EP1971753A1 - Protection anticorrosion pour des éléments d ancrage dans la roche - Google Patents

Protection anticorrosion pour des éléments d ancrage dans la roche

Info

Publication number
EP1971753A1
EP1971753A1 EP06818966A EP06818966A EP1971753A1 EP 1971753 A1 EP1971753 A1 EP 1971753A1 EP 06818966 A EP06818966 A EP 06818966A EP 06818966 A EP06818966 A EP 06818966A EP 1971753 A1 EP1971753 A1 EP 1971753A1
Authority
EP
European Patent Office
Prior art keywords
anchor
envelope
adhesive
welding
armature
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP06818966A
Other languages
German (de)
English (en)
Inventor
Svein Jonsson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Skumtech AS
Original Assignee
Skumtech AS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from PCT/EP2006/006358 external-priority patent/WO2007006428A2/fr
Application filed by Skumtech AS filed Critical Skumtech AS
Priority to EP06818966A priority Critical patent/EP1971753A1/fr
Priority claimed from PCT/EP2006/011590 external-priority patent/WO2007062871A1/fr
Publication of EP1971753A1 publication Critical patent/EP1971753A1/fr
Withdrawn legal-status Critical Current

Links

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
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
    • E21D21/0013—Protection against corrosion

Definitions

  • the invention relates to corrosion protection for anchors in the mountains.
  • Ankertechnik in the mountains in particular for shotcrete construction with foil seal.
  • Shotcrete construction is used in particular for underground spaces such as tunnels or tunnels or pipelines to be laid in the mountains.
  • tunnels, tunnels or pipelines are waterproofed. Sealing problems also exist in construction pits or in foundation shafts and basement shafts.
  • foil seals are often used.
  • the foil seal can be enclosed on both sides in the shotcrete. But it can also be arranged on one side.
  • the film seal may be arranged outside the shotcrete in order to seal against ingress of water.
  • the film seal may be disposed inwardly of the shotcrete to prevent any sewage or other liquid present at an exit.
  • the shotcrete can be applied in one or more layers.
  • the underground application has different variants:
  • a first shotcrete layer is brought onto the rock outcrop.
  • the first shotcrete layer is used in essential of the sealing of the mountain breakout.
  • the film seal is laid on the first shotcrete layer.
  • the laying of the film seal is usually carried out in tracks that need to be attached to the mountains or on the shotcrete layer.
  • the webs are successively laid so that they overlap at the edges and complement the desired seal. At the overlapping edges a welding of the webs is provided.
  • To attach the tracks is provided that initially anchors are introduced into the mountains. The foil seal can be pierced by the anchors when subsequently sealing leaks.
  • the flanges can be done by means of two flanges, of which at least one seals at the same time with the film. This happens, for example, by forming the flange as a neoprene disk.
  • the flanges should clamp the film between them.
  • the anchors make the composite to the mountains and hold the concrete reinforcement with the shotcrete rublange, which allows the inner shotcrete construction and stabilized.
  • the concrete reinforcement is usually made of steel, for example in the form of reinforcing steel mesh mats.
  • the shotcrete residue is formed by DE-3244000 by a wire mesh.
  • the wire mesh is spaced from the film at some distance and is intended to prevent the impact of shotcrete from being reflected by the film seal.
  • the film seal is mounted at a distance from the mountains. This is done with the described anchors to which the film seal is attached. In this case, the problem of rebound of shotcrete is still greater than in the variant described above. Nevertheless, the wire mesh also helps in this case, so that with the described wire mesh technology a shotcrete expansion can be built up at a distance from the mountain eruption without further ado.
  • a mesh or wire mesh is provided between the expansion and the mountain breakout. The wire mesh is preferably used as a safeguard against rockfall from the mountains.
  • the nonwoven fabric can fulfill various tasks.
  • the nonwoven fabric fulfills various functions, namely a protective function and a drainage function.
  • DE-2400866 is also provided to first provide the nonwoven fabric with a primer before it comes to the actual order of sprayed concrete.
  • the shotcrete construction with sealing foil is expensive. There are relatively many anchors to attach the film seal. Laying the foil seal is cumbersome and requires considerable resources. The attachment of the film to the anchors requires special solutions and causes sealing problems, even if instead of the clamping flanges described above other welding or adhesive flanges can be used, where the film seal is welded or glued without perforation. In addition, measures must be taken for the shotcrete retention.
  • the wire nets intended for containment will be dispensed with. This is done by a combination of measures: a) a special design of the film seal b) certain attachment points for the film seal c) certain shotcrete application
