Connection assembly and method for providing such a connection assembly

Abstract

The present invention relates to a connecting arrangement (101, 102, 103) comprising a support pillar (12) which is or can be inserted into a ground (14), a connecting pillar (16) connected to the support pillar (12), wherein the support pillar (12) and the connecting pillar (16) are connected to one another to form an annular overlapping space (18), and a first seal (20) is arranged in the overlapping space (18), which seal divides the overlapping space (18) into a first section (22) and a second section (24), a connecting means (26) arranged in the first section (22) for connecting the support pillar (12) and the connecting pillar (16), and a second seal (28) arranged in the second section (24). The invention also relates to a method for providing and renovating such a connecting arrangement (101, 102, 103).

Description

[0001] The present invention relates to a connecting arrangement for connecting a supporting pillar to a connecting pillar and to a method for providing and renovating such a connecting arrangement.

[0002] Such connection arrangements are used, among other things, for offshore wind turbines. One support pier ("monopile") or several support piers (especially "tripiles") are driven into the seabed. However, it is virtually impossible to align the support piers exactly vertically. Therefore, a connecting pier is either inserted into a sleeve-shaped opening in the support pier or pushed over the support pier, forming a ring- or gap-shaped overlap space with a gap width of approximately 10 cm. The connecting pier is aligned vertically. A connecting material, typically mortar or concrete, also called "grout," is introduced into this overlap space in a pumpable state and then cured. Once cured, the mortar connects the support pier and the connecting pier. A wind turbine tower can then be built on top of the connecting pier.Further information on this can be found, for example, in DE 20 2015 002 455 U1, DE 10 2014 104 675 B3 and DE 10 2010 024 294 A1.

[0003] To prevent the bonding agent from flowing uncontrollably through or out of the overlap gap when pumped, a first seal is placed in the overlap gap, dividing it into a first and a second section. When installed, the first section is positioned above the second section. The bonding agent is pumped into the first section. Typically, the first section is completely filled with the bonding agent before it can harden.

[0004] The first seal is usually below the water surface or just slightly above it and can be damaged as a result of weather conditions such as ice formation and mechanical impacts such as wave action, or during installation. As a result, water, especially seawater, can also directly impact the fastener and damage it, particularly as a result of frost heave. The detached parts of the fastener can no longer be held in the overlap space by the damaged seal, but are carried away by the seawater. The load-bearing capacity of the connection assembly continues to decrease, and failure of the connection assembly can occur.

[0005] The object of one embodiment of the present invention is to provide a connection arrangement that makes it possible to remedy the above-mentioned disadvantages using simple and cost-effective means and, in particular, to ensure the load-bearing capacity of the connection arrangement over an extended operating period. Furthermore, one embodiment of the present invention is based on the object of providing a method for providing and renovating such a connection arrangement.

[0006] This object is achieved by the features specified in claims 1, 7, and 11. Advantageous embodiments are the subject of the subclaims.

[0007] One embodiment of the invention relates to a connecting arrangement comprising a support pillar which can be or is inserted into a ground, a connecting pillar connected to the support pillar, wherein o the support pillar and the connecting pillar are connected to one another to form an annular overlapping space, and o a first seal is arranged in the overlapping space, which divides the overlapping space into a first section and a second section, a connecting means arranged in the first section for connecting the support pillar and the connecting pillar, and a second seal arranged in the second section.

[0008] The second seal can be installed during the manufacturing of the connection assembly or subsequently. The second seal protects the first seal from external influences, particularly from weather influences and mechanical influences caused by water. The likelihood of the first seal becoming damaged or of existing damage progressing is significantly reduced with the second seal. The second seal also reduces the aforementioned influences on the fastener. Furthermore, the release of detached parts of the fastener is prevented. A progressive decrease in the load-bearing capacity of the connection assembly is prevented or at least significantly slowed by the second seal.

