Suction foundation having enhanced self-weight penetration and construction method thereof

A suction foundation having enhanced self-weight penetration, the suction foundation pentrating into a seabed by vacuum pressure of a suction pump, and providing a foundation support force, the suction foundation comprising:

• a hollow caisson having an opening at a lower end thereof and formed into a tub shape, the hollow caisson introducing fluid on a seabed through the opening thereinto while the hollow caisson is landed on the seabed by its own weight, the suction pump being connected to the hollow caisson, the suction pump allowing the hollow caisson to penetrate into the seabed while discharging the fluid in the hollow caisson to an outside thereof by using the vacuum pressure of the suction pump;
• a lower skirt provided along a circumference of the opening of the hollow caisson and formed into a wave shape having a series of teeth, and having wedge-shaped cross-sections, the lower skirt penetrating into the seabed using the teeth thereof when the hollow caisson is landed initially on the seabed by its own weight;
• and
• a stiffener increasing rigidity of the lower skirt by increasing thickness of a predetermined portion of the lower skirt,
• wherein,
• the stiffener includes a reinforcing blade protruding from each of the teeth that constitute the lower skirt and extending along a longitudinal direction of the hollow caisson, the reinforcing blade increasing the rigidity of the teeth.