CN106193618B - A kind of aerial steel structure truss construction of Long span - Google Patents
A kind of aerial steel structure truss construction of Long span Download PDFInfo
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- CN106193618B CN106193618B CN201610557954.1A CN201610557954A CN106193618B CN 106193618 B CN106193618 B CN 106193618B CN 201610557954 A CN201610557954 A CN 201610557954A CN 106193618 B CN106193618 B CN 106193618B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
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Abstract
The invention discloses a kind of aerial steel structure truss construction of Long span, comprise the steps of：Preparative work before construction；Step 1：Preparation before construction；Step 2：Lift each section of pre-buried steel spinous process of the seventh cervical vertebra, pre-buried girder steel；Step 3：The installation of hanging device；Step 4：Live steel truss lifting;Compared with prior art, it is an object of the invention to provide a kind of aerial steel structure truss construction of Long span, it can solve in steel structure truss lifting, lifting operation face is smaller, setting height(from bottom) is excessive, it is excessive to lift weight, lifting radius is excessive, the extreme influence caused by construction period, construction cost and safety.
Description
Technical field
The present invention relates to steel structure truss technical field of construction, is a kind of aerial steel structure truss of Long span specifically
Construction.
Background technology
During steel structure truss installation, generally use construction is with crane lifting or the assembly of Support Method single-piece come complete
Into, but for hoisting height is high, lifting weight is heavy, lifting radius is big, large tonnage crane, such project cost can only be selected
Height, the control to construction cost cause strong influence, basic using crane lifting especially for site operation narrow field
It can not achieve；During with construction with brackets, the intensity of top surface can not be met the requirements, and setting height(from bottom) is higher, and construction is more complicated；Such one
Come, seriously affect the control for site operation duration, cost, construction safety, great inconvenience is brought to construction.
The content of the invention
It is an object of the invention to provide a kind of aerial steel structure truss construction of Long span, can solve in steel construction
In truss hoisting process, since on-site hoisting work surface is smaller, setting height(from bottom) is excessive, and lifting weight is excessive, and lifting radius is excessive,
The extreme influence caused by construction period, construction cost and safety.
The present invention is achieved through the following technical solutions：A kind of aerial steel structure truss construction of Long span, comprising following
Step：
Step 1：Preparation before construction；
Step 2：Lift each section of pre-buried steel spinous process of the seventh cervical vertebra, pre-buried girder steel；
Step 3：The installation of hanging device, specifically includes following steps；
Step 31：Two hoist engines are separately mounted in the floor plates of two main building tops；
Step 32：Sub-truss is placed on by the bracket for stretching out building body using top gooseneck as supporting point during lifting
It is welded and fixed on bracket；
Step 33：Cantilever frame is weldingly fixed on sub-truss, drag-line is hung in floor on pre-buried steel column；
Step 34：Lifting truss welding is fixed on cantilever frame；
Step 35：Pulley blocks are fixedly mounted on lifting truss；
Step 4：Live steel truss lifting, specifically includes following steps；
Step 41：Preparation before steel truss lifting；
Step 42：Steel truss is erected, while starts hoist engine and slings steel truss；
Step 43：After steel truss rises and is raised to pre-determined bit, steel truss is hung with jack, mobile jack is in place by steel truss；
Step 44：Steel truss is welded, removes jack, installation is complete for steel truss；
Step 45：Repeat above steel truss hoisting to make, complete all monolithic steel truss installations, remove hanging device；
Step 46：Steel secondary beam, lifting steel column, the steel diagonal brace column of interface position and composite floor of mating formation are lifted successively,
Complete Steel Structure Installation.
