CN110820990B - Embedded steel bar positioning and grouting method for PC component construction - Google Patents

Embedded steel bar positioning and grouting method for PC component construction Download PDF

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Publication number
CN110820990B
CN110820990B CN201911189379.4A CN201911189379A CN110820990B CN 110820990 B CN110820990 B CN 110820990B CN 201911189379 A CN201911189379 A CN 201911189379A CN 110820990 B CN110820990 B CN 110820990B
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China
Prior art keywords
grouting
embedded steel
positioning
steel bars
component
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Active
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CN201911189379.4A
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Chinese (zh)
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CN110820990A (en
Inventor
李伟
马波
殷建锋
杨超
孙中光
马启家
李亚东
马乐元
彭远远
倪合成
董加贝
邵叶
胡奇
高长亮
陆也
宁文义
程龙
马一强
石磊
张超建
李晨东
夏群山
李峰
张传鑫
史永志
周扬
王龙
郑蒙
苏博文
马云龙
李想
李征
王亚楠
顾云斌
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Anhui Jinggong Green Construction Group Co ltd
China Coal No 3 Construction Group Co Ltd
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Anhui Jinggong Green Construction Group Co ltd
China Coal No 3 Construction Group Co Ltd
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Priority to CN201911189379.4A priority Critical patent/CN110820990B/en
Publication of CN110820990A publication Critical patent/CN110820990A/en
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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B2/00Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04CSTRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/16Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/02Conveying or working-up concrete or similar masses able to be heaped or cast

Abstract

The invention discloses a positioning and grouting method for embedded steel bars in PC component construction, which comprises two procedures of positioning and grouting the embedded steel bars, wherein the embedded steel bars are positioned by adopting positioning flat irons, the procedure is simple, and the problem of inaccurate positioning of the embedded steel bars in the PC component construction process is solved; the grouting adopts a high-level funnel grouting method, the requirement of grouting compactness is met by utilizing the potential energy difference of the improved grout, the technical problems of grout waste, complex operation, high cost and the like in the grouting process are avoided, the construction quality of the PC component can be effectively guaranteed, and the practicability is high.

