CN106088337B - Large cantilever steel frame structure with pull rod and construction method thereof - Google Patents
Large cantilever steel frame structure with pull rod and construction method thereof Download PDFInfo
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- CN106088337B CN106088337B CN201610580087.3A CN201610580087A CN106088337B CN 106088337 B CN106088337 B CN 106088337B CN 201610580087 A CN201610580087 A CN 201610580087A CN 106088337 B CN106088337 B CN 106088337B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 225
- 239000010959 steel Substances 0.000 title claims abstract description 225
- 238000010276 construction Methods 0.000 title claims abstract description 37
- 238000009434 installation Methods 0.000 claims abstract description 10
- 230000003014 reinforcing effect Effects 0.000 claims description 80
- 239000004567 concrete Substances 0.000 claims description 8
- 238000011900 installation process Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 2
- 238000000465 moulding Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 4
- 239000002131 composite material Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 239000004246 zinc acetate Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/34—Extraordinary structures, e.g. with suspended or cantilever parts supported by masts or tower-like structures enclosing elevators or stairs; Features relating to the elastic stability
- E04B1/3404—Extraordinary structures, e.g. with suspended or cantilever parts supported by masts or tower-like structures enclosing elevators or stairs; Features relating to the elastic stability supported by masts or tower-like structures
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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
- E04G21/12—Mounting of reinforcing inserts; Prestressing
-
- 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
- E04G21/12—Mounting of reinforcing inserts; Prestressing
- E04G21/121—Construction of stressing jacks
-
- 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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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The invention discloses a large cantilever steel frame structure with a pull rod and a construction method thereof. The method comprises the steps of pouring a core barrel, installing a cantilever layer steel structure, erecting a temporary steel column support, erecting a steel pull rod, constructing a roof and a roof framework layer steel frame and dismantling the temporary steel column support. The hoisting device is suitable for hoisting a large cantilever structure and a steel structure with a high and large inner space, and has the advantages of stable overall structure, high installation precision, high safety factor and small overall construction difficulty.
Description
Technical field
The present invention relates to buildings to overhang technical field of construction, in particular to a kind of large cantilever steel framework with pull rod
Frame structure and its construction method.
Background technology
With the development of technology, in modern architecture construction field, skyscraper gradually increases.And for beautiful or technique
Demand, skyscraper are often designed with outer cantilevered structure in the middle and upper part high level position of its agent structure, and outer cantilevered structure is usual
Outer overhanging steel structure truss is relied on to realize.
In existing constructing structure, cantilevered structure emerges one after another, but existing cantilevered structure is of limited application,
When encountering larger overhanging height and overhanging span, existing structure is simultaneously not suitable for, and is especially encountering inner space floor
When high, difficulty of construction bigger.Specifically, in the Construction of Steel Structure of large space, steel structure hoisting, installation it is impacted compared with
Greatly；High-formwork construction difficulty is big, and danger coefficient is high；And it needs to set up high support in the construction process to construct, overhanging and high
Large-spatial structures lifting, welding procedure difficulty are big.
Drawbacks described above is worth solving.
Invention content
In order to overcome the shortcomings of existing technology, the present invention provides a kind of large cantilever steel-frame structure with pull rod and its applies
Work method.
Technical solution of the present invention is as described below：
Large cantilever steel-frame structure with pull rod, including steel frame ontology, which is characterized in that the steel frame ontology includes
Two vertical Core Walls Structures and the N layer steel frames being set up on the Core Walls Structure, the steel frame includes girder steel, steel column and reinforcing bar
Truss floor support plate, the side lower end of the steel frame ontology are equipped with M layers of overhanging floor, and the hanging place of the overhanging floor is equipped with
Dismountable interim steel column support, M+1 layers to n-th layer are pull rod layer, and the number of plies N of the steel frame meets：7≤N≤16, institute
It states overhanging number of floor levels M and is not more than 4.
