CN217174354U - Double-column type prefabricated swing pier multiple damping structure system with replaceable prestressed tendons - Google Patents
Double-column type prefabricated swing pier multiple damping structure system with replaceable prestressed tendons Download PDFInfo
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- CN217174354U CN217174354U CN202122029127.4U CN202122029127U CN217174354U CN 217174354 U CN217174354 U CN 217174354U CN 202122029127 U CN202122029127 U CN 202122029127U CN 217174354 U CN217174354 U CN 217174354U
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Abstract
The utility model relates to a removable double-column type prefabrication of prestressing tendons sways multiple shock-absorbing structure system of pier, including the upper portion pontic, the cushion cap, a plurality of anchor backing plate, two prefabricated piers, a plurality of prestressing steel bundles and a plurality of pile foundation, the anchor backing plate buries in the middle part of prefabricated pier in advance, the tip of anchor backing plate stretches out prefabricated pier and forms anchor point, anchor point below is equipped with a plurality of vertical prestressing force pipelines, be equipped with a plurality of prestressing force pipelines that turn to in the cushion cap, vertical prestressing force pipeline with turn to prestressing force pipeline head and the tail intercommunication and form U type prestressing force pipeline, prestressing steel bundles's one end and an anchor point fixed connection of anchor backing plate, the other end passes vertical prestressing force pipeline in proper order, turn to prestressing force pipeline, behind the vertical prestressing force pipeline with the anchor point fixed connection of another anchor backing plate, form between the contact surface of prefabricated pier and cushion cap and sway the interface. Compared with the prior art, the utility model has the advantages of the damping performance is strong, restores, overhauls the convenience.
Description
Technical Field
The utility model belongs to the technical field of the bridge and specifically relates to a removable double-column type of prestressing tendons is prefabricated and is swayd multiple shock-absorbing structure system of pier is related to.
Background
The prefabricated bridge pier is a new research hotspot in the rapid construction of bridges, but the integrity is poor, the seismic performance of the member is weaker, and the seismic damage is serious in the earth earthquake all the time. The dynamic response of the pier can be effectively reduced by adopting the seismic isolation support, but the problem of out-of-control pier beam displacement exists under the action of strong shock. The prior art adopts a novel swing-self-reset bridge pier column system through research, verifies that the pier can reduce earthquake response through swing under the action of prestress, and has a self-reset function after an earthquake, but most of the researches are based on a single-pier test, and the application of the swing pier to practical engineering needs to solve several problems. Firstly, the unbonded prestressed tendons as key components are very critical, the existing prestress is usually arranged in a pier by adopting a high-strength twisted steel straight bundle or a steel strand U-shaped bundle, the prestress tension has higher requirement on the construction space, and the bending radius of the prestressed bundles of the latter has very high limit on the size of the pier. Secondly, the prestressed tendons are loosened, so that the prestress loss is brought, and the performance of the swing-self-resetting pier is seriously influenced. In addition, most of researches on the swing-self-reset structure are carried out on a single pier or a pier beam node, and the research work on a double-column pier system is less. However, in order to solve the problem of urban traffic congestion, a viaduct with a double-column pier as a main bearing member occupies a large proportion in the construction of an urban bridge, and the problem of shock absorption of the double-column pier is also urgently considered. Finally, the existing swing system does not relate to a support, pier beams are often connected or fixedly connected through shear keys and are not suitable for the situation of small assembled box beams or T beams, and the potential danger of overlarge swing angle and insufficient stability of the pier bottom under the action of strong shock exists by only adopting the swing system. In summary, the existing seismic isolation bearing system and the existing prefabricated swinging pier system can not meet the seismic requirements of some practical projects.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a removable double-column type prefabrication of prestressing tendons sways multiple shock-absorbing structure system of pier in order to overcome the defect that above-mentioned prior art exists.
The purpose of the utility model can be realized through the following technical scheme:
a double-column type prefabricated swinging pier multiple damping structure system with replaceable prestressed tendons comprises an upper bridge body, a bearing platform, a plurality of anchor backing plates, two prefabricated piers, a plurality of prestressed steel beams and a plurality of pile foundations, wherein the top surfaces of the pile foundations are fixedly connected with the bottom surface of the bearing platform, the prefabricated piers are vertically arranged on the bearing platform, the top surfaces of the prefabricated piers are fixedly connected with the bottom surface of the upper bridge body,
the anchor backing plate bury in the middle part of prefabricated pier in advance, the tip of anchor backing plate stretch out prefabricated pier and form anchor maintenance, anchor position below be equipped with a plurality of vertical prestressing force pipelines, the cushion cap in be equipped with a plurality of prestressing force pipelines that turn to, vertical prestressing force pipeline with turn to prestressing force pipeline head and the tail intercommunication and form U type prestressing force pipeline, the one end of prestressing force pencil and the anchor position fixed connection of an anchor backing plate, the other end pass vertical prestressing force pipeline in proper order, turn to behind prestressing force pipeline, the vertical prestressing force pipeline anchor position fixed connection with another anchor backing plate, the contact surface of prefabricated pier and cushion cap between form and sway the interface.
