CN203334178U - High-reliability bridge expansion joint easy to replace - Google Patents
High-reliability bridge expansion joint easy to replace Download PDFInfo
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- CN203334178U CN203334178U CN2013200049362U CN201320004936U CN203334178U CN 203334178 U CN203334178 U CN 203334178U CN 2013200049362 U CN2013200049362 U CN 2013200049362U CN 201320004936 U CN201320004936 U CN 201320004936U CN 203334178 U CN203334178 U CN 203334178U
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- terminal end
- bare terminal
- expansion joint
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- reliability
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Abstract
A high-reliability bridge expansion joint easy to replace comprises a body, a clamping end and a fixing spandrel beam. The rigidity of the clamping end can be changed, when the expansion joint is installed, the rigidity of the clamping end is low so that the clamping end can conveniently enter a groove of the spandrel beam. When the expansion joint is used, the rigidity of the clamping end is increased, clamping force is increased greatly to prevent falling-off of the expansion joint, and work reliability is greatly improved. When the expansion joint is replaced and detached, the rigidity of the clamping end can be greatly reduced so that the clamping end can be separated from the groove of the spandrel beam easily, and the fact that the bridge expansion joint is easy to construct and replace is truly achieved.
Description
Technical field
The utility model relates to the shrinkage joint between bridge, is applicable to interstructural dynamic seam, plays the effects such as waterproof and dustproof, sealing simultaneously.Be a kind of easy replacing high-reliability bridge expanssion joint specifically, there is high reliability and be convenient for changing characteristic.
Background technology
At present a large amount of shrinkage joint that adopt of China railways bridge are rubber water-proof band structures, and the type shrinkage joint mainly comprises: fixedly side bar, water proof rubber bar and anchor device three parts.Investigation finds that many railways in operation are used all problems such as peeling off, come off of various degrees of rubber fastening band shrinkage joint, cause the anti-drainage performance in shrinkage joint entirely ineffective, engineering practice shows, the build-in structure and installment technique that the waterstop shrinkage joint has is to cause that difficulty of construction strengthens, the caducous immediate cause of rubber strip.
There is at present multiple shrinkage joint to be applied to concrete-bridge, as waterstop, fluid sealant, waterproof roll etc.For example, propose a kind of steel plate water stop band for bridge expansion device in Chinese patent ZL03219803.5, the cross section of its waterstop belt body is continuous many v-shaped structures, and two ends are connected by horizontal edge and beam notch.This kind of waterstop needs welding while installing, complex process, higher, the easy burn into dismounting and change trouble of cost.
Chinese patent ZL200810080073.0 has announced a kind of from condensing waterstop and preparation method thereof, the water-proof wing limit that this waterstop comprises seal ring and is connected as a single entity with it, there is the transition zone that comprises the asphaltic resin composition side up and down on water-proof wing limit, waterstop can be bonded on transition zone securely.And react after touching cast-in-situ concrete, be integrated with layer of concrete, connection more firm.But rubber is because of the problem of aging of self, and the life-span generally is no more than 10 years, much smaller than concrete projected life.Once its damage, Renewal process bothers very much, greatly increases maintenance cost.
Chinese patent ZL03209897.9 has announced a kind of Water stop structure with the bridge expanssion joint that is down " Ω " structure.Be provided with two base plates at its place, shrinkage joint, these waterstop both sides have flange to be coated on base plate respectively.The outside vertical edge of its waterstop flange is thicker than its upper end horizontal edge, can prevent that waterstop from pulling from base plate, and base plate is welded and fixed with the pre-buried dowel of connecting reinforcement and bridge, is convenient to install.But, because waterstop is fixed by turnup structure and base plate, its anti-seepage of water is bad.The pecten of waterstop upside is connected by screw, than corrosion-vulnerable, seeps water, and need often change.Its structure is relatively complicated, changes trouble.
Therefore, be necessary to clamp not strongly for common rubber fastening band shrinkage joint bare terminal end the shortcoming of solid inefficacy and maintain and replace difficulty, design a kind of high reliability, New Type Expansion Joint for convenience detach.
