CN114232892B - Fabricated concrete connection structure connected through segmented reinforcing steel bars and construction method thereof - Google Patents
Fabricated concrete connection structure connected through segmented reinforcing steel bars and construction method thereof Download PDFInfo
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- CN114232892B CN114232892B CN202210034987.3A CN202210034987A CN114232892B CN 114232892 B CN114232892 B CN 114232892B CN 202210034987 A CN202210034987 A CN 202210034987A CN 114232892 B CN114232892 B CN 114232892B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/20—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of concrete or other stone-like material, e.g. with reinforcements or tensioning members
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/08—Producing shaped prefabricated articles from the material by vibrating or jolting
- B28B1/093—Producing shaped prefabricated articles from the material by vibrating or jolting by means directly acting on the material, e.g. by cores wholly or partly immersed in the material or elements acting on the upper surface of the material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
- B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
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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
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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
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
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- 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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Abstract
The invention relates to an assembled concrete connection structure connected through segmented reinforcing steel bars, which comprises two concrete prefabricated parts with butt joint ends, wherein reserved pore canals are arranged in the connecting ends of the concrete prefabricated parts, the end heads of all main reinforcing steel bars in the concrete prefabricated parts are exposed out of the inner hole bottoms of the reserved pore canals, the end heads of the main reinforcing steel bars in the two inner hole bottoms are connected through a plurality of segmented connecting reinforcing steel bars positioned in the reserved pore canals, and cement paste filling layers are arranged in the reserved pore canals and used for filling gaps between the segmented connecting reinforcing steel bars and the reserved pore canals. The invention can be used for connecting prefabricated concrete structures, in particular to the prefabricated concrete structures which are required to be prefabricated to realize industrial production and directly assembled on site, has the advantages of less on-site construction wet operation, short construction period, guaranteed component quality, economy, environmental protection and the like, and has good engineering popularization prospect.
Description
Technical Field
The invention relates to an assembled concrete connection structure connected through segmented reinforcing steel bars and a construction method thereof, and relates to the field of civil engineering.
Background
Along with the national economic transformation and the adjustment of industrial structures, china is transformed into a standardized manufacturing mode in a factory. At present, most of structures in China are built by adopting cast-in-situ reinforced concrete technology. Along with popularization and application of the assembly type concrete technology, in order to ensure that the structural performance of the assembly type concrete structure is not lower than that of the cast-in-place concrete structure, corresponding concrete structure technical regulations are formulated in China, and the basic thought is to reasonably split the cast-in-place concrete structure, prefabricate the components in factories, assemble the components on site and the like from structural design to prefabrication of the components on site and the like. The split is favorable for factory prefabrication and field assembly, and the assembled structure meets the safety and functional requirements of the structure. Therefore, various split and assembly connection modes are presented, the connection modes directly influence the construction speed and the structural safety, and the split and assembly connection mode is more widely paid attention to.
There are more joints in fabricated concrete structures than in traditional cast-in-place concrete structures, which not only directly determine the overall safety of the structure, but also affect the durability and practical functionality of the structure. The connection mode of the prefabricated assembly structure needs to be comprehensively considered according to the factors of structural form, earthquake-proof fortification intensity, construction, transportation, assembly and the like. According to domestic and foreign experimental researches and application researches, the reliability of the existing experience abroad and the acceptance of the domestic concept are considered by comparing a plurality of connection structures, and the connection structures adopted in China are mostly grouting sleeve connection structures. The screw steel bar is inserted into the metal sleeve, the high-strength grouting material mixture is poured, and the grouting material is solidified and then is adhered to the screw steel bar to transfer stress, so that the steel bar butt joint connection mode, namely sleeve grouting connection for short, can be divided into full grouting sleeve connection and half grouting sleeve connection.
The existing connection between the steel bar and the sleeve is usually completed by vertical insertion, construction technology is difficult, the problem that the respective position measurement results of the sleeve and the dowel meet the requirements in the actual process, but the sleeve and the dowel are still not installed in splicing can occur, and a large number of application problems are caused in the actual engineering.
Disclosure of Invention
In view of the shortcomings of the prior art, the technical problem to be solved by the invention is to provide an assembled concrete connection structure connected through segmented reinforcing steel bars and a construction method thereof.
In order to solve the technical problems, the technical scheme of the invention is as follows: the utility model provides an assembled concrete connection structure through segmentation reinforcing bar connection, includes two concrete prefabricated components of tip butt joint, the inside reserved pore that all is provided with of link of concrete prefabricated component, the inside main reinforcing bar equal part end of concrete prefabricated component exposes the hole end of reserved pore, connects through the many segmentation connecting bars that are located reserved pore between the main reinforcing bar end at two hole bottoms, the inside grout filling layer that all is provided with of reserved pore for fill the space between segmentation connecting bars and the reserved pore.
