| 摘要 |
<p>According to the invention, the prefabricated element or elements, which are intended to constitute the basement, have of themselves or are equipped by temporary addition with elements (29) of positive buoyancy. A ditch (6-7) is dug, which extends to the outside of the construction and below the latter, including at least the location envisaged for the prefabricated element (8), the volume of this ditch (6) on the outside of the construction (1) being of such a volume that it can accommodate the prefabricated element. This ditch is filled with water (3) to a sufficient level to make the prefabricated element float when lowered into the external part (6) of the ditch. The prefabricated element is brought, floating, from the external part of the ditch to its location under the construction and its level is adjusted by modification of its level of flotation. The invention makes possible the realisation of such basements with prefabricated elements. <IMAGE></p> |
