Sheet pile arrangement for a sheet pile wall

Abstract

Sheet pile arrangement (1) for a sheet pile wall (2), comprising the sheet pile arrangement (1): - a first outer sheet pile (20), preferably designed as a U-shaped sheet pile, wherein the first outer sheet pile (20) has a longitudinal extension (L2) extending parallel to a driving direction (E), wherein a first coupling means (20a) extending parallel to the longitudinal extension (L2) of the first outer sheet pile (20) is arranged on a first section (20b) of the first outer sheet pile (20), which is configured to form a Larssen lock connection, and wherein a second coupling means (20e) extending along the longitudinal extension (L2) of the first outer sheet pile (20) is arranged on a second section (20d) of the first outer sheet pile (20), which is configured to form a Larssen lock connection, - a second outer sheet pile (30), which is preferably designed as a U-shaped sheet pile, wherein the second outer sheet pile (30) has a longitudinal extension (L3) running parallel to the driving direction (E), - a central sheet pile (10, 10'), preferably designed as a Z-shaped sheet pile, wherein the central sheet pile (10, 10') has a longitudinal extension (L1) extending parallel to the driving direction (E), wherein the central sheet pile (10, 10') is arranged between the first outer sheet pile (20) and the second outer sheet pile (30) and is connected to the first outer sheet pile (20) and to the second outer sheet pile (30), characterized in that a first connecting element (50) is connected to the first coupling means (20a) of the first outer sheet pile (20), wherein the first connecting element (50) has a first connecting section (51) designed to form a positive-locking connection with the first coupling means (20a) of the first outer sheet pile (20),wherein the first connecting section (51) of the first connecting element (50) is positively connected to the first coupling means (20a) of the first outer sheet pile (20), and wherein the first connecting element (50) has a second connecting section (52) which is designed to form a head-claw type connection.

Description

[0001] The invention relates to a sheet pile assembly for a sheet pile wall. Furthermore, the invention relates to a sheet pile wall and a use of a sheet pile assembly.

[0002] Sheet piles and sheet pile walls made of sheet piles are generally known from the state of the art, for example from DE 20 2016 101 909 U1.

[0003] Conventional sheet piles are exposed to high mechanical loads throughout their service life. Sheet piles, in particular, are often subjected to high bending and torsional loads. To withstand these loads, high bending and torsional stiffness, particularly a sufficiently high bending moment and a sufficiently high torsional moment, are required. High stiffness can be achieved, for example, through a large material thickness. However, excessive material thickness is disadvantageous, as the material requirements and mass are then correspondingly large, increasing costs and making the transport and handling of the sheet pile elements more complex.

[0004] One problem with conventional sheet piles is that they typically have rather inflexible connections. This can complicate the design of sheet pile walls, as well as the installation and connection of the sheet piles.

[0005] Another problem with conventional sheet piles and sheet piling is that the sheet piles are typically difficult or impossible to reuse. This is especially true if the sheet piles have been installed in a soil for an extended period of time.

[0006] The invention is therefore based on the object of providing an improved solution that addresses the aforementioned problems. In particular, the object of the invention is to provide a solution by means of which used sheet piles can be reused in a sheet pile assembly.

[0007] According to a first aspect, the object is achieved by a sheet pile arrangement for a sheet pile wall with the features of claim 1. According to this, the sheet pile arrangement comprises: a first outer sheet pile, which is preferably designed as a U-sheet pile, wherein the first outer sheet pile has a longitudinal extent running parallel to a driving direction, wherein on a first section of the first outer sheet pile a first coupling means is arranged which extends parallel to the longitudinal extent of the first outer sheet pile and is designed to produce a Larssen interlock connection, and wherein on a second section of the first outer sheet pile a second coupling means is arranged which extends along the longitudinal extent of the first outer sheet pile and is designed to produce a Larssen interlock connection.The sheet pile assembly further comprises a second outer sheet pile, which is preferably designed as a U-shaped sheet pile, wherein the second outer sheet pile has a longitudinal extension running parallel to the driving direction. The sheet pile assembly further comprises a central sheet pile, which is preferably designed as a Z-shaped sheet pile, wherein the central sheet pile has a longitudinal extension running parallel to the driving direction, wherein the central sheet pile is arranged between the first outer sheet pile and the second outer sheet pile and is connected to the first outer sheet pile and to the second outer sheet pile.

[0008] According to the invention, it is provided that a first connecting element is connected to the first coupling means of the first outer sheet pile, wherein the first connecting element has a first connecting portion which is designed to produce a positive connection with the first coupling means of the first outer sheet pile, wherein the first connecting portion of the first connecting element is positively connected to the first coupling means of the first outer sheet pile, and wherein the first connecting element has a second connecting portion which is designed to produce a head-claw type connection.

[0009] A sheet pile arrangement with three sheet piles is therefore proposed, wherein a connecting element is arranged on one of the three sheet piles, which connecting element forms a positive connection by means of a first connecting section of the connecting element with a coupling means of this sheet pile, which is designed to produce a Larssen lock connection, and which has a second connecting section which is designed to produce a head-claw type connection.

[0010] One advantage of such a sheet pile assembly is that a head-claw type connection can be established with the sheet pile assembly by means of the first connecting element. For example, a sheet pile with a head-claw type connecting section can be connected to the connecting element, and thus to the sheet pile assembly.

[0011] A further advantage of such a sheet pile arrangement is that the possibility of creating a head-claw type connection with the sheet pile arrangement increases flexibility, as Larssen interlock connections are typically significantly tighter than head-claw type connections. This allows for more flexible sheet pile wall designs with the proposed sheet pile arrangement. For example, another sheet pile arrangement, which also has a connecting section that enables a head-claw type connection, can be connected to the connecting element and arranged at a somewhat more flexible angle relative to the sheet pile arrangement, since the head-claw type connection then created is not as tight as a Larssen interlock type connection.

[0012] A further advantage is that the sheet pile assembly exhibits better mechanical properties compared to a sheet pile assembly without the first connecting element. In particular, the connecting element can improve the mechanical properties, particularly the stiffness and strength, of the connection to another sheet pile assembly or to another sheet pile, since a head-claw type connection generally exhibits better mechanical properties than a Larssen interlock connection.

