CN108350675B - Weldless three-dimensional geocell system for soil stabilization and prefabricated member for preparing same - Google Patents
Weldless three-dimensional geocell system for soil stabilization and prefabricated member for preparing same Download PDFInfo
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- CN108350675B CN108350675B CN201680065599.4A CN201680065599A CN108350675B CN 108350675 B CN108350675 B CN 108350675B CN 201680065599 A CN201680065599 A CN 201680065599A CN 108350675 B CN108350675 B CN 108350675B
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- Prior art keywords
- preform
- preform according
- geocell
- weldless
- geocell system
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/24—Perforating, i.e. punching holes
- B21D28/26—Perforating, i.e. punching holes in sheets or flat parts
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
- E02D17/202—Securing of slopes or inclines with flexible securing means
Abstract
The present invention relates to the field of construction, and in particular to geotextile mesh structures and can be used for stabilizing shorelines, reservoir beds, slopes and retaining wall abutments in the oil and gas, transportation and hydraulic engineering industries, and other construction fields. A preform for manufacturing a weldless geocell system is made of a sheet (1) of flexible material in which incisions (2) are formed, said incisions having a central portion (3) in the form of a straight line and two end portions (4) in the form of an arcuate line, wherein the central portions (3) of the incisions (2) are arranged in rows (R1, R2.. RN), and the incision lines in adjacent rows are mutually staggered in the direction of the incisions. The technical effect is to increase the tensile strength of the geocell system and to reduce the labor intensity of manufacturing it.
Description
Description
The invention relates to the building industry, namely to geocell systems and can be used for reinforcing pool shorelines and beds, slopes, embankment cones, retaining walls in oil and gas, transport, hydraulic engineering and other building fields where geocells should have good and stable strength and endurance parameters.
The prior art discloses geonet (geonow) geocells for slope stabilization, made of polymeric strips interconnected in staggered sequence along their transverse ribs at a predetermined pitch and fixed to the slope in their stretched condition to form rhomboidal cells (see russian patent numbers 2152479, E02D17/20, 2000).
In addition, a geocell system is known, which is formed of strips of polymer material arranged on a polymer base to form cells for confining discrete materials, the walls of which are partially curved in the opposite direction of the slope (see swiss patent No. 652155, E02D17/20, 1985).
There is known a geocell system made of a polymer material, in which when the geocell system is stretched, porous polymer strips of long rhomboidal cells are anchored at the positions on the slopes by anchors, and the cells themselves are filled with a discrete material (see japanese patent No. 56016730, e02D17/20, 1981).
The known designs of geocell for stabilizing soil structures do not fully achieve the aim of fixing material on a slope, because such a geocell may move down the slope under the influence of its filling material, which is a peat-sand mixture, coarse gravel or a combination of various discrete materials, during the filling of the material into its cells and during the operation after the filling of the material into the cells, with the result that the preset slope profile may be lost due to the filling material accumulating at its foundation.
The preforms known in the prior art for extended geocell systems are made from sheet material in which the segment-shaped slots are made in rows with adjacent rows interleaved with one another (see russian patent numbers 2090702, 20.09.1997). The slots may have stiffening elements in the form of thickened areas. Such geocell systems can be prepared by stretching a preform to form a three-dimensional honeycomb structure. A disadvantage of such a preform is that when it is stretched, plastic deformation of the sheet material occurs, which can result in an unbalanced strength of the geocell system. Also, because slots are used in the preform in an extended state, the wall thickness (i.e., the distance between the edges of adjacent slots) may vary at different locations in the geocell system so prepared. Stress is concentrated in the thinner portions of the walls, which reduces the tensile strength of such geocells.
The closest analogues to the claimed invention are the sheet preform described in the prior art section of russian patent No. 2090702, 20.09.1997, a weldless grid geocell system made therefrom, and a method for making the geocell system. Such preforms are made in the form of polymer sheets having slots that are staggered with respect to one another. A weldless geocell system can be prepared by stretching such a preform. A disadvantage of this closest analog is also the low tensile strength of the geocell because during stretching, the stress is concentrated at the ends of the slots.
The object of the present invention is to eliminate the drawbacks of the prior art solutions.
The technical effect is to increase the tensile strength of the geocell system and to reduce the labor intensity of its manufacture.
The above technical effect is achieved in a preform for forming a weldless geocell, because: the preform is made of a flexible sheet material having cuts with a central portion in the form of a straight line and two ends in the form of circular arcs, the central portions of the cuts being arranged in rows, the cut lines in adjacent rows being staggered (offset) in the direction of the cuts, the ends of the cuts having thickened areas, and the thickness of the preform in the thickened areas being up to 300% of the thickness of the body of sheet material.
