The buffer of using in the pier anticollision structure
Technical field
The utility model belongs to on-water bridge anti-collision technique field, relates to the buffer of using in the pier anticollision structure, particularly can reduce the bridge pier extent of damage by buffering energy-absorbing, has the function of protection bridge pier.
Background technology
The bridge construction in river, river, lake, sea of jumping in the world wide is carried out rapidly, and the construction of large bridge can be alleviated traffic pressure, promote water route, land communications, but for water craft, bridge but is a cultural obstacle.Because all many-sided factors such as natural environment, navigation environment, boats and ships situation, Ship Controling person and managers, the serious accident that causes boats and ships and bridge to bump worldwide all takes place every year.According to statistics, in 1960~1993 years 33 years, the whole world has reached 29 because of the large bridge that the ship bump causes damaging, and wherein the U.S. is 15, and death toll is 321 people; At home, the accident of navigating ship bump bridge exists for a long time at large, and operation has caused very big harm to bridge security, especially causes bridge floor to come off in the river because of the ship bump at Jiujiang, Guangzhou in 2007 cable stayed bridge, has caused huge casualties.Therefore, become everybody common recognition to there being the current bridge of boats and ships that anti-collision facility is set.
The structure of bridge-collision-avoidance generally adopts buffer structure, the energy that ship bump back is produced absorbs part energy by elastomeric material, but because ship is very heavy, the energy of bump will be far longer than the energy of elastomeric material distortion back buffering, therefore the effect of playing in the actual collision process is not clearly, in addition still can cause the bridge pier crack, structure such as bridge caves in.Therefore, in art technology, also need the buffer structure in the bridge-collision-avoidance structure is further improved, really can play a protective role bridge.
Summary of the invention
The purpose of this utility model is in order to solve after ship bump pier anticollision structure; reduce the extent of damage to bridge pier as far as possible; and then the technical problem of protection bridge pier; designed the buffer of using in a kind of pier anticollision structure; setting by the piston type buffer gear; after collision takes place; buffer gear can make the energy compression piston bar of bump; the reaction force of piston rod is resisted the energy of bump by air in the piston; reach the purpose of buffering at last by the form of slow venting, effectively protect bridge pier.
The utility model for realizing the technical scheme that goal of the invention adopts is, the buffer of using in the pier anticollision structure, be positioned between the substrate and the outermost crashproof girder steel of anti-collision structure of bridge pier periphery, key is: the structure of described buffer is: piston sleeve and piston rod are positioned at respectively on substrate and the crashproof girder steel, form the piston type steel bushing with free sliding degree.
Further be improved to: the external surface at the piston type steel bushing also is with first spring; Between the termination of the tube end and the piston rod of piston sleeve, also be provided with second spring.
The anti-collision structure of the utility model design is a principle of having utilized buffer piston; meeting extrusion piston bar after anti-collision structure produces deformation; and then the gas in the extrusion piston sleeve; the process that gas slowly discharges is as the buffer protection layer; increasing by first spring on the piston sleeve again and in piston sleeve, increasing by second spring in addition; can further increase the time of ship bump bridge pier, reduce to clash into the energy of bridge pier as much as possible, thereby reach the purpose of protection bridge pier.
The beneficial effects of the utility model are, the buffer gear of being made up of piston cylinder operator is good, and the protective effect of first spring makes buffering effect obvious, have further reduced the extent of damage of bridge pier.
Below in conjunction with accompanying drawing the utility model is elaborated.
Description of drawings
Fig. 1 is the specific embodiment structure chart of the utility model buffer.
Fig. 2 is another example structure figure of the utility model buffer.
In the accompanying drawing, the 1st, substrate, the 2nd, piston type steel bushing, 2-1 are piston sleeves, 2-2 is a piston rod, 2-3 is second spring, and 2-4 is a shaft sleeve, and 2-5 is a multi-directional ball, and 2-6 is the convex surface briquetting, 2-7 is the yielding rubber cover, the 3rd, and crashproof girder steel, 4 is first springs, the 5th, bridge pier.
The specific embodiment
Referring to Fig. 1, the buffer of using in the pier anticollision structure, be positioned between the substrate 1 and the outermost crashproof girder steel 3 of anti-collision structure of bridge pier 5 peripheries, key is: the structure of described buffer is: piston sleeve 2-1 and piston rod 2-2 are positioned at respectively on substrate 1 and the crashproof girder steel 3, form the piston type steel bushing 2 with free sliding degree.
The anti-collision structure of the utility model design is a principle of having utilized buffer piston; crashproof girder steel 3 is as the first floor protection structure of bridge pier; meeting extrusion piston bar 2-2 after the generation deformation, and then the gas among the extrusion piston sleeve 2-1, the process that gas slowly discharges is as second layer buffer protection layer.
External surface at piston type steel bushing 2 also is with first spring 4, further makes the time that increases ship bump bridge pier 5.
Between the termination of the tube end and the piston rod 2-2 of piston sleeve 2-1, also be provided with the second spring 2-3.Also can increase the elastic buffer ability between piston sleeve 2-1 and the piston rod 2-2.
Also be provided with shaft sleeve 2-4 in piston type steel bushing 2, piston sleeve 2-1 and piston rod 2-2 form the revolute pair of horizontal direction by shaft sleeve 2-4.When ship's side is clashed into, can not relatively rotate between piston sleeve 2-1 and the piston rod 2-2, then can cause the junction distortion of piston sleeve 2-1 and piston rod 2-2, thereby can't carry out normal piston type motion, therefore can provide certain rotational freedom after shaft sleeve 2-4 being set, when piston rod 2-2 has less rotation, still can in piston sleeve 2-1, slide.
Referring to Fig. 2, the end of piston rod 2-2 also is provided with the convex surface briquetting 2-6 supporting with the second spring 2-3, and piston rod 2-2 and convex surface briquetting 2-6 are hinged by multi-directional ball 2-5.
Also be coated with yielding rubber cover 2-7 in the junction of piston rod 2-2 and convex surface briquetting 2-6.
The purpose of the utility model bridge-collision-avoidance facility is to prevent bridge because of the design ability to bear of ship impact force above bridge pier 5, the protection bridge structure safe.By adopting multi-form anti-collision facility, the impact that reduces boats and ships reaches bridge pier 5, perhaps by buffering energy-dissipating and collision-preventing facility, prolongs the collision time of boats and ships, reduces ship impact force, thereby finally protects bridge security.Anti-collision facility need design according to factors such as the type of the speed of the profile of the position of the impact resistance of bridge pier self, bridge pier, bridge pier, current, SEA LEVEL VARIATION situation, navigation boats and ships, impact velocities.Anti-collision facility generally should satisfy following requirement: the boats and ships energy to collision carries out the energy dissipating buffering; The boats and ships that clash under various water level conditions can not directly touch Dun Bi; Anti-collision facility can not influence the navigation in navigation channel, and it is as far as possible little to take the navigation channel scope; Should as far as possible reduce the to open the navigation or air flight damage of boats and ships of the layout of various padded coamings; Anti-collision facility manufacture, installation, maintenance and repairing better economy; Anti-collision facility has good reliability and safety etc.