CN111590229A - Combined connection method for concrete beam steel bars and section steel columns - Google Patents
Combined connection method for concrete beam steel bars and section steel columns Download PDFInfo
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- CN111590229A CN111590229A CN202010553840.6A CN202010553840A CN111590229A CN 111590229 A CN111590229 A CN 111590229A CN 202010553840 A CN202010553840 A CN 202010553840A CN 111590229 A CN111590229 A CN 111590229A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 147
- 239000010959 steel Substances 0.000 title claims abstract description 147
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000010276 construction Methods 0.000 claims abstract description 11
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract description 10
- 238000003466 welding Methods 0.000 claims description 91
- 238000005422 blasting Methods 0.000 claims description 5
- 230000007547 defect Effects 0.000 claims description 5
- 238000005096 rolling process Methods 0.000 claims description 5
- 230000008439 repair process Effects 0.000 claims description 4
- 230000007704 transition Effects 0.000 claims description 4
- 238000005303 weighing Methods 0.000 claims description 2
- 210000001503 joint Anatomy 0.000 claims 2
- 230000006872 improvement Effects 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000009467 reduction Effects 0.000 abstract description 3
- 230000003014 reinforcing effect Effects 0.000 description 12
- 230000002787 reinforcement Effects 0.000 description 5
- 238000005520 cutting process Methods 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- 241001285221 Breviceps Species 0.000 description 1
- 229910000746 Structural steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/58—Connections for building structures in general of bar-shaped building elements
- E04B1/5825—Connections for building structures in general of bar-shaped building elements with a closed cross-section
- E04B1/5831—Connections for building structures in general of bar-shaped building elements with a closed cross-section of substantially rectangular form
-
- 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
-
- 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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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Reinforcement Elements For Buildings (AREA)
Abstract
The invention discloses a method for connecting concrete beam reinforcing steel bars and section steel columns in a combined manner. On the premise of ensuring the integrity and reliability of the structure, the method has the advantages of simple manufacture, economy and applicability, convenient construction and operation, safe and reliable structure, improvement of working efficiency, reduction of labor expenditure, cost saving and the like.
Description
Technical Field
The invention relates to the technical field of section steel concrete combination, in particular to a method for connecting concrete beam steel bars and section steel columns in a combined mode.
Background
In traditional shaped steel concrete integrated configuration, because the rigidity of shaped steel post is just can not remove during the installation of concrete beam reinforcing bar, the beam reinforcing bar is the scale connection and can not stretch out and draw back, therefore concrete beam reinforcing bar becomes a special link with being connected of shaped steel post. The traditional concrete beam reinforcing steel bars are connected with the section steel columns, steel brackets are generally welded on the section steel columns, and the concrete beam reinforcing steel bars are welded on the brackets; or the section steel column is provided with a hole, and the steel bar is penetrated into the hole of the section steel column; or the beam steel bars and the section steel columns are connected in a lap welding or rib welding mode. However, the above connection method has the following disadvantages:
(1) many, the diameter of roof beam reinforcing bar row in the engineering, when the interval between the single reinforcing bar, welding quality is difficult to guarantee, and the back reinforcing bar interval undersize of welding influences concrete placement quality, and the concrete beam reinforcing bar row is many, and the problem that second, third row roof beam reinforcing bar and shaped steel post are connected can't be solved to the welding steel corbel mode.
(2) When the beam reinforcing bars are dense, the holes in the section steel columns can weaken the strength of the section steel column wall plates in a large area, even cut the section steel column wall plates up and down, seriously damage the structure of the section steel columns and endanger the structure safety.
(3) When the diameter of the steel bars of the structural beam is large, the number of rows of the steel bars is large, and the space between the single-row steel bars is small, the lap welding or the rib welding is adopted, so that the welding quality is difficult to guarantee, the welding position occupies the space of the concrete beam in an extruding manner, the thickness of the steel bar protective layer at the welding position is reduced, and the concrete pouring quality is influenced due to the undersized space between the welded steel bars.
In order to ensure the integrity and reliability of the structure, the strength of the connection of the steel bars and the thickness of a protective layer are ensured, and holes are not suitable to be formed in the section steel columns, so that the technical problem to be solved by the invention is how to design a novel method for connecting the concrete beam steel bars and the section steel columns.
Disclosure of Invention
The invention provides a method for connecting concrete beam steel bars and section steel columns in a combined manner aiming at the defects. The concrete beam steel bars and the section steel columns are connected in a mode of mechanical connection and groove welding of weldable sleeves, and on the premise of guaranteeing the integrity and reliability of the structure, the concrete beam steel bars and the section steel columns are connected, so that the advantages of simplicity in manufacture, economy, practicability, convenience in construction and operation, safe and reliable structure, improvement of working efficiency, reduction of labor expenditure, cost saving and the like are achieved.
