CN107100271A - A kind of method that utilization adjustable drawbar adjusts steel member camber - Google Patents
A kind of method that utilization adjustable drawbar adjusts steel member camber Download PDFInfo
- Publication number
- CN107100271A CN107100271A CN201710355445.5A CN201710355445A CN107100271A CN 107100271 A CN107100271 A CN 107100271A CN 201710355445 A CN201710355445 A CN 201710355445A CN 107100271 A CN107100271 A CN 107100271A
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- steel member
- adjustable drawbar
- steel
- section
- adjusts
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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
- E04B1/342—Structures covering a large free area, whether open-sided or not, e.g. hangars, halls
-
- 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
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
Abstract
A kind of method that utilization adjustable drawbar adjusts steel member camber, including step are as follows：Step one, technique preparation；Whether enough step 2, check adjustable drawbar tensile capacity；Step 3, checks absolute altitude and the plan-position of the connector for the connection adjustable drawbar buried on the body construction in advance；Step 4, by steel member with being tentatively connected in agent structure；Step 5, one end of adjustable drawbar is detachably connected with agent structure, is fixedly connected with steel；Step 6, measures the crucial section actual elevation of steel member and root actual elevation；At step 7, adjustment adjustable drawbar to final theoretical elevation location；Step 8, is finally fixed to steel member；Step 9, adjusts adjustable drawbar, steel member is progressively unloaded.The invention solves the problems that traditional construction method installs large span or potential safety hazard big technical problem when long cantilever construction part time length, construction cost be high, installation accuracy is low and component that is being pointed on the outside of structure is installed.
Description
Technical field
The present invention relates to a kind of method that utilization adjustable drawbar adjusts steel structure girder camber.
Background technology
With the progress of Building technology, increasing high-rise building or public building are in order to realize construction style and work(
The variation of energy, there is provided more large span or super large cantilevered structure.The application of large span or long cantilever construction, can be more effective
Utilization space resource there is provided more lower spaces, it is to avoid post net causes the missing of architectural aesthetic feeling, and by building
Strong artistic feeling can more be given by building the large-scale overhanging steel structure after design minute design.Such large span or large cantilever knot
The general present position of component is higher, component is heavier, it is necessary to the pre- arch camber that precision is higher.Constructed using traditional construction method such
Often there are the following problems for component：The precision that set-up time is more, construction cost is high, large cantilever component is installed is low, while installing outstanding
Choosing component during steel construction, to be located at the potential safety hazard produced when being installed on the outside of structure big.
The content of the invention
It is an object of the invention to provide a kind of method that utilization adjustable drawbar adjusts steel structure girder camber, tradition is solved
Construction method large span or long cantilever construction part time length are installed, construction cost is high, installation accuracy is low and is pointed to structure
Potential safety hazard big technical problem when the component in outside is installed.
To achieve the above object, the present invention is adopted the following technical scheme that.
A kind of method that utilization adjustable drawbar adjusts steel construction camber, including step are as follows.
Step one, technique preparation；Draw the pre- springing height value in the crucial section of steel member to be installed, and comprehensive welding shadow
Deflection value c is rung, the final theoretical absolute altitude in the crucial section of steel member is determined.
Step 2, checks in installation process and the crucial section of steel member to be pulled into step by designed elevation using adjustable drawbar
In one during final theory absolute altitude, whether adjustable drawbar tensile capacity is enough.
The absolute altitude for the connector to connect adjustable drawbar buried on the body construction in advance is checked before step 3, installation
And plan-position.
Step 4, steel member is hung at designed elevation, with pre-plugged on the body construction, to be connected steel member
Built-in fitting is tentatively connected.
Step 5, adjustable drawbar is hung to above steel member, and the connector on one end and agent structure of adjustable drawbar can
Dismounting connection, the other end is fixedly connected with steel member.
Step 6, measures the crucial section actual elevation of steel member and root actual elevation, and show that steel member key is cut
The actual elevation in face and theoretical absolute altitude deviation.
