Abstract
A corrosion protection device, in particular a corrosion protection adapter, at least for a protection against corrosion at least of an end region of a geotechnical anchor element, which is in particular realized of a corrosion-sensitive metal or of a corrosion-sensitive metal alloy, for example of a construction steel or a concrete steel, includes at least one sleeve element which is configured at least for a mounting on the geotechnical anchor element, encompassing the end region of the geotechnical anchor element at least in a circumferential direction of the geotechnical anchor element, wherein the sleeve element is made at least largely of a corrosion-resistant metal and includes at least an outer thread.
Claims
1. A corrosion protection device, in particular a corrosion protection adapter, at least for a protection against corrosion at least of an end region of a geotechnical anchor element, which is in particular realized of a corrosion-sensitive metal or of a corrosion-sensitive metal alloy, for example of a construction steel or a concrete steel, with at least one sleeve element which is configured at least for a mounting on the geotechnical anchor element, encompassing the end region of the geotechnical anchor element at least in a circumferential direction of the geotechnical anchor element, wherein the sleeve element is made at least largely of a corrosion-resistant metal and comprises at least an outer thread.
2. The corrosion protection device according to claim 1, wherein the sleeve element is realized as a cap that is at least partially, preferably completely, closed in a longitudinal direction of the sleeve element.
3. The corrosion protection device according to claim 1, wherein the sleeve element comprises an inner thread.
4. The corrosion protection device according to claim 3, wherein a thread crest of the inner thread at the same time forms a thread groove of the outer thread.
5. The corrosion protection device at least according to claim 1, wherein the inner thread and/or the outer thread are/is realized as a thread/as threads having a coarse thread pitch of more than 5 mm.
6. The corrosion protection device according to claim 1, wherein the sleeve element is designed for a force transfer between a nut that is screwed onto the outer thread of the sleeve element and the geotechnical anchor element.
7. The corrosion protection device according to claim 1, wherein the sleeve element is made at least largely of a stainless steel.
8. The corrosion protection device according to claim 1, wherein the sleeve element is realized in a one-part implementation.
9. The corrosion protection device according to claim 1, wherein the sleeve element is a prefabricated component realized separately from the geotechnical anchor element.
10. The corrosion protection device according to claim 1, wherein an inner space of the sleeve element is at least partially filled with a deformable sealing mass.
11. The corrosion protection device according to claim 1, wherein an inner space of the sleeve element is at least partially filled with a deformable adhesive mass.
12. The corrosion protection device according to claim 1, wherein the sleeve element is mountable, in particular screwable, onto a geotechnical anchor element without a tool.
13. The corrosion protection device according to claim 1, wherein the sleeve element has a wall thickness that is equivalent to at least 1.2%, preferably to at least 2.5%, of a maximal outer diameter of the sleeve element.
14. A corrosion protection system with the corrosion protection device according to claim 1 and with a geotechnical anchor element.
15. The corrosion protection system according to claim 14, wherein the corrosion protection device is mounted on the geotechnical anchor element in such a way that interstices between the sleeve element and the geotechnical anchor element are closed toward an environment in a water-tight manner and/or filled with a deformable sealing mass and/or with a deformable adhesive mass.
16. The corrosion protection system according to claim wherein the sleeve element is mounted on the geotechnical anchor element in such a way that, in a state of the geotechnical anchor element being anchored in a ground, a subregion of the sleeve element is sunk in the ground.
17. The corrosion protection system according to claim 16, wherein in the anchored state of the geotechnical anchor element, at least a third of a total longitudinal extent of the sleeve element is arranged so as to be sunk in the ground.
18. A corrosion-protected embankment stabilization system with a corrosion protection system according to claim 14 which is anchored in a ground, with a wire netting made of high-tensile steel, with a clamping plate and with a nut, wherein the clamping plate is threaded into the geotechnical anchor element that is anchored in the ground and furnished with the sleeve element, and whereinby means of the nut that is screwed onto the sleeve element the clamping plate is pressed onto the wire netting in a longitudinal direction of the geotechnical anchor element such that the wire netting is fastened on the ground in an at least substantially positionally fixed manner.
19. The corrosion-protected embankment stabilization system according to claim 18, wherein the clamping plate, the nut and/or the wire netting have/has at least a stainless steel surface or are/is completely made of a stainless steel, the geotechnical anchor element being made of a corrosion-sensitive metal or of a corrosion-sensitive metal alloy.
