箱筒型基础防波堤基础筒土压力数值模拟研究*

通过将波浪荷载作用下箱筒型基础防波堤问题简化为平面应变问题,利用有限元数值模拟,分析在波浪荷载作用下防波堤基础筒壁的土压力分布和发展变化情况。数值计算表明:波浪荷载作用下港侧基础筒外土压力有显著增长,海侧基础筒外土压力有显著降低,是影响防波堤稳定的重要因素。中间隔墙内土压力变化微小,土体与防波堤位移大致相同。海侧基础筒港侧内墙和港侧基础筒靠海一侧内墙上土压力分别发生一定程度的降低和一定程度的增长。同时分析了用于稳定性简化计算的极限状态下各路径上的土压力近似分布。

Numerical study on earth pressure on foundation bucket of bucket foundation breakwater

Earth pressure distribution and variation on foundation bucket of bucket foundation breakwater were simplified to the plain strain condition and studied by FEM. The numerical investigation shows that the earth pressure on the harbor side surface outside the harbor ward side bucket increases significantly, however,earth pressure on surface outside the sea ward side bucket decreased significantly, they affected the stability of breakwater notably. In the middle of the partition, earth pressure changed invisibly, displacement of breakwater and soil was likely the same. Harbor ward inner wall of seaward bucket decreased and sea ward inner wall of harbor ward bucket increased to a certain extent. Then earth pressure distribution on each wall under limit stated was analyzed for simplified stability analysis.