[0013] A further advantage is that used sheet piles can be used particularly advantageously for the sheet pile assembly described. By renewing the connecting section using the first connecting element, which converts the first coupling element of the second outer sheet pile—possibly defective due to previous use or no longer optimally usable—from a Larssen-lock connection into a head-claw connection, a new and mechanically high-quality connecting element can be provided on the sheet pile assembly, to which another sheet pile or another sheet pile assembly, which may also comprise one or more used sheet piles, can be connected.

[0014] Due to the tight connection, Larssen interlock connections are typically not very reusable, if at all. Head-claw connections, on the other hand, are significantly more reusable and significantly more durable, so the proposed sheet pile arrangement also exhibits improved reusability and a longer service life.

[0015] A driving direction is understood in particular to be the direction in which a sheet pile wall is driven into the subsoil, and thus also the components extending along a sheet pile wall, in particular the sheet piles, are driven into the subsoil. Driving into the subsoil is carried out in particular by ramming the sheet pile wall into the ground. In the majority of cases, the driving direction is perpendicular to the ground surface. The driving direction is therefore usually vertical when installed. However, there are also driving directions that run parallel to the horizontal, for example when sheet piles or sheet piles for sheet pile walls are driven into mountains or hills, for example to support a tunnel. Driving directions that have a horizontal and a vertical component are also possible, for example if the sheet pile wall is to be driven at an angle to the ground surface.The driving direction corresponds in particular to the longitudinal direction of the sheet pile wall.

[0016] In the context of the present disclosure, a longitudinal extension of a sheet pile is understood to mean the extension in the driving direction or parallel to the driving direction.

[0017] A sheet pile wall extension direction is understood to mean, in particular, a direction in which the sheet pile wall or a section of the sheet pile wall extends transversely to the longitudinal extension. The sheet pile wall extension direction thus extends orthogonally to the driving direction.

[0018] Within the scope of the present disclosure, it is preferred if the cross-section of the sheet piles of the sheet pile assembly and the cross-section of the connecting elements of the sheet pile assembly are each substantially constant along the longitudinal extent. In particular, it is preferred if all elements of the sheet pile assembly have a cross-section that is substantially constant along the longitudinal extent.

[0019] It is preferred that the sheet piles of the sheet pile assembly, i.e., the first outer sheet pile, the second outer sheet pile, and the central sheet pile, as well as the first connecting element, each comprise or consist of steel. In particular, it is preferred that all structural elements of the sheet pile assembly comprise or consist of steel.

[0020] The sheet piles can be hot-rolled or cold-rolled.

[0021] The coupling means of the first outer sheet pile, the coupling means of the second outer sheet pile and the coupling means of the central sheet pile extend in the direction of the respective longitudinal extent, preferably parallel to each other.

[0022] A U-sheet pile is understood in particular to be a sheet pile which has a substantially U-shaped cross-section. In particular, a U-sheet pile has a straight central section and two further sections extending from the central section, namely the first and second sections of the first outer sheet pile and the second outer sheet pile, which can also be referred to as flanges. The first section preferably extends substantially straight and is preferably oriented at an angle of more than 90° and less than 160° to the central section. The second section preferably extends substantially straight and is preferably oriented at an angle of more than 90° and less than 160° to the central section.

[0023] The open side of a U-sheet pile is the side on which the U formed by the U-sheet pile is open.

[0024] A Z-sheet pile is understood, in particular, to mean a sheet pile having a cross-section with a shape similar to the letter Z. In particular, the Z-sheet pile has two straight sections, which can also be referred to as flanges and which are aligned parallel to one another, namely the first section and the second section of the central sheet pile, and a middle section which runs obliquely to the first and the second section and which is preferably also straight.

[0025] A coupling means is understood in particular to mean a connecting section of a sheet pile, wherein a coupling means is particularly designed to establish a positive connection with another coupling means, which can be arranged on a sheet pile or a connecting element. The coupling means are preferably designed to establish a Larssen interlock connection. A Larssen interlock is a form of interlock connection known and widespread in the field of sheet piling, with which, for example, sheet piles can be connected to one another. The coupling means are preferably arranged at the two end sections of the first and second sections, such that the first section, the middle section, and the second section of the respective sheet pile are arranged between the coupling means.

[0026] The first connecting element is understood in particular to be a component which is designed to produce a positive connection, in particular a Larssen lock connection, with a coupling means of a sheet pile by means of the first connecting section of the first connecting element. The first connecting element is preferably designed to be connected to a U-sheet pile or to a Z-sheet pile. To form such a connection with a sheet pile, the first connecting element has the first connecting section. The first connecting element further has a second connecting section. However, the second connecting section is not designed to produce a Larssen lock connection, but rather to produce a head-claw type connection.

[0027] A head-claw type connection is understood, in particular, to mean a connection for connecting a first connecting element of a first sheet pile assembly to a second connecting element of a second sheet pile assembly. Preferably, two adjacent sheet pile assemblies are connected to one another by means of such a head-claw type connection.

[0028] Ball-and-socket connections are known in English as "ball and socket" connections. These "ball and socket" connections are characterized by the fact that a female socket is engaged with a male ball head to connect two fasteners or a fastener to a sheet pile or two sheet piles.

[0029] The sheet pile arrangement can in particular form a partial section of a sheet pile wall.

[0030] The sheet pile arrangement preferably comprises exactly three sheet piles, namely the first outer sheet pile, the second outer sheet pile, and the central sheet pile. The sheet pile arrangement preferably does not comprise any further sheet piles. The first outer sheet pile and the second outer sheet pile are preferably designed as U-sheet piles, and the central sheet pile is preferably designed as a Z-sheet pile. Such sheet pile arrangements comprising precisely these three sheet piles can be arranged next to one another and connected to one another in such a way that each U-sheet pile is arranged adjacent to a U-sheet pile and a Z-sheet pile, and each Z-sheet pile is arranged adjacent to two U-sheet piles. Such an arrangement makes it possible to achieve particularly advantageous mechanical properties, in particular high rigidity.Another advantage is that U-sheet piles are generally easier to manufacture and cheaper, so that the sheet pile arrangement as a whole is relatively easy to manufacture and relatively inexpensive to implement.

[0031] It is particularly preferred that a first coupling means extending parallel to the longitudinal extent of the second outer sheet pile is arranged on a first section of the second outer sheet pile and is designed to produce a Larssen lock connection, and wherein a second coupling means extending along the longitudinal extent of the second outer sheet pile is arranged on a second section of the second outer sheet pile and is designed to produce a Larssen lock connection.

