Abstract:
An arrangement of sheet-pile wall components includes two sheet-pile wall sections. The ends of the two sheet-pile wall sections are arranged. Their locks are hooked into two lock profiles of a connecting profile which is hooked via a third lock profile into the lock of an anchorage. The respective other ends of the sheet-pile wall sections are secured such that each of the two sheet-pile wall sections partially encloses a region. At least one of the lock profiles and the lock of the sheet-pile wall component of the anchorage in engagement therewith are configured in such a way that the lock profile of the connecting profile and the lock in engagement therewith are hooked one inside the other and grip around one another. As viewed in cross section, they bear on one another and are supported against one another by at least three points in at least one installed position.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
       [0001]    The present application is a continuation application of International Application No. PCT/EP2006/007207 filed Jul. 21, 2006 which claims priority to German Application Nos. 102005037564.2 filed Aug. 9, 2005 and 102006000623.2 filed Jan. 2, 2006. Each of the above-identified applications is expressly incorporated herein by reference in their entireties. 
     
    
     FIELD 
       [0002]    The invention relates to an arrangement of sheet-pile wall components such as sheet piles and carrier elements. 
       BACKGROUND 
       [0003]    An arrangement consisting of sheet-wall components of the type cited above is disclosed in U.S. Pat. No. 6,715,964. There, several adjacent sheet-pile sections which extend in an arc are joined by means of connecting profiles with sheet-pile sections held in the soil which serve as anchorages. The regions, which are called open cells, partly surrounded by the sheet-pile sections extending in an arc are filled with soil at least up to the level of the sheet-pile sections, whereas the outer regions which are isolated from the surrounded regions by the sheet-wall sections are filled with soil to a lower height. In this manner the sides of the sheet-wall sections that point in the outward direction partly protrude from the soil. This so-called open cell structure is used in harbor construction, for example, where the sides of the sheet-wall sections which face out form the harbor wall facing the water. 
         [0004]    In the arrangement known from U.S. Pat. No. 6,715,964, sheet piles provided with simple locks in the form of header bars with an oval cross-section and C-shaped claw bars are used as the straight sheet-pile wall sections which extend in an arc. A star shaped profile at the end of which header bars with an oval cross-section are formed as locks serves as the connecting profile with which the sheet-pile wall sections are secured to the anchorage. 
         [0005]    A disadvantage of the sheet-pile wall components used there is that the connecting profile joining the sheet-pile wall sections to the anchorages is under extremely high tensile forces particularly due to the soil pressure of the ground held back from the surrounding area. 
         [0006]    In view of the above, an object of the present invention is to develop an arrangement in which the connecting profile joining the sheet-pile wall sections and the anchorage can also withstand extremely high tensile forces without the mutually engaged locks failing. 
       SUMMARY 
       [0007]    The above-object is achieved according to the present invention by an arrangement of sheet-pile wall components such as sheet piles and carrier elements. The arrangement comprises two sheet-pile wall sections which include sheet-pile wall components extending in an arc or polygonal shape, and which are joined by means of locks. The sheet-pile wall components of the two sheet-pile wall sections provide on the ends of the two sheet-pile wall sections, which are arranged immediately adjacent one another, locks hooked into two lock profiles of a connecting profile. The provided connection is hooked via a third lock profile into the lock of an anchorage, and the sheet-pile wall components are provided on the respective other ends of the sheet-pile wall sections being secured in their positions such that each of the two sheet-pile wall sections partially encloses a region which serves as an open cell structure. The design at least one of the lock profiles of the connecting profile along with the lock of the sheet-pile wall components, or the anchoring being engaged with said profile in such a way that the lock profile of the connecting profile and the lock engaged therewith hook into one another and surround each other such that they are adjacent and mutually abutting, at least at three points, in at least one installation position when seen in cross-section. 
         [0008]    According to the invention, it is disclosed that at least one of the lock profiles of the connecting profile and the lock of the sheet-pile wall components or the anchorage in engagement therewith be designed so that, when seen in cross-section, they form at least one so-called three point connection. The lock profile of the connecting profile and the lock of the sheet-pile wall components or anchorage engaged therewith are designed such that they surround each other and hook into each other in a mutual fashion in such a way that the locks adjoin and abut each another at least at three points when seen in cross-section. When tensile force impinges upon the sheet-pile wall components or the anchorage in the direction of contact, the two locks support each other at these three points in such a way that the tensile force is distributed over all three points of impact. This way the combination of a connecting profile and sheet-pile wall components or an anchorage in engagement therewith is able to withstand relatively high tensile forces which prevent the lock connections from becoming loose. 
         [0009]    Further advantageous developments of the invention derive from the following description and the drawings. 
