CN212358032U - Cast-in-place bracket of big cantilever prestressing force bent cap - Google Patents
Cast-in-place bracket of big cantilever prestressing force bent cap Download PDFInfo
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- CN212358032U CN212358032U CN202021508938.1U CN202021508938U CN212358032U CN 212358032 U CN212358032 U CN 212358032U CN 202021508938 U CN202021508938 U CN 202021508938U CN 212358032 U CN212358032 U CN 212358032U
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Abstract
The utility model relates to a building engineering technical field, concretely relates to cast-in-place bracket of big cantilever prestressing force bent cap aims at solving because the bent cap cantilever is long, and total weight is big, and super high altitude operation in addition receives the wind-force influence great, and bracket bearing capacity can not guarantee, has the problem of potential safety hazard, and its technical essential lies in including setting up the triangular bracket on the relative both sides wall of pier stud, triangular bracket includes montant, horizontal pole and diagonal brace, the bottom fixedly connected with support piece of montant, support piece has the built-in fitting through bolt or flange joint, the built-in fitting include a plurality of set up in the inside embedded steel bar of pier stud, the relative one side of embedded steel bar is equipped with the bellows, wear to be equipped with the overlap joint muscle in the bellows, bellows and embedded steel bar parallel arrangement and both outside covers and are equipped with the. The utility model discloses all improve than current bracket structure rigidity, stability and security.
Description
Technical Field
The application relates to the technical field of constructional engineering, in particular to a cast-in-place bracket for a large cantilever prestress cover beam.
Background
The large cantilever prestressed capping beam is commonly used in municipal viaduct engineering, spans on municipal roads, and has the advantages of strong spanning capability, high construction speed, less road area occupation and the like. The large cantilever prestressed bent cap of the municipal elevated bridge is usually constructed by adopting a floor support method, and the floor support has relatively mature structural design and better stability.
High piers are often used for complex-terrain bridges in mountainous areas. The construction period of the high pier is long, and the risk is large. By using the advantages of the large cantilever prestressed capping beam for reference, the integral bridge pier top is also designed by the large cantilever prestressed capping beam at present in the construction of the bridge in the mountainous area, so that a pier body is shared by a left bridge and a right bridge of the bridge, the number of high piers is reduced, the construction period is shortened, and the construction cost is saved. But the construction can not be carried out by adopting a floor cast-in-place support method due to the restrictions of the mountainous terrain and the height of the pier body; in order to ensure the construction quality of the bent cap, a bracket method is usually adopted to finish pouring once.
In a traditional bent cap bracket, holes are generally preset on a pier body, and steel bars are penetrated into the holes to serve as bearing fulcrums, but the problem that concrete around the holes is not fully poured easily occurs, and a pier body structure is influenced to a certain extent; or the steel plate welding foundation bolts are embedded in the pier body, the brackets are welded on the steel plate, the triangular brackets are arranged on the brackets, the high-altitude welding quality is difficult to control, the bearing capacity of the brackets cannot be guaranteed, and the bent cap is long in cantilever and large in total weight, and the ultrahigh-altitude operation is greatly influenced by wind force and has great potential safety hazards.
SUMMERY OF THE UTILITY MODEL
The main aim at of this application provides a cast-in-place bracket of big cantilever prestressing force bent cap to solve because the bent cap cantilever is long, total weight is big, and the super high altitude operation in addition receives the wind-force to influence great, and bracket bearing capacity can not guarantee, has the problem of potential safety hazard.
The technical purpose of the application is realized by the following technical scheme:
the utility model provides a cast-in-place bracket of big cantilever prestressing force bent cap, is including setting up the V-bracket on the relative both sides wall of pier stud, the V-bracket includes montant, horizontal pole and diagonal brace, the bottom fixedly connected with support piece of montant, support piece has the built-in fitting through bolt or flange joint, the built-in fitting include a plurality of roots set up in the inside embedded steel bar of pier stud, the relative one side of embedded steel bar is equipped with the bellows, wear to be equipped with the overlap joint muscle in the bellows, bellows and embedded steel bar parallel arrangement and both outside covers are equipped with the strengthening rib.
Optionally, the distance between adjacent embedded steel bars is 2-3m, and regular triangles are arranged.