Preferably, the structural system further comprises a shear pin, the shear pin is arranged between contact surfaces of the prefabricated bridge pier and the bearing platform, a shear pin hole is formed in the top surface of the bearing platform, the top of the shear pin is connected with the prefabricated bridge pier, and the bottom of the shear pin is arranged in the shear pin hole.
Preferably, the structural system comprises four prestressed steel bundles, and the ends of the four prestressed steel bundles are respectively connected with the anchoring positions of the anchor backing plate.
Preferably, the anchoring position is provided with a prestress perforation, and the end part of the prestress steel beam upwards penetrates through the prestress perforation and then is anchored and connected with the anchor backing plate.
Preferably, the prestressed steel bundles are unbonded prestressed steel bundles.
Preferably, the structural system further comprises a protective cover, wherein the protective cover is covered on the anchoring position.
Preferably, the upper bridge body comprises a main beam and a prefabricated capping beam, the bottom surface of the prefabricated capping beam is fixedly connected with the top surfaces of the two prefabricated piers respectively, and the main beam is arranged on the prefabricated capping beam.
Preferably, the upper bridge body further comprises a stay rope shock absorption support which is arranged between the main beam and the prefabricated capping beam.
Preferably, cable shock mount include support roof, support bottom plate, support core and a plurality of cable, the top surface and the support roof fixed connection of support core, the bottom surface and the support bottom plate fixed connection of support core, the one end of cable and the side fixed connection of support roof, the other end and the side fixed connection of support bottom plate.
Preferably, prefabricated pier be reinforced concrete structure, prefabricated pier including the reinforcing bar of vertical setting, hoop locate the stirrup of reinforcing bar week side and form the concrete main part after the watering.
Compared with the prior art, the utility model has the advantages of as follows:
1) the utility model discloses based on cable shock mount and set up the cooperation of swaying interface and realize multiple shock attenuation effect, ensure that the structural system has under the prerequisite of sufficient intensity and rigidity, reduce the earthquake action that the structure bore, and provide effective power consumption ability and from reset ability, can solve traditional double-column pier structural system damage after the earthquake action and destroy seriously, the problem that the residual deformation is big, effectively be applied to the bridge scene of double-column mound, along with the seismic intensity increase, the utility model discloses can carry out the shock attenuation through cable shock mount, and make the pier enter into the state of swaying through swaying the interface and carry out multiple shock attenuation, effectively improve the shock attenuation effect, improve the anti-seismic performance of bridge and easily repair after shaking, enlarged cable shock mount and the range of application of swaying the pier moreover, the construction degree of difficulty is low, economic benefits is good;
2) the utility model discloses set up the outer U type prestressing steel bundle of mound, locate prefabricated pier side, cushion cap in, reduce the requirement to the pier size, need not lead to long arrangement of reinforcement in prefabricated pier, reduce the steel bundle quantity, do not increase the occupation of land width of pier, do not influence under the overpass the utilization that the sweetgum fruit went on the traffic space, set up in the pier both sides, be convenient for construct, overhaul, mend stretch-draw and change.
Drawings
FIG. 1 is a schematic side view of a transverse bridge of the present invention;
FIG. 2 is a schematic side view of a longitudinal bridge of the present invention;
FIG. 3 is a schematic cross-sectional structure view of a prefabricated swinging pier of the present invention;
fig. 4 is a schematic structural view of the stay cable shock mount of the present invention.
The steel structure comprises a main beam 1, a main beam 2, a stay rope shock absorption support 21, a support top plate 22, a support bottom plate 23, a support core body 24, a stay rope 3, a prefabricated capping beam 4, a prefabricated pier 5, a shear pin 6, a bearing platform 7, a prestressed steel beam 8, a swinging interface 9, a protective cover 10, an anchor backing plate 11, a pile foundation 12, a steel bar 13, concrete 14, a stirrup 15, a vertical prestressed pipeline 16 and a steering prestressed pipeline.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Note that the following description of the embodiments is merely an example of the nature, and the present invention is not intended to limit the application or the use thereof, and the present invention is not limited to the following embodiments.
