Suspension tunnel with anchor cable foundation: Fid-Bau Portal

Suspension tunnel with anchor cable foundation

WANG SHUSHENG

The suspension tunnel is characterized in that the tunnel comprises the anchor cable foundation, a tunnel pipe joint and a cylinder, the anchor cable foundation comprises an anchor, a cable and a buoyancy frame, the bottom end of the cable is connected with the anchor fixed to the seabed, the top end of the cable is connected with the buoyancy frame, and the buoyancy frame comprises a vertical column; the resultant force of the buoyancy force, the dead weight and the live load borne by the tunnel pipe joint in the vertical direction is F1 in the downward direction, the resultant force of the buoyancy force and the dead weight of the buoyancy frame is F2 in the upward direction, and F2 is larger than F1. The cylinder is located on a tunnel pipe joint, the vertical column extends into the cylinder and can horizontally move within the range limited by the cylinder, and the top of the vertical column supports the cylinder. When an earthquake occurs, vibration absorption and buffering of the tunnel are achieved through shrinkage of the cables, separation of the vertical columns and the cylinders and shaking of the vertical columns in the cylinders. The method has the advantages that the resultant force of the floating tunnel in the vertical direction can be zero, the construction period is short, and the manufacturing cost is low.

本发明公开了一种锚索基础的悬浮隧道，其特征是该隧道包括锚索基础、隧道管节和圆筒，锚索基础包括锚、索和浮力架，索的底端与固定于海底的锚连接，顶端与浮力架连接，浮力架包括铅直柱；隧道管节在铅直方向所受浮力、自重和活载三力的合力为方向向下的F1，浮力架浮力减自重的合力为方向向上的F2，F2大于F1；圆筒位于隧道管节上，铅直柱伸入圆筒内，且能在圆筒限制的范围内作水平运动，铅直柱的顶部托住圆筒；发生地震时，隧道通过索的堆缩、铅直柱与圆筒的脱开和铅直柱在圆筒内晃动，实现吸振缓冲。本发明的优势是：能实现悬浮隧道在铅直方向的合力为零，施工周期短、造价低。

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