Automatically filling and draining anti-collision device for tapered bridge pier

Abstract

The invention discloses an automatically filling and draining anti-collision device for a tapered bridge pier. The anti-collision device comprises a front pontoon, a back pontoon and a telescopic device, wherein both the front pontoon and the back pontoon comprise upper and lower pontoon bodies, and the lower pontoon body is provided with an airtight body with a certain volume; the upper pontoon body is provided with an airtight body with a certain volume, and a water inlet hole is formed in the outer wall of each pontoon and is communicated with the non-airtight space of the upper pontoon; and one end of a metal chain of the telescopic device is fixedly arranged on the front pontoon, and the other end of the metal chain of the telescopic device is connected with a balance lifting block across a pulley device arranged on the back pontoon. The front and back parts of the pontoons are flexibly connected by the metal chain and the lifting block, so that the device can automatically adapt to changes in the bridge pier section. The whole anti-collision device slides on the surface of the bridge pier, can not only move at multiple degrees of freedom, but also effectively improve the reliability of structure movement after the ship collision accident happens. Even if the whole pontoons are submerged in the water, the increased buoyancy is only a surplus buoyancy part, thus being favorable for protecting bridges.

Description

technical field [0001] The invention relates to the improvement of the anti-collision technology of bridge piers, in particular to an anti-collision device of variable cross-section bridge piers that can automatically fill and drain, and belongs to the technical field of bridge protection. [0002] Background technique [0003] In order to avoid the collision between ships or floating objects on the water and the piers, anti-collision protection measures have been taken on some piers. The most common anti-collision protection measure is the buoyant box structure, which is set on the pier and can rise and fall with the water level to adapt to the change of the water level. Under the action of water flow, the upstream side of the inner wall of the pontoon will always be in contact with the pier. In order to minimize the resistance caused by this contact to the lifting of the pontoon, the current common practice is to install rollers on the inside of the pontoon to make the di...

AI Technical Summary

Problems solved by technology

Since the current pontoon structure generally uses rollers in contact with the pier, special structures such as telescopic guides and telescopic balance devices are added between the rollers and the inner wall of the pontoon based on self-adaptive needs, so that the rollers can slide up and down with the pier. Open or close, this structural setting not only makes the floating tank complex as a whole, but also increases the cost of anti-collision protection. At the same time, it is more difficult to guarantee the reliability of operation. Once damaged, the later maintenance will be more difficult and costly.

[0005] There is also a potential safety hazard in the existing pontoon. Since the maximum floating position of the pontoon is the position where the upper surface of the pontoon is against the lower surface of the bridge, once a rare flood occurs and the flood overflows the bridge deck, the pontoon will All submerged in the water species, compared with the case where the normal water level buoyancy tank is partially submerged in the water species, the buoyancy of the buoyancy tank is greatly increased (maybe about 3 times the usual), under the joint action of the water flow, the buoyancy tank at this time It will generate a very large impact force on the bridge deck, thus posing a threat to the safety of the bridge deck

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