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 |