CN105110180B - The hoisting method of the asymmetric thing of structure - Google Patents
The hoisting method of the asymmetric thing of structure Download PDFInfo
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- CN105110180B CN105110180B CN201510483230.2A CN201510483230A CN105110180B CN 105110180 B CN105110180 B CN 105110180B CN 201510483230 A CN201510483230 A CN 201510483230A CN 105110180 B CN105110180 B CN 105110180B
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Abstract
The present invention discloses a kind of hoisting method of the asymmetric thing of structure：(1) position, the position of actual center gravity line and the offset direction of the actual center gravity line relative to the geometric center lines and the offset distance of the geometric center lines for determining the asymmetric thing of structure are calculated；(2) geometric center lines based on determined by are fixed on hoisting platform in advance and move the offset distance along the offset direction for lifting by crane the cantilever crane of the asymmetric thing of the structure so that the lifting center of gravity line of the cantilever crane overlaps with identified geometric center of gravity line；(3) special hanger for lifting by crane the asymmetric thing of the structure hung along the cantilever crane lifting center of gravity line is provided so that the structure asymmetric thing keeps balance when lifting by crane；(4) special hanger is fixedly connected with the asymmetric thing of the structure, then carries out lifting operation so that the structure asymmetric thing keeps balance when lifting by crane.
Description
Technical field
The present invention relates to construction of road and bridge field, more particularly to a kind of asymmetric thing of structure hoisting method.
Background technology
On the premise of assuming that object is homogeneous, the object center of gravity or center of gravity line are only relevant with its shape, for regular
The object of shape, its geometric center lines and center of gravity line are to overlap；For object in irregular shape, the center of gravity line of the object can
Obtained with by calculating or experimental technique, while being also the several of the object in irregular shape by calculating the position of the center of gravity for obtaining
What center and mass centre.On the premise of the object is heterogeneous, the geometric center (line) and actual center gravity (line) of the object
And it is misaligned.
It is approximate regulation and symmetrical for the contour shape on its surface of the building element of part preassembling, but inside it
Structure is simultaneously asymmetric, and this building element is physically not to be regarded as homogeneous body, determines the asymmetric building of this class formation
The position relationship of the center of gravity of component to the hoisting construction quality of the building element, apply by the lifting simultaneously for this building element
Work also need to ensure lifting process it is steady, otherwise the building element may because of during lifting occur inclination or wave
And have a negative impact to the structure of the building element.
For example, the steel box-girder I of cable-stayed bridge as shown in Figure 1 or suspension bridge bridge floor, the steel box-girder I is by top board, skew web plate, bottom
Plate constitutes its surface profile structure, and said structure is uniform in the surface distributed of steel box-girder I, therefore the surface profile of steel box-girder I has
There are geometric center lines I 1；But be provided in the diaphragm plate I 3 inside steel box-girder I probably due to construction requirement along bridge to direction
Mal-distribution is carried out on (the assembled direction for extending of bridge floor), the species of the diaphragm plate I 3 being mainly shown as used in it may
Inconsistent (but the diaphragm plate I 3 is symmetrical on direction across bridge direction), therefore, the arrangement of the diaphragm plate I 3 have impact on this
The position of the actual center gravity line I 2 of steel box-girder I.In this case, the geometric center lines I 1 and actual center gravity line I 2 are not weighed
Close.
Existing suspender II as shown in Figure 2 has symmetrical structure, and it includes the basis branch being symmetrically extended in the lateral direction
Frame II 1, the drawing lifting hole(eyelet) II 2 being opened in the geometric center lines II 4 of the base rack II 1 and with the geometric center lines II
4 hangers II 3 for being symmetricly set on the lower section of the base rack II 1.
As shown in figure 3, when lifting by crane the steel box-girder I using the suspender II, due to hoisting construction standard requirement suspender II
Geometric center lines II 4 to be overlapped with the geometric center lines I 1 of steel box-girder I, therefore when being lifted by crane according to the construction reference,
The steel box-girder I will occur larger inclination in lifting process, have impact on the structural stability of the steel box-girder I.
