CN105468796A - Method for establishing temporary support moulding bed system for steel structure assembly - Google Patents

Abstract

The invention provides a method for establishing a temporary support moulding bed system for steel structure assembly. The method comprises the following steps: establishing a three-dimensional simulation model of unit bodies needing to be assembled of a large steel structure via three-dimensional computer modeling software at first, and determining unit body assembly postures and assembly sections of the steel structure according to the simulation model, then, optimizing and establishing an assembly coordinate system according to the assembly postures of the unit bodies, outputting three-dimensional coordinate of each feature appearance control point of the structure to be assembled in the assembly coordinate system, and finally, designing the temporary support moulding bed system generating no mutual interference with unit body members according to the three-dimensional coordinate system and the unit body assembly postures of the steel structure. The method provided by the invention can be used for solving the problems of high assembly difficulty and high control precision of large space steel structures and particularly steel structures with complex space modeling, such as box-shaped curved steel structures and the like, reducing the height of a construction working plane in assembly construction, guaranteeing the assembly precision, reducing the working risk, improving the construction efficiency and predictability and maximally reducing auxiliary construction materials.

Description

A kind of method for building up of temporary supporting frame system assembled by steel structures

Technical field

The present invention relates to large stadium spatial steel structure system technical field of construction, especially relate to a kind of for Large Steel

The method for building up of the temporary support moulding bed system that construction cell cube is assembled.

Background technology

Along with the development of national economy, the large spaces such as more larger physical culture, leisure, exhibition, airport, hangar be built

Very vigorous with the demand of extra space buildings.This type of construction style is generally spatial steel structure, and structural shape can be divided into net

Frame (light steel), space truss (heavy steel) etc.These buildingss all have that span is large, moulding is unique usually, stressed complexity and have the features such as geographical indicator meaning after building up.After the appearance of this new type of construction of spatial steel structure, derive the construction method that some are novel immediately.According to composite factors such as integrally-built stressed and construction features, spot plane situation, site operation technical conditions and main equipment resources, generally can be divided into Assembly in pieces at height, subregion Method for Installation, whole hanging method, high-altitude planar slip method, Integral Lifting and integrated lifting.The choice of component on site construction method, all has a great impact engineering construction duration, quality safety, comprehensive cost.With regard to these installation methods, except Assembly in pieces at height, often kind of installation method all needs a last process and coordinates with it and just can complete, and this last process is exactly that structure is assembled.At present, increasing spatial steel structure is due to the needs of function and moulding, and the node of large amount of complex is designed in the middle of structure, therefore brings new challenge and problem to the construction stage.In order to reduce and simplify installation difficulty, reducing the work high above the ground in installing, assembledly develop into an independently critical process, the ease for operation of its precision controlling and scheme, become a deciding factor of installation success or not, especially have in unique spatial steel structure at some, assembledly play vital effect especially, directly affect progress and the quality of whole work progress.

Current assembling technique is substantially all adopt the method ensureing cell cube inside dimension, namely by the association size between each component of assembled cell cube, integral assembling precision is ensured, but it is any to the selection and comparison of assembled attitude, support jig system is also fairly simple, this method is only only applicable to advise positive version, to large space structure or special construction not too applicable.The appearance of more and more novel spatial steel structure pattern, such as large-scale bending space box shape steel structure or tube truss structure, the appearance profile control line major part of its component is irregular space polyline, the curvilinear equation that these curves are not fixed, and the direction that different segmental arc comprises angle is also constantly changing, the surface of component defines irregular bending face, outward appearance irregular, inside dimension is wayward, traditional construction method can not reach construction requirement, this just needs under the support of Computerized three-dimensional Simulation and Modeling Technology, set up accurately, the temporary support moulding bed system of safety, it is more reasonable to work out, the assembling method that precision is higher.

Summary of the invention

Technical matters to be solved by this invention is: utilize Computer Simulation modeling, assembled coordinate system optimization, determine rationally

Assembled attitude, and then provide a kind of for assembled large-scale or the assembled support jig system of special-shaped steel structure building unit body

Method for building up, can be set up by the method and be applicable to large stadium spatial steel structure, polymorphic structure, especially large-scale bending shape

The assembled support jig system of box spatial steel structure.

The present invention solves its technical matters and adopts following technical scheme: utilize Computerized three-dimensional modeling software, first set up the three-dimensional simulation model that large-scale steel structure needs assembled cell cube, and according to the assembled attitude of cell cube of this realistic model determination steel construction and assembled segmentation; Assembled coordinate system is set up again according to the assembled pose refinement of cell cube, export the three-dimensional coordinate at each characteristic look reference mark of structure to be assembled under this assembled coordinate system, the assembled attitude finally according to this three-dimensional coordinate system and steel construction cell cube designs the temporary support moulding bed system non-interference with cell cube component.

The present invention compared with prior art, has following major advantage:

The present invention can solve large space steel construction, and especially the steel construction of the spatial modelling complexity such as box bending shape is difficult

With assembled and that precision controlling is high problem, the height of operation side is reduced in assembling construction, ensure that splicing accuracy, reduce operating risk, improve operating efficiency, by the support system of Computerized three-dimensional simulation model design, what improve in construction is predictable, decreasing the auxiliary materials of construction to greatest extent; Utilize the measuring equipment of the advanced persons such as total powerstation, real-time monitored, projects reference mark in advance, makes component steady, safe, assembled to assigned address fast, decreases the operation that component adjusts repeatedly, accelerate project progress, and ensure that construction quality.In the assembling construction of the large space steel constructions such as stadiums, Convention and Exhibition Hall, airport, high-rise steel structure especially box bending shape labyrinth, adopt the method to construct, in quality, safety, cost control, there is significant effect, obvious economic benefit can be obtained.

Accompanying drawing explanation

Fig. 1 is temporary supporting frame system assembled scheme one.

Fig. 2 is temporary supporting frame system assembled scheme two.

Fig. 3 is temporary supporting frame system assembled scheme three.

Fig. 4 is a kind of complete layout of temporary supporting frame system assembled by steel structures.

Fig. 5 is steel construction cell cube assembled process flow diagram in temporary support moulding bed system.

To be that steel construction cell cube is assembled in temporary support moulding bed system complete figure to Fig. 6.

Fig. 7 is the coordinate system figure of steel construction cell cube primary design in-depth figure.

Fig. 8 is the assembled coordinate system optimization figure of steel construction cell cube secondary design in-depth figure.

In figure: 1. inner prop moulding bed; 2. the first column jacket moulding bed; 3. web member; 4. the first side column jacket; 5. the second side column jacket; 6. rhombus inner prop; 7. facade aggregated(particle) structure; 8. web member supports crane span structure; 9. the second column jacket moulding bed.

