CN101324146A - Construction method for hanging wide span arcuated open-web beam - Google Patents
Construction method for hanging wide span arcuated open-web beam Download PDFInfo
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- CN101324146A CN101324146A CNA2008100555599A CN200810055559A CN101324146A CN 101324146 A CN101324146 A CN 101324146A CN A2008100555599 A CNA2008100555599 A CN A2008100555599A CN 200810055559 A CN200810055559 A CN 200810055559A CN 101324146 A CN101324146 A CN 101324146A
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- laced beam
- laced
- crane
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Abstract
The invention relates to a large-span arc laced beam hoisting construction method used for constructing an ellipsoid roof. The method comprises the steps that a main crane hoists in a stand-alone way at one side beyond the span and delivers the laced beam to be within the span, one end of the laced beam is hoisted by an assistant crane beyond the span at the other side of a building, and dual-machine lifting and hoisting is formed by hoisting point shifting on the laced beam so as to jointly hoist and position the laced beam. The invention is a brand new dual-machine delivering lifting and hoisting construction method, and solves the hoisting problem of the large-span steel structure laced beam under special conditions that a construction field can not be provided within the span of the building, the dual-machine lifting and hoisting can not be carried out due to the obstruction of the running line of the cranes at the two sides of the building, and a gliding method can not be used for hoisting, etc., and the span of a hoisting structural component can be greatly improved, thus improving construction safety, guaranteeing construction quality and shortening construction period.
Description
Technical field
The present invention relates to the structure installation Technology in a kind of building construction process, specifically a kind of construction method for hanging wide span arcuated open-web beam.
Background technology
At present, structural steelwork develops rapidly in the domestic construction industry, and the design-build of the building of large-span space structure also is more and more.At the requirement of space structures engineering development, press for and have the structure installation Technology that adapts with it.For the large-span steel laced beam, present hanging method can reduce: 1, integral body is striden outer unit lift-on/lift-off system; 2, unit lift-on/lift-off system in integral body is striden; 3, integral body is striden outer or is striden interior two-shipper and lifts method; 4, stride outer two-shipper and lift method; 5, stride interior segmental hoisting high-altitude spelling method; 6, accumulation slippage is installed method.
Integral body is striden outer unit lift-on/lift-off system, under the limited situation of long span building and hoisting power, might can't lift and puts in place; Unit or two-shipper lift-on/lift-off system in striding all require to have the place that adapts to crane erect-position and member placement in striding; Stride outer two-shipper and lift method, require to have assembly unit, the placement place of being hung member yet in striding, perhaps requiring does not have obstruction on the course of pedrail crane; Segmental hoisting high-altitude spelling method in striding, the place that requires to have the setting of the interim strong point and member spelling and deposit in striding has shortcomings such as work high above the ground is many, installation accuracy is poor, installation period is long; Accumulation slippage is installed method, only is applicable to that the member on the horizontal plane is installed, and for the installation of the laced beam member on the vertical curved surface (as the ellipsoid roof), this method is inapplicable.
Summary of the invention
Purpose of the present invention just provides a kind of construction method for hanging wide span arcuated open-web beam, to satisfy the use needs of large-span space structure construction and installation in the building construction process.
