Construction technology of drainage consolidation method in soft soil foundation treatment;

This paper introduces calculation method of soft ground settlement,addresses drainage consolidation method co-operated with preloading method to solve the post construction settlement,analyses relationship of ground consolidation with surcharge quantity and surcharge operation time,and gives the proposal to increase unload check norm according to ground consolidation property.

Combining with projec,introduct one kind of new soft soil foundation treatment technology——drainage consolidation and dry jet mixing pile composite foundation.

Aiming at the character of this soft soil roadbed,a method of sand well,sand cushion and overloading prepress was used in consolidation by drainage,which gets obvious engineering benefit and social benefit.

Study on theory of shear strength increment of soil body by draining consolidation for improving soft clay;

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.

By analyzing benefit and shortcoming of the mechanism of draining consolidation way under vacuum preloading and surcharge, back sequence construction is proposed and the idea can ultimately advance economic value after meeting the essential sedimentation of the construction and the finished construction.

The method of drained consolidation becomes more wide-ranging in application of soft foundation treatment as the developments of express highway more fast.

Requirements of thickness of sand mats for consolidation method;

The paper presents a new way to consolidate soft soil,that is,the cement deep mixing pile method(DMM) and the consolidation method with prefabricated vertical drains(PVD) are used in combination to consolidate the thick soft soil foundation,with short DMM used to improve the shallow soft soil and long PVD penetrating into the deeper soft soil layers.