This paper presents the results of series of numerical analyses using various simulation schemes to investigate the behavior of piled raft foundation, the possible effect of micro-pile installation on reducing ground movements and the creep deformation of deep excavation in TIFC (raipei Interaational Financial Center) Construction Project (or Taipei 101 project). The project possesses a large deep excavation area of 152.2mx159.14w, 5-story basement of 21.7m deep and 101-story steel reinforced concrete tower building of 508m high. In addition to the pile loading tests in the TIFC jobsite which consists of 3 compression piles and 2 extension piles, there totally 128 boreholes were drilled for sampling and a series of high quality laboratory tests and field tests were conducted to determine the physical and mechanical properties of soil stratum. Moreover, a well-organized instrumentation system was also established to monitor various ground responses and structural performances during the excavation.
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