Further, the aerial steel structure truss construction of a kind of Long span according to claim 1, the step
One specifically includes following steps：
Step 11：By sectional making complete structural features transport to construction site platform for lining, according to code requirement into
Row is checked and accepted, and structural features are assembled into monolithic truss after qualification；The platform for lining, which is arranged on, to be needed to install steel truss floor
On intermediate floor；The platform for lining is installed on the platform buttress on girder；The platform buttress is arranged on every 3-5 meters
On girder；The platform buttress upper surface is on same level absolute altitude；
Step 12：The monolithic steel truss that assembly is completed is transported to below lifting point by sliding rail；
Step 13：Hanging device is installed required material to be transported to below tower crane；
Step 14：The girder axis of lifting segment and length control line are carried out into mark.
Further, the aerial steel structure truss construction of a kind of Long span according to claim 1, the step
Two specifically refer to before the pre-buried steel spinous process of the seventh cervical vertebra, pre-buried steel beam lifting is carried out, and first do the orientation axis of steel column bone and absolute altitude datum line
Go out, while weld interim positioning plate as needed on the inside of flange plate；Then the two-way vertical of theodolite control steel column bone is utilized
Spend, while the precision of steel column locations is examined with measuring tape, carry out steel column bone installation；After completing the installation of steel column bone, pre-buried girder steel is lifted.
Further, the aerial steel structure truss construction of a kind of Long span according to claim 1, the step
Bracket protruded length in 32 is the safety value calculated according to live practical structures；The bracket protruded length deficiency safety value
When, bracket lengthening must be carried out；When carrying out lengthening section bracket, the axis of exposed bracket, absolute altitude are measured first and carry out mark, together
When the scaffolding pole around bracket is removed temporarily, and to scaffold carry out consolidation process, finally lifting when tower crane
Sling, support using exposed bracket and building body scaffold and make splicing operation platform with angle steel plank, with positioning plate, square, straight
Ruler is welded lengthening section according to the measuring line made in place.
Further, the aerial steel structure truss construction of a kind of Long span according to claim 1, the step
33 specifically refer to before cantilever frame is sling, and drag-line steel wire is first hung up, and after hanging installation site, drag-line is hung in floor
On pre-buried steel column, adjust after drag-line and cantilever frame meet the requirements and be welded and fixed.
Further, the aerial steel structure truss construction of a kind of Long span according to claim 1, the step
Steel truss in four uses from top to bottom symmetrically to be lifted with layer.
Further, the aerial steel structure truss construction of a kind of Long span according to claim 1, the step
41, specifically include following steps：
Step 411：Before live steel truss lifting is carried out, safe practice is carried out to Field Force and is told somebody what one's real intentions are；
Step 412：The working condition that structural features examine equipment is first hung before steel truss is lifted, the operation for drilling worker is ripe
White silk degree；
Step 413：Steel wire rope, hoist engine, jack are checked before lifting, checks the flexibility of spool turns, checks braking
Validity, check circuit it is whether safe and smooth；If finding undesirable project during the inspection process, must carry out immediately
Rectification, after rectification is qualified, into next process.
Further, the aerial steel structure truss construction of a kind of Long span according to claim 1, the step
42 specifically refer to when slinging steel truss, wait steel truss to stablize, and after not waving, rocking, two hoist engines of control are with same
Speed sync is run, and is promoted to pre-determined bit；The operating status of observation component in lifting process
Further, the aerial steel structure truss construction of a kind of Long span according to claim 1, the step
Rapid 43 specifically refer to described after steel truss is promoted to pre-determined bit, sling steel truss with jack, after waiting jack to entail much effort, do not unclamp
Hoist engine, makes steel truss be moved to installation position using jack；
Further, the aerial steel structure truss construction of a kind of Long span according to claim 1, the step
Rapid 44 specifically refer to the steel truss carries out size repetition measurement by the assembled weldering of steel truss using positioning plate, square, ruler in the air
Connect completion；The steel truss before being welded, welding job face underhung safety net and in safety net upper berth asbestos
Cloth.
Compared with prior art, the present invention haing the following advantages and beneficial effect：
（1）Present invention system can accelerate construction progress, improve work efficiency, save construction cost；
（2）The present invention is easy to operate, convenient；
（3）The present invention requires less, not influencing the construction of other work surfaces for Contraction in Site face.
