RU119353U1 - FLEXIBLE PROTECTIVE CONCRETE MAT FOR Rough SURFACES - Google Patents

Abstract

 A flexible protective concrete mat containing concrete blocks made in the form of double-sided truncated pyramids, interconnected in order and in rows with a clearance of ropes, characterized in that the blocks are made with a size ratio of 0.12≤L / H≤1.08 of their length L and height H, with H≥50 mm, the rope has a diameter of 13–24 mm, and crushed stone of a fraction of 5–20 mm is included in the concrete aggregate.

Description

The utility model relates to construction and can be used to attach underwater slopes, riverbanks and ponds, canal sides, repair ravines, as well as to protect pipelines when laying them through water areas, in road construction to equip roads, including to strengthen their slopes.

From the description of the invention according to the patent of the Russian Federation No. 23235474, a universal flexible protective concrete mat (GZBM) is known, containing concrete blocks interconnected in order and in rows by flexible cables. The blocks in the upper part are made in the form of rectangular parallelepipeds, and in the lower part - in the form of truncated pyramids.

A disadvantage of the known GBM is the weak strength of its blocks having, as shown in the drawing in the description of the patent No. 2225474, a relatively small thickness with a large block length. When laying the well-known GBM on rocky soil, brittle destruction (kink) of its blocks is possible.

GBZM is also known from the prior art according to the RF patent for utility model No. 112113, containing concrete blocks made in the form of bilateral truncated pyramids, mounted relative to each other with a gap and interconnected by a flexible element.

This GBM when laying it on uneven rocky soil also does not have sufficient strength and can be destroyed under the blows of various objects carried by the flow of water.

The most difficult conditions of work of GBM, laid on uneven rocky soil, for example along the bottom of a river bed, arise when part of the block is not pressed to the base and takes the form of a “bridge”. In this situation, the destruction of GBBM or its individual elements is possible, in particular, due to the impact of an object carried by the river (Fig. 1).

To ensure that the impact energy was not enough to damage the GBM block, it is necessary to increase the thickness of the block, however, increasing the thickness leads to the fact that GBVM on uneven rocky ground will strongly “sail” due to the influence of the water flow on the lower part of its blocks (figure 2) .

The closest set of essential features to this technical solution is the universal GBZM, known from the description of the utility model according to the patent of the Russian Federation No. 102014, containing concrete blocks interconnected by a monopolized rope, made in the form of bilateral truncated pyramids with a common rectangular base and with smaller vertices.

The famous GBM is characterized by the stability of its fastening on a clay surface. However, for its use on uneven rocky soil, preliminary surface preparation is required to ensure that the blocks adhere to the surface over the entire area of the lower part of the blocks, since the river often carries external objects (driftwood, logs, boulders, ice floes) that can impact GBVM and thereby destroy it. The process of destruction from impact by foreign objects proceeds differently, depending on the kinetic energy reserve of the impacting object, its strength, nature of the impact and other factors. The destruction of the concrete block GBZM can occur by compressing it or due to cracking.

The technical result, the achievement of which the present utility model is aimed at, is to increase the strength of the blocks of sandstone, designed to be placed on uneven rocky soil, without preliminary preparation of the protected surface, which greatly simplifies the installation of sandstone.

The specified technical result is achieved due to the fact that GBZM contains concrete blocks made in the form of bilateral truncated pyramids. Blocks are interconnected in order and in rows with a clearance of ropes. The blocks are made with a size ratio of 0.12≤L / H≤1.08 of their length L and height H, with H≥50 mm, the rope has a diameter of 13 ÷ 24 mm, and crushed stone of a fraction of 5 ÷ 20 mm is included in the concrete aggregate.

The utility model is illustrated by the following drawings.

Figure 1 and 2 shows the placement of the famous GBM on rocky soil, side view; figure 3 shows a longitudinal section of a fragment of the proposed technical solution.

GBZM contains concrete blocks 1 (figures 1 and 2). Concrete blocks 1 are made in the form of bilateral truncated regular or irregular pyramids 2 and 3, of the same or different height, with a size ratio of 0.12≤L / H≤1.08 of their length L and height H≥50 mm (figure 3). Concrete blocks 1, which are part of GBM, are interconnected in order and in rows with a gap of crossed flexible ropes 4, having a diameter of 13 ÷ 24 mm. Crushed stone of fraction 5 ÷ 20 mm is included in the aggregate of concrete.

The selected ratio of the length and height of the block characterizes the GBBM block, resistant to loads on the front part and fracture-resistant, having a thickness sufficient for this, but allowing the GBZM to have acceptable streamlining. In practice, the fulfillment of this condition often means reducing the length (width) of the block while maintaining its normal height (thickness). At the same time, the concrete block has optimal dimensions for resistance to the shock effect of external objects carried by the river, and ensures the stability of GBM under the influence of a water stream, eliminating the twisting effect.

The block height size, rope diameter and crushed stone fraction size are interconnected. A concrete block cannot be made thinner than 50 mm, since crushed stone of a fraction of 5 ÷ 20 mm will not be able to occupy the space strictly above and below the rope with a diameter of 13 ÷ 24 mm during concreting. If during the manufacture of GBM, crushed stone is not above and below the rope in the block, then along the line of passage of the rope the concrete block will be extremely fragile. This condition determines the minimum size of the block height and the maximum size of the diameter of the rope and fractions of crushed stone. However, the finer the crushed stone, the less durable the concrete that is obtained from it, which sets the minimum size of the crushed stone fraction. The value of the height of the block GZBM determined by calculations depending on the speed of the water flow and the angle of inclination of the frontal face of the block. The minimum rope diameter is due exclusively to the strength characteristics of commercially available ropes suitable for use in GBM.

Thus, the proposed GBM is able to reliably withstand numerous strokes of various objects carried by the water flow, as well as significant pressure forces of the water flow, counteracting twisting GBMS.

In the manufacture of GBM, the ropes 4 are laid in a mold, the mold is poured with a solution of crushed stone, thus monolithing the rope 4 in the block, while making the releases of the ropes 4 in the form of mounting loops.

Delivered to the place of installation GBS with a lifting mechanism is hooked onto the mounting loops, lifted and then smoothly spread out.

In the event of a collision with GBMS of various objects carried by the water flow, GBZM units withstand shock and pressure of the stream, effectively protecting the soil or other object.

Claims (1)

A flexible protective concrete mat containing concrete blocks made in the form of double-sided truncated pyramids, interconnected in order and in rows with a clearance of ropes, characterized in that the blocks are made with a size ratio of 0.12≤L / H≤1.08 of their length L and height H, with H≥50 mm, the rope has a diameter of 13–24 mm, and crushed stone of a fraction of 5–20 mm is included in the concrete aggregate.