[0032] The first outer sheet pile and the second outer sheet pile are preferably of identical design.

[0033] It is particularly preferred that a second connecting element is connected to the second coupling means of the second outer sheet pile, wherein the second connecting element has a first connecting portion which is designed to establish a positive connection with the second coupling means of the second outer sheet pile, wherein the first connecting portion of the second connecting element is positively connected to the second coupling means of the second outer sheet pile, and wherein the second connecting element has a second connecting portion which is designed to establish a head-claw type connection.

[0034] The second connecting element is understood in particular to be a component that is designed to create a positive connection, in particular a Larssen lock connection, with a coupling means of a sheet pile by means of the first connecting section of the second connecting element. The second connecting element is preferably designed to be connected to a U-sheet pile or to a Z-sheet pile. To create such a connection with a sheet pile, the second connecting element has the first connecting section. The second connecting element further has a second connecting section. However, the second connecting section is not designed to create a Larssen lock connection, but rather to create a head-claw type connection.

[0035] Preferably, the first connecting portion of the first connecting element and the first connecting portion of the second connecting element are identical. Preferably, the second connecting portion of the first connecting element and the second connecting portion of the second connecting element are not identical. Preferably, one of the two second connecting portions is claw-shaped, and one of the two second connecting portions is head-shaped.

[0036] Preferably, the second connecting portion of the second connecting element is head-shaped or claw-shaped to produce a head-claw type connection.

[0037] It is particularly preferred that the second connecting portion of the first connecting element is head-shaped and the second connecting portion of the second connecting element is claw-shaped, or that the second connecting portion of the first connecting element is claw-shaped and the second connecting portion of the second connecting element is head-shaped.

[0038] Preferably, therefore, the second connecting portion of the first connecting element and the second connecting portion of the second connecting element are not identical. Preferably, the second connecting portion of the first connecting element and the second connecting portion of the second connecting element are configured such that these two second connecting portions together form the two different connecting elements, namely a claw-shaped and a head-shaped connecting element, of a head-claw type connection.

[0039] It is particularly preferred that the longitudinal extension of the central sheet pile extends from the upper end of the central sheet pile to the lower end of the central sheet pile.

[0040] The longitudinal extension of the central sheet pile can therefore be understood as the length from the upper end to the lower end of the central sheet pile.

[0041] It is particularly preferred that the longitudinal extension of the first outer sheet pile extends from the upper end of the first outer sheet pile to the lower end of the first outer sheet pile.

[0042] The longitudinal extension of the first outer sheet pile can therefore be understood as the length from the upper end to the lower end of the first outer sheet pile.

[0043] It is particularly preferred that the longitudinal extension of the second outer sheet pile extends from the upper end of the second outer sheet pile to the lower end of the second outer sheet pile.

[0044] The longitudinal extension of the second outer sheet pile can therefore be understood as the length from the upper end to the lower end of the second outer sheet pile.

[0045] It is particularly preferred that the central sheet pile has a first section on which a first coupling means extending along the longitudinal extent of the central sheet pile is arranged, and wherein the central sheet pile has a second section on which a second coupling means extending along the longitudinal extent of the central sheet pile is arranged.

[0046] It is particularly preferred that the first outer sheet pile on the side of the first coupling means of the central sheet pile is connected to the central sheet pile directly or by means of a third connecting element.

[0047] The third connecting element is understood in particular to be a component that is designed to connect two coupling means to one another. The third connecting element is preferably designed to connect a U-sheet pile with a Z-sheet pile or with a U-sheet pile. The third connecting element is understood in particular not to be a sheet pile. The third connecting element is, in its extension transverse to the longitudinal extension, preferably many times smaller than the sheet piles present in the sheet pile arrangement. The third connecting element can, for example, have a cross-section that is shaped essentially like the lowercase letter omega. However, the third connecting element can also have a different shape.

[0048] It is particularly preferred that the second outer sheet pile on the side of the second coupling means of the central sheet pile is connected to the central sheet pile directly or by means of a fourth connecting element.

[0049] The fourth connecting element is understood in particular to be a component that is designed to connect two coupling means to one another. The fourth connecting element is preferably designed to connect a U-sheet pile with a Z-sheet pile or with a U-sheet pile. The fourth connecting element is understood in particular not to be a sheet pile. The fourth connecting element is, in its extension transverse to the longitudinal extension, preferably many times smaller than the sheet piles present in the sheet pile arrangement. The fourth connecting element can, for example, have a cross-section that is shaped essentially like the lowercase letter omega. However, the fourth connecting element can also have a different shape.

[0050] It is particularly preferred that the first coupling means of the central sheet pile is designed to produce a Larssen lock connection.

[0051] Preferably, the first coupling means of the central sheet pile and the second coupling means of the first outer sheet pile are connected to each other by means of a Larssen lock connection.

[0052] It is particularly preferred that the second coupling means of the central sheet pile is designed to produce a Larssen lock connection.

[0053] Preferably, the second coupling means of the central sheet pile and the first coupling means of the second outer sheet pile are connected to each other by means of a Larssen lock connection.

[0054] It is particularly preferred that the first outer sheet pile is designed as a U-sheet pile and the second outer sheet pile is designed as a U-sheet pile, and wherein the first outer sheet pile and the second outer sheet pile are arranged such that the open side of the first outer sheet pile and the open side of the second outer sheet pile point in different directions.

[0055] Preferably, the open side of the first outer sheet pile and the open side of the second outer sheet pile are each arranged so as to be curved outward. Preferably, the second outer sheet pile is arranged rotated by 180° relative to the first outer sheet pile about an axis running parallel to the longitudinal extension.

[0056] One advantage of such a sheet pile arrangement is that, with an arrangement of U-shaped sheet piles curved outwards, very high bending and torsional rigidity can be achieved. This makes it particularly advantageous to provide a sheet pile arrangement that can reliably withstand particularly high loads over a long period of time, while still maintaining a relatively low material thickness, thus reducing material requirements.

[0057] It is particularly preferred that the first outer sheet pile is a hot-rolled U-shaped sheet pile. It is particularly preferred that the second outer sheet pile is a hot-rolled U-shaped sheet pile. It is particularly preferred that the central sheet pile is a hot-rolled or cold-rolled Z-shaped sheet pile.

