Influence of Water Boundary Conditions on Pore Pressure and Improvement Effect in Electroosmosis
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摘要
The influence of water boundary conditions on pore pressure was studied by one-dimensional electroosmotic consolidation test, and the effects of electroosmosis, pore water pressure,settlement and electroosmotic flow were monitored and analyzed.The results show that the boundary conditions of electroosmotic water have a significant effect on the pore water pressure and improving effect. Negative pore water pressure without auxiliary water is far greater than the replenishment. The measured data show that improvements in experiments without replenishment are also better. The calculation of Esrig solution of the pore water pressure is consistent with the measurement data in the watersupplementing test and is very different from the measurement data in the test without rehydration. Considering the impact of water boundary conditions is the key to electroosmosis experiments and applications.
The influence of water boundary conditions on pore pressure was studied by one-dimensional electroosmotic consolidation test, and the effects of electroosmosis, pore water pressure,settlement and electroosmotic flow were monitored and analyzed.The results show that the boundary conditions of electroosmotic water have a significant effect on the pore water pressure and improving effect. Negative pore water pressure without auxiliary water is far greater than the replenishment. The measured data show that improvements in experiments without replenishment are also better. The calculation of Esrig solution of the pore water pressure is consistent with the measurement data in the watersupplementing test and is very different from the measurement data in the test without rehydration. Considering the impact of water boundary conditions is the key to electroosmosis experiments and applications.
The influence of water boundary conditions on pore pressure was studied by one-dimensional electroosmotic consolidation test, and the effects of electroosmosis, pore water pressure,settlement and electroosmotic flow were monitored and analyzed.The results show that the boundary conditions of electroosmotic water have a significant effect on the pore water pressure and improving effect. Negative pore water pressure without auxiliary water is far greater than the replenishment. The measured data show that improvements in experiments without replenishment are also better. The calculation of Esrig solution of the pore water pressure is consistent with the measurement data in the watersupplementing test and is very different from the measurement data in the test without rehydration. Considering the impact of water boundary conditions is the key to electroosmosis experiments and applications.
引文
[1]Casagrande L.Electro-Osmotic Stabilization of Soils[J].Journal of the Boston Society of Civil Engineers,1952,39(1):51-83.
[2]Bjerrum L,Moum J,Eide O.Application of Electro-Osmosis to a Foundation Problem in a Norw egian Quick Clay[J].G eotechnique,1967,17(1):214-235.
[3]Casagrande L.Stabilization of Soils by Means of Electro-Osmosis—State-of-the-Art[J].Journal of the Boston Society of Civil Engineers,1983,69(2):255-302.
[4]Lo K Y,Inculet I I,Ho K S.Electroosmotic Strengthening of Soft Sensitive Clays[J].Canadian G eotechnical Journal,1991,28(1):62-73.
[5]Estabragh A R,Naseh M,Javadi A A.Improvement of Clay Soil by Electro-Osmosis Technique[J].Applied Clay Science,2014,95(3):32-36.
[6]Mitchell J K.Fundamentals of Soil Behavior[M].New York,John Wiley&Sons,1993.
[7]Alshawabkeh A N,Sheahan T C,Wu X Z.Coupling of Electrochemical and M echanical Processes in Soils under DC Fields[J].Mechanics of Materials,2004,36(5/6):453-465.
[8]Cardoso R,Santos J N.Experimental Study on the Use of Electroosmosis for Accelerating the Consolidation of Clays under Increasing Vertical Stress[C].The Fifth Biot Conference on Poromechanics,Vienna,Austria,2013:1515-1523.
[9]Esrig M I.Pore Pressures,Consolidation,and Electrokinetics[J].Journal of the Soil Mechanics and Foundations Division,1968,94(4):899-920.
[10]Gabrieli L,Alshawabkeh A N.Influence of Boundary Conditions on Transient Excess Pore Pressure during Electrokinetic Applications in Soils[J].Journal of Applied Electrochemistry,2010,40(6):1113-1121.
[11]Chien S C,Teng F C,Ou C Y.Soil Improvement of Electroosmosis w ith the Chemical Treatment using the Suitable Operation Processs[J].Acta G eotechnica,2014,10(6):1-8.
[12]Han S J,Kim S S,Kim B I.Electroosmosis and Pore Pressure Development Characteristics in Lead Contaminated Soil during Electrokinetic Remediation[J].G eosciences Journal,2004,8(1):85-93.
[13]Asavadorndeja P,Glawe U.Electrokinetic Strengthening of Soft Clay Using the Anode Depolarization M ethod[J].Bulletin of Engineering G eology and the Environment,2005,64(3):237-245.
[14]Burnotte F,Lefebvre G,Grondin G.A Case Record of Electroosmotic Consolidation of Soft Clay w ith Improved Soil–Electrode Contact[J].Canadian G eotechnical Journal,2004,41(6):1038-1053.
[15]Chien S C,Ou C Y,Wang M K.Injection of Saline Solutions to Improve the Electro-Osmotic Pressure and Consolidation of Foundation Soil[J].Applied Clay Science,2009,44(3/4):218-224.
[16]Fourie A B,Jones C J F P.Improved Estimates of Power Consumption during Dew atering of M ine Tailings Using Electrokine[J].G eotextiles and G eomembranes,2010,28(2):181-190.