[0009] According to a further embodiment, the connecting element can be high-strength concrete or high-strength mortar. The use of high-strength concrete or high-strength mortar, also called "grout," has proven particularly suitable for providing a connection arrangement with sufficient load-bearing capacity. As mentioned, a wind turbine tower can be placed on the connecting pier. During operation, high torques act on the connecting pier and consequently also on the connecting element.

[0010] In a further developed embodiment, the second seal can be designed as an expandable elastomer tube. The use of an expandable elastomer tube leads to simplified installation of the second seal in the overlap space. The elastomer tube can be introduced into the overlap space in a contracted state and pre-positioned there. The elastomer tube is then filled with a flowable substance, such as water, which causes the elastomer tube to expand and thus rest against the support pillar and the connecting pillar with a certain contact pressure. After the elastomer tube has expanded, it can be closed so that the pressure in the elastomer tube can be maintained.The elastomer hose effectively seals the overlap gap, while simultaneously allowing relative movement between the supporting pier and the connecting pier without compromising the sealing effect. The elastomers used to manufacture this elastomer hose can be rigid yet elastically deformable plastics. These plastics can deform under tensile and compressive loads, but subsequently return to their original, undeformed shape.

[0011] In a further developed embodiment, the elastomer hose can be filled with a curable binder. As mentioned, the elastomer hose can be filled with a liquid, especially water, to convert it from the contracted to the expanded state. However, the elastomer hose can lose its tightness due to the influences described above, and in particular due to ice formation. The water would then escape from the elastomer hose, and the elastomer hose would leave the expanded state. The contact pressure would decrease, and the sealing effect would be lost. However, if a curable binder is used, the contact pressure is maintained even if the elastomer hose loses its tightness.

[0012] In a further embodiment, the binder can be a mineral, high-strength ultrafine binder. This can be understood as a cement mortar with a strength of 50 N / mm2 or more and a binder grain size of 0.009 mm or less. The ultrafine binder is pumpable but hardens quickly as soon as it is not moved. This allows the elastomer hose to be converted from the contracted to the expanded state relatively easily, and at the same time, the ultrafine binder hardens quickly without the need for external influences, such as the application of heat. The short curing time simplifies the installation of the second seal, as it is fully operational after curing. Special measures to protect the second seal during curing are not required.

[0013] A further developed embodiment can be characterized in that the support pillar has a diameter of 4 to 10 m and the overlap gap has a gap width of 5 to 15 cm. With these dimensions, the connection arrangement is particularly suitable for offshore wind turbines. Therefore, the present invention also relates to the use of connection arrangements according to one of the previously described embodiments for wind turbines, in particular for offshore wind turbines.

[0014] One embodiment of the invention relates to a method for forming a connection arrangement according to one of the previously discussed embodiments, the method comprising the following steps: Inserting a support pillar into a soil, arranging a connecting pillar relative to the support pillar such that an overlap gap is formed, arranging a first seal in the overlap gap such that the overlap gap is divided into a first section and a second section, inserting a connecting means into the first section and connecting the support pillar and the connecting pillar, and inserting a second seal into the second section.

[0015] The technical effects and advantages that can be achieved with the proposed method essentially correspond to those discussed for the present connection arrangement. The second seal protects the first seal from external influences, in particular from weather influences and mechanical influences caused by water. The probability that the first seal will be damaged or that existing damage will progress is significantly reduced with the second seal. The second seal also reduces the aforementioned influences on the connecting element. Furthermore, the discharge of detached parts of the connecting element is also prevented. A progressive decrease in the load-bearing capacity of the connecting arrangement is prevented or at least significantly slowed by the second seal.

[0016] An embodiment of the invention relates to a method for providing a connecting arrangement according to one of the preceding claims, wherein the connecting arrangement a support pillar which can be or is inserted into a ground, a connecting pillar connected to the support pillar, wherein o the support pillar and the connecting pillar are connected to one another to form an annular overlapping space, and o a first seal is arranged in the overlapping space, which divides the overlapping space into a first section and a second section, and comprises a connecting means arranged in the first section for connecting the support pillar and the connecting pillar, and the method comprises the following steps: introducing a second seal into the second section.