[0058] It is particularly preferred that the longitudinal extent of the central sheet pile deviates from the longitudinal extent of the first outer sheet pile and from the longitudinal extent of the second outer sheet pile.

[0059] It was surprisingly found that with a shorter length of the central sheet pile compared to the first outer sheet pile and the second outer sheet pile, essentially the same mechanical properties can be achieved for the sheet pile driven into a soil as in the normal case in which all sheet piles are of the same length.

[0060] A particular advantage is that, if the central sheet pile is made shorter, there is essentially no deterioration in the mechanical properties; in particular, the stiffness of the sheet pile wall remains essentially unchanged. Furthermore, less material is required for the sheet pile wall because the central sheet pile wall is made shorter. This allows for a particularly advantageous reduction in material requirements.

[0061] Preferably, the longitudinal extent of the first outer sheet pile and the longitudinal extent of the second outer sheet pile are substantially equal in length. This allows a particularly advantageous way to achieve a symmetrical load profile for a sheet pile wall constructed from multiple sheet pile arrangements.

[0062] It is particularly preferred that the longitudinal extent of the central sheet pile deviates from the longitudinal extent of the first outer sheet pile by at least 5%, preferably at least 10%, particularly preferably at least 15%, in particular at least 20%, and is preferably shorter than the longitudinal extent of the first outer sheet pile. The longitudinal extent of the central sheet pile preferably deviates from the longitudinal extent of the first outer sheet pile by at most 50%.

[0063] It is particularly preferred that the longitudinal extent of the central sheet pile deviates from the longitudinal extent of the second outer sheet pile by at least 5%, preferably at least 10%, particularly preferably at least 15%, in particular at least 20%, and is preferably shorter than the longitudinal extent of the second outer sheet pile. The longitudinal extent of the central sheet pile preferably deviates from the longitudinal extent of the second outer sheet pile by at most 50%.

[0064] In particular, it was surprisingly found that with a length of the central sheet pile that is up to 20% shorter than that of the first outer sheet pile and the second outer sheet pile, essentially the same mechanical properties can be achieved for the sheet pile driven into a soil as in the normal case in which all sheet piles are of the same length.

[0065] According to a further aspect, the object mentioned at the outset is achieved by a sheet pile wall comprising a plurality of sheet pile assemblies as described here, wherein the sheet pile assemblies each comprise exactly three sheet piles, namely the central sheet pile and the first outer sheet pile and the second outer sheet pile, wherein the sheet pile assemblies are arranged next to one another and connected to one another in such a way that in each case the first connecting element of a sheet pile assembly of the sheet pile assemblies is connected to the second connecting element of a further sheet pile assembly of the sheet pile assemblies.

[0066] Preferably, no further sheet piles are arranged between the sheet pile arrangements, each of which comprises three sheet piles, namely the central sheet pile and the first outer sheet pile and the second outer sheet pile. This preferably provides a sheet pile wall in which the sheet piles and the first and second connecting elements are arranged next to one another along the sheet pile wall extension direction as follows (optionally, third and / or fourth connecting elements may also be present, which are not mentioned below): first connecting element - first outer sheet pile - central sheet pile - second outer sheet pile - second connecting element - first connecting element - first outer sheet pile - central sheet pile - second outer sheet pile - second connecting element.The connection between the first connecting element and the second connecting element, which are arranged next to each other, is designed as a head-claw type connection.

[0067] According to a further aspect, the object mentioned at the outset is achieved by using a sheet pile arrangement as described here and / or a sheet pile wall as described here, wherein the first outer sheet pile of the sheet pile arrangement, and preferably the second outer sheet pile of the sheet pile arrangement, and preferably the central sheet pile of the sheet pile arrangement, were driven into a ground before assembly of the sheet pile arrangement, in particular over a prolonged period of time, preferably at least one month, particularly preferably at least 1 year, and were then removed from the ground, wherein the first connecting element and the second connecting element of the sheet pile arrangement were not driven into a ground for a prolonged period of time, in particular not at all, before assembly of the sheet pile arrangement.

[0068] Using at least one used sheet pile offers several advantages. At least not all of the sheet piles need to be replaced, and in some cases, none of them need to be replaced at all. This can be a particularly advantageous way to save and / or reduce costs, time, labor, and CO2 emissions.

[0069] According to a further aspect, the object mentioned at the outset is achieved by a method for producing a sheet pile arrangement as described here and / or a sheet pile wall as described here, the method comprising: providing a first outer sheet pile, which is preferably designed as a U-sheet pile, wherein the first outer sheet pile has a longitudinal extent running parallel to a driving direction, wherein a first coupling means extending parallel to the longitudinal extent of the first outer sheet pile is arranged on a first section of the first outer sheet pile and is designed to produce a Larssen lock connection, and wherein a second coupling means extending along the longitudinal extent of the first outer sheet pile is arranged on a second section of the first outer sheet pile and is designed to produce a Larssen lock connection;Providing a second outer sheet pile, preferably designed as a U-shaped sheet pile, wherein the second outer sheet pile has a longitudinal extension running parallel to the driving direction; Providing a central sheet pile, preferably designed as a Z-shaped sheet pile, wherein the central sheet pile has a longitudinal extension running parallel to the driving direction;Providing a first connecting element connected to the first coupling means of the first outer sheet pile, wherein the first connecting element has a first connecting portion configured to establish a positive connection with the first coupling means of the first outer sheet pile, wherein the first connecting portion of the first connecting element is positively connected to the first coupling means of the first outer sheet pile, and wherein the first connecting element has a second connecting portion configured to establish a head-claw type connection; assembling the first outer sheet pile, the central sheet pile, and the second outer sheet pile to form a sheet pile assembly as described herein and / or to form a sheet pile wall as described herein;

[0070] It is particularly preferred that the first outer sheet pile of the sheet pile arrangement, and preferably the second outer sheet pile of the sheet pile arrangement, and preferably the central sheet pile of the sheet pile arrangement, was driven into a ground before assembly of the sheet pile arrangement, in particular over a longer period of time, preferably at least one month, particularly preferably at least 1 year, and was subsequently removed from the ground, wherein the first connecting element and the second connecting element of the sheet pile arrangement were not driven into a ground for a longer period of time, in particular not at all, before assembly of the sheet pile arrangement.

[0071] Such a process offers several advantages. At least not all sheet piles need to be rebuilt, and in some cases none need to be rebuilt at all. This is a particularly advantageous way to save and / or reduce costs, time, labor, and CO2 emissions while still providing a high-quality sheet pile wall.