There are two kinds of asymmetric suspenders for being applied to lift by crane the asymmetric object of foregoing structure at present：
First, the asymmetric suspender III of triangle as shown in Figure 4, the asymmetric suspender III of the triangle coordinates screw mandrel to adjust can
It is easier to realize that lifting center of gravity is shifted, and because its construction features can more effectively play steel Anti-pull-press strength characteristics, structure
Clearly, Force Calculation is convenient for stress, and bar cross section can as far as possible reduce and further reduce structure material.But its shortcoming is also relatively dashed forward
Go out, because to obtain rational loading angle, its brace angle is usually not less than 45 °, therefore the overall work of suspender III is high
Degree is larger, and work head room is required, therefore can only be used cooperatively with the cantilever crane IV of part model；
Second, the adjustable suspender of carrying pole type hydraulic pressure, its cardinal principle be using steel bending resistance tension it is preferable the characteristics of, it is and normal
The shoulder pole girder of rule is identical, meets required work load by selecting different sections, then coordinate and can change by mobile
The hydraulic pressure bending moment system of lifting center of gravity position, realizes that center of gravity is shifted；Suspender working depth that the carrying pole type hydraulic pressure is adjustable requirement is low, can
The lifting of asymmetric steel box-girder (or other building elements) is realized easily, but, due to the introducing of hydraulic system, its construction becomes
Complexity, increases the cost of the suspender and the later maintenance cost of overhaul, also, the adjustable extent of the hydraulic pressure bending moment system has
Limit, anchor points are immutable, cannot then be used when steel box-girder hoisting point position changes.
The content of the invention
It is more flexible it is an object of the present invention to provide a kind of scope of application, it is easy to accomplish, lower-cost structure is asymmetric
The hoisting method of thing, and the hoisting method application process.
To reach above technical purpose, the technical solution adopted by the present invention is as follows：
A kind of hoisting method of the asymmetric thing of structure, it is comprised the following steps：
(1) position, the position of actual center gravity line and the reality of the geometric center lines for determining the asymmetric thing of structure are calculated
Offset direction of the border center of gravity line relative to the geometric center lines and offset distance；
(2) geometric center lines based on determined by are fixed in advance asymmetric for lifting by crane the structure on hoisting platform
The cantilever crane of thing moves the offset distance along the offset direction so that the lifting center of gravity line of the cantilever crane and institute
The geometric center of gravity line of determination overlaps；
(3) special hanger for lifting by crane the asymmetric thing of the structure hung along the cantilever crane lifting center of gravity line is provided
So that the structure asymmetric thing keeps balance when lifting by crane；
(4) special hanger is fixedly connected with the asymmetric thing of the structure, then carries out lifting operation so that
The structure asymmetric thing keeps balance when lifting by crane.
Specifically, in step (1), the position of the actual center gravity line of the asymmetric thing of structure is counted according to below equation
Calculate：
Wherein, miIt is the weight of the asymmetric thing each several part of the structure, liIt is the asymmetric thing each several part difference base of the structure
In a distance for the default plane of reference, m is the gross weight of the asymmetric thing of the structure, and X is the actual heavy of the asymmetric thing of the structure
Heart line to the plane of reference distance.
Further, the asymmetric thing of the structure includes the part relative to default symmetry axis/face with symmetrical structure
With the part without symmetrical structure, the position of the actual center gravity line of the asymmetric thing of the structure is calculated according to below equation：
Wherein, m1iIt is the weight of each several part relative to the symmetry axis/face in the asymmetric thing of the structure with symmetrical structure
Amount, L is the total length of the asymmetric thing of the structure, m2iIt is right not have relative to the symmetry axis/face in the asymmetric thing of the structure
Claim the weight of each several part of structure, liNot have symmetrical structure relative to the symmetry axis/face in the asymmetric thing of the structure
Each several part respectively with the distance of the plane of reference, m is the gross weight of the asymmetric thing of the structure, and X is the reality of the asymmetric thing of the structure
Border center of gravity line to the plane of reference distance.
