CN112411887B - Preparation method of multistage embedded prefabricated part of steel bar grouting sleeve connecting joint - Google Patents
Preparation method of multistage embedded prefabricated part of steel bar grouting sleeve connecting joint Download PDFInfo
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- CN112411887B CN112411887B CN202011362437.1A CN202011362437A CN112411887B CN 112411887 B CN112411887 B CN 112411887B CN 202011362437 A CN202011362437 A CN 202011362437A CN 112411887 B CN112411887 B CN 112411887B
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- guide cylinder
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- grouting sleeve
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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
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Abstract
The invention provides a preparation method of a multistage embedded prefabricated part of a steel bar grouting sleeve connecting joint, which comprises the following steps of: preparing a bench formwork, and arranging a steel bar (10) in the bench formwork; connecting grouting sleeves (8) at the bottom ends of the steel bars, arranging magnetic guide cylinders at the bottoms of partial grouting sleeves (8) to enable the positions of the grouting sleeves (8) not to be at the same height, and staggering the pre-buried grouting sleeves (8); after the pre-buried position of the grouting sleeve (8) is set, concrete is poured; after the concrete is solidified, the magnetic guide cylinder is drawn out, a cavity communicated with the outside is formed at the bottom of the grouting sleeve (8), a multi-stage embedded prefabricated part of the connection joint of the steel bar grouting sleeve is obtained, and the magnetic guide cylinder is recycled. The method can well realize the vertical dislocation connection of the prefabricated shear wall, meets the specified requirements, is simple in construction mode and convenient to disassemble, and the magnetic guide cylinder can be recycled.
Description
Technical Field
The invention relates to the field of assembly type buildings, in particular to a preparation method of a multistage embedded prefabricated part of a steel bar grouting sleeve connecting joint.
Background
The requirements of the GB50010 on the area percentage of the tensioned steel bar lap joint in the same connecting section for the steel bar connection of the reinforced concrete structure are as follows: for wall members, the content is not more than 25%; for column members, it is not suitable to be larger than 50%, and the splicing position of wall, column and prefabricated member can be properly widened. At present, the half-grouting sleeve connection steel bar joint of the assembled vertical stressed precast concrete member is generally pre-buried in the same connection section of a frame column or a shear (anti-seismic) wall of the vertical precast member, and under the action of repeated horizontal load, particularly under the action of seismic load, if the half-grouting sleeve connection joint of an individual steel bar fails, huge pressure of failure is brought to other half-grouting sleeve connection joints of the steel bar of the section, so that continuous damage risk is brought to the vertical stressed precast member. Therefore, the steel bar connection mode of the semi-grouting sleeve of the vertical stressed precast concrete member such as an assembled shear wall or a frame column cannot meet the specified requirement of the concrete structure design specification GB50010 in China on the area percentage of the lap joint of the tensile steel bar connected in the same connection section.
A tension steel bar lap joint is one of the difficult problems in construction and treatment of vertical stressed prefabricated components such as an existing assembled shear wall or a frame column, a vertical staggered connection structure (patent grant publication number: CN 210827921U) of the prefabricated shear wall adopts a half grouting sleeve and a long sleeve to realize staggered connection of vertical steel bars, the method needs to process the connection of the half grouting sleeve and the long sleeve, the long sleeve is directly embedded in the prefabricated shear wall, and the processing and installation are troublesome and the cost is high.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a preparation method of a multistage embedded prefabricated part of a steel bar grouting sleeve connecting joint, which can well realize vertical staggered connection of a prefabricated shear wall by arranging a detachable magnetic guide cylinder, meet the specified requirement of concrete structure design specification GB50010 of China on the area percentage of a tensile steel bar lap joint of steel bars connected in the same connecting section, and has the advantages of simple construction mode and recycling of the magnetic guide cylinder.
