RU2303096C2 - Culvert (variants) and method for its construction - Google Patents

Culvert (variants) and method for its construction Download PDF

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Publication number
RU2303096C2
RU2303096C2 RU2005127607/03A RU2005127607A RU2303096C2 RU 2303096 C2 RU2303096 C2 RU 2303096C2 RU 2005127607/03 A RU2005127607/03 A RU 2005127607/03A RU 2005127607 A RU2005127607 A RU 2005127607A RU 2303096 C2 RU2303096 C2 RU 2303096C2
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Russia
Prior art keywords
culvert
pipeline
channel
main pipeline
under
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RU2005127607/03A
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Russian (ru)
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RU2005127607A (en
Inventor
Валерий Михайлович Шарыгин (RU)
Валерий Михайлович Шарыгин
Анатолий Яковлевич Яковлев (RU)
Анатолий Яковлевич Яковлев
Николай Николаевич Травин (RU)
Николай Николаевич Травин
Игорь Владимирович Максютин (RU)
Игорь Владимирович Максютин
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Открытое акционерное общество "Газпром"
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Abstract

FIELD: draining the sub-base of roads or ballastway of railways by trenches, culverts, or conduits, particularly to create culverts in main pipeline and transversal waterway intersection point.
SUBSTANCE: method involves arranging culvert channel; filling opened pipeline and culvert channel sections with filling material; tamping ground under pipeline; consolidating filling material around culvert channel; arranging intermediate support under pipeline, wherein the intermediate support is made as flexible shell filled with hardening composition. Before culvert channel laying depression is made in waterway bed so that the depression extends for the full waterway length. Culvert channel is placed in the depression and advanced under pipeline so that the culvert channel rests upon foundation panel previously laid under the pipeline. After that depression is filled with filtering material. Intermediate support is arranged between pipeline and culvert channel. Hardening material is supplied to the shell under pressure calculated from main pipeline body bending moment value. Filling material is consolidated by covering lower embankment part with flexible permeable mats, which encloses culvert channel surface. Culvert constructed by described method is also disclosed.
EFFECT: increased operational reliability of culvert and main pipeline.
6 cl, 1 ex, 6 dwg

