CN106285015A - Steel structural roof beam method for rapidly mounting based on location-plate - Google Patents
Steel structural roof beam method for rapidly mounting based on location-plate Download PDFInfo
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- CN106285015A CN106285015A CN201510279289.XA CN201510279289A CN106285015A CN 106285015 A CN106285015 A CN 106285015A CN 201510279289 A CN201510279289 A CN 201510279289A CN 106285015 A CN106285015 A CN 106285015A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 97
- 239000010959 steel Substances 0.000 title claims abstract description 97
- 238000010276 construction Methods 0.000 claims abstract description 20
- 239000000463 material Substances 0.000 claims description 9
- 230000000875 corresponding Effects 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 4
- 238000010030 laminating Methods 0.000 claims description 3
- 238000004080 punching Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract description 17
- 238000005553 drilling Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 14
- 238000003466 welding Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Abstract
A kind of steel structural roof beam method for rapidly mounting based on location-plate, it is characterised in that comprise the following steps: a Prefabricated steel construction roof girder (1), b prefabricated location-plate (5), the prefabricated active plate of c (2) and the lifting of d steel structural roof beam.The steel structural roof beam Fast Installation mode based on location-plate of the present invention has location-plate and active plate simple in construction, easy to make, safe and reliable, roof girder makes and improves drilling precision, the quick stress of roof girder can be made by location-plate backer's fixed form, reach the advantage making crane unhook purpose in advance and reducing installing engineering construction cost.
Description
Technical field
The present invention relates to a kind of industrial premises steel structure girder installation method, specifically, be a kind of steel structural roof beam method for rapidly mounting based on location-plate.
Background technology
In prince wife Cao pasture Shoudu Iron and Steel Co one phase three cold rolling 7th district main workshop steel structure installation, the installation of roof girder is the biggest, main building steel column is two-tube H profile steel post, material is Q345B, wherein Factory Building span is 36 meters, a length of 33 meters of roof girder, piece weight is 18 tons, and roof girder connected mode is bolt-weld joint.At the scene installation needs to use large-scale hoisting machinery that roof girder is hung, ability pine hook after completing according to construction procedures such as assembling roof girder web connecting plate, fastening bolt, the welding upper and lower flange plate of roof girder, such construction method makes the service efficiency of lifting machine relatively low, and construction cost is bigger.Fig. 8 is the high-strength bolt auxiliary connection bolt-weld joint lifting schematic diagram of known roof girder and steel column bracket.Roof girder is with the high-strength bolt auxiliary connection bolt-weld joint lifting of steel column bracket, and during bolt penetration hole, roof girder needs regulation, coordinates difficulty big, additionally, connecting plate is from great, during installation, workman's construction intensity is high；Crane breaks off relations needs the high-strength bolt in auxiliary connection complete by code requirement installation, and the upper and lower flange plate of roof girder is pressed code requirement and welded complete, and crane could break off relations.The installation integral construction time thus causing roof girder is long, and efficiency is low.
The installation method of the most known roof girder also exists above-mentioned all inconvenience and problem.
Summary of the invention
The purpose of the present invention, is to propose a kind of safe and reliable steel structural roof beam method for rapidly mounting based on location-plate.
