CN112554572A - Method for connecting reinforcing steel bars of semi-grouting sleeve of assembled precast concrete member - Google Patents
Method for connecting reinforcing steel bars of semi-grouting sleeve of assembled precast concrete member Download PDFInfo
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- CN112554572A CN112554572A CN202011365104.4A CN202011365104A CN112554572A CN 112554572 A CN112554572 A CN 112554572A CN 202011365104 A CN202011365104 A CN 202011365104A CN 112554572 A CN112554572 A CN 112554572A
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- steel bar
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- reinforcing
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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
-
- 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
- E04G21/14—Conveying or assembling building elements
- E04G21/16—Tools or apparatus
- E04G21/18—Adjusting tools; Templates
- E04G21/1841—Means for positioning building parts or elements
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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 provides a method for connecting a reinforcing steel bar of an assembled precast concrete member semi-grouting sleeve, which comprises the following steps of: the method comprises the following steps: the method is suitable for the situation that the actual deflection of the steel bar is smaller than the radius of the circular column cap of the steel bar; step two: upsetting one end of the existing steel bar inserted into the sleeve by using a steel bar upsetting machine and a steel bar upsetting die to form an upset steel bar; step three: and (3) cutting the residual steel bar part of the upset steel bar through machining to form the machined steel bar with a circular column cap, or butting and installing a section of upset steel bar with a steel bar head at one end inserted into the sleeve. The method is simple to operate, not only saves the installation construction time and improves the installation efficiency, but also provides reliable guarantee for the next grouting construction quality.
Description
Technical Field
The invention relates to the field of building construction, in particular to a method for connecting reinforcing steel bars of a semi-grouting sleeve of an assembled precast concrete member.
Background
When the semi-grouting sleeve of the prefabricated vertical stressed prefabricated concrete component is in grouting construction, due to the manufacturing, transportation, hoisting construction and other reasons of the prefabricated component, the steel bars connected with the sleeve of the prefabricated component are easy to be collided and inclined, so that when the prefabricated component is installed, all the steel bars of the lower prefabricated component are difficult to be inserted into the sleeve of the upper prefabricated component at one time, and during on-site installation construction, the reliability of the prefabricated vertical stressed prefabricated concrete component is seriously reduced due to the fact that individual steel bars are difficult to be inserted into the sleeve and cut off by an oxygen cutting machine, and therefore the problem of centering between the steel bars of the lower prefabricated component and the semi-grouting sleeve of the upper prefabricated component is one of the difficult problems of connection construction of the existing prefabricated concrete structures.
The problem of centering the steel bars of the prefabricated concrete component semi-grouting sleeve and the prefabricated component on the lower layer under the vertical stress of the upper layer is one of the difficult problems of connection construction of the existing prefabricated concrete structure, and a good solution is not found in the industry. A simple steel bar deviation rectifying device (patent grant publication No. CN 204850480U) adopts a device similar to a wrench to rectify the deviation of the steel bar, the method is simple, but the control of the deviation rectifying amount of the steel bar is difficult to realize, the deviation rectification by the aid of the device is difficult to operate and construct by workers, and particularly, the deviation rectification of the steel bar is difficult to implement on a thick steel bar.
A steel bar deviation rectifying device (patent publication No. CN 210976643U) and a mechanical power-assisted steel bar deviation rectifying device (patent publication No. CN 211173148U) adopt a hollow sleeve to rectify the deviation of a steel bar, the two methods are simple, but the control of the deviation rectifying amount of the steel bar is difficult to realize, meanwhile, the steel bar is in an inclined state after the deviation rectification of the steel bar, because the inner diameter space of a grouting sleeve is limited, the inclined steel bar still cannot smoothly enter the sleeve after being inserted into the sleeve, if an inclined steel bar head touches a rib of a sleeve shear groove, the steel bar can be clamped in the sleeve and cannot be bounced, and the device can not rectify the coarse steel bar easily.
A correction device for embedded steel bars (patent publication No. CN 209011586U) and a universal positioning device for embedded steel bars (application publication No. CN 109162462A) adopt a set of gears to mutually engage to correct the correction of the steel bars, the device is complex, when the steel bars are dense, the correction of the steel bars is difficult, and in addition, the applied gear rotating force is difficult to implement.
Therefore, the method for ensuring that the steel bars of the lower prefabricated part can be smoothly inserted into the semi-grouting sleeve of the upper prefabricated part is of great significance.
