CN114541576B - Connecting structure of assembled reinforced concrete main beam and secondary beam and construction method - Google Patents
Connecting structure of assembled reinforced concrete main beam and secondary beam and construction method Download PDFInfo
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- CN114541576B CN114541576B CN202210139980.8A CN202210139980A CN114541576B CN 114541576 B CN114541576 B CN 114541576B CN 202210139980 A CN202210139980 A CN 202210139980A CN 114541576 B CN114541576 B CN 114541576B
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- prefabricated
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- 238000010276 construction Methods 0.000 title claims abstract description 24
- 239000011150 reinforced concrete Substances 0.000 title claims abstract description 20
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 44
- 239000010959 steel Substances 0.000 claims abstract description 44
- 239000004567 concrete Substances 0.000 claims abstract description 19
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract description 16
- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- 230000002457 bidirectional effect Effects 0.000 claims description 4
- 230000002787 reinforcement Effects 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 241000283690 Bos taurus Species 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 239000011148 porous material Substances 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009417 prefabrication Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/20—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
- E04B1/21—Connections specially adapted therefor
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/20—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
-
- 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
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Mechanical Engineering (AREA)
- Reinforcement Elements For Buildings (AREA)
- Rod-Shaped Construction Members (AREA)
Abstract
The invention discloses a connection structure of an assembled reinforced concrete girder and an auxiliary girder and a construction method thereof, comprising two prefabricated girders, wherein a prefabricated auxiliary girder is arranged between the two prefabricated girders, precast girder post-cast section concrete is arranged on the prefabricated girders, precast auxiliary girder post-cast section concrete is arranged above the prefabricated auxiliary girder, through holes are formed in the prefabricated girders, and bottom reinforcing steel bars are arranged at two ends of the prefabricated auxiliary girder; post-cast concrete is arranged in the through hole. The construction method comprises the following steps: A. hoisting the prefabricated secondary beams to the upper part between two prefabricated main beams; B. obliquely inserting a bottom reinforcing steel bar at one end of the prefabricated secondary beam into a through hole of the prefabricated main beam; C. adjusting the posture of the prefabricated secondary beam to be in a horizontal state; D. translating the prefabricated secondary beam to an accurate position; E. binding post-cast section steel bars of the prefabricated main beams and the prefabricated secondary beams; F. pouring the post-pouring sections of the prefabricated main beams and the prefabricated secondary beams and the holes penetrating through the holes. The invention has the characteristic of effectively reducing construction difficulty.
Description
Technical Field
The invention relates to a connecting structure between an assembled main beam and a secondary beam, in particular to a connecting structure of an assembled reinforced concrete main beam and a secondary beam and a construction method.
Background
Regarding the connection of the prefabricated main beam and the prefabricated secondary beam of the fabricated reinforced concrete, four common methods are as follows: 1) The method has the advantages that the notch on the main beam is a weak part of the main beam, the damage is easy to occur in the transportation and hoisting processes, the bearing capacity of the main beam is affected, and the technical reliability is not high.
2) The post-pouring section is arranged at the end of the secondary beam and can be connected by lap joint, welding and grouting sleeves according to the connection mode of the reinforcing steel bars at the bottom of the secondary beam. The secondary beam end is provided with the post-pouring section connection mode, so that the integrity of the main beam can be effectively ensured, the process cost is lower, but the connection construction of the steel bars at the bottom of the secondary beam is difficult, the reserved straight threads of the main beam are easy to be polluted in the prefabrication production process, the steel bars cannot be screwed in, the sleeve cannot be staggered due to the joints, the primary joints are required to be achieved, the requirements are difficult to meet in the construction site, and the reserved steel bars of the main beam are extremely inconvenient to produce and transport in the component production process.
3) The connection of the rest type prefabricated main and secondary beams can be divided into steel corbels and concrete corbels according to corbel forms, the concrete corbels are good in integrity and durability, but the production difficulty of the components is high, corbel steel bars need to be considered independently, and the design and demolding of a die are difficult. Compared with a concrete bracket, the steel bracket is convenient for component production, but has poor fireproof performance, corrosion resistance and durability, and the large-area on-site welding quality is at risk, and the on-site progress is affected by the welding line detection.
4) The cattle arm plate connecting joint is in grouting operation, but the cattle arm plate connecting joint does not relate to concrete pouring, the integrity of the primary and secondary beams is good, the construction convenience is high, but the production difficulty of the components is high due to the fact that the corresponding primary and secondary beams are complex in structure, the embedded parts, the reserved cattle arm plate notch, the reserved secondary beam shelving notch and the like are involved.
All the four methods have the problem of high construction difficulty.
Disclosure of Invention
The invention aims to provide a connecting structure of an assembled reinforced concrete main beam and a secondary beam and a construction method. The invention has the characteristic of effectively reducing construction difficulty.