Optionally, one side of the corrugated pipe is provided with a grouting hole, and the other side of the corrugated pipe is provided with an exhaust hole, and the grouting hole and the exhaust hole extend out of the pier column through the PVC pipe.
Optionally, sealing rubber plugs are arranged at two ends of the corrugated pipe.
Optionally, the bellows is pressure-filled with a high-strength, non-shrink grout through a grout hole.
Optionally, the reinforcing rib is spiral, and the inner diameter of the spiral reinforcing rib is larger than the total outer diameter of the corrugated pipe and the embedded steel bars.
Optionally, the reinforcing rib is in a closed circular ring shape, and the inner diameter of the closed circular ring-shaped reinforcing rib is larger than the total outer diameter of the corrugated pipe and the embedded steel bars.
Optionally, the top of the vertical rod is connected with a horizontally arranged distribution beam through a flange, one side of the distribution beam is tightly attached to the side wall of the pier stud, the other side of the distribution beam is connected with one end of the cross rod through a pin shaft, and the distribution beam positioned on the two side walls of the pier stud is connected through a counter pull rod.
The utility model has the advantages that: install the embedded bar in advance in the pier shaft as the stiff end, secondly set up the bellows on one side of the embedded bar in the pier shaft relatively, insert the overlap joint muscle to fix in the bellows in order to form the integral joint construction of assembly, thereby set up the triangular bracket on the built-in fitting, can be more outstanding in the aspect of operability, stability, rigidity etc., simultaneously, with bellows and embedded bar parallel arrangement, the strengthening rib has been established to its outside cover, can retrain the horizontal rib slant extrusion taper wedge effect between the overlapped bar, prevent to cause the cracked development of vertical splitting.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, serve to provide a further understanding of the application and to enable other features, objects, and advantages of the application to be more apparent. The drawings and their description illustrate the embodiments of the invention and do not limit it. In the drawings:
FIG. 1 is a schematic structural diagram of a large cantilever prestressed capping beam cast-in-place bracket provided according to an embodiment of the application;
FIG. 2 is a cross-sectional view of an embedded part in a large cantilever prestressed capping beam cast-in-place bracket provided according to an embodiment of the application;
FIG. 3 is a partial structural schematic diagram of an embedded part in a large cantilever prestressed capping beam cast-in-place bracket provided according to an embodiment of the application;
fig. 4 is a partial structural schematic diagram of an embedded part in a large cantilever prestressed capping beam cast-in-place bracket provided according to another embodiment of the application.
In the figure, 01, pier stud; 1. a triangular bracket; 11. a vertical rod; 12. a cross bar; 13. a diagonal brace; 14. a support member; 2. embedding parts; 21. embedding reinforcing steel bars in advance; 22. a bellows; 221. grouting holes; 222. an exhaust hole; 223. sealing the rubber plug; 23. lapping ribs; 24. reinforcing ribs; 3. a distribution beam; 31. and (4) a pull rod.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In this application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.
Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.
In addition, the term "plurality" shall mean two as well as more than two.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
The utility model provides a cast-in-place bracket of big cantilever prestressing force bent cap, as shown in fig. 1 and fig. 2, including setting up triangular bracket 1 on the relative both sides wall of pier stud 01, triangular bracket 1 includes montant 11, horizontal pole 12 and diagonal brace 13, the bottom fixedly connected with support piece 14 of montant 11, support piece 14 has built-in fitting 2 through bolt or flange joint, built-in fitting 2 includes that a plurality of roots set up in the inside embedded bar 21 of pier stud 01, the relative one side of embedded bar 21 is equipped with bellows 22, wear to be equipped with overlap joint muscle 23 in the bellows 22, bellows 22 and embedded bar 21 parallel arrangement and both outside covers are equipped with strengthening rib 24. During construction, the embedded steel bars 21 are installed in the pier body 01 in advance to serve as fixed ends, then the corrugated pipes 22 are arranged in the pier body 01 opposite to one sides of the embedded steel bars 21, the lap-joint bars 23 are inserted and fixed in the corrugated pipes 22 to form an integral assembling type connecting structure, meanwhile, the corrugated pipes 22 and the embedded steel bars 21 are arranged in parallel, reinforcing ribs 24 are sleeved on the outer sides of the corrugated pipes 22 and can restrain the inclined extrusion conical wedge effect of transverse ribs among the lap-joint steel bars, the development of longitudinal split cracks is prevented, then the supporting pieces 14, the vertical bars 11, the horizontal bars 12 and the inclined supporting rods 13 are sequentially installed, the defect that concrete around holes is not full or the high-altitude welding quality is difficult to guarantee in the conventional method is overcome, the safety risk is reduced, the construction efficiency is improved, and the capping beam bracket is greatly improved in the aspects of bearing capacity. In the embodiment of the present invention, the distance between the adjacent embedded bars 21 is 2-3m, and regular triangles are arranged, so as to ensure the connection stability between the embedded part 2 and the supporting part 14.
