CN106284663B - A kind of construction method of ellipse suspended-dome structure - Google Patents
A kind of construction method of ellipse suspended-dome structure Download PDFInfo
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- CN106284663B CN106284663B CN201610727246.8A CN201610727246A CN106284663B CN 106284663 B CN106284663 B CN 106284663B CN 201610727246 A CN201610727246 A CN 201610727246A CN 106284663 B CN106284663 B CN 106284663B
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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
- E04B1/32—Arched structures; Vaulted structures; Folded structures
- E04B1/3211—Structures with a vertical rotation axis or the like, e.g. semi-spherical structures
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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
- E04B1/32—Arched structures; Vaulted structures; Folded structures
- E04B2001/3229—Arched structures; Vaulted structures; Folded structures constructed using a boom
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Abstract
The invention discloses a kind of construction method of oval suspended-dome structure, including：Check that frame body sets up the collision with prestressed component using BIM technology, the tensioning value and deformation values of prestress element are determined using Midas softwares, using Tekla softwares to special-shaped rod piece accurate discharge, using disk buckle type scaffold as reticulated shell supporting frame, and carry out prestress element installation, using cranking arm, lift truck carries out erecting and welding as operating platform to truss around, using the small spelling of " splint " formula, " rice " word first closes up, from upper subregion ring from coil to coil is divided to carry out aerial scattered spelling to single-layer lattice shell by lower, solder sphere point position is determined using total powerstation and three dimensional adjustment device, prestressed stretch-draw is carried out by the way of tensioning radial direction pull rod, outer tension sequence is arrived in arriving again from inside to outside again and uses general displacement meter, vibratory strain ga(u)ge, magnetic flux transducer, total powerstation is comprehensive to be monitored.After the engineering tensioning that the present invention constructs only has the error of 8mm with design springing quantum, it was demonstrated that the advance of this method.
Description
Technical field
Construction method more particularly to a kind of oval suspended-dome structure the present invention relates to a kind of suspended-dome structure
Construction method belongs to steel structures in construction works technical field.
Background technology
Suspended-dome structure is also referred to as Suo Cheng latticed shell structures, is that traditional single-layer latticed shell and cable dome structure combine
Derivative, it integrates single-layer lattice shell and cable dome structure excellent performance in one, is in single-layer latticed shell and Cable dome knot
A kind of novel pre-stressed space structure system to grow up on the basis of structure, be born only more than two decades so far, structure by
Power is reasonable, and rigidity is big, light-weight, makes safety, also more convenient, can be more rationally more economical, crosses over large span more attractively
Space tentatively shows wide application prospect.However up to the present, the construction technology in relation to suspended-dome structure,
The Construction Study of especially large span suspended-dome structure is few, and more technical problem is still advanced in groping.These are summarized
Mainly to include two aspects：The practice of one incorporation engineering carries out construction technology research, and two carry out construction technology by model test
Research.These scattered construction technologies and construction experience cannot meet novel complex structure system-suspended-dome structure to building
The requirement of technology, single conventional construction method are even more to be difficult to be competent at, it is necessary to reference to a variety of construction technologies or be sought more first
Into novel construction method.In the construction method of suspended-dome structure, for suspended-dome structure, prestressed stretch-draw is applied
Work is a difficult point and a key point！
In the prior art, up to the present, jacking strut, tensioning strop and tensioning radial bars etc. are successively proposed in engineering
Three kinds of method for applying prestressing force.Jacking strut, the excellent and shortcoming of three kinds of method for applying prestressing force of tensioning strop and tensioning radial bars,
It is as follows respectively:
Strut method is jacked, is a kind of method for applying prestressing force used at suspended-dome structure engineer application initial stage.It is this
The advantages of method：
1st, the stretching force of strut is smaller, can reduce the tonnage of tensioning equipment.
