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大型沉管隧道管段的沉放是沉管隧道施工中的关键环节之一.为了解沉管隧道管段沉放过程中的运动特性,对双驳船施工沉放的沉管隧道管段进行了频域计算分析.基于线性波理论和三维分布源法,计算得到波浪作用下沉管管段沉放过程中的波浪荷载及频域运动响应.计算中假定驳船本身的运动较小,忽略了驳船的运动对管段运动响应的影响,缆绳作用力由静力学方法计算.计算结果表明,沉管受到的波浪荷载在靠近水面的位置较大,并随着沉管沉放深度的增加而减小;随着波浪周期的增大,沉管受到的波浪荷载先增大而后减小;沉管的运动响应一般在离水面近的位置较大,并随着沉放深度的增加而减小。
In order to understand the movement characteristics of immersed tube tunnel during the sinking process, the immersion of large immersed tube tunnel section is one of the key steps in immersed tube tunnel construction. Based on the linear wave theory and the three-dimensional distribution source method, the wave loads and frequency-domain responses during the submerged pipe section under wave action are calculated. The calculation assumes that the barge itself has a small movement, neglecting the barge’s movement, The response of the cable is calculated by static method.The results show that the wave load on the immersed tube is larger near the water surface and decreases with the sinking depth of the immersed tube. The wave load on immersed tube firstly increases and then decreases; the response of immersed tube is generally larger near the water surface and decreases with the increase of sinking depth.