The technical scheme of the method for connecting the concrete beam reinforcing steel bars and the section steel columns in a combined mode is that beam-column joints adopt a mechanical connection mode of weldable sleeves, and the reinforcing steel bars in the beams adopt a connection mode of groove welding. The welded sleeve is welded to a section steel column, the component is conveyed to a construction site and then the concrete beam steel bars which are cut into two parts are connected to the section steel column through a mechanical connection mode, after the component is connected with the section steel column, the two parts of the same beam steel bar are connected into one beam steel bar through a groove welding mode, beam steel bar connection is coaxial and concentric, and the requirement of steel bar stress is met.
The method for connecting the concrete beam steel bars and the section steel columns in a combined mode comprises the following steps:
(1) processing in a weldable straight thread sleeve processing factory;
(2) beam steel bar processing;
(3) the steel bars are connected with the sleeves on the section steel columns;
(4) and the steel bar groove in the beam is welded.
The step (1) is specifically as follows: after the welding of the section steel member is finished, welding construction work of the weldable sleeve is carried out before shot blasting;
a, connecting a short head of a steel bar matched with the weldable sleeve before welding the sleeve, and screwing the sleeve from a non-welded end to the sleeve to prevent the sleeve from deforming when the weldable sleeve is welded and welding slag caused in welding from entering the sleeve;
b, spot welding one end surface of the weldable sleeve with a large chamfer to the section steel, and weighing 2 points to be welded during welding, wherein the gap between the sleeve and the section steel is controlled to be 2 mm;
c, welding for a circle along the chamfer of the weldable sleeve; the appearance of the welding line is uniform, full and smooth in transition, and the difference value of the height of the surface of the welding line is not more than 2mm within the arbitrary length range of 25mm of the welding line; the size of the welding leg is in accordance with the specification, and the deviation is 0-3 mm.
The step (2) is specifically as follows: and (4) processing the end of the steel bar to be connected into threads by using a steel bar rib stripping and rolling straight thread machine. The processing length of the reinforcing steel bar thread head is one time of the length of the weldable sleeve, and the tolerance is +1P, wherein P is 1 thread.
The step (4) is specifically as follows:
aligning two ends of the same steel bar in the beam and marking the position of a bevel, wherein the bevel surface is required to be smooth, and the edge of the bevel is not required to have cracks, truncated edges and unfilled edges;
secondly, a steel backing plate is additionally arranged under the groove before welding, three layers of side welding seams are welded between the steel bars and the steel backing plate, and if defects such as arc pits, air holes, undercut and the like exist, repair welding is immediately carried out;
and thirdly, immediately welding the steel bar connection groove after the welding between the steel bars and the steel plates is finished.
In the first step, the angle of the groove of each section of steel bar is 27.5-32.5 degrees, the angle of the groove is 55-65 degrees after the two ends are butted, and preferably, the angle of the groove of each section of steel bar is 30 degrees.
In the second step, the thickness of the base plate is 6mm, the length of the base plate is 60mm, and the width of the base plate is the diameter of the steel bar plus 10 mm.
In the third step, the width of the welding seam is 2-3mm larger than the edge of the V-shaped groove, the remaining height of the welding seam is not more than 3mm, and the welding seam is gently transited to the surface of the steel bar.
The invention has the beneficial effects that: the invention adopts groove welding, does not need to fix the structural steel bars by the aid of the side bars or the melting tank, and is more convenient and faster in construction compared with the melting tank side bar welding; the groove welding is completely finished by butt welding of the steel bars of the original structure, the concentricity of the connecting steel bars is ensured, the longitudinal ribs of the steel bars are completely butted, the angles of the transverse ribs of the steel bars are consistent, and the concrete bond strength of a single steel bar is greatly ensured; meanwhile, the problem that space of structural beams and column reinforcements is occupied by extrusion due to the fact that the reinforcement connection mode of the fusion groove rib welding is greatly reduced in groove welding, the distribution of the reinforcements of the lower beam in the groove welding mode is more uniform, concrete pouring is more convenient, and the problem that concrete coarse aggregates cannot normally fall due to insufficient reinforcement intervals in the concrete falling process to cause concrete segregation is avoided.
The beam column joint connection combination technology has the advantages of simple manufacture, economy, practicability, convenient construction and operation, safe and reliable structure, improvement on working efficiency, reduction in labor force expenditure, cost saving and the like on the premise of ensuring the integrity and reliability of the structure.
Drawings
FIG. 1 is a schematic view of groove welding of a reinforcing bar in a beam;
FIG. 2 is a photograph of a weldable sleeve welded to a section steel column;
fig. 3 shows a photograph of a beam-column joint connection object.
Detailed Description
For better understanding of the present invention, the technical solution of the present invention will be described in detail with specific examples, but the present invention is not limited thereto.
