Numerical Simulation And Engineering Application Of Dredging And Reclamation Silt Forming

In the course of port project construction,in some special areas,it is difficult to quickly form the cofferdam protection needed for dredging and filling due to the limitation of materials(stone,cement,geotextile,surface block prefabricated materials,etc.).In the condition of no cofferdam protection,the construction will be affected by many comprehensive environments such as hydrology and meteorology,which may cause serious loss of sand,which will lead to water pollution and serious consequences in the sea area,and then affect the overall construction of the project.In this paper,aiming at the conditions,engineering characteristics,safety and environmental protection and progress of dredging and filling construction under the condition of unprotected cofferdam,the paper studies the formation of sand-filling sand in the construction of dredger fill construction,and develops a reasonable construction method.The concrete contents are as follows :The finite element model of dredging and filling is established,and the dynamic shaping of dredging and filling(during construction period)and the hydrological influence(stable period)of sand pile are simulated.Through the comparison and analysis of the simulation results under different parameters and the previous construction experience,the rationality of the calculation model and the selection of related parameters is ensured.Through the numerical simulation of a certain filling project,the formation of sand pile during construction period and the sediment loss and collapse in stable period are analyzed,and compared with the measured data in the later stage of the project.The results show that the structure shape and thickness of dredging and filling during construction are in high agreement with the simulated results,and the displacement and direction of the sand pile are in good agreement with the simulation results.In the project implementation stage,through the analysis and Simulation of multi working conditions,the influence of subjective factors is eliminated in the construction scheme comparison,defects(pre construction,construction difficulties,on-site execution,etc.)and the analysis of site construction,optimizing the working procedure of dredging and dredging,reducing the project construction cycle and implementing the risk,effectively reducing the construction risk and management.Reasonable cost,effectively protect the rationality,effectiveness and scientificity of construction.The research results of this paper find a new verification method for the decision of filling construction scheme under complex working conditions.