EP3699397A1 - Wasserdichtes abdecksystem zum abdecken einer oberfläche, einer zivilen struktur und entsprechendes verfahren zum herstellen eines wasserdichten abdecksystems - Google Patents
Wasserdichtes abdecksystem zum abdecken einer oberfläche, einer zivilen struktur und entsprechendes verfahren zum herstellen eines wasserdichten abdecksystems Download PDFInfo
- Publication number
- EP3699397A1 EP3699397A1 EP19382130.3A EP19382130A EP3699397A1 EP 3699397 A1 EP3699397 A1 EP 3699397A1 EP 19382130 A EP19382130 A EP 19382130A EP 3699397 A1 EP3699397 A1 EP 3699397A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- coating layer
- anchoring means
- phosphate
- retaining plate
- geotextile
- Prior art date
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000011247 coating layer Substances 0.000 claims abstract description 118
- 238000004873 anchoring Methods 0.000 claims abstract description 66
- 239000004746 geotextile Substances 0.000 claims abstract description 48
- 229920001059 synthetic polymer Polymers 0.000 claims abstract description 40
- 239000011248 coating agent Substances 0.000 claims abstract description 27
- 238000000576 coating method Methods 0.000 claims abstract description 27
- 238000011065 in-situ storage Methods 0.000 claims abstract description 15
- 239000007787 solid Substances 0.000 claims abstract description 14
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 27
- 239000000945 filler Substances 0.000 claims description 27
- 239000003063 flame retardant Substances 0.000 claims description 27
- 229910019142 PO4 Inorganic materials 0.000 claims description 18
- WOURXYYHORRGQO-UHFFFAOYSA-N Tri(3-chloropropyl) phosphate Chemical compound ClCCCOP(=O)(OCCCCl)OCCCCl WOURXYYHORRGQO-UHFFFAOYSA-N 0.000 claims description 18
- ZQKXQUJXLSSJCH-UHFFFAOYSA-N melamine cyanurate Chemical compound NC1=NC(N)=NC(N)=N1.O=C1NC(=O)NC(=O)N1 ZQKXQUJXLSSJCH-UHFFFAOYSA-N 0.000 claims description 18
- 239000000203 mixture Substances 0.000 claims description 18
- 239000010452 phosphate Substances 0.000 claims description 18
- DQWPFSLDHJDLRL-UHFFFAOYSA-N triethyl phosphate Chemical compound CCOP(=O)(OCC)OCC DQWPFSLDHJDLRL-UHFFFAOYSA-N 0.000 claims description 18
- 239000007788 liquid Substances 0.000 claims description 15
- 239000012948 isocyanate Substances 0.000 claims description 12
- 229920000768 polyamine Polymers 0.000 claims description 12
- 229920005862 polyol Polymers 0.000 claims description 12
- 150000003077 polyols Chemical class 0.000 claims description 12
- OWICEWMBIBPFAH-UHFFFAOYSA-N (3-diphenoxyphosphoryloxyphenyl) diphenyl phosphate Chemical compound C=1C=CC=CC=1OP(OC=1C=C(OP(=O)(OC=2C=CC=CC=2)OC=2C=CC=CC=2)C=CC=1)(=O)OC1=CC=CC=C1 OWICEWMBIBPFAH-UHFFFAOYSA-N 0.000 claims description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 10
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 10
- 229910021502 aluminium hydroxide Inorganic materials 0.000 claims description 10
- 239000010439 graphite Substances 0.000 claims description 10
- 229910002804 graphite Inorganic materials 0.000 claims description 10
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims description 10
- 239000000347 magnesium hydroxide Substances 0.000 claims description 10
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims description 10
- 239000004114 Ammonium polyphosphate Substances 0.000 claims description 9
- 235000019826 ammonium polyphosphate Nutrition 0.000 claims description 9
- 229920001276 ammonium polyphosphate Polymers 0.000 claims description 9
- 150000002513 isocyanates Chemical class 0.000 claims description 9
- 239000012188 paraffin wax Substances 0.000 claims description 9
- 229920000642 polymer Polymers 0.000 claims description 9
- VEORPZCZECFIRK-UHFFFAOYSA-N 3,3',5,5'-tetrabromobisphenol A Chemical compound C=1C(Br)=C(O)C(Br)=CC=1C(C)(C)C1=CC(Br)=C(O)C(Br)=C1 VEORPZCZECFIRK-UHFFFAOYSA-N 0.000 claims description 5
- BQPNUOYXSVUVMY-UHFFFAOYSA-N [4-[2-(4-diphenoxyphosphoryloxyphenyl)propan-2-yl]phenyl] diphenyl phosphate Chemical compound C=1C=C(OP(=O)(OC=2C=CC=CC=2)OC=2C=CC=CC=2)C=CC=1C(C)(C)C(C=C1)=CC=C1OP(=O)(OC=1C=CC=CC=1)OC1=CC=CC=C1 BQPNUOYXSVUVMY-UHFFFAOYSA-N 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 claims description 5
- CMQUQOHNANGDOR-UHFFFAOYSA-N 2,3-dibromo-4-(2,4-dibromo-5-hydroxyphenyl)phenol Chemical compound BrC1=C(Br)C(O)=CC=C1C1=CC(O)=C(Br)C=C1Br CMQUQOHNANGDOR-UHFFFAOYSA-N 0.000 claims description 4
- 239000011796 hollow space material Substances 0.000 claims description 4
- 239000012943 hotmelt Substances 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 238000001125 extrusion Methods 0.000 claims description 3
