EP3375938B1 - Weld-free three-dimensional geocell system for soil stabilisation and preform for producing same - Google Patents
Weld-free three-dimensional geocell system for soil stabilisation and preform for producing same Download PDFInfo
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- EP3375938B1 EP3375938B1 EP16864648.7A EP16864648A EP3375938B1 EP 3375938 B1 EP3375938 B1 EP 3375938B1 EP 16864648 A EP16864648 A EP 16864648A EP 3375938 B1 EP3375938 B1 EP 3375938B1
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- Prior art keywords
- preform
- incisions
- preform according
- thickened areas
- thickness
- Prior art date
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- 239000002689 soil Substances 0.000 title description 6
- 230000006641 stabilisation Effects 0.000 title description 4
- 239000000463 material Substances 0.000 claims description 39
- 210000004027 cell Anatomy 0.000 claims description 13
- 210000002435 tendon Anatomy 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 9
- 239000004576 sand Substances 0.000 claims description 7
- 239000000945 filler Substances 0.000 claims description 5
- 239000004746 geotextile Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 4
- 239000004760 aramid Substances 0.000 claims description 3
- 229920003235 aromatic polyamide Polymers 0.000 claims description 3
- 210000003850 cellular structure Anatomy 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 239000004744 fabric Substances 0.000 claims description 2
- 230000002787 reinforcement Effects 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 5
- 230000003014 reinforcing effect Effects 0.000 description 3
- 238000011105 stabilization Methods 0.000 description 3
- 239000013590 bulk material Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000003698 laser cutting Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 229920000271 Kevlar® Polymers 0.000 description 1
- IUHFWCGCSVTMPG-UHFFFAOYSA-N [C].[C] Chemical compound [C].[C] IUHFWCGCSVTMPG-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000004761 kevlar Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 210000003739 neck Anatomy 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
Classifications
-
- 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
Definitions
- the invention relates to the construction industry, namely, to geocell systems, and may be used for reinforcing water basin shorelines and beds, slopes, embankment cones, retaining walls in oil-and gas, transport, hydraulic engineering and other fields of construction, where geocells should have high and stable parameters of strength and endurance.
- GEOWEB geocell for slope stabilization which is made of polymer strips interconnected in a staggered order with a preset pitch along their transverse ribs and fixed on a slope in their stretched state so as to form rhomboid cells (see, RU Patent No. 2152479 , E02D17/20, 2000).
- a geocell system which is formed by strips of a polymeric material arranged on a polymeric base so as to form cells for confinement of a bulk material, which walls are partially bent in the direction opposite to that of a slope grade (see: CH Patent No. 652155 , E02D17/20, 1985).
- the known geocell designs for stabilization of soil structures cannot fully achieve the objective of fixing a material on a slope due to possible shift of such geocells down the slope under the influence of its filling material both during infilling a material into its cells and during the operation after infilling said material into cells, wherein said filling material being a peat-sand mixture, coarse gravel, or a combination of various bulk materials; in the result, a preset slope profile may be lost due to filling material accumulation at its base.
- a preform for a stretched geocell system is known in the art that is made of a sheet material wherein slots of a segmental shape are made in rows, adjacent rows being offset relative to each other (see: RU Patent No. 2090702 , 20.09.1997). Said slots may be provided with stretching said preform for forming a three-dimensional cellular structure
- a drawback of this preform is that plastic deformation of the sheet material occurs when it is stretched, which may result in non-equivalent strength of the geocell system.
- thicknesses of walls i.e., distances between the edges of neighboring slots
- stresseses are concentrated in thinner parts of the walls, which reduces tensile strength of this geocell.
- the closest analog of the claimed invention is a sheet preform, a weld-free web geocell system produced therefrom, as well as a method for producing said geocell system that are all described in the Prior Art section of RU Patent No. 2090702 , 20.09.1997.
- This preform is made in the form of a polymeric sheet having slots that are offset relative to each other.
- a weld-free geocell system can be produced by stretching this preform.
- a drawback of this closest analog is also a low tensile strength of a geocell, since stresses are concentrated at the ends of said slots during stretching.