         [0010]    It is particularly beneficial when the three-point connection described is formed between each lock profile of the connecting profile and the lock of the sheet-pile wall components in engagement therewith, respectively. In this manner the combination of connecting profile, sheet-pile wall components and anchorage is able to resist the influence of extremely high tensile forces without one of the lock profiles or one of the locks unintentionally opening. 
         [0011]    Furthermore, in a particularly preferred embodiment of the arrangement according to the invention, a connecting profile is used wherein the two lock profiles at which the two sheet-pile wall components of the sheet-pile wall sections are hooked on have mirror-symmetrical contours relative to the superficial center of gravity of the connecting profile. This causes the tensile forces impinging upon the lock profiles of the connecting profile, as a result of the sheet-pile wall components, to come to bear on the connecting profile from mirror-symmetrical directions so that normally, when at least approximately equal tensile forces impinge upon the sheet-pile wall sections, the forces cancel each other out in part, and this prevents the connecting profile from being warped or twisted by forces of varying magnitude. 
         [0012]    It is further proposed that the arrangement according to the invention be lengthened or expanded by hooking at least one of the two sheet-pile wall sections onto an additional connecting profile by means of the lock on the other end of the sheet-pile wall components of the section, and connecting the additional connecting profile to an additional sheet-pile wall section and an additional anchorage. By means of this modular construction, it is possible to build structures with correspondingly large dimensions because it is possible to anchor the free ends of the sheet-pile wall sections directly to carrier elements such as double-T carriers, T carriers, or pipe piles, for example. 
         [0013]    It is further disclosed that a given number of sheet-pile wall sections be provided, extending in the shape of an arc or polygon, and each consisting of sheet-pile wall components that are each part of the sheet-pile wall sections being joined to an immediately adjacent sheet-pile wall section by means of a connecting profile, and each connecting profile in turn is engaged with an anchorage embedded in the soil. 
         [0014]    In both applications described above, the connecting profiles that are used are advantageously identically constructed. In a first instance, this makes it easier to set up the arrangement. In addition, when all the connecting profiles have the same dimensions, the arrangement does not contain a weak point at the joint. 
         [0015]    It is beneficial when the anchorage comprises a carrier element which is secured in the soil, preferably a double-T carrier, a T carrier, or a pipe pile which has been driven into solid ground by ramming or vibration. The connecting profile can then be secured directly to the carrier element which is provided with a corresponding lock bar, for instance a weld-on profile, for this purpose. Alternatively, the connecting profile is coupled or joined to the carrier element indirectly. An additional sheet-pile wall section formed from sheet-pile wall components is suitable for this, which serves as a supporting wall or retaining wall. In order to further increase the anchoring effect, Z-piles or U-piles can be used as sheet-pile wall components for the other sheet-pile wall section. The Z or U shape of the sheet piles causes the tensile forces and shearing forces impinging between the connecting profile and the anchorage to be partly reduced by the additional friction and retention forces impinging between the Z or U shaped sheet piles and the ground, thereby relieving the anchorage. This way, the overall arrangement has a higher resistance to forces impinging from the outside. 
         [0016]    When the arrangement according to the invention is constructed as a quay wall, for example, it is proposed that the area that is partly surrounded by the sheet-pile wall sections extending in the shape of an arc or polygon be filled with soil, while the side of the sheet-pile wall sections averted from the surrounded area protrude from the soil so that the sheet-pile wall sections hold back the soil contained in the surrounded areas. 
         [0017]    In a particularly preferred embodiment of the connecting profile for the arrangement according to the invention, the directions of contact, with which the directions of main force impact on the sheet-pile wall components which are joined with the connecting profiles and on the anchorage are aligned, lie at a 120 degree angle to one another. The working point of every lock profile, which bears the impact of the resulting tensile force with the sheet-pile wall components hooked on so as to extend in the direction of contact or with the anchorage hooked on, is the same radial distance from the superficial center of gravity of the connecting profile as the working points of the other two lock profiles. One effect of such a configuration of the connecting profile wherein the working points are the same radial distance from the connecting profile&#39;s superficial center of gravity is that the tensile forces impinging upon the connecting profile as a result of the sheet-pile wall sections, and the anchorage that is hooked on, are evenly distributed across the connecting profile so that they at least partly cancel one another out. Secondly, the installation position of the connecting profile is immaterial. The connecting profile can be rammed into the ground with one face side as well as the other. Furthermore, it is also immaterial which lock profile of the connecting profile the respective sheet-pile wall components or anchorage engages with. In the past it has been demonstrated that the use of asymmetrical connecting profiles to join three sheet-pile wall sections always causes problems. Frequently the connecting profiles are rammed into the ground on construction sites without checking if they are in the proper position. But when asymmetrical connecting profiles are in the wrong position, the course of the sheet-pile wall sections relative to each other does not correspond to the optimal flow of forces, so in the worst case there is a danger that the forces impinging upon the sheet-pile wall sections will be insufficiently diverted to the anchorage. 