- 239000004745 nonwoven fabric Substances 0.000 claims description 3
- 229920000162 poly(ureaurethane) Polymers 0.000 claims description 3
- 229920002635 polyurethane Polymers 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
- 239000010410 layer Substances 0.000 description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 238000010276 construction Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000011378 shotcrete Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 238000004078 waterproofing Methods 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 229920003020 cross-linked polyethylene Polymers 0.000 description 1
- 239000004703 cross-linked polyethylene Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
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- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
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- 238000000465 moulding Methods 0.000 description 1
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Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
- E21D11/383—Waterproofing; Heat insulating; Soundproofing; Electric insulating by applying waterproof flexible sheets; Means for fixing the sheets to the tunnel or cavity wall
Definitions
- the invention relates to the area of the waterproof covering of structures in civil works.
- the invention relates to a waterproof covering system for covering a surface comprising: a geotextile, with a first face intended to be applied on said surface and a second face opposite to said first face, a geogrid, comprising a plurality of fibres intertwined with each other, said plurality of fibres being connected at their intersection zones, and said geogrid being arranged on said second face of said geotextile.
- the invention further relates to a civil structure covered with the waterproof covering system of the invention.
- the invention further relates to a method for forming a waterproof covering system for covering a surface that comprises the steps of: providing a geotextile, with a first face and a second face opposite to said first face, and applying said geotextile on said surface, providing a geogrid, comprising a plurality of fibres intertwined with each other, said plurality of fibres being connected at their intersection zones, and arranging said geogrid on said second face of said geotextile.
- conventional tunnels are waterproofed by way of projecting a first coating layer of shotcrete, i. e. a layer of concrete projected at a high velocity against the surface to be covered.
- This layer already provides a good waterproof covering due to the low porosity reached on the material once it has cured.
- a covering layer is made from a plurality of crosslinked polyethylene panels attached to the shotcrete layer. This kind of panels is easy to adapt to the irregularities of the tunnel wall.
- a waterproof covering system for covering a surface of the type indicated at the beginning characterized in that it further comprises a plurality of anchoring means, each anchoring means of said plurality of anchoring means comprising: a nailing member for nailing said anchoring means on said surface through said geotextile and a retaining plate operatively associated with said nailing member, said retaining plate comprising a plurality of through holes and said retaining plate being arranged such that in the operation position of said anchoring means, when said anchoring means are nailed on said surface, said retaining plate overlaps said geogrid , and said waterproof covering system further comprising a first coating layer of synthetic polymer continuous coating that from a liquid state in which said synthetic polymer is applied by in situ projection to cover said second face of said geotextile, said geogrid and said anchoring means, said first coating layer is cured to a solid
- said layer when the system comprises only the first coating layer, said layer has a mean thickness comprised between 0.7 and 3.2 mm and especially preferably between 0.8 and 2.5 mm.
- the waterproof covering system of the invention Several advantages are achieved by the waterproof covering system of the invention.
- the first coating layer of synthetic polymer can penetrate in the holes and provide retention for the first coating layer of polymer. Once the first coating layer is cured, a positive fit connection between the first coating layer and the anchoring means is achieved. Therefore, even if this first coating layer of coating is applied by projection, the layer holds its position forming a solid unit with the geogrid and the geotextile.