- JP-S-55142609 discloses a preform according to the preamble of claim 1. None of said prior art documents disclose a preform and method of its use according to the present invention which is set out in the appended claims. The objective of the present invention is to eliminate drawbacks of the prior art solutions.
- the technical effect consists in improving tensile strength of a geocell system and reducing labor-intensiveness of producing it.
- a preform intended for forming a weld-free geocell due to that it is made of a flexible sheet material provided with incisions having the central portion in the form of a straight line and two end portions in the form of an arc, said central portions of the incisions being arranged in rows, the incision lines in the neighboring rows being offset along the incision direction, the end portions of the incisions being provided with thickened areas, and the preform thickness in said thickened areas being up to 300% of the thickness of the main body of a sheet material.
- a weld-free geocell system that comprises at least one said preform stretched in the direction perpendicular to the incision lines so as to form a three-dimensional cellular system.
- the claimed preform for producing a weld-free geocell system ( Fig. 1 ) is made of a sheet of a flexible material (1), in particular a polymeric material, a fabric based on chemical fibers (carbon fibers, glass fibers) or another type of material.
- the sheet (1) is provided with incisions 2 ( Fig. 1 ) for forming cells.
- These incisions (2) consist of a central portion (3) in the form of a straight line and two end portions (4) in the form of an arcuate lines that ensure rounding (turn) of the ends of the incisions (2) ( Figs. 2-5 ).
- This configuration enables the most optimal redistribution of loads in a geocell system in the area of incision end portions, and, in the result, improves the system tensile strength.
- the end portions (4) are made so as to enable turn of the incisions by 90°, i.e., the end portion has at its end a section that is perpendicular to the central portion (3).
- the central portions (3) of the incisions (2) are arranged in rows (R 1 , R 2 , ...R N ), the incision lines in the neighboring rows being offset in the incision direction ( Fig. 1 ).
- the incision end portions are oriented toward one side.
- the end portions (4) of the incisions (2) are provided with thickened areas (5) ( Fig. 3 ). These thickened areas (5) may have the circular or oval shape in the plane view (in the longitudinal section).
- the preform may be provided with additional thickened areas (6) located in the area of the central portion (3) of the incision (2).
- These thickened areas (6) may be shaped as a rim going along the direction of the central portion (3) of the incision ( Fig. 4 ) or as a solid rectangle in the plane view ( Fig. 5 ).
- the sheet thickness in the thickened areas may be up to 300% of the thickness of the sheet material in the other areas.
- the central portions (3) of the incisions (except for those at the sheet edges) have the same length L and are disposed at the same distance S between the ends of the adjacent incisions in every row (R 1 , R 2 , ...R N ) (in the longitudinal direction) and at the same distance D between the incisions of adjacent rows (R 1 , R 2 , ...R N ) (in the transverse direction).
- S/L K1
- the K1 value ranging from 0.1 to 0.5, most preferably from 0.3 to 0.35
- D/L K2
- the K2 value ranging from 0.1 to 0.7.
- the coefficients K1 and K2 are selected from the above ranges, depending on particular conditions of the geocell system application. For example, if the claimed geocell system is used for reinforcing a slope with the gradient angle of 45°, the coefficient K2 should be equal to 0.7; for slopes with the gradient angle of 30° the coefficient K2 should be equal to 0.2.
- the end portions (4) of the incisions (2) project by the distance equal to the length L1 relative to the central portion (3) ( Fig. 1 ), L1 ranging from 1/10L to 1/15L.
- the sheet material 1 is provided with additional holes (7) for tendons ( Fig. 1 , 6 ) that are intended for fixing a geocell system in the stretched state on, for example, a slope.
- the holes (7) for tendons are arranged on the rows (R 1 , R 2 , ...R N ) between the incisions (2). Thickened areas (8) shaped as circular rims may be made around these holes.
- the sheet 1 may be also provided with drainage holes (8) ( Fig. 6 ) that are intended for draining water from the soil reinforced with the geocell system.