[0072] It is particularly preferred that the first coupling means of the first outer sheet pile is cleaned and / or machined, in particular by milling, before assembly.

[0073] An advantage of machining the first coupling means of the first outer sheet pile is that damaged and / or no longer usable coupling means can thereby be made usable again, so that the first connecting element can be connected to the first coupling means of the first outer sheet pile and thus a head-claw type connection can be made to the sheet pile arrangement by connecting a further connecting element to the first connecting element.

[0074] It is particularly preferred that the second coupling means of the second outer sheet pile is cleaned and / or machined, in particular by milling, before assembly.

[0075] An advantage of machining the second coupling means of the second outer sheet pile is that damaged and / or no longer usable coupling means can thereby be made usable again, so that the second connecting element can be connected to the first coupling means of the second outer sheet pile and thus a head-claw type connection can be made to the sheet pile arrangement by connecting a further connecting element to the second connecting element.

[0076] For the advantages, design variants and design details of the various aspects of the solutions described here and their respective possible further developments, reference is also made to the description of the corresponding features, details and advantages of the other aspects and their further developments.

[0077] Preferred embodiments are explained by way of example with reference to the accompanying figures. The drawings are not necessarily to scale. In the figures, identical or essentially functionally identical or similar elements are designated by the same reference numerals. They show: Fig. 1a: a schematic cross-sectional view of a first embodiment of a sheet pile arrangement; Fig. 1b: a detailed view of the Fig. 1a shown first connecting element; Fig. 1c: a detailed view of the Fig. 1a shown second connecting element; Fig. 2: a perspective view of the Fig. 1 shown sheet pile arrangement; Fig. 3a: a schematic cross-sectional view of a second embodiment of a sheet pile arrangement; Fig. 3b: a detailed view of the Fig. 3a shown first connecting element; Fig. 3c: a detailed view of the Fig. 3a shown second connecting element; Fig. 4: a perspective view of the Fig. 3 sheet pile arrangement shown; Fig. 5a: a schematic cross-sectional view of two interconnected sheet pile assemblies; Fig. 5b: a detailed view of the Fig. 5a shown connection between the first connecting element and the second connecting element; Fig. 6: a schematic cross-sectional view of a third embodiment of a sheet pile arrangement; Fig. 7: a perspective view of the Fig. 6 shown sheet pile arrangement; Fig. 8a: a schematic cross-sectional view of a fourth embodiment of a sheet pile arrangement; Fig. 8b: a perspective view of the Fig. 8a shown sheet pile arrangement; Fig. 9: a schematic cross-sectional view of a sheet pile wall; Fig. 10: a schematic representation of a method for producing a sheet pile arrangement and / or a sheet pile wall.

[0078] Fig. 1a shows a schematic cross-sectional view of a first embodiment of a sheet pile arrangement 1. The sheet pile arrangement 1 extends parallel to the longitudinal extent E in a direction perpendicular to the plane of the drawing.

[0079] The sheet pile assembly 1 has a first outer sheet pile 20. The first outer sheet pile is designed as a U-shaped sheet pile, wherein the U-shaped sheet pile is arranged such that it is curved outwards relative to the center line S, which is arranged parallel to a sheet pile wall extension direction. The opening 21 of the first outer sheet pile therefore points in the direction of the center line S. The first outer sheet pile 20 has a longitudinal extension running parallel to the driving direction E. A first coupling means 20a extending parallel to the longitudinal extension of the first outer sheet pile 20 is arranged on a first section 20b of the first outer sheet pile 20. This first coupling means 20a is designed to create a Larssen interlock connection. A second coupling means 20e extending along the longitudinal extent of the first outer sheet pile 20 is arranged on a second section 20d of the first outer sheet pile 20.This second coupling means 20e is designed to establish a Larssen lock connection. A middle section 20c is arranged between the first section 20b and the second section 20d.

[0080] The sheet pile arrangement 1 also has a second outer sheet pile 30. The second outer sheet pile is also designed as a U-shaped sheet pile, wherein the U-shaped sheet pile is arranged such that it is curved outwards relative to the center line S, which is arranged parallel to a sheet pile wall extension direction. The opening 31 of the second outer sheet pile therefore points in the direction of the center line S. The second outer sheet pile is therefore arranged rotated by 180° relative to the first outer sheet pile about an axis running parallel to the longitudinal extension. The second outer sheet pile 30 has a longitudinal extension running parallel to the driving direction E. A first coupling means 30a extending parallel to the longitudinal extension of the first outer sheet pile 30 is arranged on a first section 30b of the second outer sheet pile 30. This first coupling means 30a is designed to establish a Larssen lock connection.A second coupling means 30e extending along the longitudinal extent of the second outer sheet pile 30 is arranged on a second section 30d of the second outer sheet pile 30. This second coupling means 30e is designed to establish a Larssen lock connection. A central section 30c is arranged between the first section 30b and the second section 30d.

[0081] The sheet pile arrangement 1 also has a central sheet pile 10, which is arranged between the first outer sheet pile 20 and the second outer sheet pile 30 and is connected to these two sheet piles. The central sheet pile 10 is designed as a Z-sheet pile, wherein the Z-sheet pile is arranged such that it extends through the center line S. The central sheet pile 10 has a longitudinal extension running parallel to the driving direction E. On a first section 10b of the central sheet pile 10, a first coupling means 10a is arranged, extending parallel to the longitudinal extension of the central sheet pile 10. This first coupling means 10a is designed to create a Larssen interlock connection. A second coupling means 10e extending along the longitudinal extent of the central sheet pile 10 is arranged on a second section 10d of the central sheet pile 10.This second coupling means 10e is designed to establish a Larssen lock connection. A middle section 10c is arranged between the first section 10b and the second section 10d.

[0082] In the exemplary embodiment shown here, a third connecting element 40 is provided for the connection between the first outer sheet pile 20 and the central sheet pile 10, which third connecting element has a first coupling means 41 and a second coupling means 42, wherein the first coupling means 41 of the third connecting element 40 forms a positive connection with the second coupling means 20e of the first outer sheet pile 20 and the second coupling means 42 of the third connecting element 40 forms a positive connection with the first coupling means 10a of the central sheet pile 10.

[0083] In the exemplary embodiment shown here, however, no further connecting element is provided for the connection between the central sheet pile 10 and the second outer sheet pile 30.

