CN217352105U - Assembled reinforced concrete pier based on grouting sleeve - Google Patents
Assembled reinforced concrete pier based on grouting sleeve Download PDFInfo
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- CN217352105U CN217352105U CN202220992854.2U CN202220992854U CN217352105U CN 217352105 U CN217352105 U CN 217352105U CN 202220992854 U CN202220992854 U CN 202220992854U CN 217352105 U CN217352105 U CN 217352105U
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- pier
- bearing platform
- main body
- sleeve
- energy consumption
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- 239000011150 reinforced concrete Substances 0.000 title claims abstract description 14
- 238000005265 energy consumption Methods 0.000 claims abstract description 43
- 239000011440 grout Substances 0.000 claims abstract description 15
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- 230000003014 reinforcing effect Effects 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002002 slurry Substances 0.000 claims description 5
- 238000005452 bending Methods 0.000 abstract description 4
- 230000001902 propagating effect Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract 1
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 19
- 230000015556 catabolic process Effects 0.000 description 13
- 238000006731 degradation reaction Methods 0.000 description 13
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 11
- 238000006073 displacement reaction Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 229910001141 Ductile iron Inorganic materials 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 239000004567 concrete Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000009417 prefabrication Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
Abstract
The utility model provides a based on grout sleeve assembled reinforced concrete pier belongs to bridge engineering technical field to solve traditional pier frusta face when receiving the great seismic force of load capacity, take place bending deformation fracture even easily, restore very trouble problem, including the cushion cap subassembly: the bottom of the grouting sleeve structure is connected with the bearing platform assembly; the bottom of the pier stud assembly is connected with a grouting sleeve structure; one end of the top of the external energy consumption device is connected with the pier stud assembly; the pier stud in the device is prefabricated in a workshop, a bearing platform can be prefabricated in the workshop or cast in place, and two components are connected and installed in the site by a grouting sleeve; in order to improve the seismic performance of the bridge, an energy consumption device is arranged outside the pier stud body and used for absorbing seismic wave energy and preventing the seismic waves from further propagating to the upper part of the bridge body; the bridge anti-seismic design is facilitated, and the bridge anti-seismic method is suitable for rapid bridge restoration after an earthquake disaster.
Description
Technical Field
The utility model belongs to the technical field of bridge engineering, more specifically say, in particular to assembled reinforced concrete pier based on grout sleeve.
Background
The bridge pier belongs to a lower structure of a bridge, bears the load transmitted from the upper part of the bridge and transmits the load into a foundation; when the pier mainly bears the axial load, during the great earthquake power of load capacity volume, traditional pier, including cast-in-place pier and grout sleeve assembled pier, all can appear many horizontal bending cracks and curved shear inclined crack on the pier stud face, produce obvious bending deformation, the emergence is cracked even, the earthquake is gone back, restores to pier stud plasticity hinge and just is a big difficult problem in the engineering, needs to change whole pier stud, wastes time and energy.
In view of the above, the present invention provides a reinforced concrete pier assembled based on a grouting sleeve, which is improved in view of the existing structure and defects, so as to achieve the purpose of higher practical value.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a based on grout sleeve assembled reinforced concrete pier to solve traditional pier frusta face that proposes in the above-mentioned background art when receiving the great earthquake power of load capacity, take place bending deformation easily and split even, restore very trouble problem.
The utility model discloses purpose and efficiency based on grout sleeve assembled reinforced concrete pier is reached by following specific technological means:
assembled reinforced concrete pier based on grout sleeve, including the cushion cap subassembly:
the whole bearing platform assembly is of a cuboid structure; the bottom of the grouting sleeve structure is connected with the bearing platform assembly; the bottom of the pier column component is connected with a grouting sleeve structure, and the bearing platform component is fixedly connected with the pier column component through the grouting sleeve structure; the device comprises an external energy consumption device, wherein one end of the top of the external energy consumption device is connected with the pier stud assembly, and the bottom of the external energy consumption device is connected with the bearing platform assembly.
Further, the cap assembly includes:
the bearing platform main body is of a cuboid structure as a whole; cushion cap reinforcing bar, inside cushion cap main part was inserted to cushion cap reinforcing bar one end is fixed.
Further, the grout sleeve structure comprises:
the top of the sleeve main body is connected with the bearing platform steel bar; the slurry outlet is fixedly formed in the surface of the top of the sleeve main body; the grouting opening is fixedly formed in the surface of the bottom of the sleeve main body; the reinforcing steel bar limiting blocking ring is fixedly installed on the sleeve body, and the bearing platform reinforcing steel bar penetrates through the reinforcing steel bar limiting blocking ring and is inserted into the sleeve body.
Further, the pier stud assembly comprises:
the bottom of the pier column main body is connected with the bearing platform main body; pier stud reinforcing bar, inside pier stud reinforcing bar top one end was fixed to be inserted the pier stud main part, inside pier stud reinforcing bar bottom one end inserted the sleeve main part.
Further, the external energy consumption device comprises:
one end of the fixing plate A is fixedly connected with the pier stud main body; the bottom of the fixed plate B is fixedly connected with the bearing platform main body; the axial connectors are arranged in two groups, and are fixedly arranged on the inner sides of the fixing plates A and B; the upper end and the lower end of the metal viscous damper are connected with the fixing plate A and the fixing plate B through axial connectors.
Compared with the prior art, the utility model discloses following beneficial effect has:
the external energy dissipation device is arranged in the device, so that when the device is normally used, the energy dissipation device enhances the connection between the pier column and the bearing platform, and the overall rigidity of the pier is enhanced; once an earthquake occurs, the energy consumption device can absorb earthquake wave energy and prevent the earthquake wave from further propagating into the bridge body; after the energy consumption device is added, compared with the situation that the energy consumption device is not added, the parameter design result of the energy consumption device meets the following requirements: the hysteresis curve of the pier is fuller, and the capability of absorbing seismic wave energy is obviously increased; the ultimate bearing capacity of the bridge pier is improved, the yield of the external energy dissipation device is guaranteed to be prior to the grouting sleeve and the reinforcing steel bar in the bridge pier body, the internal structure of the bridge pier is effectively protected, the continuous and stable energy dissipation of the bridge pier structure is facilitated, and the overhaul of the bridge after an earthquake is avoided; after the energy consumption device is additionally arranged, the rigidity degradation of the pier is reduced under the action of earthquake load, meanwhile, the strength degradation is also obviously reduced, and the pier is ensured to have good earthquake resistance.
Drawings
Fig. 1 is a schematic diagram of the side view of the main body shaft of the present invention.
Fig. 2 is a schematic view of the main body of the present invention.
Fig. 3 is a structural schematic diagram of the grouting sleeve structure of the present invention.
Fig. 4 is a schematic side view of the external energy dissipation device of the present invention.
In the drawings, the corresponding relationship between the component names and the reference numbers is as follows:
1. a cap assembly; 101. a cushion cap main body; 102. bearing platform steel bars; 2. grouting a sleeve structure; 201. a sleeve body; 202. a pulp outlet; 203. a mud jacking port; 204. a steel bar limiting baffle ring; 3. a pier stud assembly; 301. a pier stud body; 302. pier stud reinforcing steel bars; 4. An external energy consumption device; 401. fixing a plate A; 402. a fixing plate B; 403. an axial connector; 404. a metal viscous damper.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like indicate orientations or positional relationships that are based on the orientations or positional relationships shown in the drawings, and are merely for convenience of description and simplicity of description, rather than to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.
Example (b):
as shown in figures 1 to 4:
the utility model provides a based on grout sleeve assembled reinforced concrete pier, including cushion cap subassembly 1:
the whole bearing platform assembly 1 is of a cuboid structure; the bottom of the grouting sleeve structure 2 is connected with the bearing platform assembly 1; the bottom of the pier column component 3 is connected with the grouting sleeve structure 2, and the cushion cap component 1 is fixedly connected with the pier column component 3 through the grouting sleeve structure 2; external power consumption device 4, external power consumption device 4 top one end is connected with pier stud subassembly 3, and external power consumption device 4 bottom is connected with cushion cap subassembly 1.
As shown in fig. 2, the cap assembly 1 includes:
the bearing platform comprises a bearing platform main body 101, wherein the whole bearing platform main body 101 is of a cuboid structure, and the bearing platform main body 101 can play a role in auxiliary support of a bridge; and a bearing steel bar 102, wherein one end of the bearing steel bar 102 is fixedly inserted into the bearing main body 101.
As shown in fig. 3, the grout sleeve structure 2 includes:
the sleeve main body 201 is of a cylindrical structure with a hollow interior, the top of the sleeve main body 201 is connected with the pile cap reinforcing steel bar 102, the grouting sleeve can be made of carbon steel or nodular cast iron, and if the nodular cast iron is good in durability, the ductile property of the grouting sleeve is poor, and the grouting sleeve is unfavorable for resisting shock and absorbing energy; if a low-carbon steel material is adopted, the ductility is good, shock resistance and energy absorption are facilitated, but corrosion resistance and rust resistance in the future need to be considered; the sleeve is made of high-strength materials; the slurry outlet 202 is fixedly arranged on the surface of the top of the sleeve main body 201; the grout pressing port 203 is fixedly formed in the bottom surface of the sleeve main body 201; the reinforcing steel bar limiting stop ring 204 is fixedly installed on the sleeve main body 201, the bearing platform reinforcing steel bars 102 penetrate through the reinforcing steel bar limiting stop ring 204 and are inserted into the sleeve main body 201, and the reinforcing steel bar limiting stop ring 204 is used for limiting the sliding effect of the bearing platform reinforcing steel bars 102.
As shown in fig. 2, the pier stud assembly 3 comprises:
the pier column main body 301 is characterized in that the bottom of the pier column main body 301 is connected with the bearing platform main body 101, and the pier column is a bearing component and mainly bears vertical load and comprises the self weight of a pier, the weight of a bridge span structure and the live load of a vehicle; the bridge horizontal force can be generated by the braking force, the temperature load and the earthquake load of the vehicle, the bridge pier needs good ductility to resist the transverse shear load, and when the bridge pier is damaged, the excessive energy is consumed by deformation; pier stud reinforcing bar 302, inside pier stud reinforcing bar 302 top one end was fixed to be inserted into pier stud main part 301, inside pier stud reinforcing bar 302 bottom one end was inserted into sleeve main part 201.
As shown in fig. 4, the external energy consumption device 4 includes:
one end of the fixing plate A401 is fixedly connected with the pier stud main body 301; the bottom of the fixing plate B402 is fixedly connected with the bearing platform main body 101; two sets of axial connectors 403 are provided, and the axial connectors 403 are fixedly installed inside the fixing plates a401 and B402; metal viscous damper 404, both ends are connected with fixed plate A401, fixed plate B402 through axial connector 403 about metal viscous damper 404, and metal viscous damper 404 can play fine antidetonation power consumption effect, protects the pier bottom and avoids destroying.
The specific use mode and function of the embodiment are as follows:
in the utility model, when in use, the prefabricated assembly construction is adopted, and the pier stud main body 301 adopts C40 or concrete with higher grade, must be manufactured in a prefabricated site and then is transported to a construction site; the bearing platform main body 101 is made of C30 or concrete with higher grade, and can be prefabricated or cast in situ; in order to facilitate the connection between the pier column and the bearing platform, pier column reinforcing steel bars 302 and bearing platform reinforcing steel bars 102 are embedded in the pier column main body 301 and the bearing platform main body 101, after prefabrication is completed, the pier column reinforcing steel bars 302 and the bearing platform reinforcing steel bars 102 are required to be transported to the site for assembly, the pier column reinforcing steel bars 302 and the bearing platform reinforcing steel bars 102 are inserted into the sleeve main body 201, the depth length of the prefabricated installation end and the site assembly end pier column reinforcing steel bars 302 and the bearing platform reinforcing steel bars 102 is not less than 10dsds, slurry is poured in, and the pier column main body 301 and the bearing platform main body 101 are fixedly connected; when the pier column is installed, the direction of the sleeve is correctly placed, the performance of a grouting connecting sleeve and sleeve grouting material combined system is in accordance with the relevant national standard, the actually measured tensile strength of a joint test piece is not less than the actual breaking strength of a connected steel bar, external energy dissipation devices are arranged outside the pier column main body 301 and the bearing platform main body 101, the anti-seismic performance is improved, the connection between the pier column and the bearing platform is increased, and the pier is protected by yielding in advance through the energy dissipation devices; the energy consumption devices need to be arranged along the bridge direction, 1 pair, 2 pairs, 3 pairs and a plurality of pairs can be arranged along the transverse direction, in the actual work, the number of energy consumption components can be determined through numerical analysis, and the design principle is to ensure that the area surrounded by the hysteresis curve of the pier stud is larger than the condition without the energy consumption components and meet the requirement of earthquake resistance; meanwhile, the pier bottom of the pier is protected from being damaged.
The utility model discloses grout sleeve assembled reinforced concrete pier with outer wall additional energy consumption device can directly integrate into bridge engineering design, and its working property, safe and reliable degree need pass through practice inspection, from the aspects such as hysteresis curve, skeleton curve, rigidity degradation, intensity degradation of structure, the analysis the utility model discloses the influence of pier to shock resistance performance; considering the horizontal earthquake action, selecting EL-Centro waves, Osaka Gongbo waves and Tangshan earthquake waves to perform time-course analysis, determining a horizontal acceleration response spectrum according to relevant specifications and the acquired earthquake motion parameters, and further acquiring acceleration time-course curves of the three earthquake waves; in addition to the action of earthquake power, the pressure distributed to a single pier by a bridge span structure, the self weight of the pier, and the horizontal force distributed by automobile braking force and temperature change stress are still considered; the larger the area surrounded by the hysteresis curve is, the stronger the energy consumption capacity is, and the better the anti-seismic effect is; therefore, analysis of the hysteresis curve is implemented, and the structure seismic performance is guided; at the initial loading stage, the structure is in an elastic state, and the action of the energy consumption device is not reflected; along with the continuous increase of the load, the area of the hysteresis loop is continuously increased, the energy consumption is increased, along with the continuous increase of the displacement, the rigidity of the pier is degraded, and the residual deformation is increased; after the load reaches the limit bearing capacity; after the energy consumption device is added, the load and rigidity which need to keep a hysteresis curve are not obviously reduced, so that the hysteresis ring has larger area and stronger energy consumption capability; meanwhile, the rigidity and the number of the energy consumption devices can be subjected to parametric analysis through comparison of hysteresis curves so as to determine the most appropriate arrangement of the energy consumption devices of the grouting sleeve connected pier; the framework curve is an envelope curve of a load-displacement curve, and can reflect the mechanical characteristics of pier structures of different connection types at different stress stages, so that the framework curve is very important to be researched; in the elastic stage, the slope of the skeleton curve provided with the energy consumption device is required to be increased, and the additional arrangement of the energy consumption device increases the deformation resistance of the structure, so that the initial elastic rigidity of the pier is improved; after the energy consumption device is yielded, the grouting sleeve is subsequently yielded, and the framework curve has a peak point; obviously, the ultimate bearing capacity of the assembled pier can be further improved by the external pier energy dissipation device according to the skeleton curve; moreover, the external energy dissipation device can be yielded before the grouting sleeve and the steel bar, so that the internal structure of the pier is effectively protected, and continuous and stable energy dissipation of the pier structure is facilitated; under the action of displacement load, along with the increase of the loading cycle times, the structural rigidity is degraded, and the displacement corresponding to the ultimate bearing capacity of the structure is increased; the rigidity degradation of the structure determines the damage condition of the structure to a certain degree, and the structure is an important index of the anti-seismic performance of the structure; the rigidity degradation belongs to a normal phenomenon, but the rigidity degradation cannot be too large, otherwise, the damage generated by the structure has large influence on the rigidity, the structure is unfavorable for the anti-seismic performance, the rigidity degradation is small, continuous and stable, and the anti-seismic performance of the structure is better; the assembled pier with the external energy consumption device is characterized in that an energy consumption component with a low yield point is added on the basis of a conventional assembled pier, the initial rigidity of the energy consumption component is high, and the energy consumption device is externally arranged on two sides of a pier column of the pier, so that the initial rigidity of the whole pier is improved; the rigidity of the assembled pier can be reduced along with the increase of the corner, the stress performance of the pier of the assembled pier with the external energy consumption device is changed under the action of the energy consumption component, the energy consumption device bears certain load, the load borne by each component in the pier is correspondingly reduced, and the corner of the pier column of the pier is reduced under the same loading displacement; therefore, the rigidity degradation of the assembly type pier with the external energy consumption device is smaller than that of the conventional assembly type pier, the assembly type pier is most obvious in the middle displacement loading stage, and the energy consumption device is in the yield energy consumption stage and fully plays a role; the strength degradation refers to the phenomenon that when the maximum loading displacement is kept unchanged, the corresponding node load is reduced along with the increase of the cycle times, and the strength degradation is too large and is unfavorable for the seismic performance of the structure; under the condition of small displacement loading, the stress of the bridge pier is small, the bridge pier enters a plasticity stage at the beginning, the bridge pier is not obviously damaged, and the strength is not obviously reduced; after the strength reaches the maximum value, the pier provided with the energy consumption device has better strength due to the fact that the strength degradation is greatly improved compared with the conventional grouting sleeve connection pier, the structure has better earthquake-resistant performance and can better resist earthquake effect; the larger the rigidity and the larger the number of the energy consumption devices are, the more obvious the effect of improving the strength degradation of the pier is; therefore, in order to ensure better strength and better seismic performance of the bridge pier, the number and the rigidity of the energy dissipation members should be increased and increased appropriately.
The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed, many modifications and variations will be apparent to those skilled in the art, and the embodiments were chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.
Claims (4)
1. Based on grout sleeve assembled reinforced concrete pier, its characterized in that: comprises a bearing platform component (1):
the bearing platform assembly (1) is integrally of a cuboid structure; the bottom of the grouting sleeve structure (2) is connected with the bearing platform assembly (1); the bottom of the pier column component (3) is connected with the grouting sleeve structure (2), and the bearing platform component (1) is fixedly connected with the pier column component (3) through the grouting sleeve structure (2); the device comprises an external energy consumption device (4), wherein one end of the top of the external energy consumption device (4) is connected with the pier stud assembly (3), and the bottom of the external energy consumption device (4) is connected with the bearing platform assembly (1); the external energy consumption device (4) further comprises: one end of the fixing plate A (401) is fixedly connected with the pier stud main body (301); the bottom of the fixing plate B (402) is fixedly connected with the bearing platform main body (101); the number of the axial connectors (403) is two, and the axial connectors (403) are fixedly arranged on the inner sides of the fixing plate A (401) and the fixing plate B (402); the upper end and the lower end of the metal viscous damper (404) are connected with the fixing plate A (401) and the fixing plate B (402) through axial connectors (403).
2. The fabricated reinforced concrete pier based on the grouting sleeve as claimed in claim 1, wherein: the cap assembly (1) comprises:
the bearing platform main body (101), the whole bearing platform main body (101) is of a cuboid structure; and one end of the bearing platform steel bar (102) is fixedly inserted into the bearing platform main body (101).
3. The fabricated reinforced concrete pier based on the grouting sleeve as claimed in claim 2, wherein: the grout sleeve structure (2) comprises:
the top of the sleeve main body (201) is connected with the bearing platform steel bar (102); the slurry outlet (202), the slurry outlet (202) is fixedly arranged on the top surface of the sleeve main body (201); the grout pressing port (203), the grout pressing port (203) is fixedly arranged on the bottom surface of the sleeve main body (201); the steel bar limiting stop ring (204) is fixedly installed on the sleeve main body (201), and the bearing platform steel bar (102) penetrates through the steel bar limiting stop ring (204) and is inserted into the sleeve main body (201).
4. An assembled reinforced concrete pier based on a grouting sleeve as claimed in claim 3, wherein: the pier stud assembly (3) comprises:
the pier column main body (301), the bottom of the pier column main body (301) is connected with the bearing platform main body (101); pier stud reinforcing bar (302), inside pier stud reinforcing bar (302) top one end is fixed to be inserted pier stud main part (301), inside pier stud reinforcing bar (302) bottom one end inserts sleeve main part (201).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220992854.2U CN217352105U (en) | 2022-04-27 | 2022-04-27 | Assembled reinforced concrete pier based on grouting sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220992854.2U CN217352105U (en) | 2022-04-27 | 2022-04-27 | Assembled reinforced concrete pier based on grouting sleeve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217352105U true CN217352105U (en) | 2022-09-02 |
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ID=83056609
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220992854.2U Expired - Fee Related CN217352105U (en) | 2022-04-27 | 2022-04-27 | Assembled reinforced concrete pier based on grouting sleeve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217352105U (en) |
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2022
- 2022-04-27 CN CN202220992854.2U patent/CN217352105U/en not_active Expired - Fee Related
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220902 |