空箱对某深厚软土地基水闸翼墙及桩基础位移的影响

摘要

In soft soil area, the large displacement usually occurs between the sluice pier and the wing, which results in seal failure and endangers the sluice’ s safe operation. Thus, in this paper, the whole sluice model was established with finite element method, and for the soil body, using the Drucker-Prager constitutive model considering soil body creep law. Thus, the reason of the displacement and the influence of connecting empty container in gate side on wings and pile foundation were explored. The results indicate that the groundsill linking empty container transition sluice and sea wall has improved the stress conditions of the pile foundation and effectively controlled displacement of the wing. Further, a reasonable empty container size can not only effectively control displacement, but also avoid project investment waste due to excessive size.%针对软土地区水闸边墩与翼墙间易产生过大变位，导致止水失效并危及水闸运行安全的问题，采用有限元方法建立温州某深厚软土地基上水闸整体模型，土体采用Drucker-Prager本构模型并考虑土体蠕变法则，研究变位产生的原因以及闸侧连接空箱对翼墙及桩基础位移的影响。结果表明，采用连接空箱过渡水闸与堤防之间的地基，改善了水闸桩基础的受力，有效控制了翼墙的位移；合理的空箱尺寸不仅可以有效抑制翼墙与闸室间变形缝的开展，并且可以避免因空箱设置过大而造成的工程投资浪费。