         [0018]    In order to achieve the greatest possible flexibility in the construction of the arrangement according to the invention, it is proposed that a connecting profile be used wherein the lock profiles are designed so that the lock of the sheet-pile wall components and the anchorage in which the lock profile of the connecting profile is hooked are slewable at least 15 degrees in the lock profile. 
         [0019]    The effect of such a connecting profile construction is that the sheet-pile wall components and the anchorage move relatively freely when in the inner lock chambers of the lock profiles of the connecting profile, which all but completely rules out the possibility of the locks tilting in the lock profiles of the connecting profile when the piles are driven into the ground. In addition, imprecision in the course of the sheet-pile wall sections and the anchorage which are joined to the connecting profile can be compensated for. 
         [0020]    It is particularly beneficial to use a connecting profile for the arrangement according to the invention wherein each lock profile comprises a thumb bar with a middle ridge, at which a thumb is formed which extends transverse to its longitudinal direction and protrudes beyond the middle ridge, along with a curved finger bar, the free end of which points in the direction of the thumb bar, forming an inner lock chamber with an at least approximately elliptical or oval cross section and, together with the end of the thumb pointing in the direction of the finger bar, defining a mouth for the lock of the sheet-pile wall section being hooked on and to the lock of the anchorage. The lock of the sheet-pile wall section is hooked on and the lock of the anchorage consists of a curved finger bar and a thumb bar which have corresponding dimensions. 
         [0021]    When the lock profiles of the connecting profiles and the locks of the sheet-pile wall components and the anchorage are designed in a complementary fashion accordingly, the cross-section of the engaged lock profiles and locks corresponds to the described three-point connection. Now the thumb of the lock of the sheet-pile wall components or the anchorage is received in the locking chamber of the lock profile of the connecting profile, whereas the thumb of the connecting profile is received in the locking chamber of the lock of the sheet-pile wall components or the lock of the anchorage. When tensile force impinges upon the sheet-pile wall, components or the anchorage in the direction of contact, the two thumbs brace against each other and the finger bars of the other lock, respectively, such that the two locks, when viewed in cross-section, abut at three points respectively, which is to say they mutually support each other. 
         [0022]    This three-point connection is capable of resisting extremely high tensile forces which may amount to several tens of thousands of kilonewtons due to the fact that the interaction of the thumb bars and finger bars of the locks engaging one another makes it all but impossible for the finger bars to bend or the thumb bars to break off under normal tensile forces. At the same time, the lock configuration guarantees that the engaged locks can pivot relative to one another at least to a limited degree without becoming loose. That simplifies the construction of the arrangement in a first instance. It is also makes it easer to configure the sheet-pile wall components in a circle relative to one another in the area of the connecting profile as required in order to construct the open cell structure. 
         [0023]    It is further proposed in a particularly preferred embodiment of the connecting profile described above which is used for the arrangement according to the invention that at least one of the lock profiles be designed in such a way that it extends at an angle relative to its given direction of contact, when viewed in cross-section, such that the direction of main force impact on the lock of the sheet-pile wall components which is hooked into the lock profile pivots at least 8 to 12 degrees in either direction about the given direction of contact. 
         [0024]    It has been shown that with a lock profile formed from a thumb bar and finger bar, if it is aligned precisely at the base relative to the given direction of contact, the pivoting of the sheet-pile wall components out of the given direction of contact is limited in the direction of the thumb bar, while the sheet-pile wall components&#39; pivoting motion out of the given direction of contact in the opposite direction is possible many times over. Designing the lock profile at the base so that it is at an angle to the given direction of contact gives the sheet-pile wall components the ability to be pivoted in both possible directions by at least approximately the same maximum angles relative to the given direction of contact with their lock in the lock profile of the connecting profile according to the invention. 
         [0025]    It is also beneficial when the lock profile in the connecting profile used for the arrangement extends with the main axis of its inner lock chamber, which has an elliptical or oval cross-section, at an angle of 5 to 10 degrees relative to its given direction of contact, with its thumb bar angled away from the given direction of contact. As long as the lock profile extends at such an angle relative to the base, the sheet-pile wall components can pivot in other directions relative to the given direction of contact by approximately the same angle. It is particularly beneficial when the lock profile comprises an angle of 7 to 8 degrees. 