Brief description of the drawings
Fig. 1 is the construction process schematic diagram of the present invention.
Embodiment
The present invention is described in further detail with reference to embodiment, but the implementation of the present invention is not limited to this.
Embodiment 1：
The aerial steel structure truss construction of a kind of Long span of the present embodiment, as shown in Figure 1, mainly passing through following skills
Art scheme is realized, is comprised the following steps：
Step 1：Preparation before construction；
Step 2：Lift each section of pre-buried steel spinous process of the seventh cervical vertebra, pre-buried girder steel；
Step 3：The installation of hanging device：
Step 31：Two hoist engines are separately mounted in two main building top floor plates；
Step 32：Sub-truss is placed on by the bracket for stretching out building body using top gooseneck as supporting point during lifting
It is welded and fixed on bracket；
Step 33：Cantilever frame is weldingly fixed on sub-truss, drag-line is hung in floor on pre-buried steel column；
Step 34：Lifting truss welding is fixed on cantilever frame；
Step 35：Pulley blocks are fixedly mounted on lifting truss；
Step 4：Live steel truss lifting, specifically includes following steps；
Step 41：Preparation before steel truss lifting；
Step 42：Steel truss is erected, while starts hoist engine and slings steel truss to pre-determined bit；
Step 43：After steel truss rises and is raised to pre-determined bit, steel truss is sling with jack, is moved to steel truss using jack
Installation position；
Step 44：Steel truss is welded, removes jack, installation is complete for steel truss；
Step 45：Repeat above steel truss hoisting to make, complete all monolithic steel truss installations, remove hanging device；
Step 46：Steel secondary beam, lifting steel column, the steel diagonal brace column of interface position and composite floor of mating formation are lifted successively,
Complete Steel Structure Installation.
The other parts of the present embodiment are same as the previously described embodiments, and so it will not be repeated.
Embodiment 2：
The present embodiment does further optimization on the basis of above-described embodiment, further, a kind of aerial steel knot of Long span
Structure truss construction engineering method, the step 1 specifically include following steps：
Step 11：By sectional making complete structural features transport to construction site platform for lining, according to code requirement into
Row is checked and accepted, and structural features are assembled into monolithic truss after qualification；The platform for lining, which is arranged on, to be needed to install steel truss floor
On intermediate floor；The platform for lining is installed on the platform buttress on girder；The platform buttress is arranged on every 3~5 meters
On girder；The platform buttress upper surface is on same level absolute altitude；
Step 12：The monolithic steel truss that assembly is completed is transported to below lifting point by sliding rail, the sliding rail
Road is connected with platform for lining and is connected with hoisting point position；
Step 13：Hanging device is installed required material to be transported to below tower crane；
Step 14：The girder axis of lifting segment and length control line are carried out into mark.
The other parts of the present embodiment are same as the previously described embodiments, and so it will not be repeated.
Embodiment 3：
The present embodiment does further optimization on the basis of above-described embodiment, further, a kind of aerial steel knot of Long span
Structure truss construction engineering method, comprises the following steps：
Step 1：Preparation before construction；
Step 11：By sectional making complete structural features transport to construction site platform for lining, according to code requirement into
Row is checked and accepted, and structural features are assembled into monolithic truss after qualification；The platform for lining, which is arranged on, to be needed to install steel truss floor
On intermediate floor；The platform for lining is installed on the platform buttress on girder；The platform buttress is arranged on every 3-5 meters
On girder；The platform buttress upper surface is on same level absolute altitude；
Step 12：The monolithic steel truss that assembly is completed is transported to below lifting point by sliding rail, the sliding rail
Road is connected with platform for lining and is connected with hoisting point position；
Step 13：Hanging device is installed required material to be transported to below tower crane；
Step 14：The girder axis of lifting segment and length control line are carried out into mark.
