关键词: 碱渣土, 真空预压法, 真空-电渗联合法, 排水固结, 机理

Abstract:

This paper deals with some contrast experiments to compare the draining consolidation eficiency 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 gradi-ent and electric field,which results in a higher draining velocity and a larger consolidation amount.The cxpcrimcntal results on the soda residue soil are also useful to the foundation consolidation of soft soil.

Key words: soda residue soil, vacuum preloading method, vacuum preloading-electro-osmosis method, draining consolidation, mechanism