CN210975503U - Large-span prefabricated assembled bent cap and pier stand connection structure - Google Patents
Large-span prefabricated assembled bent cap and pier stand connection structure Download PDFInfo
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- CN210975503U CN210975503U CN201921471214.1U CN201921471214U CN210975503U CN 210975503 U CN210975503 U CN 210975503U CN 201921471214 U CN201921471214 U CN 201921471214U CN 210975503 U CN210975503 U CN 210975503U
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Abstract
The utility model relates to a large-span prefabricated assembled bent cap and pier stand connection structure, which comprises a stand column and a bent cap, wherein the stand column and the bent cap are respectively provided with a stand column embedded part and a bent cap embedded part, and self-compacting concrete is filled in a cavity enclosed by the stand column and the bent cap to form a connecting body during assembling; the upright post embedded part is fixed on the upright post main rib through a positioning rib, and the main rib penetrates through a main rib hole on the upright post embedded part and extends into the cavity; the diameter of the cavity is slightly smaller than that of the upright post, the top of the cavity is provided with a filling pipe and an exhaust hole, and the periphery of the cavity is provided with a bent cap embedded part; and welding the bent cap embedded part and the upright post embedded part. The utility model discloses an embedded part is connected stand and bent cap, and positioning accuracy is high, and joint strength is high, adopts U type prefab to pour concrete and stretch-draw prestressing tendons in turn, effectively reduces hoist and mount volume and weight to alleviate the influence of construction to peripheral traffic.
Description
Technical Field
The utility model relates to a city overpass bent cap construction especially relates to a prefabricated pin-connected panel bent cap of large-span and pier stand connection structure.
Background
The bridge capping beam is generally constructed by a bracket method, a template is erected at the upper part of a pier upright post to pour capping beam concrete, and the method has the following problems: 1. a large number of supports, templates and binding steel bars need to be erected on site; 2. the whole erection and member cast-in-place construction speed is low, the construction period is long, and the auxiliary road needs to be limited or closed to a certain extent, so that adverse effects are caused to ground traffic organizations; 3. the site requirement is high.
In order to overcome the defects of a bracket method, a construction method for on-site hoisting of a prefabricated bent cap can be adopted, the method is suitable for small and medium-sized bent caps, on-site hoisting operation of a large-span bent cap is difficult, accurate strength and accuracy of connection between the bent cap and a pier stand column are insufficient, construction efficiency is low, construction requirements are high, potential safety hazards exist, and therefore corresponding solutions need to be provided urgently.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an inefficiency, the not enough scheduling problem of accuracy that exist in the prefabricated pin-connected panel bent cap of large-span in current city and pier stand connection construction have provided a prefabricated pin-connected panel bent cap of large-span and pier stand connection structure, adopt following technical scheme.
The utility model relates to a prefabricated pin-connected panel bent cap of large-span and pier stand connection structure, including stand and bent cap, its characterized in that: the upright post and the bent cap are respectively provided with an upright post embedded part and a bent cap embedded part, and self-compacting concrete is poured into a cavity enclosed by the upright post and the bent cap to form a connecting body during assembly; the upright post embedded part is fixed on the upright post main rib through a positioning rib, and the main rib penetrates through a main rib hole on the upright post embedded part and extends into the cavity; the diameter of the cavity is slightly smaller than that of the upright post, the top of the cavity is provided with a filling pipe and an exhaust hole, and the periphery of the cavity is provided with a bent cap embedded part; and the bent cap embedded parts are welded with the upright post embedded parts.
Preferably, the column embedded part is welded by a circular ring supporting plate and a column body of the column, a plurality of special-shaped stiffening plates are uniformly welded along the junction, and studs are uniformly arranged on the inner side and the outer side of the column body and the upper side and the lower side of the circular ring supporting plate and can increase the connection strength between the embedded part and the column.
Preferably, the cross section of the special-shaped stiffening plate is formed by splicing an upper rectangle and a lower triangle, and the special-shaped stiffening plate can be placed in the stirrups without influencing the spacing of the stirrups.
Preferably, the bent cap embedded part is formed by welding a bent cap barrel body on the upper side of the inner ring of the circular ring base plate, a positioning ring is welded on the lower side of the outer ring of the circular ring base plate, a plurality of triangular stiffening plates are uniformly welded at the junction of the circular ring base plate and the bent cap barrel body, studs are uniformly arranged on the inner side and the outer side of the bent cap barrel body and on the upper side and the lower side of the circular ring base plate, and the studs can enhance the connection strength of the embedded part and the bent cap.
Preferably, the inner diameter of the positioning ring on the bent cap embedded part is 2mm larger than the outer diameter of the circular ring supporting plate on the upright post embedded part, so that the mounting accuracy can be improved.
