Title: Physical simulation of aquifer compression due to groundwater fluctuation
Authors: Chang, Wen-Jong
Chou, Shih-Hsun
Huang, An-Bin
土木工程學系
Department of Civil Engineering
Keywords: Ground subsidence;K-o-triaxial consolidation;Granular soil;Shakedown behavior;Compressibility
Issue Date: 14-Dec-2017
Abstract: To investigate the compression of granular aquifer induced by fluctuations of pore pressure, series of repeated pore pressure induced loading-unloading tests on specimens made of Ottawa sand mixed with mica were conducted in a K-o-triodal consolidation system. To simulate the stress paths in the field, the vertical displacements of soil specimens were monitored while maintaining a constant total vertical stress and applying sinusoidal fluctuations of pore pressure to specimens under K-o conditions. Shakedown theory is applied to interpret the testing data. The paper describes the laboratory setup, test procedure and findings from the test results. The results reveal that a shakedown behavior existed in saturated granular specimens and the accumulated permanent axial strains are 5 to 56 times of the values for conventional, monotonic loading. The finding evidently proves the significance of aquifer compression to ground subsidence due to repeated ground water fluctuations.
URI: http://dx.doi.org/10.1016/j.enggeo.2017.10.012
http://hdl.handle.net/11536/144310
ISSN: 0013-7952
DOI: 10.1016/j.enggeo.2017.10.012
Journal: ENGINEERING GEOLOGY
Volume: 231
Begin Page: 157
End Page: 164
Appears in Collections:Articles