RU2457294C2 - Gabion foundation - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: gabion foundation includes steps. It comprises cylindrical gabions installed concentrically and forming a telescopic structure, so that the diameter of cylindrical gabions increases as they deepen, the net of the upper cylindrical gabions is anchored into the lower ones. Antifiltration device is provided under the lower cylindrical gabion. A tangent to angles of steps has a concave surface, which is arranged with gradual increase of a turn angle and is described by a given equation.

EFFECT: higher bearing capacity and efficiency of operation, reduced material intensity, higher environmental compatibility of a structure.

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Description

The invention relates to environmental construction and can be used as foundation supports in recreation areas or other places where it is difficult to deliver concrete.

Known shore protection structure [1], including cylindrical gabions for reinforcing supports. The disadvantages of this technical solution are:

- such a technical solution is not intended for use as a foundation;

- economically, it is not a favorable technical solution.

The closest technical solution is prefabricated concrete foundations having a stepped design [2], including prefabricated concrete elements. The disadvantages of this technical solution are:

- such a constructive solution is very laborious and difficult to apply on sandy soils, in recreation areas;

- economically, it is not a favorable technical solution.

The purpose of the invention is to increase the bearing capacity and work efficiency.

This goal is achieved by the fact that the foundation pit opens in the ground, in which the gabion foundation will be collected. In the pit, cylindrical gabions of a telescopic structure are assembled so that the diameter of each subsequent one is smaller than the previous one.

At the very bottom of the pit, a cylindrical gabion is made of wicker or other metal mesh, which will be the side surface. Above it is built the upper gabion, which anchors into the lower one and whose diameter is smaller than the lower one (Fig. 1). In this way, a gabion foundation having a telescopic structure is assembled. The thickness of the wire from which the braided or other mesh is made depends on the required durability and ranges from 4 to 8 mm. Cylindrical gabions have a height of each section and a diameter of 0.5 ÷ 1.0 and 0.1 ÷ 2.0 m, respectively. A woven metal or other mesh can be used as a mesh.

To reduce material consumption and uniformity of pressure transmission, the tangent to the corners of the steps has a concave surface, it is concave, and at the generatrix, the rotation angle to the end will gradually increase to the value α of the final rotation angle (Fig. 3). Consequently, the tangent of the angle of inclination of the tangent to the curve of the generatrix toward the end increases linearly

where K is the coefficient of proportionality; x, y - respectively, the abscissa and the ordinate of the curve generatrix in the Cartesian coordinate system; α is the final angle of rotation of the tangent to the curve of the generatrix, α <90 °; H is the depth of the water well.

Separating and integrating this equation, we obtain:

dy = Kxdx;

We find from the last equation the values of the coefficients C and K. Knowing that at the origin x = 0 and y = 0, we find C.

0 = 0 + C; C = 0.

Knowing that at the end of the curve, when x = L, where L is the projection of the step curve on the Ox axis, the angle of curvilinear fastening is α, and therefore

Отсюда

Thus, the equation of the curve in the Cartesian coordinate system has the form

From here

Bearing in mind the last formula, the equation of the curve in the Cartesian coordinate system can be rewritten as

где H - высота габионного фундамента.

where H is the height of the gabion foundation.

Figure 1 shows the gabion foundation; figure 2 is a section 1-1 in figure 1; figure 3 shows a tangent to the corners of the steps.

The gabion foundation 1 is constructed in the pit 2 by manufacturing cylindrical gabions 3 so that the grid 4 of the upper cylindrical gabions 3 is anchored into the stones 5 of the lower cylindrical gabions 3. An anti-filter device 6 is laid under the gabion foundation 1.

Gabion foundation is constructed and operates as follows. The foundation pit 2 is opened in the ground, in which the gabion foundation 1 will be assembled. In the pit 2, cylindrical gabions 3 of telescopic construction are assembled so that the diameter of each subsequent one is smaller than the previous one.

At the very bottom of the pit, a cylindrical gabion 3 is made of wicker or other metal mesh 4, which will be a side surface, by filling it with stone 5. An upper gabion is constructed above it, which anchors into the lower one and whose diameter is smaller than the lower one (Figs. 1, 2). Thus, the gabion foundation 1 having a telescopic structure is assembled. The thickness of the wire from which the woven or other mesh 4 is made depends on the required durability and ranges from 4 to 8 mm. Cylindrical gabions 3 have a height of each section and a diameter of 0.5 ÷ 1.0 and 0.1 ÷ 2.0 m, respectively. As a mesh 4, a woven metal or other mesh 4 can be used.

Gabion foundation 1 is most relevant for construction in fragile sandy and sandy loamy soils, in recreation areas. This design of the gabion foundation 1 has a large bearing capacity with a minimum consumption of building material. To prevent precipitation of the gabion foundation 1 caused by mechanical suffusion, an antifiltration device 6 is placed under it at the bottom of the pit 2.

To reduce material consumption and uniformity of pressure transmission, the tangent to the corners of the steps has a concave surface, it is concave, and at the generatrix, the rotation angle to the end will gradually increase to the value α of the final rotation angle (Fig. 3). Consequently, the tangent of the angle of inclination of the tangent to the curve of the generatrix toward the end increases linearly

where K is the coefficient of proportionality; x, y - respectively, the abscissa and the ordinate of the curve generatrix in the Cartesian coordinate system; α is the final angle of rotation of the tangent to the curve of the generatrix, α <90 °; H is the depth of the water well.

Separating and integrating this equation, we obtain the equation of the curve, in the Cartesian coordinate system it has the form

где Н - высота габионного фундамента.

where H is the height of the gabion foundation.

The proposed device, the gabion foundation is relevant during construction in fragile sandy and sandy loamy soils, in recreation areas. This design of a telescopic cylindrical gabion has a large bearing capacity with a minimum consumption of building material.

The proposed device is an environmentally friendly technical solution, and its effectiveness is 1.5-2 times more than analogues.

Information sources

1. Pat. No. 2270291 of the Russian Federation, IPC Е02В 3/12; Longitudinal through shore protection structure. / Z.G. Lamerdonov. Applicant and patent holder Z. G. Lamerdonov - No. 2004121109/03; application 07/09/2004; publ. 02/20/2006, Bull. No. 5. - 6 p. (analogue).

2. Engineering designs: Textbook. for ameliorator. specialist. universities / R.I. Bergen, Yu.M. Dukarsky, V. B. Semenov, F. V. Rass; Ed. R.I. Bergen. - 2nd ed., Revised. and add. - M .: Higher. school., 1989. - Page 349 (prototype).

Claims (4)

1. Gabion foundation, including steps, characterized in that it consists of cylindrical gabions installed concentrically and forming a telescopic structure, so that the diameter of the cylindrical gabions increases as they deepen, the mesh of the upper cylindrical gabions is anchored into the lower ones, an anti-filter device is provided under the lower cylindrical gabion, and the tangent to the corners of the steps has a concave surface, which is made with a gradual increase in the angle of rotation and is described by the equation

,
where H is the height of the gabion foundation; α is the final angle of rotation of the tangent to the curve of the generatrix, α <90 °. 2. The device according to claim 1, characterized in that the number of cylindrical gabions is two or more. 3. The device according to claim 1, characterized in that the cylindrical gabions have a length of each section and a diameter of 0.5 ÷ 1.0 and 0.1 ÷ 2.0 m, respectively. 4. The device according to claim 1, characterized in that a woven metal or other mesh can be used as a mesh.

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