The utility model content
Consider at least one the problems referred to above and completed the utility model, and a purpose of the present utility model is to provide a kind of easy replacing high-reliability bridge expanssion joint, it is characterized in that this shrinkage joint comprises body, stiffness variable bare terminal end and fixing side bar, body and stiffness variable bare terminal end are connected, fixedly the side bar build-in is in the bridge beam end concrete and form holding tank, described bare terminal end is embedded in described holding tank, the sealable opening that described bare terminal end comprises cavity and is communicated with this cavity, be filled with the hardenable packing material that is fluid state in described cavity.
According to the utility model on the other hand, described packing material is resin.
According to the utility model on the other hand, described resin is gas, liquid or solid powder.
According to the utility model on the other hand, be provided with heating wire in described cavity.
Compared with prior art, the both sides of shrinkage joint of the present utility model body respectively have the bare terminal end of a stiffness variable, and each bare terminal end contains a cavity.Therefore the structure of hollow makes bare terminal end rigidity very low, is easy to the shrinkage joint build-in is installed among the holding tank of fixing side bar.Then be full of the packing material that is fluid state in cavity.After some physics or chemical change occur packing material, its rigidity increases, and has higher strength and modulus, so shrinkage joint just is securely fixed in holding tank.While needing the dismounting shrinkage joint, by changing ambient conditions, make the packing material lower hardness, just be easy to shrinkage joint is taken out from the holding tank of fixing side bar.
The accompanying drawing explanation
Fig. 1 is the sectional view according to the easy replacing high-reliability bridge expanssion joint of the utility model preferred embodiment;
Fig. 2 is the sectional view according to the easy replacing high-reliability bridge expanssion joint of another preferred embodiment of the utility model.
The specific embodiment
Below in conjunction with accompanying drawing; by preferred embodiment, preferred forms of the present utility model is described; the specific embodiment here is to explain the utility model; and should not be construed as restriction of the present utility model; in the situation that do not break away from spirit of the present utility model and essential scope; can make various changes and modifications, within these all should be included in protection domain of the present utility model.
Referring to Fig. 1, wherein show the easy replacing high-reliability bridge expanssion joint of the utility model preferred embodiment, this shrinkage joint comprises body 3, stiffness variable bare terminal end and fixing side bar 1, body 3 and stiffness variable bare terminal end are connected, fixedly side bar 1 build-in is in bridge beam end 4 and form holding tank, described bare terminal end is embedded in described holding tank, the sealable opening (not shown) that described bare terminal end comprises cavity 2 and is communicated with this cavity 2, be filled with the hardenable packing material that is fluid state in described cavity 2.
Preferably, described packing material is resin.Preferably, described resin is gas, liquid or solid powder.Preferably, referring to Fig. 2, in described cavity 2, be provided with heating wire 5, be understandable that, packing material also can adopt other to change the mode of rigidity.Preferably, described packing material can be realized variable rigidity by changing temperature, for example, can have chemosetting under normal temperature, be subject to the characteristics of thermal softening.Preferably, described fixedly side bar 1 can be metal material, certainly, is understandable that, fixedly the material of side bar and form are not limit, as long as can have holding function.Preferably, described body 3 is rubber fastening band.Preferably, described holding tank can be C shape holding tank, is understandable that, the shape of holding tank can be selected according to the requirement in Practical Project, is not limited to above-mentioned C shape.
Preferably, but the cross section of the cavity 2 of potting resin material can be circular or other forms, and concrete cross sectional shape should not become restriction.
Embodiment 2
Shrinkage joint comprises rubber strip body 3, stiffness variable bare terminal end, fixedly side bar 1 and anchor device (not shown).Wherein said anchor device is used for fixedly side bar 1 of anchoring.
As accompanying drawing 2, fixedly side bar 1 adopts the metal side bar.Shrinkage joint body 3 adopts rubber fastening band.Bare terminal end is cavity structure, places in advance heating wire 5 in it.Fill the stiffness variable material in the bare terminal end cavity.The stiffness variable material can be resin.
