RU2660699C1 - Culvert under the embankment - Google Patents

Culvert under the embankment Download PDF

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Publication number
RU2660699C1
RU2660699C1 RU2017105985A RU2017105985A RU2660699C1 RU 2660699 C1 RU2660699 C1 RU 2660699C1 RU 2017105985 A RU2017105985 A RU 2017105985A RU 2017105985 A RU2017105985 A RU 2017105985A RU 2660699 C1 RU2660699 C1 RU 2660699C1
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RU
Russia
Prior art keywords
channel
laid
culvert
embankment
plates
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RU2017105985A
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Russian (ru)
Inventor
Анастасия Ивановна Лебедева
Алексей Аркадьевич Кудряшов
Алексей Андреевич Виноградов
Владислав Николаевич Лисин
Александр Тарасович Михайлов
Алексей Александрович Беляков
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Акционерное общество "Гипрогазцентр"
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Priority to RU2017105985A priority Critical patent/RU2660699C1/en
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Publication of RU2660699C1 publication Critical patent/RU2660699C1/en

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    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01FADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F5/00Draining the sub-base, i.e. subgrade or ground-work, e.g. embankment of roads or of the ballastway of railways or draining-off road surface or ballastway drainage by trenches, culverts, or conduits or other specially adapted means

Abstract

FIELD: construction.
SUBSTANCE: invention relates to construction of culverts in intersection areas by main pipelines of watercourses. Culvert under embankment contains set of concrete slabs laid along profile of stream channel profile, under waterproof perforated cloth made of non-woven synthetic material (NSM) placed on pile with working tube, laid on top of concrete slabs. Bottom and side plates are sealed, and top plates are laid across channel directly to side walls without sealing. With width of water mirror from 5 to 10 m, upper plates are laid along channel on beams located on side plates with calculated step across stream bed.
EFFECT: technical result is increase in operational reliability of pipeline by eliminating watercourse impact.
1 cl, 5 dwg

