CN212357961U - Partially unbonded grouting corrugated pipe prefabrication, assembling and connecting structure - Google Patents
Partially unbonded grouting corrugated pipe prefabrication, assembling and connecting structure Download PDFInfo
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- CN212357961U CN212357961U CN202022107315.XU CN202022107315U CN212357961U CN 212357961 U CN212357961 U CN 212357961U CN 202022107315 U CN202022107315 U CN 202022107315U CN 212357961 U CN212357961 U CN 212357961U
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Abstract
The utility model relates to a partially unbonded grouting corrugated pipe prefabrication, splicing and connecting structure, which comprises main ribs, a metal corrugated pipe and a sleeve, wherein the end parts of the main ribs are required to be anchored in a bearing platform or a bent cap; the metal corrugated pipe is pre-buried in the bearing platform or the capping beam, and dense fillers are pressed and filled in the metal corrugated pipe to realize anchoring connection with the main ribs; the main rib close to a certain length of the joint side in the metal corrugated pipe is coated with anti-corrosion lubricating grease, the sleeve with the corresponding length is sleeved outside the metal corrugated pipe, the two ends of the sleeve are subjected to water seal treatment by using flexible sealant, and the sleeve is fixed by adopting a spring clamp before pouring of a pier, so that a main rib non-bonding section is formed on the main rib. Compared with the prior art, the utility model can relieve the stress concentration at the joint, prolong the yield length of the main reinforcement around the joint, improve the ductility and energy consumption of the prefabricated assembled pier, reduce the strain rate of the main reinforcement at the joint and improve the fatigue performance; the whole connecting structure is simple in construction, easy to operate and convenient to popularize and apply.
Description
Technical Field
The utility model belongs to the technical field of the bridge engineering technique and specifically relates to a connection structure is assembled in prefabrication of part unbonded grout bellows is related to.
Background
For the prefabricated assembled bridge, the performance of the connection between prefabricated parts is one of the most direct and key factors influencing the static and dynamic response of the bridge structure. The traditional grouting metal corrugated pipe connecting structure is favored by domestic and foreign scholars due to the characteristics of quick construction, good performance and low manufacturing cost, and is adopted by a plurality of construction units due to higher tolerance error.
However, based on the pseudo-static test and the vibration table test of the traditional grouting metal corrugated pipe connecting structure, the results show that: the plastic hinge length at the bottom of the prefabricated assembled pier connected by the traditional grouting metal corrugated pipe is smaller than that of a cast-in-place pier, and deformation is mainly concentrated at the joint position, so that the ductility and energy consumption of the prefabricated assembled pier connected by the grouting metal corrugated pipe are lower than those of the cast-in-place pier, and the prefabricated assembled pier connected by the grouting metal corrugated pipe is not suitable for being applied to piers in medium and high intensity earthquake regions.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a connection structure is assembled in order to overcome the defect that above-mentioned prior art exists and provide the prefabrication of part unbonded grout bellows, through setting up the unbonded section to the owner muscle in the corrugated metal pipe, not only can improve the ductility performance and the power consumption ability of pier, improve owner muscle fatigue performance, this technical scheme construction is simple simultaneously, easily operation, and economic nature is strong, facilitate promotion and application.
The purpose of the utility model can be realized through the following technical scheme:
the utility model discloses well unbonded grout bellows prefabrication is assembled connection structure, including main muscle, corrugated metal pipe and sleeve pipe, wherein specifically:
the end part of the main pier rib needs to be anchored in a bearing platform or a capping beam;
the metal corrugated pipe is pre-buried in the bearing platform or the capping beam, and dense fillers are pressed and filled in the metal corrugated pipe to realize anchoring connection with the main ribs;
the sleeve pipe cover is located on the main muscle, in the pier hoist and mount process, the main muscle is inserted corrugated metal pipe, the sleeve pipe is whole to be located corrugated metal pipe or the part extends to corrugated metal pipe outside, and main muscle unbonded section is in near seam crossing after pier hoist and mount are accomplished to this constitutes main muscle unbonded section on the main muscle for near main muscle strain evenly distributed of seam crossing.
Further, the length of the main rib unbonded section is 8-10 times of the diameter of the main rib.
Further, the non-bonding section of the main rib is coated with an anti-corrosion lubricating grease layer. Increase the non-adhesive performance and improve the corrosion resistance.
Furthermore, flexible sealant is arranged on the inner walls of the two ends of the sleeve to form water seal structures at the two ends.
Further, the flexible sealant is a paste sealant or a hot melt sealant.