[0017] The second seal can be installed during production. However, in this version of the process, the second seal is subsequently inserted and installed into an existing connection assembly. The second seal can be installed, for example, when the connection assembly is already damaged to counteract a progressive decrease in load-bearing capacity. However, the second seal can also be installed preventively, for example, in connection assemblies that are not yet damaged but are subject to particularly high loads and are therefore susceptible to damage.

[0018] In further training, the procedure may include the following steps: Using an expandable elastomer tube as the second seal, inserting the elastomer tube into the second section such that an overlap region is formed in the circumferential direction, and filling the elastomer tube with a curable binder.

[0019] The installation of the second seal, designed as an expandable elastomer tube, is relatively simple, as the expandable elastomer tube can be inserted into the overlap gap in a contracted state without significant force and then expanded using the curable binder. Once the binder has cured, the contact pressure between the elastomer tube and the supporting pier and the connecting pier is maintained, even if the elastomer tube is damaged.

[0020] As mentioned, the overlap area is ring-shaped. Typically, the supporting pillar and the connecting pillar each have a circular cross-section, so that the overlap area has the cross-sectional shape of a circular ring. Other shapes, in particular elliptical or polygonal shapes, are also conceivable and can also be considered ring-shaped. In the following, however, the overlap area will be shaped like a circular ring. To provide the overlap area, the length of the elastomer hose is dimensioned such that it sweeps through an angle greater than 360° in the overlap area. Therefore, two sections of the elastomer hose are arranged one behind the other in the overlap area. This ensures that the elastomer hose passes through the overlap area at least once in the circumferential direction, thus preventing gaps and leaks.In addition, the accessibility of the end through which the elastomer hose is filled is improved, since the two ends do not have to be in contact with each other.

[0021] In a further embodiment, the elastomer hose may have a first end and a second end and the method may comprise the following steps: Closing the first end by means of a first closure piece, and filling the elastomer tube with the binder through the second end.

[0022] Instead of the first closure piece, the elastomer tube could also be sewn shut at the first end, although this is significantly more laborious than using a single closure piece. However, closing the first end is advantageous in that the binding agent, which converts the elastomer tube from the contracted to the expanded state, cannot escape uncontrollably from the first end. If a liquid is used, closing the second end is also essential for the same reason; otherwise, the elastomer tube would not be able to maintain its expanded state. However, if a fast-curing binding agent is used, closing the second end is not necessary. The use of the second closure piece is also advantageous in this case because it protects the binding agent from external influences.

[0023] One embodiment of the invention relates to a method for renovating a connection arrangement, wherein the connection arrangement a support pillar which can be or is inserted into a ground, a connecting pillar connected to the support pillar, wherein o the support pillar and the connecting pillar are connected to one another to form an annular overlapping space, and o a first seal is arranged in the overlapping space, which divides the overlapping space into a first section and a second section, and has a connecting means arranged in the first section for connecting the support pillar and the connecting pillar, and the method comprises the following steps: producing at least one rehabilitation borehole opening into the overlapping space, and filling the rehabilitation borehole with a hardenable binder.

[0024] This method is particularly useful when the joint assembly has already been damaged. As mentioned, loose pieces of the joint material may form and be carried out, creating voids in the lap joint that are not filled with the joint material. These voids can be located using test drilling or other testing methods. Ideally, the repair holes should open into these voids. By filling the repair holes with a hardenable binder, the joint assembly is strengthened and its load-bearing capacity increased.

[0025] A further design stipulates that the procedure includes the following steps: Inserting a second seal into the second section, wherein the second seal is formed as an elastomer tube, and filling the elastomer tube with the curable binder.