  • anchor rods are used, if only the mountain outbreak must be secured.
  • boulders with a risk of escape are secured with an anchor.
  • the anchors penetrate the boulders and reach into the solid rock behind.
  • the same solution is used on traffic routes and railway lines on which lateral rock is to be secured. It has long been recognized that the anchor rods are exposed to a strong corrosion load.
  • the corrosion load is attributed to the pollution with mountain water and to the admission of air.
  • the mountain water usually carries a considerable salt load.
  • Drilling holes are set in the rock for the anchors.
  • the anchors are mortared or cemented in the wells and / or mechanically.
  • Various mortars and adhesives are known.
  • polyester for fixing the anchor is a thermosetting resin.
  • EP in mortar composition is known for example from DE 10002605C2.
  • EP for fastening anchors from DE 19832669 A l is known.
  • dowel materials from EP 60109003 T2 known from DE. These masses can be carried in the same way in the borehole as the previous filler from polyester. The previous filling compound is pushed into wurstiger packaging in the hole. Subsequent positioning of the anchor destroys the packaging of the mixture so that the mixture fills the remaining cavity of the well around the anchor.
  • the backfilling of the borehole can also be done in other ways.
  • the mixture is withdrawn from a reservoir and pressed directly into the wellbore. Liquid mixture is pumped. Dry mixture can be injected.
  • a collar or a plug into the bore. This can be done together with the anchor.
  • the collar or plug may be a lost / permanent part or a demountable part. The collar or plug prevents the mixture from leaking.
  • the collar or plug may protrude with one part into the borehole and protrude with another part in front of the mountains to form a drip which deflects the water flowing to the anchor from the anchor and thereby significantly reduces the water load of the anchor , It is advantageous if the collar or plug is involved in the mixture that has been filled into the wellbore.
  • corresponding filling openings are provided on the collar or plug, which correspond with filler neck.
  • the collar or plug is advantageous not only for filling the mixture but also for positioning the anchor. As long as the anchor is not held by the mixture, the collar or plug can take over this task.
  • assemblers were required to hold the anchors until the polyester blend developed sufficient strength. This is exhausting, leading to a loss of time and inadequate results because fissures can open up when shaken at the anchor after adequate early strength.
  • the mounting aids eliminate these problems. Therefore, the assembly aids also irrespective of the mixture for other blends meaning.
  • the invention is also based on the object to provide a corrosion protection for the anchor.
  • the invention is based on the recognition that through the
  • Filling materials such as epoxy (EP) resins or polyester resins in the borehole provide extensive or even complete protection of the anchors from the borehole
  • the backfill material can be brought into the wellbore before or after the anchor or together with the anchor.
  • Thread corresponds to an internal thread in the clamp flanges.
  • the internal thread is very difficult to galvanize.
  • galvanic means, the zinc layer is too low.
  • the EP layer can be destroyed by screwing.
  • the invention has recognized that the threads still promote the wetting with mountain water. This also applies in the area of the internal thread of the clamping flanges.
  • a casing is provided according to the invention for corrosion protection.
  • the enclosure may be wholly or partially in the form of a tube or a sleeve or a foil or have a coating.
  • the sheath should connect directly or indirectly close to the backfill material in the borehole and connect directly or indirectly close to the plastic seal of the shotcrete construction.
  • the enclosure is according to the invention optionally a) loosely pushed onto the anchor and b) when setting the anchor in the mortar or adhesive involved and c) surrounds the anchor at the end projecting from the borehole or d) fixedly mounted on the anchor and e ) is embedded in the mortar or adhesive when placing the anchor, and f) surrounds the anchor at the end protruding from the wellbore
  • the loose arrangement allows to mount the enclosure immediately together with the anchor or to assemble only after setting the anchor. This applies both to envelopes that surround the anchors at some distance and for enclosures, which firmly enclose the anchor when applied to the anchor.
  • the foil provided for wrapping has the form of foil strips or the form of foil strips and / or in which the casing is provided with adhesive on the inside.
  • the wrapping of the anchor takes place immediately after the manufacture of the anchor or at another time prior to the installation of the anchor in the mountains.
  • a tight connection of the envelope to the filling compound or mortar or adhesive is provided in the borehole.