Disclosure of Invention
The invention aims to provide a method for connecting reinforcing steel bars of a semi-grouting sleeve of an assembly type precast concrete member, aiming at the problem that when the existing assembly type precast concrete member is installed, all reinforcing steel bars of a lower layer precast concrete member are difficult to insert into the sleeve of an upper layer precast concrete member at one time.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a method for connecting steel bars of an assembled precast concrete member semi-grouting sleeve comprises the following steps:
the method comprises the following steps: measuring the actual deflection of the steel bar, and if the actual deflection of the steel bar is smaller than the radius of the circular column cap of the steel bar, performing the method according to the second step and the third step; if the actual deviation of the steel bars is larger than the radius of the circular column caps of the steel bars, the steel bars are intervened, so that the actual deviation of each steel bar is smaller than the radius of the circular column caps of the steel bars, and then the operation is carried out according to the method of the second step and the method of the third step;
step two: upsetting one end of the existing steel bar inserted into the sleeve by using a steel bar upsetting machine and a steel bar upsetting die to form an upset steel bar; the steel bar upsetting die comprises a clamp, wherein the clamp comprises a front end and a tail end, a through hole is formed in the clamp along the axis direction of a transverse line, a plurality of grooves which are inwards concave towards the longitudinal direction of the clamp are formed in the inner wall of the hole, an arc-shaped notch is formed in the tail end of the hole, and the arc-shaped notch is inwards concave towards the front end from the tail end of the clamp;
step three: and (3) cutting redundant steel bars of the upset steel bars through machining to form machined steel bars with circular column caps, and butting and installing the upset steel bars and steel bar heads at one end of the inserted sleeve.
The method for measuring the actual deflection of the steel bar has various methods, any method in the prior art can be used, the steps of the embodiment are that parameters such as the steel bar spacing and the like are obtained by reading a design drawing, the correction steel bar positioning device is placed on the lower-layer prefabricated part, and the actual deflection of the steel bar is measured. The correction reinforcing steel bar positioning device comprises a correction reinforcing steel bar positioning plate and a movable support frame used for supporting the correction reinforcing steel bar positioning plate, the correction reinforcing steel bar positioning plate is a transparent plate, and graduated scales are arranged on any length direction and any width direction of the correction reinforcing steel bar positioning plate respectively.
Preferably, the correction steel bar positioning device further comprises a sliding rail, a transverse positioning axis and a longitudinal positioning axis, wherein movable connecting pieces are arranged at two ends of the transverse positioning axis and two ends of the longitudinal positioning axis, and the transverse positioning axis and the longitudinal positioning axis are connected with the sliding rail through the movable connecting pieces.
Preferably, one end of the movable support frame is fixed with the correction steel bar positioning plate, and the other end of the movable support frame is provided with a movable support bolt.
Preferably, in step one, the front end section is smaller than the end section.
Preferably, in the second step, the inner diameter of the hole is matched with the outer diameter of the steel bar, and the groove is matched with the external thread of the steel bar.
Preferably, the clamp in the second step is a detachable connecting structure.
Preferably, in the second step, a plurality of grooves are uniformly formed in 80% -90% of the length of the inner wall of the hole from the front end to the rear end.
Preferably, in the second step, the depth of the concave part of the arc-shaped notch from the tail end to the front end of the clamp is 1-2 times of the diameter of the reinforcing steel bar.
Preferably, the cross section of the arc-shaped notch in the second step is of an arc-shaped structure.
In consideration of the condition of overlarge deviation of the steel bar, the method determines the deviation amount of the steel bar by using a correction steel bar positioning device, corrects the deviation by adopting a corresponding deviation correction method and then connects the steel bar by using the method.
Compared with the prior art, the invention has the advantages that:
the invention starts from the source of processing the steel bars, and when the connecting steel bars are manufactured, one end of the existing steel bar inserting sleeve is processed into the circular column cap, so that the steel bars are not easy to be blocked by the shear keys in the sleeve, the steel bars of the lower-layer prefabricated component can be smoothly inserted into the semi-grouting sleeve of the upper-layer prefabricated component, and the condition that the stressed steel bars are manually intervened or cut off when the prefabricated component is installed is avoided.
The method can reduce the complex reinforcing steel bar deviation rectifying construction, has simple operation, saves the installation construction time, improves the installation efficiency and provides reliable guarantee for the next grouting construction quality.
