CN113882706A - Method for anchoring newly-added cantilever beam of shear wall structure after bar planting - Google Patents
Method for anchoring newly-added cantilever beam of shear wall structure after bar planting Download PDFInfo
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- CN113882706A CN113882706A CN202111143153.8A CN202111143153A CN113882706A CN 113882706 A CN113882706 A CN 113882706A CN 202111143153 A CN202111143153 A CN 202111143153A CN 113882706 A CN113882706 A CN 113882706A
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- steel bar
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- bar planting
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- 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
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
- E04G23/0222—Replacing or adding wall ties
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- Reinforcement Elements For Buildings (AREA)
Abstract
The embodiment of the invention discloses a method for anchoring a newly added cantilever beam of a shear wall structure after bar planting, and provides an efficient, economic and simple bar planting mode for the newly added cantilever beam of the shear wall structure. According to the embodiment of the invention, the method that the hole is drilled in the shear wall by diamond and the bolt anchor head is utilized for anchoring is adopted, and the bolt anchor head is screwed in the tail end of the steel bar, so that a good anchoring effect is achieved, the steel bar planting depth is effectively reduced, the construction difficulty is reduced, and the steel bar has a wide application prospect in the field of reinforcement. The method for anchoring the newly added cantilever beam of the shear wall structure after the steel bar planting provided by the embodiment of the invention can effectively meet the requirement of steel bar planting and ensure the safety of the structure, and is simple and convenient to construct and high in operability.
Description
Technical Field
The invention relates to the technical field of building and house reinforcement engineering, in particular to a method for anchoring a newly added cantilever beam of a shear wall structure after bar planting.
Background
As shear wall structures become more widely used, a large portion of the structures are subject to design age expiration, service function adjustment, or repair, and need to be reinforced. In order to make the structure stress more reasonable in the reinforcement process, need newly-increased component often, and bar planting work is newly-increased component very important one step, if the bar planting degree of depth can't satisfy relevant requirement, will influence the safety of whole structure. Therefore, a reasonable and reliable post-bar-planting anchoring method is adopted in the bar planting process, and the method is very important.
The existing bar planting method mainly calculates the bar planting depth according to the standard, and adopts a mode of drilling and bar planting on a member to be planted. But often to some concrete intensity low or the deep condition of the component planting muscle degree of depth of encorbelmenting, the work progress is difficult to be realized, and the drilling process is run into the component internal reinforcement of waiting to plant easily, forms the hole of wasting discharge. When the number of the waste holes is large, the stress section of the original bearing component is easily weakened, and great potential safety hazards exist.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method for anchoring a newly added cantilever beam of a shear wall structure after bar planting, which can effectively ensure the anchoring requirement of the bar planting and ensure the structure safety, and has the advantages of simple and convenient construction and high operability.
The invention specifically comprises the following steps:
step 1, scanning original steel bars in a shear wall, determining the positions of diamond drilling holes, and drilling anchoring holes according to design requirements;
step 4, derusting the steel bars to be embedded with the steel bars, wherein the derusting length is greater than the length of the embedded steel bars;
step 5, when the condition meets the steel bar planting requirement, the steel bar penetrates through the steel bar planting hole, and the bolt anchor head is screwed in the tail end of the steel bar after the steel bar reaches a preset position;
step 6, slowly extracting the prepared bar planting glue by using a glue perfusion device while injecting the glue into the bar planting hole;
and 7, keeping the inserted steel bars from disturbing until the maintenance period of the bar-planting glue is finished.
Further, in the step 2, the aperture of the bar-planting hole meets the requirements in the existing national standard of concrete structure reinforcement design specification GB 50367.
Furthermore, in the step 5, the preset position is a position where the distance from the steel bar planting hole to the steel bar planting hole is greater than the length of the bolt anchor head, and the distance between the tail end of the steel bar and the side wall of the anchoring hole is greater than the length of the bolt anchor head.
Further, in the step 5, the diameter of the bolt head is more than or equal to 2.5 times of the diameter of the steel bar.
Further, the method further comprises:
and 8, after the maintenance period of the bar-planting glue is finished, performing cement-based grouting recovery on the anchoring hole.
Further, the method further comprises:
and 9, sampling the implanted steel bars to perform a drawing test.
Further, the method further comprises:
when the steel bar to be embedded with the steel bars needs to be welded by two or more steel bars, the steel bars are welded firstly and then embedded; if the post welding is necessary, the welding point is more than 15d away from the surface of the base material concrete, and the root of the exposed part of the embedded steel bar is wrapped by a wet towel soaked by ice water, wherein d is the diameter of the steel bar.