  • at least a slight involvement of the sheath in the filling compound or in the mortar or adhesive in the borehole is provided.
  • the envelope can also be carried much further into the borehole. The involvement can be direct or indirect. In the case of indirect connection, the covering reaches over another part into the borehole or to the filling material or the mortar or adhesive.
  • the tight connection can already be given at a penetration depth of the enclosure to 50 mm, possibly even at a penetration depth up to 100 mm.
  • Lower penetration depths are also possible if the penetration depths / overlap at the respective end is provided with a profiling which is favorable for incorporation.
  • profiling may have one or more annular elevations and / or depressions, which give a better toothing with the mortar or adhesive and / or increase the sealing effect.
  • the envelope can also reach down to the deepest.
  • the sheath may then be used to force glue and / or mortar through the space between the armature and the sheath until glue or mortar emerges from the space between the sheath and the borehole wall. This can ensure that a sufficient filling of the gap between the anchor and the borehole wall with mortar or adhesive has actually occurred.
  • a fiber reinforced plastic is provided as a fill mass in the borehole, or a sufficiently strong fabric is provided to reinforce the fill mass in the borehole. The forces acting on the anchor must be conducted via the filling mass into the mountains.
  • the envelope of the armature is formed in the area as a fabric or fabric reinforced, so that the forces acting on the anchor forces on the lying within the envelope Mörteltate. Adhesive layer can be passed and thus the forces acting on this layer forces can be passed through the sheath on the outside in the wellbore mortar or adhesive layer and are discharged from there into the mountains.
  • the sufficient filling of the gap with mortar or adhesive can be ensured without the reaching into the wellbore deepest enclosure by first so much mortar or adhesive is placed in the well that subsequent impressions of the anchor in the well an escape of mortar or glue from the space between the armature and borehole wall causes.
  • This can be achieved very advantageously with cartridges, which have a filling of mortar or adhesive and are destroyed when the anchor is inserted.
  • cartridges may consist of plastic tubing or prepared paper. The plastic tube and the paper have a small wall thickness, so that they burst easily when the anchor penetrates.
  • the envelope of the anchor is incorporated directly into the mortar or the adhesive.
  • the sleeves and collars described above can be used.
  • the collar or Häl sen are in turn connected tightly to the backfill material, in particular involved in the backfill material.
  • the cladding is connected to these sleeves or collars.
  • the sheath can be mechanically and / or connected by welding or gluing with the sleeves or collar.
  • the envelope of the anchor comprises the sleeve or collar described above on the outside.
  • the wrapper can wrap around the collar or sleeve.
  • the sleeve or the collar can wrap around the wrapper.
  • the compound is further intensified by the fact that the envelope engages with a ring-shaped projection (spring) in a groove of the sleeve or collar.
  • the sleeve or collar may be provided with an annular projection (spring) and engage in a groove of the enclosure.
  • tongue and groove are known in which the spring in the groove obtains a tight fit. Such cross-sectional shapes arise when the groove engages behind the spring and thereby a considerable resistance to loosening and an advantageous sealing effect arise.
  • the wrapper is also provided with a welding edge or adhesive edge with which a welding or gluing can be done on the sleeve or collar described above.
  • the enclosure according to the invention it is advantageous if it allows significant changes in length at the construction site. This allows different lengths of protruding from the mountains anchors ends are taken into account. With sufficient length, the whole leaves out protect the anchor hole protruding from the mountain water from the mountain water.
  • the wrapper must then protrude above the anchor end.
  • the envelope can also cover and protect these parts.
  • the cladding then juts out over this
  • the envelope is at least partially formed as a bellows.
  • the bellows can be pulled out and easily bridge significant differences in length.
  • the envelope is composed of a tube part or sleeve part and a bellows.
  • the parts are welded together.
  • the composition reduces the costs. This also applies if different sizes are reserved for different applications.
  • the wrapper may also be wholly or partially made of a foil which is placed around the anchor.
  • the film can be wound one or more times.
  • a clamping piece is provided which presses the film ends against each other and thus secures the permanent full enclosure.
  • a multiple winding is not only a double or triple or x-fold winding, but also every other winding greater than 1, ie also a 1.5 times winding, so that there is an overlap of the film ends.
