RU2317369C1 - Method for river bank consolidation - Google Patents

Abstract

FIELD: hydraulic shore-protective structures to be erected in erodible river beds, canals and other structures during accident recovery works.

SUBSTANCE: method involves digging-out trench having triangular cross-section directed so that triangle apex faces downwards; laying anti-suffusion device on trench side opposite to erodible river bank; assembling slope consolidation means including gabion mats on the anti-suffusion device; assembling flexible apron connected to slope consolidation means on opposite river bank. As river bank section adjoining slope is washed-out apron moves downwards and bank slope is consolidated by means of slope consolidation device.

EFFECT: increased operational capacity in flowing water, improved efficiency and river bank protection against erosion, extended service life of shore-protective structure and decreased costs of structure erection.

4 dwg

Description

The invention relates to hydraulic engineering and can be used as shore protection structures in eroded riverbeds, canals and other structures during emergency recovery work, as well as during capital construction in difficult conditions.

There is a method of erecting a gabion mount [1], in which gabion mattresses made in advance are laid on the prepared base, and, bonded together, form a flexible slant mount.

The disadvantages of this technical solution are:

- inefficiency of use during emergency recovery operations;

- the design and method of construction is quite complicated;

- relative complexity of installation.

The closest technical solution is the method of fastening the banks of the river [2], which includes a trench along the line of the proposed erosion of the bank into which the stone is poured, and as the bank erodes, the process of fixing the slope takes place. The disadvantages of this technical solution are:

- inefficiency of use during emergency recovery work on rivers with high speeds;

- economically, it is not a favorable technical solution due to the need for a large amount of stone and a short service life on rivers with high speeds.

The purpose of the invention is to increase productivity in accidents and work in flowing water, the effectiveness and reliability of protecting the banks of riverbeds and canals from erosion and durability of the shore protection structure.

This goal is achieved by the fact that near the eroded coast along the line of the expected erosion is an excerpt of the trench (figure 1). The cross section of the trench in this case has a triangular shape with the top oriented down. On the slope opposite from the washed away shore, an anti-suffusion device is laid on which a slant mount is assembled from prefabricated gabion mattresses (Fig. 2). At the same time, the anti-suffusion device serves as a means of protection from undermining the soil from under the sloping fastening, and geotextiles can be used as material. On the other slope, a flexible “apron” is assembled from prefabricated gabion mattresses, attached to the slant mount. Prefabricated gabion mattresses (figure 3) are procured in advance and are connected to each other, during assembly, connecting wire. As a result of erosion of the adjacent part of the coast to the slope, the “apron” sinks down and the coast becomes a fortified gabion slope mount.

Figure 1 shows a cross section of a workflow of a method for fixing riverbanks, a general view; figure 2 is a transverse section of a fortified river bank after washing and lowering the "apron", a General view; figure 3 - gabion mattress, axonometry; figure 4 - node a in figure 2.

Near the eroded shore 1 is an excerpt of the trench 2 having a triangular cross-section. An anti-suffusion device 4 is laid on the slope 3, on which the slope fastener 5 is assembled. On the opposite slope 6, a flexible apron 7 is assembled. The slant fastener 5 and the “apron” 7 are assembled from gabion mattresses 8.

The method of fastening the riverbank is carried out and works as follows. Near the eroded shore 1 along the line of the expected erosion, an excerpt of the trench 2 is made (Fig. 1). The cross section of the trench 2 in this case has a triangular shape with a vertex oriented downward. On the slope 3 opposite from the washed away shore, an anti-suffusion device 4 is laid on which a slant fastening 5 is assembled from prefabricated gabion mattresses 8 (Fig. 2). In this case, the anti-suffusion device 4 serves as a means of protection against soil washing out from under the sloping fastening 5, and geotextiles can be used as material. A flexible “apron” 7 is assembled on another slope 6 from prefabricated gabion mattresses 8, attached to the slant mount 5. Prefabricated gabion mattresses 8 (Fig. 3) are prepared in advance and are connected to each other, during assembly, by a connecting wire. As a result of erosion of the adjacent part of the shore 1 to the slope, the flexible “apron” 7 goes down and the shore becomes a reinforced gabion slope mount 5.

The proposed method of dealing with erosion of river banks is cheaper and more reliable in the work of known similar technical solutions. This method allows you to work in difficult, extreme conditions, when the water flow does not allow you to enter the water and the construction process is as complicated as possible. Moreover, the durability of these structures is 1.5-2 times greater.

Information sources

1. Patent of the Russian Federation No. 229651, MKI E02B 3/12. The method of erection of a gabion mount / Lamerdonov Z.G., Dyshekov A.Kh., Bekaldiev P.P., Shakhmurzov M.M .; application 01/08/2003; publ. 04/10/2005, bull. No. 10 (Analog).

2. Kryuchkov N.I., Mlynsky V.V. The method of fastening the banks of the Amu-Darya river // Hydrotechnics and land reclamation. - 1971. - No. 1. - S. 44-47 (Prototype).

Claims (1)

A method of securing riverbanks, including a passage of a trench, characterized in that, near a washable shore along the line of expected erosion, a passage of a trench having a triangular cross-section with a top oriented downward is produced, and an anti-suffusion device is laid on its slope opposite to the washable shore, on which they assemble a slant mount from gabion mattresses, and on its other slope they assemble a flexible apron attached to the slope mount.

Images