Description

The invention relates to the construction of culverts at intersections with main pipelines of watercourses (streams, ravines).
Known culvert construction under the embankment, including the layout of the lashes of pipes for water passage. A vertical perforated pipe wrapped with filter material and closed with lids is connected to one of the lashes by welding. Culverts are covered with soil to form an embankment. A gas pipeline crossing a stream is located in an embankment. Flood water through vertical pipes is diverted into a whip of pipes and removed together with the water flowing along the stream (RF patent No. 2137972). A disadvantage of the known device is that the claimed culvert contains material-intensive and significant volumes of pipes susceptible to corrosion. To eliminate the erosion of the channel during long-term operation, sealing of the sinuses is required at the places where the curved surface of the pipes is connected to the ground.
A culvert construction under the embankment is known (RF patent No. 2079599), including excavation of a sump and blocking of an existing stream and discharge of accumulated water in the sump to the other side of the pipeline.
In the drained channel of the stream, an elastic channel is laid out and by means of a cable located under the pipe, the channel is pulled downstream of the stream until the ends of the channel are equally removed from the center of the pipe. Then, ends are made from the ends of the elastic channel. The elastic culvert is pressed tightly to the bottom of the stream along the lower part of the pipe perimeter. On top of the elastic channel and the pipe from its center, panels of non-woven synthetic material are laid out with the ends crushed by soil.
The disadvantage of the above culvert should be considered that the culvert contains elements of two canal structures articulated into a single structure consisting of soft and hard materials, which during long-term operation can violate the calculated cross section of the culvert made of soft material.
As a prototype of the claimed technical solution, a culvert in the body of the embankment with the main pipeline was selected, comprising a culvert with a curved saddle-shaped surface facing the body of the main pipeline and interacting with it; the saddle-shaped surface is made in the shape of the surface of the main pipeline, and in the zone of their interaction there is an elastic element with a sealed cavity filled with overpressure with a hardening composition, while at the free ends of the culvert and part of the embankment covering the main pipeline, as well as in the channel under the culvert the channel deployed permeable flexible carpets (RF patent No. 2303096).
The disadvantage of this solution is as follows. Firstly, this design is installed on an already constructed pipeline having an open pipe section at the intersection of the stream, or on an open section formed during pipeline operation as a result of channel erosion during the underground pipeline laying method.
Secondly, the installation of the structure is complicated by the need to level the bottom of the stream with the organization of a slab foundation for a hollow cylinder resting on it in the zone of interaction between the culvert and the main pipeline.
In addition, this type of culvert does not reduce the loosening zone of the channel bed of soils in regions with permafrost soils, which leads to a decrease in the operational reliability of this section of the main pipeline.
The aim of the invention is to eliminate the effects of the brook on the pipeline, preventing erosion of the channel part, reducing the length of the curved sections.
The problem is solved in that in the culvert under the embankment containing a set of concrete slabs laid according to the configuration of the stream channel profile, under the working pipe placed in the embankment, permeable panels made of non-woven synthetic material (NSM) laid on top of concrete slabs, bottom and side slabs fastened by sealing, and the upper plates are laid across the channel directly on the side walls without sealing. In this case, the upper plates can be laid along the channel on beams located on the side plates with a calculated step across the channel of the stream.
Sealing of the side and bottom plates of the structure, made by a hardening composition of cement-sand mortar with additives for accelerated solidification, prevents erosion of the channel part of the watercourse, and the upper plates laid with a gap provide drainage of surface water and exclude the effect of the watercourse on the pipeline. Thus, a solid structure is created, eliminating wetting of the near-tube soil and soil below the bottom of the stream, which eliminates the ballasting of the area laid in the embankment.
The technical result is an increase in the operational reliability of the pipeline by eliminating the effects of the watercourse.
The design of the culvert under the embankment contains two sizes: culvert with a water mirror width of up to 5.0 m (Fig. 1) and culvert with a water mirror width of 5.0 to 10.0 m (Fig. 2).
In FIG. Figure 1 shows a general view of a section of a pipeline in an embankment when laying along a culvert with a water mirror width of up to 5.0 m.
In FIG. 2 shows a general view of the pipeline in the embankment when laying along a culvert with a water mirror width of up to 10.0 m.
FIGS. 3 and 4 show channel overlap configurations corresponding to FIG. 1 and 2.
The profile of the site considered in the example is shown in FIG. 5.
Each culvert of FIG. 1 is made of hollow reinforced concrete slabs 1, 2 with sealing of their joining lines of the bottom and side surfaces.
On the top of the structure, slabs 4 are laid without sealant, followed by coating with a water-permeable non-woven synthetic material (HCM) 5 and temporary fixation into the ground along the culvert formed from the slabs.
At the intersection of streams with a water mirror with a width of 5 to 10 m, the bottom and side walls of the structure are carried out similarly to the scheme (Fig. 1).
The upper part of the structure (Fig. 2) is made of reinforced concrete beams 3, laid across the structure, on which hollow slabs 4 are laid with a gap along the channel and, similarly to the diagram (Fig. 1), a sheet of HCM 5 is spread.
Fine slurry soil 6 is added to the slabs overlapping the structure according to the NSM (h ≥ 0.2 m), followed by pipe 7 laying. In this case, the height of the soft soil cushion is aligned with the level of the bottom of the trench of adjacent sections.
After laying the pipeline 7 in the places of the organization of the culvert, it is filled up 8, the height of which can reach the marks of the top of the natural channel of the stream.
The described culvert under the embankment when laying pipelines at the intersections of small water barriers (streams, ravines) provides the necessary level of strength and reliability without increasing the wall thickness of the straight pipe section instead of thickened pipes buried below the stream channel with the installation of bends to change the direction of the pipeline axis.
The invention can be implemented in the construction and repair of pipeline sections at the intersections of the stream channel with economic efficiency compared to the deepening of curved pipes of a higher category.
Example
When crossing the ravine of the main gas pipeline DN 1200 to a picket (PK) 8846 + 00.0 - PK 8851 + 00.0, the pipeline was laid underground from category II pipes of size 1220 × 21.2 at the intersection of a water mirror 7.4 m wide with high marks water (air-blast) 1% coverage 47.44 and air-blast 10% 47.38. On PC 8846 + 92.4, an insert of 6 ° and 3 ° taps is used. On the shore of the ravine on PK 8846 + 50.0, an insert was used from the 3 ° and 1 ° bends, on PK 8847 + 50.0 from the 3 ° bend.
The laying of the pipeline section in the embankment is carried out in compliance with the requirements of SNiP 2.05.06-85 * (paragraph 9.5.13, 10.1.1, 10.2.4). Before the construction of the culvert, they dig a pit and block the stream. Drainage technology accumulated in the pit water is diverted to the other side of the pipeline. In a drained riverbed, streams are laid out on the bottom and side walls, hollow slabs preserving the channel configuration as much as possible. Contact lines are filled with sealant. The top of the monolithic channel is blocked by similar plates with a gap. Slabs with a gap are laid along the monolithic channel along transverse reinforced concrete beams mounted at a distance determined by the project. Panels of NSM (non-woven synthetic material) are spread on plates with overlapping the upper surface of the constructed channel. Soil is added to the NSM sheet, which ensures that a straight section of the pipeline crossing the stream is laid in the embankment, in compliance with the requirements of underground laying, using the soil provided for the drainage roller with the traditional laying method, and with the exception of the use of deepening the curved section with crossing streams.
This creates a monolithic structure, eliminating wetting of the near-pipe soil and soil below the bottom of the stream, which eliminates the ballasting of the area laid in the embankment.
The use of FIG. 2 allows you to build a gas pipeline straight from PC 8846 + 50.0 to PC 8847 + 50.0 from pipes of category III 1220 × 17.8 instead of pipes of size 1220 × 21.2 and eliminate the need for ballasting devices of type PKBU-MK-1220 in the amount of 10 groups.
The economic feasibility of using this culvert under the embankment can be traced by reducing the metal consumption of pipes of a straight section of category III instead of category II by 19% and eliminating labor costs for the manufacture of bent bends.
At the same time, the reduction in the cost of controlling the quality of welded joints is indisputable.
The material costs of the NSM panels are comparable to the shore protection mats adopted in the project.
The economic efficiency of earthworks is also visible, but in cost terms it will be determined after the development of the work procedure for a specific intersection site, taking into account the costs of constructing a culvert from hollow reinforced concrete slabs (the average cost in N. Novgorod is 1.1 thousand rubles / m 2 ) with filling the pipes with soil - laying in the embankment.