The method can overcome the defects in the background, can be used for prefabricating the frame concrete column, can effectively solve the problem that the stressed longitudinal bars of the frame column or the shear (anti-seismic) wall of a prefabricated part are in steel bar lap joint in the same connecting section on the structural design level, and improves the anti-seismic performance, the anti-continuous collapse performance and the structural reliability of the assembled structure; the method is simple to operate and low in cost on the construction level.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a preparation method of a multistage embedded prefabricated part of a steel bar grouting sleeve joint comprises the following steps:
the method comprises the following steps: preparing a bench formwork, and arranging reinforcing steel bars in the bench formwork;
step two: connecting grouting sleeves at the bottom ends of the reinforcing steel bars, arranging magnetic guide cylinders at the bottoms of partial grouting sleeves to ensure that the positions of the grouting sleeves are not at the same height, and staggering the pre-buried grouting sleeves; the magnetic guide cylinder comprises a guide cylinder body, the guide cylinder body is divided into a guide cylinder lower part and a guide cylinder upper part connecting section, and the outer diameter of the guide cylinder upper part connecting section is smaller than that of the guide cylinder lower part; the magnetic guide cylinder also comprises a limiting ring piece, a magnet ring and an isolating film sleeve, wherein the magnet ring is sleeved on the periphery of the connecting section at the upper part of the guide cylinder and is positioned at the connecting part of the lower part of the guide cylinder and the connecting section at the upper part of the guide cylinder, and the limiting ring piece is arranged above the magnet ring and used for fixing the magnet ring; the isolation film sleeve is arranged on the periphery of the connecting section of the lower part of the guide cylinder and the upper part of the guide cylinder; the upper connecting section of the guide cylinder is connected with the grouting sleeve, and the upper connecting section of the guide cylinder and the grouting sleeve are separated by an isolating film sleeve;
step three: after the pre-buried position of the grouting sleeve is set, concrete is poured;
step four: after the concrete is solidified, the magnetic guide cylinder is drawn out, a cavity communicated with the outside is formed at the bottom of the grouting sleeve, the multi-stage embedded prefabricated part of the connection joint of the steel bar grouting sleeve is obtained, and the magnetic guide cylinder is recycled.
Preferably, the connecting section at the upper part of the guide cylinder is provided with a threaded connecting structure matched with the inner shape of the grouting sleeve.
Preferably, the outer diameters of the lower part of the guide cylinder, the limiting ring piece and the magnet ring are the same.
Preferably, the diameter of the lower part of the guide cylinder is consistent with the outer diameter of the semi-grouting sleeve, and a certain gap is reserved between the diameter of the connecting section of the upper part of the guide cylinder and the inner diameter of the grouting sleeve and used for arranging an isolation film sleeve.
Preferably, the gap between the connecting section at the upper part of the guide cylinder and the shear key in the sleeve does not exceed 1mm, and the length of the lower part of the guide cylinder, the length and the diameter of the connecting section at the upper part of the guide cylinder and the arrangement of the guide cylinder can be determined according to design requirements.
Preferably, shear keys within the sleeve are of common general knowledge.
Preferably, the bottom of the connecting section at the upper part of the guide cylinder is provided with a reserved screw hole for disassembly. When the guide cylinder is detached, the guide cylinder is connected with the reserved screw hole for detachment through the detaching bolt, and detachment of the guide cylinder is facilitated.
The guide cylinder and the sleeve connecting end have magnetism so as to form detachable stable connection with the sleeve, and a closed chamber is formed in an auxiliary mode when grouting connection operation is conducted.
The guide cylinder is externally wrapped with an isolation film sleeve, so that the guide cylinder can be drawn out for cyclic utilization after the grouting material is initially set, and the material requirement of the isolation film sleeve is consistent with the manufacturing requirement.
The utility model provides a multistage pre-buried connection structure of reinforcing bar grout muffjoint, reinforcing bar and grout sleeve in prefabricated component concrete, prefabricated component, reinforcing bar bottom and grout muffjoint, characterized by still includes the magnetism guide, the magnetism guide is connected the not co-altitude position that sets up grout sleeve in prefabricated component concrete below the grout sleeve.