20. A method for a corrosion-protected anchoring of a geotechnical anchor element which is made of a corrosion-sensitive metal or of a corrosion-sensitive metal alloy, in particular of a construction steel, wherein in at least one method step a sleeve element, which is at least largely made of a corrosion-resistant metal and comprises an outer thread, is mounted in an end region of the geotechnical anchor element, wherein in at least one further method step the sleeve element gets closed toward an environment in a humidity-tight manner, and wherein in at least one further method step the geotechnical anchor element is brought into a ground in such a way that at least a subregion of the sleeve element that is mounted on the geotechnical anchor element is sunk into the ground, in particular mortared into the ground.
Description
DRAWINGS
[0039] Further advantages will become apparent from the following description of the drawings. In the drawings an exemplary embodiment of the invention is illustrated. The drawings, the description and the claims contain a plurality of features in combination. Someone skilled in the art will purposefully also consider the features separately and will find further expedient combinations.
[0040] It is shown in:
[0041] FIG. 1 a schematic view of a portion of a corrosion-protected embankment stabilization system with a corrosion protection system comprising a corrosion protection device,
[0042] FIG. 2 a schematic side view of a sleeve element of the corrosion protection device,
[0043] FIG. 3 a schematic illustration of a section-wise cut portion of the sleeve element,
[0044] FIG. 4 a schematic perspective view of a first side (underside) of the sleeve element,
[0045] FIG. 5 a schematic perspective view of a second side (upper side) of the sleeve element,
[0046] FIG. 6 a further schematic side view of a portion of the sleeve element in a state when screwed onto a geotechnical anchor element of the embankment stabilization system,
[0047] FIG. 7 a schematic sectional view of the embankment stabilization system with the corrosion protection system that comprises the corrosion protection device, and
[0048] FIG. 8 a schematic flow chart of a method for a corrosion-protected anchoring of the geotechnical anchor element.
DESCRIPTION OF THE EXEMPLARY EMBODIMENT
[0049] FIG. 1 shows a schematic view of a portion of a corrosion-protected embankment stabilization system 50. The embankment stabilization system 50 is spread across a ground 46. The embankment stabilization system 50 protects an environment of the ground 46 from erosion. The embankment stabilization system 50 comprises a wire netting 52. The wire netting 52 is made of high-tensile steel wire. The high-tensile steel wire of the wire netting 52 has a tensile strength of at least 800 N/mm.sup.2, preferably of at least 1,000 N/mm.sup.2 and preferentially of at least 1,500 N/mm.sup.2. The high-tensile steel wire of the wire netting 52 has a tensile strength of maximally 3,000 N/mm.sup.2, preferably of maximally 2,500 N/mm.sup.2 and preferentially of maximally 2,000 N/mm.sup.2. The wire netting 52 has a stainless steel surface. The wire netting 52 is made of a stainless steel. The wire netting 52 is configured to be spread two-dimensionally across a surface of the ground 46, for example across an embankment, a rockwall or the like.
[0050] The embankment stabilization system 50 comprises a clamping plate 54. The clamping plate 54 lies upon the wire netting 52. The clamping plate 54 is configured for retaining the wire netting 52 on the ground 46. The clamping plate 54 is configured for pressing the wire netting 52 to the ground 46. The clamping plate 54 is configured to span over several meshes 72 of the wire netting 52. The clamping plate 54 is exemplarily realized as a spike plate configured to engage in several meshes 72 of the wire netting 52. For an engagement in the meshes 72 of the wire netting 52, the clamping plate 54 that is embodied as a spike plate comprises several claw elements 74, which are angled towards the ground 46. Alternatively, the clamping plate 54 may as well be realized as an at least substantially planar plate without claw elements 74. The clamping plate 54 is made of a high-tensile steel but may alternatively also be made of a steel that is not high-tensile. The clamping plate 54 is realized in a monolithic fashion. The clamping plate 54 is made of a stainless steel. The clamping plate 54 has a central opening 76 for receiving at least one geotechnical anchor element 12 (see also FIG. 7) of the embankment stabilization system 50. The geotechnical anchor element 12 is made of a corrosion-sensitive metal or of a corrosion-sensitive metal alloy. The geotechnical anchor element 12 is made of a construction steel. The embankment stabilization system 50 comprises a sleeve element 14. The sleeve element 14 is put over the geotechnical anchor element 12 in an end region 10 of the geotechnical anchor element 12.
