Reinforced concrete pile, pile assembly, method of joining the piles' heat transfer pipes to each other, and method of fabricating a reinforced concrete pile

A reinforced concrete pile, which is adapted to be driven into the ground for supporting a building or the like structure, the pile comprising at least one heat transfer pipe for circulating a heat transfer fluid within the pile, at least one of the ends of the reinforced concrete pile constituting a splicing end, by which splicing end said pile is connectible to another identical or similar pile for constructing a longer pile assembly, and whereby, at said splicing end, said at least one heat transfer pipe is adapted to be connected to a respective heat transfer pipe of the pile connectible to the discussed splicing end, wherein the pile has its splicing end fitted with a positioner sleeve which surrounds the heat transfer pipe's end in such a way that between the heat transfer pipe and the positioner sleeve develops an annular space for receiving a sealing sleeve, which is made at least partially from a plastically deformable material and which extends outward from the pile's splicing end, and the positioner sleeve has its end, which is further from said splicing end of the pile, designed to decrease in its inner diameter towards the discussed end in such a manner that, in the process of coupling two piles to each other, and when hammering the upper pile towards the lower pile, the sealing sleeve disposed in the annular space has its end within the positioner sleeve's decreasing inner diameter zone deforming plastically, thereby sealing against the heat transfer pipe's external surface.