Embodiment

The present invention is to provide a kind of temporary support moulding bed Establishing method assembled for large-scale steel structure building unit body, the method is: utilize Computerized three-dimensional modeling software, first set up the three-dimensional simulation model that large-scale steel structure needs assembled cell cube, and according to the assembled attitude of cell cube of this realistic model determination steel construction and assembled segmentation; Assembled coordinate system is set up again according to the assembled pose refinement of cell cube, export the three-dimensional coordinate at each characteristic look reference mark of structure to be assembled under this assembled coordinate system, the assembled attitude finally according to this three-dimensional coordinate system and steel construction cell cube designs the temporary support moulding bed system non-interference with cell cube component.

The present invention adopts following methods to set up the three-dimensional simulation model of the assembled cell cube of large-scale steel structure, its step bag

Draw together:

1. deepen drawing, sets up space three-dimensional realistic model and the local detail model of buildings.

In Construction of Steel Structure industry, the field that three-dimensional artificial modeling is applied at present mainly concentrates in large span, baroque space structure, its main cause is the visual angle that its intuitive can give expression to plan view very easily and can not give expression to, and this point is absolutely necessary " introduction " means in the assembled of space structure and moulding bed support system process of establishing, because final moulding bed support system is set up need accessibility designs in a model.Set up one real, be the basis of all follow-up works close to the model that building is in kind.From 2 d-to-3 d to be a huge transition process be also one expend time in and the process of resource, should the applicable object of first Confirming model and stage before Modling model, so just can show emphatically main plant characteristic in the middle of the process of modeling, simpler non-key objects, greatly can improve the efficiency of modeling like this under the prerequisite not affecting final implementation result.Can be realized by following step from the foundation of three-dimensional simulation model:

The first step: about the preparation of architectural entity technical parameter;

Set up the starting point of solid model or motivation and usually may be summarized to be two large aspects, one is on the basis of any information in kind of the unknown, create out a brand-new entity, the main object of this type is design, research and development colony, brand-new entity is expressed by the realistic model set up, as the research and development of product, the initial design etc. of buildings.Two is carry out the conversion of two dimension to three-dimensional by known entity or blueprint, and namely utilize the physical dimension that in the design drawing of structure or in-depth figure, each sectional view is expressed to carry out Modling model, this form uses maximum a kind of modeling pattern in work progress.In whole modeling process, drawing is constantly reinterpreted as a kind of mode of descriptive model, show in face of people by the operation tool elephant of software, this kind of form is except requiring to possess the basic skills of operation modeling software, also need stronger spatial thinking ability and drawing reading ability, all information that drawing is expressed can be extracted accurately.In the assembled engineering of spatial steel structure, monomer model is the components three-dimensional volume coordinate or 2 d plane picture paper size that are provided by blueprint, CAD software (or other Engineering Modeling software) is utilized to change into the single-line model that can give expression to component outward appearance geometry, the model (non-physical) in this stage is except the mutual interference relation that intuitively can not give expression to component inside, be provided with geometry appearance structure accurately, for model entity provides foundation.Usually the modeling technique foundation provided in the construction blueprint of space structure is mostly the three dimensional space coordinate of the outward appearance monumented point of component, as the three-dimensional coordinate of four seamed edge lines of box-type member, the outward appearance point coordinate etc. of space frame; Do not provide the solid model of the large-scale steel structure of component outward appearance monumented point three-dimensional coordinate, then by going out outward appearance physical dimension and the relativeness of component expressed by different cut-open views (three-view diagram), the foundation for three-dimensional entity model provides parameter foundation.So being no matter the expression of 3 d space coordinate or traditional cut-open view (three-view diagram), is all the parameter foundation that three-dimensional simulation model is set up, from two-dimentional drawing, these important information can be extracted is important and necessary preparation in modeling early stage.Second step: select hardware and modeling software; Hardware: relative to two-dimensional graphics, solid modelling needs more computer resource.Internal memory and video memory even more important relative to processor speed, because low memory often causes the generation of bottleneck in system modelling rate process, the deficiency of video memory then can cause the model set up to occur showing phenomenon that is imperfect and dynamic observation picture clamping stagnation when entity display and blanking display operation, affects the observation that component interferes with each other.Because the model set up in engineering construction is all large complicated structure usually, thus also higher comparatively speaking to the requirement of internal memory and video memory, the best configuration of suggestion usually needs internal memory to reach more than 2GB, and independent video memory will reach more than 256MB.

Modeling software: in the selection of modeling software, mainly selects applicable, enough according to the requirement in engineering construction each stage

Mapping software.Except engineering contacting the most widely (being applicable to most of steel construction modeling) except AutoCAD, also has the outstanding modeling both domestic and external of a few money and Deepen Design software, as domestic Jian Ke institute PKPM series STS Steel Structural Design software, Tongji University 3D3S Steel Structural Design software; External StruCAD (exploitation of AceCcd company of Britain), Finland TeklaXsteel three-dimensional steel structural solid design system, these software mutual advantages, can set up out the three-dimensional for the construction stage

Model.

3rd step: the strategy determining modeling;

The Establishment strategy of three-dimensional entity model can be considered from both macro and micro two aspects:

Consider from macroscopic aspect: on a macroscopic level, because a large-scale space structure includes numerous systems, must there be individual macro-control generally the mutual structural relation of each system and geometric position before modeling, so that note the system interfered with each other in structure in modeling process, and consider the order that each system model is set up and type, make each system of block mold in geometrical construction, keep good connecting to greatest extent, plant characteristic keeps attribute one straightforward.The model of such foundation has more accuracy and specific aim in next step use, therefore at the modeling initial stage, want the global geometric shape of sufficient observation and analysis steel construction cell cube, the component be rationally split into, node complicated in cell cube is first independent, first start with from the most basic component, by simple to complicated, by local to overall, finally the node component of complexity is being embedded in block mold.

Consider from the aspect of microcosmic: on the aspect of microcosmic, be mainly concerned with some abnormity, the monomer of complex structure or

The model of parts is set up.Need some simple Object combination to become complex object on the one hand, on the other hand, also need a combination complex object being resolved to some simple bodies.The modeling strategy of this class model mainly embodies the operation thinking to 3 d modeling software.The geometrical property of analysis entities careful before modeling or the section of two-dimentional drawing represent, resolve into conventional solid correctly, cleverly by the entity of complexity and combine, determine that rational sequence of operation and thinking can play a multiplier effect.Especially the coordinate system of complex model operation interface is selected, the order of operation of Boolean calculation and combination, solid model the modeling method that often applies to such as cutting to go deep into take root in brains, constantly formed a kind of well, modeling thinking efficiently.

