Abstract:

The monitoring data of dam settlement are usually disturbed by uncertain factors and meteorological factors such as temperature, air humidity and light intensity. In order to remove those factors, a new method of wavelet analysis considering the effects of meteorological factors for dam settlement is proposed. Firstly, the functional relation between the monitoring data and the meteorological factors is established. And then based on the functional relation, the effects of meteorological factors on the monitoring data of dam settlement can be removed. Finally, based on the de-noising process of monitoring data by wavelet analysis, a dam settlement curve that is close to the practical situation can be obtained, which can provide dam stability evaluation with scientific basis. The results show that the new method of wavelet analysis considering the effects of meteorological factors is better than the method of direct wavelet analysis; and it can effectively remove noise signal caused by meteorological factors and other uncertain factors; and the dam settlement processed in this method agrees well with the numerical simulation results; and it has better feasibility and practical application value.

Key words: dam settlement monitoring, wavelet analysis, meteorological factors, de-noising processing