RU171948U1 - Flexible concrete slab joint in protective sheet - Google Patents

Abstract

The utility model relates to the field of construction. The flexible concrete slab connection unit with mounting loops contains concrete blocks, a pair of mounting loops and a connecting element passed through the loops. The loops are interconnected in areas from blocks to the connecting element. The load on the mounting loops of concrete slabs during the operation of their connection is distributed and reduced. 2 s.p. f-ly, 7 ill.

Description

The utility model relates to the field of construction, namely to universal protective concrete coatings. The main areas of application of the technical solution are: strengthening various hydraulic engineering facilities and engineering structures in order to protect them from erosion by water flows and from impacts carried by the flow of objects, including the protection and weighting of underwater pipelines; strengthening slopes of quarries and embankments to protect against soil erosion; the creation of temporary pavements protecting the underlying surface, intended, in particular, for the movement of heavy equipment on a caterpillar track.

The protective coating has a modular modular design and is a canvas made of flexible concrete slabs connected by connection nodes. Flexible concrete slabs contain sets of blocks connected in order and in rows with a clearance of reinforcing ropes.

From the patent document RU 112213 U1 of January 10, 2012, a knot for connecting flexible concrete slabs in a protective sheet with mounting loops is known, containing concrete blocks, a pair of mounting loops and a connecting element passed through these loops in the form of a rod clamp of a pile-anchor type. The known technical solution is characterized by simplicity, provides the ability to assemble the structure under water, allows for quick installation of the canvas, and also does not require the use of a special tool. However, under the significant static load encountered in practice, tearing the protective sheet, flexible plates sprawl and in the nodes of their connection, the main force is concentrated in the point contact region of the mounting loops with a relatively thin rod retainer. It is in these places that the loops can be damaged by clamps, followed by grinding and tearing of the loops, which leads to the destruction of the protective sheet.

The technical problem to be solved is the reduction of the load on the mounting loops in the area of contact with the connecting element in the connection node.

The technical result provided by this utility model is to distribute the load on the mounting loops with the connecting element in the junction of the flexible concrete slabs during the operation of the protective sheet and to reduce the point load on the loop ropes.

The technical result is achieved due to the fact that in the node for connecting flexible concrete slabs with mounting loops containing concrete blocks, mounting loops and a connecting element in which mounting loops are connected to the blocks of blocks and interconnected, the connecting element is passed through a common hole of the loops, the loops are twisted together moreover, their twisted parts cover the connecting element.

In the particular case, a pair of loops are twisted 3 to 7 times.

In another particular case, the connecting element is made integral in the form of a lever and a sleeve, with the possibility of their mutual axial movement. In this case, the lever is inserted into the sleeve, which is covered by the hinges.

The utility model is illustrated by the following drawings.

FIG. 1: junction of flexible concrete slabs with mounting loops.

FIG. 2: passing the rod through mating loops.

FIG. 3-6: loop twisting.

FIG. 7: composite connecting element.

The implementation of the utility model is shown in the following example of a structural embodiment of the device.

Depicted in FIG. 1 node connecting two flexible concrete slabs with mounting loops contains four concrete blocks 1 of bipyramidal shape, a pair of twisted mounting loops 2 and a rod 3 passed through conjugated loops 2. Two blocks and one loop belong to the first plate. The other two blocks and the corresponding loop belong to the second plate.

Blocks 1 are the working elements of the plates and the protective coating formed by them. Blocks 1 are cast from concrete and combined into a mesh single-layer structure with reinforcing ropes. The shape of the blocks 1 and the distance between adjacent blocks 1 are selected, including from the conditions for ensuring the mobility of the blocks 1 relative to each other and the minimum size of the gaps between them, to ensure the protection of the underlying surface. The surfaces of the presented bipyramidal blocks 1 from the upper and lower sides are made tapering asymmetrically in the direction from the central part of these blocks, and their bases are flat on both sides of the plate.

Reinforcing ropes are flexible and made of non-metallic synthetic material. At the stage of designing the protective coating, the diameter and flexibility of the ropes are selected based on the geometric characteristics of blocks 1 required during operation. Reinforcing ropes are monolithic in concrete blocks 1 in the manufacture of plates. The outlets of these ropes form mounting loops 2.