- the waterproof covering system is continuous, i.e. it has no joints.
- the coating is continuous. This prevents water from dripping down the outer face of the system, i.e. the face opposite to the covered surface. The water can then be prevented from dripping out the coating and therefore it can be drained towards the most convenient place of the surface that has been covered.
- a drainage pipe or canal system can be installed in functional cooperation with the coating. The water is collected at the lowest point of the system and thus evacuated through the drainage system.
- the covering layer is much easier to apply than the panels. This layer is simply projected over the geotextile and the geogrid in a very fast manner.
- said plurality of fibres of said geogrid are connected at their intersection zones in order to achieve a higher stiffness of the geogrid.
- the invention further includes a number of preferred features that are object of the dependent claims and the utility of which will be highlighted hereinafter in the detailed description of an embodiment of the invention.
- said geotextile is a nonwoven fabric, punched having a first face which is raw and a second face smoothed by hot melt, and the geotextile has a grammage greater than 150 g/m 2 and preferably greater than 200 g/m 2 .
- the smoothed surface in combination with the indicated grammages provides for a better adhesion of the first coating layer on to the geotextile.
- the geogrid 8 and the geotextile 2 are bonded together building a single unit for better mechanical resistance.
- said plurality of fibres has a tensile strength greater than 30 kN.
- said plurality of fibres comprises a plurality of polymer bars interlaced by extrusion. This allows the geogrid to work as a unit or block.
- the fibres of the geogrid are oriented in a first and a second directions, said first and second directions being perpendicular to one another.
- said first covering synthetic polymer is a polyurea or polyurethane applicable by projection.
- said retaining plate is a circular disc, and said plurality of holes are evenly distributed on the surface of said disc and with their axes of symmetry perpendicular to the surface of the disc.
- the retaining plate can have other shapes such as a cross, a square a triangle or the like.
- the retaining plate comprises a peripheral rim that in the operation position of said anchoring means, said rim creates a hollow space between said retaining plate and said geotextile. This improves the entrance of liquid polymer under the retaining plate and creates a better positive fit connection, i.e. the coating adopts the shape of the plate thus avoiding the first coating layer to be easily separated from the system.
- said first coating layer of synthetic polymer is a mixture of a first and a second components, said first component being one or more of the group formed by a polyol and a polyamine and said second component being an isocyanate, and said first and second components have a ratio of 1:1 v/v.
- This combination of materials and mixing ratio has shown to provide a good continuity and resistance of this layer. In some applications, for example when the system must be hold against its own weight or when it is subject to tensile loads, a bad connection between this first layer, and the geotextile and the anchoring means could cause a notably shortening of the service life of the coating system.
- the mixture of first coating layer further comprises a flame retardant filler.
- said flame retardant filler is one or more of the group formed by expandable graphite, aluminium hydroxide, magnesium hydroxide, ammonium polyphosphate, trialkyl-phosphate, triaryl-phosphate, chlorinated paraffin, melamine cyanurate (MC), tris(chloropropyl)phosphate (TCPP), triethyl phosphate (TEP), tetrabromobisphenol .
- the system further comprises a second coating layer of synthetic polymer forming a continuous coating that from a liquid state in which said synthetic polymer is applied by in situ projection to cover said first coating layer, said second coating layer is cured to a solid state, said second coating layer of synthetic polymer coating is a mixture of a third and a fourth components, said third component being one or more of the group formed by a polyol and a polyamine and said fourth component being an isocyanate, said third and fourth components of said second coating layer are mixed in a ratio of 2.5 to 4 : 1 v/v and said second coating layer further comprising a flame retardant filler, said flame retardant filler being one or more of the group formed by expandable graphite, aluminium hydroxide, magnesium hydroxide, ammonium polyphosphate, trialkyl-phosphate, triaryl-phosphate, chlor
- the third and fourth components of said second coating layer are mixed in a ratio of 2.9 to 3.1 : 1 v/v.
- the mean thickness of the first and the second coating layers together is comprised between 0.7 and 3.2 mm and especially preferably between 0.8 and 2.5 mm.
- the first coating layer is between 40% and 60% of the thickness of the ranges given above.
- the invention also relates to method for forming a waterproof covering system for covering a surface as described above.
