Pier collision preventing and energy dissipation device capable of ascending and descending automatically

Abstract

A pier collision preventing and energy dissipation device capable of ascending and descending automatically comprises a pier and is characterized by being composed of an annular protection sleeve, connecting springs, sliding blocks and guide rails. The guide rails are arranged on the outer wall of the pier, the axial direction of the guide rails is parallel to the axial direction of the pier, and the guide rails are distributed in the circumferential direction of the pier. The sliding blocks and the guide rails are in sliding connection, and the sliding blocks correspond to the guide rails one to one. The annular protection sleeve is connected outside the pier in a sleeved mode, and a clearance is reserved between the annular protection sleeve and the pier. One end of each connecting spring is connected with the inner circumferential face of the annular protection sleeve, the other ends of the connecting springs are connected with the sliding blocks, the connecting springs correspond to the sliding blocks one to one, and the connecting springs are distributed in the circumferential direction of the annular protection sleeve. The pier collision preventing and energy dissipation device has the advantages that the protection device can move along with the variation of the water level, the structural utilization rate of the protection device is greatly improved, the protection device is prevented from being arranged on the whole pier in the length direction, construction cost is low, and the protection effect is good.

Description

technical field [0001] The invention relates to a protection technology for buildings on water, in particular to an anti-collision and energy dissipation device for bridge piers that can be automatically raised and lowered. Background technique [0002] Accidents where ships or drifting objects collide with bridge piers pose a great threat to the safety of bridge structures and navigation safety; in view of such accidents, the traditional protective measures are either to avoid making bridge piers in navigable waters, or to take restrictive measures for navigable ships, and some even increase The stiffness of the pier itself is used to prevent collision damage. These protective measures increase the requirements for navigable ships and the cost of bridge construction. [0003] In recent years, there have been various types of protection settings at home and abroad, such as a bridge anti-collision fender pile array disclosed in Chinese Patent No. 200610155224. This scheme...

AI Technical Summary

Problems solved by technology

[0002] Accidents where ships or drifting objects collide with bridge piers pose a great threat to the safety of bridge structures and navigation safety; in view of such accidents, the traditional protective measures are either to avoid making bridge piers in navigable waters, or to take restrictive measures for navigable ships, and some even increase The stiffness of the piers themselves is used to prevent collision damage. These protective measures increase the requirements for navigable ships and the cost of bridge construction.

[0003] In recent years, there have been various types of protection settings at home and abroad, such as a bridge anti-collision fender pile array disclosed in Chinese Patent No. 200610155224. This scheme relies on the buffer deformation of a single rubber fender to play a protective role. The effect is relatively limited, and it can effectively protect small ships or small drifting objects, but it cannot absorb the impact force well for large ships with a tonnage of more than 100 tons, and the pier still cannot avoid damage, and because the rubber fender The position of the pier is relatively fixed. For waters where the water level changes frequently, more rubber fenders need to be arranged to cover the surface of the pier. The installation and layout are difficult, and the production and maintenance costs are also increased.

Commonly used anti-collision devices include pile groups, thin-shell sand cofferdams, artificial islands, etc. These methods are generally only suitable for shallow water and good geological conditions. Although once and for all, they will affect the channel and Often give up because the cost is too high or the conditions are not met

There are also sets of box energy dissipation facilities, which use the plastic deformation and damage of the box to dissipate energy, but they usually can only withstand a single impact, and it is difficult to repair after the impact. The protection of the hull is not considered during the collision, and the maintenance cost is high. The collision position of the pier is not considered when the water level rises and falls, which increases the cost of collision protection

In recent years, there has been an automatic lifting and anti-collision device independent of the bridge pier, which provides sufficient protection for the protected pier, but requires a new anti-collision structure, which requires a large investment, and requires a new independent reinforced concrete structure, and the construction period is long

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