CN109235781B - Self-centering structure and method for connecting prefabricated part steel bars through grouting sleeve - Google Patents
Self-centering structure and method for connecting prefabricated part steel bars through grouting sleeve Download PDFInfo
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- CN109235781B CN109235781B CN201811232521.4A CN201811232521A CN109235781B CN 109235781 B CN109235781 B CN 109235781B CN 201811232521 A CN201811232521 A CN 201811232521A CN 109235781 B CN109235781 B CN 109235781B
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- grouting
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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
- E04C5/165—Coaxial connection by means of sleeves
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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
- E04C5/18—Spacers of metal or substantially of metal
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- Structural Engineering (AREA)
- Reinforcement Elements For Buildings (AREA)
Abstract
The invention discloses a self-centering construction and a manufacturing method for connecting a prefabricated part and a steel bar by a grouting sleeve, belonging to the field of prefabricated reinforced concrete structural engineering. The lower end of the steel bar extended from the precast concrete component is provided with a thread with a certain length for installing the nut with the elastic steel sheet. The three elastic steel sheets are 120 degrees in the horizontal direction, the three elastic steel sheets are conical in space, the radius of the inner end of each elastic steel sheet is consistent with that of the nut, the radius of the outer end of each elastic steel sheet is consistent with the inner diameter of the concave part of the sleeve, and the maximum outer diameter of each conical elastic steel sheet is larger than or equal to the inner diameter of the concave part of the grouting sleeve. In the precast concrete component assembling process, the elastic steel sheet can guarantee that the reinforcing steel bar is in grouting sleeve central position as far as possible, and then guarantee going on smoothly of grout and the closely knit degree of the interior slurry of sleeve. The invention has simple structure and convenient construction, and can be widely applied to the grouting sleeve connection reinforced concrete prefabricated structure.
Description
Technical Field
The invention relates to a method for self-centering a steel bar in the assembly construction of a grouting sleeve connection prefabricated part, in particular to a self-centering structure and a method for connecting the steel bar of the grouting sleeve connection prefabricated part, and belongs to the technical field of assembly type building construction.
Background
At present, the fabricated building has the advantages of being fast in installation and construction, reducing labor cost, saving energy, protecting environment and the like, accords with the basic concept of sustainable development, and meets the requirements of transformation and upgrading of the current building industry. The prefabricated concrete structure has indispensable seams and joints, and the prefabricated parts are connected into a whole, so that the whole structure has necessary bearing capacity and earthquake resistance. Therefore, the node and the joint connection which are reasonable in stress and convenient to construct are key technologies of the prefabricated concrete structure, and the popularization and the application of the prefabricated concrete structure are influenced.
The most widely used and reliable steel bar connection method of prefabricated concrete structures is sleeve grouting connection. The sleeve grouting connection technology is used as a main connection mode of longitudinal bars in the prefabricated concrete member, has high tensile strength, compressive strength and connection reliability, and is widely applied. The sleeve grouting connection technology is characterized in that a high-strength circular sleeve with concave-convex parts inside is inserted from one end part by connecting longitudinal ribs, and then high-strength grouting material is injected to firmly combine the sleeve and the connected longitudinal ribs into a whole. The plumpness of the grout material of prefabricated concrete structure sleeve grout connection is one of the difficult problem that needs to solve in field construction urgently all the time, and the plumpness of grout material is relevant with the position of inserting the reinforcing bar again, and reinforcing bar position skew center or move can make the grout material inhomogeneous even grout not full condition take place, so research and development a novel method of assembly reinforcing bar becomes especially necessary.
The method for fixing the reinforcing steel bars is applied to grouting sleeves, which is inspired by clip type conical anchors. The self-centering structure and the self-centering method for the steel bar of the grouting sleeve connection prefabricated part are developed, the nut with the elastic steel sheet is screwed on the lower portion of the steel bar with the threads, the nut with the elastic steel sheet effectively enables the steel bar to be located at the center of the nut, the cone formed by the three steel sheets on the nut with the elastic steel sheet enables the whole nut with the elastic steel sheet to be located at the center in the insertion sleeve, therefore, the center of the steel bar in the grouting sleeve is guaranteed, and the grouting material in the grouting sleeve is enabled to be uniform and full to the maximum degree. The three steel sheets with higher rigidity are conical in the grouting sleeve, thereby effectively relieving the steel bar from being pulled out of the grouting sleeve, improving the tensile strength of the grouting sleeve,
disclosure of Invention
The invention aims to improve the current situations of steel bar deviation, the compactness of a slurry body in a sleeve and easy pulling of the steel bar in the existing steel grouting sleeve, and provides a self-centering structure and a manufacturing method for connecting a prefabricated member steel bar by the grouting sleeve. When the prefabricated reinforced concrete member is assembled, the nut with the elastic steel sheet is fixed at the proper position of the reserved steel bar of the prefabricated member, the steel bar can be automatically positioned at the axis position in the installation process, the steel bar is positioned at the central position of the sleeve in the assembly process of the prefabricated reinforced concrete member to the maximum extent, the compactness of the grouting material is further ensured, and the tensile strength of the grouting sleeve connecting steel bar is enhanced.