[0026] As mentioned, the second seal protects the connection assembly, and in particular the first seal and the connecting element, from external influences that could cause damage to the connection assembly. In the present embodiment, the connection assembly is already damaged, which is repaired by filling the repair borehole leading into the overlap gap with a hardenable binder. However, it can be assumed that the damage to the connecting element was caused by a defective first seal.

[0027] As a result, the fastener is likely to be damaged again, even if the repair holes are filled with a hardenable binder. Repairing the first seal is typically not possible, or at least not practical. The second seal protects the fastener even if the first seal is damaged. It is also possible to fill the void between the first seal and the second seal with the binder to further increase the load-bearing capacity of the connection arrangement.

[0028] According to a further development, the curable binder is a mineral, high-strength ultrafine binder. In this embodiment, the same ultrafine binder, which was previously defined in more detail, is used for both filling the rehabilitation borehole and transferring the elastomer hose. In addition to the previously described advantageous properties, which also apply to the rehabilitation of existing joint arrangements, the logistics for the rehabilitation and its implementation are simplified by using the same ultrafine binder, which cures relatively quickly.

[0029] Exemplary embodiments of the invention are explained in more detail below with reference to the accompanying drawings. Figure 1A shows a first embodiment of a proposed connecting arrangement, Figure 1B shows a second embodiment of the proposed connecting arrangement, Figure 1C shows a third embodiment of the proposed connecting arrangement, Figure 2A shows a separate illustration of an overlapping gap with an inserted elastomer hose in the contracted state, Figure 2B shows the Figure 2A shown overlap space, in which the elastomer hose is in the expanded state, Figure 3A a plan view of an elastomer hose introduced into the overlap space, Figure 3B a sectional view along the Figure 3A defined section plane AA, Figure 4A a first end of an expandable elastomer tube in the open state, Figure 4B the first end and a second end of the Figure 4Aillustrated expandable elastomer hose in the closed state, Figures 5A to 5E various steps of a method for rehabilitating a connection arrangement, each based on basic representations.

[0030] Figure 1A shows a first embodiment of a connecting arrangement 101 according to the invention based on a basic sectional view. The connecting arrangement 101 comprises a support pillar 12, which is driven into a ground 14 not shown here, in particular into the ground 14 of a body of water such as a seabed (see Figures 2A and 2B ). The upper end of the support pillar 12 protrudes slightly above the water surface (not shown). The support pillar 12 is sleeve- or tubular-shaped and has a support pillar diameter DS (see Figures 2A and 2B). A connecting pier 16, which is also sleeve- or tubular-shaped, has a connecting pier diameter DA. The connecting pier diameter DA, here the connecting pier inner diameter, is larger than the supporting pier diameter DS, here the supporting pier outer diameter. Consequently, the connecting pier 16 can be pushed over the supporting pier 12, creating an overlapping gap 18. The overlapping gap 18 has a gap width BS of between 5 and 15 cm (see Figure 2A ).

[0031] A first seal 20, in this case designed as a sealing lip, is arranged on the inside of the connecting pillar 16. The sealing lip is designed such that it comes into contact with the outer surface of the supporting pillar 12 as the connecting pillar 16 is pushed over the supporting pillar 12. The sealing lip consequently divides the overlap space 18 into a first section 22 and a second section 24. In the assembled state, the first section 22 is arranged above the second section 24. The first section 22 is accessible from above, and the second section 24 from below.

[0032] As mentioned, the support pillar 12 is driven into the seabed, for example. In this case, it is not possible or only possible with unreasonably high effort to align the support pillar 12 vertically. After the connecting pillar 16 has been pushed over the support pillar 12 and inserted into the Figure 1AOnce the connecting pier 16 has been brought into the position shown, it is aligned vertically, and a connecting agent 26, in particular a high-strength concrete or a high-strength mortar, also called "grout," is poured into the first section 22 until the first section 22 is completely filled with the connecting agent 26. The first seal 20 prevents the still liquid or viscous connecting agent 26 from running downwards. After the connecting agent 26 has been poured into the first section 22, it hardens. This hardening process can take up to one month. Once the connecting agent 26 has hardened, the connection between the support pier 12 and the connecting pier 16 is established.

