CN112726841A - Construction method for assembling rear joint bars of upper and lower-layer prefabricated components - Google Patents
Construction method for assembling rear joint bars of upper and lower-layer prefabricated components Download PDFInfo
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- CN112726841A CN112726841A CN202011600356.0A CN202011600356A CN112726841A CN 112726841 A CN112726841 A CN 112726841A CN 202011600356 A CN202011600356 A CN 202011600356A CN 112726841 A CN112726841 A CN 112726841A
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- 238000010276 construction Methods 0.000 title claims abstract description 22
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 51
- 239000010959 steel Substances 0.000 claims abstract description 51
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract description 14
- 238000011065 in-situ storage Methods 0.000 claims description 12
- 230000003014 reinforcing effect Effects 0.000 claims description 11
- 238000005266 casting Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract 1
- 238000004873 anchoring Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005406 washing Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009417 prefabrication Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
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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
- E04B1/38—Connections for building structures in general
- E04B1/61—Connections for building structures in general of slab-shaped building elements with each other
- E04B1/6108—Connections for building structures in general of slab-shaped building elements with each other the frontal surfaces of the slabs connected together
- E04B1/612—Connections for building structures in general of slab-shaped building elements with each other the frontal surfaces of the slabs connected together by means between frontal surfaces
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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
- E04B1/38—Connections for building structures in general
- E04B1/41—Connecting devices specially adapted for embedding in concrete or masonry
- E04B1/4114—Elements with sockets
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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
- E04B1/38—Connections for building structures in general
- E04B1/41—Connecting devices specially adapted for embedding in concrete or masonry
- E04B1/4157—Longitudinally-externally threaded elements extending from the concrete or masonry, e.g. anchoring bolt with embedded head
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Reinforcement Elements For Buildings (AREA)
Abstract
The invention discloses a construction method for assembling rear joint bars of prefabricated components on upper and lower layers, wherein the prefabricated components comprise cast-in-place cavities which are vertically penetrated through the prefabricated components, a plurality of groups of transverse reinforcing steel bars and a plurality of groups of longitudinal reinforcing steel bars, the longitudinal reinforcing steel bars are positioned in concrete, and the bottoms of the longitudinal reinforcing steel bars extend out of the lower ends of the prefabricated components, and the method comprises the following steps: after the elevation of the lower-layer prefabricated part is adjusted, inserting rear inserted steel bars into a cavity at the top of the lower-layer prefabricated part, wherein the upper end and the lower end of each rear inserted steel bar are of a closed structure; hoisting the upper prefabricated part to the upper part of the lower prefabricated part; and controlling the upper-layer prefabricated component to fall, so that the rear inserted steel bars at the top of the lower-layer prefabricated component extend into the cast-in-place cavity at the bottom of the upper-layer prefabricated component, and the lower ends of the longitudinal steel bars in the cast-in-place cavity at the bottom of the upper-layer prefabricated component are of closed structures, so that ring anchors are formed among the closed structures. The invention can be used for form removal, can also avoid form removal (namely, the corrugated inner module is left in the prefabricated part), and is also suitable for construction of double-skin walls.
Description
Technical Field
The invention relates to the technical field of prefabricated part production and installation, in particular to a construction method for assembling rear dowel bars of prefabricated parts on an upper layer and a lower layer.
Background
The prefabricated elements are concrete elements previously made in a factory by means of moulds. During on-site construction, the prefabricated parts are assembled together up and down, left and right to form a complete floor structure.
The inventor develops a prefabricated component, takes the prefabricated wall body disclosed in CN110965667A as an example, the bottom of the prefabricated component is provided with a cast-in-situ cavity, and when the upper and lower prefabricated wall bodies are connected, the longitudinal steel bars at the top of the lower prefabricated wall body extend into the cast-in-situ cavity at the bottom of the upper prefabricated wall body.
Although the bonding force between the longitudinal steel bars and the cast-in-place concrete is increased and the anchoring strength is improved in the connection mode, the tops of the longitudinal steel bars of the lower-layer prefabricated wall body need to be bent inwards to be staggered with the longitudinal steel bars at the bottom of the upper-layer prefabricated wall body in the horizontal direction of the cast-in-place cavity, and the bending of the longitudinal steel bars can increase the prefabrication difficulty. On the other hand, the inventor believes that there is still room for improvement in the anchoring strength between the upper and lower prefabricated units.