Preferably, the diameter of a main rib hole on the upright post embedded part is 3-5 mm larger than that of an upright post main rib, and a gap between the main rib and the main rib hole is coated with structural adhesive.
Preferably, the filling pipe is inserted into a cavity defined by the upright post embedded part and the cover beam embedded part, the bottom end of the filling pipe is 5cm away from the bottom of the cavity and is used for filling self-compacting concrete, and air is exhausted through the exhaust holes synchronously in the filling process.
The utility model has the advantages that:
1. the upright post embedded parts and the bent cap embedded parts are fixed through the studs, the positioning ribs and the like, and the embedded parts are high in connection strength with the upright posts and the bent caps.
2. The capping beam embedded parts are provided with positioning rings with diameters slightly larger than those between the support embedded parts, the capping beam can be quickly positioned during hoisting, the installation speed is high, and the construction efficiency is high.
3. The main reinforcement of the upright column extends into the bent cap support, self-compacting concrete is poured in the hollow part, and the connecting strength of the upright column and the bent cap is high.
4. The bent cap can adopt a prefabricated U-shaped component, concrete is poured on the U-shaped component, the hoisting volume and weight can be effectively reduced, and the workload of formwork erection and concrete pouring is reduced.
5. By adopting the large-span prefabricated assembled capping beam construction, the closed ground traffic is changed into the ground traffic without influence basically during the construction, and the influence of the construction on the peripheral traffic can be relieved.
Drawings
FIG. 1 is a schematic view of a connection structure of a large-span prefabricated assembled capping beam and a pier column;
FIG. 2 is a schematic view of a cap embedment configuration;
FIG. 3 is a top view of a cap embedment;
FIG. 4 is a schematic view of a stud embedment configuration;
FIG. 5 is a top view of a stud embedment;
FIG. 6 is a schematic structural view of a large-span prefabricated assembled bent cap;
FIG. 7 is a schematic cross-sectional view of the capping beam support;
FIG. 8 is a schematic mid-span cross-sectional view of a cap spar;
fig. 9 is a schematic view of a construction platform structure.
The figure is marked with: 1-upright post, 2-main reinforcement, 3-stirrup, 4-positioning reinforcement, 5-upright post embedded part, 51-circular ring supporting plate, 52-special-shaped stiffening plate, 53-upright post barrel, 54-main reinforcement hole, 6-stud, 7-capping beam, 8-vent hole, 9-pouring pipe, 10-self-compacting concrete, 11-capping beam embedded part, 111-circular ring bottom plate, 112-triangular stiffening plate, 113-capping beam barrel, 114-positioning ring, 12-concrete interface, 13-first prestressed reinforcement, 14-second prestressed reinforcement, 15-cast-in-place concrete, 16-diagonal brace, 17-panel, 18-railing, 19-connecting steel plate, 20-main beam and 21-secondary beam.
Detailed Description
In order to deepen understanding of the present invention, the embodiments of the present invention will be described in detail below with reference to fig. 1 to 9, and the following embodiments are implemented on the premise of the technical solution of the present invention, and detailed embodiments are given, but the scope of protection of the present invention is not limited to the following embodiments.
Combine the attached drawing 1 to show, the utility model relates to a prefabricated pin-connected panel bent cap of large-span and pier stand connection structure, including stand 1 and bent cap 7, set up stand built-in fitting 5 and bent cap built-in fitting 11 on stand 1 and the bent cap 7 respectively, pour into self-compaction concrete 10 in the cavity that closes when assembling the two and form the connector.
With reference to the attached drawings 1, 4 and 5, an upright post embedded part 5 is fixed on an upright post main rib 2 through a positioning rib 4, the main rib 2 penetrates through a main rib hole 54 in the upright post embedded part 5 and extends into the cavity, the diameter of the main rib hole 54 is 3-5 mm larger than that of the main rib 2 of the upright post 1, and a gap between the main rib 2 and the main rib hole 54 is coated with structural adhesive; the diameter of the cavity is slightly smaller than that of the upright post 1, the top of the cavity is provided with a filling pipe 9 and an exhaust hole 8, the filling pipe 9 is inserted into the cavity formed by enclosing the upright post embedded part 5 and the bent cap embedded part 11, the bottom end of the filling pipe 9 is 5cm away from the bottom of the cavity, and the periphery of the filling pipe is provided with the bent cap embedded part 11; the column embedded part 5 is welded by a circular ring supporting plate 51 and a column barrel body 53, a plurality of special-shaped stiffening plates 52 are evenly welded along the junction, the cross section of each special-shaped stiffening plate 52 is in a shape formed by splicing an upper rectangle and a lower triangle, and studs 6 are evenly arranged on the inner side and the outer side of the column barrel body 53 and the upper side and the lower side of the circular ring supporting plate 51.