[0033] As mentioned, the second section 24 is accessible from below. Consequently, the first seal 20 is exposed to external influences, particularly those resulting from water, but protects the connecting element 26 against these influences. However, the first seal 20 can be damaged due to these external influences. The connecting element 26 is then no longer protected against these influences and can be damaged and worn out. As a result, the load-bearing capacity of the connection between the supporting pier 12 and the connecting pier 16 can decrease, and in extreme cases, the connection may fail.

[0034] Either during the manufacture of the connection or subsequently, a second seal 28, designed as an expandable elastomer tube 30, is inserted from below into the second section 24. The exact procedure will be discussed in more detail later. The second seal 28 seals the second section 24 and protects the first seal 20 and thus, at least indirectly, the connecting element 26 from external influences.

[0035] Figure 1Bshows a second embodiment of the connection arrangement 102 according to the invention, also based on a basic sectional view. Again, the support pillar 12 is sleeve- or tubular in shape, but the connecting pillar diameter DA is smaller than the supporting pillar diameter DS, in particular than the supporting pillar inner diameter. In this embodiment, the connecting pillar 16 is pushed into the supporting pillar 12. The first seal 20, also designed here as a sealing lip, is attached to the connecting pillar 16. In the second embodiment shown, the connecting pillar 16 is solid, but can also be sleeve- or tubular in shape. To facilitate insertion into the supporting pillar 12, the connecting pillar 16 has a tapered lower conical section 32 at its lower end. The tapered lower conical section 32 has a centering effect when inserted into the supporting pillar 12.

[0036] Otherwise, the connecting arrangement 102 according to the second embodiment is constructed in the same way as the connecting arrangement 101 according to the first embodiment.

[0037] Figure 1Cshows a third embodiment of the connecting arrangement 103 according to the invention, also based on a basic sectional view. The connecting arrangement 101 according to the third embodiment is essentially constructed in the same way as the connecting arrangement 101 according to the first embodiment, but has the following differences: The support pillar 12 has an upper conical section 34 that tapers towards the upper end, while the connecting pillar 16 has a lower conical section 36 that widens towards the lower end. In the third embodiment of the connecting arrangement 103, the upper conical section 34 and the lower conical section 36 also have a centering effect during assembly.Furthermore, a force acting on the connecting means 26 in a compacting manner is introduced into the connecting means 26, which is intended to contribute to maintaining the load-bearing capacity, even if parts of the connecting means 26 have become loose due to the weather influences described above.

[0038] Otherwise, the connecting arrangement 103 according to the third embodiment is constructed in the same way as the connecting arrangement 101 according to the first embodiment.

[0039] Figure 2A shows a part of the overlap gap 18 of the connecting arrangement 101 according to the Figure 1A shown embodiment, in which the expandable elastomer tube 30 is in a contracted state. Figure 2B shows the same part of the overlap space 18, but the expandable elastomer tube 30 is in the expanded state.

[0040] Figure 3Ashows a plan view of an elastomer hose 30 inserted into the overlap space 18 and Figure 3B a sectional view along the Figure 3A defined section plane AA, wherein the elastomer tube 30 is in the expanded state.

[0041] Figure 4A shows a first end 38 of an expandable elastomer tube 30 in the open state and Figure 4B the first end 38 and a second end 40 of the Figure 2A Expandable elastomer tube 30 shown in the closed state. The first end 38 can be closed with a first closure piece 42 and the second end 40 with a second closure piece 44.

[0042] To assemble the second seal 28, proceed as follows: First, the first end 38 of the elastomer tube 30, which is in the contracting state, is closed with the first closure piece 42. Subsequently, the elastomer tube 30 is inserted into the overlapping space 18. As can be seen from the Figures 3A and 3B As can be seen, the elastomer hose 30 is inserted into the overlap space 18 such that it covers an angle of more than 360°. This creates an overlap area 46 in the circumferential direction that is at least 1 to 2 m long.