- the sheet (1) of a flexible material may be additionally reinforced in the areas (9) with high-strength threads, e.g., made of aramid (e.g., Kevlar, SVM) or carbon (Carbon) or other fibers that increase the preform strength in the transverse and longitudinal directions, which makes the geocell system uniformly strengthened due to the absence of unreinforced welds therein.
- high-strength threads e.g., made of aramid (e.g., Kevlar, SVM) or carbon (Carbon) or other fibers that increase the preform strength in the transverse and longitudinal directions, which makes the geocell system uniformly strengthened due to the absence of unreinforced welds therein.
- the surface of the preform sheet material (1) may be made textured in order to improve the adhesion of the geocell system to soil.
- the sheet (1) may be made of a color polymeric material, which enables to use the stretched geocell system for advertising or information purposes.
- the incisions (2) in the sheet material (1) can be made by a laser cutting technique, which can further strengthen the system due to melting of the cut edge and, thereby, eliminate micro damages on the edge.
- the incisions (2) may be made by notching by means of a punch.
- a preform sheet intended for transportation may be reeled together with a geotextile material serving as the support (11) for the geocell system into a two-layer roll ( Fig. 6 ), the geotextile material having small folds enabling it to stretch, when a strip is stretched, in such a way that it would be completely smoothed after the geocell system is layered on a slope.
- the geocell system may be produced from one or more said preforms by stretching (preferably, without plastic deformation) in the direction perpendicular to the lines of the incisions (2) for forming a three-dimensional cellular structure wherein the cells of the geocell system, as formed during stretching of the preform, are connected by means of necks (10) ( Fig. 6 ).
- the ends of the system should be fixed on soil with the use of anchors. If several preforms (i.e. sections of the geocell system) are used, the last holes 4 in the adjacent sections are aligned with each other, and tendons are drawn therethrough, thus connecting adjacent sections and, at the same time, fixing the geocell system. Sections may be also interconnected by ultrasonic welding, metal clips or other connectors.
- its cells may be infilled with various fillers, such as sand, coarse gravel, peat-sand mixture, concrete, etc.
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
- Moulding By Coating Moulds (AREA)
Description
- The invention relates to the construction industry, namely, to geocell systems, and may be used for reinforcing water basin shorelines and beds, slopes, embankment cones, retaining walls in oil-and gas, transport, hydraulic engineering and other fields of construction, where geocells should have high and stable parameters of strength and endurance.
- The prior art discloses GEOWEB geocell for slope stabilization, which is made of polymer strips interconnected in a staggered order with a preset pitch along their transverse ribs and fixed on a slope in their stretched state so as to form rhomboid cells (see,
RU Patent No. 2152479 - Also, one knows a geocell system which is formed by strips of a polymeric material arranged on a polymeric base so as to form cells for confinement of a bulk material, which walls are partially bent in the direction opposite to that of a slope grade (see:
CH Patent No. 652155 - One knows a geocell system which is made of a polymeric material with rhomboid cells formed by perforated polymeric strips when this geocell system is stretched, cell positions on a slope being fixed with anchors, and the cells themselves are filled with a bulk material (see:
JP Patent No. 56016730 - The known geocell designs for stabilization of soil structures cannot fully achieve the objective of fixing a material on a slope due to possible shift of such geocells down the slope under the influence of its filling material both during infilling a material into its cells and during the operation after infilling said material into cells, wherein said filling material being a peat-sand mixture, coarse gravel, or a combination of various bulk materials; in the result, a preset slope profile may be lost due to filling material accumulation at its base.
- A preform for a stretched geocell system is known in the art that is made of a sheet material wherein slots of a segmental shape are made in rows, adjacent rows being offset relative to each other (see:
RU Patent No. 2090702 - The closest analog of the claimed invention is a sheet preform, a weld-free web geocell system produced therefrom, as well as a method for producing said geocell system that are all described in the Prior Art section of
RU Patent No. 2090702 - Geocells made from welded polymeric strips are known from
US 2015/0225908 A1 andWO 2008/105879 A1 .JP-S-55142609 claim 1. None of said prior art documents disclose a preform and method of its use according to the present invention which is set out in the appended claims. The objective of the present invention is to eliminate drawbacks of the prior art solutions. - The technical effect consists in improving tensile strength of a geocell system and reducing labor-intensiveness of producing it.