Example 1
1. Processing in weldable straight thread sleeve processing factory
The welding construction work of the weldable sleeve is carried out before the shot blasting after the welding of the section steel member in the steel structure processing factory is finished. Can satisfy the civil engineering steel bar connection needs after guaranteeing to weld the sleeve welding, should weld the sleeve work progress according to following requirement in the process:
1) and (4) inspecting the entering sleeves one by one, and performing field retreating treatment on the sleeves with unqualified quality, wherein the sleeves are forbidden to be used in projects.
2) In order to prevent the weldable sleeve from deforming when being welded and welding slag caused in the welding from entering the sleeve, the short heads of the steel bars matched with the weldable sleeve are connected with the weldable sleeve before the sleeve is welded (the sleeve is screwed in from the non-welded end).
3) One end face of the sleeve capable of being welded, which is provided with a large chamfer, is subjected to spot welding on the section steel, and 2 points are welded in a symmetrical mode during welding, and the gap between the sleeve and the section steel is controlled to be 2 mm.
4) Welding for one circle to the specified welding seam requirement along the weldable sleeve chamfer: firstly, the welding seam has no air holes, slag inclusion, cracks, arc pits, welding beading and the like, and repair welding is needed in time when defects are found; secondly, the appearance of the welding seam is uniform, full and smooth in transition, and the difference of the height of the surface of the welding seam is not more than 2mm within the arbitrary length range of 25mm of the welding seam; and thirdly, the size of the welding leg is in accordance with the specification, and the deviation is 0-3 mm.
5) After the welding of the sleeve welded on the same beam section is finished, the short head of the steel bar can be twisted out, and then the sleeve is plugged by paper, so that the sleeve is prevented from being polluted in shot blasting construction and other work.
6) And after the sleeves on the section steel members are completely welded, performing shot blasting construction on the section steel members.
7) Quality inspection: the welding connection strength can be ensured by ensuring the height of the welding seam between the welded straight thread sleeve and the section steel column, the height of the welding seam is determined by a manufacturer through tests, the grade of the welding seam is three-grade, the welding seam can be checked and accepted according to a checking and accepting method of the three-grade welding seam in GB/T50205 & lt Steel Structure construction quality checking and accepting Standard & gt, and the appearance quality standard and the allowable deviation of the size meet the relevant regulations of the three-grade welding seam in GB/T50205.
2. Beam reinforcement processing
1) Flattening the end face of the steel bar: the purpose of the flat head is to ensure that the end face of the steel bar is vertical to the axial direction of the base material, and simultaneously cut off the bent part of the head of the steel bar, and a grinding wheel cutting machine or other special cutting equipment is preferably adopted to strictly prevent gas cutting.
2) Rib stripping and thread rolling: and (4) processing the end of the steel bar to be connected into threads by using a steel bar rib stripping and rolling straight thread machine. The length of the steel bar thread head should be one time of the length of the weldable sleeve, and the tolerance is +1P (P is 1 thread).
3) Inspecting the quality of the silk head: and (5) carrying out quality inspection on the processed thread head according to the standard by an operator.
4) Taking a protective cap: the steel bar thread head is protected by a special steel bar thread head protective cap, and the thread is prevented from being collided or polluted by dirt.
5) Performing selective inspection on the quality of the silk heads: and sampling and inspecting the qualified self-inspected filament heads according to the specifications.
6) And calculating the bending length and the bending height of the end of the steel bar according to the diameter of the beam steel bar.
7) And (3) storing for later use: and classifying and stacking according to specification models and types.
3. Sleeve connection between steel bar and section steel column
The beam rib is screwed into the weldable sleeve on the section steel column and screwed, and the screwing torque meets the regulation of the industry standard rolling straight thread steel bar connection joint JGJ 163-2004.
4. Groove welding connection of steel bars in beam
1) The two ends of the same steel bar in the beam are aligned and then marked with the groove opening position, the groove opening angle of each section of steel bar is 30 degrees, the groove opening surface is required to be smooth, and the edge of the notch cannot have cracks, truncated edges and unfilled edges.
2) And a steel backing plate is arranged below the groove before welding, the thickness of the backing plate is 6mm, the length of the backing plate is 60mm, the width of the backing plate is the diameter of the steel bar plus 10mm, three layers of side welding seams are welded between the steel bar and the steel backing plate, and if defects such as craters, air holes, undercut and the like exist, repair welding is immediately carried out.
3) Weld between reinforcing bar and steel sheet and carry out welding immediately after accomplishing to the steel bar connection groove, the width of welding seam is greater than the edge 3mm of V-arrangement groove, and the welding seam surplus height is not more than 3mm to gently transition to the reinforcing bar surface.