Preferably, the sectional connection reinforcing steel bar is divided into three sections: two short steel bars and one long steel bar; the length of the long steel bars is required to be such that the long steel bars do not extend out of the reserved pore canal when all the long steel bars are placed in the reserved pore canal of the concrete prefabricated part at one side; the reserved pore canal is formed by a pre-buried corrugated pipe or a steel grouting sleeve.
Preferably, the long steel bar is positioned between the two reserved holes, the two sections of short steel bars are connected at the two ends of the long steel bar through the steel bar sleeve, and the other ends of the short steel bars are connected with the ends of the main steel bars at the same side through the steel bar sleeve.
Preferably, the outer diameter of the steel bar sleeve is at least 15mm smaller than the inner diameter of the corrugated pipe or the steel grouting sleeve; the inner diameter of the reserved pore canal is at least 20mm larger than the outer diameter of the segmented connecting steel bars.
Preferably, the side surfaces of the concrete prefabricated components are provided with reserved slots communicated with the reserved pore canal, the positions of the reserved slots correspond to those of the short reinforcing steel bars, and the sizes of the reserved slots are required to meet the requirement that the short reinforcing steel bars can be placed into the reserved pore canal along the reserved slots.
Preferably, the reserved slots are located on two opposite sides of the concrete prefabricated part.
Preferably, the preformed notches are located on two opposite sides of the concrete prefabricated part and one of the sides between the two opposite sides.
The construction method of the assembled concrete connection structure connected by the sectional steel bars comprises the following steps: (1) constructing a prefabricated component pedestal and installing a steel template: manufacturing a reinforced concrete pedestal or an all-steel structure pedestal, taking an upper-paved steel plate as a prefabricated member bottom template, adopting a shaping steel template to be matched with the pedestal for design of an outer side template, and reinforcing the template through a pull bolt after the template is accurately positioned; (2) binding and installing a reinforcement cage: checking the bottom template and the side templates, brushing a spacer, hoisting a reinforcement cage into the prefabricated steel template, and fixing the thickness of the protective layer; (3) mounting end templates and embedded parts: the installation end template is installed as a corrugated pipe or a steel grouting sleeve embedded by the sectional connection steel bars, and the position of the corrugated pipe or the steel grouting sleeve is fixed through a groined positioning steel bar net; because the short steel bars in the segmented connection steel bars are required to be placed from the side surface of the concrete prefabricated part, long holes are required to be formed in the side surface of the concrete prefabricated part and the side surface of the corrugated pipe or the steel grouting sleeve, the long holes of the corrugated pipe or the steel grouting sleeve are required to be temporarily plugged, and the reserved long holes of the corrugated pipe or the steel grouting sleeve are ensured not to be penetrated when concrete is poured; (4) casting concrete in the template: pouring concrete after the steel bars and the templates are accepted, vibrating by adopting an attached vibrator and an attached vibrating rod, wherein the concrete is generally not sinking any more, no obvious bubbles rise, and the surface of the concrete is provided with thin-layer cement paste with uniform appearance and plane; and (5) curing concrete: when the air temperature is higher, the strength of the concrete is increased to meet the construction progress requirement, and natural maintenance is adopted; when the outside air temperature can not meet the engineering progress requirement, steam curing is adopted; and (6) hoisting and installing the concrete prefabricated part: firstly, long steel bars in the segmented connection steel bars are placed in reserved pore canals of one side of the concrete prefabricated part, and the connected concrete prefabricated parts are sequentially lifted and assembled; (7) installing connecting steel bars and grouting: short steel bars in the segmented connecting steel bars are placed into the reserved pore canal through the reserved notch, and half of the long steel bars are moved into the reserved pore canal of the concrete prefabricated part on the other side through the reserved pore canal, and the long steel bars are connected with the short steel bars through the steel bar sleeve; and finally, grouting the grouting material in the grouting holes slowly, filling the reserved pore channels and the reserved notch with concrete, and curing; and (3) mutually splicing a plurality of concrete prefabricated components according to the circulation.
Compared with the prior art, the invention has the following beneficial effects: the invention can be used for connecting prefabricated concrete structures, in particular to the prefabricated concrete structures which are required to be prefabricated to realize industrial production and directly assembled on site, has the advantages of less on-site construction wet operation, short construction period, guaranteed component quality, economy, environmental protection and the like, and has good engineering popularization prospect.
The invention will be described in further detail with reference to the drawings and the detailed description.