[0043] Out of Figure 2AIt can be seen that the elastomer hose 30, in its contracted state, lightly touches the support pillar 12 and the connecting pillar 16, so that, on the one hand, it can be introduced into the second section 24 of the overlapping gap 18 with little effort, but, on the other hand, it can be pre-fixed in its position. Subsequently, the elastomer hose 30 is filled with a curable binder 48 through the second end 40, whereby the elastomer hose 30 is converted into the expanded state (see Figure 2B ). In particular from the Figure 2BIt can be seen that the elastomer hose 30 detaches from its approximately circular cross-section in the contracted state and assumes a cross-section in the expanded state that resembles the shape of a rounded rectangle. In the expanded state, the elastomer hose 30 forms relatively large sealing surfaces with the support pillar 12 and the connecting pillar 16, whereby the elastomer hose 30 seals the second section 24 of the overlap gap 18.

[0044] The binding agent 48 hardens after it has been filled into the elastomer tube 30. Consequently, the elastomer tube 30 exerts a permanent contact pressure on the support pillar 12 and the connecting pillar 16, thereby ensuring the sealing effect. The second end 40 of the elastomer tube 30 can be connected to the Figure 4B shown second closure piece 44, but this is not absolutely necessary when using a hardenable binder 48.

[0045] In the Figures 5A to 5E Various steps of a method for rehabilitating a connection arrangement 50 known from the prior art are shown using schematic drawings. The connection arrangement 50 to be rehabilitated is shown in Figure 5A shown and is largely similar to the one in Figure 1A shown connecting arrangement 101 according to the invention, however, the one shown in Figure 5A The connection arrangement 50 shown does not have the second seal 28. As already mentioned, in this case, the second section 24 is open at the bottom and therefore not protected against external influences such as weathering. It will now be assumed that, as a result of the external influences, the first seal 20 and the connecting means 26 are damaged and the load-bearing capacity of the connection is reduced. The damage can be detected, for example, using sensors and / or test bores leading into the connecting means 26 (not shown).

[0046] As from Figure 5B As can be seen, a number of rehabilitation bores 52 leading into the connecting means 26 are made. Figure 5B The rehabilitation boreholes 52 start from the support pillar 12, although it is also conceivable that they start from the connecting pillar 16. Figure 5C It can be seen that the repair holes 52 are now filled with a hardenable binder 48, which strengthens the connecting means 26. Subsequently, the elastomer hose 30 is inserted in the contracted state, as already described, into the second section 24 of the overlap gap 18 and is converted into the expanded state with a hardenable binder 48 (see Figure 5E ). This results in a rehabilitated connection assembly 101 according to the invention. The sequence can also be changed. For example, the second seal 28 can be provided first, followed by the rehabilitative bores 52.

[0047] Not shown is a variant in which a bore is made between the first seal and the second seal 28, leading into the second section 24, and the space between the first seal and the second seal 28 is filled with a curable binder 48. A mineral, high-strength ultrafine binder can be used. List of reference symbols

[0048] 101 - 103 Joint arrangement 12Support pier 14Soil 16Connecting pier 18Overlap gap 20First seal 22First section 24Second section 26Connecting means 28Second seal 30Expandable elastomer hose 32Lower conical section 34Upper conical section 36Lower conical section 38First end 40Second end 42First closure piece 44Second closure piece 46Overlap area 48Binder 50 Joint arrangement 52Rehabilitation bore BSSlot width DAConnecting pier diameter DSSupport pier diameter

Claims

1. A connecting arrangement (101, 102, 103), comprising - a support pillar (12) which is or can be introduced into a ground (14), - a connecting pillar (16) connected to the support pillar (12), wherein o the support pillar (12) and the connecting pillar (16) are connected to one another to form an annular overlapping space (18), and o a first seal (20) is arranged in the overlapping space (18), which seal divides the overlapping space (18) into a first section (22) and a second section (24), - a connecting means (26) arranged in the first section (22) for connecting the support pillar (12) and the connecting pillar (16), and - a second seal (28) arranged in the second section (24).