Examples
In order to solve the problem that the 4 shock resistance of double-column type prefabricated pier is not enough, put pier system and subtract the problem that the shock insulation support system can not satisfy the antidetonation requirement completely, the utility model provides a removable double-column type prefabricated multiple shock-absorbing structure system of rocking pier of prestressing tendons can ensure under the prerequisite that the structural system has sufficient intensity and rigidity, reduces the earthquake action that the structure bore to provide effective power consumption ability and from the reset capability, can solve traditional double-column type pier structural system and damage serious, the big problem of residual deformation after the earthquake action damage, and U type prestressing tendons construction convenience in the invention does not have too big requirement to pier stud size, and convenient the detection after the earthquake, quick maintenance is changed, realizes antidetonation toughness.
Specifically, as shown in fig. 1-3, the utility model discloses a structural system includes upper portion pontic, cushion cap 6, shear pin 5, a plurality of anchor backing plate 10, two prefabricated piers 4, a plurality of prestressing force steel bundle 7, a plurality of pile foundation 11. The major structure is last, the top surface of pile foundation 11 and the bottom surface fixed connection of cushion cap 6, prefabricated pier 4 is vertical to be located on cushion cap 6, the top surface of prefabricated pier 4 and the bottom surface fixed connection of upper portion pontic, prestressing tendons 7 adopts unbonded prestressing tendons in this embodiment, prefabricated pier 4 is reinforced concrete structure, prefabricated pier 4 includes the reinforcing bar 12 of vertical setting, the hoop is located the stirrup 14 of reinforcing bar 12 week side and is formed concrete 13 main part after the watering, in this embodiment, the cross-section of prefabricated pier 4 is the rectangle, also can select other shapes such as circular according to actual conditions.
Specifically, in order to realize replaceable installation of the prestressed steel bundles 7, the anchor backing plates 10 are pre-embedded in the middle of the prefabricated bridge piers 4, the end portions of the anchor backing plates 10 extend out of the prefabricated bridge piers 4 to form anchoring positions, a plurality of vertical prestressed pipelines 15 are arranged below the anchoring positions, a plurality of steering prestressed pipelines 16 are arranged in the bearing platform 6, two ends of each steering prestressed pipeline 16 are arranged on the upper surface of the bearing platform 6, the main bodies of the steering prestressed pipelines 16 are turned in the bearing platform 6 to form turning angles, the vertical prestressed pipelines 15 are communicated with the steering prestressed pipelines 16 end to form U-shaped prestressed pipelines, one end of each prestressed steel bundle 7 is fixedly connected with the anchoring position of one anchor backing plate 10, the other end of each prestressed steel bundle passes through the vertical prestressed pipeline 15, the steering prestressed pipeline 16 and the vertical prestressed pipeline 15 in sequence and then is fixedly connected with the anchoring positions of the other anchor backing plates 10, and a swinging interface 8 is formed between the contact surfaces of the prefabricated bridge piers 4 and the bearing platform 6, the shear pin 5 is arranged between contact surfaces of the prefabricated bridge pier 4 and the bearing platform 6, a shear pin hole is formed in the top surface of the bearing platform 6, the top of the shear pin 5 is connected with the prefabricated bridge pier 4, and the bottom of the shear pin 5 is arranged in the shear pin hole.
In addition, in this embodiment, four prestressed steel bundles 7 are provided, four sets of U-shaped prestressed pipes are correspondingly installed, eight anchor backing plates 10 are provided, prestressed through holes are formed in the anchoring positions, two ends of each of the four prestressed steel bundles 7 are respectively connected with the anchoring positions of the anchor backing plates 10 on the side surfaces of the pier bodies of the two prefabricated piers 4 in a corresponding manner, and the end portions of the prestressed steel bundles 7 upwardly penetrate through the prestressed through holes and then are connected with the anchor backing plates 10 in an anchoring manner.
In this embodiment, in order to protect the prestressed steel bundles 7 outside the prefabricated pier 4, the structural system further includes a protective cover 9, and the protective cover 9 is covered on the anchor.