By the operation of above three large steps, basic just can set up out be suitable for, enough construction models, also be the continuous refinement to these three steps or repetition in most Practical Project operation, the three-dimensional simulation model set up so just can be used in each stage of spatial steel structure construction, as selected, contrast and the demonstration of: larger schemes; The assembled moulding bed design of large complicated cell cube; The suspension centre of large-scale combined cell cube is selected.

2. analyze building space structural shape and feature, reasonably determine assembled segmentation scheme and assembled attitude.

(1) determination of assembled attitude:

After three-dimension modeling gets up, just can observe out the geometry pattern of component intuitively, analytical structure is special

Point, several assembled attitude of general proposition compares, attitude more mainly in order to establish at follow-up moulding bed support system

Save moulding bed material in meter as far as possible, create larger economic benefit.

The principle that assembled attitude is selected and thinking are: make more component outward appearance plane parallel with assembled plane as far as possible; Component docking port as much as possible is reduced to ground location; Decision Components installation precision and outside docking port are reduced to ground location; Complex node as much as possible, large-scale overweight node are reduced to ground location; Utilize component self structure system to reduce temporary support moulding bed to greatest extent, reduce component gravity center; Assembled attitude should be connected with installation, avoids too much rotation and stands up; Assembled attitude will be beneficial to the observation of laying SURVEYING CONTROL NETWORK and outward appearance reference mark.

In early stage of assembling scheme in selection course, the selection of assembled attitude is particularly important, the method for operating that this step is usually unfixing, is belong to a kind of creationary thinking.If but act on above-mentioned several principles, and find this some general character point and equilibrium point as much as possible, just can make rationally, assembling scheme efficiently, and create favourable condition for the follow-up in-depth of scheme and the foundation of support jig system.

(2) determination of assembled segmentation:

Assembled segmentation mainly in order to meet in installation process under safe enabled condition, makes loop wheel machine reach to greatest extent

To fullcharging effect.Reduce high-altitude installation strength and reduce risk.The main principle of assembled segmentation is: when loop wheel machine performance meets, the assembled scope of the scattered component of expansion as much as possible; Extend toward surrounding symmetry with most complex node, ensure that the pattern of external mounting interface is simple, be convenient to overhead connection construction; Extend toward surrounding symmetry with the heaviest monomer members, ensure the lifting stable type of assembled cell cube.Extend to Accessory Members with main component, be beneficial to control that is assembled and installation accuracy.Make the cell cube of segmentation self can form firm structural system as much as possible under assembled attitude, reduce the dependence to temporary support moulding bed.The determination of assembled attitude and segmentation is the guiding principle of whole assembling scheme, is a kind of performing creative labour, plays a part conclusive guiding in spatial steel structure is assembled.

3. set up accurate, practical assembled coordinate system according to assembled attitude, under exporting this coordinate system, structure to be assembled is each

The three-dimensional coordinate at characteristic look reference mark.After assembled attitude is determined, start the stage entering substantial moulding bed support system conceptual design and in-depth.This one-phase is mainly and ensures that the precision controlling of assembled cell cube provides data foundation.Assembled attitude good for reasonable selection to be realized in practice of construction process, the component outward appearance locator data under this attitude must be obtained, these data can be the outline lines of component outward appearance, also can be the reference mark of adjacent members junction, that these locator datas will be specialized shows, then need assembled cell cube to be placed in the middle of a coordinate system artificially given, only in so specific coordinate system, the locator data obtained could with entity component mutual corresponding that is, the elements of a fix of component, be associated with the coordinate system giving it, have left coordinate system, data just do not have references object, it can only be insignificant numeral.So the determination of assembled coordinate system is the carrier of locator data.

The foundation of assembled coordinate system, in general further optimizes the assembled attitude selected or engineering number

According to process, generate assembled plane, the outward appearance reference mark coordinate of output link.

(1) assembled coordinate system is set up:

The determination of Y-axis: the monnolithic case symmetrical center line first determining an assembled cell cube length direction, as the longitudinal axis reference line (Y-axis) of two-dimensional coordinate system, in the irregular situation of assembled cell cube, this line also can be general center line, carries out Y-axis translation after can getting up at final establishment of coordinate system.Owing to being now carry out establishment of coordinate system according to the assembled attitude determined, be equivalent to set up a two-dimentional assembled plane in the below of assembled cell cube by Y-axis, X-axis, therefore, this straight line of Y-axis will be arranged on " below " of the assembled attitude of three-dimensional model on locus.

The determination of X-axis: after the Y-axis being arranged on three-dimensional model " below " is determined, then the X-axis of two-dimensional coordinate system is set.Its method is: in space, namely two intersecting straight lines can determine a plane, and therefore the determination of X-axis is the determination of final assembled plane.Because the selected of assembled attitude has an important condition precedent, be exactly make more component outward appearance plane parallel with assembled plane as far as possible, such object is convenient to arrange support jig to make whole cell cube have stronger relative stability, and be conducive to the operation of assembled counterpart and precision controlling.So, in most of the cases determine that assembled coordinate system X-axis needs the outward appearance plane of reference member, by doing the space vertical line of Y-axis in three dimensions, and vertical line is rotated to an angle around intersection point, the plane making it form is parallel to the outward appearance plane of cell cube bottommost component as far as possible, after being rotated in place, the plane of formation is the X-axis of the surface level of assembled attitude, transverse axis i.e. assembled coordinate system.

The determination of Z axis: after X-axis, Y-axis are determined, Z axis generates automatically, assembled three-dimensional system of coordinate is just set up.

What the method more than setting up coordinate system adopted is exactly that XY plane is set up as condition precedent.Various spatial steel structure assembled in, we also can run into the assembled cell cube of some particular appearance patterns, main component in cell cube or most of component need the state ensureing its Relative vertical in assembled process, therefore need in this case to take another to set up the method for coordinate system, namely the condition precedent utilizing Z axis preferential by the axial line of main component carries out the foundation of coordinate system, axial line along main component arranges the Z axis of assembled three-dimensional system of coordinate, then automatically XY plane is generated, again by rotating XY axle around Z axis, reach the requirement of assembled XY plane, final foundation completes assembled three-dimensional system of coordinate.

(2) assembled coordinate system is exported:

After assembled three-dimensional system of coordinate is set up, just translation X, Y, Z axis can be passed through, determine the position being conducive to the true origin that assembled coordinate exports most, usually true origin is arranged on the outside of assembled cell cube, and be not arranged on the inside of cell cube, such object is that the three-dimensional coordinate at each reference mark of output is only distributed in one or two coordinate quadrants, gets used to the data processing of engineering construction plane surveying.After above preliminary work all completes, preserve the coordinate system newly built up, just can export the three-dimensional coordinate at each reference mark, the method for output can utilize the orders such as the coordinate query facility inside modeling software, as the id command in CAD software.In the process that coordinate exports, all the time the initial point of model space coordinate system will be ensured to be locked on the initial point of newly-established coordinate system, namely in coordinate output procedure, all can only there be a unique reference origin at all reference mark, the reference mark three-dimensional coordinate that such guarantee exports can associate one by one with the coordinate system (i.e. newly-built coordinate system) of actual assembling construction, and finally can be reacted to really on component entity.