2nd, strut tensioning is using self structure as reaction frame, without in addition increasing reaction frame.The span of early stage suspen-shell structure
It is smaller, and usually a ring tensegrity structures are only set, therefore the suspended-dome structure strut quantity of early stage is few, stress distribution
Low, jacking strut, which applies prestressed method, just becomes the prestressed preferred option of application.But it is prestressed scarce to jack strut
Point：
1st, the quantity of strut is more, and required tensioning equipment is more, generally can not achieve the synchronous tension with circle strut；
2nd, circumferential rope influences the alignment control of circumferential rope not in a level height after constructing；
3rd, under conditions of requiring strut lower end that can realize jacking, it is not easy to realize radial bars, three axis of circumferential rope and strut
The congruence is met at a bit.It is required to apply prestressed method for suspended-dome structure by tensioning strop for tensioning strop method
Tensioning equipment is less, and the linear of strop is easy to control, and in addition the design of strut lower node is also relatively simple, therefore in string Zhi Qiong
The mid-term of roof construction development, method for applying prestressing force is mainly tensioning circumferential direction rope.But giving string Zhi Qiong by tensioning circumferential direction rope
Roof construction applies in the engineer application of prestressing method, gradually finds, since strop and presence at strut lower node significantly rub
Power is wiped, and then causes serious prestressing frictional loss so that after the completion of tensioning construction, strop prestressing force is extremely uneven
It is even！
Tensioning radial bars method is with tensioning construction technological industrialization and commercial running, the quantity of tensioning equipment
It is more and more, therefore the method for tensioning radial bars is gradually adopted to substitute tensioning circumferential direction rope in suspended-dome structure engineering at present.
The method of tensioning radial bars can effectively avoid the loss of prestress caused by frictional force between strop and strut so that tensioning is applied
It is more uniform that work terminates post-stretching integral part prestress distribution！And due to the commercial running of stretching construction, it is same to solve realization
Plant issue needed for ring radial direction pull rod synchronous tension, therefore apply prestressed method by tensioning radial bars and be known as at present often
Method for applying prestressing force.
In recent years, domestic construction industry is reported suspen-shell structure construction method achievement in research periodical literature as follows：
1st, Wang Zeqiang, Qin Jie, Xu Ruilong, Zhang Ran, Li Guoli, Chen Xinli are published in《Construction technology》November the 36th in 2007
Roll up o. 11th page 9 " 2008 Olympic Games Badminton Stadium suspended-dome structure prestressed Construction Technology " document report：Set up ball
Load-bearing buttress and all round victory supporting rack carry out reticulated shell installation；2 5m × 5m operating platforms are set up, by prefabricated circumferential rope and radial direction
Reinforcing pull rod is transported to scene；Circumferential rope and cable tray are hung to operating platform and are laid with scaffold board as putting Suo Madao in strut lower part；
Put rope (circumferential rope) installation radial direction reinforcing pull rod hanging cable (circumferential rope)；1st grade of tensioning strop 70% designs stretching force (from outside to inside)；
2nd grade of tensioning strop designs stretching force (from outside to inside) to 90%；3rd level tensioning strop to 110% design stretching force (from it is inner to
Suo Li is adjusted outside)；It in stretching process, is checked by simulation calculation, and is deformed with total powerstation monitoring of structures, it should with vibratory string
Become meter monitoring of structures stress.
Although the tensioning process of above-mentioned report completes stretching construction, do not adopted clearly for all round victory in place of Shortcomings
With what supporting frame, this just proposes query for installation accuracy；The loss of prestress that tensioning circumferential direction rope is formed is especially big, although
By ultra stretching 10% (100% is stretched to 110%), but without monitoring device, only calculated by theoretical, actual rope force value is still
It is imprecise；Tension sequence (from outside to inside, from outside to inside, from inside to outside) is not optimal.
