Abstract: Relatively impermeable earth such as clay is made permeable so as to effectively produce drains or draining layers by injecting into the earth one or more substances chemically reacting with and/or physically cooperating with one or more of the natural constituents of the earth to thereby increase the permeability within the injection zone and to thereby produce a drain or a draining layer.

Abstract: The invention refers to a foundation or support arrangement to be secured to the lowermost surface of a construction or to one of the lowermost surfaces of a number of legs for supporting a construction intended for marine or submarine installation. According to the invention the foundation or support arrangement comprises a plurality of downwardly directed support elements defining one or more cells or spaces therebetween which are open at the bottom. Said support elements are arranged to penetrate into any deposits present on the bottom of a sea or lake when the construction is positioned on the bottom, said deposits being received in the cells or spaces to a degree dependent on the contour of the bottom.