CN111927105B - Steel bar connecting method - Google Patents
Steel bar connecting method Download PDFInfo
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- CN111927105B CN111927105B CN202010731857.6A CN202010731857A CN111927105B CN 111927105 B CN111927105 B CN 111927105B CN 202010731857 A CN202010731857 A CN 202010731857A CN 111927105 B CN111927105 B CN 111927105B
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- sleeve
- connecting pin
- epoxy resin
- connecting rod
- pin
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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
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/12—Mounting of reinforcing inserts; Prestressing
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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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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Reinforcement Elements For Buildings (AREA)
Abstract
The invention relates to a steel bar connecting method, which comprises the following steps: forming a first pier head part at a first connecting end of a steel bar and penetrating into a first sleeve with internal threads; pouring part of epoxy resin into the first sleeve, and screwing a connecting rod which is in a cylindrical shape and provided with a screw at the upper part, a grout returning pore passage at the central part and a pin hole at the middle part into the first sleeve; inserting a connecting pin having a spring into the pin hole; inserting the second connecting end of the steel bar into the second sleeve; part of epoxy resin is poured into the second sleeve, and the edge of the second sleeve is coated with the epoxy resin; inserting the connecting rod into the second sleeve; epoxy resin in the second sleeve is arranged in a slurry return pore passage at the center of the connecting rod, enters the spring gap of the connecting pin through the slurry return pore passage under the action of pressure to be filled, and flows out of the air outlet hole; and forming connection after all the epoxy resin is hardened and solidified.
Description
Technical Field
The invention relates to the field of constructional engineering, in particular to a steel bar connecting method.
Background
The mechanical connection of the steel bars is a connection method for transmitting the force in one steel bar to the other steel bar through the mechanical engagement action of the steel bars and the connecting piece or other intervening materials or the pressure bearing action of the end faces of the steel bars.
The steel bar connection in the building engineering is two types of welding and mechanical connection. The welding is performed by various methods such as flash butt welding, arc welding, electroslag pressure welding, resistance spot welding, steel bar gas pressure welding and the like. The mechanical connection joint of the steel bars comprises sleeve extrusion connection, taper thread connection, straight thread connection and sleeve grouting connection. The sleeve mechanical connection method recommended by the general technical regulation for steel bar mechanical connection JGJ107 utilizes the characteristic that the strength of a metal material is enhanced by cold work hardening after the plastic deformation of the metal material, two steel bars are connected through the sleeve, then the sleeve is extruded by external force to generate plastic deformation and cold work hardening, and the interior of the metal still maintains the performance of the original metal, so that the steel bar joint and a base metal achieve equal strength. The steel bar sleeve grouting connection recommended by the technical specification of steel bar sleeve grouting connection application JGJ355 is that single ribbed steel bars are inserted into a metal sleeve, grouting mixture is injected, and the mixture is hardened to form a whole body and realize force transmission steel bar butt joint connection.
The mechanical connection of the sleeve requires external force to act on the sleeve to generate plastic deformation, and the sleeve is widely used at present. But the prefabricated part connection of the prefabricated building can not use external force, and is obviously not suitable.
The steel bar sleeve grouting connection technology is a steel bar connection technology aiming at prefabricated components, wherein ribbed steel bars are inserted into a grouting sleeve with an inner cavity of a concave-convex surface, and a special high-strength cement-based grouting material is poured into a gap between the sleeve and the steel bars, and the steel bars are anchored in the sleeve after the grouting material is solidified. The technology anchors the steel bars in the sleeve, so that the length of the sleeve is large.
