拱形自浮式水上升降防撞装置浮性与稳性研究

拱形自浮式水上升降防撞装置是由重庆交通大学发明的一种新型桥梁防撞装置,它主要由导向井、防撞带和浮筒三大部分组成;其中防撞带和浮筒都是钢结构,导向井采用钢筋混凝土结构,整个结构长达300多米。对于如此庞大的水上自浮式装置而言,该装置在水上的浮态与稳态是保持防撞装置自身运行可靠、受力合理的关键。为此通过模型试验验证防撞设施浮性与稳性。试验结果表明在三种典型水位流量工况下,防撞设施的浮态与静水条件下大致相同。当船舶撞击防撞带,使防撞带破损进水,防撞带的水上浮出高度仍可保证在1 m以上,防撞设施仍具有较好的浮性。在内河中的波浪,以及船行波作用下,防撞带在拱顶处、距拱顶1/4处,不会产生的较大竖向晃动,保持良好的稳性。

Study on the Buoyancy and Stability of the Arch Self-floating Lifting Water Upper Anti-collision Device

Arch self-floating lifting water upper anti-collision device invented by Chongqing Jiaotong University, the bridge anti-collision device is composed of three parts, It is a new type of anti-collision device, made of guide well, collision zone and buoy. The collision zone and buoy is steel construction, the whole structure is more than 300 meters long. For such a large water self-floating type device, the device in the floating state and steady state water is to keep its key anti-collision device reliable operation, reasonable stress, the design verification of the partial model of floating anti-collision facilities and stability, the test results show that the three kinds of typical water flow under the condition of collision avoidance facilities of floatation and hydrostatic conditions are approximately the same, when the collision with the ship collision, collision with a damaged, collision with water to the height can be ensured in more than 1meter, anti-collision device still has good floatability. Under the action of wave and ship traveling wave in the inland river, the large vertical sway of the collision zone in the vault and the vault 1/4 will not be maintained.