The steel frame ontology is longitudinally equipped with several axial planes, neighbouring two layers of the steel framework being located on the axial plane
Frame is fixed by reinforcing pull rod, and the reinforcing pull rod is located at the outside of the Core Walls Structure and in the ramped shaped of " outside under in upper ".
Further, by the way that in the fixed steel frame of reinforcing pull rod, every three layers of steel frame is one group of steel frame group,
In steel frame group described in every group, the outer fix of bottom steel frame connects the interposition of middle level steel frame by the reinforcing pull rod
It sets, the centre position of middle level steel frame connects the position on the inside of top layer steel frame close to Core Walls Structure by the reinforcing pull rod；Upper one
The bottom steel frame of the group steel frame group is the top layer steel frame of steel frame group described in next group.
Further, the top of n-th layer steel frame is equipped with top floor.
Further, the axial plane include the first axial plane, the second axial plane, third axial plane and the 4th axial plane, described first
Axial plane and second axial plane are located at the side of the steel frame ontology axial line, the third axial plane and the 4th axial plane pair
The other side for being distributed in the axial line claimed.
Further, auxiliary reinforcing pull rod, the auxiliary reinforcing pull rod are equipped in second axial plane, on the inside of the Core Walls Structure
It is symmetrical with the reinforcing pull rod of same layer.
Further, concrete crossover location of the interim steel column support set on one layer of ground.
Further, underground floor corresponding with the interim steel column Support Position is equipped with support.
Further, it is equipped with dismountable temporary support moulding bed at the large space inside the overhanging floor.
The construction method of large cantilever steel frame with pull rod, which is characterized in that include the following steps：
S1：Two Core Walls Structures are poured, and the steel construction of the 1st to M layers of floor of overhanging is installed；
S2：Span corresponds to steel column locations and sets up interim steel column support at floor overhanging and in two Core Walls Structures, described
Interim steel column support uses installation jack at the top of steel pipe buttress；
S3：M+1 layers of steel frame is installed, and pours M+1 layers of floorslab concrete, the first axial plane and the 4th axial plane
The pre- arch camber 10mm of steel frame, the steel frame includes girder steel, steel column, steel bar truss floor support plate；
S4：The steel frame of M+2 layers and M+3 layers is installed, and M+1 layers to M+3 layers of reinforcing pull rod is installed；
S5：Retain the support of interim steel column, makes overhanging end and internal greatly across vertical deformation close to 0mm；
S6：Step S3-S4, M+4 layers of steel frame for arriving n-th layer of installation are repeated, and the M+4 layers of steel for arriving n-th layer are installed
Pull rod；
S7：Construction roof and roof trusses layer steel frame；
S8:It successively constructs successively M+4 layers and arrives garret composite floor；
S9：The additional dead loads such as addition building way, curtain wall；
S10：Addition uses live load；
S11：Remove interim steel column support.
Further, the installation process of reinforcing pull rod includes in the step S4：
S41：The reinforcing pull rod of the second axial plane of tensioning is carried out using four sets of tensioning equipments simultaneously；
S42：The reinforcing pull rod on the outside of the Core Walls Structure of tensioning third axial plane is carried out using four sets of tensioning equipments simultaneously, it is upper per side
Fang Yigen reinforcing pull rods connect M+3 layers of steel frame close to the centre position of the position and M+2 layers of steel frame of Core Walls Structure, lower section one
Root reinforcing pull rod connects M+2 layers of steel frame centre position and M+1 layers of outer fix, makes the reinforcing pull rod on the outside of every side Core Walls Structure be in
The ramped shaped of " lower outer in upper ", substep tensioning simultaneously apply pretightning force；
S43：It is drawn simultaneously using the steel on the outside of four sets of tensioning equipments successively Core Walls Structure of the first axial plane of tensioning and the 4th axial plane
Bar, the reinforcing pull rod of top one per side connect centre of the M+3 layers of steel frame close to the position and M+2 layers of steel frame of Core Walls Structure
Position, the reinforcing pull rod of lower section one connect M+2 layers of steel frame centre position and M+1 layers of outer fix, make outside every side Core Walls Structure
The reinforcing pull rod of side utilizes torque wrench to apply the pretightning force in step S42 in the ramped shaped of " outside under in upper ".