For achieving the above object, the technical solution of the present invention is:
A kind of steel structural roof beam method for rapidly mounting based on location-plate, it is characterised in that comprise the following steps:
A, Prefabricated steel construction roof girder
According to design requirement, at processing factory's Prefabricated steel construction roof girder, steel structural roof beam is made by H profile steel；The both sides, end being used for being connected with steel column bracket of roof girder H profile steel are respectively welded two nuts, and two nuts are positioned on same axis；
B, prefabricated location-plate
Location-plate is that rectangular steel plates plays backer's effect, location-plate lower center is provided with long 40-50mm roof girder arcuate groove, the side of arcuate groove be flat end for being abutted against with steel house post bracket, the opposite side of arcuate groove is that double groove is welded and fixed for the top flange plate with roof girder；Roof girder H profile steel is connected on the roof girder top flange plate of end the two pieces of location-plates that be arranged in parallel with steel column bracket, and the installing space of two pieces of location-plates is 120-200mm；Two installations of roof girder connect end and use four pieces of location-plates to make backer, support roof girder with four pieces of location-plates and install；Location-plate uses material identical with roof girder to make, rupture pull force F=roof girder weight X10/417.8 × 10/4 of roof girder, and wherein: 10 is safety coefficient, 4 represent four pieces of location-plates, and F unit is KN；
C, prefabricated active plate
It is the prefabricated two pieces of active plates of each connection end according to roof girder specification, active plate is rectangle, its length is suitable to the web of laminating H profile steel, width arranges four row bolt connecting holes, wherein two row bolt connecting holes are for being connected with the web side of H profile steel, another two row bolt connecting holes are used for being connected with steel column bracket, the connecting hole that rectangular active connecting plate is connected with the web side of H profile steel and the supporting boring of roof girder web；The edge, upper and lower part of every piece of active plate side welds a L-shaped bearing pin, one end of bearing pin is welded admittedly with active plate, the other end can insert steel column bracket connect end nut in formed hinge-coupled, enable active plate centered by nut, 180 ° of rotations；
D, steel structural roof beam lift
A crane horizontal is provided to promote roof girder, the four pieces of location-plate backers making roof girder two connect end overlap with corresponding steel column bracket, and make active plate the most in place with corresponding steel column bracket, high-strength bolt punching rate is accelerated with high-strength bolt, four pieces of location-plate backers make roof girder just can break off relations after completing to twist at the beginning of roof girder high-strength bolt, are rapidly completed roof girder lifting.
The steel structural roof beam method for rapidly mounting based on location-plate of the present invention can also be further achieved by the following technical measures.
Aforesaid method, wherein said L-shaped bearing pin is made by D12 round steel.
Aforesaid method, wherein said nut is M14 nut.
Aforesaid method, wherein said location-plate material is Q345B, size 25X260X120mm steel plate.
After using technique scheme, the steel structural roof beam method for rapidly mounting based on location-plate of the present invention has the advantage that
1, location-plate and active plate simple in construction, easy to make, safe and reliable；
2, roof girder makes and improves drilling precision, can make the quick stress of roof girder by location-plate backer's fixation, reach to make crane unhook purpose in advance；
3, installing engineering construction cost is reduced.
Accompanying drawing explanation
Fig. 1 is the active plate structural representation of the embodiment of the present invention；
Fig. 2 is that the active plate of the embodiment of the present invention couples schematic diagram with the L-shaped pin hinge of roof girder；
Fig. 3 is the nut scheme of installation of the roof girder web both sides of the embodiment of the present invention；
Fig. 4 is the positioning plate structure schematic diagram of the embodiment of the present invention；
Fig. 5 is that the right side of Fig. 4 regards schematic diagram；
Fig. 6 is that the location-plate of the embodiment of the present invention is welded and fixed schematic diagram with roof girder top flange plate；
Fig. 7 is the left view schematic diagram of Fig. 6；
Fig. 8 is the high-strength bolt auxiliary connection bolt-weld joint lifting schematic diagram of known roof girder and steel column bracket；
Fig. 9 is that the roof girder with location-plate of the embodiment of the present invention lifts schematic diagram with steel column bracket high-strength bolt auxiliary connection bolt-weld joint.
In figure: 1 roof girder, 2 active plates, 3L shape bearing pin, 4 nuts, 5 location-plates, 6 arcuate grooves, 7 grooves, 8 pads, 9 bolt connecting holes, 10 steel columns, 11 steel column brackets, 12 high-strength bolt auxiliary connections, 13 lifting points, 14 cranes.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing thereof, the present invention is illustrated further.
Embodiment 1
Schematic diagram is lifted with steel column bracket high-strength bolt auxiliary connection bolt-weld joint referring now to the roof girder with location-plate that Fig. 9, Fig. 9 are the embodiment of the present invention.
The steel structural roof beam method for rapidly mounting based on location-plate of the present invention, it is characterised in that comprise the following steps:
A, Prefabricated steel construction roof girder
Fig. 3 is the nut scheme of installation of the roof girder web both sides of the embodiment of the present invention.According to design requirement, at processing factory's Prefabricated steel construction roof girder 1, steel structural roof beam is made by H profile steel；The both sides, end being used for being connected with steel column bracket of roof girder H profile steel are respectively welded two nuts 4, and two nuts are positioned on same axis；Described nut 4 is M14 nut.