Drawings
Fig. 1 is a plan view of the connection of embodiment 1 of the present invention.
Fig. 2 is a connection state elevation view of embodiment 1 of the present invention.
Fig. 3 is a second connection state elevation of embodiment 1 of the present invention.
Fig. 4 is a third connection state elevation view of embodiment 1 of the present invention.
Fig. 5 is a sectional view of the I-I of fig. 2.
FIG. 6 is a section II-II of FIG. 2.
Fig. 7 is a connection elevation of embodiment 2 of the present invention.
Fig. 8 is a plan view of the connection of embodiment 2 of the present invention.
Fig. 9 is a cross-sectional view of fig. 7 at iii-iii.
In the figure: 1-reserved pore canal, 2-reinforcing steel bar sleeve, 3-reserved notch, 4-cement paste filling layer, 5-notch post-filling concrete, 6-long reinforcing steel bar, 7-short reinforcing steel bar, 8-main reinforcing steel bar, 9-joint and 10-concrete prefabricated part.
Detailed Description
The invention will be further described with reference to the accompanying drawings and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
As shown in fig. 1-9, this embodiment provides an assembled concrete connection structure through segmentation reinforcing bar connection, including two concrete prefabricated components of tip butt joint, the link inside of concrete prefabricated component all is provided with the reservation pore, the inside main reinforcing bar equal part end of concrete prefabricated component exposes the hole end of reservation pore, connects through the many segmentation connecting bars that are located the reservation pore between the main reinforcing bar end at two inner hole bottoms, the inside grout filling layer that all is provided with of reservation pore, and grout filling layer is grouting material or high-strength mortar. The method is used for filling gaps between the sectional connection reinforcing bars and the reserved pore canal, so that the two connected concrete prefabricated parts are integrally and jointly stressed through the connection of the sectional connection reinforcing bars.
In the embodiment of the invention, the segmented connecting steel bars are divided into three segments: two short steel bars and one long steel bar; the length of the long steel bars is required to be satisfied that when all the long steel bars are placed in the reserved pore canal of the concrete prefabricated part at one side, the long steel bars do not extend out of the reserved pore canal, so that the concrete prefabricated part at one side can be placed in the reserved pore canal before being installed, and the installation of the sectional connection steel bars is convenient to realize; the reserved pore canal is realized by forming holes on a pre-buried corrugated pipe or a steel grouting sleeve, and each main reinforcing steel bar is sleeved into the corrugated pipe or the steel grouting sleeve with proper length during prefabrication.
In the embodiment of the invention, the long steel bar is positioned between two reserved pore canals, two sections of short steel bars are connected at two ends of the long steel bar through the steel bar sleeve, and the other ends of the short steel bars are connected with the ends of main steel bars at the same side through the steel bar sleeve. The main reinforcing steel bars can also be lapped with the reinforcing steel bars in the reserved pore canal.
In the embodiment of the invention, the outer diameter of the steel bar sleeve is at least 15mm smaller than the inner diameter of the corrugated pipe or the steel grouting sleeve; the inner diameter of the reserved pore canal is at least 20mm larger than the outer diameter of the segmented connecting steel bars.
In the embodiment of the invention, the side surfaces of the concrete prefabricated parts are provided with the reserved slots communicated with the reserved pore canal, the positions of the reserved slots correspond to those of the short reinforcing steel bars, and the size of the reserved slots is required to meet the requirement that the short reinforcing steel bars can be placed into the reserved pore canal along the reserved slots. And the side surface of the corrugated pipe or the steel grouting sleeve is grooved corresponding to the installation position of the short steel bar in the reserved pore canal, so that the reserved groove opening is convenient to communicate with the reserved pore canal.
In embodiment 1 of the present invention, the reserved slots are located on both opposite sides of the concrete prefabricated part. The reserved notch is blocked by primary concrete or high-strength mortar or grouting material with higher strength than the concrete of the concrete prefabricated part, and the notch is formed and then filled with concrete.
In embodiment 2 of the present invention, the reserved slots are located on both opposite sides of the concrete prefabricated part and one of the sides between the opposite sides. The difference from embodiment 1 is that the direction of the reserved slots is different, the reserved slots in embodiment 1 are opposite to each other, and the reserved slots can be used in most engineering applications, while in embodiment 2, the situation that the side slope or the foundation is placed for connection is considered, and due to the limitation of the operation surface, the reserved slots on one surface are changed into one reserved slot with the side faces facing each other, so that the construction and the installation are facilitated. The reserved notch is blocked by primary concrete or high-strength mortar or grouting material with higher strength than the concrete of the concrete prefabricated part, and the notch is formed and then filled with concrete.