Further preferably, the flexible sealant is a polyurethane sealant, a silicone sealant, for example.
Further, the dense filler is high-strength shrinkage-free cement mortar or ultrahigh-performance concrete.
Furthermore, a slurry outlet and a slurry pressing port are formed in the metal corrugated pipe, and after the main ribs are inserted into the metal corrugated pipe, the compact filler is pressed in through the slurry outlet and the slurry pressing port.
Further preferably, the sleeve may partially extend to the outside of the metal bellows to the pier plastic hinge region. And the main reinforcement in the plastic hinge area of the pier is subjected to non-bonding treatment, so that the damage condition of concrete in the plastic hinge area is reduced.
Furthermore, spring clamps are arranged at two ends of the sleeve, so that the sleeve is positioned on the main rib. The spring clamp is made by wrapping a layer of anti-skidding rubber layer outside the spring steel wire, and cuts off the straight line segment after the sleeve is positioned, so that the main reinforcement can enter the metal corrugated pipe conveniently.
Furthermore, the length of the anchor section of the main rib is not suitable to be less than 24 times of the diameter of the main rib, and the inner diameter of the metal corrugated pipe is preferably 40mm larger than the diameter of the main rib.
Furthermore, the inner diameter of the sleeve is slightly larger than the maximum diameter of the main rib, the length can be determined according to design requirements, and the manufacturing material can be steel or plastic.
Further, the metal corrugated pipe can be a steel strip corrugated pipe, a galvanized metal corrugated pipe or a steel pipe pressed corrugated pipe.
The utility model discloses part unbonded grout bellows prefabrication assembles connection structure's construction method, including following step:
s1: coating anti-corrosion lubricating grease on the preset position of the processed main rib, sleeving a sleeve with a corresponding length outside, performing water seal treatment on two ends of the sleeve by using flexible sealant, and fixing the sleeve by using a spring clamp;
s2: processing stirrups and binding a pier reinforcement cage, erecting a formwork and pouring pier concrete, maintaining for 15-35 days, pouring a bearing platform of a pre-embedded metal corrugated pipe, and splicing the bearing platform and a pile foundation;
s3: and hoisting the bridge pier above the bearing platform, inserting the main bridge pier ribs into the embedded metal corrugated pipes and centering, finally grouting into the metal corrugated pipes, and completing the assembly of the bridge pier and the capping beam for the frame pier or the bent frame pier.
Compared with the prior art, the utility model discloses following technical advantage has:
1) under the effect of earthquake power, pier bottom and double column mound, framed bent pier mound top forms the plasticity hinge, pier and cushion cap, pier and bent cap junction seam open gradually, the pier owner muscle that traditional grout corrugated metal pipe connects reaches the yield rapidly, and main muscle is broken or core concrete conquassation appears along with the increase of horizontal force, and this technical scheme is because main muscle sets up behind the unbonded section, the reinforcing bar distributes comparatively evenly in this region meeting an emergency, the stress concentration of seam crossing has been alleviated, and the yield length extension of main muscle, therefore have better ductility performance and power consumption ability, the existence of unbonded section simultaneously can also reduce the main muscle percentage of strain in this region, the main muscle risk of taking place fatigue failure has been reduced.
2) The utility model discloses a main muscle to in the corrugated metal pipe sets up the unbonded section, not only can improve the ductility performance and the power consumption ability of pier, improves main muscle fatigue performance, and the work progress is simple simultaneously, easily operates, and economic nature is strong, facilitate promotion and application.
Drawings
Fig. 1 is a schematic structural view of the single-column pier and bearing platform junction of the present invention.
Fig. 2 is a cross-sectional view of a pier section i-i.
FIG. 3 is a sectional view of the top surface II-II of the platform.
Fig. 4 is a detailed view of a partially unbonded grouted bellows construction.
Fig. 5 is a structural view of arrangement of spring clips at two ends of a sleeve.
Reference numbers in the figures: the structure comprises a main rib 1, a sleeve 2, a metal corrugated pipe 3, a stirrup 4, a pier 5, a bearing platform 6, a spring clamp 7, a main rib unbonded section 8 and a main rib bonded section 9.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
Examples
In the embodiment of the present invention, the preparation before construction is: and cleaning the construction site according to a design drawing, and organizing construction materials, machinery and personnel in place.