Preferably, the height and arrangement of the magnetic guide cylinder along the grouting sleeve can be determined according to design requirements.
The key points of the invention are as follows:
according to the method, the semi-grouting sleeve can be placed on the section with the design requirement by installing the magnetic guide cylinders with different lengths, so that the purpose that the assembled precast concrete member semi-grouting sleeve connection steel bar joint can meet the design requirement on the area percentage of the tensioned steel bar lap joint of the steel bar connection in the same connection section is achieved.
The method designs a set of detachable guide cylinder, the guide cylinder is adsorbed on a grouting sleeve through a fixed magnetic ring, and the contact outer surface of the sleeve and concrete is wrapped by polypropylene (ethylene) fiber cloth or other similar materials so as to facilitate the detachment of the guide cylinder.
The invention has the advantages that:
1. need not to carry out any processing to half grout sleeve, place half grout sleeve reinforcing bar on the cross-section that the design needs through the different length magnetism guide cylinders of detachable. The semi-grouting sleeve can be placed on the section of the design requirement by using the magnetic guide cylinders with different lengths, and the assembled precast concrete member semi-grouting sleeve connection steel bar joint can be installed on the section of the design requirement in multiple stages.
2. By staggering the positions of the steel bar connecting joints, the anti-seismic performance and the anti-progressive collapse performance of the assembled structure can be effectively improved, and the reliability of the structure is improved.
3. The problem of difficult grouting of sleeves with different heights can be solved by drawing out the inner cavity formed by the magnetic guide cylinder.
4. The used magnetic guide cylinder can be recycled, the cost is lower, the manufacturing and processing procedures are simple, the price is low, the guide cylinder is easy to install and disassemble, and the guide cylinder can be repeatedly used.
Drawings
FIG. 1 is a schematic view of a magnetic guide cylinder;
FIG. 2 is a schematic view of the connection of a magnetic guide sleeve and a semi-grouting sleeve;
FIG. 3 is a schematic view of a prior art sleeve arranged in a row;
FIG. 4 is a schematic view of the sleeves arranged in two rows;
FIG. 5 is a schematic view of the sleeve arranged in three rows;
FIG. 6 is a schematic view of a sleeve rebar junction joint;
wherein, 1-magnetic guide cylinder inferior part, 2-magnetic guide cylinder upper portion connecting segment, 3-spacing ring piece, 4-magnet ring, 5-dismantlement are with reserving the screw hole, 6-dismantlement are with the bolt, 7-isolation film cover, 8-grout sleeve, 9-prefabricated component concrete, 10-reinforcing bar.
Detailed Description
The detailed structure of the present invention will be further described with reference to the accompanying drawings and the detailed description.
A preparation method of a multistage embedded prefabricated part of a steel bar grouting sleeve joint comprises the following steps:
(1) preparing a bench formwork, and arranging a steel bar 10 in the bench formwork;
(2) connecting a grouting sleeve 8 at the bottom end of the steel bar, arranging a magnetic guide cylinder at the bottom of part of the grouting sleeve 8 to ensure that the positions of the grouting sleeves 8 are not at the same height, and staggering the pre-buried grouting sleeves 8; the magnetic guide cylinder comprises a guide cylinder body, the guide cylinder body is divided into a guide cylinder lower part 1 and a guide cylinder upper part connecting section 2, and the outer diameter of the guide cylinder upper part connecting section 2 is smaller than that of the guide cylinder lower part 1; the magnetic guide cylinder also comprises a limiting ring piece 3, a magnet ring 4 and an isolating film sleeve 7, wherein the magnet ring 4 is sleeved on the periphery of the upper connecting section 2 of the guide cylinder and is positioned at the joint of the lower part 1 of the guide cylinder and the upper connecting section 2 of the guide cylinder, and the limiting ring piece 3 is arranged above the magnet ring 4 and used for fixing the magnet ring 4; the isolating film sleeve 7 is arranged on the periphery of the lower part 1 of the guide cylinder and the periphery of the upper connecting section 2 of the guide cylinder; the upper connecting section 2 of the guide cylinder is connected with the grouting sleeve, and the upper connecting section and the grouting sleeve are separated by an isolating film sleeve 7;
(3) after the pre-buried position of the grouting sleeve 8 is set, concrete is poured;
(4) after the concrete is solidified, the magnetic guide cylinder is drawn out, a cavity communicated with the outside is formed at the bottom of the grouting sleeve 8, a multi-stage embedded prefabricated part of the connection joint of the steel bar grouting sleeve is obtained, and the magnetic guide cylinder is recycled.
