CN103510712A - Right-angled-Z-shaped aerial butt-joint construction method of multi-layer H-shaped steel columns - Google Patents
Right-angled-Z-shaped aerial butt-joint construction method of multi-layer H-shaped steel columns Download PDFInfo
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- CN103510712A CN103510712A CN201210221123.9A CN201210221123A CN103510712A CN 103510712 A CN103510712 A CN 103510712A CN 201210221123 A CN201210221123 A CN 201210221123A CN 103510712 A CN103510712 A CN 103510712A
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Abstract
Provided is a right-angled-Z-shaped aerial butt-joint construction method of multi-layer H-shaped steel columns. The right-angled-Z-shaped aerial butt-joint construction method of the multi-layer H-shaped steel columns replaces an original welding technology through a ground jig frame. The right-angled-Z-shaped aerial butt-joint construction method of the multi-layer H-shaped steel columns comprises the steps that (1) after a first H-shaped steel column is hoisted in place, and elevation and locating measurement are accomplished, the H-shaped steel column is immediately fixed through foundation bolts; (2) secondary grouting is carried out, hoisting of a second H-shaped steel column is carried out after the strength of concrete reaches 80%, and hoisting operation and welding operation of the second H-shaped steel column are carried out through a 50T crane after pedals, safety ropes and safety fences are installed; (3) after hoisting operation and welding operation are accomplished, aerial butt-joint of the next H-shaped steel column can be accomplished through the right-angled-Z-shaped aerial butt-joint construction method of the multi-layer H-shaped steel columns. When the right-angled-Z-shaped aerial butt-joint construction method of the multi-layer H-shaped steel columns is used for carrying out butt-joint construction on the two H-shaped steel columns, the complex technological process of ground jig frame welding is greatly simplified, crane machine-team expenses and labor cost can be reduced by more than 35%, the construction progress is improved by 45%, the requirements of the design and the standard are met, and the purpose of reducing cost and the purpose of shortening the construction period are achieved.
Description
Technical field
The present invention relates to the construction field of steel work in building construction process, especially multi-layer H steel column " ┕ ┑ " shape is docked construction in the air.
Background technology
In recent years, fast development along with industrial economy, for shortening the construction period, industrial premises adopts steel work H steel more, because the multi-layer H steel column overlength that some workshop of technological requirement is used (long more than 30 meter, heavy nearly 20 tons), fabrication and installation quality is difficult to guarantee, and owing to being subject to the restriction of structure manufacture, transportation, job practices and the field condition construction speed that caused multi-layer H section steel mast problems affect, extended the duration, improved engineering cost and installation quality has also reduced.
Summary of the invention
In order to overcome, in conventional construction method, be subject to the restriction of structure manufacture, transportation, job practices and field condition and the construction speed that caused multi-layer H section steel mast problems affect and then claim for eot, the deficiency such as cost increases and installation quality is low, the invention provides a kind of multi-layer H shape steel column " ┕ ┑ " shape and dock construction in the air, the restriction of this engineering method Bu Shou place, controlling well under the prerequisite of welding deformation quality, can the good multi-layer H section steel mast of Fast Installation, reliable in quality, and the many ways that are conducive to hanging device are selected.
The present invention solves the technical scheme that its technical problem takes: this construction has been broken former use ground moulding bed welding procedure, after first segment H type post hoisted in position absolute altitude, location survey complete, make immediately stone bolt fix steel column, after carry out back-grouting, when concrete strength reaches the lifting of carrying out two segmented columns after 80%, after installing foot rest, safety rope, safety barrier, use 50T crane to carry out lifting and the welding job of two segmented columns, after lifting and welding job complete, can continue to use this engineering method to complete the aerial docking of deutomerite steel column.Use this construction to carry out two segmented column butt welding constructions, greatly simplified ground moulding bed and welded complicated activities, reduced crane machine-team expense, labour cost approximately more than 35%, construction speed improves 45%, meet design and code requirement, reach and reduce costs, the object of reduction of erection time.
