Concrete pile made of such a concrete and method for drilling a hole adapted for receiving the improved concrete pile in a weak ground

#The invention relates to improvements in a ground, and possibly thereover, especially a weak ground such as a clay.

#Various types of foundations are already known for erecting facilities, buildings, and supermarkets or for obtaining an embankment for a highway, for example.

#It is especially known to dispose piles in the ground above which the building is erected. However, it is traditionally required to dispose a network of structural inclusions (beams, piles, etc.) made of a traditional reinforced concrete for supporting the floor of the building, or the road. If the piles are disposed in a mechanically weak ground, the strength induced by the building is typically essentially transmitted by the piles to a harder portion of the ground. Thus, substantially no charge of the building is transmitted to the weak ground.

#A more detailed description is given below, with reference to the Figures, in which:

#FIG. 1 diagrammatically shows a section of ground including piles for erecting a structure on the ground;

#FIG. 2 is a view from the above of the ground illustrated in FIG. 1;

#a) An Improved Concrete

#As abovementioned, the invention relates to an improved concrete having a low modulus of elasticity E (also called Young's modulus). Using an elastic, or rubbery, material to be incorporated in a traditional concrete, reduces the modulus of elasticity of such a traditional concrete, without notably reducing the strength of the resulting concrete in the same proportion. Thus, incorporating such a rubbery material in a traditional concrete will induce a long-term modulus of elasticity E comprised between about 1000 to 2500 MPa, for an ultimate compression strength comprised between substantially 2 and 12 MPa. The above-disclosed concrete is adapted for obtaining such a result.

#According to a specific embodiment, said specific concrete can be composed as follows (it is to be noted that the following composition is for obtaining 1 m3 of powdered concrete, excluding water). So, the composition in dry weight is as follows: