软黏土地基电渗加固的设计方法研究

Design method of electro-osmosis reinforcement for soft clay foundations

土地紧张促进电渗近年来在软黏土地基加固中的大量应用,但是对其设计方法的研究却很少。从电渗的机理入手,研究了电渗过程及其电极电解反应;接着分析了土体性质、电极、电源输出和通电方式等四方面因素对电渗固结的影响,并列表总结;随后,综合已有的电渗实例,提出了软黏土电渗加固的设计计算方法;最后举例说明方法的使用。该方法主要面对常见的金属电极长方形布置的电渗处理,经简单改变也能适用其他情况。其优点是能够评价场地的电渗处理适宜性,可以考虑场地地质条件的影响,并且通过控制参数取值范围的方法来提高电渗效率。

The lack of land promotes the application of electro-osmosis reinforcement in soft clay foundations,but insufficient attention is given to its design method.Electro-osmotic process and electrodes electrolytic reaction are studied based on the electro-osmotic mechanism.The influences of four different kinds of factors on the electro-osmosis are analyzed,including soil properties,electrode,power output and power modes.An electro-osmotic design method for soft clay foundations is proposed based on the existing cases and illustrated by an example.The proposed method can be applied in the electro-osmotic treatment of common metal electrodes arrayed in rectangle and in other conditions after simple modifications.It has the abilities to evaluate electro-osmotic treatment suitability of sites,to consider the influence of site geological conditions and to improve the efficiency of electro-osmosis by controlling the parametric values.