Connection element for connecting sheet piles to carrier elements as well as a combination sheet pile wall with such connection elements

1. A connection element with a uniform cross-section for connecting a sheet pile to a carrier element, with a base strip having two sides, which is adapted to be fastened on one side to the carrier element and which is provided with an interlock profile on an opposite side for engaging the sheet pile; wherein the interlock profile exhibits a lock chamber that is defined by the base strip, a straight support strip that protrudes outward from said opposite side of the base strip and a curved hook strip that protrudes outward from said opposite side of the base strip, whereby the hook strip exhibits a straight extending transition section protruding from the base strip and a hook section that follows said transition section and points in the direction of the support strip; wherein said hook section exhibits a first support surface that faces an inner surface of the support strip, whereby the first support surface and at least that section of the inner surface of the support strip that directly faces the first support surface are located in parallel planes (E 1 , E 2 ) and together define the jaw of the lock chamber; wherein the first support surface transitions under an acute angle (α) into a second support surface that forms a part of the lock chamber; wherein the acute angle (α) between a plane (E 3 ), in which the second support surface extends, and the plane (E 2 ), in which the first support surface extends, exhibits, in a cross-sectional view, a value in the 40 to 50° range, and wherein, in a cross-sectional view, the length of the first support surface and the length of the section of the inner surface that directly faces the first support surface both correspond at least approximately to the length of the second support surface.

2. A connection element as defined in claim 1 , wherein the first support surface transitions into a first outer surface of the hook section that points outward, whereby a plane (E 4 ) in which the first outer surface extends runs at an angle (β) of at least 90° in a cross-sectional view, and wherein the first outer surface transitions under formation of a radius into the second outer surface of the transition section that points outward.

3. A connection element as defined in claim 2 , wherein the angle (β) between the first support surface and the first outer surface is in a 100 to 110° range.

4. A connection element as defined in claim 1 , wherein the inner surface of the support strip and the transition section of the hook strip extend, in a cross-sectional view, at least approximately at a right angle to the longitudinal direction of the base strip.

5. A connection element as defined in claim 1 , wherein the thickness of the straight transition section, viewed perpendicular to its longitudinal expanse, corresponds at least to 1.1 to 1.4 times the thickness of the support strip, which is approximately rectangular in a cross-sectional view.

6. A connection element as defined in claim 1 , wherein the interlock profile is dimensioned such that the interlock of the sheet pile is movable between a first installation position in which the interlock rests against the first support surface and the second support surface of the hook strip, and a second installation position, in which the interlock rests against the inner surface of the support strip and the second support surface of the hook strip.

7. A connection element as defined in claim 1 , wherein the width (a) of the jaw and the minimum permissible distance (b) between an imaginary section line of the plane (E 2 ), where the first support surface is located, and the plane (E 3 ), where the second support surface is located, as well as the inner surface of the base strip that defines the lock chamber fulfill the following condition when viewed in a direction parallel to the plane (E 2 ) of the first support surface:

b

≤

a

tan

⁢

⁢

α

where the angle α is the acute angle at which the first and the second support surfaces run slanted towards each other.

8. A connection element as defined in claim 1 , wherein the inner surface of the base strip that defines the lock chamber extends in a planar fashion and wherein the inner surface of the base strip extends at a right angle in a cross-sectional view both towards the inner surface of the support strip as well as towards the inner surface of the transition section.

9. A connection element as defined in claim 1 , wherein the interlock profile is designed in its dimensions for receiving an interlock of a LARSSEN sheet pile or of a HOESCH sheet pile to be connected.

10. A connection element as defined in claim 1 , wherein a connection profile for connecting to the carrier element is provided at the side of the base strip that faces away from the interlock profile.

11. A connection element as defined in claim 1 , wherein the attachment profile is defined by the base strip, a first straight jaw strip that protrudes at an angle of 90° from the side of the base strip that faces away from the interlock profile and a second jaw strip that protrudes from the base strip at a distance from the first jaw strip and is bent in the direction of the first jaw strip.

12. A connection element as defined in claim 11 , wherein the bent second jaw strip of the attachment profile and the support strip of the interlock profile are designed at the base strip directly adjacent to each other and wherein their outer flat sides transition preferably flush into each other.

13. A connection element as defined in claim 11 , wherein the bent second jaw strip of the attachment profile and the transition section of the hook strip are designed at the base strip directly adjacent to each other.

14. A connection element as defined in claim 10 , wherein the attachment profile exhibits two jaw strips that protrude from the base strip and extend at least approximately parallel to each other, between which the carrier element is to be inserted with its fastening section for attachment.

15. A connection element as defined in claim 10 , wherein the attachment profile, viewed in the cross-section of the connection element, is formed at the base strip offset with regard to the interlock profile in such a manner that one of the two jaw strips is set off towards the outside with regard to the transition section of the hook strip.

16. A connection element as defined in claim 1 , wherein the connection element is designed as a weld-on element that can be connected to the carrier element by welding.

17. A connection element as defined in claim 16 , wherein at the base strip that faces away from the interlock profile, a weld-on strip for welding to the carrier element protrudes in at least approximately rectangular fashion.

18. A connection element as defined in claim 16 , wherein on the side of the base strip that faces away from the interlock profile, two weld-on elevations are provided that extend in the longitudinal direction of the connection element and extend parallel at a distance to each other preferably near the two face sides of the base strip.

19. A combination sheet pile wall that is formed of carrier elements, and at least one sheet pile that is arranged between two respective carrier elements, whereby a connection element is provided between the carrier elements and the sheet pile for the purpose of connecting them, where an interlock profile is formed at said connection element that engages with an interlock that is formed at the sheet pile and that is connected to the carrier element, the improvement wherein at least one of the connection elements is a connection element according to claim 1 .

20. The sheet pile wall according to claim 19 , wherein the carrier elements include at least one I beam and at least one sheet pile that is arranged between two respective carrier elements.