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http://dx.doi.org/10.12652/Ksce.2022.42.4.0501

Study on the Determination of the Maximum Injection Pressure for Groundwater Rechargement  

Choi, Jin O (EPS Engineering)
Jeong, Hyeon Cheol (EPS Engineering)
Chung, Choong Ki (Seoul National University)
Kim, Chang Yong (Korea Institute of Civil Engineering and Building Technology)
Publication Information
KSCE Journal of Civil and Environmental Engineering Research / v.42, no.4, 2022 , pp. 501-508 More about this Journal
Abstract
Required essential technique is to determine the maximum recharge pressure in the well with condition of non-ground failure for the recovery of the groundwater. Based on the classical soil mechanics, the maximum recharge pressure was estimated with the numerical anlaysis and laboratory triaxial test. In the numerical analysis, the maximum recharge pressure is defined as the ground failure stress. The ground failure of the sand was defined as the piping and the one of the caly was to the undrained failure by the confined pressure increment. In the triaxial test, the recharge pressure in the ground was modified by the back pressure in the specimen. In case of sand, the volume strain was dramatically increased at the 93 % of the maximum back pressure, same meaning of the 0 effective stress state. In case of clay, the only radial volume strain was to reached 1.5 % without failure. Therefore, The maximum recharge pressure could be determined with the numerical analysis and triaxial test.
Keywords
Groundwater recharge; Recharge well; Maximum injection pressure; Back pressure test;
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