Further, the above technical effect is achieved in a particular embodiment of the preform, because:
-the ends of the incisions have thickened areas, at which the thickness of the preform is up to 300% of the thickness of the body of sheet material;
the end portions enable the cut to be turned 90 ° with respect to the central portion;
-the preform is made of a polymeric material;
-shaping the thickened area at the end of the incision into a circle or an ellipse;
the preform has an additional thickened region prepared in the region where the central part of the incision is located;
-the thickness of the preform in the additional thickened region is up to 300% of the thickness of the body of sheet material;
-the preform is made in the form of a strip;
-the sheet material is reinforced with threads or a mesh;
aramid or carbon threads for reinforcement;
the central portions of the incisions have the same length L;
-one row (R)1，R2，...RN) The central portions of adjacent slits are arranged with a distance S between their ends and a ratio S/L K1, where K1 is 0.1 to 0.5, preferably 0.3 to 0.35;
-adjacent rows (R)1，R2，...RN) The central parts of the slits in (a) are arranged at a distance D from each other and the ratio D/L is K2, wherein K2 is 0.1 to 0.7;
the ends of the cut protrude a distance L1 with respect to the central portion, L1 being 1/10L to 1/15L;
the prefabricated member has additional holes for ribs for attaching the geocell system in the extended state on a slope;
-arranging additional holes for the ribs in a row (R)1，R2，...RN) Between adjacent incisions;
-making thickened areas around the extra holes, the preform thickness in these areas being up to 300% of the bulk thickness of the sheet material;
the preform is provided with drainage holes;
-the sheet material is made textured;
the incisions are made by laser cutting or punching.
The above technical effect is achieved by a weldless geocell system that includes at least one preform that extends in a direction perpendicular to a cut line to form a three-dimensional cellular system.
Further, the above technical effects may be achieved in some specific embodiments of the geocell system because:
-at least one rib is led through the preform for the purpose of fixing the geocell system on the slope;
the geocell system can be made up of a plurality of preforms forming system sections interconnected by ribs;
the geocell system can be made up of a plurality of preforms forming system sections interconnected by ultrasonic welding or metal clips;
geocell systems can be prepared in which the cells can be filled with a filling (for example sand and/or coarse gravel, and/or peat-sand mixtures, and/or concrete);
the geocell system is also equipped with a support made of geotextile material.
The invention is described in conjunction with the appended drawings, in which:
figure 1 shows a preform suitable for making a weldless geocell system;
FIG. 2 shows a general view of a cut made in a preform;
FIGS. 3-5 illustrate various variations of the cut-out region in the preform;
figure 6 shows a solderless geocell system (preform extended).
The claimed preform (figure 1) for manufacturing a weldless geocell system is made of a sheet 1 of flexible material, in particular polymeric material, fabric based on chemical fibres (carbon fibres, glass fibres) or other type of material. The sheet 1 has cut-outs 2 (fig. 1) for forming the cells. These incisions 2 consist of a central portion 3 in the form of a straight line and two ends 4 in the form of an arcuate line which ensures that the ends of the incisions 2 are rounded (rotated) (figures 2-5).
Such a configuration enables an optimal redistribution of the load in the geocell system in the end area of the cut and, as a result, an increase in the tensile strength of the system.
In one embodiment of the system described above, the end portion 4 is prepared so as to enable a 90 ° rotation of the cut, i.e. has a section perpendicular to the central portion 3 at the end of the end portion. However, other variations are possible for the orientation of the ends of the incisions 2.
The central portions 3 of the incisions 2 are arranged in rows (R)1，R2，...RN) The incision lines in adjacent rows are staggered (offset) in the incision direction (fig. 1). Preferably, the ends of the slits are all oriented to the same side.
Preferably, the end 4 of the incision 2 has a thickened area 5 (fig. 3). These thickened regions 5 can have a circular or oval shape in plan view (in longitudinal section).
Other shape variations are also possible.
In a preferred embodiment, the preform also has an additional thickened region 6 in the region of the central portion 3 of the incision 2.
These thickened areas 6 can be shaped as edges running in the direction of the central part 3 of the incision (fig. 4) or as solid rectangles in plan view (fig. 5). The thickness of the sheet material in the thickened areas may be up to 300% of the thickness of the sheet material in the other areas.
These thickened areas (5, 6) ensure additional reinforcement of the area where the incisions 2 are located, thus increasing the tensile strength of the geocell system.