Further, in the step S41, following steps are specifically included：
S411：4 reinforcing pull rods in first simultaneous tension both sides Core Walls Structure centre position, per the reinforcing pull rod connection at the Core Walls Structure of side
M+3 layers of steel frame are close to the centre position of the position and M+2 layers of steel frame of Core Walls Structure, and M+2 layers of steel frame of connection
Centre position and M+1 layers of position of the steel frame far from Core Walls Structure；
S412：Simultaneous tension Core Walls Structure both sides overhang 4 reinforcing pull rods at end, and M+ is connected per the reinforcing pull rod at the Core Walls Structure of side
3 layers of steel frame are in the centre position of the position and M+2 layers of steel frame of Core Walls Structure, and M+2 layers of steel frame of connection
Between position and M+1 layers of position of the steel frame far from Core Walls Structure；
S413：Substep tensioning simultaneously applies pretightning force, and steel frame is made to disengage interim steel column support, the steel per side Core Walls Structure both sides
Pull rod is distributed in "eight" shape.
Further, further include the construction of large space, specifically, before setting up the large space, described tall and big
Temporary support moulding bed is first set up at the position in space, then sets up the steel frame above the large space, it is interim removing
Steel column removes the temporary support moulding bed while support.
According to the present invention of said program, advantage is that present invention may apply to long cantilever constructions and inside
The lifting of the steel construction of large space can be adapted for overhanging height and reach 10-25 meters, and overhanging span reaches 15-23 meters of overhanging knot
Structure；Lifting, it is fixed after the completion of, interim steel column support and temporary support moulding bed are dismountable, and overall structure is stablized, and installation accuracy is high,
Safety coefficient is high, and integral construction difficulty is small；The present invention can also greatly save the construction time simultaneously.
Description of the drawings
Fig. 1 is the integrally-built side view of the embodiment of the present invention.
Fig. 2 is the side view of band of the embodiment of the present invention interim steel column support and temporary support moulding bed.
Fig. 3 is the structure top view of the embodiment of the present invention.
Fig. 4-7 is the side view of the first axial plane to the 4th axial plane of the invention.
In the figure 10, steel frame ontology；11, Core Walls Structure；12, girder steel；13, steel bar truss floor support plate；14, steel column；20、
Reinforcing pull rod；31, interim steel column support；32, temporary support moulding bed；41, the first axial plane；42, the second axial plane；43, third axial plane；
44, the 4th axial plane.
Specific implementation mode
Below in conjunction with the accompanying drawings and the present invention is further described in embodiment：
Embodiment one
As shown in Figs. 1-2, the large cantilever steel-frame structure with pull rod, including steel frame ontology 10, steel frame ontology 10 wrap
The N layer steel frames for including two vertical Core Walls Structures 11 and being set up on Core Walls Structure 11, steel frame include girder steel 12, steel column 14 and steel
Muscle truss floor support plate 13, the side lower end of steel frame ontology 11 are equipped with M layer of overhanging floor, overhang the hanging of floor and locate equipped with can
The interim steel column support 31 of dismounting, M+1 layers to n-th layer are pull rod layer, and steel frame ontology is longitudinally equipped with several axial planes, is located at axis
Neighbouring two layers of steel frame on face is fixed by reinforcing pull rod 20, reinforcing pull rod 20 be located at the outside of Core Walls Structure 11 and in " on
In it is lower outer " ramped shaped.
The number of plies N of steel frame meets：7≤N≤16, in the present embodiment, N=10, M=3, and build on the second layer
There are one two layers of large spaces.