         [0026]    It is further provided that, in order for all the sheet-pile wall components to be able to pivot relative to the given directions of contact in opposite directions by at least approximately the same angle, all lock profiles should extend at an angle of 5 to 10 degrees relative to the directions of contact, with the two lock profiles whose thumb bars are formed at the base immediately adjacent one another being angled toward one another. 
         [0027]    But if installation position is not a problem, it is also possible to use a connecting profile wherein the lock profiles whose thumb bars are formed at the base immediately adjacent one another are farther from the superficial center of gravity of the connecting profile than the other of the three lock profiles. This allows the arrangement&#39;s sheet-pile wall components which are hooked into the lock profiles with immediately adjacent thumb bars to have enough room to pivot so that they do not collide with the connecting profile&#39;s base. 
         [0028]    In a particularly preferred development of the connecting profile, the ratio between the opening width of the mouth of each lock profile and the maximum opening width of the inner lock chamber of the respective lock profile is between 1 to 2 and 1 to 2.5 so that the locks of the sheet-pile wall components have enough room to pivot inside the connecting profile&#39;s lock profiles. Here, it is also beneficial when the ratio of the length of the thumb bar, as viewed transverse to the longitudinal direction of the middle ridge, and the maximum opening width of the inner lock chamber is between 1 to 1.2 and 1 to 1.4 in every lock profile of the connecting profile. When the thumb is appropriately constructed, the lock of the sheet-pile wall components and the lock of the anchorage are guaranteed to be able to pivot in the inner locking chamber, and at the same time the lock is guaranteed to sufficiently hook into the lock profile which prevents the locks engaged with one another from inadvertently becoming loose. 
         [0029]    In order to improve the ability of the sheet-pile wall components to pivot, in a development of the connecting profile, it is further provided that the middle ridge of the thumb bar be constructed so that the ratio between the thickness of the middle ridge, observed transverse to its longitudinal direction, and the opening width of the mouth is between 1 to 1.2 and 1 to 1.4. 
         [0030]    The three design features described above, namely the ratio between the opening width of the mouth and the opening width of the locking chamber, the ratio between the length of the thumb and the opening width of the inner lock chamber, and the ratio between the thickness of the middle ridge and the opening width of the mouth, can each be realized jointly, separately, or partially in at least one of the lock profiles. 
         [0031]    In order to ensure that the forces impinging upon the lock profiles, which are frequently on the order of several thousand kilonewtons, do not damage the lock profile, it is further proposed that in each lock profile of the connecting profile used, the ratio between the thickness of the middle ridge, observed transverse to the longitudinal direction thereof, and the length of the thumb, observed transverse to the middle ridge&#39;s longitudinal direction, is between at least 1 to 2.3 and 1 to 2.5. The length of the thumb is a particularly important determinant of the ability of the lock of the sheet-pile wall components to pivot because the lock is pivoted about the thumb of the thumb bar, and the lock is supposed to engage with the thumb of the thumb bar in particular, partly surrounding it, thereby guaranteeing a secure hold in the inner lock chamber. The result of this is that the thickness of the middle ridge at which the thumb is formed is only allowed to be dimensioned such that the lock is able to be pivoted without impediment in the inner lock chamber, on one hand, and so that, on the other hand, the thumb bar is prevented from becoming deformed or breaking off. 
         [0032]    In order to give the connecting profile that is used sufficient stability, it is further provided that the wall thickness of the curved finger bar of each lock profile in the area of the maximum opening width of the inner lock chamber be larger by a factor of 1.1 to 1.3 than the thickness of the middle ridge, observed transverse to its longitudinal direction, in the area of the maximum opening width of the inner lock chamber. 
         [0033]    In a particularly preferred embodiment of the connecting profile, the three directions of contact of the three lock profiles run at a 120° offset relative to one another so that sheet-pile wall sections can be connected which approach the connecting profile at a mutual offset of 120 degrees. The present invention also contemplates designing the connecting profile in such a way that, for example, two of the lock profiles stick out of the base in opposite directions of contact, in other words at a 180 degree offset, while the third lock profile runs at a 90 degree angle relative to the other two. 
