RU2195596C2 - Passage of pipe line through water obstacle - Google Patents

Abstract

FIELD: construction engineering; erection of pipe lines crossing water obstacles. SUBSTANCE: pipe line is ballasted and filling is reinforced with utilized tires laid at reduced sizes to banking. Dam is erected down- stream. Mark of inlet end of water transfer pipe is positioned at level of upper generatrix of pipe line banking. EFFECT: enhanced reliability. 2 cl, 2 dwg

Description

 The invention relates to the field of pipeline transport.

 Known for the passage of the pipeline through the water barrier, consisting of the pipe itself, anti-corrosion insulation, weights and backfill with a thickness of at least 1 m / 1 / over the upper generatrix of the pipeline.

 A disadvantage of the known transition is the high probability of erosion of the transition, the complexity of the construction and repair.

 The prototype is the passage of the pipeline through a water barrier, consisting of the pipe itself, anti-corrosion insulation, weights and reinforced backfill / 2 /.

 The disadvantage of the prototype is the large porosity, which causes an increase in the hydrodynamic effects of the flow and a decrease in the reliability of the transition.

 The aim of the invention is to increase the reliability of the transition.

 The goal is achieved by the fact that at the transition, consisting of the pipe itself, anti-corrosion insulation, weights and reinforced backfill, the reinforcement design is selected based on the condition of minimizing the thickness of the backfill over the upper generatrix of the pipeline, for example, used tire covers laid in a decreasing standard size from the sole as reinforcement a ditch to its top, and a dam was erected downstream of the pipeline, the marks of the receiving end of the culvert are set at the level of the upper generatrix of the collapse Bani.

 The essence of the invention is illustrated by the drawing (figure 1 and 2), in which the following notation: 1 - insulated pipeline; 2 - lining; 3 - load; 4 - filling; 5 - screen; 6 - tires; 7 - communication; 8 - anchor; 9 - sand-gravel-crushed stone mixture; 10 - a dam; 11 - culvert.

 At the transition through the water barrier, consisting of the insulated pipe 1 itself, weights 3, screen 5, for example, reinforcement tires 4 used, for example, tires 6, laid in decreasing sizes from the bottom of the debris to its top, as reinforcement for filling 4. Car tires 6 can be fixed to the bottom of the pond with anchors 8 and filled with sand-gravel-crushed stone mixture 9. The weights 3 are located outside the area providing stability and strength of the pipeline 1 from the resulting force pushing out of the water, using, for example, the design of the beam or arch transitions.

 Repair the transition of the pipeline through the water barrier is as follows.

 Open the pipeline 1, dismantle the weights. After repairing the insulation of pipeline 1, the latter is lined with 2-3 layers of roofing material or wrapping film 2 (a protective cylindrical shell of half a larger steel pipe can be laid on the lining). Mount the weights 3. Weights 3 are laid outside the area that provides stability and strength of the pipeline 1 from the resulting buoyancy force. At the same time, the freights are located on coastal areas, freeing the channel part. If the channel part, based on the conditions of observing strength and stability, cannot be freed from weights, then the latter is located, using belts, below the upper generatrix of the pipeline. The pipeline 1 and the weights 3, densifying them in layers, are filled with ballast 4 and covered with an anti-diffusion screen 5, for example, a non-woven synthetic material. On the screen 5 stack tires 6 in decreasing size from the bottom up. On the sole of the embankment, for example, tires MAZ, KAMAZ are laid, higher - on the embankment of decreasing size, for example, ZIL, GAZ, UAZ, VAZ. Car tires 6 are fastened together by ties 7, nylon ropes or galvanized wire.

 The extreme tires are anchored with pipes or reinforced concrete pillars 8. The void between the tires is filled with sand-gravel-crushed stone mixture 9. If sand-gravel mixture is used as filling 4, then the same sand-gravel-crushed stone mixture 9 can perform the function of screen 5. If the morphometric the calculation confirms that the parameters of the debris and hydrogeological characteristics of the reservoir do not ensure the stability of the bottom and banks of the reservoir, then a dam 10 with culverts is erected downstream of the pipeline 11. Dam height , the number and diameter of the drainage pipes can be determined by calculating the flow rate of flood water 5% of security in accordance with SNiP 2.01.14-83.

 The transition of the pipeline through the water barrier works as follows.

 Morphometric calculations allow, taking into account the living cross-sectional area, the slope of the water surface and the roughness of the cross section of the stream, to calculate the speed and flow rate at various levels in a given diameter across the stream, which, in turn, allows taking into account the ground conditions of the stream to evaluate its resistance to erosion.

 The strength of the hydrodynamic effect of the water flow on the transition depends on the emptyness of the channel. The emptyness of the channel can be controlled by changing the height of the debris of the pipeline and the erection of the pipeline downstream of the dam. The use of small tires on the upper rows of the reinforcing elements allows to reduce the emptyness of the channel in the area of the underwater passage. The use of tires of large standard sizes on the sole of the embankment makes it possible to increase the stability of the reinforcement and accelerate the reinforcement process, and a gradual change in the standard sizes of tires makes it possible to ensure the streamlining of the surface of the pipeline debris.

 Decrease in emptyness allows increasing the cross section of the channel. This contributes to the flow of water without disturbance, which reduces the likelihood of erosion of the bottom and coastal sections of the transition. Artificial siltation also allows you to stabilize the temperature regime of operation of the pipeline, the electrochemical situation around it, which allows you to optimize the conditions of its operation and increase the reliability of the underwater passage.

List of sources used
1. SNiP 2.05.06-85 *. Trunk pipelines.

 2. RD 51-2.4-007-97. Fighting water erosion of soils on the linear part of pipelines. - M .: 1998. p.39 (prototype).

Claims (2)

 1. The passage of the pipeline through the water barrier, consisting of the pipe itself with anti-corrosion insulation, weights, reinforced backfill and lower culvert, characterized in that the reinforcement design is selected on the basis of minimizing the thickness of the backfill over the upper generatrix of the pipeline, for example, recycled car tires laid in decreasing standard sizes from the bottom of the debris to its top.  2. The passage of the pipeline through the water barrier according to claim 1, characterized in that a dam is erected downstream, and the marks of the receiving end of the dam culvert are set at the level of the upper generatrix of the pipeline debris.

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