2nd, Guo Zhengxing, Tian Wei, Luo Bin are published in《Construction technology》In July, 2007 phase of volume 43 the 14th " Shao Xingshan of page 28
Water shop suspended-dome structure construction technology ", which is reported, supports C shops center suspended-dome structure using moulding bed, top reticulated shell ground
Assembled, subdivision upper air installing, method of the lower cable leverage without branch frame integral hoisting are installed；Using circulation stretch-draw in batches
The method of radial direction.Radial direction 2 step cycle tensioning of reinforcing pull rod point, the stretching mode of tensioning reinforcing pull rod establish prestressing force in the structure.
The shortcoming of this report is that support jig cost of manufacture is higher, though can reuse, the used time is not again
Know when, overall waste is larger, secondly support jig it is higher, security control it is bad still have certain hidden danger, prop up again
Support frame cannot function as prestressed stretch-draw operating platform, in batches circulation stretch-draw radial bars, and tensioning point position is more, operating platform requirement
It is more, and security is good, only support jig is completely inadequate；Top reticulated shell piecemeal lifting precision controlling is poor；Lower cable leverage
No branch frame integral hoisting comes very big constructional difficulties, the extremely difficult control of precision to top jointing strip；Radial direction 2 step cycles of reinforcing pull rod point
Tensioning, pulling anchor cable stage is few, if symmetrical synchronous tension control is bad, top reticulated shell easily is drawn inclined or unstability.
3rd, horse the authors such as is good for and is published in《Construction technology》The 553-557 pages of supplementary issue " Chiping style center of volume 41 in 2012
The prestressed cable tensioning reported in a gymnasium prestressed Construction Technology " text, (initial tension is arrived in tensioning to the 1st grade of tension sequence
40%) completed from outer ring to inner ring successively tensioning, unloaded afterwards, the 2nd grade (the 70% of tensioning to initial tension) is from inner ring to outer ring
Tensioning is completed successively, and 3rd level (the 100% of tensioning to initial tension) is completed from outer ring to inner ring successively tensioning, every grade of 7 steps of tensioning point
It completes.
More than three report, employ different tension sequences, advantage is to be completed stretching construction.Shortcoming
It is：The gap between springing quantum and design load after tensioning is not explicitly pointed out.It can not judge the superiority of the tension sequence.Then
Suspended-dome structure is that state-of-the-art construction method becomes construction engineering technical staff very using what kind of tension sequence
The technical issues of concern.The also trifling scattered construction technology of other document reports is being attempted to suspended-dome structure
Construction is explored, but again without a set of rational, effective, system the suspen-shell structure construction method of formation.
How using it is a set of it is rational, effective, system, to construction environment require low, highly practical, security
A kind of high oval suspended-dome structure construction method, becomes the problem of building industry engineers and technicians extremely pay close attention to, also
It is the problem of construction engineering technical staff urgently R and D.
The content of the invention
The purpose of the present invention, it is desirable to provide a kind of construction method of ellipse suspended-dome structure the method achieve ellipse
Circular suspended-dome structure safety, quick, precisely construction, are a kind of construction methods for ensureing construction quality.