Referring to fig. 1, 2 and 3, the bent cap embedded part 11 is welded to the column embedded part 5, the bent cap embedded part 11 is formed by welding a bent cap barrel 113 on the upper side of the inner ring of a circular ring base plate 111, a positioning ring 114 is welded on the lower side of the outer ring of the circular ring base plate 111, the inner diameter of the positioning ring 114 is 2mm larger than the outer diameter of a circular ring supporting plate 51 on the column embedded part 5, a plurality of triangular stiffening plates 112 are uniformly welded along the junction of the circular ring base plate 111 and the bent cap barrel 113, and studs 6 are uniformly arranged on the inner side and the outer side of the bent cap barrel 113 and on the upper side and the lower side of.
Combine that 6, 7, 8 are shown in the attached drawing, large-span bent cap 7 has different cross sectional shape in striding with support department, be equipped with the changeover portion between support cross section and the midspan cross section, be equipped with first batch prestressing tendons 13 and the prestressing tendons 14 of second batch in the bent cap 7, first batch prestressing tendons 13 sets up in prefabricated U type roof beam, and the connection between bent cap 7 and the pier stand 1 adopts the utility model relates to a connection structure connects.
Referring to fig. 9, two sides of the U-shaped prefabricated member of the bent cap 7 are respectively provided with a connecting steel plate 19 from top to bottom, two sides of each connecting steel plate 19 are welded with a main beam 20, a secondary beam 21 and a panel 17 are sequentially arranged on each main beam 20 from bottom to top, a rail 18 is arranged on the outer side of each panel 17, the center of each U-shaped member is constructed by cast-in-place concrete 15, a concrete interface 12 is arranged between each cast-in-place concrete 15 and the U-shaped beam, and a second set of prestressed ribs 14 are arranged in the middle of each cast.
The construction steps of the large-span prefabricated assembled bent cap and pier column connecting structure in the embodiment comprise:
s1, prefabricating a U-shaped beam: a U-shaped beam is prefabricated in a factory, a prestressed steel strand pipeline is pre-buried in the U-shaped beam, a bent cap embedded part 11 is installed on the cross section of a bent cap 7 support, concrete is poured and maintenance is carried out.
S2, construction of the pier column 1: the method comprises the steps of binding a main reinforcement 2 and a stirrup 3 to a pier upright post 1, installing an upright post embedded part 5 on the top end of the upright post 1 through a positioning reinforcement 4, enabling the main reinforcement 2 to penetrate through the upright post embedded part 5, connecting a gap between the main reinforcement 2 and the upright post embedded part 5 by adopting structural adhesive, pouring concrete and maintaining.
S3, tensioning the first prestressed tendons 13: and installing a first group of prestressed tendons 13, symmetrically tensioning, and performing vacuum grouting treatment on the prestressed duct after tensioning is finished.
S4, hoisting a large-span U-shaped beam: symmetrically hoisting the large-span U-shaped beam onto the upright post 1, aligning and placing the upright post embedded parts 5 and the bent cap embedded parts 11, welding the two circular embedded parts along the periphery, and smearing antirust paint.
S5, pouring the self-compacting concrete 10: the self-compacting concrete 10 is poured through the pouring pipe 9 and cured.
S6, building a construction platform: through the connection steel plate 19, at U type roof beam both sides welding girder 20, from the bottom up is equipped with secondary beam 21 and panel 17 in proper order on girder 20, and the panel 17 outside is equipped with railing 18.
S7, construction of a U-shaped beam and beam groove: pre-burying a prestressed pipeline in the U-shaped beam groove, and performing concrete pouring, vibrating and curing on the U-shaped beam groove; and (5) when the strength of the concrete reaches 75% of the design value, carrying out tensioning and grouting treatment on the second batch of prestressed tendons 14.
S8, subsequent construction: and removing the tensioning equipment, chiseling the concrete at the tensioning end, performing waterproof treatment on a joint between the anchor ring and the anchor backing plate, pouring anchor sealing concrete, and removing the construction platform on the U-shaped beam.
The above embodiments are only used for explaining the technical idea of the present invention, not for the limitation of the protection of the right of the present invention, and all the modifications that are insubstantial to the present invention are carried out by using this idea, all fall into the protection scope of the present invention.