The invention has the following advantages:
the method of drilling a diamond hole on the shear wall and anchoring by using the bolt anchor head achieves a good anchoring effect by screwing the bolt anchor head into the tail end of the steel bar, thereby effectively reducing the depth of embedded steel bars, reducing the construction difficulty and having wide application prospect in the field of reinforcement.
Drawings
The invention will be further described with reference to the following examples with reference to the accompanying drawings.
FIG. 1 is a schematic view of an anchoring method after steel bars are planted on newly added cantilever beams;
fig. 2 is a cross-sectional view AA of fig. 1.
Detailed Description
The invention idea is as follows: a method of drilling a hole on the original shear wall and anchoring by using a bolt anchor head is adopted. The bolt anchor head is screwed in the tail end of the steel bar, so that a good anchoring effect is achieved, the steel bar planting depth is effectively reduced, the construction difficulty is reduced, and the steel bar anchoring device has a wide application prospect in the field of reinforcement. And after the anchoring construction is finished, the original shear wall structure is restored by adopting the cement-based grouting material, and the bearing capacity of the structure before construction is restored is ensured by utilizing the advantages of good fluidity and high strength of the cement-based grouting material.
The embodiment of the invention provides a method for anchoring a newly added cantilever beam of a shear wall structure after bar planting, which comprises the following steps:
step 1, scanning original steel bars in the shear wall 1, determining the positions of diamond drilling holes, and drilling anchoring holes 11 according to design requirements, wherein the diameter of each anchoring hole 11 can be 150 mm.
The anchoring hole 11 may be in communication with one or more tendon-implanting holes 12.
And 3, cleaning the pore channel by using tools such as a blower, a brush and the like until the inner wall of the pore has no floating dust and water stain, and planting the ribs under the condition that the pore wall is dry.
Step 4, the steel bar 2 is required to be straight, the steel bar 2 to be planted with the steel bar is required to be derusted before the steel bar is planted, and the derusting length is longer than the length of the planted steel bar;
step 5, when the conditions meet the requirements of bar planting, the steel bar 2 penetrates through the bar planting hole 12, and the bolt anchor head 3 is screwed in the tail end of the steel bar 2 after the steel bar reaches a preset position;
the preset position is a position which extends out of the reinforcement embedding hole 12 and is longer than the length of the bolt anchor head 3, the distance between the tail end of the steel bar 2 and the side wall of the anchoring hole 11 is longer than the length of the bolt anchor head, the bolt anchor head 3 is convenient to screw in and is firmly connected with the steel bar 2, and the diameter of the bolt anchor head 3 is more than or equal to 2.5 times of the diameter of the steel bar 2.
When the steel bar 2 to be embedded with the steel bars needs to be welded by two or more steel bars, the steel bars are welded firstly and then embedded; if the post welding is necessary, the welding point is more than 15d away from the surface of the base material concrete, and the root of the exposed part of the embedded steel bar is wrapped by a wet towel soaked by ice water, wherein d is the diameter of the steel bar.
Step 6, pouring the prepared bar planting glue into the bar planting hole 12 by using a glue injector and slowly extracting the glue while injecting;
and 7, keeping the inserted steel bars 2 from being disturbed again until the maintenance period of the bar planting glue is finished, keeping the inserted steel bars 2 from being disturbed again, and binding and other work can be carried out after the maintenance period of the bar planting glue is finished.
And 8, after the curing period of the bar-planting adhesive is finished, performing cement-based grouting restoration on the anchoring hole 11, restoring the original shear wall structure by adopting the cement-based grouting material, and performing binding and other work.
And 9, sampling the implanted steel bars 2 for drawing test, wherein the environmental temperature of the structure used for a long time is not higher than 60 ℃.
As shown in fig. 1 and 2, a schematic diagram of an anchoring method after reinforcing bars are added to a new cantilever beam of a shear wall structure by using the method of the embodiment of the present invention.
The method adopts the method of drilling a diamond hole on the shear wall, anchoring by using the bolt anchor head and screwing the bolt anchor head into the tail end of the reinforcing steel bar to achieve good anchoring effect, thereby effectively reducing the depth of embedded reinforcing steel bars, reducing the construction difficulty and having wide application prospect in the field of reinforcement.
Although specific embodiments of the invention have been described above, it will be understood by those skilled in the art that the specific embodiments described are illustrative only and are not limiting upon the scope of the invention, and that equivalent modifications and variations can be made by those skilled in the art without departing from the spirit of the invention, which is to be limited only by the appended claims.