- The above technical effect is achieved in a preform intended for forming a weld-free geocell due to that it is made of a flexible sheet material provided with incisions having the central portion in the form of a straight line and two end portions in the form of an arc, said central portions of the incisions being arranged in rows, the incision lines in the neighboring rows being offset along the incision direction, the end portions of the incisions being provided with thickened areas, and the preform thickness in said thickened areas being up to 300% of the thickness of the main body of a sheet material.
- Furthermore, the above technical effect is achieved in particular embodiments of the preform due to that:
- the end portions are capable to rotate the incisions by 90° relative to the central portion,
- the preform is made of a polymeric material,
- the thickened areas at the end portions of the incisions are shaped as a circle or an oval,
- the preform has additional thickened areas made in the area of the incision central portions,
- the preform thickness in said additional thickened areas is up to 300% of the thickness of the main body of a sheet material,
- the preform is made in the form of a strip,
- a sheet material is reinforced with a thread or mesh,
- an aramid or carbon thread is used for reinforcement,
- the incision central portions have the same length L,
- neighboring central portions of incisions in a row (R1, R2, ...RN) are arranged at a distance S between their ends, and the ratio S/L = K1, where K1 is from 0.1 to 0.5, preferably from 0.3 to 0.35,
- central portions of incisions in neighboring rows (R1, R2, ...RN) are arranged at a distance D from each other, and the ratio D/L = K2, where K2 is from 0.1 to 0.7,
- the incision end portions project by a distance L1 relative to the central portion, L1 being from 1/10L to 1/15L,
- the preform is provided with additional holes for tendons used for attaching a geocell system in the stretched state to a slope,
- the additional holes for tendons are arranged between the neighboring incisions in a row (R1, R2, ...RN),
- thickened areas are made around the additional holes, the preform thickness in these areas being up to 300% of the thickness of the main body of a sheet material,
- the preform is provided with drainage holes,
- the sheet material is made textured,
- the incisions are made by a laser cutting or notching.
- The above technical effect can be achieved by a weld-free geocell system that comprises at least one said preform stretched in the direction perpendicular to the incision lines so as to form a three-dimensional cellular system.
- Furthermore, the above technical effect can be achieved in particular embodiments of the geocell system due to that:
- at least one tendon is drawn through the preform for the purpose of fixing the geocell system on a slope,
- the geocell system can be composed of several said preforms forming the system sections that are interconnected by said tendon,
- the geocell system can be composed of several said preforms forming the system sections that are interconnected by ultrasonic welding or metal clips,
- the geocell system may be made with the possibility of filling its cells with fillers, such as sand and/or coarse gravel, and/or peat-sand mixture, and/or concrete,
- the geocell system is also provided with a support made of a geotextile material.
- The invention is explained by the accompanying drawings, wherein:
-
Fig. 1 shows a preform suitable for producing a weld-free geocell system; -
Fig. 2 shows a general view of an incision made in a preform, -
Figs. 3-5 show variants of incision areas in a preform, -
Fig. 6 shows a weld-free geocell system (the preform is stretched). - The claimed preform for producing a weld-free geocell system (
Fig. 1 ) is made of a sheet of a flexible material (1), in particular a polymeric material, a fabric based on chemical fibers (carbon fibers, glass fibers) or another type of material. The sheet (1) is provided with incisions 2 (Fig. 1 ) for forming cells. These incisions (2) consist of a central portion (3) in the form of a straight line and two end portions (4) in the form of an arcuate lines that ensure rounding (turn) of the ends of the incisions (2) (Figs. 2-5 ). - This configuration enables the most optimal redistribution of loads in a geocell system in the area of incision end portions, and, in the result, improves the system tensile strength.