The object of the present invention is achieved like this: a kind of construction method for hanging that is used to build the wide span arcuated open-web beam on ellipsoid roof, and this method is:
(1) after the assembly unit preliminary treatment is carried out to laced beam in the job site outside building is striden, 1-5 number five hangers of welding on the laced beam upper chord, wherein 1-4 number four hangers are distributed on the laced beam in order, No. 5 hangers are welded on the laced beam end near No. 4 hangers, and the laced beam other end is no hanger end; Lifting rope of each bolt on 1, No. 2 and 3, No. 4 hangers afterwards, Joining clasp and sling on No. 5 hangers;
(2) side has main crane erect-position outside building is striden, and opposite side has secondary crane erect-position; Main hoist lifting hook hook 1, No. 2 and 3, No. 4 hangers on two lifting ropes after, unit lifting laced beam is delivered to laced beam in building strides;
(3) after laced beam is sent and is put in place, main hoist lifting hook falls, the no hanger end of laced beam is transferred on the structure side bar of building one side, and the other end of laced beam is unsettled to be transferred to be lower than building to construction platform in the side structure side bar or the scaffold end face built on construction platform;
(4) secondary hoist lifting hook drops to the end that laced beam is equipped with No. 5 hangers, by manually the sling on No. 5 hangers being articulated on the secondary hoist lifting hook;
(5) secondary crane plays hook, the end that laced beam is equipped with No. 5 hangers is sling and is suspended after laced beam is up to the standard state, at the strong point place of structure side bar to laced beam, by manually laced beam being fixed on the structure side bar with jack, after this main crane pine hook is extractd the lifting rope sling on the hanger 3, No. 4;
(6) arm of main crane is faced upward bar, makes main hoist lifting hook be in the centre position of 1, No. 2 hanger top, plays hook then, main crane is reached and keeps stress, is keeping under the stable condition, removes fixing the use jack of previous step in suddenly;
(7) major and minor crane plays hook simultaneously, and two-shipper lifts laced beam, the arm volt bar of main crane, simultaneously the arm of secondary crane is faced upward bar, the two ends of laced beam can be lifted respectively on the structure side bar of building both sides, to be welded firmly after, major and minor crane pine hook, hoisting process finishes.
The operating principle of hanging method of the present invention is the unit lifting outside striding of main crane, with laced beam be delivered in the air stride in, the secondary crane of the other side of building hangs an end of laced beam, mode by the conversion of main crane suspension centre forms two-shipper and lifts again, at last, two cranes are jointly with the laced beam hoisted in position.Formed a kind of " two-shipper is passed and lifted " construction method for hanging that is different from the ellipsoid roof large span arc steel work laced beam of existing various hanging methods thus.
The invention has the advantages that:
1, solved the construction plant can't be provided in building is striden, building both sides crane track route is obstructed and can't carry out the lifting problem that two-shipper lifts, can not use large-span steel laced beams in particular cases such as gliding method lifting.
2, under the certain situation of hoisting power, improved the span of hoisting structure spare greatly.
Because in particular cases above-mentioned, prior art can only be to adopt big specification crane to stride outer whole unit lifting.If main crane laced beam all the maximum working radius under heavy load be R
1, the maximum span K of this crane steel construction piece that can lift so
1For:
K
1＝2(R
1-Δ)-------①
If employing this method is same, establish main crane laced beam all under heavy load maximum working radius be R
1, because secondary crane is only born 1/2 of laced beam weight, establishing secondary crane is R at half maximum working radius under heavy load of laced beam
2, this method maximum span K that can realize then
2Have following relation to have (referring to Fig. 1) with maximum working radius:
2Δ+K
2＝R
1+R
2+K
2/2 -------②
Suppose that major and minor crane specification is identical, the moment variations that causes during in conjunction with the pitching of crane armed lever then has:
R
2≈1.8R
1 -------③
Will be 3. the formula substitution 2. formula get:
K
2＝5.6R
1-4Δ -------④
Will be 1. the formula substitution 4. formula get:
K
2＝2K
1+1.6R
1 -------⑤
Suppose R
1=20m, Δ=5m, then: the maximum span of the steel construction piece that the employing prior art can lift: K
1=30m
And same hypothesis adopts the maximum span of the steel construction piece that this method can lift: K with the crane of two same specifications
2=92m
As seen, the effect that adopts this method can lift the span increase of steel construction piece is fairly obvious.
3, compare with the hanging method of segmental hoisting high-altitude spelling, because this method is once to lift to put in place,, not only improved working security greatly so reduced work high above the ground significantly and secondary is had bad luck process, but also guaranteed construction quality, shortened construction period.
Description of drawings
Fig. 1 is a relatively schematic diagram of lifting span.
Fig. 2 is hanger on the arcuated open-web beam upper chord and a lifting rope layout schematic diagram among the present invention.
Fig. 3 is a main crane unit delivery process schematic diagram among the present invention.