To achieve the above object, used technical solution is the present invention：
A kind of construction method of ellipse suspended-dome structure, including BIM three dimensional virtual techniques well known to construction industry, building
Well known Midas softwares, Tekla softwares and three dimensional adjustment device in industry, it is characterised in that：The construction method, including following
Step：One) prestressing force check that frame body sets up collision with prestressed component using BIM technology, two) is determined using Midas softwares
The tensioning value and deformation values of rod piece, three) using Tekla softwares to special-shaped rod piece accurate discharge, four) made using disk buckle type scaffold
For reticulated shell supporting frame, and carry out prestress element installation, five) using crank arm lift truck as operating platform to truss around into
Row erecting and welding, six) the small spelling of " splint " formula is used, " rice " word first closes up, and divides ring from coil to coil to single-layer lattice shell from upper subregion by lower
Carry out aerial dissipate to spell, seven) solder sphere point position is determined using total powerstation and three dimensional adjustment device, eight) using tensioning radial direction pull rod
Mode carries out prestressed stretch-draw, arrive again from inside to outside in arrive again outer tension sequence and nine) using general displacement meter, vibratory string strain
Meter, magnetic flux transducer, total powerstation carry out comprehensive monitoring.Described one) to nine) the step of, concrete operations, be respectively：
One) BIM technology checks that frame body sets up the collision with prestressed component
Since prestressed component spatial attitude is in three dimensional arrangement, prestressed component will also move during prestressed stretch-draw, and adopt
Frame body is set up before construction with BIM technology and prestressed component has carried out virtual collision inspection, it is determined that frame body sets up position
It puts, avoids the interference of prestressed component and frame body in construction, it is ensured that stretching construction has certain shift length；
Two) Midas softwares determine the tensioning value and deformation values of prestress element
Prestressed stretch-draw process is emulated and calculated using Midas softwares, it is determined that tensioning step often walks tensioning
Value, corresponds to reticulated shell deformation values after tensioning；
Three) Tekla softwares are to special-shaped rod piece accurate discharge according to engineering modelling feature, and each component is in abnormity, size shape
Differ, scene, which is cut, changes adjustment, and difficulty is quite big, and carrying out accurate calculation to all rod pieces using Tekla softwares determines rod piece shape
And size, then factory's blanking make shaping, ensure that special-shaped rod piece is precisely installed；
Four) supporting frame of the disk buckle type scaffold as reticulated shell, and carry out the installation of prestressed component
Since reticulated shell ball node absolute altitude is different, supporting frame top absolute altitude is inconsistent, and need to adjust repeatedly, selects disk button
Scaffold is as supporting frame, and the frame body stability is good, high capacity, high safety, and adjustment is flexible, strop, strut, drawing
Bar is conveniently adjusted when installing, and convenient operating space is brought for tensioning construction after adjustment；
Five) lift truck of cranking arm carries out erecting and welding as operating platform to truss around
Using lift truck of cranking arm as operating platform, truss around is installed, is welded, stretched flexible, it is easy to operate,
Truss is installed successively with ring bar, is not interfere with each other, quick and safe；
Six) the small spelling of " splint " formula, " rice " word first close up, and from upper subregion ring from coil to coil are divided to carry out in the air single-layer lattice shell by lower
It dissipates and spells
Reticulated shell rod piece is in the small spelling of ground " splint " formula, tower crane lifting；Reticulated shell is whole to carry out " rice " word elder generation along central axis
Close up, consume assembled error, then spelled by lower from upper point 8 10 rings of differentiation by dissipate aerial to single-layer lattice shell progress of ring；
Seven) total powerstation and three dimensional adjustment device determine the single-layer lattice shell solder sphere installation of solder sphere point position, advance using high-altitude
Four measuring tables made, total powerstation, which is placed on measuring table, determines solder sphere point position, three dimensional adjustment device Three Degree Of Freedom essence
Really adjustment solder sphere center is overlapped with measurement position；
Eight) mode of tensioning radial direction pull rod carries out prestressed stretch-draw, arrive again from inside to outside in arrive outer tension sequence again
By Midas Software simulation calculations, the method for selecting tensioning " radial direction pull rod ", " based on control stretching force, structure becomes
Supplemented by shape " principle, the 20% of design load is stretched to from inner ring to outer ring from coil to coil using elder generation, then is stretched to and sets from outer ring to inner ring
The 70% of evaluation, 100% tension sequence that design load is finally stretched to from inner ring to outer ring carry out tensioning；
Nine) using general displacement meter, vibratory strain ga(u)ge, magnetic flux transducer, total powerstation carries out comprehensive monitoring
Stress and displacement are monitored during prestressed stretch-draw：Stress monitoring arranges 38 crucial monitoring points,
Using vibratory strain ga(u)ge, stress monitoring has been carried out to reticulated shell, reinforcement truss, pull rod, strut, peripheral truss；It is passed using magnetic flux
Sensor carries out stress monitoring to 3 rings to drag-line；Displacement monitoring is divided into horizontal displacement and vertical displacement, arranges 25 crucial monitorings
Point, bearing horizontal displacement is monitored using general displacement meter, monitors single-layer lattice shell vertical displacement using total powerstation, monitoring result accords with
Specification and design requirement are closed, it is satisfactory to complete construction.
