Long-term monitoring and design of piled raft of a 162 m high isolated residential tower

This paper offers long-term monitoring and design of piled raft foundation supporting a 162 m high isolated residential tower. The average contact pressure over raft is 600 kPa. The foundation consists of thirty-six 50 m long cast-in-place concrete piles which diameter are from 1.5 m to 1.9 m and compression strength is 48 N/mm². To confirm the validity of the foundation design, long-term field monitoring was performed in the settlement of the foundation and ground, axial loads and bending moments on the piles, contact earth pressure and pore-water pressure beneath the raft from the beginning of construction to over thirteen years after the end of construction. In addition, the piles’ bending moments due to differential settlements between center and corner of the raft can be well measured, however those are sufficiently small comparing to design values during earthquake. These values were almost stable after the end of construction.