Claims (8)
1. A method for connecting concrete beam reinforcing steel bars and section steel columns in a combined mode is characterized in that beam-column joints adopt a mechanical connection mode of weldable sleeves, and reinforcing steel bars in beams adopt a connection mode of groove welding.
2. The method for connecting the concrete beam reinforcing steel bars and the section steel columns in the combined mode according to claim 1, wherein the method comprises the following steps of:
(1) processing in a weldable straight thread sleeve processing factory;
(2) beam steel bar processing;
(3) the steel bars are connected with the sleeves on the section steel columns;
(4) and the steel bar groove in the beam is welded.
3. The method for connecting the concrete beam steel bars and the section steel columns in the combined mode is characterized in that the step (1) is specifically as follows: after the welding of the section steel member is finished, welding construction work of the weldable sleeve is carried out before shot blasting;
a, before welding the sleeve, connecting a short head of a steel bar matched with the weldable sleeve, and screwing the short head of the steel bar into the sleeve from a non-welded end;
b, spot welding one end surface of the weldable sleeve with a large chamfer to the section steel, and weighing 2 points to be welded during welding, wherein the gap between the sleeve and the section steel is controlled to be 2 mm;
c, welding for a circle along the chamfer of the weldable sleeve; the appearance of the welding line is uniform, full and smooth in transition, and the difference value of the height of the surface of the welding line is not more than 2mm within the arbitrary length range of 25mm of the welding line; the size of the welding leg is in accordance with the specification, and the deviation is 0-3 mm.
4. The method for connecting the concrete beam steel bars and the section steel columns in the combined mode is characterized in that the step (2) is specifically as follows: and (4) processing the end of the steel bar to be connected into threads by using a steel bar rib stripping and rolling straight thread machine. The processing length of the reinforcing steel bar thread head is one time of the length of the weldable sleeve, and the tolerance is +1P, wherein P is 1 thread.
5. The method for connecting the concrete beam steel bars and the section steel columns in the combined mode is characterized in that the step (4) is specifically as follows:
aligning two ends of the same steel bar in the beam and marking the position of a bevel, wherein the bevel surface is required to be smooth, and the edge of the bevel is not required to have cracks, truncated edges and unfilled edges;
secondly, a steel backing plate is additionally arranged under the groove before welding, three layers of side welding seams are welded between the steel bars and the steel backing plate, and if defects such as arc pits, air holes, undercut and the like exist, repair welding is immediately carried out;
and thirdly, immediately welding the steel bar connection groove after the welding between the steel bars and the steel plates is finished.
6. The method for connecting the concrete beam steel bars and the section steel columns in the combined mode according to claim 5, wherein in the step (r), the bevel angle of each section of steel bars is 27.5-32.5 degrees, and the bevel angle is 55-65 degrees after the two ends are in butt joint.
7. The method for connecting the concrete beam steel bars and the section steel columns in the combined mode according to claim 5, wherein in the step II, the thickness of the backing plate is 6mm, the length of the backing plate is 60mm, and the width of the backing plate is the diameter of the steel bars plus 10 mm.
8. The method for connecting the concrete beam steel bars and the section steel columns in the combined mode according to claim 5, wherein in the step three, the width of the welding line is 2-3mm larger than the edge of the V-shaped groove, the height of the welding line is not larger than 3mm, and the welding line is gently transited to the surface of the steel bars.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010553840.6A CN111590229A (en) | 2020-06-17 | 2020-06-17 | Combined connection method for concrete beam steel bars and section steel columns |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010553840.6A CN111590229A (en) | 2020-06-17 | 2020-06-17 | Combined connection method for concrete beam steel bars and section steel columns |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114809289A (en) * | 2022-04-15 | 2022-07-29 | 中建一局集团第三建筑有限公司 | Construction process of weldable sleeve |
| CN115306162A (en) * | 2022-09-01 | 2022-11-08 | 中铁十一局集团有限公司 | Reverse construction welding connection construction method for section steel column and large-size section concrete beam |
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2020
- 2020-06-17 CN CN202010553840.6A patent/CN111590229A/en active Pending
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114809289A (en) * | 2022-04-15 | 2022-07-29 | 中建一局集团第三建筑有限公司 | Construction process of weldable sleeve |
| CN114809289B (en) * | 2022-04-15 | 2023-04-18 | 中建一局集团第三建筑有限公司 | Construction process for weldable sleeve |
| CN115306162A (en) * | 2022-09-01 | 2022-11-08 | 中铁十一局集团有限公司 | Reverse construction welding connection construction method for section steel column and large-size section concrete beam |
| CN115306162B (en) * | 2022-09-01 | 2023-09-26 | 中铁十一局集团有限公司 | Reverse construction and welding connection construction method for steel column and large-size section concrete beam |
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Application publication date: 20200828 |
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