In step (1), the structure is not right according to the computational methods of the position of the asymmetric thing geometric center lines of structure
The outer contour shape of thing is claimed to calculate the geometric center lines.
Preferably, the cantilever crane is provided for strengthening fixed fixed reinforcement with the hoisting platform after moving integrally
Device.
Specifically, the fixed stiffening device is the anchoring reinforcement structure and/or setting being arranged on the cantilever crane
Load-bearing reinforcement structure on the hoisting platform.
To realize the present invention, the special hanger includes hoisting bracket and several hanging below the hoisting bracket
Ear；In step (3), the geometric center lines weight of the geometric center lines of the hanger of the special hanger and the asymmetric thing of the structure
Close, the hoisting bracket includes base rack and increases for balancing the structure during lifting not on the base rack
The additional body of counterpart.
Structure on the suspender：The base rack has symmetrical structure, and the additional body increases in the original
The side of hoisting bracket.
Further, the suspender is outstanding with described by being opened in the drawing lifting hole(eyelet) in the base rack geometric center lines
Arm loop wheel machine is hung.
Compared with prior art, the present invention has following advantage：
(1) hoisting method of the asymmetric thing of structure of the invention, for the position of the actual center gravity line of the asymmetric thing of structure
Computational methods it is simple and feasible, accurate positioning can quick quality and the distribution situation meter of quality according to the asymmetric thing of the structure
Calculate the position of actual center gravity line；
(2) hoisting method of the asymmetric thing of structure of the invention, using the rising cantilever crane of the suspender through overweight processing
The geometric center lines of the actual center gravity line and the asymmetric thing of structure that hang the asymmetric thing of center of gravity line, structure are coordinated, and can make this
The asymmetric thing of structure keeps balance in lifting process, it is to avoid run-off the straight is waved；
(3) hoisting method of the asymmetric thing of structure of the invention, devises special hanger, can be according to practice of construction needs
From various cantilever cranes, the limitation to the species of selected cantilever crane is reduced；
(4) hoisting method of the asymmetric thing of structure of the invention, after the position of the lifting center of gravity line of cantilever crane changes,
The cantilever crane is increased and strengthens fixed fixed stiffening device with hoisting platform, be conducive to the steadiness of cantilever crane；
(5) hoisting method of the asymmetric thing of structure of the invention, enters according to the practical structures for being played hanging object to the suspender
Row is targetedly processed again, not only to lifting scene targetedly, also reduces the production cost of suspender.
Brief description of the drawings
Fig. 1 is standard sections steel box-girder dividing plate distribution schematic diagram.
Fig. 2 is the suspender of existing symmetrical configuration.
Fig. 3 is view when steel box-girder is lifted by crane using the suspender of the symmetrical configuration shown in Fig. 2.
Fig. 4 is the asymmetric suspender of existing triangle and its use state schematic diagram.
The cantilever crane and the working condition of suspender that Fig. 5 is used by the hoisting method of the asymmetric thing of structure of the invention show
It is intended to.
Fig. 6 is the enlarged diagram of α parts in Fig. 5.
Fig. 7 is the enlarged diagram of beat portion in Fig. 5.
The structural representation of the suspender that Fig. 8 is used by the hoisting method of the asymmetric thing of structure of the invention.
Fig. 9 is the front view of the first additional body in Fig. 8.
Figure 10 is the view in the A-A directions of Fig. 9.
Figure 11 is the view in the B-B directions of Fig. 9.
Figure 12 is view of the hoisting method of the asymmetric thing of structure of the invention when steel box-girder is lifted by crane.
Specific embodiment
The present invention is described in further detail below in conjunction with the drawings and specific embodiments.
