The Application And Analysis Of Vacuum Preloading In Soil Strength And Deformation

On the basis of the rapid economic development, the expansion of the construction scale in the coastal areas led to a tense situation of land for construction use, however, we have a long coastline and many sea islands, which is rich in the resources of tidal flat。So the land reclamation is an important solution to the tense situation of land for construction use. Among kinds of methods for frainage consolidation consolidation and drainage, the vacuum preloading method is a reliable and economical operation to consolidate extensive soft clay and super soft ground, which caused by the land reclamation.Vacuum preloading is used as the consolidation of soft soil in the vertical drainage system within the set, and then laying on the ground horizontal drainage layer, and covered in sand cushion sealing film, so isolated from the atmosphere, through the laying on the sand cushion in the water-absorbent pipeline, with a vacuum extraction device, its effect makes the reinforced soft foundation of its physical and mechanical properties of soil change in soil properties has been changed. The law reinforced in the process of soil strength and deformation analysis of mechanism for the reinforcement of great significance, it is necessary for further research.For the mechanism of vacuum preloading ,there still are conflicting views on theoretical research and engineering practice,. Based on previous research, this article explores the theoretical analysis of vacuum preloading growth and soil strength characteristics of soil deformation analysis reinforcement at different depths of the increase in soil strength and soil settlement and consolidation of the calculation method, Combined with previous studies, the views and the contents of the analysis of characteristics of vacuum preloading, the corresponding application in the project, the the vacuum preloading in Guangzhou Nanshagang, Construction of vacuum preloading process has been analyzed and research,and finite element numerical simulation on the vacuum preloading using Abaqus FEA software ,the conclusion of the engineering applications have some effect.