CN114352002A - Handling method for placing scaffold cantilever beam on shear wall - Google Patents

Handling method for placing scaffold cantilever beam on shear wall Download PDF

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Publication number
CN114352002A
CN114352002A CN202111671042.4A CN202111671042A CN114352002A CN 114352002 A CN114352002 A CN 114352002A CN 202111671042 A CN202111671042 A CN 202111671042A CN 114352002 A CN114352002 A CN 114352002A
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China
Prior art keywords
shear wall
steel bars
scaffold
embedded
cantilever
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Pending
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CN202111671042.4A
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Chinese (zh)
Inventor
陈成
张爱梅
郝建晋
姚闯
张文豪
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MCC Tiangong Group Corp Ltd
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MCC Tiangong Group Corp Ltd
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Priority to CN202111671042.4A priority Critical patent/CN114352002A/en
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Abstract

The invention provides a method for disposing scaffold cantilever beams on a shear wall, which comprises the following steps: installing shear wall reinforcing steel bars in a shear wall at the bottom of a scaffold cantilever beam, and installing embedded reinforcing steel bars on cantilever beam embedded parts; connecting embedded steel bars on the cantilever beam embedded part with the shear wall steel bars close to the embedded steel bars, and then pouring concrete on the lower layer of the cantilever beam embedded part; inserting one end of the scaffold outrigger into the outrigger embedded part; placing cantilever layer shear wall templates on two sides of the cantilever beam embedded part, then carrying out concrete pouring on the cantilever layer shear wall, and dismantling the cantilever layer shear wall templates when the template removing conditions are met after the concrete pouring is finished. The invention has the advantages that the prefabricated steel bars on the outrigger embedded part can be bound and connected with the steel bars of the wall body of the shear wall, the disturbance of the steel bars of the shear wall is avoided, the stability of the structure is not influenced, the manufacture is simple, the installation and the removal operation are convenient, the labor cost is reduced, and the working efficiency is improved.