Claims (2)

1. Culvert under the embankment, containing a set of concrete slabs laid according to the profile of the channel of the stream, under the working pipe placed in the embankment, permeable panels of non-woven synthetic material (NSM), laid out over concrete slabs, characterized in that the bottom and side slabs are fastened by sealing, and the upper plates are laid across the channel directly on the side walls without sealing.
2. The culvert according to claim 1, characterized in that the upper slabs are laid along the channel on the beams located on the side slabs with a calculated step across the channel of the stream.
RU2017105985A 2017-02-21 2017-02-21 Culvert under the embankment RU2660699C1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2079599C1 (en) * 1995-02-02 1997-05-20 Научно-исследовательский и проектный институт "Севернипигаз" Water conveyance structure under embankment
RU2137972C1 (en) * 1998-03-19 1999-09-20 Предприятие по добыче, переработке и транспорту газа "Севергазпром" Water-escape structure under embankment
US7080956B2 (en) * 2004-11-29 2006-07-25 Terratech Consulting Ltd. Open bottom box culvert
RU2303096C2 (en) * 2005-09-02 2007-07-20 Открытое акционерное общество "Газпром" Culvert (variants) and method for its construction

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2079599C1 (en) * 1995-02-02 1997-05-20 Научно-исследовательский и проектный институт "Севернипигаз" Water conveyance structure under embankment
RU2137972C1 (en) * 1998-03-19 1999-09-20 Предприятие по добыче, переработке и транспорту газа "Севергазпром" Water-escape structure under embankment
US7080956B2 (en) * 2004-11-29 2006-07-25 Terratech Consulting Ltd. Open bottom box culvert
RU2303096C2 (en) * 2005-09-02 2007-07-20 Открытое акционерное общество "Газпром" Culvert (variants) and method for its construction

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
СВОД ПРАВИЛ 36.13330.2012, Магистральные трубопроводы, М., 2013, п.10. *

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