The anti-bridge expansion joint installation that shakes off of a kind of modulus type
The utility model belongs to bridge expanssion joint technical field, is specially a kind of modulus type expansion gap device with antidetonation, girder falling effect.
In existing bridge expansion joint installation, modulus type bridge expansion joint installation be the most generally, a kind of preferably, be particularly suited for being applied in large bridge shrinkage joint.Along with the fast development of China Higher level highway construction cause, the growing up of bridge obtains breakthrough, and this will have bridge expansion joint installation rational in infrastructure, big displacement quantity to adapt to the needs of this development with regard to requiring.Along with being on the increase of bridge number, the traffic safety and riding comfort of expansion gap device progresses into people's the visual field.The bridge expansion joint installation larger expansion gap device of variation and beam body due to beam body in being subject to intense impact or earthquake all can be subject to mortal injury, therefore be necessary to research and develop and a kind ofly both can have met bridge being subject to when intense impact or earthquake occur reaching certain damping, energy dissipating object, can also prevent the bridge modulus type expansion joint device of anti-seismic bridge that the excessive expansion gap device causing in beam-ends gap comes off when earthquake.
Summary of the invention
The utility model cannot shock-resistant and energy-dissipating for solving existing modulus type expansion gap device, the technical problem of girder falling, has designed that a kind of modulus type is anti-shakes off bridge expansion joint installation, by energy-absorbing position limiting structure is set, reaches the object of buffering, protection and girder falling.
For reaching goal of the invention, the technical solution adopted in the utility model is: the anti-bridge expansion joint installation that shakes off of a kind of modulus type, structure comprises that symmetry is positioned at the side bar moving on control casing, be arranged on the central sill on support stringer and between two side bars, support stringer by means of bearing and compressing support spacing move control casing among, its key is: at support stringer and move control and be provided with energy-absorbing position limiting structure between casing, this structure comprises the antidetonation block rubber that is arranged on support stringer two ends, and be positioned at move control casing in, position limiting structure endface position and that be positioned at support stringer one or both sides.
Further, the cross section of described support stringer is I-shaped or rectangle.
Further, described antidetonation block rubber comprises the block rubber that is fixed on the junction plate of support stringer end face and is fixed on junction plate side.
Further, described position limiting structure comprises limiting plate and is arranged on the free-ended buffer layer of limiting plate.
Further, described limiting plate is Z-shaped or L shaped or U-shaped.
The utility model beneficial effect is: antidetonation block rubber when moving control casing, limit assembly and antidetonation block rubber and can make zero to shrinkage joint respectively and be greater than displacement, can play the effect of good buffering, energy-absorbing, damping; When displacement is excessive, antidetonation block rubber forms spacing cooperation with limit assembly, prevents coming off of expansion gap device.
Below in conjunction with accompanying drawing, the utility model is elaborated.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation that limit assembly coordinates with antidetonation block rubber.
In accompanying drawing, the 1st, move control casing, the 2nd, side bar, the 3rd, central sill, the 4th, support stringer, the 5th, bearing, the 6th, compressing support, the 7th, antidetonation block rubber, 7-1 is junction plate, 7-2 is block rubber, the 8th, limit assembly, 8-1 is limiting plate, 8-2 is buffer layer.
The specific embodiment
Referring to accompanying drawing 1, the anti-bridge expansion joint installation that shakes off of a kind of modulus type, structure comprises that symmetry is positioned at the side bar 2 moving on control casing 1, be arranged on the central sill 3 on support stringer 4 and between two side bars 2, support stringer 4 by means of bearing 5 and compressing support 6 spacing move control casing 1 among, key is: at support stringer 4 and move control and be provided with energy-absorbing position limiting structure between casing 1, this structure comprises the antidetonation block rubber 7 that is arranged on support stringer 4 two ends, and be positioned at move control casing 1 in, limit assembly 8 endface position and that be positioned at support stringer 4 one or both sides.
The cross section of described support stringer 4 is I-shaped or rectangle.Support stringer 4 I-shaped or rectangle forms position limiting structure with limiting plate 8-1 after being convenient to install junction plate 7-1.
Described antidetonation block rubber 7 comprises the block rubber 7-2 that is fixed on the junction plate 7-1 of support stringer 4 end faces and is fixed on junction plate 7-1 side.Junction plate 7-1 fixes by the end face of bolt or welding and support stringer 4.Block rubber 7-2 is fixed on junction plate 7-1 by sulfuration process.
Described limit assembly 8 comprises limiting plate 8-1 and is arranged on the free-ended buffer layer 8-2 of limiting plate 8-1.Limiting plate 8-1 welding or bolt are moving control casing 1 internal end surface.Buffer layer 8-2 is fixed on the free end of limiting plate 8-1 by sulfuration process.
Described limiting plate 8-1 is Z-shaped or L shaped or U-shaped.
The utility model is in the specific implementation: referring to attached Fig. 1 and 2; antidetonation block rubber 7 is fixed on the two ends of work type or rectangle support stringer 4; when make zero in earthquake generation shrinkage joint; block rubber 7-2 with move control casing 1 and start effect, by buffering, energy-absorbing, cushioning effect, well protect the beam body of expansion gap device itself and bridge.
Limit assembly 8 is fixed on and is moved in control casing 1 internal end surface by modes such as welding, bolts.When in seismic process, gap, shrinkage joint is greater than the displacement of expansion gap device; limit assembly 8 starts effect with junction plate 7-1; can well play buffering, energy-absorbing, damping and gap is fixed on maximum displacement and can well be protected expansion gap device and beam body, and preventing coming off of expansion gap device.
A kind of modulus type provided by the utility model prevents that shaking off bridge expansion joint installation can, for displacement on the shrinkage joint of 160mm----2000mm, can be used for the Liang Tishang such as concrete beam, girder steel.Antidetonation block rubber 7 in this expansion gap device and limit assembly 8 adopt the modes such as welding or bolt to be individually fixed in support stringer 4 and move in control casing 1, do not increase the size of moving control casing 1.Thereby antidetonation block rubber 7 meets earthquake while impelling bridge to extend better buffering, energy dissipating, damping protection expansion gap device and beam body; Thereby limit assembly 8 meets earthquake while impelling bridge to shorten better buffering, energy dissipating, damping protection expansion gap device and beam body.Bed rearrangement bridge adopt this utility model can well protect integral bridge with earthquake link, displacement, avoid bridge damage, prevent that expansion gap device from coming off.