In order to fill slurry into the corrugated pipe 22, as shown in fig. 2, a grouting hole 221 is formed in one side of the corrugated pipe 22, an exhaust hole 222 is formed in the other side of the corrugated pipe, the grouting hole 221 and the exhaust hole 222 both extend out of the pier body 01, grouting is performed through the grouting hole 221, while a grouting layer is filled, slurry overflows from the exhaust hole 222, namely the corrugated pipe 22 is filled with slurry, no disturbance is caused within twenty-four hours after grouting is completed, the exhaust hole 222 is finally blocked, the grouting hole 221 is then blocked, and it is ensured that the slurry in the corrugated pipe 22 is compact.
As shown in fig. 2, the high-strength non-shrinkage grouting material is poured into the corrugated pipe 2 through the grouting holes 221 under pressure, and is a dry mixture composed of cement as a basic material, appropriate fine aggregate, a small amount of additive and other materials, and is suitable for connecting reinforcing steel bars with different diameters, so that the indirect connection of reinforcing steel bar anchoring is realized through the setting and hardening of the grouting material, and the precast concrete members are connected into a whole structure.
In order to ensure that the grouting material in the corrugated pipe 22 is compact, as shown in fig. 2, sealing rubber plugs 223 are arranged at two ends of the corrugated pipe 22, the grouting holes 221 are connected with the PVC pipe to serve as a drainage channel of the grouting material, the grouting holes 221 are obliquely arranged towards the drainage channel, and the exhaust holes 222 are obliquely arranged back to the drainage channel, so that the hole forming quality can be improved, and the grouting material is easy to install on site.
As shown in fig. 3, the internal diameter of the reinforcing rib 24 is greater than the total external diameter of the corrugated pipe 22 and the embedded steel bar 21 so as to facilitate the sheathing, in this embodiment, the reinforcing rib 24 is a spiral spring stirrup, in other embodiments, refer to fig. 4, the reinforcing rib 24 is a closed circular hoop, corresponding transverse restraint is played to the embedded steel bar 21 and the lap joint bar 23 through the reinforcing rib 24, and the influence rule of the volume hoop ratio of the spiral lap joint bar on the lap joint length of the steel bar is established, so that the actual length of the reinforcing rib can be shortened. Meanwhile, according to the constraint action requirement of the lap joint of the grout anchor, the spiral space of the adaptive spring stirrup can be adjusted, the anti-seismic performance is guaranteed, and the anchoring length of the lap joint of the grout anchor is shortened.
As shown in fig. 1, the top of the vertical rod 11 is connected with a horizontally arranged distribution beam 3 through a flange, one side of the distribution beam 3 is tightly attached to the side wall of the pier stud 01, the other side of the distribution beam 3 is connected with one end of the cross rod 12 through a pin shaft, and the distribution beams 3 on the two side walls of the pier stud 01 are connected through a tie rod 31.
