RU1838496C - Prestressed reinforced-concrete slab of sectional airfield of road pavements - Google Patents

Abstract

SUMMARY OF THE INVENTION: in a prestressed reinforced concrete slab containing reinforcement located in the transverse direction and tensile reinforcement located in the longitudinal direction, the reinforcement is located in the transverse direction, grouped on sections of width a (2-4 ) tc is the distance between the middle of adjacent sections b (7-20) t, where a is the width of the section, t is the thickness of the slab, b is the distance between the middle of the adjacent sections. 4 ill.

Description

The invention relates to the field of construction and relates to the construction of prestressed reinforced concrete slabs of prefabricated airfield or road surfaces, as well as the coverings of sites for various purposes.

The aim of the invention is to reduce the consumption of reinforcement and simplify the manufacturing technology of the plate while maintaining its bearing capacity.

The invention is illustrated by drawings, in which Figs. 1 and 2 show a general plan view of a prestressed reinforced concrete slab; in Fig.3 and 4 - section aa and bb in Fig.2.

Pre-stressed reinforced concrete slab precast aerodrome or

road surface consists of a concrete layer 1, tensile reinforcement 2 located in the longitudinal direction, reinforcement 3 located in the transverse direction.

The manufacture of the slab is as follows.

In the prepared mold, tensile reinforcement 2 is placed, tensioned and fixed in tension, located in the longitudinal direction in one or two levels along the thickness of the plate; install and fix in the design position reinforcement 3, located in the transverse direction at two levels along the thickness of the plate, grouping the reinforcement 3 on the edge and intermediate along the length of the plate sections of width a (2-4) t with a distance between

ate with

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the midpoints of adjacent sections b - (7-20) t; they are laid in a mold and the concrete mixture is compacted to form a concrete layer 1. After the concrete has set the required strength, the tensile reinforcement 2 is cut at the end faces of the slab, while transmitting the prestressing force from the tensile reinforcement 2 to the hardened concrete layer 1.

Example. A preliminary concrete reinforced concrete slab of a prefabricated airfield or road surface, 14 m thick, is reinforced at two levels along the slab thickness:

in the longitudinal direction — for example, with rod reinforcement of a periodic profile of 0 14 mm of class A-IV in the amount of 10 rods;

in the transverse direction: at the edge sections with a width of 4 m (, 86 g) by rod fittings of the periodic profile 08 mm of class A-III in the amount of 6 rods in each section; in three intermediate sections along the length of the slab, 4 m wide (, 86 t) - coldness with chilled wire 0 5

mm of class BP-1 in the amount of 5 rods in each section. The distance between the midpoints of adjacent sections is 4 m (L-10-t). The steel saving for reinforcement is 2.1 kg per meter of slab.

Claims (1)

SUMMARY OF THE INVENTION A prestressed reinforced concrete slab of a prefabricated airfield or pavement containing tensile reinforcement located in the longitudinal direction at one or two levels in thickness of the plate and reinforcement located in the transverse direction at two levels in thickness of the plate, characterized in that that, in order to reduce the consumption of reinforcement and simplify the manufacturing technology of the plate while maintaining its bearing capacity, the reinforcement located in the transverse direction is grouped on the edge and in between intramural sections along the length of the plate width and the (2-4) t with the distance between the midpoints of adjacent lands L (7-20) t, where a - portion of the width, t - thickness of plate, b - the distance between the midpoints of adjacent lands. L. 4/ about/ si & Fairy. L AT $ ig