Drawings
FIG. 1 is a sectional view of an upsetting die for forming reinforcing bars according to an embodiment;
fig. 2 is a sectional view showing the use of the upsetting mold for reinforcing bars according to the embodiment;
FIG. 3 is a schematic illustration of the post-upset rebar machining described in the examples;
FIG. 4 is a schematic view of the alignment of the reinforcing bars and the sleeves;
FIG. 5 is a perspective view of the aligning device;
FIG. 6 is a schematic view of the apparatus for aligning the reinforcing bars;
FIG. 7 is a top view of the corrective rebar positioning device;
wherein 1 is correction reinforcing bar locating plate, 2 is the activity support frame, 3 is horizontal location axis, 4 is vertical location axis, 5 is the slide rail, 6 is the activity stay bolt, 7 is the movable connecting piece, 8 is the scale, 9 is reinforcing bar design position, 10 is reinforcing bar actual position, 11 is the post-processing reinforcing bar, 12 is circular cap, 13 is the sleeve, 14 is the anchor clamps, 15 is the front end, 16 is the end, 17 is the arc notch, 18 is the recess, 19 is current reinforcing bar, 20 is upset back reinforcing bar, 21 is unnecessary reinforcing bar part, 22 is the hole, d is reinforcing bar actual deflection.
Detailed Description
The detailed structure of the present invention will be further described with reference to the accompanying drawings and the detailed description.
As shown in fig. 1 to 7, a method for connecting reinforcing bars to an assembled precast concrete member semi-grouting sleeve, comprising the steps of:
the method comprises the following steps: measuring the actual deflection d of the steel bar, and if the actual deflection d of the steel bar is smaller than the radius of the circular column cap 12 of the steel bar, performing the steps according to the methods of the second step and the third step; if the actual offset d of the steel bars is larger than the radius of the circular column cap 12 of the steel bars, the steel bars are intervened, so that the actual offset d of each steel bar is smaller than the radius of the circular column cap 12 of the steel bar, and then the steps are carried out according to the method of the second step and the method of the third step;
step two: upsetting one end of the existing steel bar 19 inserted into the sleeve by using a steel bar upsetting machine and a steel bar upsetting die to form an upset steel bar 20; this implementation reinforcing bar upsetting die includes anchor clamps 14, anchor clamps 14 includes front end 15 and end 16, anchor clamps 14 is equipped with the hole 22 that runs through along the horizontal line axis direction, and the hole 22 inner wall is equipped with a plurality of recesses 18 to 14 longitudinal direction indents of anchor clamps, the end of hole 22 is equipped with arc notch 17, arc notch 17 is from 16 to the front end direction indent of anchor clamps.
Step three: the upset reinforcing steel bar 20 is machined to remove the excess reinforcing steel bar part 21, so as to form the machined reinforcing steel bar 11 with the circular column cap 12, and then a section of the upset reinforcing steel bar is butt-jointed with one end of the reinforcing steel bar head inserted into the sleeve.
The method for measuring the actual deviation d of the steel bar has various methods, and in the first step of the embodiment, the parameters such as the steel bar spacing and the like are obtained by reading the design drawing, the correction steel bar positioning device is arranged on the lower-layer prefabricated part, and the actual deviation d of the steel bar is measured.
This embodiment a rectify reinforcing bar positioner, as shown in fig. 5, fig. 6, including rectifying reinforcing bar locating plate 1 and being used for supporting the movable support frame 2 of rectifying reinforcing bar locating plate 1, rectifying reinforcing bar locating plate 1 is the transparent plate, be equipped with scale 8 on arbitrary length direction and the arbitrary width direction of rectifying reinforcing bar locating plate 1 respectively.
One end of the movable support frame 2 is fixed with the correction steel bar positioning plate 1, and the other end of the movable support frame is provided with a movable support bolt 6, so that the height of the movable support frame can be adjusted, and the movable support frame is suitable for measuring steel bars with different heights.
The graduated scale 8 is arranged on two adjacent sides or the periphery of the correction reinforcing steel bar positioning plate 1, so that the positions of the transverse positioning axis and the longitudinal positioning axis can be more conveniently and accurately determined.
The number of the movable support frames 2 is 4, so that the correction steel bar positioning plate is kept horizontal.
The design of the transparent plate of the reinforcing steel bar correcting and positioning device can simply and clearly measure whether the reinforcing steel bars deviate and the deviation amount, and a proper method is selected for subsequent reinforcing steel bar deviation correction. The device can measure the deflection amount of a plurality of reinforcing steel bars at one time, is quick and accurate, and improves the efficiency and the accuracy of reinforcing steel bar deviation correction.
Other structures of the reinforcing steel bar correcting and positioning device are the same as those of the reinforcing steel bar correcting and positioning device, and as shown in fig. 7, the following technical characteristics can be additionally added: the correcting steel bar positioning device further comprises a sliding rail 5, a transverse positioning axis 3 and a longitudinal positioning axis 4, movable connecting pieces 7 are arranged at two ends of the transverse positioning axis 3 and two ends of the longitudinal positioning axis 4, and the transverse positioning axis 3 and the longitudinal positioning axis 4 are connected with the sliding rail 5 through the movable connecting pieces 7.
