US 12,345,012 B2
Weak soil anchor device to anchor one or several structures and method to arrange an anchor in weak soil
Trond Landbø, Bekkestua (NO); and Jon Hermstad, Oslo (NO)
Assigned to DR. TECHN. OLAV OLSEN AS, Lysaker (NO)
Appl. No. 17/640,088
Filed by DR. TECHN. OLAV OLSEN AS, Lysaker (NO)
PCT Filed Aug. 28, 2020, PCT No. PCT/NO2020/050220
§ 371(c)(1), (2) Date Mar. 3, 2022,
PCT Pub. No. WO2021/045626, PCT Pub. Date Mar. 11, 2021.
Claims priority of application No. 20191069 (NO), filed on Sep. 5, 2019.
Prior Publication US 2022/0298739 A1, Sep. 22, 2022
Int. Cl. E02D 5/80 (2006.01); E02D 27/50 (2006.01); E02D 27/52 (2006.01); E02D 9/02 (2006.01)
CPC E02D 5/80 (2013.01) [E02D 27/50 (2013.01); E02D 27/525 (2013.01); E02D 9/02 (2013.01); E02D 2200/1678 (2013.01)] 14 Claims
OG exemplary drawing
 
13. A method of arranging a weak soil anchor in weak soils to anchor one or more structures to a seabed, comprising:
fitting the weak soil anchor device with anchor lines attached to anchor brackets, the weak soil anchor device comprising an elongated inner continuous open box structure with a triangular cross-section comprising a first wall surface, a second wall surface, a third wall surface, and opposite ends, wherein the elongated inner continuous open box structure is open at both ends, and wherein the triangular cross-section of the elongated inner continuous open box structure is approximately constant along a vertical extent of the elongated inner continuous open box structure, an outer continuous open box structure with a smaller vertical extent than a vertical extent of the inner box structure and with a larger lateral extent than a lateral extent of the inner box structure and with a triangular cross-section consisting of a first outer wall surface, second outer wall surface, third outer wall surface, and with opposite ends, wherein a vertical center area, respectively, of the first outer wall surface, the second outer wall surface, and the third outer wall surface are connected to the elongated inner continuous open box structure in a lower region of an outer edge area between the first wall surface and the second wall surface, the second wall surface and the third wall surface and the third wall surface and the first wall surface, respectively, wherein the outer continuous open box structure is open at both ends, and wherein the triangular cross-section of the outer continuous open box structure is approximately constant along a vertical extent of the outer continuous open box structure; and wherein the anchor brackets are arranged in a lower outer area of the weak soil anchor device for utilizing a horizontal ground holding resistance of the seabed;
lowering the weak soil anchor device with a lower end area of the weak soil anchor device towards the weak soils; and
pressing the weak soil anchor device into the weak soil seabed with conventional piling frame equipment or by using a vibrohammer.