Large Dredging Soil Filling Bag Technology Engineering Experimental Study

Coastal levee construction is the important content of port engineering construction, and the sea land building, the important way to solve the problems of shortage of land resources. Harbor construction, the sea land building engineering soil will produce large amounts of dredging and reclamation of mud, such as can use local such as embankment filling and soil resources, can greatly reduce the construction cost.Lianyungang port 300000 tons of waterway engineering construction of seawall needs a lot of sand and gravel materials, but the application of resources shortage in the region, application of resources required for embankment engineering is difficult to meet the requirements, and produced a large number of dredging in waterway dredging engineering of the construction of the soil was left. System research in the key technology of dredged soil as embankment materials, can solve the region due to shortage of resources and environment restriction of embankment material shortage problem.Large dredging soil filling bag after sedimentary filling construction, drainage and consolidation three stages to achieve the strength of the corresponding. Large dredging soil drainage sedimentary stage is filling packing bags from mud to have a certain strength of the soil and the process of soil skeleton, the duration of this stage length determines the construction of two layers of bags, the minimum time interval, determine the construction efficiency and the feasibility of the technology solutions.Through indoor test analysis of large dredging soil drainage in packing bag change mechanism of the deposition process, when the filling soil clay content is more than 10% of cases, liquidity and in ensuring that filling soil can be on the premise of sex, reduce the filling soil initial moisture content, and additional load on mud filling bag to accelerate the consolidation, still can ensure the stability of the packing bag at the end of the filling, meet the demand of practical engineering, when filling the clay content of the soil is more than 30%, the maximum precipitation rate is small, the duration of the precipitation will be a long, is not conducive to engineering construction, therefore, of the filling soil clay content should be less than 30%. On the basis of indoor test, build large dredging soil filling bag of the mathematical model of drainage consolidation, analyze the packing bag of drainage sedimentary process. Finally, through the practical engineering application of the test section, the construction after the packing bag of body form of body structural integrity, stability, quality of body in good condition, filling the bag body is not caused by insufficient strength destruction, dam body foundation stability safety. Fully proved with big bag filling technology replacing the ripped-rock embankment scheme scientific and feasible. The technology could be used to coast in our country, especially in silt soil area embankment technology popularization and application to provide the necessary technical support.