Simulation of Anti-flood Spiral Pile-driven Process Based on ALE Algorithm

Anti-flood Spiral pile driving system which consists of spiral pile and spiral pile driver is developed to solve the problems of the traditional woodiness pile driving system in flood preventions. With the gradual application of spiral pile in flood preventions, better spiral pile is needed to design and a more stable driver system is required. In this paper, ANSYS / LS_DYNA is used to build up spiral pile-soil finite element model and simulate the pile-driven process with ALE algorithm. Considering existent computer performances, some strategies are taken to reduce CPU time, including part switch between rigid and deformable at some stage in the calculation. Angle velocity and displacement-velocity are applied in the calculation. According to the simulation results, the minimum moment and the minimum theoretical power consumption required during the pile-driven process are 491.57Nm and 1.208kw. The spiral pile driving system can be optimized on the basis of this reference.