- In one embodiment of the system, the end portions (4) are made so as to enable turn of the incisions by 90°, i.e., the end portion has at its end a section that is perpendicular to the central portion (3). However, other variants are also possible for orienting the ends of an incision (2). The central portions (3) of the incisions (2) are arranged in rows (R1, R2, ...RN), the incision lines in the neighboring rows being offset in the incision direction (
Fig. 1 ). Preferably, the incision end portions are oriented toward one side. - The end portions (4) of the incisions (2) are provided with thickened areas (5) (
Fig. 3 ). These thickened areas (5) may have the circular or oval shape in the plane view (in the longitudinal section). - Other variants of shapes are also possible.
- In one preferable embodiment, the preform may be provided with additional thickened areas (6) located in the area of the central portion (3) of the incision (2).
- These thickened areas (6) may be shaped as a rim going along the direction of the central portion (3) of the incision (
Fig. 4 ) or as a solid rectangle in the plane view (Fig. 5 ). The sheet thickness 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 strengthening in the area of the incision (2), thus improving tensile strength of a geocell system.
- The central portions (3) of the incisions (except for those at the sheet edges) have the same length L and are disposed at the same distance S between the ends of the adjacent incisions in every row (R1, R2, ...RN) (in the longitudinal direction) and at the same distance D between the incisions of adjacent rows (R1, R2, ...RN) (in the transverse direction). The relationship S/L = K1, the K1 value ranging from 0.1 to 0.5, most preferably from 0.3 to 0.35; and the relationship D/L = K2, the K2 value ranging from 0.1 to 0.7.
- The coefficients K1 and K2 are selected from the above ranges, depending on particular conditions of the geocell system application. For example, if the claimed geocell system is used for reinforcing a slope with the gradient angle of 45°, the coefficient K2 should be equal to 0.7; for slopes with the gradient angle of 30° the coefficient K2 should be equal to 0.2. Preferably, the end portions (4) of the incisions (2) project by the distance equal to the length L1 relative to the central portion (3) (
Fig. 1 ), L1 ranging from 1/10L to 1/15L. - In preferable embodiments of the invention, the
sheet material 1 is provided with additional holes (7) for tendons (Fig. 1 ,6 ) that are intended for fixing a geocell system in the stretched state on, for example, a slope. The holes (7) for tendons are arranged on the rows (R1, R2, ...RN) between the incisions (2). Thickened areas (8) shaped as circular rims may be made around these holes. - Furthermore, the
sheet 1 may be also provided with drainage holes (8) (Fig. 6 ) that are intended for draining water from the soil reinforced with the geocell system. - In one particular embodiment, the sheet (1) of a flexible material may be additionally reinforced in the areas (9) with high-strength threads, e.g., made of aramid (e.g., Kevlar, SVM) or carbon (Carbon) or other fibers that increase the preform strength in the transverse and longitudinal directions, which makes the geocell system uniformly strengthened due to the absence of unreinforced welds therein.
- Furthermore, the surface of the preform sheet material (1) may be made textured in order to improve the adhesion of the geocell system to soil.
- The sheet (1) may be made of a color polymeric material, which enables to use the stretched geocell system for advertising or information purposes.
- Preferably, the incisions (2) in the sheet material (1) can be made by a laser cutting technique, which can further strengthen the system due to melting of the cut edge and, thereby, eliminate micro damages on the edge. Also, the incisions (2) may be made by notching by means of a punch.
- A preform sheet intended for transportation may be reeled together with a geotextile material serving as the support (11) for the geocell system into a two-layer roll (
Fig. 6 ), the geotextile material having small folds enabling it to stretch, when a strip is stretched, in such a way that it would be completely smoothed after the geocell system is layered on a slope. - The geocell system may be produced from one or more said preforms by stretching (preferably, without plastic deformation) in the direction perpendicular to the lines of the incisions (2) for forming a three-dimensional cellular structure wherein the cells of the geocell system, as formed during stretching of the preform, are connected by means of necks (10) (
Fig. 6 ). The ends of the system should be fixed on soil with the use of anchors. If several preforms (i.e. sections of the geocell system) are used, thelast holes 4 in the adjacent sections are aligned with each other, and tendons are drawn therethrough, thus connecting adjacent sections and, at the same time, fixing the geocell system. Sections may be also interconnected by ultrasonic welding, metal clips or other connectors. - Depending on the application of the system, its cells may be infilled with various fillers, such as sand, coarse gravel, peat-sand mixture, concrete, etc.