Claims (7)
1. Large-span prefabricated pin-connected panel bent cap and pier stand connection structure, including stand (1) and bent cap (7), its characterized in that: the upright post (1) and the bent cap (7) are respectively provided with an upright post embedded part (5) and a bent cap embedded part (11), and self-compacting concrete (10) is poured into a cavity enclosed by the upright post embedded part and the bent cap embedded part to form a connecting body during assembly; the upright post embedded part (5) is fixed on the upright post main rib (2) through a positioning rib (4), and the main rib (2) penetrates through a main rib hole (54) in the upright post embedded part (5) and extends into the cavity; the diameter of the cavity is slightly smaller than that of the upright post (1), the top of the cavity is provided with a filling pipe (9) and an exhaust hole (8), and the periphery of the cavity is provided with a bent cap embedded part (11); and the bent cap embedded parts (11) are welded with the upright post embedded parts (5).
2. The large-span prefabricated assembled capping beam and pier column connection structure of claim 1, characterized in that: the column embedded part (5) is welded with a column body (53) by a circular ring supporting plate (51), a plurality of special-shaped stiffening plates (52) are uniformly welded along the junction, and studs (6) are uniformly arranged on the inner side and the outer side of the column body (53) and the upper side and the lower side of the circular ring supporting plate (51).
3. The large-span prefabricated assembled capping beam and pier column connection structure of claim 2, wherein: the cross section of the special-shaped stiffening plate (52) is formed by splicing an upper rectangle and a lower triangle.
4. The large-span prefabricated assembled capping beam and pier column connection structure of claim 1, characterized in that: the bent cap embedded part (11) is formed by welding a bent cap barrel body (113) on the upper side of an inner ring of a circular ring base plate (111), a positioning ring (114) is welded on the lower side of an outer ring of the circular ring base plate (111), a plurality of triangular stiffening plates (112) are uniformly welded along the junction of the circular ring base plate (111) and the bent cap barrel body (113), and studs (6) are uniformly arranged on the inner side and the outer side of the bent cap barrel body (113) and the upper side and the lower side of the circular ring base plate (111).
5. The large-span prefabricated assembled capping beam and pier column connection structure of claim 1, characterized in that: the inner diameter of the positioning ring (114) on the bent cap embedded part (11) is 2mm larger than the outer diameter of the circular ring supporting plate (51) on the upright post embedded part (5).
6. The large-span prefabricated assembled capping beam and pier column connection structure of claim 1, characterized in that: the diameter of a main rib hole (54) in the upright post embedded part (5) is 3-5 mm larger than that of a main rib (2) in the upright post (1), and structural glue is coated in a gap between the main rib (2) and the main rib hole (54).
7. The large-span prefabricated assembled capping beam and pier column connection structure of claim 1, characterized in that: the pouring pipe (9) is inserted into a cavity formed by enclosing the upright post embedded part (5) and the bent cap embedded part (11), and the bottom end of the pouring pipe (9) is 5cm away from the bottom of the cavity.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921471214.1U CN210975503U (en) | 2019-09-05 | 2019-09-05 | Large-span prefabricated assembled bent cap and pier stand connection structure |
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| CN201921471214.1U CN210975503U (en) | 2019-09-05 | 2019-09-05 | Large-span prefabricated assembled bent cap and pier stand connection structure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112030720A (en) * | 2020-08-21 | 2020-12-04 | 中交第二公路勘察设计研究院有限公司 | Prefabricated bent cap and pier stud socket type connecting structure and construction method |
| CN112906700A (en) * | 2021-01-15 | 2021-06-04 | 重庆交通大学 | Self-compacting concrete image semantic segmentation method and device and data set generation method |
| CN113356030A (en) * | 2021-06-30 | 2021-09-07 | 上海市政工程设计研究总院（集团）有限公司 | Prefabricated steel-concrete combined capping beam and construction method thereof |
-
2019
- 2019-09-05 CN CN201921471214.1U patent/CN210975503U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112030720A (en) * | 2020-08-21 | 2020-12-04 | 中交第二公路勘察设计研究院有限公司 | Prefabricated bent cap and pier stud socket type connecting structure and construction method |
| CN112906700A (en) * | 2021-01-15 | 2021-06-04 | 重庆交通大学 | Self-compacting concrete image semantic segmentation method and device and data set generation method |
| CN112906700B (en) * | 2021-01-15 | 2022-10-21 | 重庆交通大学 | Self-compacting concrete image semantic segmentation method and device and data set generation method |
| CN113356030A (en) * | 2021-06-30 | 2021-09-07 | 上海市政工程设计研究总院（集团）有限公司 | Prefabricated steel-concrete combined capping beam and construction method thereof |
| CN113356030B (en) * | 2021-06-30 | 2023-01-10 | 上海市政工程设计研究总院（集团）有限公司 | Prefabricated steel-concrete combined capping beam and construction method thereof |
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