Disclosure of Invention
The invention aims to connect the reinforcing steel bars without applying external force by a mechanical reinforcing steel bar connection method, and the mechanical reinforcing steel bar connection method is realized by the following technical scheme:
a method for connecting a first connecting end and a second connecting end of a steel bar is characterized by comprising the following steps:
1) forming a first pier head part at the first connecting end of the steel bar and penetrating the first pier head part into a first sleeve with internal threads;
2) pouring part of epoxy resin into the first sleeve, and screwing a connecting rod which is in a cylindrical shape and provided with a screw at the upper part, a grout returning pore passage at the central part and a pin hole at the middle part into the first sleeve;
3) coating epoxy resin on the outer end surfaces of the first connecting pin and the second connecting pin with springs, and then inserting the first connecting pin and the second connecting pin into the pin holes;
4) after forming a second pier head part by a second connecting end pier head of the reinforcing steel bar, inserting the second pier head part into a second sleeve internally provided with an upper annular key groove and a lower annular key groove;
5) Pouring part of epoxy resin into the second sleeve, and smearing the epoxy resin on the edge of the second sleeve;
6) inserting the connecting rod into the second sleeve;
7) applying axial force to one end of the first sleeve, wherein the first connecting pin and the second connecting pin which are connected through the spring retract under the action of the axial force, the first connecting pin is compressed into the connecting rod, when the connecting rod meets an upper annular key groove in the second sleeve, the diameter of the upper annular key groove is enlarged, the first connecting pin is clamped into the upper annular key groove under the action of the spring, the axial force is continuously applied, the first connecting pin continuously slides downwards, and after the connecting rod meets a lower annular key groove, the first connecting pin is clamped into the lower annular key groove under the action of the spring, and meanwhile, the second connecting pin is clamped into the upper annular key groove;
8) epoxy resin in the second sleeve is arranged in a slurry return pore passage at the central part of the connecting rod, enters the spring gaps of the first connecting pin and the second connecting pin through the slurry return pore passage under the action of pressure to be filled, and flows out of the air outlet (52);
9) and forming connection after all the epoxy resin is hardened and solidified.
The invention has the beneficial effects that:
by utilizing the invention, under the action of no radial external force, a reinforcing steel bar pier head is inserted into the first sleeve, then the connecting rod is screwed in, the connecting pin which is coated with the epoxy resin and connected by the spring is inserted to form one end of the reinforcing steel bar connection, then the reinforcing steel bar pier head is inserted into the second sleeve which is internally provided with the annular key groove, the epoxy resin is poured to form the other end of the reinforcing steel bar connection, after the centers of the two ends are aligned, the connecting rod is inserted into the second sleeve, the connecting pin connected by the spring enters the annular key groove of the second sleeve to form mechanical connection due to the action of axial force, meanwhile, the epoxy resin enters the spring through the grouting port and is discharged through the air outlet hole, and thus the reinforcing steel bar connection is formed. This connection has both played the advantage of muffjoint because the connecting pin forms mechanical connection's effect, the adverse factor of the external extrusion effect of avoiding again, again because epoxy's filling also is similar to the anchor effect of muffjoint grout connection, has utilized the advantage of muffjoint and muffjoint grout connection two kinds of connections, the telescopic connection length of grout that great reduces. The connecting device plays a key role in the connection of prefabricated parts, and is particularly suitable for the connection of prefabricated shear walls, prefabricated columns and prefabricated piles.
Drawings
Fig. 1 is a schematic structural view of a reinforcing bar coupler according to the present invention.
Fig. 2 is a schematic view of the first sleeve structure.
Fig. 3 is a schematic view of a connecting rod structure.
Fig. 4 is a schematic view showing a state in which the connecting pin is contracted against the elastic force.
Fig. 5 is a schematic view of the upper connecting pin structure.
Fig. 6 is a schematic view of the lower connecting pin structure.
Fig. 7 is a schematic view of a first sleeve connection structure.
Fig. 8 is a schematic view of the second sleeve structure.
Fig. 9 is a schematic view of the first sleeve insertion connection structure.
Detailed Description
The invention is further illustrated by the following figures and examples in conjunction with the description:
the steel bar connecting mechanism related to the embodiment of the invention is shown in fig. 1, is connected with a first connecting end 2 and a second connecting end 10, and comprises a first sleeve 1, a second sleeve 9 and a connecting rod 5, wherein the first connecting end 2 is fixedly connected with the first sleeve 1, and one end of the connecting rod 5 is fixedly connected in the first sleeve; second connecting end fixed connection is in the second sleeve, second sleeve inner wall longitudinal distribution has last annular keyway 11, annular keyway 12 down, the middle part of connecting rod is provided with two pinhole 54 that transversely link up, and it is perpendicular to different faces between two pinhole each other, elasticity is provided with and goes up annular keyway 11 in the pinhole, last connecting pin 6 and lower connecting pin 7 that annular keyway 12 corresponds down, particularly, the pinhole embeds there is the spring that is located the pinhole middle part, connecting pin 6 comprises two connecting blocks, two connecting blocks are connected respectively at the both ends of spring.