B, prefabricated location-plate 5
Fig. 4 is the positioning plate structure schematic diagram of the embodiment of the present invention, and Fig. 5 is that the right side of Fig. 4 regards schematic diagram.
Location-plate 5 plays backer's effect for rectangular steel plates, location-plate lower center is provided with long 50mm roof girder arcuate groove 6, the side of arcuate groove be flat end for being abutted against with steel house post bracket, the opposite side of arcuate groove is that double groove 7 is for being welded and fixed with the top flange plate of roof girder 1；Roof girder H profile steel is connected on roof girder 1 top flange plate of end the two pieces of location-plates 5 that be arranged in parallel with steel column bracket 12, and the installing space of two pieces of location-plates is 150mm；Two installations of roof girder 1 connect end and use four pieces of location-plates 5 to make backer, support roof girder with four pieces of location-plates and install；Location-plate uses material identical with roof girder to make, rupture pull force F=roof girder weight X10/417.8 × 10/4 of roof girder, and wherein: 10 is safety coefficient, 4 represent four pieces of location-plates, and F unit is KN.Fig. 6 is that the location-plate of the embodiment of the present invention is welded and fixed schematic diagram with roof girder top flange plate, and Fig. 7 is the left view schematic diagram of Fig. 6.
Steel column, roof girder material are Q345B in the present embodiment, and location-plate uses Q345B steel plate to make, and roof girder uses four backers to install, and the roof girder of maximum weight is 17.8t.Can obtain according to force analysis: it is that 17.8T is divided into four stress points that roof girder location-plate bears pulling force.The rupture pull force that roof girder location-plate needs is: 17.8 × 10/4=44.5KN, and the safety coefficient of welding location-plate takes 10, therefore the rupture pull force of roof girder bracket takes 445KN,
Location-plate material selection Q345B, looks into steel performance table and understands: location-plate lifting surface area is: M=F/ δ
=445KN/345MPa=0.0013, wherein M is lifting surface area, and F is rupture pull force, and δ is location-plate thickness.
Using material is that Q345B steel plate makes backer, and lifting surface area is more than 0.0013 i.e. Liftable, uses the steel plate of δ=25mm, a size of 260*120 to make location-plate according to field condition, and weld length is 110mm, and lifting surface area is 0.00275.
C, prefabricated active plate 2
Fig. 1 is the active plate structural representation of the embodiment of the present invention, and Fig. 2 is that the active plate of the embodiment of the present invention couples schematic diagram with the L-shaped pin hinge of roof girder.
It is the prefabricated two pieces of active plates 2 of each connection end according to roof girder specification, active plate is rectangle, its length is suitable to the web of laminating H profile steel, width arranges four row bolt connecting holes, wherein two row bolt connecting holes are for being connected with the web side of H profile steel, another two row bolt connecting holes are used for being connected with steel column bracket, the connecting hole that rectangular active connecting plate is connected with the web side of H profile steel and the supporting boring of roof girder web；The edge, upper and lower part of every piece of active plate side welds a L-shaped bearing pin, one end of bearing pin is welded admittedly with active plate, the other end can insert steel column bracket connect end nut 4 in formed hinge-coupled, enable active plate centered by nut, 180 ° of rotations；Described L-shaped bearing pin is made by D12 round steel.
D, steel structural roof beam lift
Crane 14 level is provided to promote roof girder 1, the four pieces of location-plate backers making roof girder two connect end overlap with corresponding steel column bracket, and make active plate 2 the most in place with corresponding steel column bracket, high-strength bolt punching rate is accelerated with high-strength bolt, four pieces of location-plate backers make roof girder just can break off relations after completing to twist at the beginning of roof girder high-strength bolt, are rapidly completed roof girder lifting.
The operation principle of the steel structural roof beam method for rapidly mounting based on location-plate of the present invention:
1, utilize slip-knot device to make high-strength bolt connecting plate and roof girder be integrally forming when installation, improve bolt penetration hole installation rate simultaneously so that alleviate workman's construction intensity when roof girder installation and improve efficiency of construction.