It is one group of steel frame group per compound steel frame by 20 fixed steel frame of reinforcing pull rod, in every group of steel frame group,
The outer fix of bottom steel frame connects the centre position of middle level steel frame, the centre position of middle level steel frame by reinforcing pull rod 20
It is connected on the inside of top layer steel frame close to the position of Core Walls Structure 11 by reinforcing pull rod 20；The bottom steel frame of upper one group of steel frame group is
The top layer steel frame of next group of steel frame group.In the present embodiment, 4-6 layers are one group of steel frame group, the side of the 4th layer of steel frame
Edge position is connect by reinforcing pull rod 20 with the centre position of the 5th layer of steel frame, and the centre position of the 5th layer of steel frame passes through reinforcing pull rod
20 connect with the 6th layer of steel frame close to the position of Core Walls Structure 11；6-8 layers are second group of steel frame group, the side of the 6th layer of steel frame
Edge position is connect by reinforcing pull rod 20 with the centre position of the 7th layer of steel frame, and the centre position of the 7th layer of steel frame passes through reinforcing pull rod
20 connect with the 8th layer of steel frame close to the position of Core Walls Structure 11；And so on, until the centre position of the 9th layer of steel frame passes through
Reinforcing pull rod 20 is connect with the 10th layer of steel frame close to the position of Core Walls Structure 11.
The top of 10th layer of steel frame is equipped with top floor.
As shown in fig. 3 to 7, axial plane includes the first axial plane 41, the second axial plane 42, third axial plane 43 and the 4th axial plane 44, the
One axial plane 41 and the second axial plane 42 are located at the side of steel frame ontology axial line, and third axial plane 43 and the 4th axial plane 44 symmetrically divide
It is distributed in the other side of axial line.In second axial plane 42, the inside of Core Walls Structure 11 is equipped with auxiliary reinforcing pull rod 20, auxiliary reinforcing pull rod 20 with it is same
The reinforcing pull rod 20 of layer is symmetrical.That is, the center of inside position of the 4th layer of steel frame passes through in reinforcing pull rod 20 and the 5th layer of steel frame
The centre position in portion connects, and the centre position inside the 5th layer of steel frame is by reinforcing pull rod 20 and the 6th layer of steel frame close to Core Walls Structure
11 position connection, and so on.
Interim steel column support 31 is set to the concrete crossover location on one layer of ground.
Underground floor corresponding with interim steel column 31 positions of support is equipped with support.
Overhang and is equipped with dismountable temporary support moulding bed 32 at the large space inside floor.
The construction method for building the large cantilever steel frame with pull rod of above-described embodiment, includes the following steps：
One, two Core Walls Structures 11 are poured, and overhanging floor the 1st is installed to the 3rd layer of steel construction；
Two, span corresponds to steel column locations and sets up interim steel column support 31 at floor overhanging and in two Core Walls Structures 11,
Interim steel column support 31 uses installation jack at the top of steel pipe buttress；
Three, 4th layer of steel frame is installed, and pour the 4th layer of floorslab concrete, the first axial plane 41 and the 4th axial plane 44
The pre- arch camber 10mm of steel frame, steel frame include girder steel, steel column, steel bar truss floor support plate；
Four, 5th layer and the 6th layer of steel frame is installed, and the 4th layer to the 6th layer of reinforcing pull rod 20 is installed.Specifically,
1 while using the reinforcing pull rod 20 of the second axial plane of four sets tensioning equipments progress tensioning 42；It specifically includes step：
1. 4 reinforcing pull rods 20 in 11 centre position of first simultaneous tension both sides Core Walls Structure, per the reinforcing pull rod at side Core Walls Structure 11
20 the 6th layer of steel frame of connection are close to the centre position of the position of Core Walls Structure 11 and the 5th layer of steel frame, and the 5th layer of steel framework of connection
The centre position of frame and the 4th layer of position of the steel frame far from Core Walls Structure 11；
2. 11 both sides of simultaneous tension Core Walls Structure overhang 4 reinforcing pull rods 20 at end, connect per the reinforcing pull rod 20 at side Core Walls Structure 11
The 6th layer of steel frame is connect close to the centre position of the position of Core Walls Structure 11 and the 5th layer of steel frame, and the 5th layer of steel frame of connection
Centre position and the 4th layer of position of the steel frame far from Core Walls Structure 11；
3. substep tensioning simultaneously applies 1000kN pretightning forces, steel frame is set to disengage interim steel column support 31, per side Core Walls Structure 11
The reinforcing pull rod 20 of both sides is distributed in "eight" shape.