The central portions 3 of the cuts (except those at the edges of the sheet) have the same length L and are in each row (R)1，R2，…RN) Arranged with the same distance S between the ends of adjacent slits (in the longitudinal direction), and in adjacent rows (R)1，R2，…RN) The cuts (in the transverse direction) are arranged with the same distance D between them. The relation S/L-K1 with values of K1 ranging from 0.1 to 0.5, most preferably from 0.3 to 0.35, and the relation D/L-K2 with values of K2 ranging from 0.1 to 0.7.
The coefficients K1 and K2 are selected from the above ranges according to the specifics of the geocell system application. For example, if the claimed geocell system is used to reinforce a slope having a slope angle of 45 °, the factor K2 should be equal to 0.7, and if used to reinforce a slope having a slope angle of 30 °, the factor K2 should be equal to 0.2.
Preferably, the end portions 4 of the slits 2 protrude with respect to the central portion 3 by a distance equal to the length L1 (fig. 1), L1 ranging from 1/10L to 1/15L.
In a preferred embodiment of the invention, the sheet material 1 is provided with additional holes 7 (fig. 1, 6) for ribs for fixing the geocell system in an extended state, for example on a slope. The holes 7 for the ribs are lined up (R)1，R2，…RN) Are arranged between the slits 2. Thickened areas 8 shaped as rounded edges can be prepared around these holes.
Further, the sheet 1 may also have drainage holes 8 (fig. 6) for draining water from the soil reinforced by the geocell system.
In a particular embodiment, the sheet 1 of flexible material may be additionally reinforced in the areas 9 with high-strength threads, for example made of aramid (for example Kevlar, SVM) or Carbon (Carbon) or other fibers, to increase the strength of the preform in the transverse and longitudinal directions, which allows the geocell system to be uniformly reinforced because there are no welds therein that are not reinforced.
Further, the surface of the preform sheet material 1 may be textured to improve the adhesion of the geocell system to soil.
Preferably, the cuts 2 in the sheet material 1 can be made by laser cutting techniques which can further strengthen the above-mentioned system due to the melting of the cut edges and thus eliminate micro-damage on the edges. In addition, the notch 2 may be prepared by punching with a punch.
The sheet of prefabricated elements for transport can be rolled up into a two-layer roll (fig. 6) together with the geotextile material as support 11 of the geocell system, which has small folds enabling it to stretch when the strip is stretched, in such a way that it can become completely smooth after the geocell system has been stacked on a slope.
The above-mentioned geocell system is manufactured by stretching (preferably without plastic deformation) one or more of the above-mentioned preforms in a direction perpendicular to the line of cuts 2, forming a three-dimensional cellular structure, wherein the cells of the geocell system formed when stretching the above-mentioned preforms are connected by a neck 10 (fig. 6). The ends of the system should be anchored to the soil using anchors. If multiple preforms are used (i.e. multiple sections of the geocell system), the last holes 4 in adjacent sections are aligned with each other and the ribs are pulled through the holes, thereby connecting the adjacent sections and simultaneously securing the geocell system. The segments may also be connected to each other by ultrasonic welding, metal clips or other connectors.
Depending on the application of the system, the cells may be filled with various fillers such as sand, coarse gravel, peat-sand mixtures, concrete, etc.
The use of the proposed prefabricated structure and geocell system made therefrom enables the following advantages to be achieved:
reducing the degree of washout of the system filling, which is particularly important when reinforcing slopes;
the possibility of using geocell systems in new applications requiring high performance, such as ramps and abutment cones on rails and motor vehicle roads, facilities for protecting pipes and earth embankments, for river bank stabilization, etc.;
significantly better drainage capacity of the system;
lower installation costs of the system;
the geocell system can raise the slope by the step thus formed if the cells are filled with concrete;
further, the geocell system can also be used as an information or advertising space.
It should be noted that the specific embodiments described in this specification are not intended to limit the claimed invention. Any additional modifications are possible without departing from the general technical characteristics set forth.
Claims (28)
1. Preform for manufacturing a weldless geocell system, made of a sheet (1) of flexible material, wherein cuts (2) are made having a central portion (3) in the form of a straight line and two end portions (4) in the form of arcuate lines ensuring the end portions (4) to become rounded, wherein the end portions (4) are all oriented to the same side, the central portion (3) of the cuts (2) being in a row (R)1，R2，...RN) Arranged and cut in adjacent rowsThe mouth lines are staggered along the direction of the incisions.