4., according to entity geometry pattern and the feature of space structure, design reasonable, non-interference temporary support moulding bed

System.

The assembled cell cube of spatial steel structure is drawn from independent part out from one-piece construction owing to being one, so himself does not possess complete supporting construction usually, the independent system of relative securement can not be formed, therefore, in most assembling construction process, all need to arrange interim support jig system, support system can be divided into two types substantially, one is planar support, namely the structural shape of assembled cell cube be one plane, the second not crossing on stereo directional with this plane structural plan, usually this support system is just arranged on the bottom of assembled cell cube, play the effect holding up component.Two are planes, vertically mix support, namely the structural shape of assembled cell cube is complicated and changeable, has two or more structural plan and intermeshes, and has internal rod diagonal cross to connect.The moulding bed design that this mixing supports just needs to consider moulding bed position, moulding bed

Interfere with each other with component, many-sided composite factor such as moulding bed reasonable layout.

Regardless of the moulding bed in assembled which kind of type of middle design, final purpose is all under the early stage meeting support unit body resistance to overturning, reduces the quantity of moulding bed as much as possible, its reason, and one is can create well-to-do construction space, convenient operation for assembling construction.Two is difficulty that the assembled cell cube of minimizing departs from moulding bed in a pre-installation.Three is save engineering to assist materials, is beneficial to project cost control.

The design of the assembled support jig system of spatial steel structure is all generally that the three-dimensional simulation model utilizing computing machine to set up has come, mainly because in three-dimensional simulation model, the parameter of model is all set up according to the physical size of assembled cell cube, the position that the moulding bed of design is residing in practice of construction and pattern can be reflected intuitively in the model space, moulding bed can be observed and component interferes situation (namely moulding bed and component are with or without colliding with each other) with or without profile.Therefore, in three-dimensional model space, directly carry out moulding bed design is the assembled indispensable technological means of spatial steel structure.

The general step of design support jig system is:

(1) structural shape of the assembled cell cube of observation analysis, determine that support jig system belongs to planar support type or plane, vertically mixes support type, according to the position of cell cube internals and spacing distance each other, rough make the scope and position that moulding bed should support.

(2) zero component composition of assembled cell cube is segmented, isolate main member, as the heaviest in weight, the component that node is maximum, extend outward using the docking port place of these components as emphasis Support Position, namely secondary member depends on the principle of main member, after emphasis Support Position is determined, analyze the interference member that can cause with or without other in the below of the strong point, if without other component interference, moulding bed can be set at this, if the below of the strong point has component to impact, then need under the prerequisite meeting upper support point, the position of fine setting support jig, or be designed to combined support moulding bed, upper and lower two parts are divided into by moulding bed, lower part escapes the component causing interference, upper part appoint ensure select the strong point immediately below, reaching can the firm support object that can prevent again component and moulding bed from interfering.

(3) arrange concrete Support Position and the quantity of moulding bed, ensure that component and moulding bed are without interference as far as possible, this stage mainly controls the quantity of moulding bed under the prerequisite ensureing the firm safety of support system, and moulding bed is arranged on the most effective position.In planar sheet Unit agent structure, substantially can consider the interference problem of moulding bed and component, because the bottom that moulding bed is substantially all arranged on assembled cell cube plays a supportive role.Quantity control can adopt the pattern of the little spelling in local (the scattered primary structural component being about to simple repetition is first combined into entirety and enters large cell cube again) reduce moulding bed consumption.In the multiaspect system Unit agent structure of complexity, usually many oblique pull rod members are had to be connected with main rod, especially in box-structure, the interface dimensions of these contact rod members is also very large, and form " cage " shape, therefore need first to determine that give prominence to or the most complicated monomer members is as the preferred location supported, by in three-dimensional entity model space, the model of moulding bed is set up, the position of continuous adjustment moulding bed, observation moulding bed and component interfere with each other situation, make moulding bed when a face through cell cube is gone to be supported on the component above this face as far as possible, phenomenon can not be touched with other component, this is even more important in the moulding bed design of mixing support system, what therefore moulding bed position was arranged is reasonable, assembled efficiency can be improved greatly, ensure the continuity of assembled process.

(4) moulding bed position then starts the structural shape selecting support jig after determining.Usually, in planar sheet Unit agent structure, select gate moulding bed rationally both economical, material adopts section steel manufacture substantially.The determination of moulding bed height is mainly determined according to the three-dimensional absolute altitude of the outward appearance of strong point place component, and in practical operation, the low 20 ~ 30mm of ratio component outward appearance absolute altitude that moulding bed height can be made, is finely tuned by bquster.In large complicated mixed structure cell cube, gate or box moulding bed can be adopted according to the weight of cell cube, the moulding bed of box or round section simplifies interface dimensions when load meets as far as possible, reduce the space taking cell cube inside, both avoided touching mutually with component, too increased the space of constructing operation.The determination of moulding bed height is also determine according to the outward appearance absolute altitude of strong point component, if the member section of component support place (component and moulding bed surface of contact) is not plane, also need, at moulding bed and member contact point place design transition bearing, supported weight to be delivered to moulding bed by bearing.The method for designing of transition bearing is: namely the top of bearing need the particular appearance shape according to component with the part of member contact

Formula is determined, as rhombus, triangle, circular prismatic component, the supporting surface that conversion bearing is in contact with it also should be made with component

The section form coincide, the bottom of bearing then needs to make the cross section matched with moulding bed end face, usually should be planar bottom surface.

After moulding bed is arranged and put in place in three-dimensional model space, for ease of construction, need the three-dimensional position of support jig system in assembled coordinate system to express by the mode of two-dimentional drawing.Starting point (namely the position coordinates of moulding bed will ensure incidence relation with assembled coordinate system) is located using assembled true origin as moulding bed system complete layout, in support jig system, the X of each moulding bed centralized positioning coordinate, Y value are as the size foundation in its two-dimentional drawing, the position of each support jig is drawn the floor plan forming moulding bed system, finally again according to the detail drawing of moulding bed modeling rendering for constructing; So far the foundation of temporary supporting frame system assembled by steel structures is completed.

5. set up SURVEYING CONTROL NETWORK according to assembled coordinate system and structure overall appearance size, throw and establish planimetric control point, make each outward appearance reference mark in assembled coordinate system and SURVEYING CONTROL NETWORK form Data Matching relation; Utilize the measurement point laid in SURVEYING CONTROL NETWORK to carry out precision observation, feedback modifiers data by total powerstation to assembling members, finely tune component accordingly and finally reach designing requirement precision.