2 at the same carried out using four sets tensioning equipments tensioning third axial planes 43 11 outside of Core Walls Structure reinforcing pull rod 20, every side
Piece reinforcing pull rod 20 in top connect the 6th layer of steel frame in the position of Core Walls Structure 11 and the 5th layer of steel frame
Meta position
It sets, the reinforcing pull rod 20 of lower section one connects the 5th layer of steel frame centre position and the 4th layer of outer fix, makes every side core
Cylinder 11
The reinforcing pull rod 20 in outside is in the pretightning force of the ramped shaped of " lower outer in upper ", substep tensioning and the 1000kN of application；
3 while using on the outside of the Core Walls Structure of four sets tensioning equipments successively tensioning the first axial plane 41 and the 4th axial plane 44 11
Reinforcing pull rod 20, the reinforcing pull rod 20 of top one per side connect the 6th layer of steel frame close to the position of Core Walls Structure 11 and the 5th
Layer
The centre position of steel frame, the reinforcing pull rod 20 of lower section one connect the 5th layer of steel frame centre position and the 4th layer of outside position
It sets,
Make the reinforcing pull rod 20 in 11 outside of every side Core Walls Structure in the ramped shaped of " outside under in upper ", is applied using torque wrench initial
In advance
Clamp force.
Five, retain interim steel column support 31, make overhanging end and internal greatly across vertical deformation close to 0mm；
Six, it repeats Step 3: four, the steel frame of the 7th layer to the 10th layer of installation, and the steel for installing the 7th layer to the 10th layer is drawn
Bar 20；During installing 7-10 layers of reinforcing pull rod 20, the pretightning force that substep tensioning applies is 500kN.
Seven, construction roof and roof trusses layer steel frame；
Eight, it successively constructs the 7th layer successively and arrives garret composite floor；
Nine, the additional dead load such as addition building way, curtain wall；
Ten, addition uses live load；
11, interim steel column support 31 is removed.
Further, the installation process of reinforcing pull rod 20 includes in step 4：
Further include the construction of the large space of layer 2-3 in the present embodiment, specifically, before setting up large space, at the 2nd layer
Temporary support moulding bed 32 is first set up, then sets up the 4th layer of steel frame, interim branch is removed while removing interim steel column support 31
Support frame 32.
Application Example：
Extra large ruling by law mansion item body structure before Shenzhen City, Guangdong Province in 2016, which is smoothly realized, to bind.
Mansion project is ruled by law using unique " balance " design concept, with the band of the 11 stress Framed frame of Core Walls Structure of both sides
Brace steel frame structural system, while bridge mode of construction is applied, it is aided with the high-strength E650 realities of φ 220mm by the way that steel frame is arranged
Core brace solves east and west sides 17.4m large cantilevers and middle part large span, to realize more complicated Space Idea.The structure
Technical approach processing technology is complicated, and installation accuracy requirement is high, still belongs to the first in national house construction engineering.
During project construction, carries out 11 steel concrete integrated construction of Core Walls Structure, complete large overhanging steel structure installation, complete entirely
The construction of state's maximum gauge reinforcing pull rod 20 and steel construction health monitoring etc. become several big technical barriers and can construction plan suitable
The key that profit is implemented.
It should be understood that for those of ordinary skills, it can be modified or changed according to the above description,
And all these modifications and variations should all belong to the protection domain of appended claims of the present invention.
