CN112095441B

CN112095441B - Construction process for connecting assembled reinforced concrete bridge pier column and capping beam

Info

Publication number: CN112095441B
Application number: CN202010810446.6A
Authority: CN
Inventors: 吴发红; 支正东; 朱华; 赵乙丁; 朱广富
Original assignee: Yancheng Institute of Technology
Current assignee: Yancheng Institute of Technology
Priority date: 2020-08-13
Filing date: 2020-08-13
Publication date: 2022-01-28
Anticipated expiration: 2040-08-13
Also published as: CN112095441A

Abstract

The invention provides a construction process for connecting an assembled reinforced concrete bridge pier stud with a capping beam, which comprises the following steps: and (3) prefabricating a cover beam with a concave cavity in the connecting hole: placing a mould in the bent cap reinforcement cage to form a connecting hole with a concave cavity after the cast concrete bent cap is cast, wherein the concave cavity radially extends along the circumferential surface of the connecting hole; the mold comprises a hollow sleeve and a rubber cylinder, and a wedge-shaped lug matched with the hollow part of the hollow sleeve is arranged on the whole body of the rubber cylinder; after the bent cap is poured, the rubber cylinder is taken out, so that the concave cavity is formed in the connecting hole of the bent cap; pouring the joint of the integrated bent cap and the pier stud: and hoisting the bent cap to enable a plurality of main ribs of the pier stud extending out of the top surface to be correspondingly inserted into a plurality of connecting holes of the bent cap, and then grouting and pouring in the connecting holes to finish the connection of the bent cap and the pier stud. By adopting the construction process, the bonding performance is better, so that the connection integral performance of the pier stud main reinforcement and the bent cap is better.

Description

Construction process for connecting assembled reinforced concrete bridge pier column and capping beam

Technical Field

The invention relates to the technical field of construction of an assembled RC structure, in particular to a connection construction process of main reinforcements and capping beams of an assembled reinforced concrete bridge pier stud.

Background

The reinforced concrete structure adopts a prefabricated construction mode, so that the site construction labor force can be greatly reduced, the construction speed is improved, the construction period is shortened, and the method has the advantages of easiness in ensuring the component quality, energy conservation, environmental protection and the like, accords with the development direction of building industrialization, and is a construction mode for buildings such as houses, municipal bridges and the like which are widely popularized in China at present.

The connecting technology of the main reinforcement of the prefabricated pier column of the prefabricated reinforced concrete bridge and the prefabricated capping beam is one of key technologies in the construction technology of the prefabricated bridge, and the connecting quality of the main reinforcement of the prefabricated pier column and the prefabricated capping beam directly influences the anti-seismic performance of the structure, so that the connecting technology is the important factor in each technology of the construction mode.

At present, the connection technology of main reinforcements of prefabricated pier columns of prefabricated reinforced concrete bridges and prefabricated bent caps in China mainly adopts grouting corrugated sleeve connection technology, and the technology mainly increases the bonding between the sleeves and the surrounding concrete by small-amplitude concave-convex parts of the peripheries of the corrugated sleeves in the use process, so that the diameter and the length of the sleeves need to be determined by a construction site test (according to the characteristics of the site concrete) to prevent the sleeves and slurry in the sleeves from being integrally pulled out of the bent caps.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a construction process for connecting a main pier stud rib and a cover beam of an assembled reinforced concrete bridge, which has better connection performance, is simple and easy to implement, so that the connection between the main pier stud rib and the cover beam cannot be caused by the situation that the sleeve and slurry in the sleeve are integrally pulled out of the cover beam concrete.

In order to solve the technical problems, the technical scheme of the invention is as follows:

the utility model provides a construction technology that assembled reinforced concrete bridge pier stud is connected with bent cap which characterized in that: the method comprises the following steps:

and (3) prefabricating a cover beam with a concave cavity in the connecting hole: placing a mould in the bent cap reinforcement cage to form a connecting hole with a concave cavity after the cast concrete bent cap is cast, wherein the concave cavity radially extends along the circumferential surface of the connecting hole; the mold comprises a hollow sleeve and a rubber cylinder, and a wedge-shaped lug matched with the hollow part of the hollow sleeve is arranged on the whole body of the rubber cylinder; after the bent cap is poured, the rubber cylinder is taken out, so that the concave cavity is formed in the connecting hole of the bent cap;

pouring the joint of the integrated bent cap and the pier stud: and hoisting the bent cap to enable a plurality of main ribs of the pier stud extending out of the top surface to be correspondingly inserted into a plurality of connecting holes of the bent cap, and then grouting and pouring in the connecting holes to finish the connection of the bent cap and the pier stud.

