RU149710U1 - THIN FLEXIBLE CONCRETE MAT - Google Patents

Abstract

A thin flexible concrete mat containing a set of concrete blocks with inclined side faces connected in a checkerboard pattern into a single canvas with a monolithic rope, characterized in that the rope is artificial or synthetic.

Description

The utility model relates to hydraulic engineering construction and can be used to protect against the damaging effects of water flows on natural objects (banks of water bodies, water courses, etc.) and construction objects (underwater crossings of pipelines, bridge supports, dams, dams, etc.).

In general, Flexible Concrete Mat (GBM) is a set of concrete blocks with inclined side faces interconnected by a flexible connection (AC 251463). Thus, in general, GBM is a structure containing the following essential features:

1. Concrete blocks - ensure the safety of the protected object;

2. Concrete blocks, consisting of two truncated rectangular pyramids, one-piece connected to each other along the plane of the larger base, which is the same for each of the truncated pyramids, provide GBM flexibility by tilting the side faces in the longitudinal and transverse directions.

3. A flexible connection made of monolithic in the body of each concrete block along the plane of the common base of the truncated pyramids of a rope, cable or other flexible rod element, - provides the connection of concrete blocks into a single structure.

The GBM on the protected surface is held (resists drift) due to its relative massiveness and the features of the lower surface of the concrete block, for example, the presence of bottom suction cups (patent RU No. 2129635) or increased roughness (patent RU No. 102014).

The main disadvantage of these designs is their massiveness: transportation of GBM from the place of production to the place of use, often exceeds the cost of GBM in the warehouse of the plant. A significant decrease in the thickness of the concrete block is prevented by the crosshairs of the rope inside the concrete block: the thickness of the concrete block cannot be less than twice the diameter of the rope.

The GBM massiveness problem was solved in the design according to RU Patent No. 142999, in which a parallel rope laying scheme was proposed: the rope passes through concrete blocks without forming intersections. Thus, the proposed design of the GBM allows you to bring the thickness of the mat to a size slightly larger than the diameter of the rope used. Thin GBM (hereinafter referred to as TBBM) excellently resists drift along the protected object, as it is located in the bottom layer of the watercourse, in which the flow is minimal or completely absent.

The main disadvantage of TGBM is poor flexibility in the direction perpendicular to the direction of laying the ropes, hereinafter referred to as the longitudinal direction.

The objective of this utility model (technical result) is to create a TBM with sufficient flexibility in the longitudinal direction.

A new (claimed) technical result is achieved by performing a flexible connection according to RF patent No. 142999 (prototype) from an artificial or synthetic rope monopolized into a concrete block (an artificial rope is understood to be a rope made of artificial materials, for example, viscose and others; a synthetic rope is understood a rope made of artificial materials, for example, polyamide, polyester, polypropylene, etc.).

The essence of the utility model is illustrated by graphic materials and consists in the following.

In FIG. Figure 1 shows the TBGB consisting of concrete blocks (position 1) connected by a monolithic rope (position 2) into a single web with the formation of cracks (position 3).

In FIG. Figure 2 shows a fragment of a TBGM of five blocks (two blocks in the foreground and three blocks in the background), curved in the longitudinal direction. In FIG. Figure 2 shows that the bending of the TBM is directly related to the simultaneous extension and bending of the rope along its axis (position 2). In the future, the simultaneous extension and bending of the rope along its axis will be called twisting. The arrows (position 4) show the direction of twisting of the rope. If the ability of the rope to twist is insufficient, then when bending TGBM in the longitudinal direction will be observed:

- or communication failure in the “rope-concrete” system (if significant effort is made);

- or the concrete blocks are sagging and will not come into contact with the surface to be protected (insufficient flexibility in the longitudinal direction).

In the well-known GBM constructions in which the connecting rope crossed, there was no requirement for curl on the rope: a combination of flexibility and tension. To ensure flexibility in the GBM, only the flexibility of the rope was enough.

In TGBM, the gap between adjacent concrete blocks (position 3) is a few millimeters, usually 3-6 mm. Unlike other ropes (for example, steel ropes), an artificial or synthetic rope in the gap between concrete blocks of a specified size is able to twist around its axis, providing flexibility TBM in the range of about 20-50 ° depending on the type of stranding.

Thus, the technical result is achieved by a combination of the following features of a utility model:

a) The restrictive signs characterizing the thin flexible concrete mat (generic term):

- Concrete blocks - ensure the safety of the object protected using the TBM;

- The slope of the side faces of the concrete block - providing flexibility TGBM in the longitudinal and transverse directions.

- Rope - connects concrete blocks in TGBM.

- The staggered arrangement of the blocks provides a decrease in the thickness of the TBBM without a significant loss of strength.

b) A distinctive feature aimed at achieving the claimed technical result:

- The use of artificial or synthetic rope, - provides flexibility TGBM in the longitudinal direction.

In the field, with the help of lifting devices, the TGBM is laid on an uneven surface, for example, on a gas main pipe. Under the influence of gravity, all concrete blocks will be tightly pressed to the surface of the pipe. Tight pressing will be carried out by twisting an artificial or synthetic rope along its axis.

Claims (1)

A thin flexible concrete mat containing a set of concrete blocks with inclined side faces connected in a checkerboard pattern into a single canvas with a monolithic rope, characterized in that the rope is artificial or synthetic.

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