- the method of the invention solves the problem of providing a continuous covering of the surface leading to improved waterproof properties to the surface which is to be covered. Furthermore, the covering is easy to install and is reliable.
- the method further comprises the steps of: providing a plurality of anchoring means, each anchoring means of said plurality of anchoring means comprising: a nailing member for nailing said anchoring means on said surface through said geotextile and a retaining plate operatively associated with said nailing member, said retaining plate comprising a plurality of through holes, nailing each nailing member with its corresponding retaining plate of said plurality of anchoring means such that in the operation position of said anchoring means said retaining plate overlaps said geogrid and said method further comprising the steps of forming a first coating layer of synthetic polymer continuous coating that, from a liquid state in which said synthetic polymer is applied by in situ projection to cover said second face of said geotextile said geogrid and said anchoring means, said first coating layer is cured to a solid state to provide a positive fit connection between said first coating layer and said plurality of through holes of each of said anchoring means.
- said first coating layer of synthetic polymer is a mixture of a first and a second components, said first component being one or more of the group formed by a polyol and a polyamine and said second component being an isocyanate, and said first and second components are mixed in a ratio of 1:1 v/v.
- said mixture of first coating layer further comprises a flame retardant filler
- said flame retardant filler is one or more of the group formed by expandable graphite, aluminium hydroxide, magnesium hydroxide, ammonium polyphosphate, trialkyl-phosphate, triaryl-phosphate, chlorinated paraffin, melamine cyanurate (MC), tris(chloropropyl)phosphate (TCPP), triethyl phosphate (TEP), tetrabromobisphenol .
- the method further comprises the steps of mixing a second coating layer of synthetic polymer from of a third and a fourth components, said third component being one or more of the group formed by a polyol and a polyamine and said fourth component being an isocyanate, said third and fourth components of said second coating layer are mixed in a ratio of 2.5 to 4 : 1 v/v, adding a flame retardant filler to said second coating layer, said flame retardant filler being one or more of the group formed by expandable graphite, aluminium hydroxide, magnesium hydroxide, ammonium polyphosphate, trialkyl-phosphate, triaryl-phosphate, chlorinated paraffin, melamine cyanurate (MC), tris(chloropropyl)phosphate (TCPP), triethyl phosphate (TEP), tetrabromobisphenol A (TBPP-A), resorcinol bis (diphenyl phosphate) (RDP) or bis
- FIGS 1 to 3 show an embodiment of the waterproof covering system 1 according to the invention.
- This kind of covering system can be used in on several types of surfaces. However, it is especially interesting for applications in which water must be drained in a controlled manner, such as for example tunnels, road slopes or the like.
- Figures 1 to 3 show the most relevant elements of the covering system in its most general form. These are a geotextile 2, a geogrid 8, anchoring means 10 and a first coating layer 18 covering all the previous elements and the covered surface.
- the geotextile 2 has a first face 4 which is intended to be applied on the surface which must be covered and a second face 6 opposite to the first face 4.
- the geotextile 2 is a nonwoven fabric which is punched.
- the first face 4 is raw, in other words it is not smoothed, while de second face 6 is smoothed by hot melt.
- the geotextile 2 has a grammage greater than 150 g/m 2 . In this case, the geotextile shown has a grammage greater than 200 g/m 2 .
- the next layer of the system is a geogrid 8.
- the geogrid 8 has a plurality of fibres intertwined with each other.
- the geogrid 8 is arranged on the second face 6 of the geotextile 2.
- the geogrid 8 and the geotextile 2 are bonded together building a single unit.
- the distance between fibres of the geogrid shown is of 32x32 mm, that is the separation between longitudinal and crosswise fibers.
- the plurality of fibres comprises a plurality of polymer bars interlaced by extrusion.
- the fibres have a preferred tensile strength greater than 30 kN in any of the linear direction of the fibres.
- the geogrid 8 is made of polypropilene. However other embodiments and materials are also possible.
- the fibres of the geogrid 8 are oriented in first and second directions L, P.
- Figure 1 shows that the fibres are arranged in a first direction L which is longitudinal, and a second direction P which is perpendicular to the longitudinal direction.
- the fibres of the first and second directions can be arranged crosswise forming angles different to 90o relative to each other.
- the geogrid 8 can be formed from a plurality of plastic fibres in the shape of first and second bands or strips. These strips are thus arranged in at least two different non parallel directions.
