SU1423661A1 - Road paving - Google Patents

Abstract

The invention relates to road construction and is intended for the construction of roads with insulating layers of water-retaining moisture-saturated materials that prevent the freezing of the underlying soil of the earth bed in areas of deep seasonal freezing. The purpose of the invention / t (-: -SH KSh. NIN is to increase the durability and performance of the pavement during seasonal changes in temperature. The pavement contains base 1 laid on the soil of the roadbed in the form of a heat insulating structure made of water-retaining material 2, for example peat of high humidity, in a hard shell 3, which is formed from horizontal plates 6 connected by ribs 7 to form evenly spaced cells 8. Leveling layer 4 and coating layer 5 are laid on the base. On top plate 6 the bases are laid leveling layer 4 and the layer of the coating 5. The cell has a water-retaining material 2 and the lower edge of the upper plate 6 has an air gap of .9, which is 0.1-0.15 cell volume, for free expansion of the water-retaining material during freezing water contained in it 3 or 4 (L / S

Description

The invention relates to road construction and is intended for the construction of roads with insulating layers of water-retaining moisture-sensitive materials that prevent the underlying soil from freezing in the areas of deep seasonal freezing, and can also be used in road pavement above the underground communications when they are shallow. bedding.

The purpose of the invention is to increase the durability and operational characteristics of the pavement during seasonal temperature changes.

Figure 1 shows road clothes with a thermally insulated structure at the base, a vertical section; nl fig. 2 - placement of cells in thermal insulation design, plan; in fig. 3 - road construction, the hard shell of which is made using U-shaped plates, vertical section.

The pavement contains consistently laid on the ground of the groundbed 1 the pavement base in the form of a thermal insulating structure made of nododerzhivayuschego material 2 in the shell 3, leveling layer A and the coating layer 5. The hard shell 3 of the thermal insulating structure is made of plates 6 connected by ribs 7 with the formation of evenly spaced cells 8.

Between the water retaining material 2 and the lower face of the upper plate 6 there is an air gap 9 of 0.1-0.15 cell volume.

The bottom plate 6 can be made of concrete or formed in place of soil or stone material,

tent cement.

Vertical edges can be combined into rectangular units 10 (figure 2) or combined with upper horizontal elements, for this purpose U-shaped elements 11 can be used.

For example, peat of high moisture is used as a water-retaining material.

The thermal insulation structure is manufactured in the following manner.

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five

0 5

0 5

0

five

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On the assembled or manufactured on the bottom plate 6 stack water-holding material 5. Then install vertical ribs 8 with the top plate 7 on it and immerse it in the water-holding material before their installation on the bottom plate 6.

The amount of water-holding material is determined based on the requirements of frost protection,

In the autumn-winter period, the thermal insulation with high-moisture peat, for example, significantly reduces the speed and depth of frost penetration, and consequently, the swelling of the soil of the landbed, since the heat released during the phase transition of water containing peat, equal to 335 kJ / kg, compensates for the cooling of the soil.

Claims (1)

The presence of an air gap of 0.1-0.15 of the inner volume of the shell allows the water-retaining material to freely increase in volume when the water contained in it turns into ice. During the summer period, the thermal insulating structure does not prevent the heat flux from penetrating the surface of the coating into the embankment; because of the heat, there is no accumulation of heat in the coating and its temperature. This prevents shear deformations, rutting, and a decrease in the elastic modulus in the asphalt concrete pavement, i.e. ensures evenness and durability of the coating. Invention Formula Road pavement, which includes a pavement base in the form of a heat insulating structure made of water-retaining material in a shell, successively laid on the ground of the earth bed, leveling layer and layers of the coating, so that, in order to ensure durability and the performance characteristics of the pavement when seasonal temperature changes, the shell is made of rigid slabs connected by ribs with the formation of evenly spaced cells, and the volume of water-holding material is 0.85-0.90 cells .