![]() Nearly 62,000 Tons (56,234 MT) of excavated material were removed for the foundation. As the groundwater table existed at a depth of 19′ (5.79 m) sufficient care had to be taken to de-water the pit during excavation and concreting operations. The foundation had nine caverns within it to provide sheltered work space and means for anchoring the vertical tendons of the tower when post-tensioned.Ī giant backhoe was used to excavate earth and shale up to a depth of 50′. The Y shape raft was 22′ (6.71 m) thick and rested on shale at a depth of 50′ (14.24 m). The crisscross post-tensioning cables were used for preventing cracking. Y-shaped foundation, utilizing 9200 cubic yards (7046 M 3) of concrete, 500 T (453.5 MT) of reinforcement steel, and 40 T (36.28 MT) of thick prestressing cables, was constructed in only 4 months. Numerous photographs and test samples were taken to finalize the foundation depth and design. ![]() Soil investigation was done making 4 Nos., 30′ (9.14 m) diameter boreholes up to a depth of 100′ (30.48 m). For the world’s tallest structure, it was absolutely necessary for the foundation to be capable of both supporting the vertical load of the tower and resisting pressures induced by winds. What type of FOUNDATION was necessary for the world’s tallest structure and how was it constructed?įor any tall structure, its foundation plays an important role in its stability.
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