Complete at assembled establishment of coordinate system, the three-dimensional coordinate at each reference mark of cell cube exports, after the making detail drawing of moulding bed and ground configuration figure complete, the assembled technical preparing work of spatial steel structure just completes substantially, starts to enter to measure and implements the preparatory stage.Measuring the object implementing the preparatory stage is need all component appearance data to be reflected within the scope of the Controling network of construction survey, and reach can direct observation component reference mark analyze the difference of its measured value and design load, feed back adjustment data, guide field assembling construction.This stage is mainly completed by step below:

(1) selection of surveying instrument, usually selects total powerstation as first-selected measuring instrument in the space structure construction of complexity

Device, it combines the function of electronic theodolite, level meter, stadimeter, and automaticity is high, has data acquisition, analyzes rapidly, the three-dimensional coordinate of Real-time Feedback measured point, precision high.

(2) with the surving coordinate system that assembled coordinate is according to setting up SURVEYING CONTROL NETWORK, making each outward appearance reference mark in assembled coordinate system and SURVEYING CONTROL NETWORK form the relation of Data Matching, building a station also directed closed.

(3) select the position of intervisibility to arrange Survey control point around platform for lining, interrelatedly form SURVEYING CONTROL NETWORK.The quantity at reference mark can be determined according to actual situations of construction, guarantees not blocked by other component or support jig in the scope of 360 degree.

(4) according to the three-dimensional coordinate at each reference mark, by the surveying instruments such as total powerstation the reference mark vertical projection of component on platform for lining, as box-type member can by two of its a lower surface angle point vertical projection on platform for lining, and paint and carry out mark, as the foundation of location, member planar direction, can in the speed of the elementary step raising component assembly of component assembly by this method, because each reference mark projected on platform for lining, in fact be exactly the vertical projection of this component outward appearance reference mark at XY coordinate surface, when component Primary Location, the simple instrument such as line can be utilized to hang down in conjunction with subpoint by component Primary Location to needing assembled position.The method is simple to operate, reaction is quick, can improve assembled efficiency to a great extent, and reaches the accuracy requirement (now component can be navigated within the 5mm of design con-trol position) of component Primary Location.

(5) the space absolute altitude at reference mark can be determined by total powerstation in the lump when projection planimetric position, reference mark, absolute altitude initial value is just the relative elevation of ground point in surving coordinate system of reference mark projection place, by the calculating with coordinate origin absolute altitude, just can show that this reference mark needs the actual elevation controlled at its plane projection point place.The actual elevation that construction teams and groups just can control as required, adjusts component absolute altitude direction to the right place.This method be equivalent to measure disposable by the X at reference mark to, Y-direction, Z-direction be all reflected on platform for lining, do not need real-time monitored and tracking observation, be used for the spatial steel structure of structural shape comparison rule assembled in.When Unit agent structure pattern more complicated or abnormal shape, the observation procedure that usual employing precision controlling is higher, project to the reference mark on ground only as the foundation that component is tentatively in place, when component according to subpoint preliminary in place after (now component can be navigated within the 5mm of design con-trol position), adopt total powerstation outward appearance reference mark by prism real-time monitored component in Controling network, its actual three-dimensional coordinate data of Real-time Feedback, constantly with the comparison of design coordinate,

Go out to need the concrete data-guiding site operation in X, Y, Z-direction adjustment.

Survey control is a step the most key in the assembled process of spatial steel structure, the construction quality that direct impact is assembled and progress, measuring accuracy is controlled, the assembled quality of component has just had guarantee on source, by above-mentioned five steps, can be accurate, complete the Survey control of most of complex space steel construction efficiently.

6. directly perceived according to the assembled sequential organization of cell cube, accurate operation scheme guide field construction.

For spatial steel structure, because its number of components is many, complex structure is changeable, therefore, will conceive the assembled order of whole cell cube before assembling construction, and has the construction operation scheme guiding construction of directiveness according to assembled thinking establishment.Space structure has contour structures complexity usually, the feature that node is many, its drawing mark also adopts the mode of coordinate to express mostly, and the scheme of common two dimension view just seems more difficult at the position relationship of expression of space entity, is difficult to the relative position relation showing each component intuitively.Therefore, in large complicated spatial steel structure assembling construction, usually all adopt model entity figure that computing machine is set up to work out arrangement and method for construction, establishment arrangement and method for construction is out simple and clear like this, accelerate the understanding of work layer to drawing greatly, improve assembled efficiency.The establishment of concrete operation scheme can be completed by following steps:

(1) the cell cube three-dimensional model established is convenient to distinguish according to the color that each zero component mark is different.

(2) component of support jig and different assembled order is placed in different layer respectively and is convenient to display and control,

All component layer are all hiding, retain the display of moulding bed layer.

(3) according to constructing, thinking is sequenced opens corresponding component layer, is used for representing assembled order, and by this step

Assembled attitude when completing exports the form of picture, is convenient to work out operation scheme.

(4) by after assembled attitude picture in steps exports, then edit the pass in caption information and assembled process

Key technology quality requirements, the consolidation service scheme that final formation is complete, issues work layer for construction.Below in conjunction with accompanying drawing, the present invention is described in further detail.

1. deepen drawing, sets up space three-dimensional realistic model and the local detail model of buildings.

Large-scale steel structure has the node of more complicated usually, also has some to have the component of bending shape, to its construction mold

Have larger difficulty, wherein most is representational is composite roof truss post (Fig. 3), and this pillar is primarily of five part compositions: rhombus inner prop 6, first side column jacket 4, second side column jacket 5, web member 3, facade aggregated(particle) structure 7.Bending section and the bracket that rhombus inner prop is connected with web member of what wherein modeling was the most complicated is the first side column jacket 4 and the second side column jacket 5.The order of this composite roof truss post modeling is: the first side column jacket 4, second side column jacket 5, rhombus inner prop 6, facade aggregated(particle) structure 7 and web member 3.Bracket on rhombus inner prop is complex node, is to be embedded in block mold after being completed by Independent modeling again.The concrete grammar of modeling is: straight section component (as column jacket, inner prop, web member) is all box-structure, cross section is quadrilateral, point (reference mark) on each summit all has the 3 d space coordinate of relative position, these coordinates can be directly utilized to be located at component reference mark in CAD, each reference mark coupled together with straight line the outward appearance geometry borderline just defining component again, carry out hypostazation operation (territory, face in CAD, entity orders) again according to these outline lines, just can obtain the solid model of component.Bending Duan Ze in first side column jacket 4 and the second side column jacket 5 carries out modeling by independent for each bending section, because each bar crest line of bending section has independently relative coordinate the form of crest line polyline to be expressed, therefore can utilize these independently coordinate carry out the modeling of bending section, can obtain its skeleton pattern like this, bending segment model is carried out hypostazation by the CAD operational orders such as recycling curved surface.Finally the independent monomer members model group set up is incorporated into the model just completing composite roof truss post in the block mold of truss leg to set up.Its version can reflect intuitively, can also be carried out the observation in 360 degree, space in modeling software by orders such as dynamic rotaries to this assembled cell cube.For supporting that the design of moulding bed system provides indispensable basic condition.