Based on above-mentioned prestressing force steel bundle 7's mounting means, structural style, from design, construction aspect, the utility model provides a structural system can enlarge the range of application of post-tensioned prestressing force connection pier, and does not increase extra design, the construction degree of difficulty, has the engineering feasibility, mainly embodies in following several points:
1. two ends of the U-shaped prestressed steel bundles 7 are respectively anchored in the two prefabricated piers 4, and the radius of curvature of the corner is large, so that the prestress loss can be reduced, and the requirement on the size of the prefabricated piers 4 is lowered;
2. the U-shaped prestressed steel bundles 7 are anchored at two sides of the bottom of the prefabricated pier body 4, long reinforcing bars do not need to be arranged in the prefabricated pier 4, and the using amount of steel bundles is reduced;
3. the U-shaped prestressed steel bundles 7 are anchored on two sides of the pier body, so that the occupied area width of the prefabricated pier 4 is not increased, and the utilization of the traffic space of the lower road of the viaduct is not influenced;
4. the shearing pins 5 and other aspects of the pier and the bearing platform 6 are mature, and the construction difficulty is not increased additionally.
In addition, as shown in fig. 1, 4, in order to improve the utility model discloses an anti-seismic performance, the upper portion pontic includes girder 1, prefabricated bent cap 3, cable shock mount 2, the bottom surface of prefabricated bent cap 3 respectively with two prefabricated pier 4's top surface fixed connection, on girder 1 located prefabricated bent cap 3, cable shock mount 2 located between girder 1, the prefabricated bent cap 3. Specifically, cable vibration damper 2 includes support roof 21, support bottom plate 22, support core 23 and a plurality of cable 24, the top surface and the support roof 21 fixed connection of support core 23, the bottom surface and the support bottom plate 22 fixed connection of support core 23, the one end of cable 24 and the side fixed connection of support roof 21, the other end and the side fixed connection of support bottom plate 22. Girder 1 of this embodiment adopts little box girder structure in the utility model discloses an in other embodiments, also can be forms such as T roof beam, whole box girder.
In order to improve the performance of the stay cable shock absorption support 2, the free stroke of the stay cable 24 can be obtained according to the allowable pier beam displacement, and the shock absorption support core body 23 can be determined according to actual engineering by adopting a lead core support, a friction pendulum support, a combined rubber support and the like.
The utility model discloses a theory of operation does:
in normal use state, adopt cable shock mount 2 can release temperature displacement, can satisfy the deformation demand that normal use state temperature variation arouses, reduce 4 internal forces of prefabricated pier.
Under the action of small and medium earthquakes, the stay cable shock absorption support 2 yields to reduce the earthquake response, the main beam 1 displacement is mainly provided by the stay cable shock absorption support 2, the horizontal inertia force transmitted to the lower structure is reduced, and the pier keeps elasticity.
Along with the increase of earthquake intensity, the displacement of the stay cable shock absorption support 2 is increased to the free stroke of the stay cable 24, the stay cable 24 is tensioned, the displacement of the stay cable shock absorption support 2 is not increased any more, the further development of the pier beam displacement is limited, and the problems of beam body collision, expansion joint damage and even beam falling damage and the like caused by overlarge pier beam displacement are avoided; the internal force of the substructure is increased due to the tensioning of the stay cable 24 until the bending moment at the bottom of the pier exceeds the critical bending moment, so that the pier enters a swinging state, the structural period of the bridge is further prolonged, the input of seismic energy is isolated, and the multiple damping function is realized.
After earthquake action, the resetting capability can be provided through the prestressed tendons and the self weight of the structure, and the residual displacement is reduced. The pier body of the pier basically keeps elasticity, the stay cable shock absorption support 2 is simple to reset, and the U-shaped unbonded prestressed steel bundles anchored on the pier body are also very convenient to detect, supplement, stretch and replace, so that the pier body is quickly repaired after being shaken. The utility model discloses all have good working property under normal use state and earthquake effect, be worth using widely in actual engineering.
The above embodiments are merely examples and do not limit the scope of the present invention. These embodiments may be implemented in other various manners, and various omissions, substitutions, and changes may be made without departing from the technical spirit of the present invention.
Claims (10)
1. A double-column type prefabricated swinging pier multiple damping structure system with replaceable prestressed tendons is characterized by comprising an upper bridge body, a bearing platform (6), a plurality of anchor backing plates (10), two prefabricated piers (4), a plurality of prestressed steel beams (7) and a plurality of pile foundations (11), wherein the top surface of each pile foundation (11) is fixedly connected with the bottom surface of the bearing platform (6), the prefabricated piers (4) are vertically arranged on the bearing platform (6), the top surface of each prefabricated pier (4) is fixedly connected with the bottom surface of the upper bridge body,
the anchor backing plate (10) is pre-buried in the middle of the prefabricated pier (4), the end part of the anchor backing plate (10) extends out of the prefabricated pier (4) to form anchoring, a plurality of vertical prestressed pipelines (15) are arranged below the anchoring position, a plurality of steering prestressed pipelines (16) are arranged in the bearing platform (6), the vertical prestressed pipeline (15) is communicated with the steering prestressed pipeline (16) end to form a U-shaped prestressed pipeline, one end of the prestressed steel bundle (7) is fixedly connected with the anchoring position of one anchor backing plate (10), the other end of the prestressed steel bundle passes through the vertical prestressed pipeline (15), the steering prestressed pipeline (16) and the vertical prestressed pipeline (15) in sequence and then is fixedly connected with the anchoring position of the other anchor backing plate (10), and a swinging interface (8) is formed between the contact surfaces of the prefabricated pier (4) and the bearing platform (6).