The construction method of the assembled concrete connection structure connected by the sectional steel bars comprises the following steps:
(1) And (3) constructing a prefabricated component pedestal and installing a steel template: manufacturing a reinforced concrete pedestal or an all-steel structure pedestal, taking an upper-paved steel plate as a prefabricated member bottom template, adopting a shaping steel template to be matched with the pedestal for design of an outer side template, and reinforcing the template through a pull bolt after the template is accurately positioned;
(2) Binding and installing a reinforcement cage: checking the bottom template and the side templates, brushing a spacer, hoisting a reinforcement cage into the prefabricated steel template, and fixing the thickness of the protective layer;
(3) Mounting end template and embedded part: the installation end template is installed as a corrugated pipe or a steel grouting sleeve embedded by the sectional connection steel bars, and the position of the corrugated pipe or the steel grouting sleeve is fixed through a groined positioning steel bar net; because the short steel bars in the segmented connection steel bars are required to be placed from the side surface of the concrete prefabricated part, long holes are required to be formed in the side surface of the concrete prefabricated part and the side surface of the corrugated pipe or the steel grouting sleeve, the long holes of the corrugated pipe or the steel grouting sleeve are required to be temporarily plugged, and the reserved long holes of the corrugated pipe or the steel grouting sleeve are ensured not to be penetrated when concrete is poured; the reserved pore canal can also be formed by embedding a corrugated pipe, the spiral rib is hooped on the outer side of the corrugated pipe, and the axis of the spiral rib is consistent with the axis of the corrugated pipe;
(4) Pouring concrete in the formwork: pouring concrete after the steel bars and the templates are accepted, vibrating by adopting an attached vibrator and an attached vibrating rod, wherein the concrete is generally not sinking any more, no obvious bubbles rise, and the surface of the concrete is provided with thin-layer cement paste with uniform appearance and plane;
(5) And (3) curing concrete: when the air temperature is higher, the strength of the concrete is increased to meet the construction progress requirement, and natural maintenance is adopted; when the outside air temperature can not meet the engineering progress requirement, steam curing is adopted;
(6) Hoisting and installing the concrete prefabricated part: the in-situ movable hoisting of the prefabricated lattice beams adopts gantry cranes, the stacking field of the components is wide, and the stacking field is flat, firm and good in drainage; the prefabricated components are fixed after being loaded by a tire type matched beam transporting vehicle, rubber pads for damping and preventing friction are paved on a carriage plate, the fixing condition is checked, and the prefabricated components can be sent out after meeting the safety transportation requirement. Firstly, long steel bars in the segmented connection steel bars are placed in reserved pore canals of one side of the concrete prefabricated part, and the connected concrete prefabricated parts are sequentially lifted and assembled, so that tight butt joint of adjacent lattice beams (concrete prefabricated parts) at joints is ensured;
(7) Installing connecting steel bars and grouting: the method comprises the steps that short steel bars in the segmented connecting steel bars are placed into reserved holes through reserved slots, half of long steel bars are moved into reserved holes of a concrete prefabricated component on the other side through the reserved holes, and two ends of the long steel bars are exposed out of a reserved length in the corresponding reserved slots for subsequent connection of steel bar sleeves, and the long steel bars and the short steel bars are connected through the steel bar sleeves; and finally, grouting the grouting material in the grouting holes slowly, filling the reserved pore channels and the reserved notch with concrete, and curing; and (3) mutually splicing a plurality of concrete prefabricated components according to the circulation.
The structure does not need bending corrugated pipes and reinforcing steel bars, so that a great amount of labor can be saved in prefabrication, and the manufacturing precision is improved; when in field construction, the sectional steel bar connection is easier to operate, the labor intensity can be reduced, the construction speed is accelerated, and obvious economic benefits are achieved.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the invention in any way, and any person skilled in the art may make modifications or alterations to the disclosed technical content to the equivalent embodiments. However, any simple modification, equivalent variation and variation of the above embodiments according to the technical substance of the present invention still fall within the protection scope of the technical solution of the present invention.