And grouting from the grouting guide pipe opening, stopping grouting after slurry flows out of the slurry outlet guide pipe, and then plugging the grouting guide pipe and the slurry outlet guide pipe opening by using a rubber plug to finish the connection work of the cover beam and the pier stud.

When the bent cap is poured, a support is arranged in the rubber cylinder.

The support comprises 1 shaft, 3 supporting plates, a plurality of supporting rods, a plurality of hinges and 1 supporting plate; the supporting plates are parallel to the shaft and are hinged through a plurality of supporting rods, and the bottommost row of supporting rods are arranged at the lower ends of the supporting plates; the supporting plate is fixed at the lower part of the shaft and is tightly attached to the bottom row of supporting rods; the bottom row of support rods and the support plate are provided with corresponding bolt holes.

The supporting plates are parallel to the shaft and hinged through a plurality of supporting rods, and a certain distance is reserved between the 3 supporting plates, so that the 3 supporting plates can be retracted after moving relatively in the axial direction.

The whole special support becomes a geometric invariant system after the supporting plate and the bottommost row of supporting rods of the special support are connected by adopting bolt tightening. In addition, the supporting plate can prevent cement mortar from flowing into the inner cavity of the soft rubber cylinder during concrete pouring.

The invention has the advantages that:

compared with the similar technology, the construction process has the advantages that the manufactured grouting space is zigzag, the grouting material in the zigzag space can be directly bonded with the capping beam concrete, the bonding performance is better, and the sleeve and the whole slurry in the sleeve can not be pulled out of the capping beam concrete, so that the integral connection performance of the pier column main rib and the capping beam is better.

Drawings

FIG. 1 is a schematic view of a hollow sleeve of a soft rubber plug of the present invention.

FIG. 2 is a schematic sectional view of the present invention at 1-1.

Figure 3 is a top view of the dedicated support of the present invention.

Fig. 4 is a bottom view of the inventive customized support.

Fig. 5 is a schematic sectional view 2-2 of the present invention.

Fig. 6 is a schematic view of the pier stud and cap beam connection of the present invention.

In the upper diagram: 1. hollowing out the sleeve; 2. A soft rubber cylinder; 3. a wedge-shaped projection; 4. grouting a conduit; 5. a slurry outlet conduit; 6. a support plate; 7. a support bar; 8. hinging; 9. a support plate; 10. a shaft; 11. a bolt; 12. a capping beam; 13. grouting space; 14. pier column longitudinal steel bars; 15. and (5) pier studs.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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 invention.

Referring to fig. 1-6, the construction process for connecting the main reinforcement and the bent cap of the assembled reinforced concrete bridge pier stud of the invention is used for realizing the connection between the assembled reinforced concrete bridge pier stud 15 and the bent cap 12, wherein the prefabricated pier stud consists of a concrete column body and a plurality of pier stud longitudinal reinforcements 14 poured in the concrete column body, and the upper end parts of the pier stud longitudinal reinforcements 14 extend out of the top surface of the concrete column body; a plurality of grouting spaces 13 corresponding to the longitudinal reinforcements of the pier stud are arranged in the prefabricated capping beam 12. During on-site construction, the parts of the longitudinal steel bars 14 of the pier stud extending out of the top surface of the concrete column body are correspondingly inserted into the grouting spaces 13, then grouting is performed in the grouting spaces 13, and the connection between the prefabricated pier stud and the prefabricated capping beam is completed.

