Following the building’s groundbreaking

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To build a garage that does not flood, the building’s general contractor, a joint venture between Civic Construction and Ant Yapi U.S., along with specialty subcontractor Keller International, set out to create a massive watertight concrete box deep underground. Using highly advanced technology and equipment, the complicated undertaking requires workers to drill 800 holes 15 m deep into the ground and fill them with concrete and water. The interlocking pillars create a cement block that is hollowed out to build the garage.

earlier this year, the construction team embarked on the deep-soil-mixing construction rcs data process to create a giant waterproof ‘bathtub’ that protects the building’s concrete mat above the tub from the groundwater and forms the base of the garage. Engineers are now using a state-of-the-art, 3-m (10-ft) high-torque drill to create the bathtub by

digging into the site’s crushed limestone, while simultaneously injecting cement slurry into the ground and blending it with the limestone rock and sand. This process changes the composition of the soil, creating a support system for the bathtub’s walls and floor while ultimately reducing waterflow and permeability to allow for excavation of the site.