Fig. 1 and 2 show a schematic structural diagram of a magnetic conductor, in which the diameter of the lower part of the magnetic conductor is consistent with the outer diameter of a half grouting sleeve, the diameter of the upper part of the magnetic conductor is substantially consistent with the inner diameter of the grouting sleeve with a certain gap, the material can be steel or other materials with better rigidity, the surface of the lower part of the magnetic conductor is smooth, so that a pore channel can be formed in a component and the magnetic conductor can be pulled out of the component, the upper part of the magnetic conductor is lathed with threads, the inner diameter of a magnet ring is slightly larger than the outer diameter of an upper rod of a guide cylinder and not larger than the outer diameter of the lower rod, the magnet ring can be sleeved on the upper rod and clamped at the section step-changing position of the guide cylinder, and then the magnet ring is screwed up by a matching nut to fix the magnet on the guide cylinder. The outer surface of the isolation film sleeve is required to be demoulded, and the material can be polypropylene fiber cloth or other similar materials.
Fig. 3 shows the construction process, which is usually done at the present stage, and the sleeves are arranged in the same section, which is equivalent to the steel bars are all connected in the same connecting section.
Fig. 4 and 5 show that the arrangement structure of the invention is adopted, and the multistage pre-buried connection structure of the steel bar grouting sleeve connection joint comprises precast concrete 9, steel bars 10 in the precast concrete, a grouting sleeve 8 and magnetic guide cylinders, wherein the bottom ends of the steel bars 10 are connected with the grouting sleeve 8, and the magnetic guide cylinders are connected below the grouting sleeve to arrange the grouting sleeve 8 at different height positions in the precast concrete 9. The sleeves are arranged in two rows or three rows, and the distance between the rows is arranged according to the design requirement. The purpose of dislocation of the joint position of the steel bar is achieved by staggering the embedding position of the sleeve.
Fig. 6 is a structural diagram of the sleeve at three different arrangement depths, in order to form a cavity required for grouting when the component is poured, the sleeve and the sleeve are pre-embedded to form a removable guide tube, and a required pore channel is formed in the pouring process of the component. The top end of the guide cylinder is a straight rod with the diameter slightly smaller than the inner diameter of the sleeve, the straight rod directly extends into the sleeve by a certain length, a magnet ring is arranged at the variable step position of the section of the guide cylinder, the guide cylinder and the sleeve are tightly connected through the magnet ring, and the guide cylinder is not likely to be separated when a component is poured. The surface of the whole guide cylinder (including the part extending into the sleeve) is covered with a layer of isolation film sleeve for isolating the guide cylinder from the member concrete, so that the guide cylinder can be conveniently drawn out after the member is poured. The length of the guide cylinder can be determined according to the embedding depth of the sleeve.
