CN113982310B - Structure for additionally arranging cantilever structure on existing reinforced concrete beam and construction method - Google Patents
Structure for additionally arranging cantilever structure on existing reinforced concrete beam and construction method Download PDFInfo
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- CN113982310B CN113982310B CN202111367111.2A CN202111367111A CN113982310B CN 113982310 B CN113982310 B CN 113982310B CN 202111367111 A CN202111367111 A CN 202111367111A CN 113982310 B CN113982310 B CN 113982310B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0266—Enlarging
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Abstract
The invention relates to a structure and a construction method for adding an overhanging structure on an existing reinforced concrete beam, belonging to the technical field of civil construction. The cantilever structure is simple and feasible in structure, economical and practical, and can meet the anti-overturning requirement of the cantilever structure.
Description
Technical Field
The invention relates to a structure for additionally arranging an overhanging structure on an existing reinforced concrete beam and a construction method, belonging to the technical field of civil construction.
Background
With the development of our society, the reinforcement technology of concrete buildings is developed more and more, but still many problems need to be solved. In recent years, the demand for reinforcing and modifying buildings is increasing, and especially for reinforcing and modifying the reinforced concrete frame structure which is most widely applied at present, for example, some projects need to be additionally provided with some overhanging structures on the existing building structure in order to meet the demand of functionality or aesthetic property, and for the reinforced concrete frame structure, the difficulty is that the overhanging structure is reasonably connected with the original structure by using the structural characteristics on the premise of not excessively influencing the original structure and resisting overturning together.
In addition, in the structural design of buildings, some projects need to be provided with overhanging structures to meet the requirements of functionality and attractiveness, but the construction of the projects often faces a plurality of problems, particularly whether the design of the joint of the projects and the main structure is reasonable or not, so that the overall safety of the structure is directly related, and the construction period, the construction cost and the like are greatly influenced.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a structure and a construction method for adding an overhanging structure on an existing reinforced concrete beam, and aims to solve the problems of difficulty in arranging the overhanging structure and troublesome construction in a modern building structure.
In order to achieve the purpose, the invention adopts the following technical scheme:
a structure with an overhanging structure added on an existing reinforced concrete beam comprises a floor slab, a steel support, a steel plate, an anchor bolt, a shear key, a reinforced concrete bracket, the overhanging structure and the reinforced concrete beam;
the upper part and the lower part of the steel support are respectively connected with an overhanging structure and a steel plate, the steel plate is positioned below the steel support, one end of the anchor bolt and the shear key are fixed on the steel plate, the other end of the anchor bolt and the shear key are anchored into the reinforced concrete bracket or the reinforced concrete beam, and the lower surface of the steel plate is welded with the floor slab steel bar;
the reinforced concrete corbels are positioned on two sides of the reinforced concrete beam, the edges of the reinforced concrete corbels are flush with the steel plate, and the prestressed tendons, the transverse tendons and the annular stirrups are arranged in the reinforced concrete corbels; the prestressed tendons and the transverse tendons penetrate through the reinforced concrete beam in a punching mode, and the hoop reinforcements and the transverse tendons are bound and fixed.
Further, still be provided with temporary support between floor and the structure of encorbelmenting, temporary support is used for supporting the structure of encorbelmenting of establishing additional during the construction.
Further, the temporary support is a lattice column or a section steel.
Further, the steel support is an anti-seismic spherical hinged support.
Furthermore, the upper end anchor of crab-bolt is on the steel sheet to be the rectangle on the steel sheet surface and arrange, in the lower extreme stock embedding reinforced concrete bracket or the reinforced concrete roof beam of crab-bolt, crab-bolt and steel sheet adopt perforation plug welding connected mode.
Furthermore, the shear keys are angle steels, are welded below the steel plates, are buried in the reinforced concrete corbels and are symmetrically arranged in the reinforced concrete corbels at two ends.
Furthermore, the two shear keys are oppositely arranged into a group of T-shaped shear key structures, and four groups of shear key structures are arranged in the reinforced concrete corbels on two sides of the reinforced concrete beam.
Furthermore, the prestressed tendons are arranged between the two layers of transverse tendons and penetrate through the prestressed pipeline.
