Vacuum Combined Preloading Tehnology Research And Application Under The Hydraulic Reclamation Silt Geological Conditions

With the development of national regional cooperation and development in full swing,for reclamation and utilization of coastal beaches,has become the most important project of marine economic development of tidal flat resources.There are some problems to be solved in soft foundation treatment in these areas.The choice of time point is very important,the vacuum preloading time will be too long to delay the construction period,the lack of function will lead to instability.At the same time,the film processing ditch should be taken seriously.In addition,the construction effect of direct drainage system and sand cushion drainage system has no precedent for comparative analysis in the same area.In this paper,the research work is carried out: ABAQUS software is used to compare the effect of different combinations,and then the optimal point is determined by interpolation method.The results were verified by data analysis.In addition,the treatment process of the lamination ditch necessary optimization,conducted a quantitative comparison of the effect of drainage straight type and sand cushion type.The following conclusions are drawn:1)In the simulation software analysis,the exact numerical value of the optimal time parameter is 16.14 d.The calculated value of the simulation software is slightly larger than the measured value,but the trend of the research object is basically consistent with the actual situation.2)To strengthen the film sealing effect,provides necessary technical guarantee for keeping vacuum,which provides a direction to promote technology improvement.3)The direct drainage system and sand cushion system has been studied,and the monitoring data has been obtained.The analysis results show that the direct drainage technology is better than the sand cushion drainage technology,and it is persuasive.