CN115450378A - Positioning, aligning and grouting self-locking connection of connecting steel bars of PC (polycarbonate) component of assembled shear wall - Google Patents
Positioning, aligning and grouting self-locking connection of connecting steel bars of PC (polycarbonate) component of assembled shear wall Download PDFInfo
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- CN115450378A CN115450378A CN202210476806.2A CN202210476806A CN115450378A CN 115450378 A CN115450378 A CN 115450378A CN 202210476806 A CN202210476806 A CN 202210476806A CN 115450378 A CN115450378 A CN 115450378A
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- component
- steel bars
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 63
- 239000010959 steel Substances 0.000 title claims abstract description 63
- 239000004417 polycarbonate Substances 0.000 title claims 12
- 229920000515 polycarbonate Polymers 0.000 title claims 2
- 238000004873 anchoring Methods 0.000 claims abstract description 15
- 239000002184 metal Substances 0.000 claims abstract description 13
- 238000009434 installation Methods 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 9
- 239000004567 concrete Substances 0.000 claims description 7
- 239000011440 grout Substances 0.000 claims description 5
- 238000010276 construction Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000011900 installation process Methods 0.000 claims description 2
- 239000011150 reinforced concrete Substances 0.000 abstract description 5
- 239000002002 slurry Substances 0.000 abstract description 5
- 238000009417 prefabrication Methods 0.000 abstract description 4
- 229910001294 Reinforcing steel Inorganic materials 0.000 abstract 3
- 230000001360 synchronised effect Effects 0.000 abstract 1
- 230000003245 working effect Effects 0.000 abstract 1
- 239000011178 precast concrete Substances 0.000 description 24
- 238000010586 diagram Methods 0.000 description 5
- 238000011160 research Methods 0.000 description 5
- 239000010410 layer Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Classifications
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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
- E04C5/162—Connectors or means for connecting parts for reinforcements
- E04C5/163—Connectors or means for connecting parts for reinforcements the reinforcements running in one single direction
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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
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/56—Load-bearing walls of framework or pillarwork; Walls incorporating load-bearing elongated members
- E04B2/58—Load-bearing walls of framework or pillarwork; Walls incorporating load-bearing elongated members with elongated members of metal
-
- 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
- E04C5/18—Spacers of metal or substantially of metal
-
- 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
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Reinforcement Elements For Buildings (AREA)
Abstract
The invention belongs to the field of assembled reinforced concrete building structures, and aims to improve the problems that in a lap joint connection mode of a PC component slurry anchor, the anchoring efficiency of stressed steel bars is low, the alignment of reserved steel bars and holes in an installation stage is difficult, and the positioning in a prefabrication stage is difficult. The same-specification reinforcing steel bars which are preprocessed into wedge-shaped bodies are placed at the positions where the top ends of the vertical stressed reinforcing steel bars are cut along the diameter, so that the end expansion self-locking working effect of the anchoring reinforcing steel bars is realized; the automatic guide reserved steel bar and hole accurate alignment is realized by additionally arranging a reserved positioning guide steel pipe shear key and a synchronous hole forming process; the reserved vertical stressed steel bars and the holes of the metal corrugated pipes are accurately positioned in a one-to-one mode through factory prefabrication time sequence arrangement of the upper PC component and the lower PC component.
Description
Technical Field
At present, the building industry in China still has a plurality of problems such as low building quality, poor function, serious environmental pollution and the like, and the quality is urgently required to be improved, the function is improved and the environmental damage is reduced by changing the production mode. The promotion of assembly type buildings brings about transformation and upgrading of the building industry, and the problems are well solved. More importantly, the assembly type building is an important composition and realization means of building industrialization, modernization and green building.
The reinforced Concrete shear wall structure is the most used structural form for multi-storey and high-rise residences in China, due to the fact that few foreign materials are adopted, research, test and experience on the assembled integral shear wall structure building are few, the application time of the assembled integral shear wall structure building in China is short, the research and experience are not much, the PC (Precast Concrete) of the shear wall structure is further provided with a plurality of research and development subjects and the test work needs to be deep, particularly, the connection of vertical stress steel bars of a vertical assembled PC component is realized, how to optimize the manufacturing and installation process, how to optimize the engineering quality and safety of the anchoring connection of the vertical stress steel bars, optimizing the installation cost of the building and guaranteeing the engineering progress are particularly important, and the reinforced Concrete shear wall structure is a fort which is most required to be overcome in the PC in China at present.
