基于导电塑料排水板的真空-电渗同步固结解析解  

Coupling Consolidation Theory of Vacuum Preloading Incorporated with Electro-osmosis for Electric Vertical Drains

作　　者：孙召花[1] 吴昌将 包华[1] SUN Zhao-hua;WU Chang-jiang;BAO Hua(School of Civil Engineering and Architecture,Nantong University,Nantong 226019,China)

机构地区：[1]南通大学建筑工程学院,南通226019

出　　处：《科学技术与工程》2018年第33期197-202,共6页Science Technology and Engineering

基　　金：长江科学院开放研究基金(CKWV2018474/KY);江苏省高校自然科学研究面上项目(16KJB560010)资助

摘　　要：针对使用阴阳电极均为透水边界的导电塑料排水板(electric vertical drains,EVD)电极进行真空预压与电渗同步加固软基,对阳极建立了轴对称真空-电渗耦合固结模型。该模型考虑了真空预压与电渗由于引起水流方向的不同而产生的相互影响,并给出了阳极影响区域的平均孔隙水压力解析解。通过室内模型试验,验证得出阳极影响区域的孔压实测值与理论计算值在开始与结束时间段内吻合度较好,中间区域出现较大差异。这是由于在实际电渗过程中,阳极附近伴随发生了化学流、热流所引起的孔压变化,而理论公式中没有考虑它们所引起的水流。The coupling consolidation equations for axisymmetric model are established for anode affected area on the basis of the electric vertical drains(EVD)under the combined action of the vacuum preloading and electro-osmosis.The model considers the directions of the electro-osmotic current and water induced by vacuum preloading.The analytical solutions for average excess pore pressure of anode affected area are provided.A laboratory model test was conducted to further verify the validity of the model.The results show that it agrees well at the beginning and end in anode affected area.However,there are significant differences at intermediate time between the measured value and calculated value.That is because the coupling consolidation theory is not concerned with the flow of heat and electrochemistry.

关 键 词：真空预压 电渗 导电塑料排水板 耦合固结 

分 类 号：TU431[建筑科学—岩土工程]