RU1810706C - Method of laying pipeline of flooded regions - Google Patents

Abstract

SUMMARY OF THE INVENTION: a trench is torn off, a pipeline (TP) is laid in it and secured by it connected to the TP by means of power shafts and pull-open anchors. The opening of the anchors and their introduction into the mainland soil is carried out by moving the TS under the influence of the buoyancy force filling the trench water. The bottom of the trench is made in the form of a dihedral angle; slabs placed adjacent to each other on the inclined faces of the bottom of the trench are used as anchors. TP laid on plates. The plates are connected by flexible rods to each other and a pair of rods through a power pole with a TP with the possibility of limited rotation of the plates during the surfacing of the TP. For this purpose, the near KTP rods are connected with a tension belt, and the long ones with sag. 3 ill.

Description

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The invention relates to construction and can be used in the construction of underground pipelines for various purposes.

The purpose of the invention is to increase the reliability of securing the pipeline by increasing the area of frontal resistance to movement during ascent and engaging in work to reveal and ballast large masses of soil, both mainland and bulk.

Figure 1 shows a section of a pipeline laid in a trench during installation according to the method; figure 2 is the same, when working with maximum holding ability; in Fig.Z - node I in Fig.2.

Example. A method of laying a pipeline in irrigated areas is as follows. In mainland soil 1, a trench 2 is developed with vertical walls 3 and a bottom 4. The bottom 4 is made in the form of a dihedral angle, using excavation equipment with buckets of a similar profile for development. Then, the plates 5 are lowered onto the inclined faces of the bottom 4 in the trench 2, while the edges of the plates 5 adjacent to the pipeline 6 are joined in pairs to each other, and the far edges of the plates 5 are supported on the mainland 1 in the corners formed by the vertical walls 3 and the bottom 4 of the trench 2. The adjacent proximal edges of the paired plates 5 are connected, for example, by mounting loops with flexible rods 7 from rod or wire reinforcement, which are twisted or electrically welded. Then, the adjacent rods 8 and the distant rods 9 are respectively connected to the plates 5 in the near and distant attachment points, and their free ends are pulled apart. From above, pipe 6 is lowered onto the joint of plates 5 by the pipe layer. From above, a power pipe is laid on the pipe 6

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10. The ends of the power belt 10 are connected to the free ends of the rods 8 and 9, with 8 securing the tension, and the rods 9 securing with free settlement slack. The sag value is defined as the hypotenuse of a right triangle, the legs of which are equal: one is the height from the plate 5 to the force bar 10, and the other is the distance from the vertical projection of the edge of the force bar 10 to the farthest anchor point of the plate 5. This fixation limits the plates 5 turning beyond the horizontal axis and eliminates the displacement of the joined edges of the plates 5 in the longitudinal and vertical directions. At the end of fixing all the rods 7, 8 and 9, the trench 2 is covered with mainland soil 1 taken out during development and compacted. Under the action of the mass of soil 1 laid on the slabs 5, the edges of the slabs 5 farthest from the pipeline 6 are pressed into the main soil 1 of the walls 3 of the trench 2. When the trench 2 is flooded, the buoyant force of water begins to act on the pipeline b, which forces it to move up and down 8 to carry along the joint of plates 5, united by a flexible cable 7, and the free edges of the plates 5, distant from the pipeline 6, abut against the mainland soil and gradually penetrate into the walls 3 of the trench 2 vertically upward without moving to full tension 9 and open or 5 in a horizontal plane of movement of the drag complete. With the full disclosure of each pair of plates 5, their edges are embedded in undisturbed continental soil 1, since their total width exceeds the width of the trench 2. Bringing plates 5 into such a working location

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The spontaneous and reliable fixation of the pipeline 6 not only by the mass of the prism of the soil 1 located above it, but also the adjacent prisms of the undisturbed continental soil 1 of the walls 3 and the pressure forces created by the edges of the plates 5.

The application of the method allows to achieve increased reliability of securing the pipeline by using the buoyancy force of water to increase the holding forces, it can greatly facilitate the construction of pipelines, especially in irrigated areas.

Claims (1)

SUMMARY OF THE INVENTION A method of laying a pipeline on watered territories, which consists in tearing off a trench, laying the pipeline in it and securing it with the anchors connected to the pipeline by means of power shafts and pull rods, the anchors being opened and introduced into the mainland soil by moving pipeline under the influence of the buoyancy force filling the trench water, characterized in that the bottom of the trench is made in the form of a dihedral angle, as anchors use plates that are placed t adjoining one another on the inclined faces of the bottom of the trench, and the pipeline is laid on plates, while the plates are connected by flexible rods to each other and a pair of rods through the power supply with the pipeline with the possibility of limited rotation of the plates when the pipeline emerges, for which, closer to the pipeline, the rods are connected to the power belt with tension, and the long ones with sag.