Background
According to technical regulations of prefabricated concrete structures (JGJ 1-2014), in a prefabricated integral building structure system, longitudinal steel bar connection at joints and seams selects connection modes such as mechanical connection, sleeve grouting connection, slurry anchor lap joint connection, welding connection, binding lap joint connection and the like according to requirements of joint stress, construction process and the like. The technology is mature, the connecting modes suitable for the vertical stressed steel bars of the PC component of the shear wall structure prefabricated wall body are sleeve grouting connection and slurry anchor lap joint connection, the alignment difficulty of the reserved vertical stressed steel bars and the sleeves or the holes of the reserved metal corrugated pipes exists, and the installation in place and the anchoring quality are difficult to guarantee.
The sleeve grouting connection technology is invented in the United states in 1970, is applied to more in the United states and Japan and is tested by a plurality of major earthquakes, but the sizes of stirrups of a sleeve area and a connecting steel bar area are different because the outer diameter of the sleeve is far larger than the diameter of the corresponding connecting steel bar; in order to ensure that the vertical stressed steel bars in the thickness of the concrete protective layer in the sleeve area must move inwards, the thickness of the cross section of the PC component of the shear wall is increased or the height h of the concrete in the stressed area of the stressed cross section is increased 0 The stress on the PC component of the prefabricated shear wall with small thickness is extremely unfavorable; the cost of the sleeve is high, so that the installation cost of the building is increased; in addition, the vertical stressed steel bars are difficult to mount in place or cannot be mounted in place, so that the connection quality of the vertical stressed steel bars is difficult to control, and the phenomenon that the vertical stressed steel bars are reserved at cut parts on site even occurs.
The technical principle of the lap joint mode of the grout anchor is from Europe, foreign research and application are few, although China has certain technical basis for making a large number of research tests in recent years, research institutions and enterprises, and practical engineering is applied, the practical experience is few and the test of a major earthquake is not experienced; the technical specification of prefabricated concrete structures (JGJ 1-2014) item 6.5.4 specifies that the connection mode is not suitable for the longitudinal steel bars with the diameter larger than 20mm and the longitudinal steel bars of the components directly bearing dynamic loads, and according to the analysis of the technical specification of prefabricated concrete structures (JGJ 1-2014) item 7.1.2, the grout anchor lap joint mode is not even recommended in a multi-layer frame.
Therefore, the invention creates a new anchoring connection mode which is necessary for embedding and installing accurate alignment, high anchoring efficiency, economy and applicability of the vertical stressed steel bars of the PC component of the prefabricated shear wall. The invention mainly solves the problems in three aspects in the working practice: how to position and reserve vertical stressed steel bars and grouting holes in the prefabrication process, how to quickly and accurately align in field installation, and how to realize self-locking anchoring after installation. The purposes of simple and convenient factory prefabrication work, high efficiency of field installation, clear self-locking anchoring principle, controllable construction cost and the like are achieved.
Disclosure of Invention
Aiming at the problems of connection and anchoring of vertical stressed steel bars of prefabricated PC components of an assembled integral shear wall structure, the invention cuts a slit at the top end of the vertical stressed steel bar along the diameter, puts the steel bar which is prefabricated into a wedge-shaped body and has the same specification into the slit, presses the steel bar wedge-shaped body into the slit steel bar by means of the self-weight of the prefabricated PC component at the upper part when the vertical stressed steel bar is inserted into a reserved metal corrugated pipe hole to touch the bottom, expands the end part of the vertical stressed steel bar to twice of the original diameter, and then realizes self-locking anchoring connection of the vertical stressed steel bar by pouring grouting materials into the hole of the metal corrugated pipe.
Aiming at the problem that the PC component is difficult to align with the reserved hole of the metal corrugated pipe when the PC component is installed on site, the invention creates the shear key of the steel pipe which is reserved for positioning and guiding at the top of the PC component of the shear wall with the lower part installed in place.