Description

Embedded steel bar positioning and grouting method for PC component construction
Technical Field
The invention relates to the field of PC component construction, in particular to a method for positioning and grouting embedded steel bars in PC component construction.
Background
The existing PC component construction needs the following procedures:
measurement control before hoisting, wallboard hoisting and inner wall steel bar binding, wallboard correction and grouting operation, wall template construction, wall concrete pouring, template dismantling, wall paying-off cleaning, horizontal support erection, horizontal template erection, laminated slab hoisting, electrical reservation pre-embedding construction and cast-in-place floor steel bar binding, and roof concrete pouring. Wherein, hoist and mount and two processes of grout are most important to guaranteeing PC component and major structure joint strength, and the hoist and mount in-process, the location of embedded steel bar is the most crucial.
In the traditional hoisting method, the positioning method of the embedded steel bars comprises the following steps: 1) flat iron and PVC pipe cooperation fixed joint bar, shortcoming: the fixing effect is poor, and the cost is high; 2) the steel bar planting of the steel bar inserted under the conversion layer takes root, and the defects are as follows: the integrity is poor, and the steel bar is easy to deviate; 3) the fixed dowel bar of the positioning steel plate frame has the following defects: the middle hollow part is small, and the vibrating rod is not easy to fall into a wall column. Meanwhile, the methods have the defects of high material cost, complex construction process and the like.
The traditional grouting method is to utilize grouting dead weight to perform grouting, namely grouting materials are injected from the lower row of grouting holes and then blocked after overflowing from the upper row of grouting holes, the last grouting hole in the upper row can be blocked only by the fact that the grouting materials flow out in a columnar shape, secondary pressurization is needed, the grouting materials are wasted, the process is complex, the saturation in a bin is not visible during grouting, and the construction quality cannot be guaranteed.
Disclosure of Invention
The invention aims to provide a positioning and grouting method for embedded steel bars in PC member construction, which has simple process and low construction cost and can effectively ensure the construction quality of PC members.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides a positioning and grouting method of embedded steel bars in PC component construction, which comprises two procedures of positioning and grouting of the embedded steel bars and comprises the following steps:
the first process step: positioning the embedded steel bars, comprising the following steps:
step 1.1: processing a positioning flat iron according to the position of the wallboard grouting sleeve, and forming a plurality of holes for the embedded steel bars to pass through on the positioning flat iron;
step 1.2: welding the positioning flat iron to the corresponding position of the wallboard according to a positioning line;
step 1.3: inserting the embedded steel bars into the holes, and welding the embedded steel bars with the positioning flat iron after the embedded steel bars are subjected to positioning correction;
and a second step: the grouting operation is carried out by adopting a high-position grouting method, and the steps are as follows:
step 2.1: comprehensively checking whether the grouting pore passage is smooth or not;
step 2.2: cleaning the joint of the vertical component and the floor;
step 2.3: sealing the bin by adopting high-strength cement mortar;
step 2.4: pouring the prepared grouting material from the lower discharge hole, plugging the lower discharge hole with a wooden plug after the grouting material is discharged from the lower discharge hole, placing the funnel in the upper discharge hole for continuous grouting, stopping grouting and plugging each grouting hole when the grouting material is discharged from the upper discharge hole and the inner slurry of the funnel is full to more than half, and pulling out the funnel and plugging the upper discharge hole where the funnel is located when the inner slurry of the funnel is not changed after standing, thereby completing grouting.
Optionally, after step 1.3, a plastic pipe sleeve is sleeved outside the embedded steel bar.
Optionally, after the joint of the vertical component and the floor is cleaned up in step 2.2, the surface of the component is fully watered and wetted within 24 hours before grouting, and accumulated water is drained within one hour before grouting.
Optionally, the compressive strength of the plugging material used in step 2.3 is not less than 10 Mpa.
Optionally, in step 1.1, the aperture of the hole is larger than the diameter of the embedded steel bar.
Optionally, the aperture of the hole is 2mm larger than the diameter of the embedded steel bar.
Optionally, in step 2.4, when the grouting material is prepared, firstly, quantitative water and the grouting material are added into the stirring barrel twice, and the stirring is performed uniformly, wherein the stirring time is not less than 3 min.
Optionally, an electric stirrer is used for stirring the water and the grouting material, and the blades cannot be lifted above the liquid level of the grouting material in the stirring process.
Optionally, after the grouting in step 2.4 is finished, the grout on the grouting opening and the surface of the PC component is cleaned, and compared with the prior art, the invention has the following technical effects:
