Structural Design and Stability Analysis of Steel Sheet Pile Cofferdam
Steel sheet pile cofferdam are suitable for deep water,mud flat and other complex geological.The stability of steel sheet pile cofferdam during the piling process and working process was studied in this work.The fluid dynamics of the piling process in a mud with different condition was studied through Fluent software and was calculated the dynamic load.The stability of steel sheet pile was evaluated.A method of combining fluid dynamics analysis and solid mechanics analysis to study the stability of piling process was proposed.The stability of cofferdam under external pressure was analyzed by ANSYS software.The results show that dynamic load of non-Newtonian fluid is influenced by the power law index,consistency coefficient and static load,the consistency coefficient is linearly related to the fluid viscosity,the power law index reflects the non-Newtonian nature of the fluid,and different loads will cause the change in fluid viscosity on the other hand.Thus,it is needs to consider the buckling analysis result,the piling time and the piling equipment together to select the appropriate piling force.The critical buckling stress of the cofferdam obtained by the eigenvalue buckling analysis and the non-linear buckling analysis present the closer result.The non-linear buckling analysis takes the non-linearity of the material into account and includes the plastic deformation component,so the critical instability stress is greater.
cofferdamnon-Newtonian fluidpower law indexconsistency coefficientbuckling analysis
万方数据
维普