2. analyze assembled cellular construction pattern with three-dimensional model, determine assembling scheme and support jig system scheme.

A composite roof truss post is made up of many loose mails (this example is 60 more than one piece), these loose mails be fitted together,

A kind of reasonable, practical and efficient assembling method must be selected.During preparation of construction, tentatively draft three kinds of schemes and carried out

Relatively.

Scheme one: rhombus inner prop 6 downward horizontal places assembled moulding bed design diagram (Fig. 1), and we have carried out assembled demonstration to scheme one in the solid model of composite roof truss post, can be found by the intuitive of three-dimensional model, although this scheme rhombus inner prop is positioned horizontally and is overhead not highly conducive to the assembled of inner prop, but the section attitude of its box column jacket has reversed certain angle, be aloft not easy to accurately control and accurate adjustment.And the column jacket strong point forms obstacle to the installation of web member too much, auxiliary material consumption is large.

Scheme two: rhombus inner prop 6 upwards horizontal positioned assembled moulding bed design diagram (Fig. 2) scheme two is assembled in order to ensure the level of rhombus inner prop, both sides column jacket is crossed be above the ground level, most of operations to be transformed into aerial, add potential safety hazard, and the web member between inner prop and column jacket needs embedding shelves to install, lack the strong point and job platform aloft, bring inconvenience to assembled.Its support jig One's name is legion, auxiliary material consumption is large.

Scheme three: box column jacket downward horizontal places assembled moulding bed design diagram (Fig. 3)

Two box column jackets (the first side column jacket 4, second side column jacket 5) are placed level with ground level by this scheme substantially, this

The materials of sample both sides column jacket moulding bed can reduce greatly, and main construction materials concentrate on the inner prop moulding bed 1 of rhombus inner prop.

Column jacket moulding bed comprises the first column jacket moulding bed 2 and the second column jacket moulding bed 9 (Fig. 4), and their structure is identical, just highly different;

They are by H profile steel or lattice square set composition; In order to make figure clear, they have employed simplification drawing form at Fig. 1-Fig. 3, Fig. 5-Fig. 6.Facade aggregated(particle) structure 7 and two column jackets of outer intercolumniation are all carry out assembled operation in overhead not high plane, reduce operation easier and potential safety hazard, are convenient to splicing accuracy and control and fine setting.The web member between two inner prop moulding beds can be utilized to support crane span structure 8 to carry out temporary support during the web member 3 of assembled column jacket and interior intercolumniation, and as operating platform that is assembled, welding.By comparing the demonstration of these three kinds of assembling schemes in the three-dimensional model, can find out that scheme three has the advantage of convenient operation, high, the auxiliary material less investment of safety coefficient very intuitively, therefore this scheme also finally becomes to be chosen to be the construction of composite roof truss post

Scheme.

3. after determining assembled attitude, set up and optimize assembled coordinate system, exporting each outward appearance reference mark coordinate.

After the assembling scheme of this engineering is tentatively selected, the establishment of coordinate system of primary design in-depth figure is only suitable for installing and being not suitable for assembled (Fig. 7), because the coordinate system installed positions component according to the space mounting position of all components, but actual assembled work can not be carried out putting according to the Installation posture of component assembled, but the establishment of new coordinate system to be carried out according to selected optimization assembling scheme, the center of gravity that ensureing tries one's best reduces integrated member and the principle that column jacket keeps flat.

Coordinate system after optimization is not absolute by former coordinate system 90-degree rotation, but the principle kept flat with reference to the center of gravity and column jacket that reduce integrated member as far as possible and select (Fig. 8), by defeated for each assembled reference mark of component under the coordinate system selected

Go out, recycling TCA1800 type total powerstation arranges SURVEYING CONTROL NETWORK around component, by scene, three-dimensional coordinate collection is carried out to assembled reference mark, with the three-dimensional coordinate check analysis of deriving under assembled coordinate system, the error in point measurement of each character control point relative theory coordinate can be drawn, and then instruct operating personnel to adjust component, until reach designing requirement.

In the collection analysis process of assembled reference mark data at the scene, what select at first is the industrial 3 D Coordinate Measuring System software of MertoIn and online detection component being carried out to assembled reference mark of total powerstation that Institute of Surveying and Mapping of information engineering university of PLA develops, although this software is powerful in field of industrial measurement, but in the characteristic for this engineering, information feedback period is long, SURVEYING CONTROL NETWORK arranges complexity, the factors such as the Gesture uniqueness that component is placed is constrained to the project progress at assembled scene.And XZ plane is parallel to the ground in the coordinate system optimized, Z value is endowed as the distance on component length direction, X value is given as component is relative to true origin left and right displacement, and Y value is endowed as member in critical point is relative to the absolute altitude (Fig. 4, Fig. 8) of XZ plane.According to this feature when not utilizing other professional software, irregular three-dimensional space measurement is converted into plane, level measurement intuitively.In coordinate system SURVEYING CONTROL NETWORK after optimization, utilize total powerstation just can collect intuitively efficiently, directly can carry out the reference mark data of analysis and guidance construction.

4. in assembled coordinate system according to cell cube type of design support jig system, by assembled thinking establishment consolidation service scheme.

Control in assembled flow process, is establish three-dimensional simulation model by computing machine in advance, and carries out in a model

Accessible moulding bed design, will carry out moulding bed design mainly because its moulding of composite roof truss post is triangle radiation in solid model

Caged with a large amount of bending parts, its assembled support jig needs to arrange in the staggered internal rod of complexity, and will examine

Consider to the interference situation with these rod members, make feasibility, security height assembling scheme after being demonstrated by computer simulation, institute

These work 3D solid realistic model set up that all must place one's entire reliance upon is had to realize.