Advantageous effect
Compared with prior art, the invention has the advantages that：
1st, select lift truck of cranking arm as operating platform compared with traditional landing stage of scaffold, peripheral truss installa-tion is welded and is saved
About 20 days durations save construction cost 50%.
2nd, a position is determined using three dimensional adjustment device cooperation total powerstation, solder sphere positioning is extremely convenient, and the device can
With Reusability, economical environment-protective.
3rd, reticulated shell is assembled uses the small spelling of " splint " formula, and " rice " word first closes up, and divides ring from coil to coil to individual layer from upper subregion by lower
Reticulated shell carries out aerial dissipate and spells, and ensure that splicing accuracy.
4th, steel construction stretching use is from inner ring to outer ring, returns to inner ring, finally arrives the tension sequence of outer ring again, it is perfect this
The tension sequence of class formation.
5th, comprehensive monitoring is carried out to suspen-shell structure, the design of class formation therefore provides valuable data.
6th, solder sphere point position is determined and using disk mouth formula scaffold as reticulated shell branch using total powerstation and three dimensional adjustment device
Support body, and pre-stress system rod piece installation is carried out, after reticulated shell assembly, vertically and horizontally length variation is 5mm, and maximum immunity value is
16mm meets specification and design requirement.
7th, after the engineering tensioning according to said method constructed only has the error of 8mm with design springing quantum, it was demonstrated that the elder generation of this method
Into property.
Description of the drawings
Fig. 1 is the constructing operation step schematic diagram of the present invention.
In Fig. 1：1 checks that frame body sets up the collision with prestressed component for BIM technology；2 determine prestressing force for Midas softwares
The tensioning value and deformation values of rod piece；3 for Tekla softwares to special-shaped rod piece accurate discharge；4 use disk buckle type scaffold as reticulated shell
Supporting frame, and carry out prestress element installation；5 crank arm lift truck as operating platform to truss around carry out erecting and welding；6
Using the small spelling of " splint " formula, " rice " word first closes up, and from upper subregion ring from coil to coil is divided to carry out aerial scattered spelling to single-layer lattice shell by lower；7
Total powerstation and three dimensional adjustment device determine solder sphere point position；The mode of 8 tensioning radial direction pull rods carries out prestressed stretch-draw, from inside to outside
Outer tension sequence is arrived again in arriving again；9 using general displacement meter, vibratory strain ga(u)ge, magnetic flux transducer, and total powerstation carries out full side
Position monitoring.
Specific embodiment
For those skilled in the art can be made to be better understood from technical scheme, below in conjunction with the accompanying drawings and most
The present invention is described in further detail for good example：
Embodiment
As shown in Figure 1, a kind of construction method of ellipse suspended-dome structure, comprises the following steps：One) BIM skills are used
Art checks that frame body sets up collision with prestressed component, two) tensioning value and the deformation of prestress element are determined using Midas softwares
Value, three) using Tekla softwares to special-shaped rod piece accurate discharge, four) using disk buckle type scaffold as reticulated shell supporting frame, and
Carry out prestress element installation, five) using crank arm lift truck as operating platform to truss around progress erecting and welding, six) adopt
With the small spelling of " splint " formula, " rice " word first closes up, and from upper subregion ring from coil to coil is divided to carry out dissipating spelling in the air to single-layer lattice shell by lower, and seven)
Solder sphere point position is determined using total powerstation and three dimensional adjustment device, eight) prestressing force is carried out by the way of tensioning radial direction pull rod
Draw, arrive again from inside to outside in arrive again outer tension sequence and nine) use general displacement meter, vibratory strain ga(u)ge, magnetic flux transducer,
Total powerstation carries out comprehensive monitoring.
