CN212426710U - Shear force key-connected prefabricated cap beam structure of assembling - Google Patents
Shear force key-connected prefabricated cap beam structure of assembling Download PDFInfo
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- CN212426710U CN212426710U CN202021848006.1U CN202021848006U CN212426710U CN 212426710 U CN212426710 U CN 212426710U CN 202021848006 U CN202021848006 U CN 202021848006U CN 212426710 U CN212426710 U CN 212426710U
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Abstract
The invention relates to a shear key connected prefabricated assembled bent cap structure, which comprises a bent cap installed on a pier beam and is characterized in that: the bent cap includes two bent cap units of splicing mutually through the connecting piece, and the bent cap unit splices mutually through connecting piece and the mound roof beam that corresponds, the connecting piece includes shear key, steel connection plate, concave type steel groove, and there is concave type steel groove in bent cap unit bottom surface along horizontal pre-buried, has concave type steel groove along vertical pre-buried on the concatenation face of a bent cap unit, and the up end that reaches the mound roof beam on the concatenation face of another bent cap unit is provided with and is used for holding shear key, steel connection plate's prefabricated hole, between two bent cap unit concatenation faces, all be provided with the tie coat between the face of bent cap unit and mound roof beam, the shearing ability reinforce of this structure concatenation face, the installation of shear key is gone on the ground, can effectively improve the degree of interlock of shear key and bent cap structure, the compactness, make overall structure more firm.
Description
Technical Field
The invention relates to a shear key connected prefabricated assembled bent cap structure.
Background
In recent years, the prefabricated capping beam is gradually applied, the procedures of factory manufacturing and field installation are adopted, the construction progress is greatly accelerated, the field operation time is shortened, and meanwhile, the construction risk is greatly reduced due to the reduction of field construction. At the present stage, the prefabricated bent cap connection is mostly connected by using a tooth-shaped shear key or a reserved steel bar hole for grouting sleeve connection, the installation of the shear key needs high-altitude operation, and the field construction steps are complicated.
Disclosure of Invention
The invention provides a shear key connected prefabricated assembled bent cap structure.
The prefabricated assembled capping beam structure comprises a capping beam arranged on a pier beam, wherein the capping beam comprises two capping beam units which are spliced through a connecting piece;
the shear key comprises a horizontal base plate, a high-strength bolt and a top cap, wherein two ends of the horizontal base plate are respectively provided with a vertical flat plate part A and a vertical flat plate part B, the inner end of the high-strength bolt penetrates through the flat plate part A and is in threaded fit with the flat plate part A, the top cap is installed at the inner end of the high-strength bolt through a universal hinge, the outer end of the flat plate part B is provided with a T-shaped part vertical to the flat plate part B, the T-shaped part can be embedded into a notch of the concave steel groove, and the connecting steel plate;
bonding layers are arranged between the splicing surfaces of the two capping beam units and between the connecting surfaces of the capping beam units and the pier beams.
Furthermore, a plurality of pegs A perpendicular to the connection steel plate and the flat plate part B are welded on the back face of the joint face of the connection steel plate and the flat plate part B at intervals along the length direction, and the pegs A are accommodated in the prefabricated holes.
Furthermore, concave type steel bay includes the channel-section steel, and the web lateral surface of channel-section steel has a plurality of rather than vertically peg B along length direction interval welding, the pterygoid lamina medial surface upper end and the pterygoid lamina vertically plate body of channel-section steel both sides, the plate body of both sides and the T type groove of channel-section steel inside notch wall holding T type portion.
Furthermore, at least two concave steel grooves are arranged on each splicing surface at intervals, and each concave steel groove is correspondingly matched with one prefabricated hole.
Furthermore, the shear keys in different concave steel grooves on the same straight line share one connecting steel plate.
Furthermore, a plurality of prestressed pipelines which are correspondingly matched are arranged on the two bent cap units, and prestressed steel bars penetrate through the prestressed pipelines.
Furthermore, the bonding layer is an epoxy resin adhesive layer.
Furthermore, the shear key, the stud A and the stud B are all made of high-quality carbon structural steel.
Compared with the prior art, the invention has the following beneficial effects: the shearing resistance of the splicing surfaces is strong, the installation of the shear keys is carried out on the ground, the construction risk of high-altitude operation is greatly reduced, the engagement degree and tightness of the shear keys and the capping beam structure can be effectively improved, the integral structure is more stable, and the position determination in the construction process is simpler and easier by adopting the form of prefabricated holes.
Drawings
The invention is further described with reference to the following figures.
FIG. 1 is a schematic longitudinal cross-sectional view of an overall structure;
FIG. 2 is a schematic view of the connection of the shear key and the connecting steel plate;
FIG. 3 is a side view of a shear key;
FIG. 4 is a cross-sectional view of a capping beam unit provided with prefabricated holes;
FIG. 5 is a top view of the pier beam;
FIG. 6 is a schematic view of a concave steel trough.