  • Adhesive films can be self-adhesive. The bond can also be caused by applied adhesive layers.
  • the film width may correspond to the anchor length that is covered with the film. The film width can also be much narrower, so that the narrow film a strip or a Band forms and must be wrapped diagonally to cover the anchor at the desired length.
  • the winding and gluing opens up further structural possibilities.
  • the winding and gluing of the immediately after the production takes place.
  • the film can also form a package for the anchor.
  • connection parts are provided with a collar. Then the foil can be wound over the collar.
  • one of the parts that can be combined to form the shell is a connector for above-described fasteners used to make a shotcrete construction.
  • the connecting part is intended to comprise the mountain-side disk of the two disks, between which the membrane intended for sealing is clamped.
  • a molded part is provided, which is arranged with a flat surface between the mountain-side disc and the membrane and the bellows or the adjacent part allows a simple weld.
  • the cavity between the armature and the enclosure may still be filled with an insulating agent.
  • insulating agent particularly suitable are pumpable means.
  • fillers which are initially pumpable and then harden and fillers which remain permanently pumpable.
  • Fats and waxes may be suitable as permanently pumpable agents. Such agents have already proven themselves in connection with the rock anchors described.
  • the anchor / fastener sheath consists of a shrink material, for example a heat shrink tubing.
  • a shrink tube, shrink sleeve or shrink film of polyethylene, polyamide, polyvinylidene chloride, polyester, polypropylene is provided.
  • Others too Plastics / polyolefins / polymers are suitable for shrinking materials.
  • the manufacture of the shrink tubing is carried out by extrusion and aftertreatment.
  • the preparation and aftertreatment, in particular strong cooling freeze the resulting molecular structures. By heating and subsequent slow cooling, the molecular structures are released again, so that a strong contraction arises.
  • the shrinkage in various plastics up to a certain limit, the greater the higher the proportion of fillers.
  • the fillers include talc, chalk and fibers and others.
  • the plastics can be colored as desired.
  • the color is optionally incorporated with pigments.
  • the color pigment content can be 10%, even 25% and more.
  • seamless tubes can be extruded.
  • the extrusion die is given the shape of an annular gap.
  • the interior of the resulting extrusion tube is pressurized with compressed air or another gas. This can have different tasks.
  • the primary goal is to prevent collapse of the hose.
  • the tube inner surface would then probably at least partially stick together.
  • the compressed air can also be used to expand the hose to a certain extent.
  • the advantage of the chain straps is that the chain straps pull off the resulting extrusion tube and release it at the end of the pull-off section in order to be returned to the beginning again and again to form the cavity again and again.
  • the enclosures for the anchors / fasteners according to the invention can also be produced by injection molding.
  • the shrink tubing can be produced seamlessly by extrusion.
  • the heat shrink tubing is also made from films or webs by folding the films and webs together. Films and webs are made in recent times mainly by extruding a tube, which is then slit and spread to the film or web. Since the desired shrinking tube can be produced directly by means of the above-described extrusion, it seems unrealistic to assemble a film or web produced in a contemporary manner from an extrusion tube into a tube. However, this can be more economical than the immediate extrusion of the shrink tube.
  • the assembly / assembly of shrink tubing from films and webs can be done for small series of shrink tubing as far as possible by hand.
  • blanks can be obtained from the films and webs and placed on top of each other in order to bring about a welding at the edge.
  • the films and webs can also be folded over and initially welded before being cut.
  • a welding tongs is sufficient, are set with the relatively short welds until the desired weld length is reached.
  • the welding gun has two heated welding jaws, which are pressed against each other and enclose the two superimposed blanks / foils / sheets between them.
  • the welding jaws are electrically heated.
  • commercially available electrically heated cartridge heaters are suitable, which also have a temperature measurement in addition to the power supply.
  • the temperature measurement is carried out electrically via sensors and can be provided with little effort with a control that acts on the power supply, i. the power supply stops when the desired temperature is reached, or the power supply starts again when the desired temperature falls below again.
  • the heating cartridges can be accommodated in suitable holes in the welding jaws.
  • the heat is guided from the outside to the welding surfaces.
