Experimental Research For Vacuum Combine Surcharge Preloading Method And Lateral Displacement On Reclamation Aera

At present,the new land resource mainly through by coastal reclamation,but the treatment of newly reclaimed soil reclamation district and tidal flats soil has become the inevitable problems in the process of land building.In order to faster access to meet the requirements of engineering quality of land resources,avoid secondary treatment and secondary treatment is unqualified,too much impact on the environment,vacuum combined pile load preloading drainage consolidation method is widely used gradually.Compared with the vacuum preloading method,for a simple and easy to use the combined processing method in the construction process steps on more complex,more influence factors.So you need to further research,to meet our requirements for reclamation district soft soil treatment.Wenzhou tideland reclamation district,the author of this paper a series of bad engineering properties of soft clay ground,combined with the physical and mechanical properties of soil forming,from wenzhou second vocational technical secondary school,secondary processing experience,on the area of the tidal flats silt indoor model test research,improve the existing joint vacuum stack preloading process,and promote to the soft foundation treatment project of zhejiang industry and trade professional technology institute.Through the indoor experiment and project case studies,further improve the existing process,solve the wenzhou region soft foundation processing problems,the main content of the study are as follows:(1)In wenzhou tidal flats reclamation district silt,a series of indoor geotechnical experiment determine its physical and mechanical properties,combined with the geological exploration results,comprehensive analysis was carried out on the beach soil,for the subsequent laboratory test and field basis for processing.(2)The comparison of two different pile method of vacuum combined pile load preloading effect of settlement when the silt tidal flats,vacuum degree of change,horizontal displacement and pore pressure dissipation and vane shear strength and moisture content after processing to find out the appropriate heap load plan,research heap load plan for horizontal displacement and the influence of the reinforcement effect,explore the vacuum combined pile load during the processing of horizontal displacement law of development.(3)Based on the monitoring data actual project were analyzed,and the validation process of the horizontal displacement law of development,for this project adopts vacuum combined pile load to evaluate preloading process,determine reasonable stack and stop pump unloading time,and make a correct evaluation reinforcement effect of this project.Contrast district of monitoring data,engineering experience.(4)Through the drilling sampling,the plate load test,in-situ vane shear test and static cone penetration test data to analyze the strengthening effect of five different working condition,for the future of wenzhou area soft foundation treatment project of drain depth selection and stack technology to provide the reference,to improve the existing vacuum combined pile load preloading method more suitable for the wenzhou area.