Experiments on response of piezometric level to vibrations under hydrostatic condition
Gu Hongbiao
Zhang Huang
Gu Jianfen
Zhang Yan
Chi Baoming
Abstract：This paper explores the response of water-level on the vibrations under hydrostatic condition by carrying on the experiments that put selfdesigned well-confined aquifer seepage system on the earthquake simulation shaking table.The experiment includes 12 groups of sine vibrations whose frequencies fin in turns are 0.5,1,2,5,10,15 Hz and accelerations ain are 1.5,2.5 m/s2,respectively.The results indicate:piezometric level presents four kinds of response patterns,that is,ascending,ascending-oscillating,oscillating and descending oscillating,which are similar with water level variation patterns resulted from earthquakes;among the twelve groups of vibrations,the water level in observation well and pore water pressure were likely to decrease at low frequency (fin =1,2 Hz),and increase at mid-high frequency (fin =5,10 Hz),oscillate at high frequency (fin =15 Hz),and the acceleration peak also affects their variation patterns;their variation amplitudes increase first,and then decrease with the increase of input frequency.The maximum amplitude variation respectively appears at the two vibration conditions of ain 1.5 m/s2,fin10 Hz and ain =2.5 m/s2,fin=5 Hz.
Keywords：hydrostatic conditionshaking table experimenthomogeneous confined aquiferpiezometric level
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：13( 407-419 )