The present embodiment for as a example by the standard steel box-girder of assembled cable-stayed bridge or suspension bridge bridge floor, to structure of the invention
The hoisting method of asymmetric thing is described in detail.The size of a steel box-girder for standard I as shown in Figure 1 is as follows：The steel case
The center of beam I 3.54m high, 12m long, top board thickness 16mm and 32mm (at anchor tie plate), skew web plate thickness 12mm, base plate thickness 12mm and
16mm, the top board and base plate are put more energy into using U-shaped rib closure, top board U-shaped rib thickness 8mm, base plate U-shaped rib thickness 6mm.
Herein it should be noted that because the steel box-girder I needs to be carried out to direction (i.e. above-below direction in Fig. 1) along along bridge
Splicing extension, in order to ensure that described each steel box-girder I does not have a down dip or face upward along bridge on direction, pays the utmost attention to horizontal stroke
Bridge is to the axis or the plane of reference of direction (i.e. left and right directions in Fig. 1) as the geometric center lines I 1 of the steel box-girder I for guarantor
Card lifting balance, therefore, hereinafter involved " symmetrical " and " asymmetric " is all based on parallel to the direction across bridge direction
Geometric center lines I 1.
The hoisting method of the steel box-girder I is comprised the following steps：
(1) calculating of geometric center lines and actual center gravity line.
The position of the actual center gravity line of the asymmetric thing of structure can be obtained by assembly center of gravity calculation method, specifically root
Calculated according to below equation：
In formula (1), miIt is the weight of the asymmetric thing each several part of the structure, liIt is the asymmetric thing each several part of the structure point
Not Ji Yu a distance for the default plane of reference, m is the gross weight of the asymmetric thing of the structure, and X is the reality of the asymmetric thing of the structure
Border center of gravity line to the plane of reference distance.
Further, for the steel box-girder I described in the present embodiment, due to its constitute surface profile structure part have it is several
What center line I 1, therefore, the computing formula for the actual center gravity line of the steel box-girder I can be deduced and be：
In formula (2), m1iIt is each portion relative to its default symmetry axis/face in the asymmetric thing of the structure with symmetrical structure
The weight divided, L is the total length of the asymmetric thing of the structure, m2iFor in the asymmetric thing of the structure relative to the symmetry axis/face not
The weight of each several part with symmetrical structure, liIt is symmetrical not have relative to the symmetry axis/face in the asymmetric thing of the structure
The each several part of structure respectively with the distance of the plane of reference, m is the gross weight of the asymmetric thing of the structure, and X is that the structure is asymmetric
The actual center gravity line of thing to the plane of reference distance.
With reference to Fig. 1 and Fig. 3, according to the structure composition previously with regard to the steel box-girder I, the several of the steel box-girder I are calculated respectively
The position of what center line I 1, the position of actual center gravity line I 2 and the actual center gravity line I 2 are produced relative to the geometric center lines
Raw offset direction and offset distance D.
Calculated according to the shape of the outline of the steel box-girder I for the position of the geometric center lines I 1 of the steel box-girder I and obtained
.
Calculated by the formula (2) for the actual center gravity line I 2 of the steel box-girder I and obtained, specifically, with the steel box-girder I
Back of the body tower side end face to calculate the plane of reference, the position of the actual center gravity line I 2 of the steel box-girder I is calculated according to the following formula：
(mTop, base plate+mU-shaped ribbing+mLongitudinal baffle+mFlange plate ribbed stiffener+……)×L/2+[mDiaphragm plate H1×(l1+l2+l3)+mDiaphragm plate H2×l4]=
mSteel box-girder gross weightX,
Wherein, L is the length of steel box-girder I described in single-unit in formula, and X is the actual center gravity line of the steel box-girder I to calculating reference
The distance in face；Further, " mTop, base plate+mU-shaped ribbing+mLongitudinal baffle+mFlange plate ribbed stiffener+ ... " in the steel box-girder I relative to the reference
Face has the total amount and " m of symmetrical structure partDiaphragm plate H1”“mDiaphragm plate H2" be respectively in the steel box-girder I relative to the plane of reference not
Weight with symmetrical structure part, " l1、l2、l3、l4" be respectively it is above-mentioned without geometrically symmetric structure division relative to described
The distance of the plane of reference, " mSteel box-girder gross weight" be the steel box-girder I gross weight.