In order to achieve the purpose, the invention adopts the technical scheme that:
a self-centering structure and a manufacturing method for connecting a prefabricated part and a steel bar by a grouting sleeve comprise a prefabricated concrete part, a grouting sleeve body and a nut with an elastic steel sheet. The precast concrete member comprises a precast member and a pre-buried grouting sleeve, wherein the precast concrete member comprises a precast member and a pre-buried grouting sleeve, and the precast member is reserved for extending a certain length of steel bars of the member. The self-centering structure of the steel bar comprises a reserved extending steel bar with threads at the end part, a nut with an elastic steel sheet and the like.
According to the self-centering structure and the self-centering method for the steel bar of the grouting sleeve connection prefabricated part, the lower end part of the steel bar extending out of the prefabricated concrete part is provided with a certain length of screw thread for installing the nut with the elastic steel sheet. And after the pier stud is straightened, screwing the nut with the elastic steel sheet to a designed position.
According to the self-centering structure and the construction method of the grouting sleeve connection prefabricated part steel bar, the outer wall of the nut with the elastic steel sheets is welded with the three elastic steel sheets with high rigidity, the steel sheets mutually form 120 degrees in the horizontal direction, the elastic steel sheets are conical in space, the radius of the inner end of the elastic steel sheet is consistent with that of the nut, and the radius of the outer end of the elastic steel sheet is consistent with the inner diameter of the concave part of the sleeve.
According to the self-centering structure and the method for connecting the prefabricated member steel bars by the grouting sleeve, the maximum outer diameter of a cone formed by three steel sheets in the nut with the elastic steel sheets is equal to or larger than the inner diameter of the concave part of the grouting sleeve.
Above-mentioned grout muffjoint prefabricated component reinforcing bar is from feeling relieved structure and method, the prefabricated component installation of the reinforcing bar is reserved in the area, and the alignment setting is carried out earlier, waits that the straightness adjustment that hangs down accomplishes the back, twists the nut of taking the elastic steel piece to the design position, inserts pre-buried grout sleeve with the reservation reinforcing bar, then from the mud jacking vacancy mud jacking, the shutoff grout outlet and mud jacking hole after the mud jacking is accomplished.
The invention has the beneficial effects that:
this grout sleeve closes through twisting between the nut of reinforcing bar and area elastic steel piece, three steel sheets on the nut of area elastic steel piece realize to being inserted the centering of reinforcing bar, the phenomenon of the skew of position and moving position behind the traditional reinforcing bar insertion sleeve has been improved, the closely knit degree of grout material and the easy current situation of pulling out of reinforcing bar among the improvement that can be great and the improvement current steel grout sleeve, effectively improve grout sleeve's bearing capacity and anti-seismic performance etc. and the construction is simple, easily installation, the environmental protection.
Drawings
Fig. 1 is a sectional view of a grouted sleeve steel bar after self-centering installation.
Fig. 2 is a schematic diagram of a grouting sleeve steel bar before self-centering installation.
Fig. 3 is a structural diagram of the steel sheet nut and the steel bar.
In the figure: 1-prefabricating a concrete member; 2-sleeve steel bars; 3-grouting the sleeve body; 4-a convex groove; 5-slurry outlet; 6-grouting holes; 7-steel sheet; 8-thread; 9-a nut with an elastic steel sheet; 10-rubber plug.
Detailed Description
The following describes a concrete embodiment of self-centering of the grouting sleeve steel bar for connecting the steel bars according to the present invention with reference to the accompanying drawings:
as shown in fig. 1, 2 and 3, a self-centering structure of a grouting sleeve connection prefabricated part steel bar comprises a prefabricated concrete part 1 and an inserted sleeve steel bar 2 embedded into the prefabricated concrete part 1, a grouting sleeve body 3 is provided with a convex groove 4 in an inner cavity of the grouting sleeve body 3, a grouting hole 6 and a grout outlet 5 are arranged at a steel bar insertion section of the grouting sleeve body 3, three steel plates 7 are welded on a nut 9 which is matched with the sleeve steel bar 2 and is provided with an elastic steel plate, threads 8 are arranged on the lower part of the sleeve steel bar 2 and the inner wall of the nut 9 provided with the elastic steel plate, and a rubber plug 10 is arranged in the sleeve steel bar 2.