- This plurality of first and second bands can be connected to each other, e.g. by hot melt, in their intersection zones.
- An example of this embodiment can be seen in Figure 12 or else in Figure 13 .
- the system further has a plurality of anchoring means 10.
- Each of the anchoring means 10 comprises a nailing member 12 and a retaining plate 14.
- the nailing member 12 is an elongated metal spike, preferably made of steel or stainless steel.
- the nailing member 12 can also have a screw section in order for the nailing member 12 to be screwed into the surface.
- the nailing member 12 is nailed or screwed through the geotextile 2 in order to provide a better holding of the system to the surface to cover.
- the retaining plate 14 is also a steel or stainless steel plate.
- the retaining plate 14 is a disc shaped cylindrical plate with a central protrusion 32.
- the retaining plate 14 has eight circular through holes 16. These holes 16 are evenly distributed on the surface 30 of the disc. However, if desired they must not be at the same angle or radial distance. Further, as it is apparent from Figure 10 , the axes of symmetry of the holes 16 are perpendicular to the surface 30.
- the retaining plate 14 is preferably produced by stamping. Alternatively, it could also be produced by moulding or eventually machining.
- the retaining plate 14 has a central hole 22 provided in the centre of the protrusion 32. This central hole 22 allows to operatively associate the retaining plate 14 with the nailing member 12.
- the retaining plate 14 has also a peripheral rim 24.
- the rim 24 together with the protrusion 32, create a hollow space 28 between the retaining plate 14 and the geotextile 2.
- this hollow space 28 below the retaining plate 24 allows the first covering layer to penetrate the retaining plate 14 for improving the holding of the surface layers of the system.
- the retaining plate 24 of this embodiment has 52 mm of diameter with 8 through holes of 8 mm of diameter each. On the other hand, it has 2 mm thickness and a rim of 4 mm thickness. In a preferred embodiment, the rim can also have several recesses for better penetration of the first covering layer 18.
- Figure 1 shows how, when the nailing member 12 is inserted in the central hole 22 of the retaining plate 14, the anchoring means 10 can be arranged such that in its operation position, the retaining plate 14 overlaps the fibres of the geogrid 8, thus providing much better hold for the geotextile 2 and the geogrid 8 to the covered surface.
- the covering system 1 has the first coating layer 18 of synthetic polymer forming a continuous coating.
- this first coating layer 18 is projected in situ in a liquid state in which the synthetic polymer covers the second face 6 of the geotextile 2, the geogrid 8 and the anchoring means 10.
- the first coating layer 18 is made of synthetic polymer such as a polyurea or polyurethane.
- the first covering layer 18 is thus continuous and without joints or noticeable irregularities.
- the first coating layer is 2 mm thick. From this liquid state, the first coating layer 18 is cured to a solid state. This to provide a positive fit connection between the first coating layer 18 and the retaining plate 14 of each of the anchoring means 10. This provides an especially reliable waterproof barrier with an excellent mechanical resistance.
- the first covering layer 18 is made of a mixture of a first and a second components.
- the first component is one or more of the group formed by a polyol and a polyamine.
- the second component is an isocyanate.
- the first and second components are mixed in a ratio of 1:1 v/v.
- the covering systems of tunnels need to fulfil several functions in relation to fire.
- the covering of tunnels fulfils the so called UNE norm no. UNE-EN 13501-2:2009+A1:2010.
- Tunnels have to fulfil level B s2 - d0 of this norm.
- the coating layer must be self-extinguishing (B), producing a certain maximum amount of smoke (s2) and not causing drops of burning coating to drip down the tunnel walls.
- the mixture of first coating layer 18 further comprises a flame retardant filler.
- This flame retardant filler is one or more of the group formed by expandable graphite, aluminium hydroxide, magnesium hydroxide, ammonium polyphosphate, trialkyl-phosphate, triaryl-phosphate, chlorinated paraffin, melamine cyanurate (MC), tris(chloropropyl)phosphate (TCPP), triethyl phosphate (TEP), tetrabromobisphenol .
- Figure 4 shows an alternative embodiment of the invention, also having fireproof properties. This solution maintains the advantages of the invention regarding the load capacity of the first coating layer 18. However, in this case, the first coating layer 18 is free of frame retardant filler. This first coating layer 18 in now only 1 mm thick.
