can be: gabion or concrete. On the crest of the dam 4, a wire anchor 5, consisting of a wire 6, is thrown, which is thrown through a concrete cylindrical block 7 and has a conical tip 8 or a rotary tip 9. The wire anchor 5 is blocked using a guide rod. After driving the wire anchor 5 to the required depth, the guide rod is removed, and the anchor remains in the ground. The rotary tip 9 has two ends: the lower end 10 of the conical shape and the upper end 11 with a flat truncated shape. In places where the wire 6 is bent, a concrete cylindrical block 7 is laid under it. A guide fastener 12 is provided on the concrete cylindrical block 7, through which the wire 6 passes.

The proposed method of installing wire anchors can significantly increase the installation speed and reduce the cost of work to a minimum.

The proposed method is effectively used to strengthen the sloping fastenings of dams of large dams, where as a result of wave processes the sloping fastening slides down and effective fastening outside the water-saturated zone on the crest of the dam is required.

Information sources

1. Patent of the Russian Federation No. 2486317, IPC E02D 17/20. Wire anchor with a conical tip / Lamerdonov Z.G., Enaldieva M.A .; application 05/04/2011; publ. 06/27/2013 (analog).

2. Patent of the Russian Federation No. 2486316, IPC E02D 17/20. Device for anchoring anti-landslide structures / Lamerdonov Z.G., Enaldieva M.A .; application 05/04/2011; publ. 06/27/2013 (prototype).

Claims (3)

1. The method of securing the sloping fastenings of dams, including a wire anchor with lugs, characterized in that the wire anchor is clogged into the ground on the crest of the dam, and in the places of bending under the wire concrete cylindrical blocks are laid, the wire itself is passed under the fasteners and fixed to the slant fastening of the dam 2. The method according to p. 1, characterized in that the wire anchor is equipped with a conical tip 3. The method according to p. 1, characterized in that the wire anchor is equipped with a rotary tip.

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