WO2022136237A1 - Hohlstabverbundanker mit statischem mischsystem und verfahren zum setzen eines hohlstabverbundankers in eine gesteinsschicht - Google Patents
Hohlstabverbundanker mit statischem mischsystem und verfahren zum setzen eines hohlstabverbundankers in eine gesteinsschicht Download PDFInfo
- Publication number
- WO2022136237A1 WO2022136237A1 PCT/EP2021/086732 EP2021086732W WO2022136237A1 WO 2022136237 A1 WO2022136237 A1 WO 2022136237A1 EP 2021086732 W EP2021086732 W EP 2021086732W WO 2022136237 A1 WO2022136237 A1 WO 2022136237A1
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- WO
- WIPO (PCT)
- Prior art keywords
- anchor
- hollow rod
- hollow
- rod
- composite
- Prior art date
Links
- 238000002156 mixing Methods 0.000 title claims abstract description 118
- 239000011435 rock Substances 0.000 title claims abstract description 57
- 230000003068 static effect Effects 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims abstract description 35
- 239000000126 substance Substances 0.000 claims abstract description 14
- 238000005192 partition Methods 0.000 claims abstract description 11
- 238000005065 mining Methods 0.000 claims abstract description 8
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 6
- 239000002131 composite material Substances 0.000 claims description 69
- 238000007789 sealing Methods 0.000 claims description 16
- 238000005520 cutting process Methods 0.000 claims description 9
- 238000001125 extrusion Methods 0.000 claims description 8
- 239000004033 plastic Substances 0.000 claims description 6
- 229920003023 plastic Polymers 0.000 claims description 6
- 230000009172 bursting Effects 0.000 claims description 4
- 238000005553 drilling Methods 0.000 claims description 4
- 125000006850 spacer group Chemical group 0.000 claims description 4
- 238000013022 venting Methods 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 6
- 239000000853 adhesive Substances 0.000 description 38
- 230000001070 adhesive effect Effects 0.000 description 38
- 238000013461 design Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 238000003825 pressing Methods 0.000 description 5
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- 239000011440 grout Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000006641 stabilisation Effects 0.000 description 3
- 238000011105 stabilization Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 239000004567 concrete Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000004696 Poly ether ether ketone Substances 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- JUPQTSLXMOCDHR-UHFFFAOYSA-N benzene-1,4-diol;bis(4-fluorophenyl)methanone Chemical compound OC1=CC=C(O)C=C1.C1=CC(F)=CC=C1C(=O)C1=CC=C(F)C=C1 JUPQTSLXMOCDHR-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
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- 239000000945 filler Substances 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
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- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
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Classifications
-
- 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
- E21D21/008—Anchoring or tensioning means
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
- E21D20/025—Grouting with organic components, e.g. resin
- E21D20/026—Cartridges; Grouting charges
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
- E21D20/028—Devices or accesories for injecting a grouting liquid in a bore-hole
Definitions
- the invention relates to a hollow rod composite anchor for stabilizing layers of rock in mining, tunnelling, civil engineering and rock engineering, having at least one anchor foot with one or more outlet channels and a hollow rod which can be fastened to the anchor foot, comprising a static mixing device adjacent to the anchor foot, a cartridge divided into two compartments for accommodating chemical fasteners and a two-part squeezing plunger corresponding to the compartment division, the static mixing device consisting of several mixing elements arranged one behind the other, the direction of flow of the chemical fastener along the static mixing device being at least twice greater than or equal to 150° and smaller or equal 210° is changed. Furthermore, the present invention relates to a method for setting a hollow rod composite anchor in a rock layer.
- DE 1020 060 467 62 A1 discloses a hollow rod composite anchor designed as a cartridge anchor, usable as a two-step anchor for use in mining, tunnelling, civil engineering and rock construction, with an adhesive, in particular a prefabricated adhesive, which is at least partially embedded in a hollow rod bore of a hollow rod Pressure adhesive, at least one bursting valve provided on the anchor foot side and at least one piston positioned on the anchor foot side, the outer surface of the hollow rod composite anchor being coated with an adhesive, if necessary with added filler.
