Experimental Search For Composite Vacuum Preloading Method And Treatment Of Deep Soft Foundation

At present,along with the growth of population and economic sustainable development in our country,human demand for land will increase,tidal flat reclamation stretched out is an important way to solve this problem,the vacuum preloading method to deal with artificial reclamation silt soil can shorten the construction period and the treatment effect is well,widely used in the processing of coastal reclamation silt,But the traditional vacuum preloading method for deep soil reinforcement effect is poor,it is difficult to improve the integrity and stability of the soil,so need to make further research and improvement in the method and technology,after vacuum preloading method to deal with deep silt soil reinforcement,meet the needs of the engineering construction.This paper widely distributed on the coastal reclamation of tidal flats in wenzhou silt characteristics of high moisture content、low bearing capacity,according to the physical and mechanical characteristics of the muddy soil reclamation district of wenzhou,employThe vacuum preloading method to reinforce deep silt soft soil foundation in indoor and field test study,improve the vacuum preloading method to deal with deep soft soil foundation reinforcement effect.on the basis of tidal flats super soft soil foundation treatment,theoretical research and engineering practice through the indoor model test,the theoretical analysis and site pilot project,the deep development of new technology of double vacuum preloading,wenzhou muddy solving problem of reclaimed soil foundation treatment.The main content of the research as follows:(1)Unearthed specimens from the scene and according to the relevant standard beach area is obtained by indoor geotechnical experiment testing the basic physical property parameters of silt soil,conduct systematic test analysis and researc silt soil particle composition,mineral composition,chemical composition,microstructure,secrete water process and the characteristics,for subsequent reclamation silt soil reinforcement to provide reference and basis.(2)Through study compared the surface settlement of soil vacuum monitoring,and after the soil moisture content,vane shear strength under the different drainage plate spacing,find out the effect of vacuum preloading load optimal drainage plate spacing,using four different vacuum preloading drainage plate spacing indoor modelexperiment research,combined with site test and test results optimizing best drain spacing,provide a reliable reference basis for engineering design.(3)Through the research and development of engineering test new plastic drainage plate,exploit deep development with new technology of double vacuum preloading,and through the field test in real time monitoring of the indicators of soil reinforcement,according to the measured data to predict the foundation consolidation condition,to determine the reasonable unloading time,timely grasp of the foundation soil in the process of strengthening consolidation and deformation of the soil,thus the construction quality and the strengthening effect of foundation to make correct assessment;(4)Through the drilling sampling,the soil physical and mechanical index test inside and outside in field soil,the moisture content test and field vane shear test,static cone penetration test and plate load test,it is concluded that the optimal depth of band drain can and according to the test results of deep soil consolidation effect is analyzed.