  • Length of the shrink tube extends.
  • Such welding machines can also be used a welding machine, as used for the above-described laying of film on the tunnel wall used.
  • Such welding machines preferably have a welding wedge, which at the same time between the two blanks / foils / webs at the Welding surfaces is guided along and transfers the heat necessary for welding by touching.
  • the edges of the blanks / films / webs are each pressed together directly behind the welding wedge with suitable pressure rollers.
  • Such welding machines are particularly suitable for straight welds.
  • the resulting hoses can be pushed onto the anchors after assembly of the anchors in the mountains, for example, before the fasteners are mounted. Subsequently, the hoses are mounted with one end on the mountain side armature or on the downhole collar and mounted with the other end on the film side of the next fastener. Optionally, the assembly is made by pushing / pulling one end over said collar and the other end over said fastener. This causes no problems if the hose and collar / fastener are sufficiently large. The game is immaterial, as long as the subsequent shrinking process still leads to a sufficient enclosure of the collar / fastener.
  • the shrinking process is initiated by heating with appropriate condition of the shrinkage material. It is expedient to start with the heating of the shrink tube at one end and then slowly go to the other end of the tube. This prevents air from becoming trapped which makes it difficult to completely enclose the armature / fastener.
  • the shrinking process can be optionally supported by applying a negative pressure. As a result, the air enclosed by the shrink tube is sucked off.
  • the negative pressure is, however, used so metered that no wrinkles formed in the tube.
  • the hoses are mounted together with the fastener or even together with the anchor.
  • only shrink films or shrink sheets are wrapped around the anchor / fasteners. It is preferably the same plastic as used for the hoses described above. With sufficient clamping of the films or wrapping the anchor / fastener there is no risk of loosening, neither in the wrap nor in the subsequent shrinking.
  • Shrink film inside to be provided with an adhesive layer are hot melt adhesives, which are required for shrinking
  • Suitable adhesives are various co-polymers.
  • the adhesives can be supplemented by a liability basis and additional corrosion protection supplements.
  • Epoxy resins acrylates and polyurethanes.
  • the acrylates Preferably, the acrylates and polyurethanes.
  • the pipe sections may overlap the bellows parts and vice versa.
  • anchors are provided on the surface with an epoxy resin (EP) layer.
  • EP coatings are known, for example, from US Pat. No. 4,285,993 having a minimum thickness of about 0.4 mm.
  • the EP layer complements very advantageously with the adhesive and the outer plastic layer, in particular a PE layer. Shrink film to insulation, which has proven in the field of natural gas pipes more than S Opilote as a multi-layer protection.
  • HDPE high anchor loads
  • a gap is initially provided between the sheath and the anchor and the sheath is then shrunk onto the anchor is due to the details of the shrinking by heat plastic material for the outer layer the cover and because of the details for bonding the inside of the outer layer reference is made to the following documents: DE 10358758A 1, DE 10353 178A 1, DE 103281 50A l, DE 103 18474A 1, DE 102005028537A 1, DE 10200527162A 1, EP04010078.
  • the enclosure according to the invention can also be used independently of the tunnel construction.
  • Fig. 1 and 2 show a shotcrete construction for a tunnel in stable mountains.
  • the mountains are designated 1.
  • threaded rods 2 have been introduced as an anchor.
  • 1 hole has been drilled in the mountains and the anchors have been glued in the mountains.
  • Figs. 3 and 4 show the attachment of the anchor.
  • the bore is first acted upon in a manner not shown with hot air. This dries the well and warms the surrounding soil.
  • hose-like container 30 are used as cartridges for attachment.
  • the containers 30 are made of a thin tubular film which has been sealed after filling a mixture 31 of epoxy adhesive / mortar at the ends.
  • the container 30 Prior to positioning the anchors in a bore, the container 30 is inserted.
  • the container is dimensioned in the exemplary embodiment so that after insertion of the anchor, the gap to the mountains is completely filled. If a container 30 is insufficient, additional containers may be used. The additional containers may also have smaller contents.
  • the armature 37 is provided in the embodiment of FIG. 4 with caterpillar-shaped or rib-shaped elevations 38 which extend obliquely to the longitudinal axis of the armature 37.
  • the anchor penetrates into the mixture 3 1 and causes a distribution of
  • the distance of the collar 40 from the mountain eruption may be larger or smaller as needed. There is a need if the bore does not have the exact predetermined length and / or if the anchor does not penetrate the predetermined amount into the bore. Then the space is more or less filled and it may be necessary to push the collar deeper into the hole until the desired integration into the mixture is formed.