The construction method of the structure comprises the following steps:
step 1: chiseling the floor slab concrete at the position of the added overhanging structure to expose the floor slab reinforcing steel bars;
and 2, step: punching along the transverse direction of the reinforced concrete beam, and inserting a prestressed pipeline and a transverse rib;
and 3, step 3: binding and fixing the circumferential stirrups and the transverse reinforcements in the reinforced concrete corbel;
and 4, step 4: welding anchor bolts and shear keys at corresponding positions of the steel plates, placing the steel plates at preset positions and welding and fixing the steel plates with floor slab reinforcing steel bars;
and 5: the formwork is supported and concrete is poured to form a reinforced concrete corbel;
step 6: stretching the prestressed reinforcing steel after the concrete reaches a certain strength;
and 7: arranging a steel support on the steel plate, and arranging a temporary support on the floor slab;
and 8: and an overhanging structure is arranged on the steel support and the temporary support.
The invention achieves the following technical effects:
the cantilever structure is simple and practical in structural design, convenient to construct, high in practical popularization value, simple and feasible in structure, economical and practical, and capable of meeting the anti-overturning requirement of the cantilever structure.
Drawings
FIG. 1 is a perspective (overall) cross-sectional view of the present invention;
FIG. 2 is a schematic plan view of the arrangement of the steel plates (with reinforced concrete corbels arranged at the lower part) of the present invention;
FIG. 3 isbase:Sub>A schematic view of the A-A section of the rebar of FIG. 2 of the present invention;
FIG. 4 is a schematic view of the present invention showing a section of the steel bar of FIG. 2B-B;
wherein, 1, a floor slab; 2. a steel support; 3. a steel plate; 4. an anchor bolt; 5. a shear key; 6. a reinforced concrete corbel; 7. temporarily supporting; 8. a cantilever structure; 9. a reinforced concrete beam; 10. floor slab reinforcing steel bars; 11. prestressed tendons; 12. transverse ribs; 13. and (5) hoop reinforcement.
Detailed Description
The following description of the embodiments of the present invention will be made in detail with reference to the accompanying drawings 1 to 4 and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
In the description of the present invention, it is to be understood that the terms "height," "upper," "lower," "top," "bottom," "inner," "outer," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the figures, which are based on the orientation or positional relationship shown in the figures, and are used for convenience in describing the present invention and to simplify the description, but are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be operated in a particular orientation, and thus should not be construed as limiting the present invention.
Referring to fig. 1 to 4, a structure in which an overhanging structure is added to an existing reinforced concrete beam includes a floor slab 1, a steel support 2, a steel plate 3, an anchor bolt 4, a shear key 5, a reinforced concrete corbel 6, an overhanging structure 8, and a reinforced concrete beam 9. Still be provided with interim support 7 between floor 1 and the structure 8 of encorbelmenting, interim support 7 is used for supporting during the construction to add the structure 8 of encorbelmenting of establishing, and in this embodiment, interim support 7 is the lattice column.
The steel support 2 is an anti-seismic spherical hinged support, the upper part and the lower part of the anti-seismic spherical hinged support are respectively connected with an overhanging structure 8 and a steel plate 3, the steel plate 3 is positioned below the steel support 2, one ends of anchor bolts 4 and shear keys 5 are fixed on the steel plate 3, the other ends of the anchor bolts are anchored into a reinforced concrete bracket 6 or a reinforced concrete beam 9, and the lower surface of the steel plate 3 is welded with floor slab steel bars 10, so that the steel plate 3 is more firmly connected with a lower part structure. The upper end anchor of crab-bolt 4 is on steel sheet 3 to be the rectangle on steel sheet 3 surfaces and arrange, in the lower extreme stock embedding reinforced concrete bracket 6 or reinforced concrete roof beam 9 of crab-bolt 4, crab-bolt 4 and steel sheet 3 adopt perforation plug welding connected mode. The shear keys 5 are angle steels, are welded below the steel plates 3, are embedded in the reinforced concrete corbels 6 and are symmetrically arranged in the reinforced concrete corbels 6 at two ends. As shown in fig. 2, two shear keys 5 are oppositely arranged as a set of T-shaped shear key structures, and there are four sets of shear key structures, which are symmetrically arranged in the reinforced concrete corbels 6 at both sides of the reinforced concrete beam 9. The anchor 4 and shear key 5 are arranged to resist bending moments and horizontal forces.
