遮帘式板桩码头变形机制有限元分析

Finite Element Analysis on Deformation Mechanism of Sheet-pile Quay Wall with Barrier Piles

遮帘桩作为新型的支护结构作用在板桩码头结构上,造成常规板桩码头结构发生变形,现有的理论计算方法还不能完全反映其变形机制。借助ABAQUS通用有限元软件,结合工程实例,进行了二维及三维数值计算,计算结果表明:①对比数值计算结果与原型观测试验,模拟的结构变形与原型观测结果相仿,前墙上水平位移沿深度方向呈抛物线变化,而遮帘桩、锚碇墙上水平位移沿深度方向大致呈线性分布,竖向沉降与原型观测结果相似;②比较三维模型中间桩、边桩断面和原型观测上水平位移,前墙受遮帘桩影响,存在明显的遮帘效应。

Barrier pile is a new supporting structure for sheet pile quay wall. It causes deformation of the quay wall and the deformation mechanism cannot be entirely revealed by existing theories or calculation methods. We carried out 2-D and 3-D numerical computation on some engineering practices by using ABAQUS and found that：（ 1） the simulated structural deformation is consistent with that from prototype observation. The variation of horizontal deformation of the front wall is parabolic along depth,whereas the horizontal deformations of the barrier pile and the anchor wall are linear. Simulated vertical settlement is similar with prototype observation.（ 2） By comparing the horizontal deformation of middle pile and side-pile section in the 3-D model with that in the prototype observation,we found that the front wall was affected by barrier piles,showing obvious covered effect.