When the external extrusion force is removed, the connecting pin moves towards the external direction of the pin hole; the connecting rod 5 is inserted in the second sleeve 9 and the pin hole corresponds to an annular key groove in which the connecting pin is partially inserted under the influence of elastic force.
Specifically, the first connecting end 2 is provided with a first pier head portion located in the first sleeve 1, the inner diameter of one end, opposite to the first connecting end, of the first sleeve is folded to form a first limiting portion corresponding to the pier head portion, and epoxy resin 4 fixedly adhering to the pier head portion is filled in the limiting portion.
The second connecting end 10 is provided with a second pier head part located in the second sleeve, the inner diameter of one end, opposite to the second connecting end, of the second sleeve is drawn in to form a second limiting part corresponding to the pier head part, and epoxy resin for fixedly bonding the pier head part is filled in the limiting part.
A grout returning hole channel 51 is longitudinally arranged in the connecting rod, one port of the grout returning hole channel is positioned on the end face of the connecting rod opposite to the second sleeve, and the grout returning hole channel longitudinally extends from the inside of the connecting rod to the upper part of the connecting rod and then transversely extends to form an air outlet hole 52 on the outer side wall of the connecting rod; when the connecting rod is inserted into the second sleeve, the epoxy resin in the second sleeve is extruded, and the epoxy resin is distributed in the pin hole and the matching gap between the connecting rod and the second sleeve through the slurry return hole. The upper portion of connecting rod is provided with the spacing separation blade 55 that offsets with the nozzle of first sleeve, the back thick liquid pore extends and is in inside longitudinal extension of connecting rod makes venthole 52 be located the side of spacing separation blade to the inboard horizontal extension then of spacing separation blade.
The one end of connecting rod 5 that is connected with first sleeve is provided with the external screw thread, and the inner wall of first sleeve is provided with the internal thread, and the connecting rod is in first sleeve through screw thread fixed connection to the corresponding tip extrusion of connecting rod is located the epoxy in first sleeve and makes the terminal surface of connecting rod adhere with first connection end through epoxy. In order to facilitate the insertion process of the connecting rod in the second sleeve, a round chamfer 13 is arranged at the edge of the annular key groove corresponding to the insertion direction of the connecting rod.
The examples are as follows:
(1) and the first connecting end pier head of the steel bar is penetrated into the first sleeve 1 internally provided with the internal thread 3 after forming the first pier head part.
(2) And pouring part of epoxy resin 4 into the first sleeve, and screwing the connecting rod 5 which is in a cylindrical shape and provided with a screw 53 at the upper part, a grout returning pore passage 51 at the central part and a pin hole 54 at the middle part into the first sleeve 1.
(3) Coating epoxy resin on the surfaces of the connecting pin 6 and the connecting pin 7 connected with the spring 8 and then inserting the connecting pin and the connecting pin into the pin hole 54; forming one end of the connection.
(4) And the second sleeve 9 which is internally provided with an upper annular key groove 11 and a lower annular key groove 12 is penetrated after the second pier head part is formed by connecting the second reinforcing steel bar with the pier head part.
(5) Pouring part of epoxy resin 4 into the second sleeve 9, and coating the epoxy resin on the end part 15 of the second sleeve, namely the bead; forming the other end of the connection.
(6) The end of the first sleeve 1 screwed into the connecting rod 5 is aligned with the poured part of the resin 4 and with the end 15 of the second sleeve coated with epoxy resin, and the connecting rod 5 is inserted into the second sleeve 9.
(7) The axial force is applyed in 1 one end of first sleeve, connecting pin 7 that spring 8 connects, connecting pin 6 is under the effect of axial force, because the existence of round chamfer 13, spring 8 contracts, compress connecting pin 7 to connecting rod 5 inside, when connecting rod 5 runs into annular keyway 11 on the second sleeve 9, because annular keyway 11 diameter enlarges, spring 8 effect makes connecting pin 7 card go into in annular keyway 11, continue to exert axial force, connecting pin 7 continues the lapse, run into annular keyway 12 back down, spring 8 effect makes connecting pin 7 card go into down in the annular keyway 12, connecting pin 6 card goes into in annular keyway 11 simultaneously.