Specific construction step is as Fig. 4-Fig. 6;

Step one: by the support jig of accessibility designs in three-dimensional model space, this support jig need consider and

The interference member dodged is: moulding bed and aggregated(particle) structure can not be interfered in surface level direction; Moulding bed and web member can not in locus

Interfere; Moulding bed and rhombus inner prop can not be interfered in the vertical direction.By in composite roof truss post solid model repeatedly by avoiding doing

The principle related to is selected in the position of XY planar movement moulding bed.After the position that moulding bed is arranged meets above-mentioned three principles,

Moulding bed is positioned, and draws moulding bed floor plan according to its position in assembled coordinate system and be used for moulding bed and install, then

Moulding bed is arranged according to arrangenent diagram.Support the moulding bed of first, second side column jacket owing to needing the overall height of C.G. of control module body,

What adopt is the H profile steel that 600mm is high, so just most assembled, welding job face has been reduced to about 1.5m, constructability (Fig. 5).H profile steel top arranges adjustment bearing according to the outward appearance surface of contact of box-type member again, can be adjusted the absolute altitude of the first side column jacket 4 and the second side column jacket 5 by bquster.

Step 2: the first side column jacket 4 and the lifting of the second side column jacket 5 are put in place according to assembled order, basis in installation process

The planimetric control point being incident upon ground comes control member position in the horizontal direction, more real-time in assembled process by total powerstation

Observation, feedback correlation data, then fine setting puts (as Fig. 5) in place.In the column jacket of bending section, the external interface be associated due to it is many, employing be also real-time monitored, continuous feedback adjusting data, finally reach designing requirement.

Step 3: the first side column jacket 4 and the second side column jacket 5 in place after, recharge the facade aggregated(particle) structure between column jacket

7 (as Fig. 5).

Step 4: install web member 3 after facade aggregated(particle) structure 7 puts in place, web member adopts clamp to add the mode of temporary support, bending

Section web member is supported on the horizontal support crane span structure 8 between two inner prop moulding beds (as Fig. 5).

Step 5: lifting rhombus inner prop 6, this inner prop is the key member of whole composite roof truss post, and weight is large, and bracket saves

Point is many, is also interspersed with stair stringer with bracket and passes through mutually, and splicing accuracy requirement is high.The moulding bed supporting rhombus inner prop 6 is inner prop moulding bed 1,

What inner prop moulding bed 1 adopted is the square set of lattice, is provided with special inner prop between this support and component outward appearance supporting surface

Bearing, interior pillar support adopts the V-type clamp meeting rhombus inner prop outward appearance cross section, and this clamp is placed between inner prop bearing draw-in groove, can regulate the displacement and the absolute altitude that control support rhombus inner prop 6 up and down.Rhombus inner prop 6 is lifted on inner prop moulding bed 1 by drawing segmentation successively, for the ease of supporting, the bracket of rhombus inner prop and web member 3 are not collided with inner prop moulding bed 1, can by two joint inner props first little be combined into the rhombus inner prop 6 be integrated after again entirety hang on (as Fig. 6) on inner prop moulding bed 1, finally form spatial stability system.

Claims (7)

1. the method for building up of a temporary supporting frame system assembled by steel structures, it is characterized in that a kind of temporary support moulding bed Establishing method assembled for large-scale steel structure building unit body, the method is: utilize Computerized three-dimensional modeling software, first set up the three-dimensional simulation model that large-scale steel structure needs assembled cell cube, and according to the assembled attitude of cell cube of this realistic model determination steel construction and assembled segmentation, assembled coordinate system is set up again according to the assembled pose refinement of cell cube, export the three-dimensional coordinate at each characteristic look reference mark of structure to be assembled under this assembled coordinate system, the assembled attitude finally according to this three-dimensional coordinate system and steel construction cell cube designs the temporary support moulding bed system non-interference with cell cube component, following methods is specifically adopted to set up the three-dimensional simulation model of the assembled cell cube of large-scale steel structure, its step comprises: the first step, preparation about architectural entity technical parameter: the entity of known large-scale steel structure or construction blueprint are carried out the conversion of two dimension to three-dimensional, wherein: the modeling technique provided in the construction blueprint of large-scale steel structure is according to the three dimensional space coordinate of the outward appearance monumented point for component, the entity not providing the large-scale steel structure of component outward appearance monumented point three-dimensional coordinate then provides modeling parameters foundation by going out the foundation that the outward appearance physical dimension of component and relativeness are three-dimensional entity model expressed by different cut-open views, the expression of three dimensional space coordinate and cut-open view is all the parameter foundation that three-dimensional simulation model is set up, and from two-dimentional drawing, these important information can be extracted is important and necessary preparation in modeling early stage,

Second step, select hardware and modeling software: hardware: relative to two-dimensional graphics, the solid modelling of large-scale steel structure needs more computer resource, wherein, internal memory needs more than 2G, independent video memory needs more than 256M, modeling software: the requirement according to engineering construction each stage adopts suitable mapping software, it comprises AutoCAD, domestic Jian Ke institute PKPM series STS Steel Structural Design software, Tongji University 3D3S Steel Structural Design software, the StruCAD of Britain, Finland TeklaXsteel three-dimensional steel structural solid design software, they can set up out the three-dimensional model for the construction stage,

3rd step, the determination of modeling strategy: consider from macroscopic aspect: note the system interfered with each other in large-scale steel structure modeling process, and consider the order that each system model is set up and type, make each system of block mold in geometrical construction, keep good connecting to greatest extent, plant characteristic keeps Attribute consistency, the model of such foundation has more accuracy and specific aim in next step use, considers from the aspect of microcosmic: be mainly concerned with some abnormity, the model of the monomer of complex structure or parts sets up; The geometrical property of analysis entities careful before modeling or the section of two-dimentional drawing represent, resolve into conventional solid correctly, cleverly by the entity of complexity and combine, determine that rational sequence of operation and thinking can play a multiplier effect; Especially the coordinate system of complex model operation interface is selected, the order of operation of Boolean calculation and combination, solid model the modeling method that often applies to of cutting to go deep into take root in brains, constantly formed a kind of well, modeling thinking efficiently; By the operation of above three steps, complete the foundation of described three-dimensional simulation model.

2. the method for building up of temporary supporting frame system assembled by steel structures according to claim 1, it is characterized in that after three-dimensional simulation model is set up, adopt following methods to determine assembled attitude and assembled segmentation, set up assembled coordinate system to optimize, export each component outward appearance reference mark coordinate;

(1) determination of assembled attitude:

Its method is: make the outward appearance plane of component parallel with assembled plane as far as possible, and reduce its height of C.G.; The inside of component and outside docking port are reduced to ground location; Complex node as much as possible, large-scale overweight node are reduced to ground location; Utilize component self structure system to reduce temporary support moulding bed to greatest extent, reduce component gravity center; Assembled attitude should be connected with installation, avoids too much rotation and stands up; Assembled attitude will be beneficial to the observation of laying SURVEYING CONTROL NETWORK and outward appearance reference mark, above some be the guidance program that spatial steel structure assembling scheme is formed early stage;

(2) assembled segmentation:

The main method of segmentation is: when loop wheel machine performance meets, the assembled scope of the scattered component of expansion as much as possible;

Extend toward surrounding symmetry with most complex node, ensure that the pattern of external mounting interface is simple, be convenient to overhead connection construction; Extend toward surrounding symmetry with the heaviest monomer members, ensure the lifting stable type of assembled cell cube; Extend to Accessory Members with main component, be beneficial to control that is assembled and installation accuracy; Make the cell cube of segmentation self can form firm structural system as much as possible under assembled attitude, reduce the dependence to temporary support moulding bed.

