Influence And Effect Of Vacuum Preloading Combined With Surcharge Preloading Method On Foundation Reinforcement Of Dredger Fill

As countries to the development of coastal belt construction,the land demand increases,around adjust measures to local conditions to explore the method to solve the problem of shortage of land resources,spit of the sea is the most feasible method Reclaimed tidal marsh mud is made of the sea is soil,this kind of super soft soil moisture content over 80%,the soil compressibility is very big,so there are many problems in the practical engineering.Fill with high water content,high compressibility,high void ratio,poor permeability,shear strength of low strength and low carrying capacity of basic engineering properties,in order to meet the needs of the engineering construction,must carry on the foundation reinforcement.In order to explore a better reinforcement construction technology of the reclaimed soil foundation,in this paper,on the one hand,the specific design of the reclaimed soil vacuum combined pile load and explore the different stack preloading test materials for soil consolidation effect of research;on the other hand,according to the boundary conditions of indoor experiments in this paper,and the use of plastic drainage plate conversion formula and consolidation theory of sand drain,suitable for the model test of consolidation equation was deduced.In this paper,combined with the example of a blow in the new project in Wenzhou,an in-depth study of the foundation treatment There are five main aspects of the work:1.In this paper,through various channels to collect related data at home and abroad,this paper introduces the various the soft ground treatment method,and analyzes the advantages and disadvantages of each method of vacuum combined pile load preloading method,further analysis and research,form the point of strengthening effect,vacuum combined pile load preloading than vacuum preloading method or stack preloading method is better.(2)The vacuum preloading method as a preprocessing method based on Vacuum Preloading Method on the newly developed,has the double effect of vacuum preloading and surcharge preloading interaction,better reinforcement effect is achieved.In this laboratory test solution set,according to two parts,part is vacuum preloading scheme,on the other hand is stack preloading scheme.(3)By setting different stack material of vacuum combined pile load prepress test,to explore the analyses for the high moisture content,the compressibility of the bigger of the reclaimed soil foundation reinforcement mechanism,mainly aims at in the process of vacuum combined pile load preloading soil subsidence,vacuum degree,pore pressure change,moisture content after reinforcement and the construction technology and so on were studied?(4)Analysis of soft soil foundation consolidation theory,and combining with the boundary conditions of model test,this paper summarize the reasoning consolidation theory equation.(5)In this paper joined the Wenzhou district municipal road engineering example,analyzed the consolidation settlement of the project.