Illustrative description has been carried out to patent of the present invention above in conjunction with attached drawing, it is clear that the realization of patent of the present invention not by
The limitation of aforesaid way, if the various improvement of the methodology and technical solution progress of patent of the present invention are used, or without
It improves and the design of patent of the present invention and technical solution is directly applied into other occasions, be within the scope of the invention.
Claims (8)
1. the large cantilever steel-frame structure with pull rod, including steel frame ontology, which is characterized in that the steel frame ontology includes two
The top of the vertical Core Walls Structure of root and the N layer steel frames being set up on the Core Walls Structure, n-th layer steel frame is equipped with top floor,
The steel frame includes girder steel, steel column and steel bar truss floor support plate,
The side lower end of the steel frame ontology is equipped with M layers of overhanging floor, and the hanging place of the overhanging floor is equipped with detachably
The support of interim steel column, the steel frame ontology is longitudinally equipped with several axial planes, is located at neighbouring two layers on the axial plane
The steel frame is fixed by reinforcing pull rod, and the reinforcing pull rod is located at the outside of the Core Walls Structure and in the slope of " outside under in upper "
Shape,
By the way that in the fixed steel frame of reinforcing pull rod, every three layers of steel frame is one group of steel frame group, steel framework described in every group
In frame group, the outer fix of bottom steel frame connects the centre position of middle level steel frame, middle level steel frame by the reinforcing pull rod
Centre position pass through the reinforcing pull rod and connect position on the inside of top layer steel frame close to Core Walls Structure.
2. the large cantilever steel-frame structure according to claim 1 with pull rod, which is characterized in that the axial plane includes first
Axial plane, the second axial plane, third axial plane and the 4th axial plane, first axial plane and second axial plane are located at the steel frame sheet
The side of body axial line, the third axial plane and the 4th axial plane are symmetrically distributed in the other side of the axial line.
3. the large cantilever steel-frame structure according to claim 2 with pull rod, which is characterized in that in second axial plane,
Auxiliary reinforcing pull rod is equipped on the inside of the Core Walls Structure, the reinforcing pull rod for assisting reinforcing pull rod and same layer is symmetrical.
4. the large cantilever steel-frame structure according to claim 1 with pull rod, which is characterized in that the interim steel column support
Set on one layer of the concrete crossover location in ground.
5. the construction method of the large cantilever steel-frame structure with pull rod according to any one of claims 1-4, feature
It is, includes the following steps：
S1：Two Core Walls Structures are poured, and the steel construction of the 1st to M layers of floor of overhanging is installed；
S2：Span corresponds to steel column locations and sets up interim steel column support at floor overhanging and in two Core Walls Structures；
S3：M+1 layers of steel frame is installed, and pours M+1 layers of floorslab concrete, the steel frame include girder steel, steel column,
Steel bar truss floor support plate；
S4：The steel frame of M+2 layers and M+3 layers is installed, and M+1 layers to M+3 layers of reinforcing pull rod is installed；
S5：Retain the support of interim steel column, makes overhanging end and internal greatly across vertical deformation close to 0mm；
S6：Step S3-S4, M+4 layers of steel frame for arriving n-th layer of installation are repeated, and the M+4 layers of reinforcing pull rod for arriving n-th layer are installed；
S7：Construction roof and roof trusses layer steel frame；
S8:Successively construct successively M+4 layers arrive garret floorslab concretes；
S9：Remove interim steel column support；
S10：Addition building way, curtain wall add dead load；
S11：Addition uses live load.