Claims (7)
1. A method for anchoring a newly added cantilever beam of a shear wall structure after bar planting is characterized by comprising the following steps:
step 1, scanning original steel bars in a shear wall, determining the positions of diamond drilling holes, and drilling anchoring holes according to design requirements;
step 2, drilling a bar planting hole of a steel bar according to the hole position and the hole depth of the design requirement, wherein the tail end of the bar planting hole is communicated with the anchoring hole, and the hole depth is smaller than that of a conventional bar planting hole;
step 3, cleaning the pore channel until the inner wall of the pore has no floating dust and water stain;
step 4, derusting the steel bars to be embedded with the steel bars, wherein the derusting length is greater than the length of the embedded steel bars;
step 5, when the condition meets the steel bar planting requirement, the steel bar penetrates through the steel bar planting hole, and the bolt anchor head is screwed in the tail end of the steel bar after the steel bar reaches a preset position;
step 6, slowly extracting the prepared bar planting glue by using a glue perfusion device while injecting the glue into the bar planting hole;
and 7, keeping the inserted steel bars from disturbing until the maintenance period of the bar-planting glue is finished.
2. The method of claim 1, wherein: in the step 2, the aperture of the bar planting hole meets the requirements in the existing national standard GB 50367 of concrete structure reinforcement design Specification.
3. The method of claim 1, wherein: in the step 5, the preset position is a position where the distance from the steel bar planting hole to the steel bar planting hole is larger than the length of the bolt anchor head, and the distance between the tail end of the steel bar and the side wall of the anchoring hole is larger than the length of the bolt anchor head.
4. The method of claim 1, wherein: in the step 5, the diameter of the bolt anchor head is more than or equal to 2.5 times of the diameter of the steel bar.
5. The method of claim 1, wherein: the method further comprises the following steps:
and 8, after the maintenance period of the bar-planting glue is finished, performing cement-based grouting recovery on the anchoring hole.
6. The method of claim 1, wherein: the method further comprises the following steps:
and 9, sampling the implanted steel bars to perform a drawing test.
7. The method of claim 1, further comprising:
when the steel bar to be embedded with the steel bars needs to be welded by two or more steel bars, the steel bars are welded firstly and then embedded; if the post welding is necessary, the welding point is more than 15d away from the surface of the base material concrete, and the root of the exposed part of the embedded steel bar is wrapped by a wet towel soaked by ice water, wherein d is the diameter of the steel bar.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111143153.8A CN113882706A (en) | 2021-09-28 | 2021-09-28 | Method for anchoring newly-added cantilever beam of shear wall structure after bar planting |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111143153.8A CN113882706A (en) | 2021-09-28 | 2021-09-28 | Method for anchoring newly-added cantilever beam of shear wall structure after bar planting |
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| CN113882706A true CN113882706A (en) | 2022-01-04 |
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| CN202111143153.8A Pending CN113882706A (en) | 2021-09-28 | 2021-09-28 | Method for anchoring newly-added cantilever beam of shear wall structure after bar planting |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20160123688A (en) * | 2015-04-16 | 2016-10-26 | 한양대학교 산학협력단 | RC Coupling Beam Reinforcement Structure Using Multi-headed Steel Elements |
| CN111042007A (en) * | 2019-12-10 | 2020-04-21 | 汪又菊 | Planting rib anchoring method |
| CN210598228U (en) * | 2019-08-02 | 2020-05-22 | 中国建筑第八工程局有限公司 | Split type bar planting anchor structure |
| CN113175236A (en) * | 2021-05-18 | 2021-07-27 | 宁波市建设集团股份有限公司 | Novel injection method chemical bar planting construction method |
-
2021
- 2021-09-28 CN CN202111143153.8A patent/CN113882706A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20160123688A (en) * | 2015-04-16 | 2016-10-26 | 한양대학교 산학협력단 | RC Coupling Beam Reinforcement Structure Using Multi-headed Steel Elements |
| CN210598228U (en) * | 2019-08-02 | 2020-05-22 | 中国建筑第八工程局有限公司 | Split type bar planting anchor structure |
| CN111042007A (en) * | 2019-12-10 | 2020-04-21 | 汪又菊 | Planting rib anchoring method |
| CN113175236A (en) * | 2021-05-18 | 2021-07-27 | 宁波市建设集团股份有限公司 | Novel injection method chemical bar planting construction method |
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Inventor after: Xu Chao Inventor after: Li Bingming Inventor after: Fang Pengpeng Inventor after: Wu Wenlong Inventor before: Li Bingming Inventor before: Fang Pengpeng Inventor before: Wu Wenlong |
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Application publication date: 20220104 |