Step 2：Lift each section of pre-buried steel spinous process of the seventh cervical vertebra, pre-buried girder steel；It is described to specifically refer to carrying out the pre-buried steel spinous process of the seventh cervical vertebra, pre-buried
Before steel beam lifting, first the orientation axis of steel column bone and absolute altitude datum line are made, while is welded as needed on the inside of flange plate
Interim positioning plate；Then the two-way verticality of steel column bone is controlled using theodolite, while the precision of steel column locations is examined with measuring tape,
Carry out steel column bone installation；After completing the installation of steel column bone, pre-buried girder steel is lifted.
Step 3：The installation of hanging device：
Step 31：Two hoist engines are separately mounted in two main building top floor plates；
Step 32：Sub-truss is placed on by the bracket for stretching out building body using top gooseneck as supporting point during lifting
It is welded and fixed on bracket；The bracket protruded length is the safety value calculated according to live practical structures；The bracket is exposed
During curtailment safety value, bracket lengthening must be carried out；When carrying out lengthening section bracket, the axis of exposed bracket, absolute altitude are surveyed first
Go out and carry out mark, while the scaffolding pole around bracket is removed temporarily, and consolidation process is carried out to scaffold, finally
Sling in lifting with tower crane, support using exposed bracket and building body scaffold and make splicing operation platform with angle steel plank, with calmly
Position plate, square, ruler are welded lengthening section according to the measuring line made in place；
Step 33：Cantilever frame is weldingly fixed on sub-truss, drag-line is hung in floor on pre-buried steel column；
Step 34：Lifting truss welding is fixed on cantilever frame；
Step 35：Pulley blocks are fixedly mounted on lifting truss；
Step 4：Live steel truss lifting：
Step 41：Preparation before steel truss lifting；
Step 42：Steel truss is erected, while starts hoist engine and slings steel truss to pre-determined bit；
Step 43：After steel truss rises and is raised to pre-determined bit, steel truss is sling with jack, is moved to steel truss using jack
Installation position；
Step 44：Steel truss is welded, removes jack, installation is complete for steel truss；
Step 45：Repeat above steel truss hoisting to make, complete all monolithic steel truss installations, remove hanging device；
Step 46：Steel secondary beam, lifting steel column, the steel diagonal brace column of interface position and composite floor of mating formation are lifted successively,
Complete Steel Structure Installation.
The other parts of the present embodiment are same as the previously described embodiments, and so it will not be repeated.
Embodiment 4：
The present embodiment does further optimization on the basis of above-described embodiment, further, a kind of aerial steel knot of Long span
Structure truss construction engineering method, comprises the following steps：
Step 1：Preparation before construction；
Step 11：By sectional making complete structural features transport to construction site platform for lining, according to code requirement into
Row is checked and accepted, and structural features are assembled into monolithic truss after qualification；The platform for lining, which is arranged on, to be needed to install steel truss floor
On intermediate floor；The platform for lining is installed on the platform buttress on girder；The platform buttress is arranged on every 3~5 meters
On girder；The platform buttress upper surface is on same level absolute altitude；
Step 12：The monolithic steel truss that assembly is completed is transported to below lifting point by sliding rail, the sliding rail
Road is connected with platform for lining and is connected with hoisting point position；
Step 13：Hanging device is installed required material to be transported to below tower crane；
Step 14：The girder axis of lifting segment and length control line are carried out into mark.
Step 2：Lift each section of pre-buried steel spinous process of the seventh cervical vertebra, pre-buried girder steel；It is described to specifically refer to carrying out the pre-buried steel spinous process of the seventh cervical vertebra, pre-buried
Before steel beam lifting, first the orientation axis of steel column bone and absolute altitude datum line are made, while is welded as needed on the inside of flange plate
Interim positioning plate；Then the two-way verticality of steel column bone is controlled using theodolite, while the precision of steel column locations is examined with measuring tape,
Carry out steel column bone installation；After completing the installation of steel column bone, pre-buried girder steel is lifted.