As shown in fig. 2, a grout sleeve body 3 is first manufactured using a steel pipe mold, the grooves 4 of the inner wall of the sleeve extend along the circumferential surface, and the manufactured grout sleeve body 3 is prefabricated into a precast concrete member 1. The lower portion of an inserted sleeve steel bar 2 embedded into a precast concrete member 1 is provided with threads 8, the threads are matched with threads on the inner wall of a nut 9 with an elastic steel sheet, the sleeve steel bar 2 is precast into the precast concrete member 1, a steel bar with a certain length is reserved, after the precast is finished, the sleeve steel bar 2 in the precast concrete member 1 is placed into a grouting sleeve 3 through a lifting device to be subjected to preliminary straightening setting, after the straightening setting is finished, the precast concrete member 1 is lifted up through the lifting device, a rubber plug 10 is installed at the central position of the bottom of the intersection of the steel bar 2 and the precast concrete member 1, and the nuts 9 with the elastic steel sheets 2-3 are evenly screwed on the lower portion, with the threads 8, of the sleeve steel bar 2. As shown in fig. 1, a grout outlet 6 and a grout outlet 5 are arranged at two ends of a grouting sleeve 3, then grouting is performed from the grout outlet 6, and the grout outlet 5 and the grout outlet 6 are blocked after grouting is completed.
As shown in fig. 1, in the process of inserting the sleeve steel bar 2 into the grouting sleeve body 3, three steel sheets 7 on the nut 9 with the elastic steel sheets need to overcome the self rigidity and are placed in the grouting sleeve body 3, and because the steel sheets 7 have large rigidity, the three steel sheets 7 enable the sleeve steel bar 2 to be in the center of the sleeve inner cavity in the horizontal and vertical directions in the sleeve, so that the self-centering purpose of the grouting sleeve steel bar is achieved, the compactness of the grouting material in the existing steel grouting sleeve is improved, the grouting is more uniform and full, meanwhile, the steel bar pulling-out needs to overcome the self rigidity of the steel sheets 7 and the work of the steel sheets 7 on overcoming the convex groove 4 of the sleeve inner wall, the phenomenon that the steel bar is easy to pull out in the existing grouting sleeve is improved, and the bearing capacity, the anti-seismic performance and the. And after the installation is finished, grouting and sealing.
The lower end of the steel bar extended from the precast concrete component is provided with a thread with a certain length for mounting a nut with an elastic steel sheet. And after the pier stud is straightened, screwing the nut with the elastic steel sheet to a designed position.
The outer wall of the nut with the elastic steel sheets is welded with three elastic steel sheets with higher rigidity, the steel sheets form an angle of 120 degrees with each other in the horizontal direction, the elastic steel sheets are in a conical shape in space, the radius of the inner end of the elastic steel sheets is consistent with that of the nut, and the radius of the outer end of the elastic steel sheets is consistent with the inner diameter of the concave part in the sleeve.
The maximum outer diameter of a cone formed by three steel sheets in the nut with the elastic steel sheets is equal to or larger than the inner diameter of the concave part of the grouting sleeve.
The method comprises the steps of firstly straightening and setting a prefabricated part with reserved steel bars before installation, screwing a nut with an elastic steel sheet to a design position after perpendicularity adjustment is completed, inserting the reserved steel bars into a pre-buried grouting sleeve, then grouting from a grouting cavity, and plugging a grout outlet and a grouting hole after grouting is completed.
The foregoing has described the general principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments of the application described above, which are given by way of illustration of the principles of the present invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (2)
1. The utility model provides a grout muffjoint prefabricated component reinforcing bar is from feeling relieved structure which characterized in that: the grouting sleeve comprises a precast concrete member (1) and an inserted sleeve steel bar (2) embedded into the precast concrete member (1), a grouting sleeve body (3), wherein a convex groove (4) is formed in the inner cavity of the grouting sleeve body (3), a grout pressing hole (6) and a grout outlet hole (5) are formed in the steel bar inserting section of the grouting sleeve body (3), three steel sheets (7) are welded on a nut (9) which is matched with the inserted sleeve steel bar (2) and is provided with elastic steel sheets, threads (8) are formed in the lower part of the inserted sleeve steel bar (2) and the inner wall of the nut (9) provided with the elastic steel sheets, and a rubber plug (10) is installed in the inserted sleeve steel bar (2);
the lower end part of the steel bar extended out of the precast concrete component is provided with a thread with a certain length and is used for installing a nut with an elastic steel sheet; after the pier stud is straightened, screwing the nut with the elastic steel sheet to a designed position;
the steel sheets are mutually 120 degrees in the horizontal direction, the steel sheets are tapered in space, and the radius of the inner end of the steel sheets is consistent with that of the nut;
the maximum outer diameter of a cone formed by three steel sheets in the steel sheet nut is equal to or larger than the inner diameter of the concave part of the grouting sleeve;
before the prefabricated part with the reserved steel bars is installed, straightening is firstly carried out, after the perpendicularity adjustment is finished, the nut with the elastic steel sheet is screwed to a design position, the reserved steel bars are inserted into the pre-buried grouting sleeve, then grouting is carried out from the grouting holes, and the grouting holes are blocked after grouting is finished;
in the process of inserting the inserted sleeve steel bar (2) into the grouting sleeve body (3), three steel sheets (7) on the nut (9) with the elastic steel sheets need to overcome the rigidity of the three steel sheets and are placed in the grouting sleeve body (3), and the three steel sheets (7) enable the inserted sleeve steel bar (2) to be in the center of the inner cavity of the sleeve in the horizontal and vertical directions in the sleeve due to the large rigidity of the three steel sheets (7), so that the purpose of self-centering of the grouting sleeve steel bar is achieved.