[0084] As in Fig. 1a and Fig. As shown in Figure 1b (Detail A), a first connecting element 50 is provided, which has a first connecting portion 51 and a second connecting portion 52. The first connecting portion 51 of the first connecting element 50 is positively connected to the first coupling means 20a of the first outer sheet pile 20. The second connecting portion 52 of the first connecting element 50 is designed to create a head-claw type connection. For this purpose, the second connecting portion 52 of the first connecting element 50 is head-shaped, so that the second connecting portion 52 of the first connecting element 50 can form a head-claw type connection with a claw-shaped connecting portion.

[0085] As in Fig. 1a and Fig. 1c (Detail B), a second connecting element 60 is provided, which has a first connecting portion 61 and a second connecting portion 62. The first connecting portion 61 of the second connecting element 60 is positively connected to the second coupling means 30e of the second outer sheet pile 30. The second connecting portion 62 of the second connecting element 60 is designed to establish a head-claw type connection. For this purpose, the second connecting portion 62 of the second connecting element 60 is claw-shaped and has an opening 62a, so that the second connecting portion 62 of the second connecting element 60 can form a head-claw type connection with a head-shaped connecting portion.

[0086] Fig. 2 shows a perspective view of the Fig. 1. The central sheet pile 10 extends along the longitudinal extension L1. The first outer sheet pile 20 extends along the longitudinal extension L2. The second outer sheet pile 30 extends along the longitudinal extension L3. The third connecting element 40 extends along the longitudinal extension L4. The first connecting element 50 extends along the longitudinal extension L5. The second connecting element 60 extends along the longitudinal extension L6. The longitudinal extensions L1, L2, L3, L4, L5, L6 are arranged parallel to one another and parallel to the driving direction.

[0087] Fig. 3a shows a schematic cross-sectional view of a second embodiment of a sheet pile arrangement 1. For this second embodiment, the above applies to the first embodiment in connection with the Fig. 1a, Fig. 1b, Fig. 1c and 2. In contrast to the first embodiment, in this embodiment the shapes of the sheet piles 10, 20, 30 and the third connecting element 40 are merely slightly different. However, here too the first outer sheet pile 20 is a U-shaped sheet pile, the second outer sheet pile 30 is a U-shaped sheet pile, and the central sheet pile 10 is a Z-shaped sheet pile, whereby these sheet piles 10, 20, 30 and the third connecting element 40 are designed as in connection with the Fig. 1a, Fig. 1b, Fig. 1c and 2 are described.

[0088] As in Fig. 3a and Fig. As shown in Figure 3b (Detail A), a first connecting element 50 is provided, which has a first connecting portion 51 and a second connecting portion 52. The first connecting portion 51 of the first connecting element 50 is positively connected to the first coupling means 20a of the first outer sheet pile 20. The second connecting portion 52 of the first connecting element 50 is designed to create a head-claw type connection. For this purpose, the second connecting portion 52 of the first connecting element 50 is claw-shaped and has an opening 52a, such that the second connecting portion 52 of the first connecting element 50 can form a head-claw type connection with a head-shaped connecting portion.

[0089] As in Fig. 3a and Fig. As shown in Figure 3c (Detail B), a second connecting element 60 is provided, which has a first connecting portion 61 and a second connecting portion 62. The first connecting portion 61 of the second connecting element 60 is positively connected to the second coupling means 30e of the second outer sheet pile 30. The second connecting portion 62 of the second connecting element 60 is designed to create a head-claw type connection. For this purpose, the second connecting portion 62 of the second connecting element 60 is head-shaped, so that the second connecting portion 62 of the second connecting element 60 can form a head-claw type connection with a claw-shaped connecting portion.

[0090] Fig. 4 shows a perspective view of the Fig. 3. The central sheet pile 10 extends along the longitudinal extension L1. The first outer sheet pile 20 extends along the longitudinal extension L2. The second outer sheet pile 30 extends along the longitudinal extension L3. The third connecting element 40 extends along the longitudinal extension L4. The first connecting element 50 extends along the longitudinal extension L5. The second connecting element 60 extends along the longitudinal extension L6. The longitudinal extensions L1, L2, L3, L4, L5, L6 are arranged parallel to one another and parallel to the driving direction.

[0091] Fig. Figure 5a shows a schematic cross-sectional view of two interconnected sheet pile assemblies 1. The sheet pile assemblies 1 are identically constructed. The sheet pile assemblies 1 are designed as described in connection with the second embodiment described above and are interconnected along the mirror plane E1.

[0092] Fig. 5b shows a detailed view of the Fig. 5a shows the connection between the first connecting element 50 of one sheet pile assembly 1 and the second connecting element 60 of the other sheet pile assembly 1. The connecting elements 50 and 60 are connected to one another in such a way that a head-claw type connection is formed.

[0093] Fig. Figure 6 shows a schematic cross-sectional view of a third embodiment of a sheet pile assembly 1. The above statements regarding the first embodiment apply accordingly to this third embodiment. However, unlike the first embodiment, the central sheet pile 10 is not designed as a hot-rolled sheet pile, but rather as a cold-rolled sheet pile with a first section 10b', a middle section 10c', and a second section 10d', as well as with a first coupling means 10a' and a second coupling means 10e'.

[0094] Fig. 7 shows a perspective view of the Fig. 6 shown sheet pile arrangement 1.

[0095] Fig. Figure 8a shows a schematic cross-sectional view of a fourth embodiment of a sheet pile assembly 1. In this embodiment, in contrast to the first, second, and third embodiments, no third connecting element is provided, so that the central sheet pile 10 is directly connected to the first outer sheet pile 20 and directly to the second outer sheet pile 30. A further difference from the first, second, and third embodiments is that - as shown in the perspective view in Fig. 8b - the longitudinal extension L1 of the central sheet pile 10 is 20% shorter than the longitudinal extension L2 of the first outer sheet pile 20 and than the longitudinal extension L3 of the second outer sheet pile 30. With regard to the basic structure, what has been said for the first and second embodiments applies accordingly.

[0096] Fig. Figure 9 shows a schematic cross-sectional view of a sheet pile wall 2 comprising a plurality of interconnected sheet pile assemblies 1 and extending along the sheet pile wall extension direction R. The sheet pile assemblies 1 of the sheet pile wall 2 are interconnected along the mirror planes E1. The sheet pile assemblies 1 can be designed as described above with reference to the embodiments of the sheet pile assembly 1. The sheet piles are as described in connection with Fig. 5a and Fig. 5b described.