the positioning and grouting method for the embedded steel bars in the PC component construction, provided by the invention, has the advantages of simple process, capability of solving the technical problems of inaccurate positioning of the embedded steel bars in the PC component construction process, waste of slurry in the grouting process, complex operation, high cost and the like, capability of effectively guaranteeing the construction quality of the PC component, and strong practicability.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The present invention will be described in further detail with reference to specific embodiments in order to make the above objects, features and advantages more apparent and understandable.
The first embodiment is as follows:
the embodiment provides a method for positioning and grouting embedded steel bars in PC component construction, which comprises two procedures of positioning and grouting the embedded steel bars, and comprises the following steps:
the first process step: positioning the embedded steel bars, comprising the following steps:
step 1.1: processing a positioning flat iron according to the position of the wall board grouting sleeve, positioning embedded steel bars on the prefabricated wall board of the conversion layer, and forming a plurality of holes for the embedded steel bars to pass through on the positioning flat iron; the aperture of the hole is larger than the diameter of the embedded steel bar, and the aperture of the hole is preferably larger than the diameter of the embedded steel bar by 2mm in the embodiment, so that the accurate positioning of the embedded steel bar is ensured;
step 1.2: welding the positioning flat iron to the corresponding position of the wallboard according to the positioning line;
step 1.3: inserting the embedded steel bars into the holes, and welding the embedded steel bars with the positioning flat irons after the embedded steel bars are subjected to positioning correction;
and a second step: the grouting operation is carried out by adopting a high-position grouting method, which is also called a high-position funnel grouting method, the grouting requirement is met by improving the potential energy difference of the grout, and the concrete steps are as follows:
step 2.1: comprehensively checking whether the grouting pore passage is smooth or not;
step 2.2: cleaning the joint of the vertical component and the floor, ensuring that the surface of the component is fully watered and wetted within 24 hours before grouting, and draining water within one hour before grouting;
step 2.3: sealing the bin by adopting high-strength cement mortar; the compressive strength of the adopted plugging material is not less than 10 Mpa;
step 2.4: pouring the prepared grouting material from the lower discharge hole, plugging the lower discharge hole with a wooden plug after the grouting material is discharged from the lower discharge hole, placing the funnel in the upper discharge hole for continuous grouting, stopping grouting and plugging each grouting hole when the grouting material is discharged from the upper discharge hole and the inner slurry of the funnel is full to more than half, and pulling out the funnel and plugging the upper discharge hole where the funnel is located when the inner slurry of the funnel is not changed after standing, thereby completing grouting.
Further, after the step 1.3, a plastic pipe sleeve is sleeved outside the embedded steel bar, so that pouring pollution is avoided.
Further, in step 2.4, the grouting material is strictly configured according to the mix proportion requirement of the product specification, quantitative water and the grouting material are firstly added into a stirring barrel twice, the stirring is uniformly carried out through a handheld electric stirrer, the stirring time is not less than 2.5min from the beginning of feeding to the end of stirring, blades cannot be lifted above the liquid level of the grouting material during stirring, air is prevented from being brought in, and the grouting material after stirring is used within 45 min.
And during grouting, adopting high-position grouting, grouting from the lower row of hole sites, plugging the lower row of hole sites with a wooden plug after all grout is discharged, arranging the funnel in the upper row of grout discharge holes, then continuing grouting until all the upper row of holes are discharged, filling the funnel with grout more than half of the grout, pulling out the grouting machine to stop grouting, plugging the grouting holes, pulling out the funnel after the grout in the funnel is not changed after the grout in the funnel is kept stand, and completing grouting by rapid plugging.
Grouting should be carried out continuously, slowly and uniformly, the grouting hole of the single component should be filled continuously at one time until the consistency of the grout discharged from the exhaust pipe is the same as that of the grouting hole, and the grouting hole is closed by adopting a plug after no air bubbles are discharged. And after grouting, cleaning the grout on the grouting opening and the surface of the component in time.
The method for positioning and grouting the embedded steel bars in the PC component construction has simple process, and solves the problem of inaccurate positioning of the embedded steel bars in the PC component construction process; the grouting adopts a high-level funnel grouting method, the grouting compactness requirement is met by utilizing the potential energy difference of the improved grout, the technical problems of grout waste, complex operation, high cost and the like in the grouting process are avoided, the construction quality of the PC component can be effectively guaranteed, and the practicability is high.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.