Description

The invention relates to the construction of culverts at intersections of main pipelines with transverse waterways.
It is known culvert structure (BC) containing the foundation, the pipe placed in the recess of the foundation, and an elastic element located between the pipe and the foundation (see copyright certificate No. 926147, M. 3 class. E01F 5/00, publ. 15.05.82) . This structure can be used at the intersection of the main pipeline (MT) only when the clearance between the MT and the day surface of the soil is not less than the diameter of the aircraft.
As a prototype for the claimed technical solution, a culvert under the embankment was selected, containing a culvert located in the embankment, the upper generatrix of which has a curved shape that provides direction of movement of warm air from the center to the ends, which prevents the channel from freezing and allows the passage of flood waters (see copyright certificate No. 1532637, M. 3 cl. E01F 5/00, publ. 30.12.89).
The shortcomings of aircraft according to AS No. 1532637 are as follows. Firstly, this aircraft operates when it is installed below the MT; secondly, with the inevitable settlement of the embankment and soil supports, the gap between the aircraft and the MT will decrease due to the deflection of the MT, which will cause the development of a bending-stressed state in the walls of the MT and a corresponding decrease in its operational reliability; thirdly, the design of the embankment at the aircraft installation site does not exclude soil entrainment at high water discharge in the channel of the watercourse; fourthly, the known design of the aircraft does not allow to reduce the existing bending moments in the body of the MT.
A known method of constructing a culvert, taken by us as a prototype, in which a culvert is located under the pipeline, and after laying fill in the open section of the pipeline with tamping soil under the pipeline. At the entrance of the stream to the culvert, the seams and cracks are watertight by means of a clay castle. At pipelines with spans of more than 40 meters, an intermediate support is provided, it is made of compacted soil placed in bags of non-woven synthetic material (NSM) (see the book "Construction in difficult climatic and soil conditions of the Far North", VNIIST works. N. D.Akhtimirov, V.N. Lisin and others. "Constructive solutions for laying and reconstruction of air passages of trunk pipelines through small water barriers" Moscow, 1991, pp. 8 ÷ 9).
The disadvantage of the above method is the lack of operational reliability of the culvert.
The objective of the invention is to increase the operational reliability of the culvert and the main pipeline.
The problem for the culvert in the body of the embankment with the main pipeline, containing the culvert with a curved saddle-shaped surface facing the body of the main pipeline and interacting with it, is solved by the fact that the saddle-shaped surface is made in the form of the surface of the main pipeline, and in the zone of their interaction is elastic an element with a sealed cavity filled under overpressure with a hardening composition, while at the free ends of the culvert as well as parts of the embankment covering the main pipeline, as well as in the channel of the watercourse under the culvert, flexible permeable carpets are deployed.
The problem for the culvert is also solved by the fact that the permeable flexible carpet deployed in the channel of the watercourse is made protruding outward at the ends of the culvert, and the permeable flexible carpet covering the part of the embankment, covering the main pipeline and the free ends of the culvert, is laid not reaching the ends culvert for the amount of 0.2 ÷ 0.5 of the outer diameter of the culvert.
The problem for the culvert is also solved by the fact that the culvert in the form of a hollow cylinder is made resting on the slab foundation under the zone of interaction between the culvert and the main pipeline.
The problem for the culvert is also solved by the fact that the permeable flexible carpet is made mainly of non-woven synthetic materials, the walls of the elastic element are made of rubberized fabric reinforced with fiberglass, and the hardening composition is presented in the form of a cement-sand mortar with additives for accelerated hardening.
The problem for the culvert, in the body of the embankment with the main pipeline, containing the culvert with a saddle-shaped surface facing the body of the main pipeline and interacting with it, is solved by the fact that in the culvert of the upper location above the main pipeline the saddle-shaped surface is made in the shape of the surface of the main pipeline in the form of a fragment of the shell motionlessly connected to the body of the culvert or in the form of a separate overhead sheet laid on the surface of the main pipeline and fixed on it by a culvert installed on top with a recess located beneath it and filled with filter material, while the main pipeline and the channel of the watercourse, as well as the upper generatrix of the culvert, are covered by permeable flexible carpets.
The task for the method of constructing a culvert in the body of the embankment with the main pipeline, including the installation of a culvert, filling the open section of the pipeline and culvert with tamping soil under the pipeline, strengthening the filling adjacent to the culvert, an intermediate support device under the pipeline, made in the form of a shell from a flexible material filled with a hardening composition, it is decided that before installing the culvert in the channel of the watercourse t the recess to the length of the culvert, put the culvert in the recess and bring it under the pipeline, resting on the foundation plate previously placed under the pipeline, fill the recess with filter material, and the intermediate support is placed between the pipeline and the culvert, and the hardening composition is fed into the shell under pressure determined by calculation, based on the magnitude of the bending moment in the body of the main pipeline, and the filling is strengthened by blocking the pump pi in its lower part with flexible permeable carpets, covering the surface of the culvert.
The salient features of the claimed culvert are as follows (option I):
- the saddle-shaped surface is made in the form 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 a hardening composition under overpressure;
- at the free ends of the culvert and part of the embankment covering the main pipeline, as well as in the channel of the watercourse under the culvert, water-permeable carpets are deployed;
- permeable flexible carpet, deployed in the channel of the watercourse, made protruding outward at the ends of the culvert;
- permeable flexible carpet that covers part of the embankment, covering the main pipeline and the free ends of the culvert, is laid 0.2-0.5 outside diameter of the culvert, not reaching the ends of the culvert;
- the culvert in the form of a hollow cylinder is made resting on the slab foundation under the interaction zone of the culvert and the main pipeline;
- permeable flexible carpet is made mainly of non-woven synthetic materials, the walls of the elastic element are made of rubberized fabric reinforced with fiberglass, and the hardening composition is presented in the form of a cement-sand mortar with additives to accelerate hardening.
Salient features of the claimed culvert are the following (option II):
- in the culvert channel of the upper location above the main pipeline, the saddle-shaped surface is made either in the form of a shell fragment motionlessly connected to the culvert body or in the form of a separate overhead sheet;
