沉管隧道接头刚度模型研究

Model for stiffness of joints of immersed tube tunnel

沉管隧道接头是沉管隧道的薄弱部位,对变形非常敏感。沉管隧道接头刚度包括轴向刚度n k,切向刚度s k和弯曲刚度k?,是沉管隧道结构计算中的重要参数。依据沉管隧道接头的构造特征,分析了各部件的作用机理,利用端钢壳、GINA止水带、OMEGA止水带和剪力键橡胶垫板的应力–变形关系,在接头几何变形协调的基础上,对沉管隧道接头进行受力分析,建立了沉管隧道接头刚度计算模型。有助于对沉管隧道接头工作机理的理解。

The immersed tube tunnel is generally connected by segments through the joints, which are the weakest part and sensitive to deformation. The design and calculation of the Joints are key issues for the construction of the immersed tube tunnel. The joint stiffness n k, s k and θk are the important parameters for the design. According to the structural characteristics of the joints of the immersed tube tunnel, the mechanism of various components is analyzed by using the stress-displacement relations of end steel shell, GINA gasket, OMEGA gasket and rubber padding. A model for the joint stiffness is established based on the static equilibrium of the joints. It is helpful for better understanding of the mechanism of the joints of the immersed tube stunner.