The utility model discloses connection structure is assembled in prefabrication of part unbonded grout bellows in the middle of, including main muscle 1, corrugated metal pipe 3 and sleeve pipe 2, refer to figure 1. This embodiment not only can improve the ductility ability and the power consumption ability of pier through setting up the unbonded section to the main muscle in the corrugated metal pipe, improves main muscle fatigue performance, and the simultaneous working process is simple, easily operates, and economic nature is strong, facilitate promotion and application.
One end of the main reinforcement 1 is anchored in the bearing platform or the cover beam. The metal corrugated pipe 3 is pre-embedded in a bearing platform or a cover beam, and dense filler is filled in the metal corrugated pipe 3 to realize anchoring connection with the main bar 1. When the concrete material is selected, the dense filler is high-strength non-shrinkage cement mortar or ultrahigh-performance concrete. The metal corrugated pipe 3 is provided with a slurry outlet and a slurry pressing port, and the main rib 1 is inserted into the metal corrugated pipe 3 and then is pressed in through the slurry outlet and the slurry pressing port to realize the pressing-in of the dense filler. When the type is selected specifically, the length of the anchoring section of the main rib 1 is not smaller than 24 times of the diameter of the main rib, and the inner diameter of the metal corrugated pipe is 40mm larger than the diameter of the main rib. The length of the main rib unbonded section 8 is 8-10 times of the diameter of the main rib 1. The main rib unbonded section 8 is coated with an anticorrosion lubricating grease layer, so that the unbonded performance is improved, and the anticorrosion performance is improved. In specific implementation, flexible sealant is arranged on the inner walls of the two ends of the casing 2 to form water seal structures at the two ends. The flexible sealant is paste sealant or hot melt sealant, such as polyurethane sealant or silicone sealant. The metal corrugated pipe 3 may be a steel strip corrugated pipe, a galvanized metal corrugated pipe or a steel pipe pressed corrugated pipe.
2 covers of sleeve pipe are located on the main muscle 1, 5 hoist and mount in-process of pier, main muscle 1 inserts corrugated metal pipe 3, 2 whole are located corrugated metal pipe 3 or the part extends to corrugated metal pipe 3 outsidely, 5 hoist and mount of pier are accomplished back main muscle unbonded section 8 and are in near seam crossing to this constitutes main muscle unbonded section 8 on main muscle 1, see figure 4, make near seam crossing main muscle 1 meet an emergency evenly distributed, 2 parts of sleeve pipe extend to 3 outsides of corrugated metal pipe to pier plasticity hinge district, do not bondless processing to pier plasticity hinge district main muscle, alleviate the damage condition of plasticity hinge district concrete. The sleeve 2 is provided with spring clips 7 at both ends, see fig. 5, to position the sleeve 2 on the main bar 1. The spring clamp 7 is made by wrapping a layer of anti-slip rubber layer outside the spring steel wire, and cuts off the straight line segment after the positioning of the sleeve is finished, so that the main reinforcement can enter the metal corrugated pipe conveniently. When the type is specifically selected, the inner diameter of the sleeve 2 is slightly larger than the maximum diameter of the main reinforcement 1, the length can be determined according to design requirements, and the manufacturing material can be steel or plastic.
In the embodiment of the present invention, the stirrup 4 is a hot-rolled ribbed steel bar, and the end of the stirrup is made into a 135-degree hook.
The construction method of the prefabricated assembling connection structure of the partial unbonded grouting corrugated pipe in the embodiment comprises the following steps:
s1: coating anti-corrosion lubricating grease on the preset position of the processed main rib 1, coating a sleeve 2 with a corresponding length outside, performing water sealing treatment on two ends of the sleeve 2 by using flexible sealant, and fixing the sleeve 2 by using a spring clamp 7;
s2: processing stirrups 4 and binding a reinforcement cage of a pier 5, referring to fig. 2 and fig. 3, pouring concrete of the pier 5 by a formwork to form a main reinforcement bonding section 9, maintaining for 15-35 days, pouring a bearing platform 6 with a metal corrugated pipe 3 embedded, and assembling the bearing platform 6 with a pile foundation;
s3: and hoisting the pier 5 above the bearing platform 6, inserting the main pier rib 1 into the embedded metal corrugated pipe 3 and centering, and finally grouting into the metal corrugated pipe 3 to assemble the pier and the capping beam for the frame pier or the bent frame pier.
