Based on the equal strain consolidation model of vertical drains,the partial differential equations of the consolidation by sand drain ground were obtained,in which the influences such as the additional stress non-uniform distribution along depth with time-dependent preloading,and the well resistance and the smear action are taken into consideration.

This paper describes the application of sand wick stacking load and consolidated drained technique with the technique which earthwork material is sitted in road embankment and the "flag-wheel-addition" technique of fillingl to soft soil foundation in West Line of Guangzhu highway.

The application and effect analysis of preloading drainage consolidation method for Tianwan Nuclear Power Station east revetment soft foundation treatment.

Basing on the example,though supervising in the constructing process,including sedimentation around circumjacent road,sedimentation shallow,the press of interstice water,water table,the deep-seated tract in level displacement,we analyze the controlling process and effect in basal software disposal on overweighed pre-suppress draining concretion method.