- the waterproof covering system 1 further comprises a second coating layer 20 of synthetic polymer forming a continuous coating of 1 mm of thickness.
- the second coating layer 20 is applied on the surface in a liquid state by in situ projection to cover the first coating layer 18.
- the first coating layer 18 is already cured, before the second coating layer 20 is applied. After the projection the said second coating layer 20 is cured to a solid state.
- the second coating layer 20 of synthetic polymer coating is a mixture of a third and a fourth components.
- the third component is one or more of the group formed by a polyol and a polyamine.
- the fourth component is an isocyanate.
- the second coating layer 20 further comprises a flame retardant filler.
- this flame retardant filler is, e.g. expandable graphite, aluminium hydroxide, magnesium hydroxide, or other components already cited above.
- the third and fourth components of said second coating layer 20 are mixed in a ratio of 3:1 v/v. These exemplary proportions have shown to provide a good balance between projectability, adhesion and mechanical performance when the environmental conditions make the application of a single first coating layer with fireproof properties.
- This second coating layer 20 even if having the flame retardant filler has a viscosity of 6500 ⁇ 500 Mpas and a density of about 1.44 kg/litre.
- Figures 6 to 7 show an first example of civil structure 100 according to the invention.
- the civil structure 100 is a tunnel with a tunnel wall 102.
- the tunnel wall 102 shown in the Figures is pure rock. Therefore, the covering system 1 can be applied directly. However, in some applications, a prior shotcrete layer can be applied in order to stabilize the wall of the civil structure.
- the geotextile 2 with a first face 4 and a second face 6 opposite to the first face 4 is applied on the tunnel wall 102.
- the geogrid 8 having a plurality of fibres intertwined with each other, said plurality of fibres being connected at their intersection zones, is arranged on the second face 6 of said geotextile 2. It is important to say that it is preferable that the geotextile 2 and the geogrid 8 form a single unit. This simplifies dramatically the application of these two layers. However, this is not compulsory and could also be separate parts being applied the one after the other.
- anchoring means 10 comprising: a nailing member 12 for nailing the anchoring means 10 on the tunnel wall by perforating the geotextile 2 and the retaining plate 14 operatively associated with the nailing member 12.
- the retaining plates 14 comprise a plurality of through holes 16.
- each nailing member 12 with its corresponding retaining plate 14 is nailed to the tunnel wall 102 such that in the operation position of the anchoring means 10 the retaining plate 14 overlaps at least one of the plurality of fibres of the geogrid.
- the synthetic polymer is applied by in situ projection to cover the second face 6 of the geotextile 2, said geogrid 8 and the anchoring means 10.
- Figure 3 showing the relevance that the first coating layer penetrates each of the retaining plates 14 of each anchoring means 10. Thanks to the through holes 16 and the peripheral rim 24, the first coating layer 18 in liquid state flows below each retaining plate such that the anchoring means 10 are embedded within this first coating layer 18.
- the first coating layer 18 is cured to a solid state to provide a positive fit connection between said first coating layer 18 and the retaining plate 14 of each of the anchoring means 10. This notably impacts on the right holding of the system 1 to the wall 102. This step is shown in Figure 7 .
- the d first coating layer 18 of synthetic polymer is a mixture of a first and a second components, the first component being one or more of the group formed by a polyol and a polyamine and the second component being an isocyanate.
- the first and second components are mixed in a ratio of 1:1 v/v.
- the mixture of first coating layer 18 further comprises a flame retardant filler of the type described before.
- Figures 8 and 9 show an alternative embodiment to the tunnel of Figures 6 and 7 .
- the first coating layer 18 is free of flame retardant fillers.
- the method has the step of mixing a second coating layer 20 of synthetic polymer from of a third and a fourth components.
- the third component is one or more of the group formed by a polyol and a polyamine.
- the fourth component is an isocyanate.
- the third and fourth components of said second coating layer 20 are mixed in a ratio of 3:1 v/v.
- a flame retardant filler is added to the second coating layer 20.
- the second coating layer 20 of synthetic polymer is formed as a continuous coating from a liquid state.
- the synthetic polymer is applied by in situ projection to cover said first coating layer 18. Finally, this second layer 20 is cured to a solid state. This is shown in Figure 8 .
- This embodiment is especially adapted to the environments in which the polymer has more difficulties to flow due to the addition of the flame retardant filler.