The transverse positioning axis 3 and the longitudinal positioning axis 4 are thin wires, steel wires or other materials.
The transverse positioning axes 3 are one or more, preferably more, so that the deflection of a plurality of steel bars of the lower-layer prefabricated part can be measured at one time.
The longitudinal positioning axis 4 is one or more, preferably more, so that the deflection of the multiple steel bars of the lower prefabricated part can be measured at one time.
The section of the front end 15 of the upsetting die is smaller than that of the tail end 16 of the upsetting die in this embodiment. The bore 22 has an internal diameter that matches the external diameter of the bar and the recess 18 matches the external thread of the bar. The clamp 14 is composed of two symmetrical parts. A plurality of grooves 18 are uniformly arranged on 80-90% of the length of the inner wall of the hole 22 from the front end to the rear end. The depth of the arc-shaped notch 17 inwards from the tail end 16 of the clamp to the front end is 1 time of the diameter of the steel bar. The section of the arc-shaped notch 17 is of an arc-shaped structure. The clamp 14 is steel or other material.
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 (10)
1. The method for connecting the steel bars of the assembled precast concrete member semi-grouting sleeve is characterized by comprising the following steps of:
the method comprises the following steps: measuring the actual deflection (d) of the steel bar, and if the actual deflection (d) of the steel bar is smaller than the radius of the circular column cap (12) of the steel bar, performing the steps according to the methods of the second step and the third step; if the actual deviation (d) of the steel bars is larger than the radius of the circular column caps (12) of the steel bars, the steel bars are intervened, so that the actual deviation (d) of each steel bar is smaller than the radius of the circular column caps (12) of the steel bars, and then the steps are carried out according to the method of the second step and the third step;
step two: upsetting one end of the existing steel bar (19) inserted into the sleeve by using a steel bar upsetting machine and a steel bar upsetting die to form an upset steel bar (20); the steel bar upsetting die comprises a clamp (14), wherein the clamp (14) comprises a front end (15) and a tail end (16), a through hole (22) is formed in the clamp (14) along the axis direction of a transverse line, a plurality of grooves (18) which are concave towards the longitudinal direction of the clamp (14) are formed in the inner wall of the hole (22), an arc-shaped notch (17) is formed in the tail end of the hole (22), and the arc-shaped notch (17) is concave towards the front end from the tail end (16) of the clamp;
step three: and (3) cutting off the redundant steel bar part (21) of the upset steel bar (20) through machining to form a machined steel bar (11) with a circular column cap (12), and then butting and installing a section of upset steel bar with a steel bar head at one end inserted into the sleeve.
2. The method for semi-grouting sleeve connection of steel bars for prefabricated concrete units according to claim 1, wherein the step (one) comprises obtaining steel bar spacing isoparametric parameters by reading design drawings, placing a correction steel bar positioning device on the lower prefabricated units, and measuring the actual deflection (d) of the steel bars; rectify reinforcing bar positioner including rectifying reinforcing bar locating plate (1) and be used for supporting activity support frame (2) of rectifying reinforcing bar locating plate (1), rectify reinforcing bar locating plate (1) and be the transparent plate, be equipped with scale (8) on arbitrary length direction and the arbitrary width direction of rectifying reinforcing bar locating plate (1) respectively.
3. The method for semi-grouting sleeve connection of the assembled precast concrete unit according to claim 2, wherein the alignment bar positioning device further comprises a slide rail (5), a transverse positioning axis (3) and a longitudinal positioning axis (4), movable connectors (7) are arranged at two ends of the transverse positioning axis (3) and the longitudinal positioning axis (4), and the transverse positioning axis (3) and the longitudinal positioning axis (4) are connected with the slide rail (5) through the movable connectors (7).
4. The method for semi-grouting sleeve connection of steel bars of fabricated precast concrete units according to claim 2, wherein one end of the movable support frame (2) is fixed with the alignment steel bar positioning plate (1), and the other end is provided with a movable support bolt (6).
5. The method for semi-grouting reinforcement of prefabricated concrete members according to claim 1, wherein the front end (15) of step (two) has a smaller cross-section than the rear end (16).
6. The method for semi-grouting sleeve-connecting reinforcing steel bars of fabricated precast concrete unit according to claim 1, wherein the inner diameter of the hole (22) is matched with the outer diameter of the reinforcing steel bars in the step (two), and the groove (18) is matched with the outer thread of the reinforcing steel bars.
