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倒虹吸结构作为我国南水北调工程中重要的输水结构物之一,不可避免地会穿越桥梁等地上结构物,桥梁荷载会通过基础桥桩对相邻倒虹吸结构产生影响。为了研究分析这种影响规律,利用ADINA有限元软件建立倒虹吸结构-土体-跨线桥三维空间模型。通过计算分析可知,桥梁活载的影响可以忽略不计,在未考虑地震作用时,桥梁对相邻倒虹吸结构位移变形影响较小,拉应力影响值得关注,考虑地震作用后变形及应力影响均值得工程人员关注,尤其是扭转变形。
Inverted siphon structure, as one of the most important water conveyance structures in South-to-North Water Diversion Project in our country, will inevitably cross the bridge and other ground structures, and the bridge load will affect the adjacent inverted siphon structure through the foundation bridge pile. In order to study and analyze this influence law, the 3D model of inverted siphon structure-soil-flyover bridge was established by using ADINA finite element software. Through calculation and analysis, it can be seen that the influence of bridge live load is negligible. When the effect of earthquake is not considered, the bridge has less influence on the displacement and displacement of adjacent inverted siphon structure. The influence of tensile stress is worth paying attention to. Engineering personnel concerned, especially to reverse the deformation.