- The use of the proposed preform structure and a geocell system produced therefrom enables to achieve the following advantages:
- a reduced degree of washing out of the system filler, what is especially important when reinforcing slopes,
- expanded possibilities for using the geocell system for new applications requiring higher performance, e.g., on slopes and in cones of bridges on rail and motor roads, in protection facilities of pipelines and soil embankments, for bank stabilization, etc.,
- improved strength of the system in comparison with three-dimensional geocell systems produced by welding of polymeric strips,
- significantly higher draining capability of the system,
- lower mounting costs of the system,
- if cells are to be infilled with concrete, the geocell system may be used for ascending a slope by using steps thus formed,
- furthermore, it is also possible to use the geocell system as an information or advertising space.
Claims (25)
- A preform for producing a weld-free geocell system, said preform being made of a sheet of a flexible material (1), comprising incisions (2) whereby- said incisions (2) have a central portion (3) in the form of a straight line and two end portions (4) in an arcuate form,- the central portions (3) of said incisions (2) being arranged in rows (R1, R2, ...RN), wherein the incision lines in the neighboring rows being offset along the incision direction, characterized in that- thickened areas (5) are made at the end portions (4) of the incisions (2), the preform thickness in said thickened areas (5) being up to 300% of the thickness of the main body of the sheet material (1).
- The preform according to Claim 1, wherein the end portions (4) are made so as to be capable of turning the incisions (2) by 90° relative to the central portion.
- The preform according to Claim 1, being made of a sheet of a polymeric material or a fabric based on chemical fibers.
- The preform according to Claim 1, wherein the thickened areas (5) at the end portions (4) of the incisions (2) are shaped as a circle or an oval in the plane view.
- The preform according to Claim 4, comprising additional thickened areas (6) made in the area where the central portions (3) of the incisions (2) are located.
- The preform according to Claim 5, wherein the thickness of the preform in said additional thickened areas (6) is up to 300% of the thickness of the main body of the sheet material (1).
- The preform according to Claim 1, being made as a strip.
- The preform according to Claim 1, wherein the sheet material (1) is reinforced with a thread or a mesh.
- The preform according to Claim 8, wherein an aramid or carbon thread is used for reinforcement.
- The preform according to any one of Claims 1-9, wherein the central portions (3) of the incisions (2) have a same length L.
- The preform according to Claim 10, wherein the neighboring central portions (3) of the incisions (2) in a row (R1, R2, ...RN) are made at a distance S between their ends, the ratio S/L being equal to K1, and a K1 value ranging from 0.1 to 0.5, preferably from 0.3 to 0.35.
- The preform according to Claim 10, wherein the central portions (3) of the incisions (2) in the neighboring rows (R1, R2, ...RN) are made at a distance D from each other, the ratio D/L being equal to K2, and a K2 value ranging from 0.1 to 0.7.
- The preform according to Claim 10, wherein the end portions (4) of the incisions (2) project to a length L1 relative to the central portion (3), L1 ranging from 1/10L to 1/15L.
- The preform according to Claim 1, wherein said preform comprises additional holes (7) for tendons for the purpose of fixing a geocell system in its stretched state on a slope.
- The preform according to Claim 14, wherein said additional holes (7) for tendons are located between the neighboring incisions (2) in a row (R1, R2, ...RN).
- The preform according to Claim 14, further comprising thickened areas around the additional holes (7), the thickness in said thickened areas being up to 300% of the thickness of the main body of the sheet material (1).
- The preform according to any one of Claims 1-9, wherein said preform comprises additional drainage holes.
- The preform according to any one of Claims 1-9, wherein the sheet material is textured material.
- The preform according to any one of Claims 1-9, wherein said incisions are laser cutted incisions or notches.