Step 7, adjusts adjustable drawbar, tension load is progressively applied to steel member, by the crucial sectional position initial adjustment of steel member
At the final theoretical elevation location in the whole crucial section of the steel member determined into step one.
Step 8, checks the actual elevation in the crucial section of steel member, and continue adjustment adjustable drawbar until actual elevation with
Final theory absolute altitude zero deflection, to encorbelmenting, steel member is finally fixed.
Step 9, adjusts adjustable drawbar, steel member is progressively unloaded to encorbelmenting, and steel member of encorbelmenting is measured while monitoring
Downwarp size, treats that downwarp height value is equal to steel member to be installed deadweight and uniform mobile load of constructing causes deflection value a to be influenceed with welding
After deflection value c sums, i.e. a+c, continue progressively to carry out unloading component, unloaded completely after no longer downwarp to be monitored.
It is preferred that, steel member described in step one is cantilever steel girder or the steel to be spliced successively by one group of girder steel unit
Beam；When the steel member is cantilever steel girder, crucial section is end face of encorbelmenting；When the steel member be by one group of girder steel unit according to
It is secondary be spliced girder steel when, crucial section be girder steel spaning middle section.
It is preferred that, the pre- springing height value in the crucial section of steel member is as the dead load suffered by steel member and 1/2 in step one
Obtained by mobile load superposition calculation, this pre- springing height value due to deadweight and is constructed equal to the crucial section of steel member in installation process
Uniform mobile load causes deflection value a and deflection value b caused by floow load after installation summation, i.e. a+b；Comprehensive welding influence
After deflection value c, the final theoretical absolute altitude in crucial section is：The designed elevation in a+b+c+ keys section.
It is preferred that, the adjustable drawbar described in step 2 includes a sleeve sections and two linkage sections；The sleeve sections
Two ends are equipped with internal thread, and wherein one end is levogyrate inner thread, and the other end is dextrorotation internal thread；One end of the linkage section
Provided with connection otic placode, the other end is provided with the external screw thread corresponding with internal thread on sleeve sections；Between the linkage section and sleeve sections
Pass through the adjustable connection of screw thread.
It is preferred that, it is provided with the steel pole to turnbarrel section on the sleeve sections of the adjustable drawbar, close to middle position.
It is preferred that, connector described in step 3 includes connecting plate and hanger one；The connecting plate is fixedly connected on main body
On texture edge；The hanger one is connected on connecting plate；Built-in fitting in the step 4 is to be welded to connect in agent structure
On bracket.
It is preferred that, adjustable drawbar and connector is detachably connected specifically, the connection of adjustable drawbar one end in step 5
Connected between otic placode and hanger one by bearing pin；Adjustable drawbar is fixedly connected with the company of the specially adjustable drawbar other end with steel member
It is welded to connect between ear connecting plate and hanger two.
It is preferred that, the adjustment adjustable drawbar specific method described in step 7 is to rotate the sleeve sections of adjustable drawbar, make set
Progressively tightened between cylinder section and linkage section, the reality in crucial section is adjusted by increasing pulling force that adjustable drawbar produces to steel member
Border springing height value.
It is preferred that, the final fixing means that carried out to steel member of encorbelmenting described in step 8 is to coordinate to weld using high-strength bolt
Connect and be connected.
It is preferred that, the adjustment adjustable drawbar specific method described in step 9 is to reversely rotate the sleeve sections of adjustable drawbar,
Make progressively to unscrew between sleeve sections and linkage section, crucial section is adjusted by reducing pulling force that adjustable drawbar produces to steel member
Actual downwarp value.
Beneficial effects of the present invention are as follows.
1st, the present invention is installed requires low to execution conditions, and installation component is not limited by construction site condition；Compare traditional approach
Avoid and set up a large amount of support bodys, save expense and manpower and materials.
2nd, the present invention directly adjusts the springing height in the crucial section of steel member with adjustable drawbar, can greatly improve construction effect
Rate, shortens the construction period that cantilever steel girder is installed.
