电渗法中排水固结理论与实践的若干问题

Some Problems on Theory and Application of Drainage Consolidation in Electroosmotic for Ground Improvement

从工程应用的角度,对地基处理中的电渗法加固机理、适用性、等效加固荷载、电极材料、与其它方法的联合及相关实用技术进行了讨论。从排水固结考虑,电渗法适合加固的是电渗透系数和电阻率较大、水力渗透系数适中的土体。电渗加固中,无恒定的等效加固荷载。电渗常常需要与常规排水固结法联合以提高加固效果。研制不腐蚀的材料对电渗加固具有重要意义。电极转换和间歇通电有利于减少电能在电极与土体接触面的消耗,提高电能利用率。

For engineering application,some problems of drainage consolidation in electroosmotic for ground improvement were discussed.These problems includes improvement mechanism,applicability,equivalent load,material of electrode,combination with other methods and some practical technique.In aspects of drainage consolidation methods,electroosmotic is suitable for soils which have larger electroosmotic permeability,larger electrical resistively and moderate hydraulic permeability.There is no unique equivalent load in electroosmotic process.It will be better to adopt other soil improvement methods in combination with electroosmosis.Electrodes made of incorrosive material are important for electroosmosis.Electrodes reversal and intermittent current are favourable to reduce the power consumption on the contact surface between electrode and soils,and improve the efficiency of the power.