Claims (1)
1. An assembled concrete connection structure through segmentation reinforcing bar connection, its characterized in that: the concrete prefabricated parts are connected through a plurality of section connecting rebars positioned in the reserved pore canals, and cement paste filling layers are arranged in the reserved pore canals and used for filling gaps between the section connecting rebars and the reserved pore canals; the sectional connection reinforcing steel bar is divided into three sections: two short steel bars and one long steel bar; the length of the long steel bars is required to be such that the long steel bars do not extend out of the reserved pore canal when all the long steel bars are placed in the reserved pore canal of the concrete prefabricated part at one side; the reserved pore canal is formed by a pre-buried corrugated pipe or a steel grouting sleeve; the long steel bars are positioned between the two reserved pore canals, the two short steel bars are connected to the two ends of the long steel bars through steel bar sleeves, and the other ends of the short steel bars are connected with the ends of the main steel bars at the same side through the steel bar sleeves; the outer diameter of the steel bar sleeve is at least 15mm smaller than the inner diameter of the corrugated pipe or the steel grouting sleeve; the inner diameter of the reserved pore canal is at least 20mm larger than the outer diameter of the segmented connecting steel bars; the side surfaces of the concrete prefabricated parts are provided with reserved slots communicated with reserved pore canals, the positions of the reserved slots correspond to those of the short reinforcing steel bars, and the reserved slots are sized so that the short reinforcing steel bars can be placed into the reserved pore canals along the reserved slots; the reserved notches are positioned on two opposite side surfaces of the concrete prefabricated part; the reserved notches are positioned on two opposite side surfaces of the concrete prefabricated part and one side surface between the two opposite side surfaces; the construction method of the assembled concrete connection structure connected by the sectional steel bars comprises the following steps: (1) constructing a prefabricated component pedestal and installing a steel template: manufacturing a reinforced concrete pedestal or an all-steel structure pedestal, taking an upper-paved steel plate as a prefabricated member bottom template, adopting a shaping steel template to be matched with the pedestal for design of an outer side template, and reinforcing the template through a pull bolt after the template is accurately positioned; (2) binding and installing a reinforcement cage: checking the bottom template and the side templates, brushing a spacer, hoisting a reinforcement cage into the prefabricated steel template, and fixing the thickness of the protective layer; (3) mounting end templates and embedded parts: the installation end template is installed as a corrugated pipe or a steel grouting sleeve embedded by the sectional connection steel bars, and the position of the corrugated pipe or the steel grouting sleeve is fixed through a groined positioning steel bar net; because the short steel bars in the segmented connection steel bars are required to be placed from the side surface of the concrete prefabricated part, long holes are required to be formed in the side surface of the concrete prefabricated part and the side surface of the corrugated pipe or the steel grouting sleeve, the long holes of the corrugated pipe or the steel grouting sleeve are required to be temporarily plugged, and the reserved long holes of the corrugated pipe or the steel grouting sleeve are ensured not to be penetrated when concrete is poured; (4) casting concrete in the template: pouring concrete after the steel bars and the templates are accepted, vibrating by adopting an attached vibrator and an attached vibrating rod, wherein the concrete is generally not sinking any more, no obvious bubbles rise, and the surface of the concrete is provided with thin-layer cement paste with uniform appearance and plane; and (5) curing concrete: when the air temperature is higher, the strength of the concrete is increased to meet the construction progress requirement, and natural maintenance is adopted; when the outside air temperature can not meet the engineering progress requirement, steam curing is adopted; and (6) hoisting and installing the concrete prefabricated part: firstly, long steel bars in the segmented connection steel bars are placed in reserved pore canals of one side of the concrete prefabricated part, and the connected concrete prefabricated parts are sequentially lifted and assembled; (7) installing connecting steel bars and grouting: short steel bars in the segmented connecting steel bars are placed into the reserved pore canal through the reserved notch, and half of the long steel bars are moved into the reserved pore canal of the concrete prefabricated part on the other side through the reserved pore canal, and the long steel bars are connected with the short steel bars through the steel bar sleeve; and finally, grouting the grouting material in the grouting holes slowly, filling the reserved pore channels and the reserved notch with concrete, and curing; and (3) mutually splicing a plurality of concrete prefabricated components according to the circulation.
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| CN202210034987.3A CN114232892B (en) | 2022-01-13 | 2022-01-13 | Fabricated concrete connection structure connected through segmented reinforcing steel bars and construction method thereof |
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| CN202210034987.3A CN114232892B (en) | 2022-01-13 | 2022-01-13 | Fabricated concrete connection structure connected through segmented reinforcing steel bars and construction method thereof |
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| CN114232892B true CN114232892B (en) | 2023-05-23 |
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| CN110107023B (en) * | 2019-05-10 | 2022-02-11 | 中国十七冶集团有限公司 | Rigid connection prefabricated frame beam for assembly type building |
| CN110792166B (en) * | 2019-12-03 | 2024-07-09 | 张延年 | Reinforced assembled beam column joint |
| CN216893135U (en) * | 2022-01-13 | 2022-07-05 | 福州大学 | Assembled concrete connection structure through segmentation rebar connection |
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2022
- 2022-01-13 CN CN202210034987.3A patent/CN114232892B/en active Active
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