Step 3：The installation of hanging device：
Step 31：Two hoist engines are separately mounted in two main building top floor plates；
Step 32：Sub-truss is placed on by the bracket for stretching out building body using top gooseneck as supporting point during lifting
It is welded and fixed on bracket；The bracket protruded length is the safety value calculated according to live practical structures；The bracket is exposed
During curtailment safety value, bracket lengthening must be carried out；When carrying out lengthening section bracket, the axis of exposed bracket, absolute altitude are surveyed first
Go out and carry out mark, while the scaffolding pole around bracket is removed temporarily, and consolidation process is carried out to scaffold, finally
Sling in lifting with tower crane, support using exposed bracket and building body scaffold and make splicing operation platform with angle steel plank, with calmly
Position plate, square, ruler are welded lengthening section according to the measuring line made in place；
Step 33：Cantilever frame is weldingly fixed on sub-truss, drag-line is hung in floor on pre-buried steel column；It is described
Specifically refer to before cantilever frame is sling, drag-line steel wire is first hung up, after hanging installation site, drag-line is hung over pre- in floor
Bury on steel column, adjust after drag-line and cantilever frame meet the requirements and be welded and fixed.
Step 34：Lifting truss welding is fixed on cantilever frame；
Step 35：Pulley blocks are fixedly mounted on lifting truss；
Step 4：Live steel truss lifting：
Step 41：Preparation before steel truss lifting；
Step 42：Steel truss is erected, while starts hoist engine and slings steel truss to pre-determined bit；
Step 43：After steel truss rises and is raised to pre-determined bit, steel truss is sling with jack, is moved to steel truss using jack
Installation position；
Step 44：Steel truss is welded, removes jack, installation is complete for steel truss；
Step 45：Repeat above steel truss hoisting to make, complete all monolithic steel truss installations, remove hanging device；
Step 46：Steel secondary beam, lifting steel column, the steel diagonal brace column of interface position and composite floor of mating formation are lifted successively,
Complete Steel Structure Installation.
The other parts of the present embodiment are same as the previously described embodiments, and so it will not be repeated.
Embodiment 5：
The present embodiment does further optimization on the basis of above-described embodiment, further, a kind of aerial steel knot of Long span
Structure truss construction engineering method, comprises the following steps：
Step 1：Preparation before construction；
Step 11：By sectional making complete structural features transport to construction site platform for lining, according to code requirement into
Row is checked and accepted, and structural features are assembled into monolithic truss after qualification；The platform for lining, which is arranged on, to be needed to install steel truss floor
On intermediate floor；The platform for lining is installed on the platform buttress on girder；The platform buttress is arranged on every 3~5 meters
On girder；The platform buttress upper surface is on same level absolute altitude；
Step 12：The monolithic steel truss that assembly is completed is transported to below lifting point by sliding rail, the sliding rail
Road is connected with platform for lining and is connected with hoisting point position；
Step 13：Hanging device is installed required material to be transported to below tower crane；
Step 14：The girder axis of lifting segment and length control line are carried out into mark.
Step 2：Lift each section of pre-buried steel spinous process of the seventh cervical vertebra, pre-buried girder steel；It is described to specifically refer to carrying out the pre-buried steel spinous process of the seventh cervical vertebra, pre-buried
Before steel beam lifting, first the orientation axis of steel column bone and absolute altitude datum line are made, while is welded as needed on the inside of flange plate
Interim positioning plate；Then the two-way verticality of steel column bone is controlled using theodolite, while the precision of steel column locations is examined with measuring tape,
Carry out steel column bone installation；After completing the installation of steel column bone, pre-buried girder steel is lifted.