The construction process specifically comprises the following steps:

s1: the soft rubber cylinder 2 is plugged into the hollow sleeve 1, so that the wedge-shaped convex blocks protrude out of the circumferential surface of the hollow sleeve 1. The hollow sleeve 1 is characterized in that the upper opening is closed, and a plurality of regular square holes are formed in the whole body. The soft rubber cylinder 2 is characterized by being provided with a cavity, and wedge-shaped convex blocks 3 matched with square holes on the whole body of the hollow sleeve 1 are arranged on the whole body.

S2: the special support is folded, the special support is plugged into the cavity of the soft rubber cylinder 2 and then is unfolded, so that the support rods 7 at the bottom are tightly attached to the supporting plate 9, and finally the bolts 11 are screwed up for fixing.

S3: binding a cover beam reinforcement cage, and fixing a plurality of the hollow sleeves 1 subjected to the operation in the reinforcement cage according to the designed position.

S4: and (4) supporting the capping beam template, and then pouring capping beam concrete.

S5: after the cap beam concrete is initially set, the bolt 11 is unscrewed, then the special support is pulled downwards, and finally the soft rubber cylinder 2 is pulled downwards.

S6: and (3) transporting the bent cap to a construction site, firstly carrying out base grouting on the top surface of the installed pier stud, then hoisting the bent cap, correspondingly inserting a plurality of main ribs extending out of the top surface of the pier stud into a plurality of hollow sleeves 1 of the bent cap, and carrying out accurate positioning work on the bent cap.

S7: grouting from the opening of the grouting guide pipe 4, stopping grouting after slurry flows out of the slurry outlet guide pipe 5, and then plugging the openings of the grouting guide pipe 4 and the slurry outlet guide pipe 5 by using rubber plugs to finish the connection work of the capping beam and the pier stud.

The special support comprises 1

shaft

10, 3 support plates 6, a plurality of support rods 7, a plurality of

hinges

8 and 1 supporting plate 9, wherein the support plates 6 are parallel to the shaft 10 and are connected with each other through the support rods 7 by the hinges 8, and the support rods 7 in the bottommost row are arranged at the lower ends of the support plates 6; the supporting plate 9 is fixed at the lower part of the shaft 10 and is tightly attached to the bottom row of supporting rods 7; the support rods 7 and the support plates 9 in the bottom row are provided with corresponding bolt holes.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a construction technology that assembled reinforced concrete bridge pier stud is connected with bent cap which characterized in that: the method comprises the following steps:

and (3) prefabricating a cover beam with a concave cavity in the connecting hole: placing a mould in the bent cap reinforcement cage to form a connecting hole with a concave cavity after the cast concrete bent cap is cast, wherein the concave cavity radially extends along the circumferential surface of the connecting hole; the mold comprises a hollowed-out sleeve and a rubber cylinder, wherein a wedge-shaped lug matched with the hollowed-out position of the hollowed-out sleeve is arranged on the whole body of the rubber cylinder, the rubber cylinder is positioned in the hollowed-out sleeve, and the wedge-shaped lug of the rubber cylinder extends out of the hollowed-out position of the hollowed-out sleeve; after the bent cap is poured, the rubber cylinder is taken out, so that the concave cavity is formed in the connecting hole of the bent cap;

2. The construction process according to claim 1, wherein: grouting is carried out from the opening of the grouting guide pipe (4), grouting is stopped after slurry flows out from the slurry outlet guide pipe (5), then the openings of the grouting guide pipe (4) and the slurry outlet guide pipe (5) are blocked by rubber plugs, and the connection work of the bent cap and the pier stud is completed.

3. The construction process according to claim 1, wherein: when the bent cap is poured, a support is arranged in the rubber cylinder.

4. The construction process according to claim 3, wherein: the support comprises a shaft (10), three support plates (6), a plurality of support rods (7), a plurality of hinges (8) and a supporting plate (9); the supporting plates (6) are parallel to the shaft (10), the supporting plates and the shaft are connected through a plurality of supporting rods (7) by hinges (8), and the supporting rods (7) in the bottommost row are arranged at the lower ends of the supporting plates (6); the supporting plate (9) is fixed at the lower part of the shaft (10) and is tightly attached to the bottom row of supporting rods (7); the support rod (7) and the support plate (9) in the bottom row are provided with corresponding bolt holes.