Description

Handling method for placing scaffold cantilever beam on shear wall
Technical Field
The invention belongs to the technical field of construction engineering construction, and particularly relates to a disposal method for placing scaffold cantilever beams on a shear wall.
Background
In order to improve the land utilization rate, civil buildings are continuously developed towards a high form in recent years, overhanging type scaffolds are absolutely required in construction, and in the condition that overhanging scaffold outrigger I-steel is arranged at a shear wall, a reserved hole needs to be formed in the shear wall for placing the I-steel. When the shear wall template is constructed, the difficulty of template reinforcement and the risk of later-stage plugging leakage are increased due to more reserved holes.
The construction method for arranging the reserved hole when the cantilever beam of the conventional scaffold penetrates through the shear wall comprises the following steps: the bottom of the shear wall is reserved with a prefabricated template square box and directly adopts a pre-embedded foam shower plate. The method is characterized in that holes are reserved in the square template boxes, namely, the square prefabricated template boxes are placed at the positions of the embedded I-shaped steel of the shear wall, and then the templates of the shear wall are constructed. The method is characterized in that a hole is reserved by embedding foam boards, namely, the foam boards are placed at a designated position, then templates of the shear wall are constructed, the templates of the shear wall are erected according to a conventional method, and after concrete is poured and the templates of the shear wall are removed, the templates or the foam boards at the reserved hole are removed.
The conventional construction method has the following disadvantages: 1. the joint of the shear wall template and the prefabricated template square box cannot be effectively connected and reinforced, and the embedded box is easily damaged during concrete pouring;
2. the foam board is adopted to replace a prefabricated template square box for use, when concrete is vibrated, the foam board is easy to vibrate and smash, broken foam boards are easy to enter a wall body, concrete is easy to flow into a reserved hole, and potential quality hazards are brought to engineering;
3. after the shear wall is constructed, the foam board and the embedded square box in the reserved hole of the overhanging scaffold are difficult to clean, the labor input is large, and the construction cost is increased;
4. in order to meet the accuracy of the position of the cantilever beam of the scaffold, the position of the embedded template square box or the embedded foam plate often causes position deviation on longitudinal steel bars or horizontal steel bars of the shear wall, so that the structural stress is influenced;
5. the two methods are adopted for construction, the difficulty in plugging the reserved hole is high, plugging is easy and not dense, and the leakage risk is high.
Disclosure of Invention
The invention aims to solve the problem of providing a method for disposing a scaffold cantilever beam on a shear wall, which effectively solves the problem that the conventional construction method is easy to damage a pre-buried box during concrete pouring or easily smashes a foam board by vibration, the broken foam board is easy to enter a wall body, and concrete is easy to flow into a reserved hole, so that potential quality hazards are brought to engineering; the position of the embedded template square box or the embedded foam plate often causes position deviation on longitudinal steel bars or horizontal steel bars of the shear wall, so that the structural stress is influenced; and finally, the difficulty of plugging the reserved hole after construction is high, plugging is easy to be not compact, and leakage risk is high.
In order to solve the technical problems, the invention adopts the technical scheme that: a method for disposing scaffold outriggers on a shear wall comprises the following steps:
installing shear wall reinforcing steel bars in a shear wall at the bottom of a scaffold cantilever beam, and installing embedded reinforcing steel bars on cantilever beam embedded parts;
connecting embedded steel bars on the cantilever beam embedded part with the shear wall steel bars close to the embedded steel bars, and then pouring concrete on the lower layer of the cantilever beam embedded part;
after the concrete on the lower layer of the outrigger embedded part is finally set, moving the scaffold outrigger to a specified position, and inserting one end of the scaffold outrigger into the outrigger embedded part;
placing cantilever layer shear wall templates on two sides of the cantilever beam embedded parts, then carrying out concrete pouring on the cantilever layer shear wall, dismantling the cantilever layer shear wall templates when formwork stripping conditions are met after the concrete pouring is finished, and completing the installation of the scaffold cantilever beam.
Preferably, in the process of installing the shear wall reinforcing steel bars in the shear wall at the bottom of the cantilever beam of the scaffold, the shear wall reinforcing steel bars comprise first shear wall reinforcing steel bars and second shear wall reinforcing steel bars, the first shear wall reinforcing steel bars are vertically installed in the bottom shear wall, the second shear wall reinforcing steel bars are perpendicular to the first shear wall reinforcing steel bars, and the second shear wall reinforcing steel bars are arranged on one side of the top of the bottom shear wall and do not contact with the bottom shear wall.