Installation process
Before installation, anchoring is side bar 1 fixedly.Heating wire 5 is put into shrinkage joint bare terminal end cavity 2.The shrinkage joint bare terminal end is flattened, embed in the holding tank of side bar 1.With plunger displacement pump, by the cavity 2 of resin injection shrinkage joint 4 bare terminal ends, after being full of, the opening (not shown) of bare terminal end cavity 2 is sealed.Room temperature is solidified in 24 hours.Resin hardness after solidifying reaches 70 degree (Shao Shi A), can make shrinkage joint be installed to securely between the concrete structure at bridge two ends.
Use procedure
Shrinkage joint minimum serviceability temperature-35 ℃, 90 ℃ of maximum operation (service) temperatures, stretch 400%, and the shrinkage joint bare terminal end does not come off, the shrinkage joint not damaged.
Unloading process
Open shrinkage joint bare terminal end cavity 2, connect circuit by heating wire 5, mixes up voltage, make heating wire 5 keep 120 ℃ of temperature 60 minutes, the resin melted by heat in bare terminal end cavity 2, discharge bare terminal end cavity 2 from opening, now the rigidity of bare terminal end is returned to the cavity state substantially, takes out old seam.Repeat the shrinkage joint installation process, can conveniently complete shrinkage joint and change.
Be understandable that, can select different resin materials, adapt to different weather conditions, for example be adapted to tropical climate, frigid climate etc.
Compared with prior art, bare terminal end variable rigidity in the utility model, during installation, bare terminal end rigidity is lower, makes bare terminal end enter into easily fixedly in the side bar groove.During use, it is large that bare terminal end rigidity becomes, and chucking power significantly promotes, and prevents that shrinkage joint from coming off, and greatly improves functional reliability.While changing dismounting, bare terminal end rigidity can significantly reduce, and makes it easily from fixedly breaking away from the side bar groove, really accomplish the easy construction of bridge expanssion joint, easily replacing.
The utility model is not limited to above-mentioned specific embodiment. by regulating packing material kind, loading or ambient conditions, can control the bare terminal end stiffness variation.After filling, by some physics or chemical change, can make bare terminal end rigidity obviously improve.During dismounting and change, by changing the packing material ambient environmental conditions, promote its physics, chemical property to change, the bare terminal end stiffness degradation, the convenient bare terminal end that takes out is changed shrinkage joint.Wherein the packing material variation pattern comprises: number change, fineness variation, material softening, flow, distillation, degraded or gasification etc.Changing the ambient conditions of bare terminal end rigidity, can be temperature, stress, electric field, magnetic field, water and chemical mediator etc.These are understandable that, in the situation that do not break away from spirit of the present utility model and essential scope, can make various changes and modifications, within all should be included in protection domain of the present utility model.
Claims (2)
1. easily change the high-reliability bridge expanssion joint for one kind, it is characterized in that this shrinkage joint comprises body, stiffness variable bare terminal end and fixing side bar, body and stiffness variable bare terminal end are connected, fixedly the side bar build-in is in bridge beam end and form holding tank, described bare terminal end is embedded in described holding tank, the sealable opening that described bare terminal end comprises cavity and is communicated with this cavity, be filled with the hardenable packing material that is fluid state in described cavity.
2. bridge expanssion joint according to claim 1, is characterized in that described packing material is resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013200049362U CN203334178U (en) | 2013-01-05 | 2013-01-05 | High-reliability bridge expansion joint easy to replace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013200049362U CN203334178U (en) | 2013-01-05 | 2013-01-05 | High-reliability bridge expansion joint easy to replace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203334178U true CN203334178U (en) | 2013-12-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013200049362U Expired - Lifetime CN203334178U (en) | 2013-01-05 | 2013-01-05 | High-reliability bridge expansion joint easy to replace |
Country Status (1)
| Country | Link |
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| CN (1) | CN203334178U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111996908A (en) * | 2020-09-28 | 2020-11-27 | 山西交科桥梁隧道加固维护工程有限公司 | Bridge expansion device |
-
2013
- 2013-01-05 CN CN2013200049362U patent/CN203334178U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111996908A (en) * | 2020-09-28 | 2020-11-27 | 山西交科桥梁隧道加固维护工程有限公司 | Bridge expansion device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131211 |
|
| CX01 | Expiry of patent term |