Step 3：The installation of hanging device：
Step 31：Two hoist engines are separately mounted in two main building top floor plates；
Step 32：Sub-truss is placed on by the bracket for stretching out building body using top gooseneck as supporting point during lifting
It is welded and fixed on bracket；The bracket protruded length is the safety value calculated according to live practical structures；The bracket is exposed
During curtailment safety value, bracket lengthening must be carried out；When carrying out lengthening section bracket, the axis of exposed bracket, absolute altitude are surveyed first
Go out and carry out mark, while the scaffolding pole around bracket is removed temporarily, and consolidation process is carried out to scaffold, finally
Sling in lifting with tower crane, support using exposed bracket and building body scaffold and make splicing operation platform with angle steel plank, with calmly
Position plate, square, ruler are welded lengthening section according to the measuring line made in place；
Step 33：Cantilever frame is weldingly fixed on sub-truss, drag-line is hung in floor on pre-buried steel column；It is described
Specifically refer to before cantilever frame is sling, drag-line steel wire is first hung up, after hanging installation site, drag-line is hung over pre- in floor
Bury on steel column, adjust after drag-line and cantilever frame meet the requirements and be welded and fixed.
Step 34：Lifting truss welding is fixed on cantilever frame；
Step 35：Pulley blocks are fixedly mounted on lifting truss；
Step 4：Live steel truss lifting, the steel truss are used and from top to bottom symmetrically lifted with layer：
Step 41：Preparation before steel truss lifting, specifically comprises the steps of：
Step 411：Before live steel truss lifting is carried out, safe practice is carried out to Field Force and is told somebody what one's real intentions are；
Step 412：The working condition that structural features examine equipment is first hung before steel truss is lifted, the operation for drilling worker is ripe
White silk degree；
Step 413：Steel wire rope, hoist engine, jack are checked before lifting, checks the flexibility of spool turns, checks braking
Validity, check circuit it is whether safe and smooth；If finding undesirable project during the inspection process, must carry out immediately
Rectification, after rectification is qualified, into next process.
Step 42：Steel truss is erected, while starts hoist engine and slings steel truss to pre-determined bit；It is described to specifically refer to hanging
When playing steel truss, steel truss is waited to stablize, after not waving, rocking, two hoist engines of control are run simultaneously at a same speed, are carried
Rise to pre-determined bit；The operating status of observation component in lifting process
Step 43：After steel truss rises and is raised to pre-determined bit, steel truss is sling with jack, is moved to steel truss using jack
Installation position；Described in specifically referring to after steel truss is promoted to pre-determined bit, steel truss is sling with jack, after waiting jack to entail much effort,
Hoist engine is not unclamped, steel truss is moved to installation position using jack；
Step 44：Steel truss is welded, it is assembled to complete steel truss；The steel truss is specifically referred in the air using fixed
Position plate, square, ruler carry out size repetition measurement and complete the assembled welding of steel truss；It is described before being welded, in welding job
The underhung safety net in face and in safety net upper berth asbestos cloth, avoids in welding, spark and combustibles caused by welding
Contact, causes the appearance of fire incident.
Step 45：Repeat above steel truss hoisting to make, complete all monolithic steel truss installations, remove hanging device；
Step 46：Steel secondary beam, lifting steel column, the steel diagonal brace column of interface position and composite floor of mating formation are lifted successively,
Complete Steel Structure Installation.
The other parts of the present embodiment are same as the previously described embodiments, and so it will not be repeated.