3rd, it is that pivot pin is connected between adjustable drawbar and agent structure or steel member in the present invention, working measure is simply easy
Tear open, efficiency of construction can be greatly improved, shorten the construction period that cantilever steel girder is installed；And due to adjustable drawbar and agent structure it
Between it is detachable, component used in compensation linkage installation system can all realize turnover, can be achieved zero and be lost.
4th, regulation is repeated to the actual elevation in the crucial section of steel member and meets, be combined for the method in the present invention, so that
Make cantilever steel girder installation accuracy higher.
5th, the method regulation steel member camber in the present invention is safe and reliable so that the safe of cantilever steel girder installation personnel is obtained
To guarantee；
6th, the method in the present invention is applied to that required precision is higher and the limited large span of execution conditions or large overhanging steel structure
Install.
Brief description of the drawings
The present invention is further described with reference to the accompanying drawings and examples.
Fig. 1 is the front schematic view of adjustable drawbar in the present invention.
Fig. 2 is the side schematic view of adjustable drawbar in the present invention.
Fig. 3 is a kind of embodiment schematic diagram that steel member is connected with agent structure in the present invention.
A kind of embodiment schematic diagram when Fig. 4 is the actual elevation in the crucial section of adjustable drawbar adjustment in the present invention.
Reference：1- steel members, 2- agent structures, 3- adjustable drawbars, 31- sleeve sections, 32- linkage sections, 33-
Steel pole, 4- connecting plates, 5- hangers one, 6- hangers two.
Embodiment
As Figure 1-4, the method that this utilization adjustable drawbar adjusts steel construction camber, including step are as follows.
Step one, technique preparation；Draw the pre- springing height value in the crucial section of steel member 1 to be installed, and comprehensive welding
Deflection value c is influenceed, the final theoretical absolute altitude in the crucial section of steel member 1 is determined.
Step 2, checks in installation process and the crucial section of steel member 1 to be pulled into step by designed elevation using adjustable drawbar 3
In rapid one during final theory absolute altitude, whether the tensile capacity of adjustable drawbar 3 is enough；Check the calculating of the tensile capacity of adjustable drawbar 3：
Load is girder steel deadweight+construction live load, calculates the limit tensile capacity of adjustable drawbar 3, compares the size of the two.
The mark for the connector to connect adjustable drawbar 3 buried in advance in agent structure 2 is checked before step 3, installation
High and plan-position.
Step 4, coordinates jack that steel member 1 is hung at designed elevation, with pre-plugged in agent structure using lifting machine
Above, tentatively connected to connect the built-in fitting of steel member 1, connect calculating requirement temporarily by the end of steel member 1, calculate and wear
Enter corresponding connecting bolt or welded steel beam installs the bearing capacity of locating clamp plate, interim install is carried out to steel member 1 and is fixed.
Step 5, the top of steel member 1, one end and the connection in agent structure 2 of adjustable drawbar 3 are hung to by adjustable drawbar 3
Part is detachably connected, and the other end is fixedly connected with steel member 1.
Step 6, measures the crucial section actual elevation of steel member 1 and root actual elevation, and show that steel member 1 is crucial
The actual elevation in section and theoretical absolute altitude deviation.
Step 7, adjusts adjustable drawbar 3, inclined by the actual elevation and theoretical absolute altitude in the crucial section of the steel member 1 drawn
Difference, determining that adjustable drawbar 3 rotates a circle according to setting angle can make two ends absolute altitude lift numerical value, by adjustable drawbar 3 to steel structure
Part 1 progressively applies tension load, will adjust that the steel member 1 that is determined into step one is crucial to be cut at the beginning of the crucial sectional position of steel member 1
At the final theoretical elevation location in face, described setting angle is the angle between adjustable drawbar 3 and steel member 1, in the range of
30 °~60 °.
Step 8, checks the actual elevation in the crucial section of steel member 1, and continues adjustment adjustable drawbar 3 until actual elevation
With final theoretical absolute altitude zero deflection, to encorbelmenting, steel member 1 is finally fixed.