The technical scheme of the invention is as follows: the connecting structure of the assembled reinforced concrete main beam and the secondary beam comprises two prefabricated main beams, wherein a prefabricated secondary beam is arranged between the two prefabricated main beams, precast main beam post-cast section concrete is arranged on the prefabricated main beams, precast secondary beam post-cast section concrete is arranged above the prefabricated secondary beams, through holes are formed in the prefabricated main beams, and bottom reinforcing steel bars positioned in the through holes are arranged at two ends of the prefabricated secondary beams; post-cast concrete is arranged in the through hole.
In the connecting structure of the assembled reinforced concrete main beam and the secondary beam, the through holes are bidirectional quadrangular pyramid holes or rectangular square holes.
In the connection structure of the assembled reinforced concrete girder and the secondary girder, the prefabricated girder comprises a prefabricated girder body, prefabricated girder stirrups are arranged at the upper end of the prefabricated girder body and inside the prefabricated girder body, and post-cast section prefabricated girder top steel bars are arranged on the prefabricated girder stirrups.
In the connection structure of the assembled reinforced concrete main beam and the secondary beam, the prefabricated secondary beam comprises a prefabricated secondary beam main body, the upper end and the inside of the prefabricated secondary beam main body are respectively provided with a prefabricated secondary beam stirrup, the prefabricated secondary beam stirrup is provided with a post-cast section prefabricated secondary beam top reinforcing steel bar, and a post-cast section secondary beam stirrup is further arranged between the post-cast section prefabricated secondary beam top reinforcing steel bar and the bottom reinforcing steel bar.
In the connecting structure of the assembled reinforced concrete main beam and the secondary beam, the two ends of the prefabricated secondary beam are also provided with shear-resistant notches.
The construction method of the connection structure of the assembled reinforced concrete main beam and the secondary beam comprises the following steps:
A. hoisting the prefabricated secondary beams to the upper part between the two prefabricated main beams, and keeping the prefabricated secondary beams in an inclined posture during hoisting;
B. Obliquely inserting a bottom reinforcing steel bar at one end of the prefabricated secondary beam into a through hole of the prefabricated main beam;
C. adjusting the posture of the prefabricated secondary beam to be in a horizontal state;
D. translating the prefabricated secondary beam to an accurate position, and simultaneously inserting a bottom reinforcing steel bar at the other end of the prefabricated secondary beam into a through hole of another prefabricated main beam;
E. binding post-cast section steel bars of the prefabricated main beams and the prefabricated secondary beams;
F. Binding the floor slab steel bars above the prefabricated main beams and the prefabricated secondary beams;
G. pouring and maintaining the post-pouring sections of the prefabricated main beams and the prefabricated secondary beams, the floor slab and the hole opening penetrating through the holes.
In the construction method of the connecting structure of the assembled reinforced concrete main beam and the secondary beam, in the step A, the hoisting inclination angle of the prefabricated secondary beam is required to be larger than alpha, and the alpha is calculated and determined according to the following formula: α=arctan (h/Ln), where h is the minor beam height and Ln is the minor beam net span.
In the construction method of the connecting structure of the assembled reinforced concrete main beam and the secondary beam, in the step E, the binding of the post-cast section steel bars comprises post-cast section prefabricated main beam top steel bars, post-cast section prefabricated secondary beam top steel bars and post-cast section secondary beam stirrups.
Compared with the prior art, the through holes are formed in the prefabricated main beams, and the bottom steel bars of the prefabricated secondary beams directly extend into the through holes of the prefabricated main beams, so that the steel bars of the post-pouring section are effectively prevented from being overlapped, a sleeve is not needed, the construction difficulty and the construction cost can be effectively reduced, and the construction convenience is improved; the advantages of the reserved post-pouring groove form of the main beam and the post-pouring section form of the secondary beam section are effectively integrated. Meanwhile, the length of the post-pouring section of the secondary beam end can be reduced, the concept of building industrialization is met, and the energy-saving environment-friendly construction is facilitated. In conclusion, the invention has the characteristic of effectively reducing construction difficulty.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a structural view of a precast secondary beam;
FIG. 3 is a structural view of a prefabricated main beam;
FIG. 4 is a view of the structure of a through-opening;
FIG. 5 is an installation view of step B;
FIG. 6 is an installation view of step C;
FIG. 7 is an installation view of step D;
Fig. 8 is an installation view of step E.
The marks in the drawings are: 1-prefabricated girder, 2-prefabricated secondary beam, 3-prefabricated girder post-cast section concrete, 4-prefabricated secondary beam post-cast section concrete, 5-through holes, 6-bottom steel bars, 7-post-cast concrete, 101-prefabricated girder body, 102-prefabricated girder stirrups, 103-post-cast section prefabricated girder top steel bars, 201-prefabricated secondary beam main bodies, 202-prefabricated secondary beam stirrups, 203-post-cast section prefabricated secondary beam top steel bars and 204-post-cast section secondary beam stirrups.
