坞式结构有限元仿真模拟及施工过程对底板受力影响分析

Finite element simulation of a castle structure and influence of the construction procedure on the floor stress

大型船闸底板表面经常会产生顺水流方向的纵向裂缝,常规设计方法无法解释.引入土体渗流固结理论,建立模拟船闸施工过程的有限元仿真模型,对比常规设计方法计算结果,从另一角度进一步分析底板开裂原因,认为常规设计方法是一种瞬态整体分析方法,既没有考虑船闸施工过程,也没有考虑土体沉降过程时间特性,对底板上表面应力计算存在较大偏差,建议设计时采用仿真方法进行计算分析.

The reason of longitudinal cracks on the lock＇s surface cannot be explained by conven- tional design methods. We brought the soil consolidation theory into the analysis of floor＇s stress, established a FEM simulation model according to the construction procedure of a lock, and further discussed the reason by comparing the results with that gained by the conventional design method. Finally we draw a conclusion that the conventional design method is a transient entire method that neither considers the locks＇ construction procedure nor considers time characteristics of the soil settling and leads to a big deviation of the floor＇s surface stress, and put forward a proposal that de- signer should apply the simulation method to compute and analyze the floor stress.