Therefore, the invention is especially provided.
Disclosure of Invention
The invention aims to provide a construction method for assembling prefabricated components on an upper layer and a lower layer, so as to improve the anchoring strength and the shearing resistance of a connecting node of the upper layer and the lower layer.
In order to solve the above problems, an embodiment of the present invention provides a construction method for assembling rear joint bars of prefabricated components on upper and lower floors, where the prefabricated components include a cast-in-place cavity that is through from top to bottom, multiple sets of transverse steel bars, and multiple sets of longitudinal steel bars, where the longitudinal steel bars are located in concrete, and the bottom of the longitudinal steel bars extends out from the lower end of the prefabricated components, and the construction method includes:
after the elevation of the lower-layer prefabricated part is adjusted, inserting rear inserted steel bars into a cavity at the top of the lower-layer prefabricated part, wherein the rear inserted steel bars comprise two bars which are arranged front and back along the thickness direction of the prefabricated part, and the upper end and the lower end of each rear inserted steel bar are provided with closed structures;
hoisting the upper prefabricated part to the upper part of the lower prefabricated part;
controlling the upper-layer prefabricated component to fall down, so that the rear inserted steel bars at the top of the lower-layer prefabricated component extend into the cast-in-place cavity at the bottom of the upper-layer prefabricated component, wherein the lower ends of the longitudinal steel bars in the cast-in-place cavity at the bottom of the upper-layer prefabricated component are of closed structures, and a ring anchor is formed between the closed structures;
after binding of the reinforcing steel bars is completed, erecting a template for in-situ casting, and casting concrete into the cast-in-situ cavity of the upper prefabricated member, so that the concrete is filled into the cast-in-situ cavity and the space between the upper prefabricated member and the lower prefabricated member.
Furthermore, the longitudinal steel bars at the bottom of the upper-layer prefabricated part and the rear inserted steel bars at the top of the lower-layer prefabricated part are mutually staggered in the horizontal direction.
Furthermore, each group of longitudinal steel bars comprises two longitudinal steel bars which are arranged at intervals in the thickness direction of the prefabricated part, and the tops of the two longitudinal steel bars are positioned in the concrete; the bottoms of the two longitudinal steel bars extend out from the lower end of the prefabricated part and form a closed structure.
Furthermore, a water-washing rough surface or a prefabricated rough surface is arranged in the cast-in-place area at the bottom.
Furthermore, after the elevation of the lower-layer prefabricated part is adjusted, the fireproof material is placed at the position corresponding to the lower wall of the window of the vertical prefabricated part.
Furthermore, the safety of the hoisting system is checked before hoisting, and the protective connecting piece can be used for connecting the closed structure at the top end of the vertical steel bar of the prefabricated part.
Compared with the prior art, the invention has the following beneficial effects: prefabricated component about adopting back dowel bar to connect, the upper end and the lower extreme of back dowel bar have all set up closed structure, have increased the combined area of splice node reinforcing bar and concrete, have promoted joint strength, and closed structure can also promote the shear resistance moreover. .
Drawings
Fig. 1 is a schematic view of a connection structure of upper and lower prefabricated components in a construction method for assembling the upper and lower prefabricated components according to an embodiment of the present invention;
FIG. 2 is an enlarged schematic view of FIG. 1 at a connection node;
FIG. 3 is an enlarged schematic view of the structure of FIG. 1 at the bottom;
FIG. 4 is a front view of FIG. 1 (see-through to show internal structure);
FIG. 5 is an enlarged schematic view of FIG. 4 at a connection node;
FIG. 6 is an enlarged perspective view of FIG. 4 at a connection node;
FIG. 7 is a schematic structural view of a connecting node of upper and lower prefabricated parts in another embodiment;
FIG. 8 is a schematic structural view of a connecting node of upper and lower prefabricated parts in another embodiment;
in the figure: 1-lower prefabricated part; 2-upper prefabricated parts; 3-casting a cavity in situ; 4-transverse steel bars; 5-longitudinal steel bars; 51-a first longitudinal rebar; 52-second longitudinal rebar; 6-concrete; 7-a first closed configuration; 8-inserting steel bars at the back; 81-a second closed configuration; 82-third closed configuration.