2. The multi-damping structure system of the double-column type prefabricated swinging pier with the replaceable prestressed tendons as claimed in claim 1, wherein the structure system further comprises shear pins (5), the shear pins (5) are arranged between contact surfaces of the prefabricated pier (4) and a bearing platform (6), shear pin holes are formed in the top surface of the bearing platform (6), the tops of the shear pins (5) are connected with the prefabricated pier (4), and the bottoms of the shear pins (5) are arranged in the shear pin holes.
3. The multi-damping structure system for the precast dual post type pier with the replaceable prestressed tendons of claim 1, wherein the structure system comprises four prestressed steel bundles (7), and the ends of the four prestressed steel bundles (7) are respectively connected with the anchoring positions of the anchor backing plates (10).
4. The multi-damping structure system of double-column precast swinging pier with replaceable prestressed tendons as claimed in claim 1, wherein the anchoring position is provided with prestressed through holes, and the end of the prestressed steel bundle (7) penetrates upwards through the prestressed through holes and then is anchored and connected with the anchor backing plate (10).
5. The precast dual post pier multi-damping structure system with replaceable tendons of claim 1, wherein the prestressed steel bundles (7) are unbonded prestressed steel bundles.
6. The multiple shock-absorbing structure system of a precast dual post type pier with replaceable tendons of claim 1, wherein the structure system further comprises a protection cover (9), and the protection cover (9) is covered on the anchoring position.
7. The multi-damping structure system of the double-column type prefabricated swinging pier with the replaceable prestressed tendons as claimed in claim 1, wherein the upper bridge body comprises a main beam (1) and prefabricated capping beams (3), the bottom surfaces of the prefabricated capping beams (3) are fixedly connected with the top surfaces of two prefabricated piers (4) respectively, and the main beam (1) is arranged on the prefabricated capping beams (3).
8. The multi-damping structure system of the double-column precast swinging pier with the replaceable prestressed tendons according to claim 7, wherein the upper bridge body further comprises a stay rope damping support (2), and the stay rope damping support (2) is arranged between the main beam (1) and the precast capping beam (3).
9. The multi-damping structure system of the double-column type precast swinging pier with the replaceable prestressed tendons as claimed in claim 8, wherein the cable damping support (2) comprises a support top plate (21), a support bottom plate (22), a support core (23) and a plurality of cables (24), the top surface of the support core (23) is fixedly connected with the support top plate (21), the bottom surface of the support core (23) is fixedly connected with the support bottom plate (22), one end of each cable (24) is fixedly connected with the side surface of the support top plate (21), and the other end of each cable is fixedly connected with the side surface of the support bottom plate (22).
10. The multi-damping structure system of the double-column prefabricated swinging pier with the replaceable prestressed tendons as claimed in claim 1, wherein the prefabricated pier (4) is of a reinforced concrete structure, and the prefabricated pier (4) comprises vertically arranged reinforcing steel bars (12), stirrups (14) hooped on the peripheral sides of the reinforcing steel bars (12) and a concrete (13) body formed after pouring.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122029127.4U CN217174354U (en) | 2021-08-26 | 2021-08-26 | Double-column type prefabricated swing pier multiple damping structure system with replaceable prestressed tendons |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122029127.4U CN217174354U (en) | 2021-08-26 | 2021-08-26 | Double-column type prefabricated swing pier multiple damping structure system with replaceable prestressed tendons |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113718639A (en) * | 2021-08-26 | 2021-11-30 | 同济大学建筑设计研究院(集团)有限公司 | Double-column type prefabricated swing pier multiple damping structure system with replaceable prestressed tendons |
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2021
- 2021-08-26 CN CN202122029127.4U patent/CN217174354U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113718639A (en) * | 2021-08-26 | 2021-11-30 | 同济大学建筑设计研究院(集团)有限公司 | Double-column type prefabricated swing pier multiple damping structure system with replaceable prestressed tendons |
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