Preferably, in the process of installing embedded steel bars on the outrigger embedded part, the embedded steel bars comprise first embedded steel bars and second embedded steel bars, the first embedded steel bars are vertically installed on the outrigger embedded part, and the second embedded steel bars are perpendicular to the first embedded steel bars; and the first embedded steel bars and the second embedded steel bars are bound and fixed with the first shear wall steel bars and the second shear wall steel bars which are close to each other.
Preferably, the first embedded steel bars and the second embedded steel bars are all through long steel bars.
Preferably, the scaffold cantilever is moved to a specified position, in the process that one end of the scaffold cantilever is inserted into the cantilever embedded part, the scaffold cantilever is hoisted to the position with the same height as the cantilever embedded part, then one end of the scaffold cantilever is inserted into the cantilever embedded part, and the other end of the scaffold cantilever is fixed by anchoring.
Preferably, a through hole is formed in the outrigger embedded part, and one end of the scaffold outrigger is inserted into the through hole.
Preferably, a groove for placing the cantilever embedded part is formed in the cantilever layer shear wall template, and the groove is larger than the through hole and smaller than the cantilever embedded part.
Preferably, a water stopping groove is further formed in the center of the cantilever beam embedded part, and the through hole is prevented from leaking.
Preferably, the formwork removing condition is that when the strength of concrete is greater than 1.2MPa, the cantilever layer shear wall formwork is removed.
Preferably, when the scaffold outrigger is not used any more, the scaffold outrigger is drawn out, and then the through hole gap is sealed, and the scaffold outrigger is removed.
By adopting the technical scheme, the prefabricated steel bars on the cantilever beam embedded part can be bound and connected with the steel bars of the wall body of the shear wall, the disturbance of the steel bars of the shear wall is avoided, the stability of the structure is not influenced, the manufacturing is simple, the installation and the removal operations are convenient, the labor cost is reduced, and the working efficiency is improved.
By adopting the technical scheme, the water stopping groove is additionally arranged in the cantilever beam embedded part, the size of the reserved hole through hole is greatly reduced, and the risk of leakage of the embedded part through hole is reduced; because the invention does not adopt a foam board, the invention can not cause environmental pollution and meet the requirement of environmental protection.
Drawings
FIG. 1 is a schematic front view of a method for disposing a scaffold cantilever beam on a shear wall according to an embodiment of the invention
FIG. 2 is a schematic view of an installation side of a method for disposing scaffold outriggers on a shear wall according to an embodiment of the invention
In the figure:
1. first shear wall reinforcing steel bar 2, second shear wall reinforcing steel bar 3 and first embedded reinforcing steel bar
4. Second embedded steel bar 5, cantilever embedded part 6 and through hole
7. Water stopping tank
Detailed Description
The invention is further illustrated by the following examples and figures:
in the description of the embodiments of the present invention, it should be understood that the terms "top," "bottom," and the like refer to orientations and positional relationships illustrated in the drawings, which are used for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present invention. In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as a fixed connection, a detachable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
As shown in fig. 1, a schematic diagram of a front installation surface of a method for disposing scaffold outriggers on a shear wall and fig. 2, a schematic diagram of a side installation surface of a method for disposing scaffold outriggers on a shear wall, a method for disposing scaffold outriggers on a shear wall includes:
s1: installing shear wall reinforcing steel bars in a shear wall at the bottom of the outrigger of the scaffold, and installing embedded reinforcing steel bars on the outrigger embedded part 5; wherein,
in the process of installing the shear wall reinforcing steel bars in the shear wall at the bottom of the cantilever beam of the scaffold, the shear wall reinforcing steel bars comprise first shear wall reinforcing steel bars 1 and second shear wall reinforcing steel bars 2, the first shear wall reinforcing steel bars 1 are vertically installed in the shear wall at the bottom, the second shear wall reinforcing steel bars 2 are perpendicular to the first shear wall reinforcing steel bars 1, and the second shear wall reinforcing steel bars 2 are arranged on one side of the top of the shear wall at the bottom and do not contact with the shear wall at the bottom.