In the figure: 1-a capping beam unit; 2-pier beam; 3-a cleavage bond; 301-a horizontal substrate; 302-high strength bolt; 303-top cap; a 304-T shaped portion; 305-plate portion a; 306-plate portion B; 4-concave steel groove; 401-channel steel; 402-plate body; 5-stud A; 6-stud B; 7-connecting steel plates; 8-prestressed pipe; and 9-prefabricating holes.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
As shown in fig. 1-6, a precast assembled capping beam structure connected by shear keys comprises a capping beam arranged on a pier beam 2, wherein the capping beam comprises two capping beam units 1 spliced by a connecting piece, the capping beam units are spliced with corresponding pier beams by the connecting piece, the connecting piece comprises a shear key 3, a connecting steel plate 7 and a concave steel groove 4, the concave steel groove is embedded in the bottom surface of each capping beam unit along the transverse direction, the concave steel groove is embedded in the splicing surface of one capping beam unit along the longitudinal direction, and precast holes 9 for accommodating the shear key and the connecting steel plate are arranged on the splicing surface of the other capping beam unit and the upper end surface of the pier beam;
the shear key comprises a horizontal base plate 301, a high-strength bolt 302 and a top cap 303, wherein two ends of the horizontal base plate are respectively provided with a vertical flat plate part A305 and a vertical flat plate part B306, the inner end of the high-strength bolt penetrates through the flat plate part A and is in threaded fit with the flat plate part A, the top cap is installed at the inner end of the high-strength bolt through a universal hinge, the outer end of the flat plate part B is provided with a T-shaped part 304 vertical to the flat plate part B, the T-shaped part can be embedded into a notch of the concave steel groove, and the connecting steel plate;
bonding layers are arranged between the splicing surfaces of the two capping beam units and between the connecting surfaces of the capping beam units and the pier beams.
In this embodiment, a plurality of pegs a5 perpendicular to the attachment surface of the connecting steel plate and the flat plate portion B are welded at intervals along the length direction, and the pegs a are accommodated in the preformed holes.
In this embodiment, concave type steel bay includes channel-section steel 401, and the web lateral surface of channel-section steel has a plurality of rather than vertically peg B6 along length direction interval welding, the pterygoid lamina medial surface upper end and the pterygoid lamina vertically plate body 402 of channel-section steel both sides, the plate body of both sides and the T type groove of channel-section steel inside notch wall holding T type portion.
In this embodiment, at least two concave steel grooves are formed in each splicing surface at intervals, and each concave steel groove is correspondingly matched with one prefabricated hole.
In this embodiment, the shear keys in different concave steel grooves on the same straight line share one connecting steel plate.
In this embodiment, two capping beam units are provided with a plurality of prestressed pipes 9 which are correspondingly matched with each other, and prestressed steel bars are arranged in the prestressed pipes in a penetrating manner.
In this embodiment, the adhesive layer is an epoxy resin adhesive layer.
In this embodiment, the shear key, the stud a and the stud B are all made of high-quality carbon structural steel.
The construction steps are as follows:
step 1: prefabricating the capping beam units, the pier beams, the shearing keys and the connecting steel plates, wherein concave steel grooves are pre-embedded in the bottom surfaces of the capping beam units, the concave steel grooves are pre-embedded in the splicing surface of one capping beam unit, and prefabricated holes are reserved on the splicing surface of the other capping beam unit and the upper end surface of the pier beam;
step 2: the component is transported to the site, the shear key is firstly installed on the ground, the T-shaped part of the shear key is embedded into the notch of the corresponding concave steel groove, a connecting steel plate is arranged between the top surface and the concave steel groove, the high-strength bolt is screwed up in a rotating mode, the connecting steel plate is abutted against the inner side surface of the flat plate part B by the top cap, and the concave steel groove, the connecting steel plate and the universal hinge are ensured not to slide relatively;
and step 3: hoisting the two capping beam units by using a crane, and painting epoxy resin as a bonding layer at the splicing joint surface of the capping beam units to enable the connecting steel plate and the shear key on one capping beam unit to completely enter the prefabricated hole on the other capping beam unit; coating epoxy resin on the joint of the lower side surface of each capping beam unit and the pier beam and the upper end surface of the pier beam to serve as bonding layers, and then enabling the two capping beam units to face downwards together, so that the connecting steel plates and the shear keys on the lower sides of the capping beam units completely enter the prefabricated holes on the pier beams correspondingly matched with the capping beam units;
and 4, step 4: penetrating and releasing pre-prepared prestressed reinforcements along a reserved prestressed pipeline, tensioning the prestressed reinforcements by adopting a post-tensioning method and anchoring to enable the two capping beam units to be tightly attached, withdrawing the crane and performing grouting sealing on the prestressed pipeline;
and 5: and filling gaps at the joints by using a high-pressure grouting method, and injecting epoxy bonding glue into the joints at high pressure after solidification so as to ensure that bonding is firmer.
In step 1, the capping beam units are cast in sections from below and above by short lines during prefabrication.
In the step 2, at the joint of the capping beam unit and the pier beam, shear keys in different concave steel grooves on the same horizontal line share one connecting steel plate; and at the joint of the two capping beam units, the shear keys of different concave steel grooves on the same horizontal line share one connecting steel plate.
