RU2486316C2 - Device for anchoring of landslide protection structures - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: device for anchoring of landslide protection structures includes installation of a woven net with an overlap by means of unwinding of rolls with a long side across the direction of slope movement with fixation on the slope by means of anchors with tips. A wire anchor comprises a rotary thrust element, which occupies a perpendicular position in the working position relative to the wire attached to the landslide protection structure. The lower end of the thrust element has a conical shape, and the upper one - a flat and cut at the sharp angle relative to the axis of symmetry.

EFFECT: higher efficiency and reliability of operation of landslide protection structures on slopes, lower material intensity.

4 cl, 3 dwg

Description

The invention relates to the environmental arrangement of mountain and foothill landscapes and can be used as anchors for landslide structures.

A known method of construction of erosion protection of the slopes [1], including a coating of woven mesh, fixed with anchors on the slope. Under the net, straw is lapped with preliminary planting of seeds for plants. The disadvantages of this technical solution are:

- the design of the anchors is quite expensive and not reliable enough;

- low efficiency, if necessary, anchor to a great depth.

The closest technical solution is a method of erecting a flexible slope fastening [2], in which a flexible slant fastening is laid on the prepared base of the slope. A flexible sloping fastener consists of a woven mesh over which high-strength concrete is laid with lining with high-strength material. A flexible slope fastening is fixed on the slope of the dam in nodes with anchors with opening heads. The disadvantages of this technical solution are:

- the design and method of anchoring is quite complicated and expensive;

- low efficiency and reliability of the anchors.

The aim of the invention is to increase the efficiency and reliability of anti-landslide structures on the slopes.

This goal is achieved by the fact that on the slope prone to creep, an anti-landslide structure is being constructed. The landslide structure consists of a wicker net on which vegetation is planted. The root system of vegetation is fixed with a wicker net and soil on the slope, which provides a strong and solid grip. To strengthen the fastening of the landslide structure, the woven mesh is fixed on the slope with anchors. An anchor consists of a wire attached to a rotating thrust element. The lower end of the thrust element has a conical shape, and the upper end has a flat truncated shape. The optimal value of the angle of the upper end of 45 ° with respect to the axis of symmetry of the thrust element. Installation of the anchor is carried out using a rod driven into the soil to a great depth or inserted into a pre-drilled hole. For this, the rod abuts against a conical tip. After deepening the thrust element to the required depth, the rod is removed. Pulling the wire up, as a result of soil pressure on the truncated upper part, the thrust element begins to rotate and is brought into a perpendicular position relative to the wire. The wire is fixed and rotates around the axis in the middle, which will ensure its perpendicular position relative to it. A hole is provided in the thrust element for free rotation of the wire.

The axis of the anchor to the normal to the slope surface has a small deflection angle α, α = 5 ÷ 20 °, which will ensure the tensile operation of the fiber with possible mesh slipping. The penetration of the anchor into the soil below the surface depends on the thickness of the retained formation and varies from 0.5 ÷ 2.5 m.

The invention is illustrated by drawings, where Fig. 1 shows a cross section of a slope with an anchored anti-landslide structure, general view; figure 2 - rotating thrust element in the installation position, General view; figure 3 - rotating thrust element in the working position; figure 4 is a section 1-1 in figure 3.

The device includes a slope 1, fixed by a woven mesh 2, on which vegetation is planted 3. A woven mesh 2 is fixed on the slope by a wire 4. The wire 4 is attached to the thrust element 5, consisting of a truncated cylinder 6, the lower end 7 has a conical shape, and the upper end 8 is flat truncated shape. The wire 4 is fixed and rotates around axis 9. The anchor is installed using the rod 10. In the truncated cylinder 6, a hole 11 is provided for free rotation of the wire 4.

The device is constructed and operates as follows.

On the slope 1, prone to creep, an anti-landslide structure is being constructed (Fig. 1). The anti-landslide structure consists of wicker net 2, on which vegetation 3 is planted. The root system of vegetation 3 is fixed with wicker net 2 and soil on slope 1, which provides a strong and solid grip. To strengthen the fastening of the landslide structure, the woven mesh 2 is fixed on the slope with anchors. The anchor consists of a wire 4 attached to a rotating thrust element 5. The lower end 7 of the truncated cylinder 6 has a conical shape, and the upper end 8 is a flat truncated shape (figure 2). Installation of the anchor is carried out using a rod 10, driven into the soil to a great depth or inserted into a pre-drilled hole. To do this, the rod 10 abuts against the conical tip of the lower end 7 of the stop element 5. After deepening the stop element 5 to the required depth, the rod 10 is removed. Pulling the wire 4 up, as a result of soil pressure on the truncated upper part 8, the thrust element 5 begins to rotate around the axis 9 and is brought into a perpendicular position (Fig. 3) relative to the wire 5. The wire 5 is fixed and rotates around the axis 9 in the middle, which ensures a perpendicular his position is relative to her. In the thrust element 5 for free rotation of the wire 4 is provided (figure 4) hole 11.

The axis of installation of the anchor wire 4 to the normal to the slope surface 1 has a small deflection angle α, α = 5 ÷ 20 °, which will ensure the operation of the wire 4 in tension with the possible creep of the net 2. The burial of the thrust element 5 in the ground below the surface depends on the power of the retained formation and ranges from 0.5 ÷ 2.5 m.

The proposed device is more reliable in operation than the known similar technical solutions. Moreover, their cost is 1.5-2 times less, since the strength properties of metal anchors are used more efficiently.

Information sources

1. Patent of the Russian Federation No. 2318096, MKI E02D 17/20. The method of construction of erosion protection of the slopes. / Khashirova T.Yu .; application 05/16/2006; publ. 02/27/2008. Bull. No. 6 (Analog).

2. Patent of the Russian Federation No. 2238368, MKI E02D 17/20, EV 3/12. The method of erection of a flexible sloping mount. / Lamerdonov Z.G .; application 03/31/2003; publ. 10/20/2004. Bull. No. 29 (prototype).

Claims (4)

1. A device for anchoring anti-landslide structures, including lapping the braided mesh by unwinding the rolls with the long side across the direction of movement of the slope and securing them to the slope with anchors with tips, characterized in that the wire anchor has a rotating thrust element that takes a working position perpendicular to the wire, attached to the anti-landslide structure, the lower end of the thrust element is conical in shape and the upper end is flat truncated at an acute angle ohm about the axis of symmetry. 2. The device for anchoring anti-landslide structures according to claim 1, characterized in that the wire is fixed to the thrust element in the middle. 3. The device for anchoring anti-landslide structures according to claim 1, characterized in that the axis of the wire to the normal to the slope surface has a small deflection angle α, α = 5 ÷ 20 °. 4. The device for anchoring anti-landslide structures according to claim 1, characterized in that the deepening of the thrust element into the soil below the surface depends on the power of the retained formation and ranges from 0.5 ÷ 2.5 m

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