- an adhesive in particular a prefabricated adhesive, which is at least partially embedded in a hollow rod bore of a hollow rod Pressure adhesive, at least one bursting valve provided on the anchor foot side and at least one piston positioned on the anchor foot side, the outer surface of the hollow rod composite anchor being coated with an adhesive, if necessary with added filler.
- DE 1020 090 560 89 A1 discloses a single-phase self-drilling and a two-phase cartridge spiral mixer anchor designed to be rotationally impact resistant, as a hollow rod anchor with/without drill bit, chip chamber, stepped grinder and rotary slide, but with an externally applied or rolled-on mixer spiral as the active one Movement mixers for thin-bed mixing with/without a fixed cartridge tube with the cooling channels and adhesive ribs for cooling the drill bit and for storing the adhesive cartridge with bracing adhesive are used for mixing the pressed-out adhesive cartridge in the anchor ring space and for curing with a chemically controlled increase in volume, for additional anchor bracing in mining and tunnel civil engineering and rock construction, so trained that with the externally applied mixer spiral, as an active movement mixer, a thin-bed mixture in the tot. Anchor length is made.
- DE 69 317 784 T2 discloses a further embodiment of a device for fastening a rock anchor in a hole in the rock, the device having a fastening element, in particular an expansion dowel, which is provided on a threaded part on the inner end of a rock anchor, the outer end of the rock bolt is provided with a washer-like pressing member adapted to press against the rock, with a nut on a threaded portion at the outer end of the rock bolt, for pressing against a support member having an opening for supplying grout to fill the cavity between the rock bolt and the rock, to improve the anchoring and to provide protection against corrosion, the rock bolt being provided with a tube which extends at least over the greater part of the free length of the rock bolt and is intended to supply grout to the inner end of the rock hole, the Supporting element the shape of a at least partially spherical shell, with an interior space for feeding grout through a hole formed in the side wall of this support member.
- a fastening element in particular an expansion dowel
- the object of the present invention to at least partially overcome the disadvantages known from the prior art. It is in particular the object of the present invention to provide an improved shear connector and an improved method for setting a shear connector in a rock layer, in which case the setting process in particular can be simplified and configured more quickly.
- the object is achieved by the features of the independent claims, aimed at the hollow rod composite anchor according to the invention and the method according to the invention.
- Preferred configurations of the invention are specified in the subclaims, in the description or in the figures, with further features described or shown in the subclaims or in the description or in the figures being an object of the invention, individually or in any combination, as long as the context does not clearly indicate the opposite.
- a hollow rod composite anchor for stabilizing layers of rock in mining, tunneling, civil engineering and rock engineering, having at least one anchor base with one or more outlet channels and a hollow rod that can be attached to the anchor base, comprising a static mixing device adjacent to the anchor base, a A cartridge divided into two compartments by a partition for receiving chemical fasteners and a two-part squeezing plunger corresponding to the compartment division, characterized in that the static mixing device consists of a plurality of mixing elements arranged one behind the other, the flow direction of the chemical fastener along the static mixing device being at least two times greater or equal to 150° and less than or equal to 210° is changed.
- the proposed structure of the mixing unit together with the provision of a two-component adhesive system, can contribute to the mixing process being able to be carried out very efficiently within a very short period of time. All in all, the process times are very short and the anchor is bonded homogeneously in the rock.
- the compact design allows the use of a relatively large volume of adhesive, which is also difficult to stabilize rock strata, for example porous formations.
- the hollow composite rod anchor according to the invention is suitable for stabilizing layers of rock in mining, tunnelling, civil engineering and rock construction. Layers of rock can be consolidated superficially by inserting anchors in order to prevent rock fragments or slabs from coming off unintentionally.
- the chemical anchors are inserted with the anchor foot into the anchor boreholes, which are produced using wet or dry drilling methods depending on the hardness of the rock.
- the shear connector has a number of assemblies, with the other parts, in addition to the anchor base, usually being arranged within a cylindrical rod.
- the hollow bar can be made of metal, for example steel.