Embodiment 6：
The present embodiment does further optimization on the basis of above-described embodiment, further, a kind of aerial steel knot of Long span
Structure truss construction engineering method, illustrates：
Aerial steel of the vestibule structural steelwork between Building A and Building B at absolute altitude 78.15m to 91.15m between two main buildings
Structure interface channel, i.e., in agent structure on the real abdomen i shaped steel truss of 25-29 layers of welding, steel truss underbeam axis spacing
3.1m, axis spacing 27.689m between Building A and Building B, lift monolithic truss length 23.5m, 16000 ㎏ of monolithic steel truss, lead to
Cross obtained by analysis to above-mentioned material, be separately mounted to A, on 28 floor plate of Building B using two 5 tons of low speed winch, consider building
Plate is relatively thin, and each hoist engine is fixed on the 20 ㎜ steel plates by 12 25 ㎜ round steel of Φ anchorings and is fixed with floor；With top
Supporting point when gooseneck stretches out the bracket of building body as lifting, sub-truss is placed on bracket and is welded and fixed, by calculating
Gained, live bracket length are unsatisfactory for support cantilever frame, when bracket protruded length reaches 1.3 meters, meet that site operation is hung
Dress demand；In this regard, bracket lengthening must be carried out；When carrying out lengthening section bracket, the axis of exposed bracket, absolute altitude are measured and done first
Good mark, while the scaffolding pole around bracket is removed temporarily, and consolidation process is carried out to scaffold, finally lifting
When sling with tower crane, support using exposed bracket and building body scaffold and make splicing operation platform with angle steel plank, with positioning plate, straight
Angle square, ruler are welded lengthening section according to the measuring line made in place.
The other parts of the present embodiment are same as the previously described embodiments, and so it will not be repeated.
The above, is only presently preferred embodiments of the present invention, not does limitation in any form to the present invention, it is every according to
Any simply modification, the equivalent variations made according to the technical spirit of the present invention to above example, each fall within the protection of the present invention
Within the scope of.
Claims (10)
1. a kind of aerial steel structure truss construction of Long span, it is characterised in that comprise the steps of：
Step 1：Preparation before construction；
Step 2：Lift each section of pre-buried steel spinous process of the seventh cervical vertebra, pre-buried girder steel；
Step 3：The installation of hanging device, specifically includes following steps；
Step 31：Two hoist engines are separately mounted in the floor plates of two main building tops；
Step 32：Sub-truss is placed on bracket by the bracket for stretching out building body using top gooseneck as supporting point during lifting
On be welded and fixed；
Step 33：Cantilever frame is weldingly fixed on sub-truss, drag-line is hung in floor on pre-buried steel column；
Step 34：Lifting truss welding is fixed on cantilever frame；
Step 35：Pulley blocks are fixedly mounted on lifting truss；
Step 4：Live steel truss lifting, specifically includes following steps；
Step 41：Preparation before steel truss lifting；
Step 42：Steel truss is erected, while starts hoist engine and slings steel truss to pre-determined bit；
Step 43：After steel truss rises and is raised to pre-determined bit, steel truss is sling with jack, steel truss is moved to installation using jack
Position；
Step 44：Steel truss is welded, removes jack；Complete the side steel truss installation；
Step 45：Repeat above steel truss hoisting to make, complete all monolithic steel truss installations, remove hanging device；
Step 46：Steel secondary beam, lifting steel column, the steel diagonal brace column of interface position and composite floor of mating formation are lifted successively, are completed
Steel Structure Installation.
A kind of 2. aerial steel structure truss construction of Long span according to claim 1, it is characterised in that the step
One specifically includes following steps：
Step 11：The structural features that sectional making is completed are transported to construction site platform for lining, are tested according to code requirement
Receive, structural features are assembled into monolithic truss after qualification；The platform for lining is arranged on the centre for needing to install steel truss floor
On floor；The platform for lining is installed on the platform buttress on girder；The platform buttress is arranged on girder every 3-5 meters
On；The platform buttress upper surface is on same level absolute altitude；
Step 12：The monolithic steel truss that assembly is completed is transported to below lifting point by sliding rail；
Step 13：Hanging device is installed required material to be transported to below tower crane；
Step 14：The girder axis of lifting segment and length control line are carried out into mark.
A kind of 3. aerial steel structure truss construction of Long span according to claim 1, it is characterised in that the step
Two specifically refer to before the pre-buried steel spinous process of the seventh cervical vertebra, pre-buried steel beam lifting is carried out, and first do the orientation axis of steel column bone and absolute altitude datum line
Go out, while weld interim positioning plate as needed on the inside of flange plate；Then the two-way vertical of theodolite control steel column bone is utilized
Spend, while the precision of steel column locations is examined with measuring tape, carry out steel column bone installation；After completing the installation of steel column bone, pre-buried girder steel is lifted.
