板桩加固护岸结构有限元分析

摘要

The sheet pile reinforcing revetment is a new-style structure ,which combines the new and old revetments .It is of important reference value for the practical engineering design to investigate the earth pressure distribution under this kind of revetment .The sheet pile reinforcing revetment is analyzed here by adopting the finite element software PLAXIS . The comparative analysis is conducted for the results of earth pressure from finite element simulation ,field measuring and specification calculating .The results show that the old revetment structure could effectively reduce the earth pressure act-ing on the upper part of sheet piles ,while raise the earth pressure acting on the lower part of sheet piles ,which could prevent the sheet piles from“skirting” instability in the end of wall .The new sheet pile reinforcing revetment has many advantages such as simpler structure ,less materials ,lower cost and so on .Based on the results of finite element method , the earth pressure calculating method from specification is optimized by referring the measured data ,which could provide references for the calculation analysis of similar sheet piles .%　　板桩加固护岸结构是一种新老结构结合的护岸新型式，研究板桩在此护岸型式下的土压力分布对实际工程的设计具有重要的参考价值。使用有限元软件PLAXIS对板桩加固护岸结构进行分析，将其计算结果与现场实测、规范计算结果进行了比对分析。结果表明：老护岸结构能有效减小板桩上部土压力，增加板桩下部土压力，防止板桩发生墙底“踢脚”失稳，新型板桩护岸具有结构简单、材料用量小、造价低等优点。在此基础上参考实测数据对规范土压力计算进行了优化，为同类板桩工程计算分析提供参考。