[0051] The embankment stabilization system 50 comprises a nut 30. The nut 30 is configured to retain the clamping plate 54 in the state of being pressed to the ground 46. The nut 30 is made of a stainless steel. The nut 30 is screwed onto the geotechnical anchor element 12 which has been threaded into the central opening 76 of the clamping plate 54, more precisely onto the sleeve element 14 encompassing the geotechnical anchor element 12. The sleeve element 14 is designed for a force transfer between the nut 30 that is screwed onto an outer thread 16 of the sleeve element 14 and the geotechnical anchor element 12. By the screwing-on of the nut 30, the nut 30 is pressed against the clamping plate 54, which is in its turn pressed against the ground 46 and against the wire netting 52 in a longitudinal direction 80 of the geotechnical anchor element 12. By means of the fastening method described, the wire netting 52 is fastened on the ground 46 in a positionally fixed manner. The embankment stabilization system 50 optionally comprises a washer 58 which is, in the mounted state of the embankment stabilization system 50, arranged between the nut 30 and the clamping plate 54. The embankment stabilization system 50 comprises a corrosion protection system 42. The corrosion protection system 42 is anchored in the ground 46. The corrosion protection system 42 is configured to form a corrosion protection for the geotechnical anchor element 12. The corrosion protection system 42 comprises a corrosion protection device 44.
[0052] FIG. 2 shows a schematic side view of the corrosion protection device 44. The corrosion protection device 44 comprises the sleeve element 14. The corrosion protection device 44, in particular the sleeve element 14, forms a corrosion protection adapter for the geotechnical anchor element 12. The corrosion protection device 44, in particular the sleeve element 14, is configured for a protection of the end region 10 of the geotechnical anchor element 12 against corrosion. The sleeve element 14 is configured to encompass the end region 10 of the geotechnical anchor element 12 in the circumferential direction of the geotechnical anchor element 12. The sleeve element 14 is configured for a closure of the encompassment of the end region 10 of the geotechnical anchor element 12 in the longitudinal direction 80 of the geotechnical anchor element 12. The sleeve element 14 is configured for a mounting on the geotechnical anchor element 12 such that the end region 10 of the geotechnical anchor element 12 is encompassed in the circumferential direction of the geotechnical anchor element 12. The sleeve element 14 is configured for a mounting on the geotechnical anchor element 12 such that the end region 10 of the geotechnical anchor element 12 is closed in the longitudinal direction 80. The sleeve element 14 is embodied as a cap that is closed in a longitudinal direction 18 of the sleeve element 14. On a front face 60 of the sleeve element 14, the sleeve element 14 forms an abutment for the geotechnical anchor element 12. The longitudinal direction 18 of the sleeve element 14 and the longitudinal direction 80 of the geotechnical anchor element 12 are in the mounted state of the sleeve element 14 oriented parallel to each other.
[0053] The sleeve element 14 is made of a corrosion-resistant metal. The sleeve element 14 is made of a stainless steel. The sleeve element 14 is realized in a one-part implementation. The sleeve element 14 is realized in a monolithic fashion. The sleeve element 14 is realized as a prefabricated component which is implemented separately from the geotechnical anchor element 12. The sleeve element 14 comprises the outer thread 16. The outer thread 16 is configured for the nut 30 to be screwed thereon (see FIG. 1). The outer thread 16 extends over an entire longitudinal extent 78 of the sleeve element 14. The outer thread 16 is constant over the entire longitudinal extent 78 of the sleeve element 14. The longitudinal extent 78 of the sleeve element 14 shown exemplarily in FIG. 2 amounts to 700 mm.
[0054] FIG. 3 shows schematically a section-wise cut portion of the sleeve element 14. The outer thread 16 has a thread pitch 28. The outer thread 16 is embodied as a (rounded) trapezoid thread. The outer thread 16 is embodied as a thread with a coarse thread pitch 28 of more than 5 mm. In the case of the sleeve element 14 shown in FIG. 3 by way of example, the thread pitch 28 of the outer thread 16 is approximately 13 mm. The sleeve element 14 is preferably free of further outer threads, i. e. of further outer thread turns.
[0055] The sleeve element 14 comprises an inner space 32. The sleeve element 14 is realized so as to be hollow in its interior (see also FIG. 4). The sleeve element 14 is embodied as a cap that is closed on one side in the longitudinal direction 18 of the sleeve element 14 (see FIG. 5). The sleeve element 14 has an inner thread 20. The inner thread 20 is arranged in the interior space 32 of the sleeve element 14. The inner thread 20 has a thread pitch 28. The thread pitches 28 of the inner thread 20 and of the outer thread 16 are identical to each other. The inner thread 20 is embodied as a (rounded) trapezoid thread. The (rounded) trapezoid thread has thread flanks 94, 96, which together span a flank angle 98. The flank angle 98 is approximately 90?. The inner thread 20 is embodied as a thread with a coarse thread pitch 28 of more than 5 mm. In the case of the sleeve element 14 that is shown in FIG. 3 by way of example, the thread pitch 28 of the inner thread 20 is approximately 13 mm. The sleeve element 14 is preferably free of further inner threads, i. e. free of further inner thread turns.