2. Preform according to claim 1, wherein at the end (4) of the cut (2) there is a thickened area (5), the preform thickness in the thickened area (5) being up to 300% of the body thickness of the sheet material.
3. Preform according to claim 1, wherein said end portions (4) are prepared so as to enable the cut (2) to be rotated by 90 ° with respect to said central portion.
4. Preform according to claim 1, made of a sheet of polymeric material or a fabric based on chemical fibres.
5. Preform according to claim 2, wherein the thickened area (5) at the end of the cut is circular or elliptical in shape in plan view.
6. Preform according to claim 2, comprising an additional thickened area (6) made in the area where the central portion (3) of the cut (2) is located.
7. Preform according to claim 6, wherein the preform thickness in the additional thickened area (6) is up to 300% of the body thickness of the sheet material (1).
8. The preform of claim 1 formed into a strip.
9. Preform according to claim 1, wherein the sheet material (1) is reinforced with a wire or a mesh.
10. The preform of claim 9, wherein the reinforcement is made with aramid or carbon wire.
11. Preform according to any one of claims 1-10, wherein the central portions (3) of the slits (2) have the same length L.
12. Preform according to claim 11, wherein in one row (R)1，R2，...RN) Is prepared so that the distance between the ends thereof is S, the ratio S/L is equal to K1, and the value of K1 ranges from 0.1 to 0.5.
13. Preform according to claim 11, wherein in adjacent rows (R)1，R2，...RN) Is prepared at a distance D from each other, the ratio D/L is equal to K2, and the value of K2 ranges from 0.1 to 0.7.
14. Preform according to claim 11, wherein said ends (4) of said slits (2) protrude with respect to said central portion (3) by a length L1, L1 ranging from 1/10L to 1/15L.
15. Preform according to claim 1, wherein additional holes (7) for the ribs are prepared for fixing the geocell system in the extended state on the slope.
16. Preform according to claim 15, wherein said additional holes (7) for the ribs are located in the same row (R)1，R2，...RN) Between adjacent incisions (2).
17. Preform according to claim 15, wherein a thickened area is produced around the additional holes (7), the preform thickness in the thickened area being up to 300% of the bulk thickness of the sheet material.
18. Preform according to any one of claims 1-10, wherein additional drainage holes are made.
19. The preform of any of claims 1-10, wherein the sheet material is textured.
20. Preform according to any one of claims 1-10, wherein the cut is made by laser cutting or punching.
21. The preform of claim 12, wherein the value of K1 ranges from 0.3 to 0.35.
22. A weldless geocell system, comprising at least one preform according to any one of claims 1-20, which extends along a direction perpendicular to the line of the central portion (3) of the cut (2) to form a three-dimensional honeycomb structure.
23. The weldless geocell system of claim 22, wherein at least one tendon is introduced through the preform for securing the system on a slope.
24. The weldless geocell system of claim 23, being made from a plurality of the preforms interconnected by the at least one tendon forming a plurality of sections of the system.
25. The weldless geocell system of claim 22, being made from a plurality of the preforms interconnected by ultrasonic welding or metal clips that form sections of the system.
26. The weldless geocell system of any of claims 22-25, wherein the cells of the geocell system are filled with a filler.
27. The weldless geocell system of claim 26, wherein the fill is sand and/or coarse gravel, and/or a peat-sand mixture, and/or concrete.