Before the embedded steel bars are installed on the outrigger embedded parts, the sizes of the outrigger embedded parts 5 and the through holes 6 in the middle of the embedded parts are determined according to the specification and the size of the designed scaffold outriggers by generally adopting 16-type I-shaped steel, the thickness of the outrigger embedded parts 5 is equal to that of a shear wall, the outer contour of the cross section is rectangular, the through holes 6 in the middle of the outrigger embedded parts 5 are I-shaped, preferably, the central size of the through holes 6 is equal to that of the outrigger I-shaped steel, the width of the through holes 6 is 20mm, the outer contour size of the outrigger embedded parts 5 is 50mm outside the middle I-shaped through holes,
in the process of installing embedded steel bars on the outrigger embedded part, the embedded steel bars comprise first embedded steel bars 3 and second embedded steel bars 4, the first embedded steel bars 3 are vertically installed on the outrigger embedded part 5, and the second embedded steel bars 4 are vertically arranged with the first embedded steel bars 3; first embedded steel bar 3 and second embedded steel bar 4 carry out the ligature with first shear force wall reinforcing bar 1 and second shear force wall reinforcing bar 2 that are close to fixedly, and first embedded steel bar 3 and the length that leaks of second embedded steel bar 4 satisfy standard overlap length (the embedded steel bar model is unanimous with shear force wall reinforcing bar design).
In some possible embodiments, the first embedded steel bars 3 and the second embedded steel bars 4 are all long steel bars.
In some possible embodiments, a water stopping groove 7 is arranged in the center of the thickness of the cantilever embedded part 5, the shape of the water stopping groove 7 is preferably annular, and preferably, the width and the depth of the water stopping groove 7 are both 10 mm.
S2: connecting embedded steel bars on the cantilever beam embedded part 5 with shear wall steel bars close to the embedded steel bars, and then pouring concrete on the lower layer of the cantilever beam embedded part 5; wherein,
and (3) binding, connecting and fixing the first embedded steel bars 3 of the outrigger embedded part 5 and the second shear wall steel bars 2 firmly, binding and fixing the second embedded steel bars 4 of the outrigger embedded part 5 and the corresponding positions of the first shear wall steel bars 1 firmly, and then pouring concrete on the lower layer of the outrigger embedded part 5.
S3: after the concrete on the lower layer of the outrigger embedded part is finally set, moving the outrigger of the scaffold to a specified position, and inserting one end of the outrigger of the scaffold into the outrigger embedded part; wherein,
the scaffold cantilever beam is moved to a designated position, in the process that one end of the scaffold cantilever beam is inserted into the cantilever embedded part 5, the scaffold cantilever beam is hoisted to the position with the same height as the through hole 6 of the cantilever embedded part 5, then one end of the scaffold cantilever beam is inserted into the cantilever embedded part 5, and the other end of the scaffold cantilever beam is fixed by anchoring.
S4: placing cantilever layer shear wall templates on two sides of the cantilever beam embedded part, then performing concrete pouring on the cantilever layer shear wall, dismantling the cantilever layer shear wall templates when the template removing condition is met after the pouring is finished, completing the scaffold cantilever beam installation, wherein,
a groove for placing the outrigger embedded part 5 is formed in the overhanging layer shear wall template, and the size of the groove is at least larger than that of a through hole 6 in the outrigger embedded part 5 and smaller than that of the outrigger embedded part 5; preferably, each side of the size of the groove is smaller than the size of the embedded part by 20mm, so that the shear wall template is tightly attached to the embedded part, the slurry leakage is avoided, and concrete pouring can be carried out after the shear wall template of the overhanging layer is reinforced according to the conventional construction process;
and the formwork removal condition is that when the strength of the concrete is more than 1.2MPa, the cantilever layer shear wall formwork is removed.
S5: when the scaffold outrigger is not used any more, the scaffold outrigger is drawn out, then the gap of the through hole 6 is sealed, and the scaffold outrigger is removed.
The invention has the beneficial effects that:
1. can be connected with the reinforcement of the shear wall body, avoids the reinforcement disturbance of the shear wall and does not influence the stability of the structure.
2. The material is easy to obtain, the manufacturing is simple, the installation and the removal are convenient, the labor cost is reduced, and the working efficiency is improved.
3. Because the built-in fitting waterstop groove is additionally arranged, the size of the reserved hole is greatly reduced, and the leakage risk of the hole opening of the built-in fitting is reduced.
4. Because no foam board is adopted, no environmental pollution is caused, and the requirement of environmental protection is met.
The embodiments of the present invention have been described in detail, but the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.