As shown in fig. 3-4, the reinforced concrete corbels 6 are positioned on two sides of the reinforced concrete beam 9, the edges of the reinforced concrete corbels are flush with the steel plates 3, and the prestressed tendons 11, the transverse tendons 12 and the hoop reinforcements 13 are arranged inside the reinforced concrete corbels 6. The prestressed tendons 11 and the transverse tendons 12 are punched to penetrate through the reinforced concrete beam 9, and the annular stirrups 13 are bound and fixed with the transverse tendons 12. The prestressed tendons 11 are arranged between two layers of transverse tendons 12, and the prestressed tendons 11 penetrate through the prestressed pipeline. The reinforced concrete corbel 6, the reinforced concrete beam 9 and the steel plate 3 are fixed to form a whole, and the integrity is good.
The construction method of the structure comprises the following steps:
step 1: and chiseling the floor concrete added with the position of the overhanging structure 8 to expose the floor reinforcing steel bars 10.
Step 2: the reinforced concrete beam 9 is perforated transversely and the prestressed pipe and the transverse bar 12 are inserted.
And step 3: and binding and fixing the hoop stirrups 13 and the transverse reinforcements 12 for forming the reinforced concrete corbel 6.
And 4, step 4: and welding the anchor bolts 4 and the shear keys 5 at corresponding positions of the steel plates 3, placing the steel plates 3 at preset positions and welding and fixing the steel plates with the floor slab reinforcing steel bars 10.
And 5: and (5) erecting the formwork and pouring concrete to form the reinforced concrete corbel 6.
Step 6: and after the concrete reaches a certain strength, tensioning the prestressed tendons 11.
And 7: a steel support 2 is arranged on the steel plate 3, and a temporary support 7 is arranged on the floor slab 1.
And 8: overhanging structures 8 are arranged on the steel support 2 and the temporary support 7.
The above embodiments are merely provided to illustrate the technical solutions of the present invention more clearly, and are not intended to limit the present invention, and variations of the technical solutions of the present invention by those skilled in the art based on the common general knowledge in the art are also within the scope of the present invention.
Claims (9)
1. The utility model provides an add the structure of establishing the structure of encorbelmenting on existing reinforced concrete roof beam which characterized in that: the steel plate reinforced concrete floor comprises a floor slab (1), a steel support (2), a steel plate (3), anchor bolts (4), shear keys (5), a reinforced concrete corbel (6), a cantilever structure (8) and a reinforced concrete beam (9);
the upper part and the lower part of the steel support (2) are respectively connected with an overhanging structure (8) and a steel plate (3), the steel plate (3) is positioned below the steel support (2), one end of an anchor bolt (4) and a shear key (5) is fixed on the steel plate (3), the other end of the anchor bolt is anchored into the reinforced concrete bracket (6) or the reinforced concrete beam (9), and the lower surface of the steel plate (3) is welded with a floor slab steel bar (10);
the reinforced concrete corbels (6) are positioned on two sides of the reinforced concrete beam (9), the edges of the reinforced concrete corbels are flush with the steel plate (3), and the prestressed tendons (11), the transverse tendons (12) and the annular stirrups (13) are arranged in the reinforced concrete corbels (6); the prestressed reinforcement (11) and the transverse reinforcement (12) are punched to penetrate through the reinforced concrete beam (9), and the hoop reinforcement (13) is bound and fixed with the transverse reinforcement (12).
2. The structure of claim 1, wherein the cantilever structure is additionally arranged on the existing reinforced concrete beam, and the structure comprises: still be provided with interim support (7) between floor (1) and the structure (8) of encorbelmenting, interim support (7) are used for supporting during the construction encorbelment structure (8) of establishing additional.
3. The structure of claim 2, wherein the cantilever structure is additionally provided on the existing reinforced concrete beam, and the structure comprises: the temporary support (7) is a lattice column or section steel.
4. The structure of claim 1, wherein the cantilever structure is additionally arranged on the existing reinforced concrete beam, and the structure comprises: the steel support (2) is an anti-seismic spherical hinged support.