Detailed Description
The principles and spirit of the present invention will be described with reference to a number of exemplary embodiments shown in the drawings. It should be understood that these embodiments are described only to enable those skilled in the art to better understand and to implement the present invention, and are not intended to limit the scope of the present invention in any way.
According to the construction method for assembling the upper-layer prefabricated component and the lower-layer prefabricated component, provided by the embodiment of the invention, the upper-layer prefabricated component 2 and the lower-layer prefabricated component 1 have the same structure, but one is located above the other and the other is located below the other. In the following description, a flow of the upper prefabricated part 2 during construction will be described on the premise that the lower prefabricated part 1 and the floor surface are already constructed.
Referring to fig. 1 to 6, first, the structure of the prefabricated parts will be described. The prefabricated part comprises a cast-in-place cavity 3, a plurality of groups of transverse reinforcing steel bars 4 and a plurality of groups of longitudinal reinforcing steel bars 5, wherein the cast-in-place cavity is constructed in concrete and penetrates up and down. The two ends of the transverse reinforcing steel bar 4 extend out of the edges of the prefabricated parts for a certain distance and are used for connecting the two horizontally adjacent prefabricated parts. The longitudinal reinforcement 5 is located entirely within the concrete 6 of the prefabricated element, the bottom extending out of the concrete. In some embodiments, the longitudinal reinforcing bars 5 comprise two longitudinal reinforcing bars arranged in tandem along the thickness direction of the prefabricated member, and the bottoms of the two longitudinal reinforcing bars are connected by the first enclosing structure 7 to form a group of longitudinal reinforcing bars 5. A plurality of sets of longitudinal reinforcing bars 5 may be provided along the length of the prefabricated elements. The first enclosing structure 7 may be a length of curved rebar to form a loop after joining two longitudinal rebar ends. For convenience of distinction, in this embodiment, the longitudinal steel bar of the lower prefabricated component is referred to as a first longitudinal steel bar 51, and the longitudinal steel bar of the upper prefabricated component is referred to as a second longitudinal steel bar 52. The top end of the first longitudinal reinforcing bar 51 remains in the concrete 6. The prefabricated member can be provided with or without an insulating layer.
The prefabricated member is internally provided with a cast-in-place cavity 3 which penetrates through the prefabricated member from top to bottom, and the cross section of the cast-in-place cavity 3 can be in any suitable shape, such as an oval shape (shown in figure 7), a round shape (shown in figure 8) or a square shape (shown in figure 2) and the like.
The cast-in-place cavity 3 in the prefabricated part can be constructed by the inner module during the production of the prefabricated part, and the surface of the inner module can have a corrugated structure, so that the cast-in-place cavity can be combined with concrete, and the removal of the inner module is avoided. Of course, the inner module can be drawn out. In addition, the invention is also suitable for the construction of double-skin walls.
The embodiment of the invention provides a construction method for assembling rear dowel bars of prefabricated components on an upper layer and a lower layer, which specifically comprises the following steps:
s1: after the elevation of the lower prefabricated part 1 is adjusted, the rear inserted steel bars 8 are inserted into the cavity at the top of the lower prefabricated part 1, in this embodiment, the rear inserted steel bars 8 comprise two bars which are arranged front and back along the thickness direction of the prefabricated part, and the upper end and the lower end of each bar have a closed structure. For the purpose of distinguishing from the first closed structure 7 described above, the closed structure at the upper end of the rear insert reinforcing bar 8 is referred to as a second closed structure 81, and the closed structure at the lower end is referred to as a third closed structure 82. The second and third enclosed structures 81 and 82 may also employ curved reinforcing bars so that each set of rear insert reinforcing bars is shaped in a long ring configuration.
The longitudinal steel bars 52 at the bottom of the upper-layer prefabricated part 2 and the rear inserted steel bars 8 at the top of the lower-layer prefabricated part 1 are staggered in the horizontal direction, and the rear inserted steel bars 8 are inserted after construction, so that the longitudinal steel bars do not need to be bent at the top during production of the prefabricated parts, and the processing difficulty is reduced.
