RU2318096C1 - Method for slope erosion protection structure erection - Google Patents

Abstract

FIELD: environmental protection of territories, particularly to protect slopes and other objects against erosion.

SUBSTANCE: method involves covering slope with mesh grid to be unreeled from roll so that mesh grid cut edges are overlapped and connected with each other with the use of tie wire in overlapped zones; securing the formed mesh grid mat to slope with anchors. Before mesh grid fixation plant seeds are spread over slope ground. The plant seeds are covered with straw mat layer having thickness of 3-7 cm in water stream flow direction. Straw mats are overlapped so that upper straw mats cover 10-20 cm of lower ones to prevent water stream penetration therethrough.

EFFECT: increased capacity, efficiency and reliability, as well as extended service life.

3 dwg

Description

The invention relates to environmental management of territories and can be used as anti-erosion protection of slopes and other objects.

Known fascine cellular fastening [1], in which braided nets are laid on the prepared base and, fastened together, form a net carpet on which fascines are fixed and a flexible sloping fastening is formed.

The disadvantages of this technical solution are:

- relative high cost;

- the design and method of construction is quite complicated;

- relative complexity of installation.

The closest technical solution is a method of erecting a flexible sloping shore protection with a stream saturated with sediment [2], including a woven mesh that is coated by unwinding rolls with an overlap on each other and fastening them with a strapping wire at the place of overlap.

The disadvantages of this technical solution are:

- such a technical solution is inefficient to use as erosion protection of the slopes;

- economically, it is not a favorable technical solution.

The purpose of the invention is to increase the productivity, efficiency and reliability of the protection of slopes from water erosion and the durability of the structure.

This goal is achieved by the fact that the surface of the slope is sprinkled with seeds of plants with a developed root system. A layer of straw 3 ÷ 7 cm thick is laid on top of the seeds.

The thickness of the straw layer depends on the value of the runoff of the estimated supply. So, on slopes with frequent and prolonged rains, it is necessary to lay straw 7 cm thick, and on slopes with short-term rains 3 cm. The thickness of the laying layer also depends on the steepness and length of the slope. On steep and long slopes, the thickness of the straw laying layer can also reach 7 cm. The thickness of the straw laying layer can vary, so it can be 3 cm in the upper part of the slope, and up to 7 cm in the lower part, where the speeds and volumes of the runoff run off.

Straw provides the best flow of water flow, without absorbing it at the same time. To ensure the best runoff of the water flow with minimization of roughness, the straw is laid along the runoff in a dense layer, without gaps. A wicker net is laid on top of the straw layer by unwinding rolls with an overlap on each other and fastening them with a strapping wire at the place of overlap. As a material for making a woven mesh, it is better to use ordinary iron with a thickness of 2–3 mm, which will be lost after germination of plants as a result of metal corrosion. The formed net carpet made of woven mesh is anchored to the slope. To prevent runoff of the flow of the water stream, the straw is overlapped on the slope, while the overlying layers overlap the underlying ones by 10 ÷ 20 cm.

Figure 1 shows a diagram of a method of construction of erosion protection of the slopes, a General view; figure 2 - node a in figure 1; figure 3 is a General view of the method of construction of erosion protection of the slopes, axonometry.

The surface of slope 1 is sprinkled with seeds of 2 plants, on top of which a layer of straw 3 is laid. Along the drainage of the water stream, the laid straw is covered with a woven mesh 4 by unwinding rolls 5 with an overlap on each other. The formed net carpet with anchors 6 is fixed on the slope 1. In the place of overlap 7, woven nets 4 are fastened together by a strapping wire.

The method of construction of erosion protection of the slopes is carried out and works as follows. The surface of slope 1 is sprinkled with seeds of plants 2, on top of which a layer of straw 3 is laid along the drain of the water stream. The laid straw 3 is covered with a woven mesh 4 by unwinding the rolls 5 with an overlap of them and fastening them with a strapping wire at the place of the overlap 7. The formed net carpet with anchors 6 is fixed on slope 1. To prevent leakage of the water flow, the straw 2 overlaps, while the overlying layers cover the underlying layers by 10–20 cm. The straw 2 is laid in a continuous layer 3–7 cm thick. The flowing water stream partially leaks through a layer of straw and moisturizes the earth, which contributes to plant growth. The main part of the runoff flows down the surface of the erosion protection without erosion of the soil. Plants, growing, fasten slope 1 with their root system, and wicker mesh 4 and straw 3 gradually disappear as a result of corrosion and decomposition.

The proposed method for the construction of erosion protection of slopes is cheaper and more reliable in the work of known similar technical solutions. This method allows you to work in difficult, extreme conditions, on steep slopes, when the construction process is as complicated as possible. This is a very environmentally friendly technical solution and is cheaper than the known two or more times.

Information sources

1. Patent of the Russian Federation No. 2212497, MKI E02D 17/20, Fashenny cellular fastening / Lamerdonov Z.G; application 08/08/2001; publ. 09/20/2003, Bull. No. 26 (analogue).

2. Patent of the Russian Federation No. 2238369 C1, E02D 17/20, B3 / 12, Flexible sloping shore protection with flow saturated with sediment / Lamerdonov Z. G; application 04/08/2003; publ. 10/20/2004, Bull. No. 29 (prototype).

Claims (1)

A method of erecting the erosion protection of slopes, including covering it with a woven mesh by unwinding rolls with an overlap on each other and fastening them with a strapping wire and fixing the formed net carpet with anchors on the slope, characterized in that the seeds of the slope are sprinkled with plant seeds before fixing the net, on top of which a layer of straw is laid with a thickness of 3 to 7 cm along the drain of the water stream, while to prevent the flow of the stream from flowing in, the straw is overlapped , and the overlying layers cover the underlying by 10 ÷ 20 cm.

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