- the hollow rod composite anchor is first inserted into the drill hole on the anchor foot side and pushed all the way into the drill hole using the hollow rod attached to it.
- the hollow rod composite anchor can be formed from just a single hollow rod with an anchor base or from a plurality of hollow rods and an anchor base.
- the other hollow rods can serve as an extension of the first hollow rod connecting anchor via a mechanical connection option.
- the hollow rod composite anchor has at least one anchor base with one or more outlet channels. After the insertion of the hollow rod composite anchor, the anchor base is at the deepest point in the drill hole and from the anchor base fastening means can be guided out of the anchor into the surrounding rock via the outlet channels.
- the exiting fasteners apply adhesive to the entire or at least a large part of the anchor on the outside, so that after setting there is a firm connection between the hollow rod composite anchor and the surrounding rock layer.
- the outlet channels can be arranged symmetrically or asymmetrically on or in the anchor base, and the anchor base can preferably have more than 2, more preferably more than 3 and furthermore preferably more than 4 outlet channels.
- the hollow bar can be attached to the anchor foot.
- the hollow rod with the other structural components of the hollow rod composite anchor can either be fixedly connected to the anchor base or designed to be connectable to it.
- the hollow bar can be connected to the anchor base via a screw, clamp, welded or adhesive connection, or it can be connected to the anchor base shortly before insertion.
- variable anchor feet depending on the rock situation or different hollow rods for example varying in hollow rod volume, can be used for fastening.
- the material of the hollow bar can preferably be made of metal, furthermore preferably made of steel. Possible dimensions of the hollow rod are in a range from approx. 50 cm to 3 m in length and 2.5 cm to 50 cm in diameter.
- a static mixing device is located adjacent to the anchor base. Starting at the bottom of the borehole, the anchor base extends first and the hollow rod can be attached to it, with the static mixing device being located inside the hollow rod adjacent to the anchor base.
- a static mixing device has no mechanically driven mixing elements. The mixing effect of the static mixer is essentially based on the forced guidance of the components to be mixed by the guide devices of the static mixer. The components to be mixed are thus first passed through the static mixer, mixed in it and leave the mixing device in the direction of the anchor base. The mixed adhesive is fed through the outlet channels of the anchor foot into the gap between the hollow rod composite anchor and the rock, where it then hardens completely.
- the mixing device can preferably assume an extension in the longitudinal direction of the hollow rod shear connector of greater than or equal to 5 cm and less than or equal to 50 cm.
- the ratio of the total length of the mixer to the hollow rod composite anchor expressed as the length of the static mixer unit divided by the length of the hollow rod composite anchor, can be greater than or equal to 0.01 and less than or equal to 0.5. Within this range, good mixing results can still be obtained with sufficient adhesive volumes.
- the hollow composite rod anchor has a cartridge divided into two compartments by a partition wall for receiving chemical fasteners.
- the static mixer is filled with fastening means via a cartridge, wherein the fastening means can preferably be a two-component adhesive made of hardener and binder.
- the two adhesive components can preferably be filled in the different compartments of the cartridge and be present separately from one another via the dividing wall.
- the two compartments of the cartridge can have the same or different volumes.
- the adhesive component(s) in the cartridge are partially liquefied by applying pressure and driven in the direction of the mixer. There the components are intimately mixed and react.
- the mixed adhesive leaves the anchor base through the outlet channels and hardens between the outside of the anchor and the borehole wall, partially or completely along the length of the borehole up to the anchor head.
- the hollow rod composite anchor has a two-part ejection stamp corresponding to the compartment division.
- the two different adhesive components are each in separate compartments. In order to bring both components to react with each other, these pressed through the static mixing unit in the direction of the anchor base by an ejection ram.
- the squeezing ram is designed in such a way that each of the individual compartments is squeezed out by a separate part of the squeezing ram.
- the shape of the squeezing plunger is adapted to the geometry of the corresponding compartment.
- the individual parts of the squeezing ram can have different surface dimensions.
- the two parts of the squeezing ram can be designed symmetrically, particularly in cases in which the two components of the adhesive system occupy approximately the same volumes within the hollow rod.