Under the effect of earthquake power, pier bottom and double column mound, framed bent pier mound top forms the plasticity hinge, pier and cushion cap, pier and bent cap junction seam open gradually, the pier owner muscle that traditional grout corrugated metal pipe connects reaches the yield rapidly, and main muscle is broken or core concrete conquassation appears along with the increase of horizontal force, and this technical scheme is because main muscle sets up behind the unbonded section, the reinforcing bar distributes comparatively evenly in this region meeting an emergency, the stress concentration of seam crossing has been alleviated, and the yield length extension of main muscle, therefore have better ductility performance and power consumption ability, the existence of unbonded section simultaneously can also reduce the main muscle percentage of strain in this region, the main muscle risk of taking place fatigue failure has been reduced.
The embodiments described above are intended to facilitate the understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention according to the disclosure of the present invention.
Claims (10)
1. The utility model provides a connection structure is assembled in prefabrication of part unbonded grout bellows which characterized in that includes:
the end part of the main pier rib (1) is anchored in the bearing platform or the capping beam;
the metal corrugated pipe (3) is embedded in the bearing platform or the cover beam, and dense fillers are filled in the metal corrugated pipe (3) in a pressing mode to realize anchoring connection with the main ribs (1);
sleeve pipe (2), the cover is located on main muscle (1), pier (5) hoist and mount in-process, main muscle (1) are inserted corrugated metal pipe (3), sleeve pipe (2) are all located corrugated metal pipe (3) or the part extends to pier (5) plasticity hinge district, and main muscle unbonded area (8) are in near seam crossing after pier (5) hoist and mount are accomplished to this constitutes main muscle unbonded area (8) on main muscle (1) for near main muscle (1) of seam crossing meet an emergency evenly distributed.
2. The partially unbonded grouting corrugated pipe prefabrication and assembly connecting structure of claim 1, wherein the length of the main rib unbonded section (8) is 8-10 times of the diameter of the main rib (1).
3. The prefabricated assembly connecting structure of the partially unbonded grouting corrugated pipe as claimed in claim 1, wherein the main rib unbonded section (8) is coated with an anticorrosive grease layer.
4. The partially unbonded grouting corrugated pipe prefabrication and assembly connecting structure as claimed in claim 1, wherein flexible sealant is arranged on the inner walls of the two ends of the sleeve (2) to form water sealing structures at the two ends.
5. The partially unbonded grouting corrugated pipe prefabrication and assembly connecting structure as claimed in claim 4, wherein the flexible sealant is a paste sealant or a hot-melt sealant.
6. The partially unbonded grouting corrugated pipe prefabrication and assembly connecting structure as claimed in claim 1, wherein the dense filler is high-strength shrinkage-free cement mortar or ultrahigh-performance concrete.
7. The partially unbonded grouting corrugated pipe prefabrication and assembly connecting structure as claimed in claim 6, wherein a grout outlet and a grout pressing outlet are formed in the metal corrugated pipe (3), and after the main rib (1) is inserted into the metal corrugated pipe (3), the pressing-in of the dense filler is realized through the grout outlet and the grout pressing outlet.
8. The partially unbonded grouting corrugated pipe prefabrication and assembly connecting structure as claimed in claim 1, wherein the anchoring section length of the main pier rib (1) is not less than 24 times of the diameter of the main pier rib (1), and the inner diameter of the metal corrugated pipe is preferably 40mm larger than the diameter of the main pier rib (1).
9. The partially unbonded grouting corrugated pipe prefabrication and assembly connecting structure as claimed in claim 1, wherein spring clamps are arranged at two ends of the sleeve (2) to position the sleeve (2) on the main rib (1).
10. The partially unbonded grouting corrugated pipe prefabrication and assembly connection structure as claimed in claim 1, wherein the metal corrugated pipe (3) is one of a steel strip corrugated pipe, a galvanized metal corrugated pipe or a steel pipe pressed corrugated pipe.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022107315.XU CN212357961U (en) | 2020-09-23 | 2020-09-23 | Partially unbonded grouting corrugated pipe prefabrication, assembling and connecting structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022107315.XU CN212357961U (en) | 2020-09-23 | 2020-09-23 | Partially unbonded grouting corrugated pipe prefabrication, assembling and connecting structure |
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| CN212357961U true CN212357961U (en) | 2021-01-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116335017A (en) * | 2023-03-10 | 2023-06-27 | 天津大学 | Full-assembled bridge structure system of separated type swing bearing platform |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116335017A (en) * | 2023-03-10 | 2023-06-27 | 天津大学 | Full-assembled bridge structure system of separated type swing bearing platform |
| CN116335017B (en) * | 2023-03-10 | 2023-11-14 | 天津大学 | Full-assembled bridge structure system of separated type swing bearing platform |
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