Thus, the offset distance D=L/2-X.Herein define bridge extending direction for front (i.e. right side in Fig. 3,
Left side is rear), and be to calculate the plane of reference with the front end of the steel box-girder I, if the result of calculation of D is on the occasion of showing the steel case
Forward end offset distance D (as shown in Figure 3) of actual center gravity line I 2 of beam I, if the result of calculation of D is negative value, shows the steel box-girder I
The rear end offset distance D of actual center gravity line I 2.
(2) mobile cantilever crane 1.
Hoisting construction requirement lifting center of gravity line must overlap with the center of gravity line for being played hanging object, therefore, with reference to Fig. 5, will be based on
The geometric center lines I 1 of the steel box-girder I are fixed on the cantilever crane 1 completed on the assembled a of steel box-girder I and I b described in advance
Moved integrally on offset direction, so that the lifting center of gravity line 1a of the cantilever crane 1 is mobile described on the offset direction
Offset distance D, makes the lifting center of gravity line 1a be overlapped with the actual center gravity line I 2 of steel box-girder I.
With continued reference to Fig. 5, the cantilever crane 1 include pole bracket 11, be erected on the pole bracket 11 for leading
The lifting system 12 of drawing, the leg system 13 for being arranged on the bottom of the pole bracket 11 and it is arranged under the leg system 13
The running gear 14 of side.
In the present embodiment, the pole bracket 11 is Diamond-Shape Form Traveler support, and the pole bracket 11 includes that head and the tail connect successively
It is the upper longeron 111 of rhombus, strut 114, lower longeron 112 and pull bar 113, also including being vertically arranged in the He of upper longeron 111
Column 115 between lower longeron 112.
Further, the lifting system 12 includes hoist engine 121, the fixed pulley being arranged on the pole bracket 11
122 and drawn from the hoist engine 121 and lifting rope 123 by the fixed pulley 122, the lifting rope 123 is further
Drawn downwards from the front end of the upper longeron 111, for being connected with suspender described later 2, for lifting by crane the c of steel box-girder I to be spliced.
Further, the leg system 13 includes being separately positioned on the He of front leg strut 131 of the front end of lower longeron 112
It is arranged on the rear support leg 132 of the rear end of lower longeron 112.The running gear 14 includes being anchored at a of steel box-girder I for having poured
With the walking track 141 on I b and pulling device (not shown).
With reference to Fig. 5~7, when the cantilever crane 1 is initially fixed on a of the steel box-girder I and I b, the He of the front leg strut 131
Rear support leg 132 is all supported below the fulcrum on walking track 141 by the diaphragm plate I 3 of steel box-girder I, however, working as the cantilever crane
After machine 1 is moved, the front leg strut 131 and rear support leg 132 are likely to no longer obtain the support of the diaphragm plate I 3, thus
It is likely to result in the reaction of supports excessive, also easily causes the top board of steel box-girder I part by lateral deflection, therefore, in order to improve the cantilever crane 1
Fixed safety coefficient is, it is necessary to set following stiffening device：
1) load-bearing stiffening device 142.As shown in fig. 6, the load-bearing stiffening device 142 is arranged in the running gear 14
Leant place with the front leg strut 131.The load-bearing stiffening device 142 includes being arranged on the horizontal stroke on walking track 141 surface
Reinforcements steel plate 1421 across the top of adjacent two diaphragm plates I 3, the top of diaphragm plate I 3 for being arranged on front end adding with described
The split heads 1422 of the strong fixed installation of steel plate 1421 and the sleeper 1423 being supported between the steel box-girder I and walking track 141.
The counter-force of the front leg strut 131 is assigned to adjacent two in the lower section of front leg strut 131 by the load-bearing stiffening device 142
On individual diaphragm plate I 3, it is to avoid the top board of the steel box-girder I of the lower section of the front leg strut 131 deforms because local counter-force is excessive, has
Effect improves the security when cantilever crane 1 is fixed.
