Abstract: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.