         [0034]    The base body of the utilized connecting profile can be designed in the shape of a cylinder from which the lock profiles stick out radially in the different directions of contact. But in the alternative it is also possible to design the base in the shape of a star; i.e., with ridges sticking out in the three directions of contact in the shape of a star, at the ends of which the lock profiles are formed. A connecting profile with this configuration is particularly well suited to bridging large distances between individual sheet-pile wall components that have to be joined. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS  
         [0035]    The invention will now be described in detail with the aid of an exemplifying embodiment and modifications thereof, and with reference to the accompanying drawing in which: 
           [0036]      FIG. 1  is a plan view of an arrangement according to the invention with multiple open cells whose ends are secured in the ground by pipe piles; 
           [0037]      FIG. 2  is a sectional view along the line A-A in  FIG. 1  showing the construction of one of the open cells in a side view; 
           [0038]      FIG. 3  is a first enlarged section of the arrangement according to  FIG. 1  showing three sheet-pile wall sections and two anchorages, with two sheet-pile wall sections joined to one anchorage in each case by means of a connecting profile; 
           [0039]      FIG. 5  is a section corresponding to the section shown in  FIG. 3  but with a modified anchorage of the open cell structure; 
           [0040]      FIG. 6  is a plan view of the face side of an exemplifying embodiment of a connecting profile used in the arrangement according to  FIG. 1  with three lock profiles which are offset 180 degrees to one another; 
           [0041]      FIG. 7  is a plan view of the connecting profile according to  FIG. 6  in which a total of three flat profiles are hooked in as sheet-pile wall components; 
           [0042]      FIG. 8  is a plan view of the face side of a first modification of the exemplifying embodiment shown in  FIGS. 6 and 7  wherein the working points of the lock profiles are the same radial distance from the superficial center of gravity; 
           [0043]      FIG. 9  is a plan view of a second modification of the exemplifying embodiment represented in  FIGS. 6 and 7  wherein the lock profiles are not angled relative to the directions of contact; 
           [0044]      FIG. 10  is a plan view of a third modification of the exemplifying embodiment represented in  FIGS. 6 and 7  wherein the base is curved and the two lock profiles whose thumb bars face each other are formed at the ends of the curved base; 
           [0045]      FIG. 11  is a plan view of a fourth modification of the exemplifying embodiment represented in  FIGS. 6 and 7  wherein a ridge bar is fashioned on the base at the ends of which one of the lock profiles is formed; 
           [0046]      FIG. 12  is a plan view of a fifth modification of the exemplifying embodiment represented in  FIGS. 6 and 7  wherein the base comprises three rounded star-shaped ridge bars at the ends of which the lock profiles are formed; 
           [0047]      FIG. 13  is a plan view of a sixth modification of the exemplifying embodiment represented in  FIGS. 6 and 7  wherein the base comprises three straight star-shaped ridge bars at the ends of which the lock profiles are formed; 
           [0048]      FIG. 14  is a plan view of a seventh modification of the exemplifying embodiment represented in  FIGS. 6 and 7  wherein the base comprises three reinforced star-shaped ridge bars at the ends of which the lock profiles are formed; and 
           [0049]      FIG. 15  is a plan view of an eighth modification of the exemplifying embodiment represented in  FIGS. 6 and 7  wherein the base comprises three rounded and reinforced star-shaped ridge bars at the ends of which the lock profiles are formed. 
       
    
    
     DETAILED DESCRIPTION  
       [0050]      FIG. 1  is a plan view of a section of an arrangement  10  configured according to the invention. The arrangement  10  is formed from multiple arc-shaped sheet-pile wall sections  12  which are joined by means of connecting profiles  16  to first anchorages  14  which are secured in the ground. Each arc-shaped sheet-pile wall section  12  forms a so-called open cell  18  with two first anchorages  14 . The end of the sheet-pile section  12  represented in  FIG. 1  is connected to a pipe pile  20  that has been driven into the ground, which serves as a closing element for the arrangement  10 , as will be explained further below. 
         [0051]      FIG. 2  is a view representing a section taken along line A-A in  FIG. 1 . As the view shows, the open cell  18  which is partly surrounded by the arc-shaped sheet-pile wall section  12  is filled with soil, whereas the area outside the open cell  18  (left-hand side of  FIG. 2 ) is a shoreline area which is secured by means of the arrangement  10  in this example. The sheet-pile wall sections  12  have only been partly driven into the ground, so the water pressure of the impinging water (W) on one side and the ground pressure inside the open cell  18  on the other support the sheet-pile wall sections  12  laterally, while in the downward direction the sheet-pile wall section  12  is only partially driven into the ground. In order to prevent the sheet-pile wall sections  12  from coming out of the ground, they are secured in solid ground by the anchorage  14  and  20 . 
         [0052]      FIG. 3  is an enlarged plan view representing a section of the arrangement  10  for purposes of laying out the construction of the arrangement  10  in greater detail. The sheet-pile wall section  12  represented in  FIG. 12  consists of a total of nine sheet piles  22 , in this case union flat profiles, which are driven into the ground in an arc configuration and hooked into each other. The last two sheet piles  22  of the sheet-pile wall section  14 , disposed at either end, are hooked into the lock profiles of two connecting profiles  16  whose construction will be described in detail further below. As  FIG. 1  shows, additional arc-shaped sheet-pile wall sections  12  are hooked into the other lock profiles of the two connecting profiles  16  accordingly. 