6. the construction method of the large cantilever steel-frame structure according to claim 5 with pull rod, which is characterized in that the step
The installation process of reinforcing pull rod includes in rapid S4：
S41：The reinforcing pull rod of the second axial plane of tensioning is carried out using four sets of tensioning equipments simultaneously；
S42：The reinforcing pull rod on the outside of the Core Walls Structure of tensioning third axial plane, the top one per side are carried out using four sets of tensioning equipments simultaneously
Root reinforcing pull rod connects M+3 layers of steel frame close to the centre position of the position and M+2 layers of steel frame of Core Walls Structure, the steel of lower section one
Pull rod connects M+2 layer steel frame centre position and M+1 layers of outer fix, make the reinforcing pull rod on the outside of every side Core Walls Structure be in " on
In it is lower outer " ramped shaped, substep tensioning simultaneously applies pretightning force；
S43：Simultaneously using the reinforcing pull rod on the outside of four sets of tensioning equipments successively Core Walls Structure of the first axial plane of tensioning and the 4th axial plane, often
Piece reinforcing pull rod in top of side connects M+3 layers of steel frame close to the centre position of the position and M+2 layers of steel frame of Core Walls Structure,
The reinforcing pull rod of lower section one connects M+2 layers of steel frame centre position and M+1 layers of outer fix, makes the steel on the outside of every side Core Walls Structure
Pull rod utilizes torque wrench to apply the pretightning force in step S42 in the ramped shaped of " outside under in upper ".
7. the construction method of the large cantilever steel-frame structure according to claim 6 with pull rod, which is characterized in that the step
In rapid S41, following steps are specifically included：
S411：4 reinforcing pull rods in first simultaneous tension both sides Core Walls Structure centre position connect M+ per the reinforcing pull rod at the Core Walls Structure of side
3 layers of steel frame are in the centre position of the position and M+2 layers of steel frame of Core Walls Structure, and M+2 layers of steel frame of connection
Between position and M+1 layers of position of the steel frame far from Core Walls Structure；
S412：Simultaneous tension Core Walls Structure both sides overhang 4 reinforcing pull rods at end, and M+3 layers are connected per the reinforcing pull rod at the Core Walls Structure of side
Steel frame is close to the centre position of the position and M+2 layers of steel frame of Core Walls Structure, and the interposition of M+2 layers of steel frame of connection
It sets and M+1 layers of position of the steel frame far from Core Walls Structure；
S413：Substep tensioning simultaneously applies pretightning force, and steel frame is made to disengage interim steel column support, the reinforcing pull rod per side Core Walls Structure both sides
It is distributed in "eight" shape.
8. the construction method of the large cantilever steel-frame structure according to claim 5 with pull rod, which is characterized in that further include
The construction of large space first sets up interim branch specifically, before setting up the large space at the position of the large space
Support frame, then the steel frame above the large space is set up, face described in dismounting while removing interim steel column support
When support jig.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610580087.3A CN106088337B (en) | 2016-07-22 | 2016-07-22 | Large cantilever steel frame structure with pull rod and construction method thereof |
Applications Claiming Priority (1)
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| CN107190652B (en) * | 2017-06-05 | 2019-02-26 | 中建三局集团有限公司 | A kind of collection bundled tube intersects long cantilever class stayed-cable bridge structure system and construction method |
| CN107237404A (en) * | 2017-08-03 | 2017-10-10 | 中国十九冶集团有限公司 | Overhanging steel structure of strip steel pull rod and mounting method thereof |
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| CN111364615B (en) * | 2020-03-16 | 2021-06-22 | 山西四建集团有限公司 | Mounting method of special-shaped and curved surface suspension type steel structure system |
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| CN112814395B (en) * | 2021-01-04 | 2022-07-22 | 上海市机械施工集团有限公司 | Construction method of suspended steel structure |
| CN114263275B (en) * | 2022-01-06 | 2023-06-09 | 中建五局华东建设有限公司 | Construction method for same-layer construction of high-rise assembled steel structure-core tube |
| CN114607153B (en) * | 2022-03-07 | 2023-10-10 | 中建八局第三建设有限公司 | Hoisting construction process for large-span stay cable hanging multi-layer steel frame |
| CN115492399B (en) * | 2022-09-28 | 2023-04-25 | 浙江中天恒筑钢构有限公司 | Construction method for installing and adjusting hanging steel structure from bottom to top |
| CN118065534B (en) * | 2024-03-19 | 2024-07-26 | 北京市建筑设计研究院股份有限公司 | Construction method of continuous multilayer long cantilever structure |
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