洋流作用下悬浮隧道动力学行为试验研究

Model Experiment Research on Dynamic Behaviour of Submerged Floating Tunnel under Current Effect

本研究根据相似准则和试验条件设计试验模型。在试验模拟的1节悬浮隧道管段上分别布置2组和3组锚索支撑，测试在不同流速条件下，悬浮隧道管体结构的环向应变、轴向应变及张力腿锚索的轴力。根据试验结果，初步分析悬浮隧道应力的空间分布特征和张力腿的轴力情况；给出在相同环境条件下，张力腿锚索数量对结构应力的影响、洋流速度对悬浮隧道管段结构变形和张力腿轴力的影响关系等。

The experiment model rightly was designed according to the similarity criterion and the experiment conditions. One segment submerged floating tunnel tube simulated for the test was supported by two set of anchors support or by three set of anchors. The submerged floating tunnel tube structure＇s annular strain, axial strain and the axial force of the tension leg anchor under different current velocity conditions were tested. Based on the model experiment result, the submerged floating tunnel＇s spatial stress distribution characteristic and the tension leg＇s axial stress condition were initially analyzed. And the influence of the tension leg＇s quantity on the structural stress, the influence of the current velocity on the submerged floating tunnel structural deformation and the tension leg＇s axial stress under the same circumstance were also pointed out.