- Figure 9 shows the effect of the suction when a vehicle such as a train drives through the tunnel 100.
- the covering system 1 can deform.
- the covering system 1 remains in the position.
- the covering system moves by the action of the external loads, such as suction forces of the vehicle passing through the tunnel, the system moves as a unit.
- Figures 11 and 12 show another alternative embodiment of the retaining plate 14 of the anchoring means 10.
- the retaining plate 24 is cross shaped.
- the retaining plate 24 is made of steel sheet of 2 mm thickness, for example by mould pressing.
- the width of the cross is 102 mm and comprises 24 through holes of 8 mm of diameter.
- the ends of the cross arms are provided with a peripheral rim 24 to allow the first coating layer to easily embed the anchoring systems within itself.
- Figure 12 shows how the arms of the cross shaped retaining plate 14 overlap the fibres of the geogrid 8.
- Figure 13 shows a third embodiment of the system according to the invention based on the embodiment of Figures 4 and 5 .
- the geogrid 8 is be formed from a plurality of plastic fibres in the shape of first and second bands or strips.
- the first coating layer 18 is free of flame retardant.
- This second coating layer 20 does not solve the main problem of the invention, which is to provide a waterproof covering system for a surface with an improved waterproofing performance but that is easier to install and that is thus less expensive.
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Laminated Bodies (AREA)
- Lining And Supports For Tunnels (AREA)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES19382130T ES2901408T3 (es) | 2019-02-22 | 2019-02-22 | Sistema de revestimiento impermeable para revestir una superficie, estructura civil y procedimiento correspondiente para formar un sistema de revestimiento impermeable |
EP19382130.3A EP3699397B1 (de) | 2019-02-22 | 2019-02-22 | Wasserdichtes abdecksystem zum abdecken einer oberfläche, einer zivilen struktur und entsprechendes verfahren zum herstellen eines wasserdichten abdecksystems |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP19382130.3A EP3699397B1 (de) | 2019-02-22 | 2019-02-22 | Wasserdichtes abdecksystem zum abdecken einer oberfläche, einer zivilen struktur und entsprechendes verfahren zum herstellen eines wasserdichten abdecksystems |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3699397A1 true EP3699397A1 (de) | 2020-08-26 |
EP3699397B1 EP3699397B1 (de) | 2021-09-01 |
Family
ID=65763404
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19382130.3A Active EP3699397B1 (de) | 2019-02-22 | 2019-02-22 | Wasserdichtes abdecksystem zum abdecken einer oberfläche, einer zivilen struktur und entsprechendes verfahren zum herstellen eines wasserdichten abdecksystems |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP3699397B1 (de) |
ES (1) | ES2901408T3 (de) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001007756A1 (en) * | 1999-07-23 | 2001-02-01 | William Claudio Bona | Lining system |
US6761504B1 (en) * | 1998-07-20 | 2004-07-13 | Mbt Holding Ag | Waterproof cladding construction and method of providing the same |
ES2393876A1 (es) * | 2012-10-23 | 2012-12-28 | Krypton Chemical S.L. | Disposición de geomembrana de aislamiento de una superficie y procedimiento de aislamiento correspondiente |
WO2013192257A1 (en) * | 2012-06-20 | 2013-12-27 | Swarny Mark | Liner system for mines, tunnels and other ground structures |
-
2019
- 2019-02-22 EP EP19382130.3A patent/EP3699397B1/de active Active
- 2019-02-22 ES ES19382130T patent/ES2901408T3/es active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6761504B1 (en) * | 1998-07-20 | 2004-07-13 | Mbt Holding Ag | Waterproof cladding construction and method of providing the same |
WO2001007756A1 (en) * | 1999-07-23 | 2001-02-01 | William Claudio Bona | Lining system |
WO2013192257A1 (en) * | 2012-06-20 | 2013-12-27 | Swarny Mark | Liner system for mines, tunnels and other ground structures |
ES2393876A1 (es) * | 2012-10-23 | 2012-12-28 | Krypton Chemical S.L. | Disposición de geomembrana de aislamiento de una superficie y procedimiento de aislamiento correspondiente |
Also Published As
Publication number | Publication date |
---|---|
ES2901408T3 (es) | 2022-03-22 |
EP3699397B1 (de) | 2021-09-01 |
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