Drawings
The invention comprises four figures, and figure 1 (a schematic diagram of the bottom of an upper prefabricated shear wall PC component) shows a schematic diagram of a pre-embedded slurry anchor hole metal corrugated pipe hole and a guide steel pipe reserved hole reserved at the bottom of an upper reinforced concrete shear wall PC component; FIG. 2 (schematic view of the top of a PC component of a lower prefabricated shear wall) shows a schematic view of a method for embedding vertical stressed steel bars and phi 140X6 positioning guide steel pipe shear keys; FIG. 3 (a schematic diagram of the vertical stressed steel bar self-locking type slurry anchor anchoring connection of a PC component of the prefabricated shear wall) shows a schematic diagram of the connection of PC components of prefabricated reinforced concrete of an upper layer and a lower layer, wherein the end part of the vertical stressed steel bar is shown in detail in a detailed diagram (1); the attached figure 4 (detailed view of vertical stress steel bar end part practice) comprises an exploded view of a self-locking mechanism component, a process view of inserting the self-locking mechanism into a grout anchor hole, and a self-locking view of the bottom of the grout anchor hole of the self-locking mechanism 3.
Detailed Description
In order to ensure accurate alignment of the embedded steel pipe and the vertical stress steel bar of the PC component of the lower prefabricated shear wall and the reserved hole of the PC component of the upper prefabricated shear wall, when the PC component is prefabricated in a factory, the lower component, the embedded steel pipe and the vertical stress steel bar are prefabricated firstly, and then the upper component is prefabricated, and the top end of the lower component and the bottom end of the upper component are required to be attached and prefabricated, so that accurate alignment of the position of the metal corrugated pipe embedded in the upper component and the position of the vertical stress steel bar is ensured, accurate alignment of the embedded steel pipe and the reserved hole of the embedded steel pipe is also ensured, the upper component and the lower component are horizontally separated after the PC component concrete reaches a certain strength, the PC component is transported to a site for installation after numbering, accurate alignment of the embedded steel pipe and the reserved vertical stress steel bar can be completely achieved, and thus the site installation quality and progress can be well ensured.
Claims (4)
1. The invention provides a method for positioning, aligning and grouting self-locking connection of PC (polycarbonate) component connecting steel bars of an assembly shear wall, which is characterized in that a construction process of reserving a metal corrugated pipe hole and pouring grouting materials is adopted, the problems of difficult positioning in a PC component prefabricating stage, difficult alignment in a field installation stage, long anchoring length of a vertical stressed steel bar, low efficiency and the like of reserving a vertical stressed steel bar and the reserved metal corrugated pipe hole in a grout anchor lap joint mode are improved, a new manufacturing process and a self-locking anchoring working principle are provided, the problems of the prefabricating and installation processes are creatively solved, and a self-locking process of a rear anchoring steel bar is created, and the method is characterized in that: .
2. The invention cuts a fork at the top end of a vertical stressed steel bar along the diameter, puts the same-specification steel bar which is preprocessed into a wedge-shaped body into the fork, presses the steel bar wedge-shaped body into the fork steel bar by means of the self-weight of an upper prefabricated PC component when the vertical stressed steel bar is inserted into a reserved metal corrugated pipe hole to touch the bottom, so that the end part of the vertical stressed steel bar is expanded to be twice of the original diameter, and realizes the self-locking anchoring connection with the upper PC component by pouring grouting material.
3. The invention creates the shear key of the steel pipe which is reserved and positioned at the top of the PC component of the shear wall with the lower part installed in place, can conveniently guide the vertical stressed steel bar to be smoothly inserted into the hole of the reserved metal corrugated pipe, and after the PC component is installed in place, the steel pipe filled with concrete is taken as a shear key construction measure at the horizontal joint of the PC component of the upper and lower prefabricated shear walls, thereby greatly improving the shear bearing capacity of the section.