The rod 3 is made of metal, is solid or hollow and performs the function of a rigid connecting element.

To protect the underlying surface, concrete slabs are laid on it. At the same time, the first plate is moved to the installation site, lifting it by the mounting loops 2 with a crane. Then, in the same way, they are placed side by side with the first second plate, which is brought closer to the first plate and lowered so that the mounting loops 2 of the first and second plates are located as accurately as possible opposite each other, and the gaps between the blocks 1 of adjacent plates had the smallest possible value value. The loops 2 of one plate are laid on top of the loops of the adjacent plate with the formation of their common hole, sufficient to form a twist of the loops 2 using the rod 3.

Then, through the common hole of the combined loops 2, a rod 3 is passed, which is lowered from top to bottom (Fig. 2), without bringing its end to the underlying surface, so as not to limit subsequent movements of the rod 3 by engagement with it.

Then they begin to rotate the rod 3 in the longitudinal section of the loops 2, acting as a lever, towards one or the other plate so that the mounting loops 2 begin to twist with each other (Fig. 3). After the rod 3 has taken a horizontal position, it is pushed through the crosshairs of the loops 2, making translational movement along the axis of the rod 3 (Fig. 4) to the opposite extreme position. Then the rod 3 again act as a lever and raise it to a vertical position (Fig. 5). The spinning of the rod 3 is repeated mainly 3-7 times, tightly twisting the loops 2 between them to select the free sagging of the loops 2 and create their tension (Fig. 6).

As a result, the loops 2 are twisted together in sections of the ropes W from the blocks to the connecting element and form a twist of 4 loops 2, and their twisted parts cover the rod 3 from two sides. This twist is fixed to prevent its reverse spontaneous unwinding with the same rod 3 passing through the central part of the twist 4, pushing it horizontally through the crosshairs of the loops 2 back and resting the free end on the surface of concrete blocks 1 or in the reinforcing rope.

The rod 3, it is advisable to use together with the H-shaped sleeve 5 in the form, for example, short relative to the rod 3 of the tube, rolled on both sides with the formation of a collar at its edges. The sleeve 5 is made with the possibility of axial movement of the rod 3 inside it. The sleeve 5 is placed in the crosshairs of the loops 2, after which the rod 3 is inserted inside the sleeve 5 (Fig. 7). Further work on the formation of twisting 4 includes similar actions as with the action of one rod 3. Each time the sleeve 5 is rotated by the rod 3, it is moved inside this sleeve, which directly transfers the rotation to the ropes of the loops 2. At both ends of the rod 3, it is also advisable to carry out stops in the form of protrusions of its curved parts for engaging the ropes of the loops 2 and improving the reliability of the retention of the rod 3 in the twist 4.

The result is a node connecting flexible concrete slabs with mounting loops 2.

Due to the fact that the mounting loops are twisted together, and their twisted parts cover the connecting element, there is twisting between this element and the connection points of the loops with concrete blocks and the load applied to the plates does not lie on the ropes exclusively in the area of their contact with the connecting element, but more evenly distributed due to friction forces and elastic properties of the ropes along twisted mounting loops, weakening when approaching the location of the connecting element. Thus, the load distribution is achieved on mounting loops with a connecting element in the joint unit of flexible concrete slabs during the operation of the protective sheet, which leads to a reduction in the point load on the loop ropes.

It was experimentally established that the best results on load distribution are observed if a pair of loops are twisted 3 to 7 times. The use of the sleeve further reduces the mechanical load on the cables of the mounting loops in the twist due to its larger external diameter compared to the diameter of the rod, and therefore the larger contact spot that distributes the load on the mounting loops.

Claims (3)

1. The node connecting flexible concrete slabs with mounting loops, containing concrete blocks, mounting loops and a connecting element, in which the mounting loops are connected to the blocks of slabs and interconnected, the connecting element is passed through a common hole of the loops, characterized in that the loops are twisted together, moreover their twisted parts cover the connecting element. 2. The node according to claim 1, characterized in that the pair of loops is twisted from 3 to 7 times. 3. The node according to claim 1, characterized in that the connecting element is made integral in the form of a lever and a sleeve, with the possibility of their mutual axial movement, while the lever is inserted into the sleeve, which cover the loop.

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