7. The method for semi-grouting reinforcement of an assembled precast concrete unit according to claim 1, wherein the jig (14) of the step (ii) is a detachable coupling structure.
8. The method for semi-grouting reinforcement of an assembled precast concrete unit according to claim 1, wherein the inner wall of the hole (22) of the step (ii) is uniformly provided with a plurality of grooves (18) over 80-90% of the length from the front end to the rear end.
9. The method for semi-grouting of sleeves for coupling reinforcing bars of fabricated precast concrete units according to claim 1, wherein the depth of the arc-shaped notch (17) of step (two) is recessed from the end (16) to the front end of the jig by 1 to 2 times the diameter of the reinforcing bars.
10. The method for semi-grouting reinforcement of an assembled precast concrete unit according to claim 1, wherein the cross-section of the arc-shaped notch (17) of step (ii) is an arc-shaped structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011365104.4A CN112554572A (en) | 2020-11-27 | 2020-11-27 | Method for connecting reinforcing steel bars of semi-grouting sleeve of assembled precast concrete member |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011365104.4A CN112554572A (en) | 2020-11-27 | 2020-11-27 | Method for connecting reinforcing steel bars of semi-grouting sleeve of assembled precast concrete member |
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| Publication Number | Publication Date |
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| CN112554572A true CN112554572A (en) | 2021-03-26 |
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| CN202011365104.4A Pending CN112554572A (en) | 2020-11-27 | 2020-11-27 | Method for connecting reinforcing steel bars of semi-grouting sleeve of assembled precast concrete member |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050262914A1 (en) * | 2004-05-27 | 2005-12-01 | Dextra Asia Co., Ltd. | Forging machine for the upsetting of deformed reinforcement bars |
| CN201415243Y (en) * | 2009-04-29 | 2010-03-03 | 建研科技股份有限公司 | Cylindrical steel bar upsetting die |
| CN102605901A (en) * | 2012-04-05 | 2012-07-25 | 江苏金砼预制装配建筑发展有限公司 | Reinforcing steel bar assembly type structural reinforcing steel bar for building, connecting head part molding method and connecting head part molding mold |
| CN105057509A (en) * | 2015-08-31 | 2015-11-18 | 马鞍山市智峰机械有限公司 | Rebar head portion upsetting machine and use method thereof |
| CN204940875U (en) * | 2015-09-10 | 2016-01-06 | 河北建设集团有限公司 | A kind of adjustable bar reinforcement positioning device |
| CN205063192U (en) * | 2015-10-27 | 2016-03-02 | 周桂香 | Heading formula sleeve pipe mechanical connection of high tensile reinforcement |
| CN106077366A (en) * | 2016-08-26 | 2016-11-09 | 中冶建工集团有限公司 | A kind of upsetter steel bar clamping structure |
| CN110185199A (en) * | 2019-05-13 | 2019-08-30 | 江苏南通三建集团股份有限公司 | A kind of half grouting connection sleeve of the automatic deviation correction for prefabricated post wall |
-
2020
- 2020-11-27 CN CN202011365104.4A patent/CN112554572A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050262914A1 (en) * | 2004-05-27 | 2005-12-01 | Dextra Asia Co., Ltd. | Forging machine for the upsetting of deformed reinforcement bars |
| CN201415243Y (en) * | 2009-04-29 | 2010-03-03 | 建研科技股份有限公司 | Cylindrical steel bar upsetting die |
| CN102605901A (en) * | 2012-04-05 | 2012-07-25 | 江苏金砼预制装配建筑发展有限公司 | Reinforcing steel bar assembly type structural reinforcing steel bar for building, connecting head part molding method and connecting head part molding mold |
| CN105057509A (en) * | 2015-08-31 | 2015-11-18 | 马鞍山市智峰机械有限公司 | Rebar head portion upsetting machine and use method thereof |
| CN204940875U (en) * | 2015-09-10 | 2016-01-06 | 河北建设集团有限公司 | A kind of adjustable bar reinforcement positioning device |
| CN205063192U (en) * | 2015-10-27 | 2016-03-02 | 周桂香 | Heading formula sleeve pipe mechanical connection of high tensile reinforcement |
| CN106077366A (en) * | 2016-08-26 | 2016-11-09 | 中冶建工集团有限公司 | A kind of upsetter steel bar clamping structure |
| CN110185199A (en) * | 2019-05-13 | 2019-08-30 | 江苏南通三建集团股份有限公司 | A kind of half grouting connection sleeve of the automatic deviation correction for prefabricated post wall |
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Application publication date: 20210326 |
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