- a saddle-shaped surface interacts with the main pipeline;
- a recess filled with filtering material is made under the culvert;
- in this case, the main pipeline and the channel of the watercourse, as well as the upper generatrix of the culvert are blocked by permeable flexible carpets.
Salient features of the claimed method of construction of a culvert are the following:
- before installing the culvert in the channel of the watercourse, a recess is made to the length of the culvert, put the culvert in the recess and bring it under the pipeline, resting them on a foundation plate previously laid under the pipeline;
- the recess is covered with filter material, and the intermediate support is placed between the pipeline and the culvert;
- hardening composition is fed into the shell under pressure, determined by calculation, based on the magnitude of the bending moment in the body of the main pipeline;
- reinforcement of the filling is carried out by covering the embankment in its lower part with flexible permeable carpets, covering the surface of the culvert.
The above significant distinguishing features of the claimed invention were unknown to us from the patent and scientific and technical information and in combination with the known features allow us to solve the problem posed to the invention. And this allows us to conclude that the claimed invention is "New."
The invention meets the criterion of "Inventive step", as it is not obvious to the average person skilled in the art.
The invention is “industrially applicable” because it does not require scarce materials and special equipment for its implementation.
The scheme of the culvert is shown in figure 1 ÷ 6. The design is divided into two types: the upper location, when the culvert is located above the main pipeline (Fig. 1 ÷ 3) and the lower location, when the culvert is located under the main pipeline (Fig. 4 ÷ 6). The first design is used in cases of short blurred sections of the main pipeline at a length of 2 ÷ 10 m in the channel of watercourses, and in height - within 0.2 ÷ 0.6 days (Day is the outer diameter of the main gas pipeline). The second design is used for sagging sections of the main pipeline for a length of 10 ÷ 50 m with a clearance between the bottom of the watercourse and the lower generatrix of the pipe within 0.2 ÷ 0.8 Days.
The design of the culvert of the lower location contains a culvert 1 made of steel pipe, containing a saddle-shaped recess 2, an elastic element 3 located between the culvert and the main pipeline, a hardening composition 4, injected into the cavity of the elastic element 3, the base plate 5, installed under the recess 2, a flexible carpet 6, deployed under the culvert channel 1 in the channel of the watercourse 7 on the plate 5 and overlapping the recess 8 with a filter backfill 9, the backfill soil 10 surrounding the water passage oh channel 1 and a section of the pipeline 11, a flexible carpet 12, covering the soil of the embankment 10 and the free ends of the culvert 1, not reaching its ends by 0.2 ÷ 0.5 days, the soil of the embankment 13 above the flexible carpet 12, protective peeling layer 14 (figures 1, 2, 4-6). The culvert channel 1 is made in the form of a closed cylindrical shell (figa) or part of it (figb). The recess 2 is made with or without a saddle-like element 15 (figa, 3b, 6a, 6b).
Example.
The method of constructing a culvert is carried out in the following order. As the culvert channel 1, choose steel pipes, the amount of which is determined by the flow of water in the spring flood. In the middle of the culvert channel 1, a saddle-shaped recess 2 is cut by welding along the surface of the cylinder, the axis of which intersects the axis of the channel 1 at right angles. For the bottom culvert, the cylindrical surface of the recess is hermetically sealed with a sheet of pipe 15 of the same diameter as the culvert 1. For the top culvert, two options are used: one of them is described above, and the second recess is left with a hole, and the role sheet of pipe 15 performs a separate overhead sheet 3 without a cavity, previously applied to the main pipeline 11. Sheet 3 is made of polyethylene or plastic with a thickness of 5 ÷ 10 mm, from a molded stack oplastikovoy panel or nonwoven synthetic material impregnated with a curable polymer composition, e.g., polyurethane.
For the upper culvert device in the channel of the watercourse 7, a recess 8 is dug up to a length slightly exceeding the length of the culvert, the cavity is filled with filtering material, such as crushed stone, then the pipe 11 and the channel of the watercourse 7 are covered with a permeable flexible carpet 6 made of NSM welded together non-woven synthetic material), a separate overhead sheet 3 is installed on the pipe 11, a culvert channel 1 is installed on it so that the saddle-shaped surface 2 tightly pressed the sheet 3 and carpet 6 to the pipeline 11. After installing the culvert channel 1, fill the soil 10 to the section of the pipeline 11 to the level of the upper generatrix of the culvert 1, leaving its ends free. Then, on top of the filling 10, a permeable flexible carpet 12 is laid, blocking the free ends of the culvert 1, not reaching its ends 0.2 ÷ 0.5 days. On top of the carpet 12, soil 13 is poured and the final bed of the channel of the watercourse 7 and culvert is produced by the protective peat layer 14 (Figs. 1, 2).
For the culvert of the lower location, a recess 8 is opened to the length of the culvert 1, where the culvert 1 is placed, then a foundation plate 5 is placed under the pipe section 11, it is blocked, the channel of the watercourse 7 and the recess 8 are flexible carpet 6, the culvert 1 is moved with recess 2 of the elastic element 3 under the pipe 11 so that the elastic element 3 is between the pipe 11 and the recess 2, the recess 8 is filled with filter material 9. After that, they are pumped into the cavity of the elastic element 3 under ION 4-hardening composition, for example a cement-sand mortar, which during filling through the wall element 3 communicates with the conduit 11 and the water throughput duct 1. The resultant vertical force presses the channel 1 to the plate 5 and the pipe lifts 11 partially unloading it from bending moment. After reaching the calculated value of the rise of the pipeline 11, the injection of the composition 4 is stopped, it hardens, fixing the new position of the pipeline 11 in the unloaded state. Then fill the culvert channel 1 and the pipe 11 with soil 10 to the upper generatrix of the pipe 11, filling the ends of the culvert 1 with the free ends, cover the soil 10 and the free ends of the channel 1 with a permeable flexible carpet 12, not reaching the ends of the channel 0.2 ÷ 0.5 days . Soil 13 is poured over the carpet 12 and the final soil is poured with soil 13 and a protective peat-vegetable layer 14.
The culvert works as follows. In the low-water period (the lowest water level), the watercourse passes through the filter material 9, therefore, water does not accumulate near the embankment 10. When the flow increases, the water passes through the culvert 1. Water-permeable flexible carpets 6, 12 prevent the erosion of the embankment 10. For the passage of flood waters backup culverts in embankment 13 (not shown) shall be provided.
The culvert device and the method of its construction, in comparison with the prototype, increase the reliability of the main gas pipeline at the intersections of small water barriers by reducing bending moments in the pipe body, creating a layer of embankment soil protecting the pipeline from external loads, reinforced with non-woven material, while providing a culvert with low-pressure and flood regimes of a watercourse crossing the route of trunk pipelines.

