碱渣土的真空-电渗联合排水固结特性试验研究

文中给出了碱渣土的真空预压排水法和真空-电渗联合法排水固结的对比试验结果,分析了真空-电渗联合法的排水固结机理.室内模型试验结果表明,真空预压排水法和真空-电渗联合法对碱渣土均具有明显的排水效果,且真空-电渗联合法比真空预压法的排水效果更加显著.尤其是在真空预压排水结束后,真空-电渗联合法仍产生明显的排水效果,具有水头梯度下的排水固结和电场作用下的电渗排水固结两方面的排水固结机理,因而比单纯的真空预压的排水速率快,排水固结量大.文中结果可扩展用于对软土地基的加固.

Experimental Investigation into Draining Consolidation Behavior of Soda Residue Soil Under Vacuum Preloading-Electro-Osmosis

This paper deals with some contrast experiments to compare the draining consolidation efficiency of the vacuum preloading(VP) method and the vacuum preloading-electro-osmosis(VPE) method with soda residue soil as the medium,and analyzes the mechanism of draining consolidation caused by the VPE method.It is indicated by indoor model tests that both the two methods are of obvious draining effect on soda residue soil,especially the VPE method,that the VPE method possesses obvious draining effect even after the drainage has been finished,and that the mechanism of draining consolidation caused by the VPE method lies in the seepage flow under waterhead gradient and electric field, which results in a higher draining velocity and a larger consolidation amount.The experimental results on the soda residue soil are also useful to the foundation consolidation of soft soil.