Described one) to nine) the step of, concrete operations, be respectively：
One) BIM technology checks that frame body sets up collision with prestressed component since prestressed component spatial attitude is in three-dimensional
Arrangement, prestressed component will also move during prestressed stretch-draw, and frame body be set up before construction using BIM technology and prestressing force structure
Part has carried out virtual collision inspection, it is determined that frame body sets up position, avoids the interference of prestressed component and frame body in construction, really
Stretching construction has been protected with certain shift length；
Two) Midas softwares determine that the tensioning value of prestress element and deformation values are pulled through prestressing force using Midas softwares
It Cheng Jinhang emulation and calculates, it is determined that tensioning step often walks tensioning value, corresponds to reticulated shell deformation values after tensioning；Three) Tekla is soft
Part is to special-shaped rod piece accurate discharge according to engineering modelling feature, and each component differs in abnormity, size shape, and scene, which is cut, changes adjustment,
Difficulty is quite big, and carrying out accurate calculation to all rod pieces using Tekla softwares determines rod piece shape and size, then factory's blanking
Shaping is made, ensures that special-shaped rod piece is precisely installed；
Four) supporting frame of the disk buckle type scaffold as reticulated shell, and the installation of prestressed component is carried out due to reticulated shell ball-joint
Point absolute altitude is different, and supporting frame top absolute altitude is inconsistent, and need to adjust repeatedly, selects disk buckle type scaffold as supporting frame,
The frame body stability is good, high capacity, high safety, and adjustment is flexible, and strop, strut, pull rod are conveniently adjusted when installing, and are adjusted
After whole convenient operating space is brought for tensioning construction；
Five) erecting and welding is carried out to truss around as operating platform using lift truck of cranking arm
Using lift truck of cranking arm as operating platform, truss around is installed, is welded, stretched flexible, it is easy to operate,
Truss is installed successively with ring bar, is not interfere with each other, quick and safe；
Six) the small spelling of " splint " formula, " rice " word first close up, and from upper subregion ring from coil to coil are divided to carry out in the air single-layer lattice shell by lower
It dissipates and spells reticulated shell rod piece in the small spelling of ground " splint " formula, tower crane lifting；Reticulated shell integrally carries out " rice " word along central axis and first closes up,
Then the assembled error of consumption is spelled by lower from upper point 8 10 rings of differentiation by dissipate aerial to single-layer lattice shell progress of ring；
Seven) total powerstation and three dimensional adjustment device determine the single-layer lattice shell solder sphere installation of solder sphere point position, advance using high-altitude
Four measuring tables made, total powerstation, which is placed on measuring table, determines solder sphere point position, three dimensional adjustment device Three Degree Of Freedom essence
Really adjustment solder sphere center is overlapped with measurement position；
Eight) carry out prestressed stretch-draw by the way of tensioning radial direction pull rod, arrive again from inside to outside in arrive outer tensioning again suitable
Sequence
By Midas Software simulation calculations, the method for selecting tensioning " radial direction pull rod ", " based on control stretching force, structure becomes
Supplemented by shape " principle, the 20% of design load is stretched to from inner ring to outer ring from coil to coil using elder generation, then is stretched to and sets from outer ring to inner ring
The 70% of evaluation, 100% tension sequence that design load is finally stretched to from inner ring to outer ring carry out tensioning；
Nine) comprehensive monitoring is carried out using general displacement meter, vibratory strain ga(u)ge, magnetic flux transducer, total powerstation
Stress and displacement are monitored during prestressed stretch-draw：Stress monitoring arranges 38 crucial monitoring points,
Using vibratory strain ga(u)ge, stress monitoring is carried out to reticulated shell, reinforcement truss, pull rod, strut, peripheral truss, has been passed using magnetic flux
Sensor carries out stress monitoring to 3 rings to drag-line；Displacement monitoring is divided into horizontal displacement and vertical displacement, arranges 25 crucial monitorings
Point, bearing horizontal displacement is monitored using general displacement meter, monitors single-layer lattice shell vertical displacement using total powerstation, monitoring result accords with
Specification and design requirement are closed, it is satisfactory to complete construction.