[17]Lefebvre G,Burnotte F.Improvements of Electroosmotic Consolidation of Soft Clays by M inimizing Pow er Loss at Electrodes[J].Canadian G eotechnical Journal,2002,39(2):399-408.
[18]Wu H,Hu L M,Qi W G,et al.Analytical Solution for Electroosmotic Consolidation Considering Nonlinear Variation of Soil Parameters[J].International Journal of G eomechanics,2016,17(5):060160321-060160329.
[19]Yuan J,Hicks M A.Large Deformation Elastic Electro-Osmosis Consolidation of Clays[J].Computers and G eotechnics,2013,54(10):60-68.
[20]Alshawabkeh A N,Acar Y B.Electrokinetic Remediation II:Theoretical M odel[J].Journal of G eotechnical Engineering1996,122(3):186-196.
[21]Fredlund D,Rahardjo H.Soil Mechanics for Unsaturated Soils[M].New York:Wiley,1993.
[22]Technical Code for Ground Treatment of Building:JGJ79-2012[S].Beijing:China Architecture&Building Press,2012.(in Chinese)
[2]Bjerrum L,Moum J,Eide O.Application of Electro-Osmosis to a Foundation Problem in a Norw egian Quick Clay[J].G eotechnique,1967,17(1):214-235.
[3]Casagrande L.Stabilization of Soils by Means of Electro-Osmosis—State-of-the-Art[J].Journal of the Boston Society of Civil Engineers,1983,69(2):255-302.
[4]Lo K Y,Inculet I I,Ho K S.Electroosmotic Strengthening of Soft Sensitive Clays[J].Canadian G eotechnical Journal,1991,28(1):62-73.
[5]Estabragh A R,Naseh M,Javadi A A.Improvement of Clay Soil by Electro-Osmosis Technique[J].Applied Clay Science,2014,95(3):32-36.
[6]Mitchell J K.Fundamentals of Soil Behavior[M].New York,John Wiley&Sons,1993.
[7]Alshawabkeh A N,Sheahan T C,Wu X Z.Coupling of Electrochemical and M echanical Processes in Soils under DC Fields[J].Mechanics of Materials,2004,36(5/6):453-465.
[8]Cardoso R,Santos J N.Experimental Study on the Use of Electroosmosis for Accelerating the Consolidation of Clays under Increasing Vertical Stress[C].The Fifth Biot Conference on Poromechanics,Vienna,Austria,2013:1515-1523.
[9]Esrig M I.Pore Pressures,Consolidation,and Electrokinetics[J].Journal of the Soil Mechanics and Foundations Division,1968,94(4):899-920.
[10]Gabrieli L,Alshawabkeh A N.Influence of Boundary Conditions on Transient Excess Pore Pressure during Electrokinetic Applications in Soils[J].Journal of Applied Electrochemistry,2010,40(6):1113-1121.
[11]Chien S C,Teng F C,Ou C Y.Soil Improvement of Electroosmosis w ith the Chemical Treatment using the Suitable Operation Processs[J].Acta G eotechnica,2014,10(6):1-8.
[12]Han S J,Kim S S,Kim B I.Electroosmosis and Pore Pressure Development Characteristics in Lead Contaminated Soil during Electrokinetic Remediation[J].G eosciences Journal,2004,8(1):85-93.
[13]Asavadorndeja P,Glawe U.Electrokinetic Strengthening of Soft Clay Using the Anode Depolarization M ethod[J].Bulletin of Engineering G eology and the Environment,2005,64(3):237-245.
[14]Burnotte F,Lefebvre G,Grondin G.A Case Record of Electroosmotic Consolidation of Soft Clay w ith Improved Soil–Electrode Contact[J].Canadian G eotechnical Journal,2004,41(6):1038-1053.
[15]Chien S C,Ou C Y,Wang M K.Injection of Saline Solutions to Improve the Electro-Osmotic Pressure and Consolidation of Foundation Soil[J].Applied Clay Science,2009,44(3/4):218-224.
[16]Fourie A B,Jones C J F P.Improved Estimates of Power Consumption during Dew atering of M ine Tailings Using Electrokine[J].G eotextiles and G eomembranes,2010,28(2):181-190.
[17]Lefebvre G,Burnotte F.Improvements of Electroosmotic Consolidation of Soft Clays by M inimizing Pow er Loss at Electrodes[J].Canadian G eotechnical Journal,2002,39(2):399-408.
[18]Wu H,Hu L M,Qi W G,et al.Analytical Solution for Electroosmotic Consolidation Considering Nonlinear Variation of Soil Parameters[J].International Journal of G eomechanics,2016,17(5):060160321-060160329.
[19]Yuan J,Hicks M A.Large Deformation Elastic Electro-Osmosis Consolidation of Clays[J].Computers and G eotechnics,2013,54(10):60-68.
[20]Alshawabkeh A N,Acar Y B.Electrokinetic Remediation II:Theoretical M odel[J].Journal of G eotechnical Engineering1996,122(3):186-196.
[21]Fredlund D,Rahardjo H.Soil Mechanics for Unsaturated Soils[M].New York:Wiley,1993.
[22]Technical Code for Ground Treatment of Building:JGJ79-2012[S].Beijing:China Architecture&Building Press,2012.(in Chinese)