The invention provides a graded pre-buried arrangement structure of a semi-grouting sleeve connecting steel bar joint when a vertical stressed prefabricated part is manufactured, a grouting sleeve of a connecting steel bar is pre-buried in the prefabricated part in a staggered mode through detachable magnetic guide cylinders with different lengths, and a cavity formed after the magnetic guide cylinders are detached can be led in the steel bar of the lower prefabricated part and can be communicated with a grouting cavity between the prefabricated parts, so that the difficulty of in on-site assembly construction of grouting of a built-in sleeve is solved. The joint of the grouting sleeve steel bar can be placed on the section required by design, so that the method that the grouting sleeve is uniformly embedded at the edge of the member by the steel bar semi-grouting sleeve joint of the traditional vertical stressed prefabricated member is avoided, and the joints of the prefabricated member semi-grouting sleeve joint steel bar are not in the same connecting section.
The above description is for the purpose of illustrating the present invention and is not intended to limit the scope of the present invention, and any person skilled in the art can substitute or change the technical solution of the present invention and its conception within the technical scope of the present invention, and the technical solution and the concept of the present invention are also intended to be covered by the scope of the claims of the present invention.
Claims (7)
1. A preparation method of a multistage embedded prefabricated part of a steel bar grouting sleeve joint is characterized by comprising the following steps:
the method comprises the following steps: preparing a bench formwork, and arranging a steel bar (10) in the bench formwork;
step two: connecting grouting sleeves (8) at the bottom ends of the steel bars, arranging magnetic guide cylinders at the bottoms of partial grouting sleeves (8) to enable the positions of the grouting sleeves (8) not to be at the same height, and staggering the pre-buried grouting sleeves (8); the magnetic guide cylinder comprises a guide cylinder body, the guide cylinder body is divided into a guide cylinder lower part (1) and a guide cylinder upper part connecting section (2), and the outer diameter of the guide cylinder upper part connecting section (2) is smaller than that of the guide cylinder lower part (1); the magnetic guide cylinder also comprises a limiting ring piece (3), a magnet ring (4) and an isolating film sleeve (7), wherein the magnet ring (4) is sleeved on the periphery of the upper connecting section (2) of the guide cylinder and is positioned at the joint of the lower part (1) of the guide cylinder and the upper connecting section (2) of the guide cylinder, and the limiting ring piece (3) is arranged above the magnet ring (4) and used for fixing the magnet ring (4); the isolation film sleeve (7) is arranged on the periphery of the connecting section (2) at the lower part (1) and the upper part of the guide cylinder; the upper connecting section (2) of the guide cylinder is connected with the grouting sleeve, and the upper connecting section and the grouting sleeve are separated by an isolating film sleeve (7);
step three: after the pre-buried position of the grouting sleeve (8) is set, concrete is poured;
step four: after the concrete is solidified, the magnetic guide cylinder is drawn out, a cavity communicated with the outside is formed at the bottom of the grouting sleeve (8), a multi-stage embedded prefabricated part of the connection joint of the steel bar grouting sleeve is obtained, and the magnetic guide cylinder is recycled.
2. The preparation method of the multistage embedded prefabricated part of the connection joint of the steel bar grouting sleeve as claimed in claim 1, wherein the upper connection section (2) of the guide cylinder is provided with a threaded connection structure matched with the shape of the inside of the grouting sleeve.
3. The preparation method of the multistage embedded prefabricated part of the steel bar grouting sleeve joint according to the claim 1, wherein the outer diameters of the lower part (1) of the guide cylinder, the limiting ring piece (3) and the magnet ring (4) are the same.
4. The preparation method of the multistage embedded prefabricated part of the steel bar grouting sleeve connecting joint according to the claim 1, wherein the diameter of the lower part (1) of the guide cylinder is consistent with the outer diameter of the semi-grouting sleeve, and a certain gap is reserved between the diameter of the connecting section (2) of the upper part of the guide cylinder and the inner diameter of the grouting sleeve and used for arranging an isolation film sleeve (7).
5. The preparation method of the multistage embedded prefabricated part of the connection joint of the steel grouting sleeve as claimed in claim 4, wherein the gap between the upper connection section (2) of the guide cylinder and the shear key in the sleeve is not more than 1 mm.