In step 5, when the epoxy adhesive is injected under high pressure, the epoxy adhesive is injected from one side, and after the adhesive flows out from the other side, the injection is stopped, and the overflowing epoxy adhesive is wiped and cleaned.
If this patent discloses or refers to parts or structures that are fixedly connected to each other, the fixedly connected may be understood as: a detachable fixed connection (for example using a bolt or screw connection) can also be understood as: non-detachable fixed connections (e.g. riveting, welding), but of course, fixed connections to each other may also be replaced by one-piece structures (e.g. manufactured integrally using a casting process) (unless it is obviously impossible to use an integral forming process).
In the embodiment, the T-shaped part can increase the contact surface of the whole structure, so that the resistance generated by friction is increased, and the stability of the structure is improved; the concave steel groove and the steel plate assembly are anchored in the capping beam unit and the pier beam through the studs, so that the stability of the structure is greatly improved; compared with the traditional cast-in-place construction, the prestressed tendon tensioning and anchoring mode greatly shortens the required working time, effectively shortens the construction period on large and medium-long line bridge engineering and improves the efficiency; the shear key forms shear force transmission between the pier beam and the cap beam through friction among the universal hinge, the connecting steel plate and the concave steel groove, so that a combined working form is formed, and the shear resistance of the splicing surface is effectively improved.
In the description of this patent, it is to be understood that the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the patent, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent.
The above-mentioned preferred embodiments, further illustrating the objects, technical solutions and advantages of the present invention, should be understood that the above-mentioned are only preferred embodiments of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The utility model provides a bent cap structure is assembled in prefabrication of shear force key-type connection, is including installing the bent cap on the mound roof beam, its characterized in that: the bent cap comprises two bent cap units spliced by a connecting piece, the bent cap units are spliced with corresponding pier beams by the connecting piece, the connecting piece comprises a shearing key, a connecting steel plate and a concave steel groove, the concave steel groove is transversely pre-embedded in the bottom surface of each bent cap unit, the concave steel groove is longitudinally pre-embedded in the splicing surface of one bent cap unit, and the splicing surface of the other bent cap unit and the upper end surface of each pier beam are provided with prefabricated holes for accommodating the shearing key and the connecting steel plate;
the shear key comprises a horizontal base plate, a high-strength bolt and a top cap, wherein two ends of the horizontal base plate are respectively provided with a vertical flat plate part A and a vertical flat plate part B, the inner end of the high-strength bolt penetrates through the flat plate part A and is in threaded fit with the flat plate part A, the top cap is installed at the inner end of the high-strength bolt through a universal hinge, the outer end of the flat plate part B is provided with a T-shaped part vertical to the flat plate part B, the T-shaped part can be embedded into a notch of the concave steel groove, and the connecting steel plate;
bonding layers are arranged between the splicing surfaces of the two capping beam units and between the connecting surfaces of the capping beam units and the pier beams.
2. The shear keyed prefabricated assembled capping beam structure of claim 1, wherein: a plurality of pegs A perpendicular to the connection steel plate and the flat plate part B are welded on the back face of the joint face of the connection steel plate and the flat plate part B at intervals along the length direction, and the pegs A are accommodated in the prefabricated holes.
3. The shear keyed prefabricated assembled capping beam structure of claim 2, wherein: the concave steel groove comprises a channel steel, a plurality of studs B perpendicular to the channel steel are welded on the outer side surface of a web plate of the channel steel at intervals along the length direction, the upper ends of the inner side surfaces of wing plates on two sides of the channel steel are perpendicular to the plate bodies of the wing plates, and the plate bodies on two sides and a T-shaped groove for containing a T-shaped part are enclosed by a groove opening in the channel steel.
4. The shear keyed prefabricated assembled capping beam structure of claim 2, wherein: at least two concave steel grooves are arranged on each splicing surface at intervals, and each concave steel groove is correspondingly matched with one prefabricated hole.
5. The shear keyed connected precast assembled capping beam structure of claim 4, wherein: the shear keys in different concave steel grooves on the same straight line share one connecting steel plate.
6. The shear keyed prefabricated assembled capping beam structure of claim 1, wherein: and a plurality of prestressed pipelines which are correspondingly matched are arranged on the two capping beam units, and prestressed steel bars are arranged in the prestressed pipelines in a penetrating manner.
7. The shear keyed prefabricated assembled capping beam structure of claim 1, wherein: the bonding layer is an epoxy resin adhesive layer.
8. The shear keyed prefabricated assembled capping beam structure of claim 3, wherein: the shear key, the stud A and the stud B are all made of high-quality carbon structural steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021848006.1U CN212426710U (en) | 2020-08-31 | 2020-08-31 | Shear force key-connected prefabricated cap beam structure of assembling |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021848006.1U CN212426710U (en) | 2020-08-31 | 2020-08-31 | Shear force key-connected prefabricated cap beam structure of assembling |
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| CN212426710U true CN212426710U (en) | 2021-01-29 |
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| CN202021848006.1U Active CN212426710U (en) | 2020-08-31 | 2020-08-31 | Shear force key-connected prefabricated cap beam structure of assembling |
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