Claims (10)

1. A method for disposing scaffold outriggers on a shear wall comprises the following steps:
installing shear wall reinforcing steel bars in a shear wall at the bottom of a scaffold cantilever beam, and installing embedded reinforcing steel bars on cantilever beam embedded parts;
connecting embedded steel bars on the cantilever beam embedded part with the shear wall steel bars close to the embedded steel bars, and then pouring concrete on the lower layer of the cantilever beam embedded part;
after the concrete on the lower layer of the outrigger embedded part is finally set, moving the scaffold outrigger to a specified position, and inserting one end of the scaffold outrigger into the outrigger embedded part;
placing cantilever layer shear wall templates on two sides of the cantilever beam embedded parts, then carrying out concrete pouring on the cantilever layer shear wall, dismantling the cantilever layer shear wall templates when formwork stripping conditions are met after the concrete pouring is finished, and completing the installation of the scaffold cantilever beam.
2. The method for disposing scaffold outriggers on a shear wall according to claim 1, wherein: in the process of installing the shear wall reinforcing steel bars in the shear wall at the bottom of the cantilever beam of the scaffold, the shear wall reinforcing steel bars comprise first shear wall reinforcing steel bars and second shear wall reinforcing steel bars, the first shear wall reinforcing steel bars are vertically installed in the bottom shear wall, the second shear wall reinforcing steel bars are perpendicular to the first shear wall reinforcing steel bars, and the second shear wall reinforcing steel bars are arranged on one side of the top of the bottom shear wall and do not contact with the bottom shear wall.
3. The method for disposing scaffold outriggers on a shear wall according to claim 2, wherein: in the process of installing embedded steel bars on the outrigger embedded part, the embedded steel bars comprise first embedded steel bars and second embedded steel bars, the first embedded steel bars are vertically installed on the outrigger embedded part, and the second embedded steel bars are perpendicular to the first embedded steel bars; and the first embedded steel bars and the second embedded steel bars are bound and fixed with the first shear wall steel bars and the second shear wall steel bars which are close to each other.
4. The method for disposing scaffold outriggers on a shear wall according to claim 3, wherein: the first embedded steel bars and the second embedded steel bars are all long steel bars.
5. The method for disposing scaffold outriggers on a shear wall according to claim 1, wherein: and moving the scaffold cantilever to an appointed position, hoisting the scaffold cantilever to a position with the same height as the cantilever embedded part in the process of inserting one end of the scaffold cantilever into the cantilever embedded part, then inserting one end of the scaffold cantilever into the cantilever embedded part, and fixing the other end of the scaffold cantilever by using an anchor.
6. The method for disposing scaffold outriggers on a shear wall according to claim 5, wherein: a through hole is formed in the outrigger embedded part, and one end of the scaffold outrigger is inserted into the through hole.
7. The method for disposing scaffold outriggers on a shear wall according to claim 6, wherein: the cantilever layer shear wall template is provided with a groove for placing the cantilever embedded part, and the groove is larger than the through hole and smaller than the cantilever embedded part.
8. The method for disposing a scaffold cantilever beam on a shear wall according to any one of claim 6, wherein: and a water stopping groove is further formed in the center of the cantilever beam embedded part to prevent the through hole from leaking.
9. The method for disposing scaffold outriggers on a shear wall according to claim 1, wherein: and the formwork removal condition is that when the concrete strength is larger than 1.2MPa, the cantilever layer shear wall formwork is removed.
10. The method for disposing scaffold outriggers on a shear wall according to claim 1, wherein: and when the scaffold outrigger is not used any more, the scaffold outrigger is drawn out, then the through hole gap is sealed, and the scaffold outrigger is removed.
CN202111671042.4A 2021-12-31 2021-12-31 Handling method for placing scaffold cantilever beam on shear wall Pending CN114352002A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114961211A (en) * 2022-07-04 2022-08-30 龙元建设集团股份有限公司 Building outer wall construction structure and building outer wall construction method

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102733604A (en) * 2012-07-12 2012-10-17 中国建筑第八工程局有限公司 Reusable overhanging scaffold embedded ring and construction method thereof
CN203640257U (en) * 2013-11-12 2014-06-11 上海建工五建集团有限公司 Support of overhanging type scaffold
CN111851987A (en) * 2020-08-30 2020-10-30 陕西建工第一建设集团有限公司 Construction method of attached short-limb I-steel flower basket pull rod knot type cantilever frame
CN113323359A (en) * 2021-05-07 2021-08-31 中建新疆建工(集团)有限公司 Novel flower basket pull rod tool type overhanging frame construction method
CN113719109A (en) * 2021-09-06 2021-11-30 中国建筑第五工程局有限公司 Overhanging I-steel single-anchor buried construction method for external shear wall

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102733604A (en) * 2012-07-12 2012-10-17 中国建筑第八工程局有限公司 Reusable overhanging scaffold embedded ring and construction method thereof
CN203640257U (en) * 2013-11-12 2014-06-11 上海建工五建集团有限公司 Support of overhanging type scaffold
CN111851987A (en) * 2020-08-30 2020-10-30 陕西建工第一建设集团有限公司 Construction method of attached short-limb I-steel flower basket pull rod knot type cantilever frame
CN113323359A (en) * 2021-05-07 2021-08-31 中建新疆建工(集团)有限公司 Novel flower basket pull rod tool type overhanging frame construction method
CN113719109A (en) * 2021-09-06 2021-11-30 中国建筑第五工程局有限公司 Overhanging I-steel single-anchor buried construction method for external shear wall

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114961211A (en) * 2022-07-04 2022-08-30 龙元建设集团股份有限公司 Building outer wall construction structure and building outer wall construction method

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