Abstract:

This paper mentions to some issues in determination of the verticality of high-rise building using GPS. To determine the verticality of the high-rise building, there is a challenge of the effect of oscillations and displacement of the structure during the measurement. Based on some researches on determination of oscilation and displacement of the high structures, it is possible to conclude that the more than 100m high buildings have displacement with various magnitude and frequency. This displacement affect to the accuracy of surveying measurement in the very top floors. This issue is discussed and examined in this paper for the high-rise building project of Lotte Tower in Hanoi and from that a conclusion on the necessity of using GPS to determine the coordinates for the very top floors of the high-rise building is presented