The invention has the beneficial effects as follows: economic benefit embodies outstanding, do not need to make moulding bed, the on-the-spot aerial construction of having welded, advanced technology, speed of application is fast, save the duration, for post facility, install and won grace time, and be conducive to the promotion and application in the docking of narrow operation area multi-layer H section steel mast.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the invention will be further described.
Fig. 1 is in welding process, to be solder technology parameter.
The lateral view of H steel column when Fig. 2 is vertical lifting welding.
The front view of H steel when Fig. 3 is vertical lifting welding.
2 places in Fig. 2 and Fig. 3 represent the weld seam of weld.
The specific embodiment
The measureing equipment that this engineering adopts is transit DJ2-1, level gauge SZ3, invar tape 30m/50m, transportation and lifting appliance QY50 ton mobile crane, and welding equipment has AC welding set BX-300, drying baker ZKN-100, and defect-detecting equipment is ultrasonic flaw detector.Construction key step is as follows.
(1) basis handing-over check, carries out inspection record, according to controlling orientation axis, axis is in length and breadth guided on H steel column basis to the orientation axis sealing that must overlap.According to the scale error of position line, must not surpass and survey line again, orientation axis must overlap or be parallel, orientation axis should have owner, management, installation joint inspection to check and accept, and carry out middle friendship record, according to lifting order, a segmented column is installed, after absolute altitude and skew centering, civil engineering side carries out second pouring immediately, and concrete strength carries out two segmented column liftings after surpassing 80%.
(2) installation foot pedal, safety rope, safety barrier, after installing, with QY50 ton mobile crane vertical lifting steel column to installation site and lower segmented column, align the absolute altitude of first adjusting in place, aligning upper and lower radius off-set joint, torsion, then proofreading and correct pillar verticality with transit DJ2-1, deviation is in standard allowed band, tension cable wind rope, welding, moulding, plucks suspension hook support system and connects.Engineering main member material is Q345B, and steel column connects employing groove full penetration, on the basis of qualification of welding procedure, determines that the welding rod of welding is Φ 4 ~ Φ 6 carbon steel J422 type welding rods, and solder technology parameter as shown in Figure 1.
(3) welding rod should cure and be incubated with drying baker ZKN-100 according to the regulation of quality certificate before using, and cures number of times and is no more than twice.
(4) before welding, the iron rust within the scope of welding rod edge 30-50mm, burr, greasy dirt etc. should be cleaned out, to reduce the defect factors that produces welding pore.Continuous sequence is answered in outer welding, after one deck weld seam completes, should clear up in time, and when crackle appears in weld seam, welder should not take the liberty to decide matters by oneself, and should declare person in charge of the technology aspect, investigates thoroughly reason, proposes can process after repairing measures.
(5) joint bevel is processed, commissure shown in (2) in Fig. 2 and Fig. 3, bevel angle is 30 degree, before lifting, check the angle of groove and glacing flatness checked, polished and repairing treatment in position impaired and that do not reach requirement, qualified after, the groove at butt joint position and near grinding process within the scope of 2CM, until expose metallic luster, during welding, two welders, in the welding of relative position constant speed, reduce welding deformation and welding stress.
(6) second times from first pass arcing point 50-100mm, and welding rod translational speed is slowed down at turning, rounding off, and a joint does not interrupt being soldered continuously, and welder is soldered each node by own steel seal Da welding position.All docking points, weld seam carries out 100% ultrasonic flaw detection after completing visual inspection, detects operative norm " Steel Structure Weld and defect detection on ultrasonic basis and interpretation of result " (GB11345-89).
(7) in welding process, as being found weld seam, there is defect, stops immediately welding, carry out carbon arc air gouging removal of defects, after defect is cleared up completely, weld again.
After welder's welding completes, should clear up in time welding slag, carry out visual inspection, require weld metal surface soldered even, must not there be the defects such as crackle slag inclusion, overlap, hole burning, arc crater, pinhole, and remove the splash of weld zone, make weldquality reach design and code requirement.
(8) to underproof weld seam, according to its defective locations, the degree of depth, the excision of employing carbon arc air gouging, there is the weld seam of defect in ultrasonic testing/ ultrasonic examination inspection, from defect two ends, respectively add 50mm as removing position, by the welding procedure that weld seam is identical, carry out repair welding, same method and standard are tested, and must not reprocess over twice in same position.