2, utilize the backer of welding on roof girder to be abutted against with steel column bracket (to be abutted against: on roof girder, the backer of welding contacts with steel column bracket, roof girder deadweight is utilized to make roof girder hang on bracket), make the roof girder can be in quick stress stable, high-strength bolt auxiliary connection is quickly in can installation state, need not too much regulate, reach the effect of lower flange welding on roof girder simultaneously, enable crane rapid unhooking, improve efficiency of construction.
The present invention has substantive distinguishing features and significant technological progress, the steel structural roof beam method for rapidly mounting based on location-plate of the present invention, connect active plate mounting means and high-strength bolt connecting plate can be installed quickly and safely, and drilling precision can be improved in roof girder makes, make backer's fixed form with location-plate and can make the quick stress of roof girder, reach unhook purpose.The steel structural roof beam method for rapidly mounting based on location-plate of the present invention meets Structural strength calls, and it is simple for production that roof girder installation exercise meets construction requirement, active plate and location-plate, simple to operate, safe and reliable, quick for installation.
Above example is used for illustrative purposes only, rather than limitation of the present invention, person skilled in the relevant technique, without departing from the spirit and scope of the present invention, it is also possible to make various conversion or change.Therefore, the technical scheme of all equivalents also should belong to scope of the invention, should be limited by each claim.
Claims (4)
1. a steel structural roof beam method for rapidly mounting based on location-plate, it is characterised in that comprise the following steps:
A, Prefabricated steel construction roof girder (1)
According to design requirement, in processing factory's Prefabricated steel construction roof girder (1), steel structural roof beam is made by H profile steel；The both sides, end being used for being connected with steel column bracket of roof girder H profile steel are respectively welded two nuts (4), and two nuts are positioned on same axis；
B, prefabricated location-plate (5)
Location-plate (5) is that rectangular steel plates plays backer's effect, location-plate lower center is provided with long 40-50mm roof girder arcuate groove (6), the side of arcuate groove be flat end for being abutted against with steel house post bracket, the opposite side of arcuate groove is double groove (7) to be welded and fixed for the top flange plate with roof girder (1)；Roof girder H profile steel is connected on roof girder (1) top flange plate of end the two pieces of location-plates (5) that be arranged in parallel with steel column bracket (12), and the installing space of two pieces of location-plates is 120-200mm；Two installations of roof girder (1) connect end and use four pieces of location-plates (5) to make backer, support roof girder with four pieces of location-plates and install；Location-plate uses material identical with roof girder to make, rupture pull force F=roof girder weight X10/417.8 × 10/4 of roof girder, and wherein: 10 is safety coefficient, 4 represent four pieces of location-plates, and F unit is KN；
C, prefabricated active plate (2)
It is the prefabricated two pieces of active plates (2) of each connection end according to roof girder specification, active plate is rectangle, its length is suitable to the web of laminating H profile steel, width arranges four row bolt connecting holes, wherein two row bolt connecting holes are for being connected with the web side of H profile steel, another two row bolt connecting holes are used for being connected with steel column bracket, the connecting hole that rectangular active connecting plate is connected with the web side of H profile steel and the supporting boring of roof girder web；The edge, upper and lower part of every piece of active plate side welds a L-shaped bearing pin, one end of bearing pin is welded admittedly with active plate, the other end can insert steel column bracket connect end nut (4) in formed hinge-coupled, enable active plate centered by nut, 180 ° of rotations；
D, steel structural roof beam lift
A crane horizontal is provided to promote roof girder, the four pieces of location-plate backers making roof girder two connect end overlap with corresponding steel column bracket, and make active plate (2) the most in place with corresponding steel column bracket, high-strength bolt punching rate is accelerated with high-strength bolt, four pieces of location-plate backers make roof girder just can break off relations after completing to twist at the beginning of roof girder high-strength bolt, are rapidly completed roof girder lifting.
2. steel structural roof beam method for rapidly mounting based on location-plate as claimed in claim 1, it is characterised in that described L-shaped bearing pin is made by D12 round steel.
3. steel structural roof beam method for rapidly mounting based on location-plate as claimed in claim 1, it is characterised in that described nut (4) is M14 nut.
