砂桩加固护岸稳定性有限元分析

为了研究护岸的潜在破坏因素对其稳定性的影响,利用有限元软件对采用砂桩加固后的护岸平面模拟,进行稳定性分析.通过不同水位工况的计算,分析得到在极端低水位情况下护岸最容易发生破坏.加固前,护岸在极端低水位时,基床下的淤泥质粘土层形成了连续的弧形塑性应变区,是造成护岸滑移破坏的诱因;加固后,砂桩取代粘土后构成复合地基,提高了土体的抗剪能力和承载力,阻止了连续塑性变形的形成,护岸稳定性得到提高.砂桩加固技术在软土地基处理中作用明显,为港口工程设计建造提供了有益的参考.

Stability analysis of sand pile strengthened dock slope protection

In order to study the effect of latency factor on the dock slope protection, a two-dimension finite element analysis model of dock slope protection between two docks was built. The calculation result shows that the lowest water level is the most dangerous water level, that the formation of plastic strain continuum is the cause of failure,the stability of the new-building is improved after the strengthening, and that there is no continum strain during the leading. The effect of the sand pile is obvious. This method can be applied to other port engineering projects.