Claims (8)

1. A positioning and grouting method for embedded steel bars in PC component construction is characterized in that: the method comprises two procedures of positioning the embedded steel bars and grouting, and comprises the following steps:
the first process step: positioning the embedded steel bars, comprising the following steps:
step 1.1: processing a positioning flat iron according to the position of a wallboard grouting sleeve, and forming a plurality of holes for the embedded steel bars to pass through on the positioning flat iron, wherein the hole diameter of each hole is larger than the diameter of each embedded steel bar;
step 1.2: welding the positioning flat iron to the corresponding position of the wallboard according to a positioning line;
step 1.3: inserting the embedded steel bars into the holes, and welding the embedded steel bars with the positioning flat iron after the embedded steel bars are subjected to positioning correction;
and a second step: the grouting operation is carried out by adopting a high-position grouting method, and the steps are as follows:
step 2.1: comprehensively checking whether the grouting pore passage is smooth or not;
step 2.2: cleaning the joint of the vertical component and the floor;
step 2.3: sealing the bin by adopting high-strength cement mortar;
step 2.4: pouring the prepared grouting material from the lower discharge hole, plugging the lower discharge hole with a wooden plug after the grouting material is discharged from the lower discharge hole, placing the funnel in the upper discharge hole for continuous grouting, stopping grouting and plugging each grouting hole when the grouting material is discharged from the upper discharge hole and the inner slurry of the funnel is full to more than half, and pulling out the funnel and plugging the upper discharge hole where the funnel is located when the inner slurry of the funnel is not changed after standing, thereby completing grouting.
2. The method for positioning and grouting embedded steel bars in PC component construction according to claim 1, characterized in that: and step 1.3, sleeving a plastic pipe sleeve outside the embedded steel bar.
3. The method for positioning and grouting embedded steel bars in PC component construction according to claim 1, characterized in that: and 2.2, cleaning the joint of the vertical component and the floor, ensuring that the surface of the component is fully watered and wetted within 24 hours before grouting, and absorbing accumulated water within one hour before grouting.
4. The method for positioning and grouting embedded steel bars in PC component construction according to claim 1, characterized in that: the compressive strength of the plugging material adopted in the step 2.3 is not less than 10 Mpa.
5. The method for positioning and grouting embedded steel bars in PC component construction according to claim 1, characterized in that: the aperture of the hole is 2mm larger than the diameter of the embedded steel bar.
6. The method for positioning and grouting embedded steel bars in PC component construction according to claim 1, characterized in that: in the step 2.4, when the grouting material is prepared, firstly, quantitative water and the grouting material are added into a stirring barrel twice, and the stirring is carried out uniformly for not less than 3 min.
7. The method for positioning and grouting embedded steel bars in PC component construction according to claim 6, characterized in that: an electric stirrer is adopted to stir the water and the grouting material, and the blades cannot be lifted above the liquid level of the grouting material in the stirring process.
8. The method for positioning and grouting embedded steel bars in PC component construction according to claim 1, characterized in that: and 2.4, after grouting is finished, cleaning the grout at the grouting opening and the surface of the PC component.
CN201911189379.4A 2019-11-28 2019-11-28 Embedded steel bar positioning and grouting method for PC component construction Active CN110820990B (en)

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Application Number Priority Date Filing Date Title
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CN110820990B true CN110820990B (en) 2021-01-05

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Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103437372B (en) * 2013-08-13 2016-08-10 广东明阳风电产业集团有限公司 A kind of connecting structure for jacket foundation and underwater pile foundation of offshore wind turbine and grouting method
CN103726653A (en) * 2014-01-08 2014-04-16 成军 Full-prefabricated structure column steel sleeve cylinder grouting connecting construction method
CN105804410B (en) * 2016-05-26 2018-07-27 安徽宇辉新型建筑材料有限公司 Prefabricated concrete structure is vertically connected with dividing storehouse slip casing by pressure method
CN205857530U (en) * 2016-06-08 2017-01-04 成都建筑工程集团总公司 Joint bar positioner
CN106049666A (en) * 2016-08-05 2016-10-26 北京城建建设工程有限公司 Prefabricated assembled concrete structure and construction method thereof
CN109208921A (en) * 2017-07-05 2019-01-15 上海宝冶集团有限公司 The localization method of building element assembled sleeve embedded bar
CN207044389U (en) * 2017-08-15 2018-02-27 中建五局第三建设有限公司 A kind of prefabricated post reserves anchor bar positioner
CN108193702B (en) * 2017-12-28 2020-07-10 中国核工业二四建设有限公司 Combined construction method of grouting material and concrete at bottom of embedded part

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