A kind of 4. aerial steel structure truss construction of Long span according to claim 1, it is characterised in that the step
Bracket protruded length in 32 is the safety value calculated according to live practical structures；The bracket protruded length deficiency safety value
When, bracket lengthening must be carried out；When carrying out lengthening section bracket, the axis of exposed bracket, absolute altitude are measured first and carry out mark, together
When the scaffolding pole around bracket is removed temporarily, and to scaffold carry out consolidation process, finally lifting when tower crane
Sling, support using exposed bracket and building body scaffold and make splicing operation platform with angle steel plank, with positioning plate, square, straight
Ruler is welded lengthening section according to the measuring line made in place.
A kind of 5. aerial steel structure truss construction of Long span according to claim 1, it is characterised in that the step
33 specifically refer to before cantilever frame is sling, and drag-line steel wire is first hung up, and after hanging installation site, drag-line is hung in floor
On pre-buried steel column, adjust after drag-line and cantilever frame meet the requirements and be welded and fixed.
A kind of 6. aerial steel structure truss construction of Long span according to claim 1, it is characterised in that the step
Steel truss in four uses from top to bottom symmetrically to be lifted with layer.
A kind of 7. aerial steel structure truss construction of Long span according to claim 1, it is characterised in that the step
41, specifically include following steps：
Step 411：Before live steel truss lifting is carried out, safe practice is carried out to Field Force and is told somebody what one's real intentions are；
Step 412：The working condition that structural features examine equipment is first hung before steel truss is lifted, drills the skilled operation of worker
Degree；
Step 413：Steel wire rope, hoist engine, jack are checked before lifting, checks the flexibility of spool turns, check braking has
Effect property, checks whether circuit is safe and smooth；If finding undesirable project during the inspection process, must carry out immediately whole
Change, after rectification is qualified, into next process.
A kind of 8. aerial steel structure truss construction of Long span according to claim 1, it is characterised in that the step
42 specifically refer to when slinging steel truss, wait steel truss to stablize, and after not waving, rocking, two hoist engines of control are with same
Speed sync is run, and is promoted to pre-determined bit；The operating status of observation component in lifting process.
A kind of 9. aerial steel structure truss construction of Long span according to claim 1, it is characterised in that the step
43 specifically refer to after steel truss is promoted to pre-determined bit, sling steel truss with jack, after waiting jack to entail much effort, do not unclamp elevator
Machine, makes steel truss be moved to installation position using jack.
A kind of 10. aerial steel structure truss construction of Long span according to claim 1, it is characterised in that the step
Rapid 44 specifically refer to the steel truss carries out size repetition measurement by the assembled weldering of steel truss using positioning plate, square, ruler in the air
Connect completion；The steel truss before being welded, welding job face underhung safety net and in safety net upper berth asbestos
Cloth.
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| CN106522362A (en) * | 2016-12-29 | 2017-03-22 | 上海市机械施工集团有限公司 | Construction device and construction method of steel structure beam of corridor system |
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| CN111734148B (en) * | 2020-06-03 | 2022-03-11 | 中国核工业华兴建设有限公司 | Alternate hoisting method in semi-hollow U-shaped long and narrow space |
| CN113982284A (en) * | 2021-10-28 | 2022-01-28 | 中铁三局集团建筑安装工程有限公司 | Installation method of large-span special-shaped steel structure toll booth |
| CN114233014A (en) * | 2022-01-06 | 2022-03-25 | 杭州城投建设有限公司 | Mounting method of high-altitude large-span steel truss |
| CN114687565A (en) * | 2022-04-26 | 2022-07-01 | 中国建筑第七工程局有限公司 | Construction method for splicing, sliding and lifting large-span steel beam at high altitude |
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