RU221053U1 - Concrete block flexible concrete slab - Google Patents

Abstract

The utility model relates to the construction of engineering protection against the negative effects of water (hydraulic engineering). Concrete blocks 1 of adjacent GB-slabs are fastened together by a bolted connection of embedded parts 2 with holes protruding from the body of the concrete blocks 1. In this case, the part of the embedded part protruding from the concrete block is bent to an approximately perpendicular position relative to the base of the concrete block 4 and has holes in the shape of an oval or rectangle elongated along the base of the concrete block.

Description

The utility model relates to the design of a flexible concrete slab used in the construction of engineering protection of objects from the negative effects of water (hydraulic construction).

A flexible concrete slab (hereinafter referred to as GB-slab) is a set of concrete blocks connected to each other by a flexible connection (AC 251463), mainly by rope.

Flexible concrete pavement (hereinafter referred to as GB-coating) is a set of GB-slabs connected to each other in two groups of ways:

1st group of methods - by hooking a metal hook onto a rope in the gap between adjacent concrete blocks (patents No. 179991, 184206);

2nd group of methods - by using fastening units built into a concrete block (patents No. 151889, 153449, 156766).

The disadvantage of the structures from the first group of methods is the rubbing of the rope with a metal hook during the operation of the GB coating and, accordingly, the destruction of the connection between the concrete blocks.

The second group of methods involves the use of special equipment to fasten concrete blocks of adjacent GB slabs together: a welding machine or a hydraulic press.

The second group of methods includes a method for fastening concrete blocks of adjacent GB-slabs (patent No. 218352) with bolts using embedded parts embedded in the body of the concrete block, which have a hole for the bolt. During the construction process, one protruding part of the embedded part is superimposed on the protruding part of the embedded part of another GB-slab in a plane approximately parallel to the base of the concrete block so that the holes in the embedded parts are aligned. The specified utility model is the closest analogue (prototype). When using it, the fastening of concrete blocks of adjacent GB slabs is carried out without the use of special equipment.

However, when using the design according to patent No. 218352, a technical contradiction arises:

if the hole for the bolts is made with a relatively large diameter (significantly larger than the diameter of the bolt), then it is relatively easy to align the holes in the embedded parts and connect the concrete blocks of adjacent GB slabs to each other. However, in order to make relatively large holes, the size of the embedded parts must be increased. In this case, the distance between the GB plates increases significantly, which reduces the protective properties of the GB coating as a whole;

if the holes for the bolts are made almost equal to the diameter of the bolts, then the size of the embedded parts will be significantly reduced (accordingly, the distance between the concrete blocks of adjacent GB slabs will decrease). However, in this case it will be extremely difficult to align the holes of the superimposed embeds so that it would be possible to use a bolted connection.

The purpose of this utility model (the stated technical result) is to provide a bolted connection without a forced increase in the distance between the concrete blocks of adjacent GB slabs.

The declared technical result is achieved by transferring the holes for the bolts from the horizontal to the vertical plane of the embedded part. The essence of the utility model is illustrated in Fig. 1 and fig. 2.

The part of the embedded part 2 protruding beyond the concrete block 1 is bent upward to an approximately perpendicular position relative to the plane of the base 4 of the concrete block and the round hole in the embedded part is replaced with an oval 3 elongated along the base of the concrete block or a rectangle elongated along the base of the concrete block.

In the present utility model, a horizontally elongated oval is understood as a closed convex curve 3, in which two sides are approximately parallel to each other, and the other two sides are a semicircle.

An approximately perpendicular position of a part of an embedded part relative to the base of a concrete block is understood as such a position that allows a bolted connection to be made without superimposing one embedded part on another in a plane approximately parallel to the base of the concrete block.

The embedded part can be made of stainless steel or other material that does not corrode in water.

At the construction site, holes 3 in embedded parts laid on the planned surface of concrete blocks of adjacent GB slabs will be located at the same level 5. Accordingly, there is no significant vertical displacement of the holes relative to each other. The displacement of concrete blocks of adjacent GB slabs in the horizontal plane, observed in practice, in the presence of a hole in the form of a horizontally elongated oval 3, is not an obstacle to the use of a bolted connection. When tightening two embedded parts with a bolted connection, it is permissible to deviate the parts of the embedded parts protruding beyond the concrete block from the vertical position (displacement of the tightened parts of the embedded parts towards each other), as well as their bending, including along the axis of the hole or in another place.

Claims (3)

1. A concrete block of a flexible concrete slab, including an embedded part in its side part extending beyond the concrete block with a hole for a bolt, characterized in that the end part extending beyond the concrete block of the embedded part is bent upward relative to the plane of the base of the concrete block, and The hole for the bolt is located on the bent part and is made elongated along relative to the base of the concrete block. 2. Concrete block according to claim 1, characterized in that the hole is made in the shape of a rectangle. 3. Concrete block according to claim 1, characterized in that the embedded part is made of stainless steel or other material that does not corrode in water.

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