The method of the present invention successful implementation created Physical Culture Institute's steel worm-gearing suspen-shell structure applied to Tianjin university of TCM in 2015
In structure.The steel worm-gearing suspended-dome structure, long axis 92m, short axle 73m, rise 6.5m, engineering construction height 24.5m.
The engineering constructed using the method for the present invention is safe and has favorably accomplished construction.It refines and summarizes through technology, into
Work(forms a set of oval suspended-dome structure construction method low, highly practical, safe to construction environment requirement.
In the present invention, the three dimensional adjustment device described in step 7 be Tianjin three build the homemade three-dimensional of construction engineering corporation can
The Simple And Practical device of adjusting, the basic realization method of the device are：By the use of U supports at the top of disk buckle type scaffold screw thread as rising
Decline adjustment, an I-steel (U holds in the palm spacing 1500m) is put in two U supports, four U supports laterally put two I-steel, two I-shapeds
Two I-steel (I-steel spacing 450mm) are put in longitudinal direction again on steel, topmost place steel plate, high 300mm pipes are placed on steel plate,
It is used to support solder sphere.Upper strata I-steel moves left and right the adjustment of realization left and right on lower floor's I-steel, and steel plate is in upper strata I-steel
Upper back-and-forth motion realizes front and rear adjustment, and then realizes three-dimensional adjustment.
In the present invention, the concrete operations of step 8 are to be stretched to design load from inner ring to outer ring from coil to coil using first
20%, then the 70% of design load is stretched to from outer ring to inner ring, 100% of design load is finally stretched to from inner ring to outer ring
Drawing order carries out tensioning.Use " inner ring to outer ring from coil to coil tensioning, then from outer ring to inner ring from coil to coil tensioning, then from inner ring to
Outer ring from coil to coil tensioning " method, be with the prior art (from outside to inside, from inside to outside then, then from outside to inside or from outside to inside, and
Afterwards from outside to inside, then from inside to outside the difference of the method for stretching in).With designing after the engineering tensioning according to said method constructed
Arch value only has the error of 8mm, it was demonstrated that the advance of this method.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (2)
1. a kind of construction method of ellipse suspended-dome structure, it is characterised in that：Including BIM three-dimensionals well known to construction industry
Technology, well known Midas softwares, Tekla softwares and three dimensional adjustment device in construction industry, the construction method, including following step
Suddenly：One) Pre-stressed pole check that frame body sets up collision with prestressed component using BIM technology, two) is determined using Midas softwares
The tensioning value and deformation values of part, three) using Tekla softwares to special-shaped rod piece accurate discharge, four) use disk buckle type scaffold conduct
Reticulated shell supporting frame, and prestress element installation is carried out, five) using cranking arm, lift truck carries out truss around as operating platform
Erecting and welding, six) use the small spelling of " splint " formula, " rice " word first closes up, by it is lower from upper subregion divide ring from coil to coil to single-layer lattice shell into
Aerial dissipate of row is spelled, seven) side of tensioning radial direction pull rod solder sphere point position is determined using total powerstation and three dimensional adjustment device, eight) is used
Formula carry out prestressed stretch-draw, arrive again from inside to outside in arrive again outer tension sequence and nine) use general displacement meter, vibratory string strain
Meter, magnetic flux transducer, total powerstation carry out comprehensive monitoring.