The working principle of the large cantilever prestressed bent cap cast-in-place bracket is as follows: the embedded steel bars 21 are arranged in the pier body 01, the diameter and the number of the embedded steel bars meet the requirement of the lap joint length, and the distance between the adjacent embedded steel bars 21 is 2-3m, and a regular triangle arrangement mode is adopted, then, a corrugated pipe 22 is embedded in one side of the pier body 01 opposite to the embedded steel bars 21, reinforcing ribs 23 are sleeved on the outer sides of the corrugated pipe 22 and the embedded steel bars 21, the corrugated pipe 22 is well combined with the peripheral pier body 01, then the overlapping ribs 23 are penetrated through sealing rubber plugs 223 arranged at two ends of the corrugated pipe 22, then, a PVC pipe is installed according to the position of a grouting hole 221 of the corrugated pipe 22, high-strength grouting material is used for grouting into the corrugated pipe 22, an assembled integral type connecting structure is formed after full grouting and hardening, then, a supporting piece 14, a vertical rod 11, a cross rod 12 and a diagonal brace 13 are sequentially installed to form the triangular bracket 1, and finally, the distribution beams 3 are fixed through flanges and are connected and fixed between the distribution beams 3 through a counter pull rod 31.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (8)
1. The utility model provides a cast-in-place bracket of big cantilever prestressing force bent cap, is including setting up triangular bracket (1) on pier stud (01) relative both sides wall, a serial communication port, triangular bracket (1) includes montant (11), horizontal pole (12) and diagonal brace (13), the bottom fixedly connected with support piece (14) of montant (11), there are built-in fitting (2) support piece (14) through bolt or flange joint, built-in fitting (2) including a plurality of roots set up in inside embedded steel bar (21) of pier stud (01), the relative one side of embedded steel bar (21) is equipped with bellows (22), wear to be equipped with overlap joint muscle (23) in bellows (22), bellows (22) and embedded steel bar (21) parallel arrangement and both outsides cover are equipped with strengthening rib (24).
2. The cast-in-place bracket for the large cantilever prestressed capping beam as claimed in claim 1, wherein the distance between adjacent embedded steel bars (21) is 2-3m, and the embedded steel bars are arranged in a regular triangle.
3. The cast-in-place bracket for the large cantilever prestressed capping beam as claimed in claim 1, wherein the corrugated pipe (22) is provided with a grouting hole (221) at one side and an exhaust hole (222) at the other side, and the grouting hole (221) and the exhaust hole (222) extend out of the pier stud (01) through PVC pipes.
4. A cast-in-situ bracket for large cantilever prestressed capping beam, according to claim 3, characterized in that sealing rubber plugs (223) are provided at both ends of the corrugated pipe (22).
5. A large cantilever prestressed capping beam cast-in-place carriage as claimed in claim 3, characterized in that the corrugated pipe (22) is pressure-filled with high strength, non-shrink grouting material through grouting holes (221).
6. The cast-in-place bracket for the large cantilever prestressed capping beam as claimed in claim 1, wherein the reinforcing rib (24) is spiral, and the inner diameter of the spiral reinforcing rib (24) is larger than the total outer diameter of the corrugated pipe (22) and the embedded steel bar (21).
7. The cast-in-place bracket for the large cantilever prestressed capping beam as claimed in claim 1, wherein the reinforcing rib (24) is in a closed circular ring shape, and the inner diameter of the closed circular ring-shaped reinforcing rib (24) is larger than the total outer diameter of the corrugated pipe (22) and the embedded steel bar (21).
8. The cast-in-place bracket for the large cantilever prestressed capping beam as claimed in claim 1, wherein the top of the vertical rod (11) is connected with a horizontally arranged distribution beam (3) through a flange, one side of the distribution beam (3) is tightly attached to the side wall of the pier column (01), the other side of the distribution beam is connected with one end of the cross rod (12) through a pin shaft, and the distribution beams (3) positioned on the two side walls of the pier column (01) are connected through a counter pull rod (31).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021508938.1U CN212358032U (en) | 2020-07-27 | 2020-07-27 | Cast-in-place bracket of big cantilever prestressing force bent cap |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021508938.1U CN212358032U (en) | 2020-07-27 | 2020-07-27 | Cast-in-place bracket of big cantilever prestressing force bent cap |
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| CN212358032U true CN212358032U (en) | 2021-01-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111778868A (en) * | 2020-07-27 | 2020-10-16 | 中交路桥建设有限公司 | Cast-in-place bracket of big cantilever prestressing force bent cap |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111778868A (en) * | 2020-07-27 | 2020-10-16 | 中交路桥建设有限公司 | Cast-in-place bracket of big cantilever prestressing force bent cap |
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