[0056] The sleeve element 14 has a wall thickness 38. In the case shown in FIG. 3 by way of example, the wall thickness 38 is approximately 1 mm. The inner thread 20 has a thread crest 22. A minimal inner diameter 86 of the sleeve element 14, formed by the thread crest 22 of the inner thread 20, is equivalent to less than a 30-fold of the wall thickness 38 of the sleeve element 14. In the case shown by way of example, the minimal inner diameter 86 is approximately 25.6 mm. The inner thread 20 has a thread groove 82. The inner thread 20 has a thread depth 88. The thread depth 88 of the inner thread 20 is more than a four-fold of the wall thickness 38. The thread depth 88 of the inner thread 20 is less than a ten-fold of the wall thickness 38. In the case shown in FIG. 3 by way of example, the thread depth amounts to approximately 4.3 mm.
[0057] The outer thread 16 has a thread crest 84. A maximal outer diameter 40 of the sleeve element 14, formed by the thread crest 84 of the outer thread 16, is equivalent to more than a 30-fold of the wall thickness 38 of the sleeve element 14. The maximal outer diameter 40 of the sleeve element 14, formed by the thread crest 84 of the outer thread 16, is equivalent to less than a 40-fold of the wall thickness 38 of the sleeve element 14. In the case shown by way of example, the maximal outer diameter 40 amounts to approximately 31.9 mm. The outer thread 16 has a thread groove 24. The outer thread 16 has a thread depth 92. The thread depth 92 of the outer thread 16 is more than a four-fold of the wall thickness 38. The thread depth 92 of the outer thread 16 is less than a ten-fold of the wall thickness 38. In the case shown in FIG. 3 by way of example, the thread depth 92 of the outer thread 16 is approximately 4.3 mm. The thread depths 88, 92 of the inner thread 20 and the outer thread 16 are approximately identical. The thread crest 22 of the inner thread 20 of the sleeve element 14 at the same time forms the thread groove 24 of the outer thread 16 of the sleeve element 14. The wall thickness 38 is thus equivalent to at least 2.5% of the maximal outer diameter 40 of the sleeve element 14.
[0058] FIG. 6 shows a schematic view of the sleeve element 14 and the geotechnical anchor element 12. The geotechnical anchor element 12 comprises an outer thread 90. The sleeve element 14 can be mounted onto the geotechnical anchor element 12. The sleeve element 14 can be screwed onto the geotechnical anchor element 12. The inner thread 20 of the sleeve element 14 can be screwed onto the outer thread 90 of the geotechnical anchor element 12. The sleeve element 14 can be screwed onto the geotechnical anchor element 12 without a tool (see in FIG. 6 the arrow 100 indicating screwing-on and screwing-off directions).
[0059] FIG. 7 shows a schematic sectional view of the embankment stabilization system with the corrosion protection system 42 comprising the corrosion protection device 44, wherein the geotechnical anchor element 12, in particular the corrosion protection system 42, is sunk into the ground 46 along the longitudinal direction 18 of the geotechnical anchor element 12. The corrosion protection system 42 comprises the geotechnical anchor element 12. The corrosion protection system 42 comprises the sleeve element 14. The sleeve element 14 is mounted on the geotechnical anchor element 12. The corrosion protection device 44 is mounted on the geotechnical anchor element 12 in such a way that interstices 62 (see the enlarged section of a portion of the corrosion protection system 42 in FIG. 7) between the sleeve element 14 and the geotechnical anchor element 12 are closed towards the environment 66 in a water-tight manner. The inner space 32 of the sleeve element 14 is filled at least partially with a deformable sealing mass 34. The interstice 62 of the corrosion protection system 42 between the geotechnical anchor element 12 and the sleeve element 14 screwed onto the geotechnical anchor element 12 is filled with the deformable sealing mass 34. The inner space 32 of the sleeve element 14 is filled at least partially with a deformable adhesive mass 36. The interstice 62 of the corrosion protection system 42 between the geotechnical anchor element 12 and the sleeve element 14 screwed onto the geotechnical anchor element 12 is filled with the deformable adhesive mass 36.