In addition, after the elevation of the lower prefabricated part 1 is adjusted, the fireproof material is also placed at the position corresponding to the lower wall of the window of the vertical prefabricated part,
s2: hoisting the upper-layer prefabricated part 2 to the upper part of the lower-layer prefabricated part 1; the safety of the hoisting system is checked before hoisting, and the protective connecting piece can be used for connecting the closed structure at the top end of the vertical steel bar of the prefabricated part.
The adjustment of the elevation can be accomplished by means of leveling bolts arranged on top of the lower prefabricated elements 1. Then, the upper precast member is lifted by a lifting device, and slowly dropped down after being positioned substantially above the lower precast member 1.
S3: controlling the upper-layer prefabricated part 2 to fall down, so that the rear inserted steel bar 8 at the top of the lower-layer prefabricated part 1 extends into the cast-in-place cavity at the bottom of the upper-layer prefabricated part 2, and thus, a ring anchor is formed among the first closed structure 7, the second closed structure 81 and the third closed structure 82, and the strength of the upper-layer connecting node and the lower-layer connecting node is improved;
after binding of the reinforcing steel bars is completed, a template for in-situ casting is erected, and concrete is cast in the cast-in-situ cavity of the upper-layer prefabricated component 2, so that the concrete is filled in the cast-in-situ cavity and the space between the upper-layer prefabricated component and the lower-layer prefabricated component. And after the concrete is solidified or semi-solidified, removing the template so as to finish the assembly type connection between the upper-layer prefabricated part 2 and the lower-layer prefabricated part 1.
Furthermore, a water-washing rough surface or a prefabricated rough surface is arranged in the cast-in-place area at the bottom. (more specifically, a water-washed roughened surface or a pre-fabricated roughened surface may be provided in the overlapping region of the upper and lower longitudinal steel bars). After the rough surface is arranged, the bonding strength of new and old concrete in a cast-in-place area is higher.
The inventive concept is explained in detail herein using specific examples, which are given only to aid in understanding the core concepts of the invention. It should be understood that any obvious modifications, equivalents and other improvements made by those skilled in the art without departing from the spirit of the present invention are included in the scope of the present invention.
Claims (6)
1. A construction method for assembling rear joint bars of prefabricated components on upper and lower layers is characterized in that the prefabricated components comprise cast-in-place cavities which penetrate through the prefabricated components from top to bottom, multiple groups of transverse reinforcing steel bars and multiple groups of longitudinal reinforcing steel bars, the longitudinal reinforcing steel bars are located in concrete, and the bottoms of the longitudinal reinforcing steel bars extend out of the lower ends of the prefabricated components, and the construction method comprises the following steps:
after the elevation of the lower-layer prefabricated part is adjusted, inserting rear inserted steel bars into a cavity at the top of the lower-layer prefabricated part, wherein the rear inserted steel bars comprise two bars which are arranged front and back along the thickness direction of the prefabricated part, and the upper end and the lower end of each rear inserted steel bar are provided with closed structures;
hoisting the upper prefabricated part to the upper part of the lower prefabricated part;
controlling the upper-layer prefabricated component to fall down, so that the rear inserted steel bars at the top of the lower-layer prefabricated component extend into the cast-in-place cavity at the bottom of the upper-layer prefabricated component, wherein the lower ends of the longitudinal steel bars in the cast-in-place cavity at the bottom of the upper-layer prefabricated component are of closed structures, and a ring anchor is formed between the closed structures;
after binding of the reinforcing steel bars is completed, erecting a template for in-situ casting, and casting concrete into the cast-in-situ cavity of the upper prefabricated member, so that the concrete is filled into the cast-in-situ cavity and the space between the upper prefabricated member and the lower prefabricated member.
2. The construction method for assembling the rear dowels of the upper and lower prefabricated members as claimed in claim 1, wherein the longitudinal reinforcing bars at the bottom of the upper prefabricated member and the rear dowels at the top of the lower prefabricated member are horizontally staggered.
3. The construction method for assembling the rear joint bars of the prefabricated components on the upper and lower layers according to claim 1, wherein each group of longitudinal steel bars comprises two longitudinal steel bars which are arranged at intervals in the thickness direction of the prefabricated components, and the tops of the two longitudinal steel bars are positioned in the concrete; the bottoms of the two longitudinal steel bars extend out from the lower end of the prefabricated part and form a closed structure.