Step 9, adjusts adjustable drawbar 3, steel member 1 is progressively unloaded to encorbelmenting, the steel member while monitoring measurement is encorbelmented
1 downwarp size, treat downwarp height value equal to steel member 1 to be installed conduct oneself with dignity and construct uniform mobile load cause deflection value a with welding
Influence after deflection value c sums, i.e. a+c, continue progressively to carry out unloading component, unloaded completely after no longer downwarp to be monitored, now.
In the present embodiment, steel member 1 described in step one is cantilever steel girder or to be spliced successively by one group of girder steel unit
Into girder steel；When the steel member 1 is cantilever steel girder, crucial section is end face of encorbelmenting；When the steel member 1 is by one group of steel
During the girder steel that beam element is spliced successively, crucial section is girder steel spaning middle section.
In the present embodiment, the pre- springing height value in the crucial section of steel member 1 is as the dead load suffered by steel member 1 in step one
（Generally conduct oneself with dignity）With 1/2 mobile load（Generally construction live load takes 2.5KN/m2）Obtained by superposition calculation, this pre- springing height value
Equal to steel member 1 crucial section in installation process because uniform mobile load of conducting oneself with dignity and construct causes deflection value a and installation
The summation of deflection value b caused by floow load afterwards；The calculating load of deflection value b caused by floow load after installation is：
1/2（There is girder steel deadweight+slab thickness deadweight+flooring dead load+floor live load in place of encorbelmenting）；Consider to pacify girder steel in site operation
The minimum welding sequence of dress influence carries out 1:1 welding scene Welding experiment draws the influence to welding deflection value c.Therefore, if with
Face on the basis of horizontal plane where agent structure and steel member tie point, the crucial sectional position of steel member 1 is most before welding
Eventually theory absolute altitude be a+b+c and designed elevation and；The crucial sectional position of steel member 1 is that theoretical absolute altitude is b and design after welding
The sum of absolute altitude.
In the present embodiment, the adjustable drawbar 3 described in step 2 includes a sleeve sections 31 and two linkage sections 32；Institute
State the two ends of sleeve sections 31 and be equipped with internal thread, and wherein one end is levogyrate inner thread, and the other end is dextrorotation internal thread；The company
The one end for connecing section 32 is provided with connection otic placode, and the other end is provided with the external screw thread corresponding with internal thread on sleeve sections；The linkage section
Pass through the adjustable connection of screw thread between 32 and sleeve sections 31.
In the present embodiment, it is provided with the sleeve sections 31 of the adjustable drawbar 3, close to middle position to turnbarrel section
31 steel pole 33, rotates steel pole 33, so as to drive sleeve sections 31 to rotate using spanner.
In the present embodiment, connector described in step 3 includes connecting plate 4 and hanger one；The connecting plate 4 is fixedly connected
On the side of agent structure 2；The hanger one is connected on connecting plate 4；Built-in fitting in the step 4 is to be welded to connect
Bracket in agent structure 2.
In the present embodiment, adjustable drawbar 3 and connector is detachably connected specifically, the one end of adjustable drawbar 3 in step 5
Connection otic placode and hanger one between connected by bearing pin；Adjustable drawbar 3 is fixedly connected with specially adjustable drawbar 3 with steel member 1
It is welded to connect between the connection otic placode and hanger 26 of the other end.
In the present embodiment, the specific method of adjustment adjustable drawbar 3 described in step 7 is to rotate the sleeve of adjustable drawbar 3
Section 31, makes progressively to tighten between sleeve sections 31 and linkage section 32, by increase pulling force that adjustable drawbar 3 produces to steel member 1 come
The actual springing height value in the crucial section of adjustment.
In the present embodiment, carry out final fixing means to steel member 1 of encorbelmenting to use high-strength bolt described in step 8
Cooperation is welded to connect fixation.