  • a flexible centering ring 41 is still provided on the federal government. Task of the centering ring 41 is the centering of the armature 37 in the position shown, so that the armature 37 does not change its position when it is released.
  • the centering is advantageous because, together with the assembly, a curing of the mixture 3 1 takes place in the intermediate space 42.
  • the mixture 3 1 consists in the embodiment of EP and surcharges.
  • the mixture is cured by heating.
  • an unillustrated induction ring is placed on the threaded and protruding from the bore anchor end 36 and energized. This leads to a heating of the armature 37, by Change in the current in the induction ring can be controlled accurately.
  • a temperature between 80 and 100 degrees Celsius is maintained.
  • At the temperature of the mixture can also cure for a long time, without affecting the further expansion is disturbed.
  • the curing is also beneficial to the warming of the surrounding mountains.
  • the anchors are placed at a distance of 1, 2m so that at the periphery of the mountain outbreak creates a variety of uniform attachment points and all points are on the vertices of the same squares with an edge length of 1, 2m.
  • the anchor is used in the exemplary embodiment a shotcrete construction.
  • a plurality of anchors are set.
  • the curing of the mixture 31 must be correspondingly advanced and the induction rings are removed again.
  • a bellows 50 made of polyethylene (PE) is pushed onto the armature as shown in FIG.
  • the one end of the bellows 50 includes the collar 40.
  • the disc 3 is positioned on the armature end 36 and the bellows 50 pulled over the disc 3.
  • a waterproofing membrane / foil is laid.
  • the laying is done in such a way that the film is placed on the protruding anchor.
  • the anchors 2 penetrate the film.
  • the resulting holes are closed by means of further sealing discs 5.
  • the sealing discs 3 and 5 clamp / clamp the film 4 between them and moreover close tightly with the anchors 2.
  • Fig. 5 a suitable film for the shotcrete construction is shown.
  • the film 10 has a thickness of 2 mm and is sprinkled with strands of material, the strands of material 1 1 have a thread-like structure with a thickness or
  • the material strands 12 have a thickness of 1 to 2 mm and a length of 10 to 30 mm.
  • the different material strands are applied in the exemplary embodiment in separate application operations in order to heat the material strands with a larger diameter differently than the material strands with a smaller diameter.
  • the strands of material are applied in a common application process.
  • Material strands 12 elevations up to a height of 3mm.
  • the film surface is uncovered.
  • the material spread has a basis weight of 250 grams per
  • the different strands of material are sprinkled in the embodiment after heating on the surface of the previously superficially heated film 10.
  • the superficial heating of the strands of material has taken place up to the molten liquid.
  • the heating is carried out by radiation by the material strands are removed by means of a rotary valve from a reservoir and fall through a heating channel down to the slow slow down past slide.
  • the heating channel has in the exemplary embodiment a plurality of electrically operated heating wires and a temperature control. As a result, the temperature of the heating channel can be increased until the falling material strands have the correct surface temperature.
  • a fast-binding cement milk is sprayed thinly onto the film.
  • the dried cement slurry forms an advantageous primer for a subsequent application of shotcrete.
  • the shotcrete is applied in layers, starting at the tunnel sole.
  • the resulting shotcrete layer is designated 6.
  • the tunnel runs horizontally, so that the shotcrete is laid in horizontal layers, which are superimposed from bottom to top of the film.
  • the layers have a width which corresponds to the desired shotcrete layer thickness.
  • a smaller width of the layers is provided so that first a first shotcrete layer is applied to the film, which completely covers the film side. Thereafter, another shotcrete layer is applied, which completely covers the previously discussed shotcrete layer. This is repeated until the desired thickness of the shotcrete layer is reached.
  • the anchors in the exemplary embodiment still protrude from the concrete layer.
  • cladding panels should be attached, especially panels for fire protection.
  • the plates are secured in the embodiment with the anchors 2 and nuts and washers on the shotcrete. So that the thread of the anchor 2 is not unusable by the shotcrete, the thread has been protected by caps when applying the shotcrete.
  • Fig. 7 shows another envelope for the armature and the remaining steel parts at the mountain side of the foil than Fig. 6.
  • the enclosure consists of a pipe section 51 made of PE with welded bellows 52 made of PE.
