The present invention relates to method a fixed connection between two cantilever sheet piles using locks.

The use of cantilever sheet piles for the construction of retaining walls is well known. Used for the construction of such walls cantilever sheet piles are located along their longitudinal edges of the locks that hold the assembled interconnected their longitudinal edges of the cantilever sheet piles. Currently known locks type sheet piles locks with double hooks (locks type 1 according to EN 10248) or type locks LARSSEN made in the form of having in cross section the form of a bracket or hook elements with the internal cavity. In the construction of retaining walls in the ground first score the first pile, then in the upper end of the front in the direction of the length of the retaining wall of the castle first spotboy piles insert the lower end of the rear lock the second spotboy pile, which is then hammered into the ground, then in the same way score the third, fourth and all subsequent cantilever sheet piles forming a retaining wall.

In the construction of retaining walls, for example in the construction of port facilities, canals, or when digging trenches, it is often necessary in a stationary connection of adjacent sheet piles in the longitudinal direction. This is especially true where the problem is. when the retaining walls of the U-shaped sheet piles, which are interconnected locks lying in the neutral plane of the retaining wall.

Now for a fixed connection between the piles using locks use different hardening binders, in particular glue or cement. Such compounds, however, have limited shear. Such connections are also often unreliable due to the ingress of soil and/or water into the internal cavity of the castle.

In EP 0898021 was asked to implement a fixed connection between two cantilever sheet piles compression of the external connection parts formed by members with each other into engagement locks piles. For crimping the outer part of the educated locks connection you can use a special punch, deforming the locks under the action of the force generated by hydraulic hammer. Cantilever sheet piles, connected to each other with locks, permanently connecting with each other, for example, for education hammered into the ground multi-sheet junction consisting of two or three individual cantilever sheet piles. Obviously, this way the fixed connection of the piles can only be used if available at least one side of the locks. In other words, this method still cannot interconnect cantilever sheet piles hammered into the ground. Still have to connect Zab is made piles after removal of the substrate from one side of the retaining wall and gain access to one of the sides connecting the piles of locks. Often, however, the removal of soil from one side of the wall is accompanied by relative movement is not United motionless between the cantilever sheet piles and deformation of the retaining wall. Therefore, this method fixed connection cantilever sheet piles is not optimal. The possibility of relative displacements of the piles and deformation of the retaining wall during removal of soil from one side require, obviously, a development otherwise fixed connection hammered into the ground cantilever sheet pile retaining wall, which would still be interconnected in a hammered into the ground piles prior to the removal of soil from one side of the wall. For the construction of waterproof retaining walls of cantilever sheet piles the outer edges of the interconnected locks adjacent piles is usually welded with each other. Obviously, for connection by welding adjacent piles them interconnected locks must be available, i.e. weld between them is possible or not hammered into the ground piles, or hammered into the ground piles after removal of the substrate from one side of the wall. In this respect, the castles, which are connected two multi-cantilever sheet piles, consisting of several simultaneously hammered into the ground piles, should not be considered waterproof. When welding hammered into the ground piles after removal of the substrate from one side of the wall a large part on pornoi wall remains in the ground, and therefore, the weld may have a length not exceeding the height of the upper half of the length of the castle, and above all not exceeding one third of the length of the castle, because the rest of the remains inaccessible for welding. Therefore, this remaining inaccessible for welding a portion of the retaining wall should not be considered waterproof.

The present invention was based on the task to develop effective and reliable way fixed connection in the longitudinal direction locks the adjacent cantilever sheet piles in if they are to carry out the relevant works are not accessible externally. This problem is solved in the proposed method the fixed connection between two cantilever sheet piles using locks. The difference of the proposed method against known from GB 2322658 And is that in the gap between the castles cantilever sheet piles formed by a longitudinal groove head one is about castle and the internal cavity of another castle, lower welding electrode and weld in the gap between the castles of cantilever sheet piles.

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