2. the construction method of ellipse suspended-dome structure according to claim 1, it is characterised in that：Described one) extremely
Nine) the step of, concrete operations are respectively：
One) BIM technology checks that frame body sets up the collision with prestressed component
Since prestressed component spatial attitude is in three dimensional arrangement, prestressed component will also move during prestressed stretch-draw, and using BIM
Technology sets up frame body before construction and prestressed component has carried out virtual collision inspection, it is determined that frame body sets up position, keeps away
Exempt from the interference of prestressed component and frame body in construction, it is ensured that stretching construction has certain shift length；
Two) Midas softwares determine the tensioning value and deformation values of prestress element
Prestressed stretch-draw process is emulated and calculated using Midas softwares, it is determined that tensioning step often walks tensioning value,
Reticulated shell deformation values are corresponded to after tensioning；
Three) Tekla softwares are to special-shaped rod piece accurate discharge
According to engineering modelling feature, each component differs in abnormity, size shape, and scene, which is cut, changes adjustment, and difficulty is quite big, uses
Tekla softwares carry out accurate calculation to all rod pieces and determine rod piece shape and size, and then factory's blanking makes shaping, ensures different
Type rod piece is precisely installed；
Four) supporting frame of the disk buckle type scaffold as reticulated shell, and carry out the installation of prestressed component
Since reticulated shell ball node absolute altitude is different, supporting frame top absolute altitude is inconsistent, and need to adjust repeatedly, selects disk button foot hand
Frame is as supporting frame, and the frame body stability is good, high capacity, high safety, and adjustment is flexible, strop, strut, pull rod peace
It is conveniently adjusted during dress, convenient operating space is brought for tensioning construction after adjustment；
Five) erecting and welding is carried out to truss around as operating platform using lift truck of cranking arm
Using lift truck of cranking arm as operating platform, truss around is installed, is welded, stretched flexible, easy to operate, truss
It installs, does not interfere with each other successively with ring bar, quick and safe；
Six) the small spelling of " splint " formula, " rice " word first close up, and from upper subregion ring from coil to coil are divided to carry out aerial scattered spelling to single-layer lattice shell by lower
Reticulated shell rod piece is in the small spelling of ground " splint " formula, tower crane lifting；Reticulated shell integrally carries out " rice " word along central axis and first closes up,
Then the assembled error of consumption is spelled by lower from upper point 8 10 rings of differentiation by dissipate aerial to single-layer lattice shell progress of ring；
Seven) total powerstation and three dimensional adjustment device determine solder sphere point position
Single-layer lattice shell solder sphere is installed, and using four measuring tables of high-altitude pre-production, total powerstation is placed on measuring table really
Determine solder sphere point position, three dimensional adjustment device Three Degree Of Freedom accurately adjusts solder sphere center and overlapped with measurement position；
Eight) carry out prestressed stretch-draw by the way of tensioning radial direction pull rod, arrive again from inside to outside in arrive outer tension sequence again
By Midas Software simulation calculations, the method for selecting tensioning " radial direction pull rod ", " based on control stretching force, malformation is
It is auxiliary " principle, the 20% of design load is stretched to from inner ring to outer ring from coil to coil using elder generation, then design load is stretched to from outer ring to inner ring
70%, be finally stretched to from inner ring to outer ring design load 100% tension sequence carry out tensioning；
Nine) general displacement meter, vibratory strain ga(u)ge, magnetic flux transducer, total powerstation carry out comprehensive monitoring
Stress and displacement are monitored during prestressed stretch-draw：Stress monitoring arranges 38 crucial monitoring points, uses
Vibratory strain ga(u)ge has carried out stress monitoring to reticulated shell, reinforcement truss, pull rod, strut, peripheral truss；Using magnetic flux transducer
Stress monitoring is carried out to drag-line to 3 rings；Displacement monitoring is divided into horizontal displacement and vertical displacement, arranges 25 crucial monitoring points,
Bearing horizontal displacement is monitored using general displacement meter, single-layer lattice shell vertical displacement is monitored using total powerstation, monitoring result meets
Specification and design requirement are satisfactory to complete construction.
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| CN108595800B (en) * | 2018-04-12 | 2022-02-11 | 中国电建集团贵阳勘测设计研究院有限公司 | Reticulated shell structure modeling method |
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| CN115030322B (en) * | 2022-06-24 | 2024-06-07 | 中建八局第二建设有限公司 | Dome steel structure integral lifting construction method |
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