4. The construction method for assembling the rear joint bars of the prefabricated parts on the upper and lower floors as claimed in claim 1, wherein the cast-in-place area at the bottom is provided with a water-washed rough surface or a prefabricated rough surface.
5. The construction method for assembling the rear joint bars of the upper and lower prefabricated parts according to claim 1, wherein after the elevation of the lower prefabricated part is adjusted, a fireproof material is further placed at a position corresponding to the lower wall of the window of the vertical prefabricated part.
6. The construction method for assembling the rear joint bars of the upper and lower prefabricated parts according to claim 1, wherein the safety of a hoisting system is checked before hoisting, and a closed structure at the top end of the vertical steel bars of the prefabricated parts can be connected by using a protective connecting piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011600356.0A CN112726841A (en) | 2020-12-29 | 2020-12-29 | Construction method for assembling rear joint bars of upper and lower-layer prefabricated components |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011600356.0A CN112726841A (en) | 2020-12-29 | 2020-12-29 | Construction method for assembling rear joint bars of upper and lower-layer prefabricated components |
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| CN112726841A true CN112726841A (en) | 2021-04-30 |
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| CN202011600356.0A Pending CN112726841A (en) | 2020-12-29 | 2020-12-29 | Construction method for assembling rear joint bars of upper and lower-layer prefabricated components |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102433945A (en) * | 2011-08-30 | 2012-05-02 | 东南大学 | Vertical mixed connection structure and method of prefabricated internal wallboards for assembling shear wall structure |
| WO2013159682A1 (en) * | 2012-04-27 | 2013-10-31 | Chu Mingjin | Prefabricated reinforced concrete member having groove, and manufacturing method thereof |
| CN105544801A (en) * | 2016-01-28 | 2016-05-04 | 湖南大学 | Bolted connection technique for prefabricated large plate shear wall provided with concealed bracing and construction method |
| CN108360712A (en) * | 2018-03-29 | 2018-08-03 | 浙江大学建筑设计研究院有限公司 | A kind of assembled steel reinforced concrete shear force wall and its construction method |
| CN110924560A (en) * | 2019-08-09 | 2020-03-27 | 承德绿建建筑节能科技有限公司 | Prefabricated wall body, rear joint bar connecting structure, connecting method and wall body mold |
| CN111691548A (en) * | 2020-07-21 | 2020-09-22 | 承德绿建建筑节能科技有限公司 | Upper and lower layer connecting structure and method of prefabricated part |
| CN111894168A (en) * | 2020-06-30 | 2020-11-06 | 承德绿建建筑节能科技有限公司 | Prefabricated outer wall component for passive house, connecting structure and construction method |
-
2020
- 2020-12-29 CN CN202011600356.0A patent/CN112726841A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102433945A (en) * | 2011-08-30 | 2012-05-02 | 东南大学 | Vertical mixed connection structure and method of prefabricated internal wallboards for assembling shear wall structure |
| WO2013159682A1 (en) * | 2012-04-27 | 2013-10-31 | Chu Mingjin | Prefabricated reinforced concrete member having groove, and manufacturing method thereof |
| CN105544801A (en) * | 2016-01-28 | 2016-05-04 | 湖南大学 | Bolted connection technique for prefabricated large plate shear wall provided with concealed bracing and construction method |
| CN108360712A (en) * | 2018-03-29 | 2018-08-03 | 浙江大学建筑设计研究院有限公司 | A kind of assembled steel reinforced concrete shear force wall and its construction method |
| CN110924560A (en) * | 2019-08-09 | 2020-03-27 | 承德绿建建筑节能科技有限公司 | Prefabricated wall body, rear joint bar connecting structure, connecting method and wall body mold |
| CN111894168A (en) * | 2020-06-30 | 2020-11-06 | 承德绿建建筑节能科技有限公司 | Prefabricated outer wall component for passive house, connecting structure and construction method |
| CN111691548A (en) * | 2020-07-21 | 2020-09-22 | 承德绿建建筑节能科技有限公司 | Upper and lower layer connecting structure and method of prefabricated part |
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