         [0053]    The third lock profile of each connecting profile  16  is engaged with a supporting wall  24  which is formed from sheet piles  22 , in this case as well union flat piles. The supporting wall  24  is joined, by means of a weld-on profile  26 , with a double-T carrier  28  which has been rammed into the ground. The supporting wall  26  and the double-T carrier  28  joined therewith form the first anchorage  14 . 
         [0054]    As made abundantly clear by the arrangement represented in  FIG. 1 , deviations in the course of sheet-pile wall sections  12  can be compensated by means of the connecting profile  16 , which is especially important where multiple sheet-pile wall sections have to be joined at a common point. 
         [0055]      FIG. 4  represents another section of the arrangement  10  in an enlarged plan view. This section represents the securing of the end of the sheet-pile wall section  12 , for instance in solid ground on the shoreline. Stabilization is facilitated by means of the second anchoring  20 , which in this example consists of a pipe pile  30  that has been driven into the ground. The last sheet piles  22  of the sheet-pile wall section  12  are stabilized by means of a weld-on profile  26  which is welded onto the shell of the pipe pile  30 . 
         [0056]    Lastly,  FIG. 5  represents one possible modification of the first anchorage  14  represented in  FIG. 3 . In order to relieve the double-T carrier  28  of extremely high tensile and shearing forces, which could be transferred from the sheet-pile wall sections  12  to the double-T carrier  28  by means of the supporting wall  24 , and in order to increase the resistance of the overall anchorage  14  to any tensile forces and shearing forces that might occur, the supporting wall  24  is made of a total of four sheet piles  22  instead of two. Furthermore, the four sheet piles  22  have been driven into the ground at an angle of 10 degrees out of alignment in an alternating fashion, from a cross-sectional perspective, in order to be able to counteract the tensile and shearing forces impinging in alignment upon the supporting wall  24  by means of greater frictional and holding forces. It would also be possible to use U shaped or Z shaped sheet piles driven into the ground for the supporting wall  24  instead of the angled configuration of the sheet piles  22 . 
         [0057]      FIGS. 6 and 7  represent a plan view of an exemplifying embodiment of a connecting profile  16  which is used in the arrangement  10 , which has a constant cross-section over its entire length. The connecting profile  16  serves for joining two sheet-pile wall sections  12  with the supporting wall  24 . The connecting profile  16  represented in  FIGS. 6 and 7  has three prescribed directions of contact X, Y and Z, which are at a 120 degrees offset relative to one another. Direction of contact X, Y or Z in this sense means the direction in which the sheet piles  22  form a so-called three-point connection with the connecting profile  16  in cross-section when the piles are hooked on. 
         [0058]    The connecting profile  16  has a base  32  from which three lock profiles  34 ,  36  and  38  project in directions of contact X, Y and Z. Since lock profiles  34 ,  36  and  38  are identical, the construction of lock profiles  34 ,  36  and  38  will be described below with reference to  FIG. 6  with the aid of lock profile  34  as represented in  FIG. 6  above. 
         [0059]    The lock profile  34  has a thumb bar  40  which projects from the base  32  and, disposed at a remove therefrom, a finger bar  42 , the two of which protrude from base  32  together and partly surround an inner lock chamber  44 . 
         [0060]    The thumb bar  40  is formed by a middle ridge  46  which emerges from the base  32 , at the free end of which a thumb  48  is formed, extending transverse to the longitudinal direction of the ridge, which extends beyond the ridge  46  in both directions. 
         [0061]    The finger bar  42  also emerges from the base  32  and extends toward the thumb bar  40  in a curved manner. The finger bar  42  ends together with the exterior surface of the thumb  48  in a tangential plane (not represented) and defines a mouth  50  together with the end of the thumb  48  that points in the direction of the finger bar  42 . 
         [0062]    The transitions between the base  32  and the middle ridge  46 , between the middle ridge  42  and the thumb  48 , and between the base  32  and the finger bar  42  are rounded and their shape conforms to that of an ellipse so that the inner lock chamber  44  has an inner cross-section that is at least approximately elliptical. 
         [0063]    In the connecting profile  16  the sheet piles  22  that will be hooked on can be pivoted in a defined fashion with their locks  52  in the inner lock chambers  44  of the lock profiles  34 ,  36 , and  38  during which time a secure hold of the lock  52  of the sheet pile  22  in the chamber  44  of the connecting profile  16  is still guaranteed in every pivot position of the sheet pile  22 . 