2) stiffening device 116 is anchored afterwards.With reference to Fig. 7, the rear anchoring stiffening device 116 is arranged on the pole bracket 11
Rear, and supported by the rear support leg 132.In the present embodiment, the forward end of the cantilever crane 1 moves the offset distance D
Afterwards, the position of rear anchor originally is not moved with the movement of the cantilever crane 1, but, to coordinate the outstanding of the reach
Arm support 11, it is necessary to anchor stiffening device 116 after being to the original rear anchor transformation of the way, it is described after anchoring stiffening device 116
Including being undertaken on the extension beam 1161 of the rear end of lower longeron 112, being pressed on the rear anchor beam 1163 of the top of extension beam 1161
And through the rear anchor beam 1163 until anchor pole 1162 that is described extending beam 1161 and being anchored.Preferably, it is full
Sufficient stress intensity requirement, the extension beam 1161 is designed as steel box-shaped formula.
(3) special suspender 2 is manufactured.
During hoisting construction, also require that the geometric center lines of suspender overlap with the geometric center lines for being played hanging object, to enter
One step ensures that lifting is steady.But deposited between the geometric center lines I 1 of the steel box-girder I and actual center gravity line I 2 due to being lifted by crane
In skew, therefore, with reference to Fig. 8, it is necessary to redesign the structures different from the original suspender II with symmetrical structure asymmetric
Suspender 2, the suspender 2 include hoisting bracket 2A and several be fixed on hanger 24 below hoisting bracket 2A.
Specifically, the hoisting bracket 2A is made steel case structure by steel plate, and hoisting bracket 2A includes symmetrical configuration
Base rack 21 and the additional body 22 being arranged on the base rack 21, wherein, the base rack 21 is in the lateral direction
It is symmetrically extended, in the base rack 21 along being offered for the lifting rope with the cantilever crane 1 in the geometric center lines of itself
The drawing lifting hole(eyelet) 23 of 123 connections.With reference to Fig. 8~11, the additional body 22 is similarly steel case structure, in the present embodiment, should
Additional body 22 is connected to the left side of the base rack 21, and the additional body 22 is prolonged from the top of the left-half of base rack 21
Outside the edge in the left side for reaching the base rack 21, the effect of the additional body 22 is：First, increasing the base rack
21 left side, the fixed position for lengthening is provided to set the hanger 24, second, the additional body 22 pairs suspender 2 is entering
Play a part of counterpoise during row hoisting construction.
Those skilled in the art know, the structure of the additional body 22, quantity and link position can be according to actually applying
Work handling situations and be adjusted, be not limited to the structure shown in the present embodiment.For example, the additional body 22 can be connected to institute
State the right side of base rack 21；The additional body 22 can also simultaneously be connected to the left side and right side of the base rack 21,
But the structure for being connected to the additional body 22 in left side is different from the structure of the additional body 22 for being connected to right side.
Further, the hanger 24 includes being fixed on the basic hanger being arranged symmetrically of the lower section of the base rack 21
241st, it is fixed on the transformation of the way hanger 242 of the lower section optional position of the base rack 21 and is fixed on the lower section of the additional body 22
Additional hanger 243.The basic hanger 241 can be arranged in pairs, it is also possible to be used according to practice of construction handling situations any one
It is individual.As shown in figure 8, the transformation of the way hanger 242 includes being fixed on the transformation of the way otic placode 2421 of the lower section of the base rack 21 and opens
Be located at transformation of the way otic placode 2421 lower end and it is exposed at hanging circle 2422 below the base rack；The transformation of the way otic placode
2421 run through the base vertically by being opened in the welding groove (not shown) of the upper and lower surface of the base rack 21 respectively
Plinth support 21, and be welded and fixed using the welding groove.As shown in Fig. 9~11, the additional hanger 243 includes vertical
Through the additional body 22 and the additional otic placode 2431 that is fixedly connected with the additional body 22, and it is opened in described additional
The lower end of otic placode 2431 and be exposed at the lower section of the additional body 22 hang circle 2432.
