RU110162U1 - PIPELINE TRANSITION UNDER THE ROAD - Google Patents

Abstract

 The transition of the pipeline under the highway, containing the pipeline, gravel-sand cushion, road surface, characterized in that the transition further comprises a cement-cement slab reinforced in the lower part with transverse and longitudinal rods and resting on the soil massif, while the length of the slab exceeds the width of the road surface by the value of the formation of the pyramid of punching from the extreme edges of the pavement to the thickness of the soil-cement slab, the width of the cross section of the soil-cement slab is equal to a triangle formed by lines connecting the edges of the base of the cement-cement slab and the outer surfaces of the pipeline at an angle not less than the angle of repose of sand laid on top of the pipeline.

Description

The utility model relates to the field of construction, and more specifically, to the construction and operation of pipelines of water supply and sewage systems crossing the soil mass under the highway.

One of the most important problems in the functioning of pipelines of water supply and sewerage systems passing under highways is the prevention of pipe damage that occurs under the influence of mechanical loads transmitted from automobiles through the layers of road surface and soil. The destruction of pipes located under the roads, makes it impossible to transport tap water or sewage. As a result, through the breaks, water flows into the ground, eroding the base under the roadway, followed by the destruction of the road in this place. In addition, spontaneous outflow of water through breaks represents water loss (if it is drinking) or environmental pollution (if the pipeline transports wastewater).

Known tray system for laying pipelines (Kuleshov VG Tray system for laying communications / RF patent for utility model No. 86605. E02D 29/045. 09/10/2009), consisting of their upper elements docked to each other and the lower ones docked to each other elements, while the upper elements are made in the form of trays, and the lower elements are made in the form of a reinforced concrete slab with elements for fixing the side walls of the tray from displacement.

The disadvantage of this technical solution is the possibility of groundwater penetrating through the joints between the elements and its freezing in the cavity of the tray system, which will lead to the destruction of the system by expanding ice and to the possibility of destruction of the roadway due to deformation of the soil prism.

Known transition pipeline under the highway (Valeev MM and others. The transition pipeline under the highway / RF Patent No. 2179277. F16L 1/028. 02/10/2002), consisting of a protective casing made in the form of a cylindrical shell with a seal annular space . Metal belts are installed below the cylindrical shell, the middle of which has a length equal to the width of the roadway.

The disadvantage of this technical solution is the need for an exhaust candle, which is not needed when laying water and sewer pipelines from which natural gas does not leak. In addition, when crossing water or sewer pipelines under highways, metal anchor belts, fixed at the bottom of the cylindrical shell, are deprived of technical necessity and are useless when laying water and sewer pipelines. In this regard, the specified technical solution cannot be used for the transition of water and sewer pipelines under roads.

The prototype of the proposed technical solution is the passage of the culvert under the highway (Lukin N.P., Lukin A.N., Schuko S.A. Roads. Pipes under embankments of roads. Overview. - M.: Central Scientific and Research Institute of Minavtodor of the RSFSR, 1988 Issue 6. - P.27. Fig. 18), consisting of a pipe, soil prism, gravel and sand cushion, roadbed.

This technical solution is designed to allow rain, melt and flood waters to pass under the road and cannot be used to cross water and sewer pipelines. According to the technical solution of the prototype, both openings of the culvert are located above the surface of the earth, while water and sewer pipelines are laid at a certain depth from the surface of the earth, depending on climatic conditions. In addition, sewer pipelines operating in gravity mode are laid with a certain slope, which is impossible to do when using; prototype followed by deepening the pipeline into the ground. The water or sewer pipe located in the cavity of the culvert according to the prototype will be subject to abrasion by ice and particles carried by the flow, as well as freezing and thawing in climatic conditions with periods of negative temperatures.

The technical result of the utility model is to prevent mechanical damage to pipelines crossing roads and railways.

The technical result is achieved by the fact that the pipeline under the road contains a pipeline, gravel and sand cushion, road surface, a soil-cement slab reinforced in the lower part with transverse and longitudinal rods and resting on a soil massif, while the length of the slab exceeds the width of the road surface by the value of the formation of the pyramid of punching from the extreme edges of the pavement to the thickness of the soil-cement slab, the width of the cross section of the soil-cement slab is equal to the value of the base of the treu olnika formed by lines connecting the edges of the foundation soil-cement plates and the outer surface of the conduit at an angle of not less than the angle of repose of sand on top of the laid pipeline.

A diagram of a device for protecting the pipeline from mechanical damage is presented in figure 1 and figure 2.

The device consists of a soil-cement slab 1, reinforced in its lower part by longitudinal 2 and transverse 3 rods, supported by a soil mass 4. Pipeline 5 crosses the road with a road surface 6. Pipeline 5 is laid on a gravel-sand cushion 7. On top of the protected pipeline 5 sand laid 8.

A device for protecting the pipeline from mechanical damage works as follows. The load from 6 cars moving on the road surface is transferred to its base. The soil-cement slab 1, reinforced with longitudinal 2 and transverse 3 rods located in its lower (stretched) zone, perceives tensile forces arising in the transverse and longitudinal directions when the vehicle is on the road that the protected pipeline crosses 5. Increased in comparison with soil mass mechanical strength of the reinforced cement-soil slab 1 allows you to absorb the loads from vehicles moving along the road surface 6. The layer of sand 8 is designed to soften Ia impact loads perceived priming cement slab 1 and partly transmitted in the direction of the protected line 5.

Exceeding the length of the soil-cement slab 1 over the width of the pavement 6 by the value of the formation of a bursting pyramid from the extreme edges of the road pavement 6 by the thickness of the soil-cement slab allows reinforcing bars 2 and 3 to absorb the forces arising in the soil-cement slab 1 from mechanical stresses, transmitted by pavement 6 from vehicles.

The length of the soil-cement slab 1 exceeds the width of the pavement 6 by the value of the formation of the punching pyramid formed from the extreme edges of the road pavement along the thickness of the soil-cement slab. In the theory of reinforced concrete, the bursting pyramid has faces with a slope of 45 ° to the base. Within the pyramid of bursting, the existing forces are perceived by a cement-cement slab and are not formed in the area of the protected pipeline. This prevents mechanical destruction of the protected pipeline crossing the road.

The width of the cross-section of the soil-cement slab is equal to the size of the base of the triangle formed by the lines connecting the edges of the base of the soil-cement slab and the outer surfaces of the pipeline at an angle not less than the angle of repose of sand laid on top of the pipeline. This allows you to maximize the load bearing capacity of sand in conditions when it is in a state of extreme equilibrium. When the external load is located above the middle of the width of the soil-cement slab, the forces arising in the sand layer above the pipeline are perceived by the sand in the compaction core within the limits of the natural slope. When the load is located above the ribs of the soil-cement massif, the natural slope of the sand is outside (or only touches) the surface of the protected pipe and the loads are transmitted along the slope, deviating from the vertical direction.

The combination of new elements helps to prevent mechanical damage to pipelines under roads.

Claims (1)

The transition of the pipeline under the highway, containing the pipeline, gravel-sand cushion, road surface, characterized in that the transition further comprises a cement-cement slab reinforced in the lower part with transverse and longitudinal rods and resting on the soil massif, while the length of the slab exceeds the width of the road surface by the value of the formation of the pyramid of punching from the extreme edges of the pavement to the thickness of the soil-cement slab, the width of the cross section of the soil-cement slab is equal to a triangle formed by lines connecting the edges of the base of the cement-cement slab and the outer surfaces of the pipeline at an angle not less than the angle of repose of sand laid on top of the pipeline.