Fig. 4 is a secondary crane hook schematic diagram among the present invention.
Fig. 5 is that two-shipper lifts schematic diagram in place among the present invention.
The specific embodiment
The present invention is the job practices that lifting is used to build the large span arc steel work laced beam on ellipsoid roof.Its concrete steps are:
(1) assembly unit of laced beam and hanger are arranged and the lifting rope colligation.
Laced beam is transported to building and is striden outer job site after factory's sectional making finishes, and carries out the integral assembling preliminary treatment of large-span steel laced beam in the lifting position.The assembly unit preliminary treatment of laced beam is exactly that the laced beam of sectional making is assembled into an integral body in the welding of lifting position, mends brush and paint through defect detecting test is qualified after.
After assembly unit is finished, on the upper chord of laced beam 8, weld five hangers (1-5) by position shown in Figure 2.Wherein, 1-4 number four hangers distribute on the length direction of laced beam 8 and firm welding, are used for the lifting of main crane.1-4 number four hanger on the length direction of laced beam with uniform be good.No. 5 hangers are welded on the right part near the laced beam 8 of No. 4 hangers, are used for the hook of taking by force of secondary crane.Left part at the laced beam 8 of No. 1 hanger outside is not provided with hanger, is no hanger end.For the sake of security, the weld seam of hanger and laced beam also should carry out defect detecting test.
The colligation form of lifting rope is: lifting rope 9 of bolt on 1, No. 2 hanger, lifting rope 10 of bolt on 3, No. 4 hangers; On No. 5 hangers, connect snap ring and sling, to make things convenient for subsequent operation.
(2) main crane unit lifting is sent in striding.
As shown in Figure 3, main crane 11 is striden outer erect-position in building left side, main hoist lifting hook 7 hook 1, No. 2 and 3, No. 4 hangers on two lifting ropes after, unit lifting laced beam 8 tries to hang afterwards from the air laced beam being delivered in building strides.
(3) main crane is finished in the air and is sent.
After laced beam 8 was sent and put in place, main hoist lifting hook 7 fell, and the laced beam left part was transferred on the structure side bar 15 in building left side, and the contact point by 15 pairs of laced beams of structure side bar supports; The unsettled end face (Fig. 4) of transferring to the scaffold 13 that is lower than the construction platform 14 in the structure side bar of building right side or builds on construction platform of the right-hand member of laced beam 8 is so that sending of main crane finished in next step " secondary crane hook " operation thus in the air.
(4) secondary crane hook.
As seen from Figure 4, secondary crane 12 erect-position outside stride on the right side of building, when the right-hand member of laced beam 8 is unsettled transfer to the end face of the scaffold 13 that is lower than the construction platform 14 in the structure side bar of building right side or on construction platform, builds after, secondary hoist lifting hook 6 drops to No. 5 hanger places of laced beam right-hand member, by manually the sling on No. 5 hangers being hung on the secondary hoist lifting hook 6.In this process, main hoist lifting hook 7 keeps stress.
(5) conversion of the suspension centre on the laced beam.
12 hooks of secondary crane, the right-hand member of laced beam 8 sling after laced beam is up to the standard state, suspend, strong point place, left part at 15 pairs of laced beams of building left side structure side bar, be fixed on the structure side bar 15 from both sides with laced beam 8 by two jacks of artificial usefulness, topple with the laced beam generation side direction that prevents arc.Fixing used jack is a kind of common tool by lifting of manual pulling chain or locking member.Because arcuated open-web beam has certain camber that rises, so prevent that the laced beam side direction from toppling is important measures that guarantee this method smooth implementation.
After this, main crane 11 loose hooks are extractd the sling on the hanger 3, No. 4, can finish the suspension centre conversion on the laced beam smoothly.
(6) two-shipper lifts preparation.
The arm of main crane is faced upward bar, makes suspension hook be in the centre position (Fig. 5) of 1, No. 2 hanger top, plays hook then and main hoist lifting hook 7 is reached and keeps stress (being about half that laced beam is conducted oneself with dignity).Keeping under the stable condition, removing the fixedly jack of usefulness of previous step in rapid two, for two-shipper lifts ready.