Preferably, the circle that hangs of the basic hanger 241, transformation of the way hanger 242 and additional hanger 243 is both provided with stiffening ring.
It is highly preferred that the basic hanger 241, the transformation of the way hanger 242 and the flush arrangement of additional hanger 243.
The geometric center lines between at least two in the basic hanger 241, transformation of the way hanger 242 and additional hanger 243
Must be overlapped with the geometric center lines I 1 of the steel box-girder I, further, the basic hanger 241, transformation of the way hanger 242 and attached
Plus the geometric center lines between at least two in hanger 243 are misaligned with the geometric center lines of the base rack 21, so that
Ensure that the suspender 2 has the dissymmetrical structure for meeting practice of construction requirement.
(4) assemble tackling system and lifted by crane.
As shown in figure 5, with the cantilever crane 1 and the composition tackling system of suspender 2, the suspender 2 is passed through into the hanger
24 are fixedly connected with the steel box-girder I, by the suspender 2 by the drawing lifting hole(eyelet) 23 and the cantilever by movement
Loop wheel machine 1 is fixedly connected.Now, as shown in figure 12, the reality of the lifting center of gravity line 1a of the cantilever crane 1 and steel box-girder I
Center of gravity line I 2 overlaps, and, using the transformation of the way hanger 242 on the additional hanger 243 in left side and right side as work hanger, this two for the suspender 2
The geometric center lines 2a of individual hanger overlaps with the geometric center lines I 1 of steel box-girder I.Checking the connection safety of the tackling system
Lifting operation is carried out after property.
In sum, the hoisting method of the asymmetric thing of structure of the present invention is applied widely, it is easy to accomplish, suspender processing cost
It is relatively low.
Above-described embodiment is the present invention preferably implementation method, but is not merely restricted to the described embodiments, other
It is any without departing from Spirit Essence of the invention and the change, modification, replacement made under principle, combine, simplify, should be equivalent
Substitute mode, is all contained within protection scope of the present invention.
Claims (8)
1. the hoisting method of the asymmetric thing of a kind of structure, it is characterised in that it is comprised the following steps：
(1) position, the position of actual center gravity line and the actual weight of the geometric center lines for determining the asymmetric thing of structure are calculated
Offset direction of the heart line relative to the geometric center lines and offset distance；
(2) by the geometric center lines based on determined by be fixed in advance on hoisting platform for lifting by crane the asymmetric thing of the structure
Cantilever crane moves the offset distance along the offset direction so that the lifting center of gravity line of the cantilever crane with determined
Actual center gravity line overlap；
(3) provide along the cantilever crane lifting center of gravity line hang for lift by crane the special hanger of the asymmetric thing of the structure with
Balance is kept when lifting by crane the asymmetric thing of the structure；
(4) special hanger is fixedly connected with the asymmetric thing of the structure, then carries out lifting operation so that described
Structure asymmetric thing keeps balance when lifting by crane；
The special hanger includes hoisting bracket and several hangers below the hoisting bracket；The hoisting bracket includes
Base rack and increase the additional body for balancing the asymmetric thing of the structure during lifting on the base rack；Institute
Stating hanger includes being fixed on the basic hanger being arranged symmetrically of the base rack decentralization, is fixed on the base rack lower section times
The transformation of the way hanger of meaning position and the additional hanger for being fixed on the additional body decentralization；In step (3), the basic hanger, change
The geometric center lines weight of geometric center lines between at least two in hanger processed and additional hanger and the asymmetric thing of the structure
Close.
2. the hoisting method of the asymmetric thing of structure as claimed in claim 1, it is characterised in that：In step (1), the structure is not
The position of the actual center gravity line of counterpart is calculated according to below equation：
Wherein, miIt is the weight of the asymmetric thing each several part of the structure, liFor the asymmetric thing each several part of the structure is based respectively on one
The distance of the individual default plane of reference, m is the gross weight of the asymmetric thing of the structure, and X is the actual center gravity line of the asymmetric thing of the structure
To the distance of the plane of reference.