- the two parts of the squeezing stamp can squeeze out the respective compartments independently of one another by applying pressure.
- the two parts it is also possible for the two parts to be designed so that they can be connected to one another, so that when pressure is applied they move together and simultaneously in the direction of the anchor base.
- the squeezing stamp can preferably be made of plastic or metal.
- the static mixing device consists of a plurality of mixing elements arranged one behind the other, the direction of flow of the chemical fastener along the static mixing device being changed at least twice by greater than or equal to 150° and less than or equal to 210°.
- the static mixing device is formed from individual mixing elements, with the geometry of the individual mixing elements and the arrangement of the mixing elements one behind the other determining the overall mixing effect of the static mixing device.
- the mixing effect results from the overflow of the individual element and also via the guidance along the individual elements. In particular, it has proven to be very efficient that the overall flow of the fasteners to be mixed through the mixing device is reversed at least twice via the arrangement of the individual mixing elements relative to one another.
- the change in direction in the direction of flow of the already mixed fastener can be approximately 180° twice.
- the change in flow direction does not have to occur immediately.
- the direction of flow results over a certain distance in the mixer.
- the flow direction can change within a distance that is less than or equal to 10% of the total mean distance of the fastener through the static mixing element.
- the cartridge can have an outlet opening on the anchor foot side to at least one of the outlet channels of the anchor foot, the outlet opening of the cartridge being arranged acentrically to the axis of symmetry of the cartridge.
- the outlet opening of the cartridge is not arranged symmetrically on the cartridge.
- it can be favorable for cartridges with a cylindrical design that the outlet opening is not arranged in the center of the cylinder, but rather offset in the direction of the circumference.
- the anchor is bonded very evenly to the surrounding rock.
- the mixing elements of the static mixing device can be present in at least three different rows of mixing elements, with the axes of symmetry of the individual rows of mixing elements being offset from one another.
- the individual mixing elements For an improved mixing performance with only a slight increase in counter-pressure during squeezing, it has been found to be particularly advantageous for the individual mixing elements to be arranged in rows, with the individual rows being next to one another rather than behind one another.
- the offset of the axes of symmetry of the individual rows of mixing elements results in improved guidance of the adhesive in the static mixer.
- the axes of symmetry of the individual rows of mixing elements can preferably form a triangle in the direction of the axis of symmetry of the armature. This can contribute to the formation of a particularly compact mixer design while maintaining the necessary mixing capacity.
- the different rows of mixing elements can be arranged offset relative to the anchor base along the longitudinal axis of the hollow rod composite anchor.
- the axes of symmetry of the rows of mixing elements are not arranged on the axis of symmetry of the hollow rod composite anchor.
- the axis of symmetry of the hollow rod composite anchor lies in the center of gravity of a triangle, with the axes of symmetry of the individual rows of mixing elements being arranged at the vertices of the triangle. This can further reduce the necessary dimensions of the static mixer and can be advantageous in particular for cases in which the outlet of the mixed product from the static mixer is also not on the axis of symmetry of the hollow rod shear connector.
- the static mixing device can consist of individual mixing elements, the mixing elements at least have at least two different geometries.
- the mixing elements In order to optimize the mixing result while at the same time reducing the spatial expansion of the static mixer in the direction of the axis of symmetry of the hollow rod connector, it has proven to be particularly advantageous that not just one type of mixing element is installed in the individual rows of mixing elements. In particular, it can prove advantageous that two different elements are present in a row of mixing elements. This can simplify the flow guidance of the fasteners and reduce the flow resistances that occur in the static mixer.
- the extrusion die can have at least a three-part, symmetrical structure with upper and lower guide lips and central sealing lips spaced apart from one another, with the smallest distance between the outer guide lips and the inner sealing lips being based on the longest extent of the inner sealing lips is greater than or equal to 0.25 and less than or equal to 0.75.
- the design of the ejection ram can be particularly important in cases where the highest possible pressure has to be built up to secure the anchor in the rock. This situation can arise, for example, when very long anchors have to be anchored in the rock. A further difficulty arises in cases where very viscous fasteners are used, which also have a low dilatancy.