6. The preparation method of the multistage embedded prefabricated part of the connection joint of the steel bar grouting sleeve as claimed in claim 4, wherein the material requirement of the isolation film sleeve (7) is consistent with the manufacturing requirement.
7. The method for preparing the multistage embedded prefabricated part of the steel bar grouting sleeve connecting joint according to the claims 1-6, characterized in that a reserved screw hole (5) for disassembly is formed in the bottom of the connecting section (2) at the upper part of the guide cylinder.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011362437.1A CN112411887B (en) | 2020-11-27 | 2020-11-27 | Preparation method of multistage embedded prefabricated part of steel bar grouting sleeve connecting joint |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011362437.1A CN112411887B (en) | 2020-11-27 | 2020-11-27 | Preparation method of multistage embedded prefabricated part of steel bar grouting sleeve connecting joint |
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| CN112411887A CN112411887A (en) | 2021-02-26 |
| CN112411887B true CN112411887B (en) | 2022-04-29 |
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| CN104652467A (en) * | 2014-12-28 | 2015-05-27 | 中国二冶集团有限公司 | Construction method for reserved hole of equipment foundation bolt |
| CN105735466A (en) * | 2016-03-30 | 2016-07-06 | 上海建工二建集团有限公司 | Prefabricated wall column one-segment type steel rib connection structure and method |
| CN109083285A (en) * | 2018-10-09 | 2018-12-25 | 中铁隆昌铁路器材有限公司 | Conduit installation embedded sleeve barrel and conduit localization method |
| CN209413001U (en) * | 2018-09-29 | 2019-09-20 | 宁波普利凯建筑科技有限公司 | A kind of rubber built-in fitting |
| CN209855055U (en) * | 2019-02-28 | 2019-12-27 | 中建八局第三建设有限公司 | Be used for prefabricated wallboard and prefabricated post grout antidetonation sleeve subassembly |
| CN210713237U (en) * | 2019-07-12 | 2020-06-09 | 湖南德立铁路桥工程材料有限公司 | Embedded sleeve combination |
| CN210827921U (en) * | 2019-08-05 | 2020-06-23 | 中建科技有限公司 | Vertical dislocation connection structure of prefabricated shear wall |
-
2020
- 2020-11-27 CN CN202011362437.1A patent/CN112411887B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10046738A1 (en) * | 2000-09-21 | 2002-04-25 | Deha Ankersysteme | Coupling to connect reinforcing rod ends of concrete components has coupling section with external thread upon which is screwed conical clamping sleeve with widening conical bore to accommodate longitudinally slotted clamping cage |
| CN104652467A (en) * | 2014-12-28 | 2015-05-27 | 中国二冶集团有限公司 | Construction method for reserved hole of equipment foundation bolt |
| CN105735466A (en) * | 2016-03-30 | 2016-07-06 | 上海建工二建集团有限公司 | Prefabricated wall column one-segment type steel rib connection structure and method |
| CN209413001U (en) * | 2018-09-29 | 2019-09-20 | 宁波普利凯建筑科技有限公司 | A kind of rubber built-in fitting |
| CN109083285A (en) * | 2018-10-09 | 2018-12-25 | 中铁隆昌铁路器材有限公司 | Conduit installation embedded sleeve barrel and conduit localization method |
| CN209855055U (en) * | 2019-02-28 | 2019-12-27 | 中建八局第三建设有限公司 | Be used for prefabricated wallboard and prefabricated post grout antidetonation sleeve subassembly |
| CN210713237U (en) * | 2019-07-12 | 2020-06-09 | 湖南德立铁路桥工程材料有限公司 | Embedded sleeve combination |
| CN210827921U (en) * | 2019-08-05 | 2020-06-23 | 中建科技有限公司 | Vertical dislocation connection structure of prefabricated shear wall |
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| CN112411887A (en) | 2021-02-26 |
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