[0060] The sleeve element 14 is mounted on the geotechnical anchor element 12 in such a way that, in a state when the geotechnical anchor element 12 is anchored in the ground 46 (for example in the states shown in FIGS. 1 and 7), a subregion 48 of the sleeve element 14 is also sunk in the ground 46. The geotechnical anchor element 12 is mortared in. The geotechnical anchor element 12 is surrounded by mortar 108. The sleeve element 14 is mounted on the geotechnical anchor element 12 in such a way that, in the state when the geotechnical anchor element 12 is anchored in the ground 46 (for example in the states shown in FIGS. 1 and 7), the subregion 48 of the sleeve element 14 is mortared in the ground 46 together with the geotechnical anchor element 12. In the anchored/mortared-in state of the geotechnical anchor element 12, at least a third of the total length extent 78 of the sleeve element 14 is arranged so as to be sunk in the ground 46. In the anchored/mortared-in state of the geotechnical anchor element 12, the sleeve element 14 extends from the end region of the geotechnical anchor element 12, which is situated outside (above the ground 46), as far as a subregion 48 of the geotechnical anchor element 12, which is situated within (below the ground 46). In the subregion 48 the sleeve element 14 is surrounded by the mortar 108. In order to ensure tight closure of an open side of the sleeve element 14 (see also FIG. 4), the sleeve element 14 that is screwed onto the geotechnical anchor element 12 is partially also mortared/sunk in the ground 46.
[0061] FIG. 8 shows a schematic flow chart of a method for corrosion-protected anchoring of the geotechnical anchor element 12 that is made of a corrosion-sensitive metal or of a corrosion-sensitive metal alloy. In at least one method step 102 an anchor borehole 104 is drilled into the ground 46. In at least one further method step 56 the sleeve element 14, which is made at least largely of the corrosion-resistant metal and comprises the outer thread 16, is mounted in the end region 10 of the geotechnical anchor element 12. In the method step 56 the sleeve element 14 is screwed onto the outer thread 90 of the geotechnical anchor element 12. In at least one further method step 68 the geotechnical anchor element 12 is brought into the ground 46 in such a way that at least a subregion 48 of the sleeve element 14 mounted on the geotechnical anchor element 12 is sunk into the ground 46. In at least one substep 106 of the method step 68, the geotechnical anchor element 12 is inserted into the anchor borehole 104. Before or after an insertion of the geotechnical anchor element 12 into the anchor borehole 104, the sleeve element 14 is screwed onto the geotechnical anchor element 12 in such a way that the sleeve element 14 covers the end region 10 of the geotechnical anchor element 12, which protrudes from the ground 46. Before or after an insertion of the geotechnical anchor element 12 into the anchor borehole 104, the sleeve eleent 14 is screwed onto the geotechnical anchor element 12 in such a way that the sleeve element 14 partially protrudes into the anchor borehole 104 when the geotechnical anchor element 12 has reached its anchoring position in the ground 46. In the mounted state at least a third of the total longitudinal extent 78 of the sleeve element 14 is situated within the anchor borehole 104. Alternatively to a screwing-on of the sleeve element 14 onto the geotechnical anchor element 12 after the insertion of the geotechnical anchor element 12 into the anchor borehole 104, it is also conceivable that the sleeve element 14 is already premounted on the geotechnical anchor element 12 outside the anchor borehole 104. In at least one further method step 64 the sleeve element 14 is closed towards an environment 66 in a humidity-tight manner. In order to achieve the humidity-tight closure, at least a portion of the subregion 48 of the sleeve element 14 which protrudes into the anchor borehole 104, in particular the entire section of the sleeve element 14 which protrudes into the anchor borehole 104, is mortared into the ground 46, in particular into the anchor borehole 104, together with the geotechnical anchor element 12. In at least one further method step 110 the wire netting 52 and/or the clamping plate 54 are/is put over the geotechnical anchor element 12. In at least one further method step 112 the nut 30 is screwed onto the sleeve element 14 which encompasses the end region 10 of the geotechnical anchor element 12. In the method step 112 the nut 30 is screwed onto the sleeve element 14 in such a way that the clamping plate 54 is firmly pressed against the ground 46 and/or against the wire netting 52. After completion of the installation process described, only corrosion-protected elements of the embankment stabilization system 50, in particular elements of the embankment stabilization system 50 which are made of stainless steel, are exposed to the environment 66, i. e. to the atmosphere surrounding the embankment stabilization system 50.