28. The weldless geocell system of any of claims 22-25, further comprising a support body (11) made of a geotextile material.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RU2015148005 | 2015-11-09 | ||
| RU2015148005/03A RU2601642C1 (en) | 2015-11-09 | 2015-11-09 | Seamless geogrid with cellular structure to reinforce soil and blank for its production |
| PCT/RU2016/000008 WO2017082762A1 (en) | 2015-11-09 | 2016-01-15 | Seamless geotextile web with cellular structure for soil stabilization, and blank for producing same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108350675A CN108350675A (en) | 2018-07-31 |
| CN108350675B true CN108350675B (en) | 2021-06-29 |
Family
ID=57278055
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201680065599.4A Active CN108350675B (en) | 2015-11-09 | 2016-01-15 | Weldless three-dimensional geocell system for soil stabilization and prefabricated member for preparing same |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP3375938B1 (en) |
| CN (1) | CN108350675B (en) |
| BR (1) | BR112018009300B1 (en) |
| CA (1) | CA3002797C (en) |
| HU (1) | HUE054603T2 (en) |
| RU (1) | RU2601642C1 (en) |
| WO (1) | WO2017082762A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2664556C1 (en) * | 2017-07-11 | 2018-08-21 | Сергей Юрьевич Никонов | Blank for cellular bulk non-welded seamless geogrid |
| RU2664555C1 (en) * | 2017-07-11 | 2018-08-21 | Сергей Юрьевич Никонов | Blank for cellular bulk non-welded seamless geogrid |
| RU186059U1 (en) * | 2018-10-24 | 2018-12-28 | Общество с ограниченной ответственностью "ПРЕСТОРУСЬ" | GEORETIC CONNECTOR |
| RU2700359C1 (en) * | 2018-12-21 | 2019-09-16 | Общество с ограниченной ответственностью "Мики" | Volumetric geogrid for strengthening slopes |
| WO2020125913A1 (en) * | 2018-12-21 | 2020-06-25 | Общество с ограниченной ответственностью "Мики" | Three-dimensional geogrid for reinforcing slopes |
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| RU2136817C1 (en) * | 1999-01-20 | 1999-09-10 | Егоров Александр Витальевич | Grate of cellular structure for stabilizing ground surface |
| CN2398334Y (en) * | 1999-09-10 | 2000-09-27 | 王迎春 | Cellular lattice structure made of plastic sheet for preventing loss of soil and water |
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| RU72989U1 (en) * | 2007-12-29 | 2008-05-10 | Закрытое акционерное общество "ПРЕСТО-РУСЬ" | DEVICE FOR PROTECTING INDUSTRIAL AREAS FROM FLOODING, STRAIN WATER AND SPRING FLOOD |
| RU84393U1 (en) * | 2009-02-16 | 2009-07-10 | Общество с ограниченной ответственностью "Юган геоматериалы" | DEVELOPMENT OF ROAD CLOTHES |
| RU122393U1 (en) * | 2012-05-17 | 2012-11-27 | Общество с ограниченной ответственностью "НПО" Промкомпозит" | DRAINAGE GEOCOMPOSITE MATERIAL (DRAINAGE MAT) |
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| RU2579090C2 (en) * | 2014-05-21 | 2016-03-27 | Общество с ограниченной ответственностью "Мики" | Innovative seamless geogrid mesh structure for soil reinforcement, method and storage for its reception |
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2015
- 2015-11-09 RU RU2015148005/03A patent/RU2601642C1/en active
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2016
- 2016-01-15 CN CN201680065599.4A patent/CN108350675B/en active Active
- 2016-01-15 WO PCT/RU2016/000008 patent/WO2017082762A1/en unknown
- 2016-01-15 HU HUE16864648A patent/HUE054603T2/en unknown
- 2016-01-15 BR BR112018009300-9A patent/BR112018009300B1/en active IP Right Grant
- 2016-01-15 EP EP16864648.7A patent/EP3375938B1/en active Active
- 2016-01-15 CA CA3002797A patent/CA3002797C/en active Active
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| RU2136817C1 (en) * | 1999-01-20 | 1999-09-10 | Егоров Александр Витальевич | Grate of cellular structure for stabilizing ground surface |
| CN2398334Y (en) * | 1999-09-10 | 2000-09-27 | 王迎春 | Cellular lattice structure made of plastic sheet for preventing loss of soil and water |
| WO2002013991A1 (en) * | 2000-08-17 | 2002-02-21 | Industrial Origami, Inc. | Method for precision bending of a sheet of material and slit sheet therefor |
| CN2536651Y (en) * | 2001-10-29 | 2003-02-19 | 中国石化北京燕化石油化工股份有限公司塑料分公司 | Geotechnic grid on slope |
| WO2008105879A1 (en) * | 2007-03-01 | 2008-09-04 | Prs Mediterranean Ltd. | Welding process and geosynthetic products thereof |
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| CN104358266A (en) * | 2014-12-08 | 2015-02-18 | 北京东方园林股份有限公司 | Method for repairing geocells and side slopes |
Also Published As
| Publication number | Publication date |
|---|---|
| HUE054603T2 (en) | 2021-09-28 |
| RU2601642C1 (en) | 2016-11-10 |
| CA3002797C (en) | 2021-03-23 |
| EP3375938A1 (en) | 2018-09-19 |
| CA3002797A1 (en) | 2017-05-18 |
| EP3375938A4 (en) | 2019-04-10 |
| WO2017082762A1 (en) | 2017-05-18 |
| CN108350675A (en) | 2018-07-31 |
| BR112018009300B1 (en) | 2022-08-02 |
| BR112018009300A2 (en) | 2018-11-06 |
| BR112018009300A8 (en) | 2019-02-26 |
| EP3375938B1 (en) | 2021-04-21 |
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