(8) The epoxy resin in the second sleeve 9 is provided with a slurry return hole 51 in the central part of the connecting rod 5, enters the connecting pin 6 and the spring 8 of the connecting pin 7 through the slurry return hole 51 under the action of pressure to be filled, and flows out of the air outlet 52.
(9) And forming connection after the epoxy resin is hardened and solidified.
Claims (1)
1. A method for connecting a first connecting end and a second connecting end of a steel bar is characterized by comprising the following steps:
1) Forming a first pier head part at the first connecting end of the steel bar and penetrating the first pier head part into a first sleeve with internal threads;
2) pouring part of epoxy resin into the first sleeve, and screwing a connecting rod which is in a cylindrical shape and provided with a screw at the upper part, a grout returning pore passage at the central part and a pin hole at the middle part into the first sleeve;
3) coating epoxy resin on the outer end surfaces of the first connecting pin and the second connecting pin with springs, and then inserting the first connecting pin and the second connecting pin into the pin holes;
4) after forming a second pier head part by a second connecting end pier head of the reinforcing steel bar, inserting the second pier head part into a second sleeve internally provided with an upper annular key groove and a lower annular key groove;
5) pouring part of epoxy resin into the second sleeve, and smearing the epoxy resin on the edge of the second sleeve;
6) inserting the connecting rod into the second sleeve;
7) applying axial force to one end of the first sleeve, wherein the first connecting pin and the second connecting pin which are connected through the spring retract under the action of the axial force, the first connecting pin is compressed into the connecting rod, when the connecting rod meets an upper annular key groove in the second sleeve, the diameter of the upper annular key groove is enlarged, the first connecting pin is clamped into the upper annular key groove under the action of the spring, the axial force is continuously applied, the first connecting pin continuously slides downwards, and after the connecting rod meets a lower annular key groove, the first connecting pin is clamped into the lower annular key groove under the action of the spring, and meanwhile, the second connecting pin is clamped into the upper annular key groove;
8) Epoxy resin in the second sleeve enters the spring gaps of the first connecting pin and the second connecting pin through the slurry return pore passage to be filled due to the pressure action in the slurry return pore passage arranged at the central part of the connecting rod, and flows out of the air outlet hole;
9) and forming connection after all the epoxy resin is hardened and solidified.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010731857.6A CN111927105B (en) | 2020-07-27 | 2020-07-27 | Steel bar connecting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010731857.6A CN111927105B (en) | 2020-07-27 | 2020-07-27 | Steel bar connecting method |
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| Publication Number | Publication Date |
|---|---|
| CN111927105A CN111927105A (en) | 2020-11-13 |
| CN111927105B true CN111927105B (en) | 2022-05-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010731857.6A Active CN111927105B (en) | 2020-07-27 | 2020-07-27 | Steel bar connecting method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103189585A (en) * | 2010-11-04 | 2013-07-03 | 株式会社阿尔西 | Reinforcement bar coupler |
| CN104295006A (en) * | 2014-10-17 | 2015-01-21 | 四川省建筑科学研究院 | Spring extrusion type steel bar connecting component and construction method thereof |
| CN204919534U (en) * | 2015-08-25 | 2015-12-30 | 袁江 | Inserted connection mechanical splice |
| CN207228481U (en) * | 2017-09-30 | 2018-04-13 | 张朝臣 | A kind of new reinforcing steel bar straight screw sleeve attachment device |
| CN111306167A (en) * | 2020-03-23 | 2020-06-19 | 陈正祖 | Double-end automatic locking type connecting assembly |
-
2020
- 2020-07-27 CN CN202010731857.6A patent/CN111927105B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103189585A (en) * | 2010-11-04 | 2013-07-03 | 株式会社阿尔西 | Reinforcement bar coupler |
| CN104295006A (en) * | 2014-10-17 | 2015-01-21 | 四川省建筑科学研究院 | Spring extrusion type steel bar connecting component and construction method thereof |
| CN204919534U (en) * | 2015-08-25 | 2015-12-30 | 袁江 | Inserted connection mechanical splice |
| CN207228481U (en) * | 2017-09-30 | 2018-04-13 | 张朝臣 | A kind of new reinforcing steel bar straight screw sleeve attachment device |
| CN111306167A (en) * | 2020-03-23 | 2020-06-19 | 陈正祖 | Double-end automatic locking type connecting assembly |
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| Publication number | Publication date |
|---|---|
| CN111927105A (en) | 2020-11-13 |
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