LIU Jianhua.Study on Shaking Table Tests of Electrolytic Desaturation Treatment for Tunnel Engineering[J].Journal of Disaster Prevention and Mitigation Engineering,2025,45(02):468-476.
LIU Jianhua.Study on Shaking Table Tests of Electrolytic Desaturation Treatment for Tunnel Engineering[J].Journal of Disaster Prevention and Mitigation Engineering,2025,45(02):468-476. DOI: 10.13409/j.cnki.jdpme.20230824002.
Study on Shaking Table Tests of Electrolytic Desaturation Treatment for Tunnel Engineering
Tunnel engineering projects are particularly vulnerable to seismic liquefaction hazards due to their long spans. In this study
researchers propose an electrolytic desaturation method based on the principle that reducing foundation saturation improves liquefaction resistance. For cut-and-cover tunnel projects in deep liquefiable sandy soil foundations
shaking table model tests were conducted to evaluate the reinforcement performance of the electrolytic desaturation method. Additionally
the soil acceleration around the tunnel
pore pressure variation
and tunnel uplift displacement were monitored. The test results showed that the electrolytic desaturation method provided excellent anti-liquefaction reinforcement performance
significantly restraining the uplift of tunnel structures. Pore pressure variation was the key factor affecting liquefaction occurrence. After the electrolysis of saturated sandy soils
a significant reduction in excess pore pressure was observed. Compared with the untreated condition
two conditions with different electrolytic treatments achieved maximum reductions of 68.1% and 70.3% in peak excess pore pressure. The positions of maximum reductions were all located at the bottom of the tunnel model
and the anode-cathode arrangement had a certain effect on both desaturation efficiency and anti-liquefaction performance. Both electrolytic treatments reduced the maximum uplift displacement of the tunnel model compared to the untreated condition
with reduction amplitudes exceeding 35%. The research findings demonstrate that the electrolytic desaturation method effectively controls the uplift deformation of tunnel structures in liquefiable foundations.
Su L , Zhao Z , Bi J W , et al . Numerical simulation of shake table test on dynamic response of pile foundation in liquefiable ground using FLAC 3D [J]. Journal of Disaster Prevention and Mitigation Engineering , 2022 , 42 ( 3 ): 454 - 463 . (in Chinese)
Zhang X D , Hou Y J , Liang J H , et al . Dynamic centrifuge tests on liquefaction of saturated sand foundation [J]. Journal of Hydraulic Engineering , 2014 , 45 ( Sup2 ): 105 - 111 . (in Chinese)
Wu Q , Xu Y , Chen G X . Review of soil liquefaction manifestation and its consequences for 11 earthquakes in china over the last 20 years [J]. Journal of Disaster Prevention and Mitigation Engineering , 2022 , 42 ( 5 ): 961 - 975 . (in Chinese)
Chen Y M , Liu H L , Shao G J , et al . Laboratory tests on flow characteristics of liquefied and post-liquefied sand [J]. Chinese Journal of Geotechnical Engineering , 2009 , 31 ( 9 ): 1408 - 1413 . (in Chinese)
Huang Y , Yu M , Bhattacharya S . Review on liquefaction-induced damages of soils and foundations during 2011 of the Pacific Coast of Tohoku Earthquake (Japan) [J]. Chinese Journal of Geotechnical Engineering , 2013 , 35 ( 5 ): 834 - 840 . (in Chinese)
Zhang X W , Zhu W D , Li H , et al . Study on uplift behavior and anti-liquefaction measures for subway station during seismic loadings [J]. World Earthquake Engineering , 2020 , 36 ( 1 ): 205 - 211 . (in Chinese)
Wang W Z , Liao C C , Zhou X L , et al . The floating of underground structure in liquefiable soil layer and its control measures [J]. Earthquake Engineering and Engineering Dynamics , 2019 , 39 ( 3 ): 159 - 167 . (in Chinese)
Yegian M K , Eseller-Bayat E , Alshawabkeh A , et al . Induced-partial saturation for liquefaction mitigation: experimental investigation [J]. Journal of Geotechnical and Geoenvironmental Engineering , 2007 , 133 ( 4 ): 372 ‑ 380 .
Chen Y M , He S K , Wu H Q , et al . Model tests on liquefaction resistance of desaturation measures of electrolysis [J]. Chinese Journal of Geotechnical Engineering , 2016 , 38 ( 4 ): 726 ‑ 733 . (in Chinese)
Chen Y M , He S K , Fang Z . Field tests on liquefaction resistance of desaturation measure of electrolysis [J]. Chinese Journal of Geotechnical Engineering , 2017 , 39 ( 5 ): 832 ‑ 838 . (in Chinese)
He S K , Chen Y M , Fang Z , et al . Wave velocity characteristics of liquefiable foundation using electrolytic desaturation method [J]. Journal of Central South University(Science and Technology) , 2018 , 49 ( 2 ): 472 - 477 . (in Chinese)
Fourie A , Johns D , Jones C . Dewatering of mine tailings using electrokinetic geosynthetics [J]. Canadian Geotechnical Journal , 2007 , 44 ( 2 ): 160 ‑ 172 .
Fourie A , Jones C . Improved estimates of power consumption during dewatering of mine tailings using electrokinetic geosynthetics (EKGs) [J]. Geotextiles and Geomembranes , 2010 , 28 ( 2 ): 181 ‑ 190 .
Hu Y C , Wang Z , Zhuang Y F . Experimental studies on electro-osmotic consolidation of soft clay using EKG electrodes [J]. Chinese Journal of Geotechnical Engineering , 2005 , 27 ( 5 ): 582 ‑ 586 . (in Chinese)
Shen Y , Qiu C C , Song S X , et al . Experimental study on electro-osmosis chemical grouting reinforcement of marine soft clay using tubular EKG [J]. Chinese Journal of Geotechnical Engineering , 2017 , 39 ( Sup2 ): 57 ‑ 61 . (in Chinese)