Detailed Description
The invention is further illustrated by the following figures and examples, which are not intended to be limiting.
Examples. The connecting structure of the assembled reinforced concrete main beam and the secondary beam is shown in fig. 1 to 8, and comprises two prefabricated main beams 1, wherein a prefabricated secondary beam 2 is arranged between the two prefabricated main beams 1, the prefabricated main beam 1 is provided with a prefabricated main beam post-cast section concrete 3, a prefabricated secondary beam post-cast section concrete 4 is arranged above the prefabricated secondary beam 2, the prefabricated main beam 1 is provided with a through hole 5, and two ends of the prefabricated secondary beam 2 are provided with bottom steel bars 6 positioned in the through hole 5; post-cast concrete 7 is arranged in the through hole 5.
Preferably, the through hole 5 may have a bidirectional quadrangular pyramid hole or a rectangular square hole structure.
When the bidirectional quadrangular pyramid open pore or the rectangular square hole is prepared, the template with the corresponding shape is placed at the corresponding position of the prefabricated girder reinforcement cage, and after the prefabricated girder is cast and molded, the template is removed, so that the through open pore with the corresponding shape can be obtained.
The prefabricated girder 1 comprises a prefabricated girder body 101, wherein prefabricated girder stirrups 102 are arranged at the upper end of the prefabricated girder body 101 and inside the body, and post-cast section prefabricated girder top steel bars 103 are arranged at the upper end of the prefabricated girder stirrups 102.
The two ends of the prefabricated girder body are also provided with a prefabricated girder middle waist rib and a prefabricated girder bottom steel bar.
The top steel bars of the post-cast section prefabricated girder are fixed at the upper ends in the stirrups of the prefabricated girder in a binding mode, and the number of the steel bars is two, and the steel bars are arranged in a through length mode.
The prefabricated secondary beam 2 comprises a prefabricated secondary beam main body 201, a prefabricated secondary beam stirrup 202 is arranged at the upper end and the inside of the prefabricated secondary beam main body 201, a post-cast section prefabricated secondary beam top reinforcing steel bar 203 is arranged on the prefabricated secondary beam stirrup 202, and a post-cast section secondary beam stirrup 204 is further arranged between the post-cast section prefabricated secondary beam top reinforcing steel bar 203 and the bottom reinforcing steel bar 6.
The top steel bars of the post-cast section precast secondary beam are fixed at the upper ends in the stirrups of the precast secondary beam in a binding mode, and the number of the steel bars is two, and the steel bars are arranged in a through length mode.
And the post-cast section secondary beam stirrups are bound on the outer sides of the top steel bars and the bottom steel bars of the post-cast section prefabricated secondary beam.
And shear-resistant notches are further formed in the two ends of the prefabricated secondary beam 2.
When the prefabricated main beams and the prefabricated secondary beams are installed and constructed on site, the prefabricated secondary beams are hoisted to the position above the space between the two prefabricated main beams, and the prefabricated secondary beams are kept in an inclined posture during hoisting; the inclination angle of the prefabricated secondary beam for hoisting is required to be larger than alpha, and alpha is calculated and determined according to the following formula: α=arctan (h/Ln), where h is the secondary beam height and Ln is the secondary beam net span; then, the bottom reinforcing steel bars at one end of the precast secondary beam are obliquely inserted into the through holes of the precast main beam, and the posture of the precast secondary beam is adjusted to be in a horizontal state; translating the prefabricated secondary beam to an accurate position, and simultaneously inserting a bottom reinforcing steel bar at the other end of the prefabricated secondary beam into a through hole of another prefabricated main beam; binding post-cast section steel bars of the prefabricated main beam and the prefabricated secondary beam, binding post-cast section prefabricated main beam top steel bars, binding post-cast section prefabricated secondary beam top steel bars, and finally binding post-cast section secondary beam stirrups; finally binding the floor slab steel bars above the prefabricated main beams and the prefabricated secondary beams to finish steel bar binding; and finally, pouring and maintaining the post-pouring sections of the prefabricated main beams and the prefabricated secondary beams, the floor slab and the hole opening penetrating the holes to finish the connection construction of the assembled reinforced concrete main beams and the secondary beams.