  • the pipe section 51 is pushed in setting the anchor with the anchor in the well, after there a Sufficient amount of adhesive cartridges / Mortar cartridges have been inserted and positioned. With this amount of cartridges, the gap between the armature and the borehole wall is completely filled and the mortar / adhesive comprises the end of the tubular section 51 projecting into the borehole.
  • the pipe section protrudes 70 mm into the borehole.
  • the hardened mortar / adhesive is tight against the mountain water. When curing the mortar / adhesive not only creates a firm connection with the borehole wall but also a firm and tight connection with the pipe section.
  • the embodiment according to FIG. 8 shows an armature 60 with a fixedly applied coating 63.
  • the coating 63 comprises a triple layer with an armature-side EP layer, an adhesive layer arranged above it and an outer PE layer.
  • This layer structure has proven itself over many decades as corrosion protection for steel gas pipelines. In the application of the known corrosion protection on rock anchors and the same layer thicknesses are provided as on comparable natural gas pipes.
  • the coating 63 comprises a collar 64 seated on the armature which forms a connection for a bellows 65.
  • the bellows 65 includes a fastener 61.
  • the fastener 61 sits on the armature 60 and cooperates with a further fastener, not shown. Between both fasteners, a plastic seal is held, as shown in Fig. 5.
  • the bellows corresponds in its shape, in its manufacture and in its function to the bellows 50.
  • the armature 63 with its coating and the collar 64 is factory-prepared.
  • the anchor is placed in the hole like the other anchors.
  • the mortar and adhesive surround the armature and the coating, but do not penetrate between the armature and the coating.
  • Fig. 9 shows that the coating of the armature can also be done as in the coating of a steel pipe for a natural gas line, namely after application of the EP by extruding the adhesive and by extruding the outer PE layer.
  • the anchor is designated 70 and find an annular nozzle 73 with an extruder 74 for applying the adhesive and an annular nozzle 72 with an extruder 71 for applying the PE use.
  • the annular nozzles 71 and 72 are arranged stationary.
  • the armature moves in the axial direction shown by the arrow.
  • the anchors 70 used have been previously coated with EP. This is done a chamber under sprinkling and fusing finely divided EP particles.
  • anchors lie one behind the other and are coated continuously with adhesive and PE.
  • glue and PE are removed again.
  • a release agent applied to the coated with EP anchor in an unillustrated form, so that the adhesive and the PE there can develop any liability.
  • the release agent may also be paper.
  • the ring nozzles 71 and 73 provided in FIG. 9 depend on the anchor diameter.
  • molten adhesive or molten PE are evenly distributed around the circumference of the armature.
  • Fig. 10 shows a process for coating with adhesive and PE, in which laterally of the armature 75 nozzles 77 and 78 instead of the annular nozzles 71 and 73 are used. These nozzles are suitable for all anchor diameters by the nozzles according to the desired layer thickness of the Anchor surface to be spaced. To adjust the nozzles with their associated extruders 76 and 79 sliders, not shown, are provided, which carry the nozzles with the extruders. In contrast to the embodiment of FIG. 9, the armature must be made in addition to the axial movement in a rotational movement, so that the molten adhesive and the molten PE are evenly distributed on the peripheral surface. The rotational movement is shown by the arrow 80.
  • the adjustability of the nozzles and extruder also allows adaptation to changes in the diameter of the armature during the coating process.
  • the carriages carrying the laterally disposed nozzles and the associated extruders are provided with an adjustment drive.
  • the adjusting drive may be a stepper motor, which acts via a worm on the associated carriage.
  • a distance measurement is provided which is in communication with the adjustment and causes an automatic adjustment.
  • Fig. 1 1 shows armature 85, which are coated by another method.
  • the anchors 85 are prepared like the anchors according to FIGS. 9 and 10 with an EP layer.
  • armature 85 are rotated and a dot-dashed adhesive strip 88 is withdrawn from a roll 86 with a supply 87 and wound on the armature 85.
  • the roller 86 is thereby moved along the armature to be coated in each case.
  • the armature may be moved in place of the roller 86, or both the armature 85 and the roller 86 may be moved.
  • the coating can be limited to any desired area.
  • the coating can also be interrupted and continued as desired.
  • the adhesive strip 88 has a PE layer and an adhesive layer arranged thereunder and has the same thickness as the coating provided according to FIGS. 9 and 10.
  • Fig. 1 1 The winding of Fig. 1 1 is overlapped to effect a secure seal.
  • the overlap is 5mm in the embodiment, in other embodiments, larger or smaller.
  • the overlap amount is adjusted by changing the inclination of the roller 86.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Lining And Supports For Tunnels (AREA)