2. The construction method for connecting the self-centering structure of the prefabricated member steel bars by using the grouting sleeve as claimed in claim 1 is characterized in that: firstly, manufacturing a grouting sleeve body (3) by using a steel pipe mould, extending a convex groove (4) on the inner wall of the sleeve along the circumferential surface, and prefabricating the manufactured grouting sleeve body (3) into a precast concrete member (1); the lower part of an inserted sleeve steel bar (2) embedded into a precast concrete member (1) is provided with a thread (8), is matched with the thread on the inner wall of the nut (9) with an elastic steel sheet, and then the inserted sleeve steel bar (2) is prefabricated into the precast concrete component (1), a steel bar with a certain length is reserved, after prefabrication is finished, the inserted sleeve steel bar (2) in the precast concrete member (1) is placed into the grouting sleeve body (3) through lifting equipment to be subjected to primary straightening setting, after the straightening setting is finished, the precast concrete member (1) is lifted by the lifting equipment, the rubber plug (10) is installed at the center of the bottom of the intersection of the inserted sleeve steel bar (2) and the precast concrete member (1), and 2-3 nuts (9) with elastic steel sheets are uniformly screwed on the lower part with threads (8) of the inserted sleeve steel bar (2); the grouting sleeve is characterized in that a grouting hole (6) and a grout outlet (5) are formed in two ends of the grouting sleeve body (3), grouting is conducted from the grouting hole (6), and the grout outlet (5) and the grouting hole (6) are plugged after grouting is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811232521.4A CN109235781B (en) | 2018-10-22 | 2018-10-22 | Self-centering structure and method for connecting prefabricated part steel bars through grouting sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811232521.4A CN109235781B (en) | 2018-10-22 | 2018-10-22 | Self-centering structure and method for connecting prefabricated part steel bars through grouting sleeve |
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| Publication Number | Publication Date |
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| CN109235781A CN109235781A (en) | 2019-01-18 |
| CN109235781B true CN109235781B (en) | 2021-03-16 |
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| CN201811232521.4A Active CN109235781B (en) | 2018-10-22 | 2018-10-22 | Self-centering structure and method for connecting prefabricated part steel bars through grouting sleeve |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109881844A (en) * | 2019-04-18 | 2019-06-14 | 王玉峰 | Smear cream formula reinforcing bar connection component and the connection method applied to the assembly of PC component |
| CN110374265B (en) * | 2019-08-19 | 2024-03-19 | 甘肃省第八建设集团有限责任公司 | Assembled concrete half grouting sleeve connection and construction control method |
| CN111236537B (en) * | 2020-02-06 | 2021-09-28 | 中建三局第一建设工程(上海)有限责任公司 | Reinforced concrete cover reinforced structure |
| CN111733984A (en) * | 2020-06-04 | 2020-10-02 | 广州地铁设计研究院股份有限公司 | Outer plug type assembled station connecting device |
| CN113047529B (en) * | 2021-03-24 | 2022-06-10 | 长安大学 | Grouting sleeve inserted steel bar positioning device and using method thereof |
| CN114045985A (en) * | 2021-08-20 | 2022-02-15 | 北京工业大学 | Steel bar structure capable of realizing self-centering of sleeve steel bars and manufacturing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR101121931B1 (en) * | 2009-03-30 | 2012-04-03 | 엘케이테크 주식회사 | Reinforcing rod a coupling device. |
| KR101121948B1 (en) * | 2009-04-15 | 2012-04-03 | 엘케이테크 주식회사 | reinforcing rod a coupling device. |
| CN206591735U (en) * | 2017-03-10 | 2017-10-27 | 天津力达科创金属制品有限公司 | A kind of half grout sleeve of bar connecting |
| CN108301568B (en) * | 2018-01-31 | 2019-07-26 | 合肥建工集团有限公司 | A kind of assembling structure of assembly concrete component |
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