In the present embodiment, the specific method of adjustment adjustable drawbar 3 described in step 9 is to reversely rotate adjustable drawbar 3
Sleeve sections 31, make progressively to unscrew between sleeve sections 31 and linkage section 32, by reducing the drawing that adjustable drawbar 3 is produced to steel member 1
Power adjusts the actual downwarp value in crucial section.
In other embodiments, adjustable drawbar 3 can also use continuous steel beam, Simply-supported Steel Beams or semi-girder girder steel.
The instrument such as following table used during girder steel is installed using compensation linkage installation system：
Use compensation linkage installation system install girder steel during workmen for：The people of installation personnel 3, the people of survey crew 2, ground
The people of personnel 3 is linked up with face, and the people of welding personnel 1 sees the fiery people of personnel 1.
Performance analysis：Carry out cantilever steel girder being installed or big across girder steel using compensation linkage, saved greatly than traditional approach
Amount sets up the expense of support body, according to every 23 yuan of calculating of square meter support body, and the girder steel that installation weighs about 6 tons about needs to set up the square meter of support body 50,
The engineering encorbelmented is set about to save expense 23*50*2*2*40=184000 yuan for 40 layers of bilateral of this project.Adjustable drawbar is put into
Expense is about 10000 yuan, and about 174000 yuan or so are saved than traditional approach.
Claims (10)
1. a kind of method that utilization adjustable drawbar adjusts steel member camber, it is characterised in that as follows including step：
Step one, technique preparation；Draw steel member to be installed（1）Crucial section pre- springing height value, and comprehensive welding shadow
Deflection value c is rung, steel member is determined（1）The final theoretical absolute altitude in crucial section；
Step 2, checks and adjustable drawbar is utilized in installation process（3）By steel member（1）Crucial section step is pulled to by designed elevation
In rapid one during final theory absolute altitude, adjustable drawbar（3）Whether tensile capacity is enough；
Checked before step 3, installation in advance in agent structure（2）It is upper embedded to connect adjustable drawbar（3）Connector mark
High and plan-position；
Step 4, by steel member（1）It is hung at designed elevation, with pre-plugged in agent structure（2）Above, to connect steel member
（1）Built-in fitting tentatively connected；
Step 5, by adjustable drawbar（3）It is hung to steel member（1）Top, adjustable drawbar（3）One end and agent structure（2）On
Connector is detachably connected, the other end and steel member（1）It is fixedly connected；
Step 6, measures steel member（1）Crucial section actual elevation and root actual elevation, and draw steel member（1）It is crucial
The actual elevation in section and theoretical absolute altitude deviation；
Step 7, adjusts adjustable drawbar（3）, to steel member（1）Progressively apply tension load, by steel member（1）Crucial section position
Put and just adjust the steel member determined into step one（1）At the final theoretical elevation location in crucial section；
Step 8, checks steel member（1）The actual elevation in crucial section, and continue to adjust adjustable drawbar（3）Until actual elevation
With final theoretical absolute altitude zero deflection, to steel member of encorbelmenting（1）Finally fixed；
Step 9, adjusts adjustable drawbar（3）, to steel member of encorbelmenting（1）Progressively unloaded, the steel member while monitoring measurement is encorbelmented
（1）Downwarp size, treat downwarp height value be equal to steel member to be installed（1）Conduct oneself with dignity and uniform mobile load of constructing cause deflection value a with
After welding influence deflection value c sums, i.e. a+c, continue progressively to carry out unloading component, unloaded completely after no longer downwarp to be monitored.
2. a kind of method that utilization adjustable drawbar adjusts steel member camber, it is characterised in that steel member described in step one（1）
Girder steel for cantilever steel girder or to be spliced successively by one group of girder steel unit；
When the steel member（1）During for cantilever steel girder, crucial section is end face of encorbelmenting；
When the steel member（1）For be spliced successively by one group of girder steel unit girder steel when, crucial section is that girder steel span centre is cut
Face.