2. Connecting arrangement (101, 102, 103) according to claim 1, characterized in that the connecting means (26) is a high-strength concrete or a high-strength mortar.

3. Connecting arrangement (101, 102, 103) according to one of claims 1 or 2, characterized in that the second seal (28) is designed as an expandable elastomer tube (30).

4. Connecting arrangement (101, 102, 103) according to claim 3, characterized in that the elastomer hose (30) is filled with a curable binder (48).

5. Connecting arrangement (101, 102, 103) according to claim 4, characterized in that the binder (48) is a mineral, high-strength ultra-fine binder.

6. Connecting arrangement (101, 102, 103) according to one of the preceding claims, characterized in that the support pillar (12) has a support pillar diameter (DS) of 4 to 10 m and the overlap gap (18) has a gap width (BS) of 5 to 15 cm.

7. A method for providing a connection arrangement (101, 102, 103) according to one of the preceding claims, comprising the following steps: - introducing a support pillar (12) into a floor (14), - arranging a connecting pillar (16) relative to the support pillar (12) such that an overlapping space (18) is formed, - arranging a first seal (20) in the overlapping space (18) such that the overlapping space (18) is divided into a first section (22) and a second section (24), - introducing a connecting means (26) into the first section (22) and connecting the support pillar (12) and the connecting pillar (16), and - introducing a second seal (28) into the second section (24).

8. A method for providing a connection arrangement (101, 102, 103) according to one of the preceding claims, wherein the connection arrangement (101, 102, 103) comprises - a support pillar (12) which is or can be introduced into a ground (14), - a connecting pillar (16) connected to the support pillar (12), wherein o the support pillar (12) and the connecting pillar (16) are connected to one another to form an annular overlapping space (18), and o a first seal (20) is arranged in the overlapping space (18), which seal divides the overlapping space (18) into a first section (22) and a second section (24), - a connecting means (26) arranged in the first section (22) for connecting the support pillar (12) and the connecting pillar (16), and the method comprises the following steps: - introducing a second seal (28) into the second section (24).

9. Method according to one of claims 7 or 8, comprising the following steps: - using an expandable elastomer tube (30) as the second seal (28), - introducing the elastomer tube (30) into the second section (24) such that an overlap region is formed in the circumferential direction, and - filling the elastomer tube (30) with a curable binder (48).

10. The method according to claim 9, wherein the elastomeric tube (30) has a first end (38) and a second end (40), comprising the following steps: - closing the first end (38) by means of a first closure piece (42), and - filling the elastomeric tube (30) with the binder (48) through the second end (40), and - closing the second end (40) by means of a second closure piece (44).

11. A method for rehabilitating a connection arrangement (101, 102, 103), wherein the connection arrangement (101, 102, 103) comprises - a support pillar (12) which is or can be inserted into a ground (14), - a connecting pillar (16) connected to the support pillar (12), wherein o the support pillar (12) and the connecting pillar (16) are connected to one another to form an annular overlapping space (18), and o a first seal (20) is arranged in the overlapping space (18), which seal divides the overlapping space (18) into a first section (22) and a second section (24), and - a connecting means (26) arranged in the first section (22) for connecting the support pillar (12) and the connecting pillar (16), and the method comprises the following steps: - manufacturing at least one seal (20) which is inserted into the overlapping space (18) leading rehabilitation borehole (52),and - filling the rehabilitation borehole (52) with a hardenable binder., 12. The method according to claim 11, further comprising the following steps: - introducing a second seal (28) into the second section (24), wherein the second seal (28) is formed as an elastomer tube (30), and - filling the elastomer tube (30) with the curable binder (48).

13. The method according to claim 12, wherein the curable binder (48) is a mineral, high-strength ultrafine binder.

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