[0097] Fig.10 shows a schematic representation of a method 100 for producing a sheet pile arrangement 1 and / or a sheet pile wall 2. The method 100 comprises the following steps: In a step 110, providing a first outer sheet pile 20, which is preferably designed as a U-sheet pile, wherein the first outer sheet pile 20 has a longitudinal extent L2 running parallel to a driving direction E, wherein on a first section 20b of the first outer sheet pile 20, a first coupling means 20a is arranged, which extends parallel to the longitudinal extent L2 of the first outer sheet pile 20 and is designed to produce a Larssen lock connection, and wherein on a second section 20d of the first outer sheet pile 20, a second coupling means 20e is arranged, which extends along the longitudinal extent L2 of the first outer sheet pile 20 and is designed to produce a Larssen-Lock connection.In a step 120, providing a second outer sheet pile 30, which is preferably designed as a U-shaped sheet pile, wherein the second outer sheet pile 30 has a longitudinal extension L3 running parallel to the driving direction E. In a step 130, providing a central sheet pile 10, 10', which is preferably designed as a Z-shaped sheet pile, wherein the central sheet pile 10, 10' has a longitudinal extension L1 running parallel to the driving direction E.In a step 140, providing a first connecting element 50 connected to the first coupling means 20a of the first outer sheet pile 20, wherein the first connecting element 50 has a first connecting portion 51 designed to establish a positive connection with the first coupling means 20a of the first outer sheet pile 20, wherein the first connecting portion 51 of the first connecting element 50 is positively connected to the first coupling means 20a of the first outer sheet pile 20, and wherein the first connecting element 50 has a second connecting portion 52 designed to establish a head-claw type connection. In a step 150, assembling the first outer sheet pile 20 and the central sheet pile 10 and the second outer sheet pile 30 to form a sheet pile arrangement 1 and / or a sheet pile wall.In this case, the first outer sheet pile 20 of the sheet pile arrangement 1, and preferably the second outer sheet pile 30 of the sheet pile arrangement 1, and preferably the central sheet pile 10 of the sheet pile arrangement 1, was driven into a ground for a prolonged period of time, preferably at least one month, particularly preferably at least one year, before assembly of the sheet pile arrangement 1 and was then removed from the ground, wherein the first connecting element 50 and the second connecting element 60 of the sheet pile arrangement 1 were not driven into a ground for a prolonged period of time, in particular not at all, before assembly of the sheet pile arrangement 1. The first coupling means 20a of the first outer sheet pile 20 is cleaned and / or machined, in particular by milling, before assembly.The second coupling means 30e of the second outer sheet pile 30 is also cleaned and / or machined, in particular by milling, before assembly. List of reference symbols 1 sheet pile arrangement 2 sheet pile wall 10, 10' central sheet pile 10a, 10a' first coupling element of the central sheet pile 10b, 10b' first section of the central sheet pile 10c, 10c' middle section of the central sheet pile 10d, 10d' second section of the central sheet pile 10e, 10e' second coupling element of the central sheet pile 20 first outer sheet pile 20a first coupling means of the first outer sheet pile 20b first section of the first outer sheet pile 20c middle section of the first outer sheet pile 20d second section of the first outer sheet pile 20e second coupling element of the first outer sheet pile 21 Opening of the first outer sheet pile 30 second outer sheet pile 30a first coupling means of the second outer sheet pile 30b first section of the second outer sheet pile 30c middle section of the second outer sheet pile 30d second section of the second outer sheet pile 30e second coupling means of the second outer sheet pile 31 Opening of the second outer sheet pile 40 third connecting element 41 first coupling means of the third connecting element 42 second coupling means of the third connecting element 50 first connecting element 51 first connecting section of the first connecting element 52 second connecting section of the first connecting element 52a Opening of the second connecting portion of the first connecting element 60 second connecting element 61 first connecting section of the second connecting element 62 second connecting section of the second connecting element 62a Opening of the second connecting portion of the second connecting element 100 procedures 110-150 process steps E Driving direction E1 mirror plane L1 Longitudinal extension of the central sheet pile L2 Longitudinal extension of the first outer sheet pile L3 Longitudinal extension of the second outer sheet pile L4 Longitudinal extension of the third connecting element L5 Longitudinal extension of the first connecting element L6 Longitudinal extension of the second connecting element R Sheet pile extension direction S center line QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] DE 20 2016 101 909 U1

[0002]