         [0064]    In order to simplify pivoting, the following design features are additionally provided for the connecting profile  16  according to the invention. First the ratio between the opening width (a) of the mouth  50  and the maximum opening width (b) of the inner lock chamber  24  is approximately 1 to 2.1. The ratio between the thickness (c) of the middle ridge  46 , as viewed transverse to its longitudinal direction, and the opening width (a) of the mouth  50  is 1 to 1.3 in turn. The ratio between the thickness (c) of the middle ridge  46 , as viewed transverse to the longitudinal direction thereof, and the length (d) of the thumb  48 , as viewed transverse to the longitudinal direction of the middle ridge  46 , is 1 to 2.3. Furthermore, the ratio of the length (d) of the thumb  48 , as viewed transverse to the middle ridge  46 , and the maximum opening width (b) of the inner lock chamber  44  is 1 to 1.25. 
         [0065]    This design feature guarantees that the lock  52  of the sheet pile  22  retains its ability to pivot some 16 degrees without the lock  52  of the sheet pile  22  jumping out of the locking profile  34 ,  36  or  38  of the connecting profile  16 . 
         [0066]    But in order to guarantee that the locking profile  34 ,  36  and  38  is able to resist the arising holding forces and does not break despite the potential ability of the sheet-pile wall components to pivot, the bars  40  and  42  which form the locking profile  34 ,  36  and  38  are dimensioned accordingly. 
         [0067]    The wall thickness (e) of the curved finger bar  42  of each locking profile  34 ,  36  and  38  in the area of the maximum opening width b of the inner lock chamber  44  is larger by a factor of 1.2 than the thickness (c) of the middle ridge  46  as viewed transverse to its longitudinal direction in the area of the maximum opening width (b) of the inner lock chamber  44 . Since the tensile force portion impinging on the thumb bar  40  along the longitudinal direction of the middle ridge  46  is greater than the transverse force portion, the middle ridge  46  of the thumb bar  40  can be constructed weaker than the finger bar  42 . In contrast, at the finger bar  42  the impinging transverse force is greater, so a relatively large bending momentum impinges upon the finger bar, which the finger bar must absorb. 
         [0068]    In order to ensure that the sheet piles  22  to be hooked on can pivot at least approximately over the same angle range relative to the directions of contact X, Y and Z respectively, the three locking profiles  34 ,  36  and  38  are constructed on the base  32  such that they tilt relative to the directions of contact X, Y and Z, as explained below. 
         [0069]    The locking profile  34  represented at the top of  FIG. 6  is at an angle α, in this case a 7.5 degree angle, relative to direction of contact X, in which case the thumb bar  42  is angled away from direction of contact X. 
         [0070]    The two other locking profiles  36  and  38  are also fashioned on the base  32  at a 7.5 degree angle to directions of contact Y and Z respectively, with the thumb bars  32  being angled away from the directions of contact Y and Z again here. 
         [0071]    Since the two locking profiles  36  and  38  represented at the bottom of  FIG. 6  are disposed closer to each other by virtue of being angled, in turn the distance from the two locking profiles  36  and  38  to the superficial center of gravity (S) of the connecting profile  16  is greater than the distance between the top locking profile  34  and the same point. This ensures that the sheet piles  22  that will be hooked into the two locking profiles  36  and  38  do not touch even when moved as close together as possible. 
         [0072]      FIG. 7  represents the connecting profile  16  according to the invention with the union flat profiles represented in  FIGS. 1 to 5  as sheet piles  22  hooked into locks  52  on its lock profiles  34 ,  36  and  38 . The pivoting range within which the sheet pile  22  can be hooked on the connecting profile  16  is represented in  FIG. 7  for the lock profile  34  represented at the top of the figure. In this example, the sheet pile  22  can be hooked on the connecting profile  16  in a pivoted position, said pivot comprising an angle of some 8.5 degrees between a first end position and a second end position, proceeding from a starting position in which the direction of main force impact F on the sheet pile  22  is parallel to the direction of contact X, so the pivot range is approximately 8.5 degrees as indicated by the two arrows, and the engaged locks  34  and  52  make contact at three points from a cross-sectional perspective. 