4. In order to ensure that the vertical stress steel bars reserved in the PC component and the holes of the reserved metal corrugated pipes are accurately positioned, a PC component factory prefabricating time sequence and requirements are designed, according to the steps of prefabricating a lower component, pre-embedding steel pipes and the vertical stress steel bars, and then prefabricating an upper component, the top end of the lower component and the bottom end of the upper component are required to be attached and prefabricated, and therefore the accurate alignment of the positions of the metal corrugated pipes pre-embedded in the upper component and the positions of the vertical stress steel bars is ensured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210476806.2A CN115450378A (en) | 2022-04-30 | 2022-04-30 | Positioning, aligning and grouting self-locking connection of connecting steel bars of PC (polycarbonate) component of assembled shear wall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210476806.2A CN115450378A (en) | 2022-04-30 | 2022-04-30 | Positioning, aligning and grouting self-locking connection of connecting steel bars of PC (polycarbonate) component of assembled shear wall |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115450378A true CN115450378A (en) | 2022-12-09 |
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ID=84296052
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210476806.2A Pending CN115450378A (en) | 2022-04-30 | 2022-04-30 | Positioning, aligning and grouting self-locking connection of connecting steel bars of PC (polycarbonate) component of assembled shear wall |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115450378A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE581993A (en) * | 1958-08-29 | 1960-02-25 | United States Steel Corp | Casting Seat Valve for Vacuum Metal Casting Apparatus |
| CN101603336A (en) * | 2008-06-12 | 2009-12-16 | 黑龙江宇辉新型建筑材料有限公司 | Band filling type wallboard precast concrete short-limb shear wall provided and attaching method thereof |
| WO2010072772A1 (en) * | 2008-12-23 | 2010-07-01 | Centrum Paele A/S | Pile extension |
| AU2012100084A4 (en) * | 2011-02-02 | 2012-03-01 | Load And Move Pty Ltd | A Method of Handling a Container |
| CN204386038U (en) * | 2015-01-05 | 2015-06-10 | 浙江自力建设集团有限公司 | Building frame construction infilled wall bar planting plastic fastening |
| CN105442727A (en) * | 2015-12-09 | 2016-03-30 | 浙江大学 | Compound type connection shear wall structure and assembling method thereof |
| CN107366666A (en) * | 2016-08-19 | 2017-11-21 | 邱平 | A kind of difunctional chemically expansible bolt |
| CN113047472A (en) * | 2021-04-25 | 2021-06-29 | 青岛腾远设计事务所有限公司 | Vertical wet method connecting structure of assembled concrete shear wall and construction method thereof |
| CN216893140U (en) * | 2022-03-17 | 2022-07-05 | 华侨大学 | Grouting joint bar compaction grouting sleeve precast concrete column |
-
2022
- 2022-04-30 CN CN202210476806.2A patent/CN115450378A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE581993A (en) * | 1958-08-29 | 1960-02-25 | United States Steel Corp | Casting Seat Valve for Vacuum Metal Casting Apparatus |
| CN101603336A (en) * | 2008-06-12 | 2009-12-16 | 黑龙江宇辉新型建筑材料有限公司 | Band filling type wallboard precast concrete short-limb shear wall provided and attaching method thereof |
| WO2010072772A1 (en) * | 2008-12-23 | 2010-07-01 | Centrum Paele A/S | Pile extension |
| AU2012100084A4 (en) * | 2011-02-02 | 2012-03-01 | Load And Move Pty Ltd | A Method of Handling a Container |
| CN204386038U (en) * | 2015-01-05 | 2015-06-10 | 浙江自力建设集团有限公司 | Building frame construction infilled wall bar planting plastic fastening |
| CN105442727A (en) * | 2015-12-09 | 2016-03-30 | 浙江大学 | Compound type connection shear wall structure and assembling method thereof |
| CN107366666A (en) * | 2016-08-19 | 2017-11-21 | 邱平 | A kind of difunctional chemically expansible bolt |
| CN113047472A (en) * | 2021-04-25 | 2021-06-29 | 青岛腾远设计事务所有限公司 | Vertical wet method connecting structure of assembled concrete shear wall and construction method thereof |
| CN216893140U (en) * | 2022-03-17 | 2022-07-05 | 华侨大学 | Grouting joint bar compaction grouting sleeve precast concrete column |
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Application publication date: 20221209 |