3. the hoisting method of the asymmetric thing of structure as claimed in claim 2, it is characterised in that：The asymmetric thing of structure includes
Relative to part and part without symmetrical structure that default symmetry axis/face has symmetrical structure, the asymmetric thing of the structure
The position of actual center gravity line calculated according to below equation：
Wherein, m1iIt is the weight of each several part relative to the symmetry axis/face in the asymmetric thing of the structure with symmetrical structure, L
It is the total length of the asymmetric thing of the structure, m2iNot have symmetrical junction relative to the symmetry axis/face in the asymmetric thing of the structure
The weight of each several part of structure, liIt is each portion for not having symmetrical structure in the asymmetric thing of the structure relative to the symmetry axis/face
Point respectively with the distance of the plane of reference, m is the gross weight of the asymmetric thing of the structure, and X is the actual heavy of the asymmetric thing of the structure
Heart line to the plane of reference distance.
4. the hoisting method of the asymmetric thing of structure as claimed in claim 1, it is characterised in that：In step (1), the structure is not
The outer contour shape of the asymmetric thing of the structure calculates described several according to the computational methods of the position of the geometric center lines of counterpart
What center line.
5. the hoisting method of the asymmetric thing of structure as claimed in claim 1, it is characterised in that：The cantilever crane is moved integrally
It is provided for strengthening fixed fixed stiffening device with the hoisting platform afterwards.
6. the hoisting method of the asymmetric thing of structure as claimed in claim 5, it is characterised in that：The fixed stiffening device is to set
Put the anchoring reinforcement structure on the cantilever crane and/or the load-bearing reinforcement structure being arranged on the hoisting platform.
7. the hoisting method of the asymmetric thing of structure as claimed in claim 1, it is characterised in that：The base rack has symmetrical
Structure, the additional body increases in the side of the base rack.
8. the hoisting method of the asymmetric thing of structure as claimed in claim 7, it is characterised in that：The special hanger is by opening up
Drawing lifting hole(eyelet) in the base rack geometric center lines is hung with the cantilever crane.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103964309A (en) * | 2014-05-09 | 2014-08-06 | 山东电力建设第二工程公司 | Mounting method of duplex low-pressure heater |
| CN203865822U (en) * | 2014-05-05 | 2014-10-08 | 青岛海西重工有限责任公司 | Large-scale crankshaft horizontal lifting appliance |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2782325B2 (en) * | 1994-09-01 | 1998-07-30 | 日揮株式会社 | Balance structure and method of transferring long object using the same |
| JPH09118492A (en) * | 1995-10-24 | 1997-05-06 | Babcock Hitachi Kk | Automatic aligning hoisting accessory |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203865822U (en) * | 2014-05-05 | 2014-10-08 | 青岛海西重工有限责任公司 | Large-scale crankshaft horizontal lifting appliance |
| CN103964309A (en) * | 2014-05-09 | 2014-08-06 | 山东电力建设第二工程公司 | Mounting method of duplex low-pressure heater |
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Inventor after: Zhang Hailong Inventor after: Yu Li Inventor after: Zhou Qiong Inventor after: Zhang Zheng Inventor after: Ge Jiping Inventor after: Liu Huaigang Inventor after: Xiao Xiangrong Inventor after: Chen Xiangjun Inventor after: Liang Yuepeng Inventor after: Gao Shiqiang Inventor after: Tan Xinghua Inventor after: Hu Jianfeng Inventor after: Yang Jie Inventor before: Xiao Xiangrong Inventor before: Zhou Qiong Inventor before: Zhang Zheng Inventor before: Ge Jiping Inventor before: Chen Xiangjun Inventor before: Liang Yuepeng Inventor before: Gao Shiqiang Inventor before: Liu Huaigang Inventor before: Tan Xinghua Inventor before: Hu Jianfeng Inventor before: Yang Jie Inventor before: Yu Li |
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