3. the method that a kind of utilization adjustable drawbar according to claim 2 adjusts steel member camber, it is characterised in that：Step
Steel member in rapid one（1）Crucial section pre- springing height value by steel member（1）Suffered dead load is superimposed with 1/2 mobile load is drawn
Rise, this pre- springing height value is equal to steel member（1）Crucial section in installation process because uniform mobile load of conducting oneself with dignity and construct draws
Play deflection value a and deflection value b caused by floow load after installation summation, i.e. a+b；After comprehensive welding influence deflection value c,
The final theoretical absolute altitude in crucial section is：The designed elevation in a+b+c+ keys section.
4. the method that a kind of utilization adjustable drawbar according to claim 2 adjusts steel member camber, it is characterised in that：Step
Adjustable drawbar described in rapid two（3）Include a sleeve sections（31）With two linkage sections（32）；The sleeve sections（31）Two
End is equipped with internal thread, and wherein one end is levogyrate inner thread, and the other end is dextrorotation internal thread；The linkage section（32）One
End is provided with connection otic placode, and the other end is provided with the external screw thread corresponding with internal thread on sleeve sections；The linkage section（32）With sleeve
Section（31）Between pass through the adjustable connection of screw thread.
5. the method that a kind of utilization adjustable drawbar according to claim 4 adjusts steel member camber, it is characterised in that：Institute
State adjustable drawbar（3）Sleeve sections（31）Upper, close middle position is provided with to turnbarrel section（31）Steel pole（33）.
6. the method that a kind of utilization adjustable drawbar according to claim 2 adjusts steel member camber, it is characterised in that：Step
Connector described in rapid three includes connecting plate（4）With hanger one；The connecting plate（4）It is fixedly connected on agent structure（2）Sideways
On；The hanger one is connected to connecting plate（4）On；Built-in fitting in the step 4 is to be welded to connect in agent structure（2）On
Bracket.
7. the method that a kind of utilization adjustable drawbar according to claim 6 adjusts steel member camber, it is characterised in that：Step
Adjustable drawbar in rapid five（3）With being detachably connected specifically, adjustable drawbar for connector（3）The connection otic placode of one end and hanger one
Between connected by bearing pin；Adjustable drawbar（3）With steel member（1）It is fixedly connected with specially adjustable drawbar（3）The connection of the other end
Otic placode and hanger two（6）Between be welded to connect.
8. the method that a kind of utilization adjustable drawbar according to claim 7 adjusts steel member camber, it is characterised in that：Step
Adjustment adjustable drawbar described in rapid seven（3）Specific method is to rotate adjustable drawbar（3）Sleeve sections（31）, make sleeve sections
（31）With linkage section（32）Between progressively tighten, by increasing adjustable drawbar（3）To steel member（1）The pulling force of generation adjusts pass
The actual springing height value in key section.
9. the method that a kind of utilization adjustable drawbar according to claim 2 adjusts steel member camber, it is characterised in that：Step
Described in rapid eight to steel member of encorbelmenting（1）It is to coordinate to be welded to connect fixation using high-strength bolt to carry out final fixing means.
10. the method that a kind of utilization adjustable drawbar according to claim 8 adjusts steel member camber, it is characterised in that：
Adjustment adjustable drawbar described in step 9（3）Specific method is to reversely rotate adjustable drawbar（3）Sleeve sections（31）, make set
Cylinder section（31）With linkage section（32）Between progressively unscrew, by reducing adjustable drawbar（3）To steel member（1）The pulling force of generation is adjusted
The actual downwarp value in whole crucial section.
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| CN201710355445.5A CN107100271B (en) | 2017-05-19 | 2017-05-19 | A method of steel member camber is adjusted using adjustable drawbar |
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| CN201710355445.5A CN107100271B (en) | 2017-05-19 | 2017-05-19 | A method of steel member camber is adjusted using adjustable drawbar |
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| CN110241942A (en) * | 2019-06-26 | 2019-09-17 | 吉林建筑大学 | A kind of cold-rolled forming section faced wall of the anti-buckling support of the light-duty assembled of inner clip |
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| Publication number | Publication date |
|---|---|
| CN107100271B (en) | 2019-04-23 |
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