Claims

[1] Sheet pile arrangement (1) for a sheet pile wall (2), the sheet pile arrangement (1) comprising: - a first outer sheet pile (20), which is preferably designed as a U-sheet pile, wherein the first outer sheet pile (20) has a longitudinal extension (L2) running parallel to a driving direction (E), wherein a first coupling means (20a) extending parallel to the longitudinal extension (L2) of the first outer sheet pile (20) is arranged on a first section (20b) of the first outer sheet pile (20), which first coupling means is designed to produce a Larssen lock connection, and wherein a second coupling means (20e) extending along the longitudinal extension (L2) of the first outer sheet pile (20) is arranged on a second section (20d) of the first outer sheet pile (20), which second coupling means is designed to produce a Larssen lock connection, - a second outer sheet pile (30), which is preferably designed as a U-sheet pile, wherein the second outer sheet pile (30) has a longitudinal extension (L3) running parallel to the driving direction (E), - a central sheet pile (10, 10'), which is preferably designed as a Z-sheet pile, wherein the central sheet pile (10, 10') has a longitudinal extension (L1) running parallel to the driving direction (E), wherein the central sheet pile (10, 10') is arranged between the first outer sheet pile (20) and the second outer sheet pile (30) and is connected to the first outer sheet pile (20) and to the second outer sheet pile (30), characterized byin that a first connecting element (50) is connected to the first coupling means (20a) of the first outer sheet pile (20), wherein the first connecting element (50) has a first connecting portion (51) which is designed to produce a positive connection with the first coupling means (20a) of the first outer sheet pile (20), wherein the first connecting portion (51) of the first connecting element (50) is positively connected to the first coupling means (20a) of the first outer sheet pile (20), and wherein the first connecting element (50) has a second connecting portion (52) which is designed to produce a head-claw type connection. [2] Sheet pile arrangement according to the preceding claim, wherein a first coupling means (30a) extending parallel to the longitudinal extent (L3) of the second outer sheet pile (30) is arranged on a first section (30b) of the second outer sheet pile (30), which first coupling means is designed to produce a Larssen lock connection, and wherein a second coupling means (30e) extending along the longitudinal extent (L3) of the second outer sheet pile (30) is arranged on a second section (30d) of the second outer sheet pile (30), which second coupling means is designed to produce a Larssen lock connection. [3] Sheet pile arrangement according to the preceding claim, wherein a second connecting element (60) is connected to the second coupling means (30e) of the second outer sheet pile (30), wherein the second connecting element (60) has a first connecting portion (61) which is designed to establish a positive connection with the second coupling means (30e) of the second outer sheet pile (30), wherein the first connecting portion (51) of the second connecting element (60) is positively connected to the second coupling means (30e) of the second outer sheet pile (30), and wherein the second connecting element (60) has a second connecting portion (62) which is designed to establish a head-claw type connection, wherein preferably the second connecting portion (62) of the second connecting element (60) is head-shaped or claw-shaped for producing a head-claw type connection. [4] Sheet pile arrangement according to the preceding claim, wherein the second connecting portion (52) of the first connecting element (50) is head-shaped and the second connecting portion (62) of the second connecting element (60) is claw-shaped, or wherein the second connecting portion (52) of the first connecting element (50) is claw-shaped and the second connecting portion (62) of the second connecting element (60) is head-shaped. [5] Sheet pile arrangement according to one of the preceding claims, wherein the longitudinal extension (L1) of the central sheet pile (10, 10') extends from the upper end of the central sheet pile (10, 10') to the lower end of the central sheet pile (10, 10'), and / or wherein the longitudinal extension (L2) of the first outer sheet pile (20) extends from the upper end of the first outer sheet pile (20) to the lower end of the first outer sheet pile (20), and / or wherein the longitudinal extent (L3) of the second outer sheet pile (30) extends from the upper end of the second outer sheet pile (30) to the lower end of the second outer sheet pile (30). [6] Sheet pile arrangement according to one of the preceding claims, wherein the central sheet pile (10, 10') has a first section (10b, 10b') on which a first coupling means (10a, 10a') extending along the longitudinal extent (L1) of the central sheet pile (10, 10') is arranged, and wherein the central sheet pile (10, 10') has a second section (10d, 10d') on which a second coupling means (10e, 10e') extending along the longitudinal extent (L1) of the central sheet pile (10, 10') is arranged. [7] Sheet pile arrangement according to one of the preceding claims, wherein the first outer sheet pile (20) on the side of the first coupling means (10a, 10a') of the central sheet pile (10, 10') is connected to the central sheet pile (10, 10') directly or by means of a third connecting element (40), and / or wherein the second outer sheet pile (30) on the side of the second coupling means (10e, 10e') of the central sheet pile (10, 10') is connected to the central sheet pile (10, 10') directly or by means of a fourth connecting element. [8] Sheet pile arrangement according to one of the preceding claims, wherein the first coupling means (10a, 10a') of the central sheet pile (10, 10') is designed to produce a Larssen lock connection, and / or wherein the second coupling means (10e, 10e') of the central sheet pile (10, 10') is designed to produce a Larssen lock connection. [9] Sheet pile arrangement according to one of the preceding claims, wherein the first outer sheet pile (20) is designed as a U-sheet pile and the second outer sheet pile (30) is designed as a U-sheet pile, and wherein the first outer sheet pile (20) and the second outer sheet pile (30) are arranged such that the open side (21) of the first outer sheet pile (20) and the open side (31) of the second outer sheet pile (30) point in different directions. [10] Sheet pile arrangement according to one of the preceding claims, wherein the first outer sheet pile (20) is a hot-rolled U-sheet pile, and / or wherein the second outer sheet pile (30) is a hot-rolled U-sheet pile, and / or wherein the central sheet pile (10, 10') is a hot-rolled or cold-rolled Z-sheet pile. [11] Sheet pile arrangement according to one of the preceding claims, wherein the longitudinal extension (L1) of the central sheet pile (10, 10') deviates from the longitudinal extension (L2) of the first outer sheet pile (20) and from the longitudinal extension (L3) of the second outer sheet pile (30), wherein preferably the longitudinal extent (L2) of the first outer sheet pile (20) and the longitudinal extent (L3) of the second outer sheet pile (30) are substantially of the same length. [12] Sheet pile arrangement according to one of the preceding claims, wherein the longitudinal extent (L1) of the central sheet pile (10, 10') deviates by at least 5%, preferably at least 10%, particularly preferably at least 15%, in particular 20%, from the longitudinal extent (L2) of the first outer sheet pile (20), and is preferably shorter than the longitudinal extent (L2) of the first outer sheet pile (20) and / or wherein the longitudinal extent (L1) of the central sheet pile (10) deviates by at least 5%, preferably at least 10%, particularly preferably at least 15%, in particular 20%, from the longitudinal extent (L3) of the second outer sheet pile (30), and is preferably shorter than the longitudinal extent (L3) of the second outer sheet pile (30). [13] Sheet pile wall (2) comprising a plurality of sheet pile assemblies (1) according to one of the preceding claims, wherein the sheet pile assemblies (1) each comprise exactly three sheet piles (10, 20, 30), namely the central sheet pile (10) and the first outer sheet pile (20) and the second outer sheet pile, wherein the sheet pile assemblies (1) are arranged next to one another and connected to one another in such a way that in each case the first connecting element (50) of one sheet pile assembly of the sheet pile assemblies (1) is connected to the second connecting element (60) of a further sheet pile assembly of the sheet pile assemblies (1). [14] Use of a sheet pile arrangement (1) according to one of claims 1-12 and / or a sheet pile wall according to claim 13, wherein the first outer sheet pile (20) of the sheet pile arrangement (1), and preferably the second outer sheet pile (30) of the sheet pile arrangement (1), and preferably the central sheet pile (10) of the sheet pile arrangement (1), was driven into a ground for a longer period of time, preferably at least one month, particularly preferably at least one year, before assembly of the sheet pile arrangement (1) and was then removed from the ground, wherein the first connecting element (50) and the second connecting element (60) of the sheet pile arrangement (1) were not driven into a ground for a longer period of time, in particular not at all, before assembly of the sheet pile arrangement (1).

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