Claims (6)

1. The culvert in the body of the embankment with the main pipeline, containing a culvert with a curved saddle-shaped surface facing the body of the main pipeline and interacting with it, characterized in that the saddle-shaped surface is made in the shape of the surface of the main pipeline, and in the area 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, Pipeline pipeline conduit and in line with a watercourse culvert conduit deployed permeable flexible carpets.
2. The culvert device according to claim 1, characterized in that the permeable flexible carpet deployed in the channel of the watercourse is made protruding outward at the ends of the culvert, and the permeable flexible carpet covering the part of the embankment covering the main pipeline and the free ends of the culvert is not laid reaching the ends of the culvert by the amount of 0.2-0.5 of the outer diameter of the culvert.
3. The culvert device according to claim 1, characterized in that the culvert in the form of a hollow cylinder is made resting under the zone of interaction between the culvert and the main pipeline on a slab foundation.
4. The culvert device according to claim 1 or 2, characterized in that the permeable flexible carpet is made mainly of non-woven synthetic materials, the walls of the elastic element are made of rubberized fabric reinforced with fiberglass, and the hardening composition is presented in the form of a cement-sand mortar with additives for accelerated hardening.
5. A culvert in the body of the embankment with the main pipeline, comprising a culvert with a curved saddle-shaped surface facing the body of the main pipeline and interacting with it, characterized in that in the culvert of the upper arrangement above the main pipe, the saddle-shaped surface is made in the shape of the surface of the main pipeline in in the form of a fragment of the shell motionlessly connected to the body of the culvert, or as a separate overhead sheet, nnogo the surface of the main pipe and fixed on the top of pipe installed therein a channel with an underlying filter material and filled with a recess, wherein the main conduit and the watercourse bed and the top of pipe forming the channel blocked permeable flexible carpets.
6. A method of constructing a culvert in the body of the embankment with the main pipeline, including the installation of a culvert, filling the open section of the pipeline and culvert with tamping the soil under the pipeline, strengthening the filling adjacent to the culvert, an intermediate support device under the pipeline, made in the form of a shell of flexible material filled with a hardening composition, characterized in that before installing the culvert in the channel of the watercourse, a recess is performed at lengths at the culvert channel, put the culvert in the recess and bring it under the pipeline, resting on the foundation plate previously placed under the pipeline, fill the recess with filter material, and place the intermediate support between the pipeline and the culvert, and the hardening composition is fed into the shell under pressure determined by the design by, based on the magnitude of the bending moment in the body of the main pipeline, and the filling is strengthened by blocking the embankment in its lower part ibkimi permeable covering carpeted culvert channel surface.
RU2005127607/03A 2005-09-02 2005-09-02 Culvert (variants) and method for its construction RU2303096C2 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105442464A (en) * 2015-12-31 2016-03-30 长安大学 Method for reinforcing culvert through corrugated steel pipes and consolidated sand
RU2660699C1 (en) * 2017-02-21 2018-07-09 Акционерное общество "Гипрогазцентр" Culvert under the embankment
CN110055929A (en) * 2019-04-23 2019-07-26 广东水利电力职业技术学院(广东省水利电力技工学校) A kind of construction method of Pipeline Crossing Program soft base river levee

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ШАЛЬНОВА А.П. Справочник строителя. Строительство городских систем газоснабжения. - М.: Стройиздат, 1976, с.163-173. *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105442464A (en) * 2015-12-31 2016-03-30 长安大学 Method for reinforcing culvert through corrugated steel pipes and consolidated sand
CN105442464B (en) * 2015-12-31 2017-08-25 长安大学 The method that a kind of use corrugated steel tube and containing consolidated sand reinforce culvert
RU2660699C1 (en) * 2017-02-21 2018-07-09 Акционерное общество "Гипрогазцентр" Culvert under the embankment
CN110055929A (en) * 2019-04-23 2019-07-26 广东水利电力职业技术学院(广东省水利电力技工学校) A kind of construction method of Pipeline Crossing Program soft base river levee

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