(9) welded and passed examination after the aerial docking of this H shape steel column complete, then can continue according to this engineering method the aerial docking of lower segmented column.
Such scheme industry technician can realize by industry technology means.
Claims (1)
1. a multi-layer H steel column " ┕ ┑ " shape is docked construction in the air, it is characterized in that: this engineering method is not used and in traditional engineering method, used ground moulding bed welding procedure, after first segment H type post hoisted in position absolute altitude, location survey complete, make immediately stone bolt fix steel column, after carry out back-grouting, when concrete strength reaches the lifting of carrying out two segmented columns after 80%, after installing foot rest, safety rope, safety barrier, use 50T crane to carry out lifting and the welding job of two segmented columns, after lifting and welding complete, can continue, by this engineering method, lower joint steel column is installed.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210221123.9A CN103510712A (en) | 2012-06-29 | 2012-06-29 | Right-angled-Z-shaped aerial butt-joint construction method of multi-layer H-shaped steel columns |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210221123.9A CN103510712A (en) | 2012-06-29 | 2012-06-29 | Right-angled-Z-shaped aerial butt-joint construction method of multi-layer H-shaped steel columns |
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| CN103510712A true CN103510712A (en) | 2014-01-15 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104652829A (en) * | 2015-01-23 | 2015-05-27 | 中铁四局集团钢结构有限公司 | Construction method for self-lifting folding positioning operation system |
| CN109991311A (en) * | 2019-04-09 | 2019-07-09 | 中国十七冶集团有限公司 | A kind of workshop column reinforcing method and its detection device |
Citations (4)
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| JPH02161043A (en) * | 1988-12-14 | 1990-06-20 | Shimizu Corp | Joint structure of steel pipe concrete column, steel pipe concrete column, and construction thereof |
| JPH06257226A (en) * | 1993-03-09 | 1994-09-13 | Kajima Corp | Joint construction of square steel pipe post or square steel pipe concrete post |
| CN201351313Y (en) * | 2009-01-15 | 2009-11-25 | 西安建筑科技大学 | Concrete special-shaped column equipped with lattice type channel steel framework-reinforced concrete beam frame joint |
| CN201351310Y (en) * | 2009-01-15 | 2009-11-25 | 西安建筑科技大学 | Concrete special-shaped column equipped with lattice type channel steel framework-steel reinforced concrete beam-frame joint |
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2012
- 2012-06-29 CN CN201210221123.9A patent/CN103510712A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02161043A (en) * | 1988-12-14 | 1990-06-20 | Shimizu Corp | Joint structure of steel pipe concrete column, steel pipe concrete column, and construction thereof |
| JPH06257226A (en) * | 1993-03-09 | 1994-09-13 | Kajima Corp | Joint construction of square steel pipe post or square steel pipe concrete post |
| CN201351313Y (en) * | 2009-01-15 | 2009-11-25 | 西安建筑科技大学 | Concrete special-shaped column equipped with lattice type channel steel framework-reinforced concrete beam frame joint |
| CN201351310Y (en) * | 2009-01-15 | 2009-11-25 | 西安建筑科技大学 | Concrete special-shaped column equipped with lattice type channel steel framework-steel reinforced concrete beam-frame joint |
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| 耿云峰: "论钢结构工业厂房的设计与施工", 《今日科苑》, 23 October 2008 (2008-10-23) * |
| 邵鹍等: "钢结构重型工业厂房安装技术研究", 《科技致富向导》, no. 23, 10 August 2010 (2010-08-10) * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104652829A (en) * | 2015-01-23 | 2015-05-27 | 中铁四局集团钢结构有限公司 | Construction method for self-lifting folding positioning operation system |
| CN109991311A (en) * | 2019-04-09 | 2019-07-09 | 中国十七冶集团有限公司 | A kind of workshop column reinforcing method and its detection device |
| CN109991311B (en) * | 2019-04-09 | 2021-06-11 | 中国十七冶集团有限公司 | Factory building column reinforcing method and weld joint detection device thereof |
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Application publication date: 20140115 |