- the stamp In these cases, it must be ensured that the stamp can exert an even force on the fasteners.
- the design of the stamp must ensure that the squeezing medium, for example water or compressed air, is not pressed past the stamp and into the fastening means. In these cases, the adhesive strength of the fastener may be reduced and the anchor may not be adequately secured in the rock.
- the three-part structure mentioned above with a defined distance between the outer guide lips and the inner sealing lips has proven to be particularly suitable for both low and high-viscosity systems.
- the structure can also contribute to a uniform feed of the ejection plunger into the adhesive cartridge under high pressure. A steady feed rate is particularly achievable for cases in which the two compartments of the adhesive have different volumes.
- the inner sealing area of the stamp provides a sufficient sealing effect, with the force being applied to the sealing stamp via the guide lips of the stamp. Slight changes in the ejection pressure can thus be compensated via the guide lips of the ejection stamp.
- the central, sealing part of the squeezing ram can have more than two, more preferably more than three, individual sealing lips or sealing bulges.
- Plastics such as PEEK, PE, PP, POM or rubber have proven to be particularly suitable as the material, in particular for the middle part with the sealing lips.
- the two parts of the two-part squeezing ram can be rigidly connected to one another at least via a partition wall cutting device.
- a partition wall cutting device For a uniform transfer of pressure and for a uniform mixing result, it has turned out to be particularly advantageous that the two parts of the squeezing plunger are mechanically connected to one another.
- a uniform advance results and thus a uniform squeezing of the two-component adhesive from the compartments.
- the compartment wall can be destroyed using a cutting device.
- This cutting device can be formed, for example, by a knife or a sharp edge. In this configuration, it is possible to achieve particularly fast squeezing times under uniform compressive stress.
- the two parts of the two-part squeezing stamp can be designed mirror-symmetrically and the partition wall Cutting device can be arranged acentrically from the common axis of symmetry of the two ejection pistons. Particularly in cases where the two compartments of the cartridge have different volumes, it can prove advantageous that the cutter device is not arranged on the axis of symmetry of the ejection piston. In cases where the squeezing piston is rotationally symmetrical, the cutting device can be arranged on the axis of rotation or at a distance from it.
- the cutting device is advantageously designed at a distance from it, so that not only the center of the partition between the compartments, but also part of the encompassing partition is also separated at the compartment edges. This can contribute to a faster and more even squeezing process of the adhesive from the individual compartments.
- a bursting valve can be arranged in the at least one outlet channel of the anchor foot.
- the outlet channels it has proven to be advantageous for the outlet channels to have bursting valves, which open as a function of the pressure only after significant pressure has been applied to the hollow rod composite anchor within the scope of a desired open the squeezing process. This can prevent unwanted destruction of the compartments via the squeezing plunger due to brief mechanical stress and contribute to a uniform and controlled squeezing process.
- the squeezing ram can have one or more venting channels along the axis of symmetry of the squeezing ram.
- the squeezing ram can have openings which allow air to be passed through from the direction of the anchor base in the direction of the borehole mouth. This can result in a smoother squeezing out of the adhesive and, due to the lower back pressure, contribute to an increase in work safety.
- a plastic jacket with internal spacers can be arranged on the outside of the hollow rod connector. Due to the higher extrusion speeds that can be achieved through the improved mixing process, it can be useful to direct the flow of adhesive emerging from the anchor foot, at least partially, over a plastic jacket, which is arranged at a distance from the surface of the hollow rod composite anchor via spacers.
- the plastic jacket can also have other devices on its surface for guiding the emerging stream of adhesive. This can be achieved, for example, by shaped protuberances, which give the flow a further, targeted directional impulse. This configuration can be particularly useful for cases in which the outlet channels of the anchor foot are not distributed symmetrically over the anchor foot surface. This makes it possible to even out uneven distributions of the exiting current over the surface of the hollow rod bonded anchor.
- the hollow rod can have fastening means for attaching a further hollow rod at the anchor foot furthest away.
- the end of the anchor lying in the direction of the mouth of the borehole is prepared to be connected to a further hollow rod.