- A method comprisingi) providing a weld-free geocell system, comprising at least one preform according to any one of Claims 1-19; andii) stretching it in a direction perpendicular to the lines of the central portions (3) of the incisions (2) thereby forming a three-dimensional cellular structure.
- The method according to Claim 20, further comprising the step of drawing at least one tendon through the preform for the purpose of fixing the system on a slope.
- The method according to Claim 21, further comprising the step of interconnecting several said preforms forming sections of the system by means of said tendon.
- The method according to Claim 20, further comprising the step of interconnecting several said preforms forming sections of the system by means of ultrasonic welding or metal clips.
- The method according to any one of Claims 20-23, further comprising the step of filling the cells with fillers, wherein said fillers are preferably sand and/or coarse gravel, and/or peat-sand mixture, and/or concrete.
- The method according to any one of Claims 20-23, said method comprising the addition of a support (11) to said weld-free geocell system, wherein said support (11) is of a geotextile material.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
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 (3)
Publication Number | Publication Date |
---|---|
EP3375938A1 EP3375938A1 (en) | 2018-09-19 |
EP3375938A4 EP3375938A4 (en) | 2019-04-10 |
EP3375938B1 true EP3375938B1 (en) | 2021-04-21 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP16864648.7A Active EP3375938B1 (en) | 2015-11-09 | 2016-01-15 | Weld-free three-dimensional geocell system for soil stabilisation and preform for producing same |
Country Status (7)
Country | Link |
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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 |
WO2020125913A1 (en) * | 2018-12-21 | 2020-06-25 | Общество с ограниченной ответственностью "Мики" | Three-dimensional geogrid for reinforcing slopes |
RU2700359C1 (en) * | 2018-12-21 | 2019-09-16 | Общество с ограниченной ответственностью "Мики" | Volumetric geogrid for strengthening slopes |
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EP3147412A1 (en) * | 2014-05-21 | 2017-03-29 | Obshchestvo S Ogranichennoy Otvetstvennostyu "Miki" | Seamless geotextile web with cellular structure for soil stabilization |
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RU2090702C1 (en) * | 1996-03-01 | 1997-09-20 | Юрий Андреевич Аливер | Stretchable geograting |
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US6481259B1 (en) * | 2000-08-17 | 2002-11-19 | Castle, 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 |
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-
2015
- 2015-11-09 RU RU2015148005/03A patent/RU2601642C1/en active
-
2016
- 2016-01-15 CA CA3002797A patent/CA3002797C/en active Active
- 2016-01-15 WO PCT/RU2016/000008 patent/WO2017082762A1/en unknown
- 2016-01-15 CN CN201680065599.4A patent/CN108350675B/en active Active
- 2016-01-15 HU HUE16864648A patent/HUE054603T2/en unknown
- 2016-01-15 EP EP16864648.7A patent/EP3375938B1/en active Active
- 2016-01-15 BR BR112018009300-9A patent/BR112018009300B1/en active IP Right Grant
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JPS55142609A (en) * | 1979-04-24 | 1980-11-07 | Sekisui Chem Co Ltd | Manufacture of lath net |
EP3147412A1 (en) * | 2014-05-21 | 2017-03-29 | Obshchestvo S Ogranichennoy Otvetstvennostyu "Miki" | Seamless geotextile web with cellular structure for soil stabilization |
Also Published As
Publication number | Publication date |
---|---|
WO2017082762A1 (en) | 2017-05-18 |
RU2601642C1 (en) | 2016-11-10 |
EP3375938A1 (en) | 2018-09-19 |
CN108350675A (en) | 2018-07-31 |
BR112018009300A2 (en) | 2018-11-06 |
HUE054603T2 (en) | 2021-09-28 |
CA3002797A1 (en) | 2017-05-18 |
BR112018009300B1 (en) | 2022-08-02 |
EP3375938A4 (en) | 2019-04-10 |
BR112018009300A8 (en) | 2019-02-26 |
CN108350675B (en) | 2021-06-29 |
CA3002797C (en) | 2021-03-23 |
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