Before removing jack, allow main crane play hook, apply certain active force, topple for the side direction that prevents generation laced beam when removing jack exactly.
(7) two-shipper lifts in place.
After carrying out above-mentioned preparation, major and minor crane plays hook simultaneously, and two-shipper lifts laced beam, faces upward bar by the arm volt bar of main crane 11 and the arm of secondary crane 12, laced beam 8 liftings are put in place (as shown in Figure 5), and the two ends that are about to laced beam 8 lift respectively on the structure side bar of building both sides.After the structure side bar firm welding of the two ends of laced beam 8 and building both sides, major and minor crane pine hook, hoisting process finishes immediately.
Claims (3)
1, a kind of construction method for hanging that is used to build the wide span arcuated open-web beam on ellipsoid roof is characterized in that this method is:
(1) after the assembly unit preliminary treatment is carried out to laced beam in the job site outside building is striden, 1-5 number five hangers of welding on the laced beam upper chord, wherein 1-4 number four hangers are distributed on the laced beam in order, No. 5 hangers are welded on the laced beam end near No. 4 hangers, and the laced beam other end is no hanger end; Lifting rope of each bolt on 1, No. 2 and 3, No. 4 hangers afterwards, Joining clasp and sling on No. 5 hangers;
(2) side has main crane erect-position outside building is striden, and opposite side has secondary crane erect-position; Main hoist lifting hook hook 1, No. 2 and 3, No. 4 hangers on two lifting ropes after, unit lifting laced beam is delivered to laced beam in building strides;
(3) after laced beam is sent and is put in place, main hoist lifting hook falls, the no hanger end of laced beam is transferred on the structure side bar of building one side, and the other end of laced beam is unsettled to be transferred to be lower than building to construction platform in the side structure side bar or the scaffold end face built on construction platform;
(4) secondary hoist lifting hook drops to the end that laced beam is equipped with No. 5 hangers, by manually the sling on No. 5 hangers being articulated on the secondary hoist lifting hook;
(5) secondary crane plays hook, the end that laced beam is equipped with No. 5 hangers is sling and is suspended after laced beam is up to the standard state, at the strong point place of structure side bar to laced beam, by manually laced beam being fixed on the structure side bar with jack, main then crane pine hook is extractd the lifting rope sling on the hanger 3, No. 4;
(6) main crane is faced upward bar, makes main hoist lifting hook be in the centre position of 1, No. 2 hanger top, plays hook then, main crane is reached and keeps stress, is keeping under the stable condition, removes fixing the use jack of previous step in suddenly;
(7) major and minor crane plays hook simultaneously, and two-shipper lifts laced beam, the arm volt bar of main crane, simultaneously the arm of secondary crane is faced upward bar, the two ends of laced beam can be lifted respectively on the structure side bar of building both sides, to be welded firmly after, major and minor crane pine hook, hoisting process finishes.
2, the construction method for hanging of wide span arcuated open-web beam according to claim 1 is characterized in that laced beam assembly unit preliminary treatment, is the laced beam of sectional making is assembled into an integral body in the welding of lifting position, mends brush and paint through defect detecting test is qualified after.
3, the construction method for hanging of wide span arcuated open-web beam according to claim 1 is characterized in that 1-4 number four hangers are uniform on the length direction of laced beam.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2008100555599A CN100549348C (en) | 2008-08-11 | 2008-08-11 | Construction method for hanging wide span arcuated open-web beam |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2008100555599A CN100549348C (en) | 2008-08-11 | 2008-08-11 | Construction method for hanging wide span arcuated open-web beam |
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| Publication Number | Publication Date |
|---|---|
| CN101324146A true CN101324146A (en) | 2008-12-17 |
| CN100549348C CN100549348C (en) | 2009-10-14 |
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|---|---|---|---|
| CNB2008100555599A Expired - Fee Related CN100549348C (en) | 2008-08-11 | 2008-08-11 | Construction method for hanging wide span arcuated open-web beam |
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