         [0073]      FIG. 8  shows a first modification of the connecting profile  16  represented in  FIGS. 6 and 7 . In this modified connecting profile  16   a  the lock profiles  34   a,    36   a  and  38   a  are also fashioned on the base  32   a  at a 120° offset from each other. A unique aspect of this connecting profile  10   a  is that the working point A of each lock profile  34   a,    36   a  and  38   a  upon which the resulting tensile force impinges if the sheet pile  22  has been hooked on so as to extend in direction of contact X, Y or Z is the same radial distance (f) from the superficial center of gravity (S) of the connecting profile  16   a  as the working points A of the two other lock profiles  36   a,    38   a  and  34   a  respectively. This configuration of the connecting profile  16   a  whereby the working points (A) are the same radial distance from the superficial center of gravity (S) of the connecting profile  16   a  causes the tensile forces impinging upon the connecting profile  16   a  as a result of the hooked-on sheet piles  22  to be evenly distributed across the connecting profile  16   a  and to at least partly cancel each other out. Another consequence is that the installation position of the connecting profile  16   a  is variable, so one can integrate the connecting profile  16   a  in any position without having to pay any attention to the course of the lock profiles  34   a,    36   a  and  38   a  when hooking on the sheet piles  22 . 
         [0074]      FIGS. 9 to 15  represent additional modifications of the connecting profile  16  wherein the base  32  consists of ridge bars in, for instance, a star configuration, at the free ends of which the lock profiles  34 ,  36  and  38  are fashioned. However, it should be noted that in all the modifications shown the design features with respect to the opening width of the mouth  50 , the opening width (b) of the inner lock chamber  44 , the thickness (c) of the middle ridge  46 , the length (d) of the thumb  48 , and the wall thickness (e) of the finger bar  42  are realized in an analogous manner. In the modifications represented in the figure, the lock profiles  34 ,  36  and  38  are not at an angle to directions of contact X, Y and Z but configured such that the inner lock chamber  44  at its maximum opening width (b) extends approximately at a right angle to the direction of contact X, Y and Z. 
         [0075]    It bears noting, however, that in these modifications too it is possible for at least one of the lock profiles  34 ,  36  and  38  to extend at an angle relative to the directions of contact X, Y and Z as described above with reference to  FIGS. 6 and 7 . 
         [0076]      FIG. 9  represents a second modification  16   b  of the connecting profile  16  utilized for the arrangement  10  according to the invention, wherein the lock profiles  34   b,    36   b  and  38   b  do not extend at an angle to the directions of contact X, Y and Z. 
         [0077]    In contrast,  FIG. 10  represents a third modification  16   c  of the connecting profile  16  utilized for the arrangement  10  according to the invention, wherein the base  32   c  extends in a curved manner, and the two lock profiles  36   c  and  38   c  are fashioned at the ends of the curved base  32   c.  The third lock profile  34   c,  on the other hand, is fashioned in the center of the curved base  32   c.    
         [0078]      FIG. 11  is a plan view representing a fourth modification  16   d  of the connecting profile  16  utilized for the arrangement  10  according to the invention, wherein a ridge bar  54   d  is fashioned at the base  32   d  at the ends of which one of the lock profiles  34   d  is formed. 
         [0079]      FIG. 12  is a plan view representing a fifth modification  16   e  of the connecting profile  16  utilized for the arrangement  10  according to the invention, wherein the base  32   e  comprises three rounded ridge bars  54   e  extending in a star configuration at the ends of which the lock profiles  34   e,    36   e  and  38   e  are fashioned. The purpose of the rounded course of the ridge bars  54   e  is to better dissipate the stresses impinging upon the lock profiles  34   e,    36   e  and  38   e.    
         [0080]      FIG. 13  is a plan view representing a sixth modification  16   f  of the connecting profile  16  utilized for the arrangement  10  according to the invention, wherein the base  32   f  comprises three straight ridge bars  54   f  extending in a star configuration at the ends of which the lock profiles  34   f,    36   f  and  38   f  are fashioned. 
         [0081]      FIG. 14  is a plan view representing a seventh modification  16   g  of the connecting profile  16  utilized for the arrangement  10  according to the invention, wherein the base  32   g  comprises three reinforced ridge bars  54   g  extending in a star configuration at the ends of which the lock profiles  34   g,    36   g  and  38   g  are fashioned. The reinforcement of the ridge bars  54   g  prevents the lock profiles  34   g,    36   g  and  38   g  from breaking under extreme tensile force. 
         [0082]    Lastly,  FIG. 15  is a plan view representing an eighth modification  16   h  of the connecting profile  16  utilized for the arrangement  10  according to the invention, wherein the base  32   h  comprises three rounded and reinforced ridge bars  54   h  extending in a star configuration at the ends of which the lock profiles  34   h,    36   h  and  38   h  are fashioned. Here too the rounded shape is meant to improve the dissipation of stress. 
         [0083]    The represented exemplifying embodiments are only some of the possible configurations. For instance, the base  32  can also be fashioned such that the lock profiles  34 ,  36  and  38  project in different directions of contact. That makes it possible to arrange the open cells  18  of the arrangement  10  at different angles relative to each other.