5. The structure of claim 1, wherein the overhanging structure is additionally arranged on the existing reinforced concrete beam, and is characterized in that: the upper end anchor of crab-bolt (4) is on steel sheet (3) to be the rectangle on steel sheet (3) surface and arrange, in the lower extreme stock embedding reinforced concrete bracket (6) or reinforced concrete roof beam (9) of crab-bolt (4), crab-bolt (4) and steel sheet (3) adopt perforation plug welding connected mode.
6. The structure of claim 5, wherein the cantilever structure is additionally provided on the existing reinforced concrete beam, and the structure comprises: the shear keys (5) are angle steels, are welded below the steel plate (3), are embedded in the reinforced concrete corbels (6), and are symmetrically arranged in the reinforced concrete corbels (6) at two ends.
7. The structure of claim 6, wherein the overhanging structure is additionally arranged on the existing reinforced concrete beam, and is characterized in that: the two shear keys (5) are oppositely arranged into a group of T-shaped shear key structures, and four groups of shear key structures are arranged in total and are symmetrically arranged in the reinforced concrete corbels (6) on two sides of the reinforced concrete beam (9).
8. The structure of claim 1, wherein the overhanging structure is additionally arranged on the existing reinforced concrete beam, and is characterized in that: the prestressed tendons (11) are arranged between the two layers of transverse tendons (12), and the prestressed tendons (11) penetrate through the prestressed pipeline.
9. A construction method for adding an overhanging structure to an existing reinforced concrete beam according to claims 1 to 8, comprising the steps of:
step 1: chiseling the floor concrete at the position of the cantilever structure (8) to expose the floor reinforcing steel bars (10);
step 2: transversely punching along a reinforced concrete beam (9), and inserting a prestressed pipeline and a transverse rib (12);
and step 3: binding and fixing the hoop reinforcement (13) and the transverse reinforcement (12) which are used for forming the reinforced concrete corbel (6);
and 4, step 4: welding the anchor bolts (4) and the shear keys (5) at corresponding positions of the steel plates (3), placing the steel plates (3) at preset positions and welding and fixing the steel plates with the floor slab reinforcing steel bars (10);
and 5: the formwork is supported and concrete is poured to form a reinforced concrete corbel (6);
and 6: stretching the prestressed reinforcing steel bars (11) after the concrete reaches a certain strength;
and 7: a steel support (2) is arranged on the steel plate (3), and a temporary support (7) is arranged on the floor slab (1);
and step 8: and overhanging structures (8) are arranged on the steel support (2) and the temporary support (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111367111.2A CN113982310B (en) | 2021-11-18 | 2021-11-18 | Structure for additionally arranging cantilever structure on existing reinforced concrete beam and construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111367111.2A CN113982310B (en) | 2021-11-18 | 2021-11-18 | Structure for additionally arranging cantilever structure on existing reinforced concrete beam and construction method |
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| CN113982310A CN113982310A (en) | 2022-01-28 |
| CN113982310B true CN113982310B (en) | 2022-11-08 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001295478A (en) * | 2000-04-14 | 2001-10-26 | Takenaka Komuten Co Ltd | Connecting method for src constructed existing skeleton and repairing member |
| CN105649217A (en) * | 2015-12-31 | 2016-06-08 | 上海建工建集团有限公司 | Profiled steel structure beam column joint for reverse construction of stiffened structure and construction method |
| CN113653359A (en) * | 2021-09-18 | 2021-11-16 | 刘征 | Newly-added beam and existing column joint annular steel plate hoop conversion connection structure |
-
2021
- 2021-11-18 CN CN202111367111.2A patent/CN113982310B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001295478A (en) * | 2000-04-14 | 2001-10-26 | Takenaka Komuten Co Ltd | Connecting method for src constructed existing skeleton and repairing member |
| CN105649217A (en) * | 2015-12-31 | 2016-06-08 | 上海建工建集团有限公司 | Profiled steel structure beam column joint for reverse construction of stiffened structure and construction method |
| CN113653359A (en) * | 2021-09-18 | 2021-11-16 | 刘征 | Newly-added beam and existing column joint annular steel plate hoop conversion connection structure |
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| CN113982310A (en) | 2022-01-28 |
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