3. the method for building up of temporary supporting frame system assembled by steel structures according to claim 1, after it is characterized in that assembled attitude is determined, adopts the method establishment of following steps and exports assembled coordinate system:

(1) assembled coordinate system is set up:

First determine the Y-axis of a length direction monnolithic case symmetrical center line as two-dimensional coordinate system of assembled cell cube, this center line need not to be definitely arranged in assembled cell cube in the heart, only need according to this cell cube exact shape situation probably between two parties, then the space vertical line of Y-axis is done in three dimensions, and this vertical line is rotated around intersection point the outward appearance plane that the plane making it form is parallel to assembled cell cube bottommost component as far as possible, after being rotated in place, the plane formed is the XY plane of assembled attitude, and described space vertical line is exactly the X-axis of assembled coordinate system; After X-axis, Y-axis are determined, Z axis generates automatically, and so far assembled coordinate system is just set up;

(2) assembled coordinate system is exported:

After assembled establishment of coordinate system, by translation X, Y, Z axis, just determine the position being beneficial to the true origin that assembled coordinate system exports, usually true origin is arranged on the outside of assembled cell cube, and be not arranged on the inside of cell cube, so just make the X of each characteristic look reference mark three-dimensional coordinate of the component to be assembled of output, Y value is only distributed in one or two coordinate quadrants, get used to the data processing of engineering construction plane surveying; After above preliminary work all completes, keep newly-built coordinate system, this coordinate system is the coordinate system of actual assembling construction; Then the three-dimensional coordinate of each outer viewpoint of coordinate querying command output link inside modeling software is utilized, in the process exported, need all the time the initial point of three-dimensional coordinate to be locked on the initial point of newly-built coordinate system, to ensure that the three-dimensional coordinate exported associates one by one with the coordinate system of actual assembling construction, and be finally reacted to really on component entity.

4. the method for building up of temporary supporting frame system assembled by steel structures according to claim 3, is characterized in that in the process setting up assembled coordinate system, if when assembled cell cube is irregular, this line of Y-axis is start reference line, due to be now according to

The assembled attitude determined carries out establishment of coordinate system, is equivalent to set up a two-dimentional assembled plane in the below of assembled cell cube by Y-axis, X-axis, and therefore, this straight line of Y-axis wants translation in the below of assembled cell cube on locus.

5. the method for building up of temporary supporting frame system assembled by steel structures according to claim 3, is characterized in that in foundation

In the process of assembled coordinate system, the in place of each component is that control subpoint by projecting ground controls in XY plane, and the trimming precision needed time in place controls and the control of Z-direction is controlled by total powerstation real-time monitored feedback data.

6. the method for building up of temporary supporting frame system assembled by steel structures according to claim 3, it is characterized in that in the process setting up assembled coordinate system, if run into the assembled cell cube of some particular appearance patterns, when main component in this cell cube or most component need to ensure the state of its Relative vertical in assembled process, another should be taked to set up the method for coordinate system, that is: the condition precedent utilizing Z axis preferential by the axial line of main component carries out the foundation of assembled coordinate system, axial line along main component arranges the Z axis of assembled coordinate system, then automatically XY plane is generated, again by rotating XY axle around Z axis, reach the requirement of assembled XY plane, finally complete the foundation of assembled three-dimensional system of coordinate.

7. the method for building up of temporary supporting frame system assembled by steel structures according to claim 1, is characterized in that the entity geometry pattern according to spatial steel structure and feature, adopts the method design of following steps to go out described temporary support moulding bed system:

(1) analyze assembled cell cube: determine that temporary support moulding bed system belongs to planar support type, or plane, vertically mix support type, to make the scope and position that described moulding bed system should support;

(2) segment assembled cell cube: isolate main member, comprise the component that weight is the heaviest, node is maximum, extend outward using the docking port place of these components as emphasis Support Position, namely secondary member depends on the principle of main member;

(3) establish concrete Support Position and the quantity of described moulding bed system: ensure that component and moulding bed system are without interference as far as possible, this stage is mainly ensureing the quantity controlling moulding bed under the firm safe prerequisite of moulding bed system, and moulding bed is arranged on the most effective position, in planar sheet Unit agent structure, substantially need not consider the interference problem of moulding bed and component, on quantity controls, adopt the pattern of the little spelling in local, the scattered primary structural component being about to simple repetition is first combined into entirety and enters large cell cube again, reduce moulding bed consumption, in the multiaspect system Unit agent structure of complexity, first determine that give prominence to or the most complicated monomer members is as the preferred location supported, by in three-dimensional entity model space, the model of moulding bed is set up, the position of continuous adjustment moulding bed, observation moulding bed and component interfere with each other situation, make moulding bed when a structural plane through cell cube goes to be supported on the component above this structural plane as far as possible, phenomenon can not be touched with other component, this is even more important in the moulding bed design of mixing support system,

(4) structural shape of described moulding bed system is established:

Planar sheet cell cube adopts gate moulding bed, and this moulding bed is substantially by section steel manufacture; Moulding bed height is according to strong point place component

The three-dimensional absolute altitude of outward appearance determine, in practical operation, moulding bed height 20 ~ 30mm lower than component outward appearance absolute altitude, finely tuned by bquster, large complicated mixed structure cell cube adopts gate or box moulding bed, and the moulding bed of box-type section simplifies interface dimensions when load meets as far as possible, reduces the space taking cell cube inside, both avoided touching mutually with component, too increased the space of constructing operation; Moulding bed height is determined according to the outward appearance absolute altitude of strong point component, if the vertical cross-section of component support place is not plane, also needs, at moulding bed and member contact point place design transition bearing, supported weight to be delivered to moulding bed by bearing;

(5) layout of described moulding bed system: after support jig layout being put in place in assembled unit model space by above-mentioned four steps, for ease of construction, need the three-dimensional position of support jig system in assembled coordinate system to express by the mode of two-dimentional drawing: locate starting point using assembled true origin as moulding bed system integral arrangement, the X of each moulding bed centralized positioning coordinate in support jig system, Y value is as the size foundation in its two-dimentional drawing, the position of each support jig is drawn the floor plan forming moulding bed system, last again according to the detail drawing of moulding bed modeling rendering for constructing, so far the foundation of temporary supporting frame system assembled by steel structures is completed.