injected the injecting pipe 7 may be first arranged at the bottom of the expansion element 6 and in the course of injection the injecting pipe may be drawn upwardly and finally the injecting pipe 7 may be drawn out altogether if so desired from the inside of the expansion element 6 thus in this case the expansion element 6 and the polymer 8 therein constitute the cohesion pillar 5 without any other structures the cohesion pillar 5 is thus formed preferably such that first is expanded the lower part of the expansion element 6 only thereafter the polymer 8 is injected such that the expansion element 6 is filled up from bottom upwards the expanded portion of the lower part of the expansion element 6 anchors the cohesion pillar in the ground which enables the injecting pipe 7 being drawn upwardly without the expansion element 6 substantially rising upwardly in the ground this solution disturbs the ground surface and superficial parts as little as possible the structure to be supported may thus be an existing structure such as a building 1 through the foundation of which there is provided a hole through which are arranged the expansion element 6 and the injecting pipe 7 the solution disclosed here is particularly well suited for supporting ground supported structures the polymer 8 is injected through the injecting pipe and it does not react until in.