- deep boreholes can also be easily equipped with one or more hollow rod composite anchors even under cramped space conditions, for example in narrow tunnels.
- only the first anchor can have a statistical mixing element and the other anchors can exclusively provide additional adhesive compartments with squeezing pistons.
- the adhesive mixtures of the different hollow rod composite anchor parts can differ in their structure.
- the other compartments can contain adhesive with a volume increaser Stuff, such as foaming systems, which are able to securely bond larger volumes.
- a volume increaser Stuff such as foaming systems
- This configuration with extendable hollow rod composite anchors can also have outlet openings at other anchor points, so that the entire quantity of adhesive does not have to emerge at the outlet channels of the anchor foot. This can improve handling and flexibility even at very large well depths.
- the hollow rod can have means for clearly identifying the hollow rod.
- the individual hollow rod anchor can be clearly identifiable. This can be done, for example, by means of a marker attached to the surface of the hollow rod, the anchor base or the end of the hollow rod. Color, bar or QR codes, for example, or also RFID markers can be used for this purpose. Manufacturing conditions such as time, place, length of the anchor and personnel can be clearly assigned and archived for further analysis.
- Also according to the invention is a method for setting a hollow rod composite anchor in a rock layer, the method comprising at least the steps of: a) drilling a hole in a rock layer to be stabilized; b) Setting a Hol shear connector according to the invention; and c) squeezing the chemical fasteners from the two compartments through the static mixer and the anchor foot by pressurization; includes.
- the squeezing process can take place within 15 seconds, preferably within 10 seconds and also less than 5 seconds. Very even stabilization of the anchor in the rock can be achieved within these extrusion times, which helps to reduce the costs for the setting process. It can also advantageously be pressed out using compressed air or water, it being possible to work within “usual” pressure ranges. Advantageously, no special equipment is required for setting.
- explicit reference is made to the advantages of the hollow rod composite anchor according to the invention.
- the pressure load in method step c), can be recorded over time for each squeezing process and stored digitally.
- the recording and storage of the time-dependent pressure profiles of the pressing process has proven to be particularly reliable. Unexpected positive or negative changes in the applied pressure can indicate deviations in the assumed properties of the existing rock formation, which can have a significant impact on the desired success of the stabilization measures. These can be detected via the pressure profile and give rise to further preventive measures.
- 1 schematically shows the structure of a hollow rod composite anchor according to the invention
- 2 shows schematically the structure of an anchor base which can be used in the hollow rod composite anchor according to the invention and has one or more outlet channels;
- FIG. 3 shows a schematic of a static mixing device that can be used in the hollow shear connector according to the invention and consists of a plurality of mixing elements arranged one behind the other in a combination of three rows of mixing;
- FIG. 4 shows a schematic of a static mixing device which can be used in the hollow shear connector according to the invention and consists of a plurality of mixing elements arranged one behind the other in a two-mixing row combination;
- FIG. 6 schematically shows the structure of a press-out stamp that can be used in the hollow rod composite anchor according to the invention
- FIG. 1 shows a possible embodiment according to the invention of a hollow rod composite anchor 1.
- the hollow rod composite anchor 1 has an anchor base 3, which has one or more outlet channels (not shown) for the emergence of a fastener from the hollow rod composite anchor 1 .
- Fastening means are pressed between the hollow rod connector 2 and the borehole via the outlet channels of the anchor foot 3 and the hollow rod connector 1 is thus anchored in the borehole.
- the hollow rod 2 is arranged on the anchor base 3 and extends over the other functional parts (4, 5, 6) of the hollow rod composite anchor 1 lying on the inside.
- the static mixing device 4 Inside the hollow rod 2 , adjacent to the anchor base 2 , is the static mixing device 4 , in which the fastening means, for example a 2-component adhesive, is mixed before it emerges through the anchor base 3 .
- the adhesive is located in two compartments separated by a partition divided cartridge 5, which is squeezed out by a squeezing stamp 6 via pressurization.