Claims (4)
1. The utility model provides a connection structure of assembled reinforced concrete girder and secondary beam, includes two precast girder (1), is equipped with precast secondary beam (2) between two precast girder (1), be equipped with precast girder post-cast section concrete (3) on precast girder (1), precast secondary beam (2) top is equipped with precast secondary beam post-cast section concrete (4), its characterized in that: the prefabricated main beam (1) is provided with a through hole (5), and two ends of the prefabricated secondary beam (2) are provided with bottom steel bars (6) positioned in the through hole (5); post-cast concrete (7) is arranged in the through hole (5); the through hole (5) is a bidirectional quadrangular pyramid hole or a rectangular square hole; the prefabricated girder (1) comprises a prefabricated girder body (101), wherein prefabricated girder stirrups (102) are arranged at the upper end of the prefabricated girder body (101) and inside the body, and post-pouring section prefabricated girder top steel bars (103) are arranged on the prefabricated girder stirrups (102); the precast secondary beam (2) comprises a precast secondary beam main body (201), precast secondary beam stirrups (202) are arranged at the upper end and inside of the precast secondary beam main body (201), post-cast section precast secondary beam top reinforcements (203) are arranged on the precast secondary beam stirrups (202), and post-cast section secondary beam stirrups (204) are further arranged between the post-cast section precast secondary beam top reinforcements (203) and the bottom reinforcements (6); two ends of the prefabricated secondary beam (2) are also provided with shear-resistant notches; the bottom steel bars of the precast secondary beams directly extend into the through holes of the precast main beams, so that the steel bar lap joint of the post-cast section is effectively avoided, and a sleeve is not required.
2. A construction method of a connection structure of a main beam and a secondary beam of fabricated reinforced concrete according to claim 1, comprising the steps of:
A. hoisting the prefabricated secondary beams to the upper part between the two prefabricated main beams, and keeping the prefabricated secondary beams in an inclined posture during hoisting;
B. Obliquely inserting a bottom reinforcing steel bar at one end of the prefabricated secondary beam into a through hole of the prefabricated main beam;
C. adjusting the posture of the prefabricated secondary beam to be in a horizontal state;
D. translating the prefabricated secondary beam to an accurate position, and simultaneously inserting a bottom reinforcing steel bar at the other end of the prefabricated secondary beam into a through hole of another prefabricated main beam;
E. binding post-cast section steel bars of the prefabricated main beams and the prefabricated secondary beams;
F. Binding the floor slab steel bars above the prefabricated main beams and the prefabricated secondary beams;
G. pouring and maintaining the post-pouring sections of the prefabricated main beams and the prefabricated secondary beams, the floor slab and the hole opening penetrating through the holes.
3. The construction method of the connection structure of the main beam and the secondary beam of the fabricated reinforced concrete according to claim 2, wherein: in the step A, the inclination angle of the hoisting of the precast secondary beam is required to be larger than alpha, and alpha is calculated and determined according to the following formula: α=arctan (h/Ln), where h is the minor beam height and Ln is the minor beam net span.
4. The construction method of the connection structure of the main beam and the secondary beam of the fabricated reinforced concrete according to claim 2, wherein: and E, binding the post-cast section steel bars, wherein the binding of the post-cast section steel bars comprises post-cast section precast main beam top steel bars, post-cast section precast secondary beam top steel bars and post-cast section secondary beam stirrups.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210139980.8A CN114541576B (en) | 2022-02-16 | 2022-02-16 | Connecting structure of assembled reinforced concrete main beam and secondary beam and construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210139980.8A CN114541576B (en) | 2022-02-16 | 2022-02-16 | Connecting structure of assembled reinforced concrete main beam and secondary beam and construction method |
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| Publication Number | Publication Date |
|---|---|
| CN114541576A CN114541576A (en) | 2022-05-27 |
| CN114541576B true CN114541576B (en) | 2024-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105040829A (en) * | 2015-06-26 | 2015-11-11 | 南京长江都市建筑设计股份有限公司 | Prefabricated concrete main beam and secondary beam connecting structure and construction method thereof |
| CN110439180A (en) * | 2019-08-20 | 2019-11-12 | 长沙远大住宅工业安徽有限公司 | A kind of cross coupling and construction method |
| CN217128504U (en) * | 2022-02-16 | 2022-08-05 | 浙江大学建筑设计研究院有限公司 | Connection structure of assembled reinforced concrete main beam and secondary beam |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107165272B (en) * | 2017-06-22 | 2024-01-30 | 中国建筑股份有限公司 | Prestressed assembled concrete frame node connecting structure and construction method thereof |
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- 2022-02-16 CN CN202210139980.8A patent/CN114541576B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105040829A (en) * | 2015-06-26 | 2015-11-11 | 南京长江都市建筑设计股份有限公司 | Prefabricated concrete main beam and secondary beam connecting structure and construction method thereof |
| CN110439180A (en) * | 2019-08-20 | 2019-11-12 | 长沙远大住宅工业安徽有限公司 | A kind of cross coupling and construction method |
| CN217128504U (en) * | 2022-02-16 | 2022-08-05 | 浙江大学建筑设计研究院有限公司 | Connection structure of assembled reinforced concrete main beam and secondary beam |
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