Abstract

Selon l'invention, des éléments d'ancrage (2) sont fixés dans la roche avec un mortier ou un adhésif et un enrobage (51) qui protège l'élément d'ancrage (2) contre les eaux de montagne est simultanément intégré dans le mortier ou l'adhésif.
EP06818966A 2005-12-03 2006-12-03 Protection anticorrosion pour des éléments d ancrage dans la roche Withdrawn EP1971753A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP06818966A EP1971753A1 (fr) 2005-12-03 2006-12-03 Protection anticorrosion pour des éléments d ancrage dans la roche

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE102005057960 2005-12-03
PCT/EP2006/006358 WO2007006428A2 (fr) 2005-07-09 2006-06-30 Soutenement dans des superstructures et des infrastructures
DE102006049189 2006-10-14
EP06818966A EP1971753A1 (fr) 2005-12-03 2006-12-03 Protection anticorrosion pour des éléments d ancrage dans la roche
PCT/EP2006/011590 WO2007062871A1 (fr) 2005-12-03 2006-12-03 Protection anticorrosion pour des éléments d’ancrage dans la roche

Publications (1)

Publication Number Publication Date
EP1971753A1 true EP1971753A1 (fr) 2008-09-24

Family

ID=56290882

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06818966A Withdrawn EP1971753A1 (fr) 2005-12-03 2006-12-03 Protection anticorrosion pour des éléments d ancrage dans la roche

Country Status (1)

Country Link
EP (1) EP1971753A1 (fr)

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2007062871A1 *

Similar Documents

Publication Publication Date Title
EP1902197A2 (fr) Soutenement dans des superstructures et des infrastructures
DE3430789C2 (fr)
DE3632951A1 (de) Flexible abdichtungsbahn
WO2007062871A1 (fr) Protection anticorrosion pour des éléments d’ancrage dans la roche
EP2410225B1 (fr) Manchette de tuyau en ciment pour le recouvrement anti-corrosion
EP3464742A1 (fr) Bande d'étanchéité destinée à assurer l'étanchéité de joints entre des éléments de construction ainsi que procédé de fabrication d'une telle bande d'étanchéité
DE102012012522A1 (de) Ausbau im Hoch- und Tiefbau
EP1971753A1 (fr) Protection anticorrosion pour des éléments d ancrage dans la roche
EP0283770A2 (fr) Etanchéification d'écrans de sol
DE3203026C2 (de) Abdichtung von Wandungen gegen Druck- und/oder Sickerwasser mittels Dichtungsschicht
DE3149490A1 (de) Abdichtung von wandungen gegen druck und/oder sickerwasser mit einer dichtungsbahn
DE2734054A1 (de) Fugenueberdeckungsband fuer aneinanderstossende bauwerke mit einer kunststoffauskleidung
EP3146156A1 (fr) Élément de protection destiné à être relié à un élément en béton d'une construction de tunnel présentant un drainage
DE102005057959A1 (de) Befestiger für Abdichtungsbahnen
DE3844417C2 (de) Verfahren zum Herstellen eines nachspannbaren Verpreßankers mit Dauerkorrosionsschutz sowie dadurch hergestellter Verpreßanker
DE4444118C1 (de) Mauerdurchführung für Rohre oder Rohrverbindungen
DE102005019645A1 (de) Spritzbetonbau mit Foliendichtung
EP1600603B1 (fr) Procédé et appareil de scellement de paroi intérieure d'un tunnel en béton souterrain
EP0294539B1 (fr) Procédé et dispositif pour le soudage d'un écran d'étanchéité
WO2020007631A1 (fr) Cuvelage de tunnel composé d'au moins deux éléments en béton
DE102005048118A1 (de) Spritzbetonbau mit Foliendichtung
AT374864B (de) Feuchtigkeitsisolierung zur nachtraeglichen einbringung in bestehende aufgehende mauern, waende, fundamente od.dgl.
CH694490A5 (de) Dichtungsanordnung sowie deren Verwendung.
DE102005052220A1 (de) Ankertechnik im Gebirge
CH678450A5 (fr)

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20070828

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

RIN1 Information on inventor provided before grant (corrected)

Inventor name: JONSSON, SVEIN

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Effective date: 20090831