- the hollow rod composite anchor 1 is inserted into the borehole and the squeezing ram 6 is moved, for example by water pressure, in the hollow rod 2 from the farthest borehole 7 forwards in Richter's anchor foot 3 .
- the adhesive is pressed out of the cartridge 5 into the static mixing device 4 by the acting forces.
- the adhesive is intimately mixed and enters the borehole via the outlet channels of the anchor base 3 and anchors the hollow rod composite anchor 1 via the outer anchor walls in the borehole.
- FIG. 2 shows a possible embodiment of an anchor foot 3.
- the anchor foot 3 can have an anchor tip in which one or more outlet channels 8 for the fastening means are arranged.
- FIG. 3 shows a side view of an arrangement according to the invention of mixing elements 16 lying one behind the other of the static mixing device 4 .
- the individual mixing elements 16 are combined to form three rows 9 of mixing elements, with the center points of the rows forming a triangle relative to the direction of the flow of force.
- This means that the rows of mixing elements 9 with the respective mixing elements 16 connected in series are arranged offset to one another, with the two different geometries for the individual mixing elements 16 being shown in this illustration.
- the flow of the fastener around the mixing elements 16 and rows 9 results in the direction of flow of the fastener being deflected twice by approximately 180° between the entry and exit from the static mixer.
- FIG. 4 shows a side view of an arrangement according to the invention of mixing elements 16 lying one behind the other of the static mixing device 4 .
- the individual mixing elements 16 are combined to form two rows of mixing elements 9 and the rear row of mixing elements in FIG. 3 has been omitted for the sake of clarity.
- the individual rows of mixing elements 9 are each made up of two different mixing elements 10, 11. These two configurations 10, 11 of the mixing elements 16 can contribute to an optimized mixing result without greatly increasing the flow resistance. Relatively large quantities of high-viscosity fasteners can also be processed with good mixing performance and a pressure that is not too high.
- FIG. 5 shows a possible housing of the mixing device 4 within the hollow rod 2 (not shown).
- the mixing elements that may be arranged in rows can be easily and safely introduced into the hollow rod and anchored in it through this housing.
- the opening 12 of the mixing device points in the direction of the anchor base 3 and the rear side 13 of the mixing device 4 points in the direction of the cartridge (not shown), which is divided into two compartments.
- FIG. 6 shows a possible embodiment according to the invention of one half of a two-part squeezing die 6 according to the invention.
- the second half is mirror-symmetrical to the first half 6 and is fixed to the first half by a cutting device which is arranged between the two halves 6.
- the upper and lower guide 15 and the central sealing lips 14 of the two-part ejection ram are shown.
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- 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)
- Piles And Underground Anchors (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2021404990A AU2021404990A1 (en) | 2020-12-23 | 2021-12-20 | Hollow rod shear connector having static mixing system and method for setting a hollow rod shear connector in a rock layer |
US18/034,256 US20230392500A1 (en) | 2020-12-23 | 2021-12-20 | Hollow rod shear connector having static mixing system and method for setting a hollow rod shear connector in a rock layer |
EP21843624.4A EP4217588A1 (de) | 2020-12-23 | 2021-12-20 | Hohlstabverbundanker mit statischem mischsystem und verfahren zum setzen eines hohlstabverbundankers in eine gesteinsschicht |