4. steel structural roof beam method for rapidly mounting based on location-plate as claimed in claim 1, it is characterised in that described location-plate (5) material is Q345B, size 25X260X120mm steel plate.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510279289.XA CN106285015A (en) | 2015-05-28 | 2015-05-28 | Steel structural roof beam method for rapidly mounting based on location-plate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510279289.XA CN106285015A (en) | 2015-05-28 | 2015-05-28 | Steel structural roof beam method for rapidly mounting based on location-plate |
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| CN106285015A true CN106285015A (en) | 2017-01-04 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109469337A (en) * | 2018-12-19 | 2019-03-15 | 北京首钢建设集团有限公司 | A kind of frame roof girder steel utilizes the installation method of flange plate end fission |
| CN111287468A (en) * | 2020-03-19 | 2020-06-16 | 中国二十二冶集团有限公司 | Method for mounting super high-rise steel beam |
| CN111980296A (en) * | 2020-08-10 | 2020-11-24 | 中国十七冶集团有限公司 | Solid-web type horizontal steel beam high-altitude installation temporary fixing structure and implementation method |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02153168A (en) * | 1988-12-06 | 1990-06-12 | Shimizu Corp | Field welding of steel structural beam |
| JP2000054635A (en) * | 1998-08-06 | 2000-02-22 | Nobutaka Kondo | Attaching method for support member in h-steel beam joint spot and its support member |
| JP2000073569A (en) * | 1998-08-31 | 2000-03-07 | Komai Tekko Inc | Splice plate holding jig for connecting beam |
| CN202482998U (en) * | 2011-11-10 | 2012-10-10 | 中国二十冶集团有限公司 | Connection positioning device for high-altitude installation of large cross-section steel beam |
| CN202745396U (en) * | 2012-08-04 | 2013-02-20 | 深圳建升和钢结构建筑安装工程有限公司 | Dismountable steel girder butt joint location fastener |
| CN103104041A (en) * | 2013-03-08 | 2013-05-15 | 郑州大学 | Assembled framework beam-column joint adopting transverse connection and construction method thereof |
| CN203499274U (en) * | 2013-09-27 | 2014-03-26 | 中国建筑第八工程局有限公司 | Positioning spacers applied to steel beam elevation control |
| CN104047433A (en) * | 2014-06-20 | 2014-09-17 | 中建五局第三建设有限公司 | Method for installing structural steel beam in steel structure work |
-
2015
- 2015-05-28 CN CN201510279289.XA patent/CN106285015A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02153168A (en) * | 1988-12-06 | 1990-06-12 | Shimizu Corp | Field welding of steel structural beam |
| JP2000054635A (en) * | 1998-08-06 | 2000-02-22 | Nobutaka Kondo | Attaching method for support member in h-steel beam joint spot and its support member |
| JP2000073569A (en) * | 1998-08-31 | 2000-03-07 | Komai Tekko Inc | Splice plate holding jig for connecting beam |
| CN202482998U (en) * | 2011-11-10 | 2012-10-10 | 中国二十冶集团有限公司 | Connection positioning device for high-altitude installation of large cross-section steel beam |
| CN202745396U (en) * | 2012-08-04 | 2013-02-20 | 深圳建升和钢结构建筑安装工程有限公司 | Dismountable steel girder butt joint location fastener |
| CN103104041A (en) * | 2013-03-08 | 2013-05-15 | 郑州大学 | Assembled framework beam-column joint adopting transverse connection and construction method thereof |
| CN203499274U (en) * | 2013-09-27 | 2014-03-26 | 中国建筑第八工程局有限公司 | Positioning spacers applied to steel beam elevation control |
| CN104047433A (en) * | 2014-06-20 | 2014-09-17 | 中建五局第三建设有限公司 | Method for installing structural steel beam in steel structure work |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109469337A (en) * | 2018-12-19 | 2019-03-15 | 北京首钢建设集团有限公司 | A kind of frame roof girder steel utilizes the installation method of flange plate end fission |
| CN111287468A (en) * | 2020-03-19 | 2020-06-16 | 中国二十二冶集团有限公司 | Method for mounting super high-rise steel beam |
| CN111980296A (en) * | 2020-08-10 | 2020-11-24 | 中国十七冶集团有限公司 | Solid-web type horizontal steel beam high-altitude installation temporary fixing structure and implementation method |
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