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DE102020134867.3 | 2020-12-23 | ||
DE102020134867.3A DE102020134867A1 (de) | 2020-12-23 | 2020-12-23 | Hohlstabverbundanker mit statischem Mischsystem |
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WO2022136237A1 true WO2022136237A1 (de) | 2022-06-30 |
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PCT/EP2021/086732 WO2022136237A1 (de) | 2020-12-23 | 2021-12-20 | Hohlstabverbundanker mit statischem mischsystem und verfahren zum setzen eines hohlstabverbundankers in eine gesteinsschicht |
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US (1) | US20230392500A1 (de) |
EP (1) | EP4217588A1 (de) |
AU (1) | AU2021404990A1 (de) |
DE (1) | DE102020134867A1 (de) |
WO (1) | WO2022136237A1 (de) |
Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE69317784T2 (de) | 1992-09-09 | 1998-08-20 | Oersta Stalindustri As | Felsanker |
US20010028833A1 (en) * | 2000-04-10 | 2001-10-11 | Sager Lutz Achim | Fastening element |
DE10301968A1 (de) * | 2003-01-20 | 2004-07-29 | Hilti Ag | Gebirgsanker |
US20050260041A1 (en) * | 2004-05-13 | 2005-11-24 | Wolfgang Ludwig | Fastening element |
DE102006046762A1 (de) | 2006-09-29 | 2008-04-10 | Werner P. Dipl.-Ing. Berwald | Kartuschenanker sowie Verfahren zur Herstellung eines Kartuschenankers |
WO2010072792A1 (de) * | 2008-12-23 | 2010-07-01 | Htp Motion Gmbh | Ankerhülse für felsenbohrungen |
EP2251526A2 (de) * | 2009-05-08 | 2010-11-17 | HILTI Aktiengesellschaft | Selbstbohrendes Befestigungselement |
DE102009056089A1 (de) | 2009-11-30 | 2011-06-01 | Werner P. Dipl.-Ing. Berwald | Patronen-Spiralmischanker |
DE102010014612A1 (de) * | 2010-04-10 | 2011-10-13 | Werner P. Berwald | Zweiphasen-Patronen-Mutterspannhülsen-Spiralmischanker |
DE102011102994A1 (de) * | 2010-12-28 | 2012-06-28 | Minefix GmbH | Gesteinsanker |
EP2532832A2 (de) * | 2011-06-08 | 2012-12-12 | Giddicca (Pty) Ltd | Haftmittel mit röhrenförmigem Steinanker |
-
2020
- 2020-12-23 DE DE102020134867.3A patent/DE102020134867A1/de active Pending
-
2021
- 2021-12-20 EP EP21843624.4A patent/EP4217588A1/de active Pending
- 2021-12-20 WO PCT/EP2021/086732 patent/WO2022136237A1/de active Application Filing
- 2021-12-20 AU AU2021404990A patent/AU2021404990A1/en active Pending
- 2021-12-20 US US18/034,256 patent/US20230392500A1/en active Pending
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE69317784T2 (de) | 1992-09-09 | 1998-08-20 | Oersta Stalindustri As | Felsanker |
US20010028833A1 (en) * | 2000-04-10 | 2001-10-11 | Sager Lutz Achim | Fastening element |
DE10301968A1 (de) * | 2003-01-20 | 2004-07-29 | Hilti Ag | Gebirgsanker |
US20050260041A1 (en) * | 2004-05-13 | 2005-11-24 | Wolfgang Ludwig | Fastening element |
DE102006046762A1 (de) | 2006-09-29 | 2008-04-10 | Werner P. Dipl.-Ing. Berwald | Kartuschenanker sowie Verfahren zur Herstellung eines Kartuschenankers |
WO2010072792A1 (de) * | 2008-12-23 | 2010-07-01 | Htp Motion Gmbh | Ankerhülse für felsenbohrungen |
EP2251526A2 (de) * | 2009-05-08 | 2010-11-17 | HILTI Aktiengesellschaft | Selbstbohrendes Befestigungselement |
DE102009056089A1 (de) | 2009-11-30 | 2011-06-01 | Werner P. Dipl.-Ing. Berwald | Patronen-Spiralmischanker |
DE102010014612A1 (de) * | 2010-04-10 | 2011-10-13 | Werner P. Berwald | Zweiphasen-Patronen-Mutterspannhülsen-Spiralmischanker |
DE102011102994A1 (de) * | 2010-12-28 | 2012-06-28 | Minefix GmbH | Gesteinsanker |
EP2532832A2 (de) * | 2011-06-08 | 2012-12-12 | Giddicca (Pty) Ltd | Haftmittel mit röhrenförmigem Steinanker |
Also Published As
Publication number | Publication date |
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AU2021404990A1 (en) | 2023-07-13 |
EP4217588A1 (de) | 2023-08-02 |
US20230392500A1 (en) | 2023-12-07 |
DE102020134867A1 (de) | 2022-06-23 |
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