CN105019557A - Flying-wing-type formwork space truss structure and construction method thereof - Google Patents
Flying-wing-type formwork space truss structure and construction method thereof Download PDFInfo
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Abstract
The invention belongs to the field of steel structure construction, and particularly discloses a flying-wing-type formwork space truss structure and a construction method thereof. The flying-wing-type formwork space truss structure comprises main trusses, auxiliary trusses and parallel chord member trusses. The main trusses, the auxiliary trusses and the parallel chord member trusses are welded and fixedly connected to form a formwork space truss structure body. The flying-wing-type formwork space truss structure further comprises flying-wing-type trusses located above the formwork space truss structure body. The flying-wing-type trusses are connected with the auxiliary trusses of the formwork space truss structure body through draglines. The invention further discloses the construction method of the flying-wing-type formwork space truss structure. The construction method includes the construction steps of support installing, main truss installing, hemisphere auxiliary truss installing, steel dragline constructing and the like. By means of the flying-wing-type formwork space truss structure, a whole structure is more stable, a chain block and a wall pulley are matched to carry out steel structure installing and steel dragline tensioning, the construction method is simple, the number of adopted machines is small, the site safety is guaranteed, the construction quality is also guaranteed, and the construction cost is greatly reduced.
Description
Technical field
The invention belongs to field of steel structure construction, be specially all-wing aircraft pattern shell-space trussed construction and construction method thereof.
Background technology
It is high that steel work has intensity, from heavy and light, speed of application is fast, anti-seismic performance good, energy-conserving and environment-protective and industrialization degree advantages of higher, therefore it becomes one of China's key popularized project, and corresponding steel cable have also been obtained and applies widely in Large Span Spatial Truss.
Along with the continuous progress of society and people also require more and more higher to functional building, not only require that public building has beautiful outward appearance, meet using function and safety and stability again, common firm form of structure and construction method can not meet the needs of engineering construction.
Summary of the invention
For the actual needs that steel work is built, the invention provides a kind of new steel structure form, meet the requirement of people to practicality and perfect tube exterior and safety.
Concrete scheme is: all-wing aircraft pattern shell-space trussed construction comprises main couple, jack truss and parallel-chord truss, main couple, jack truss are welded to each other with parallel-chord truss and are fixedly connected with, form " hemispherical " formwork space trussed construction, described trussed construction also comprises " arc-shaped " all-wing aircraft type truss be positioned on formwork space trussed construction, all-wing aircraft type truss is connected by the jack truss of drag-line with formwork space trussed construction, and two arc ends of all-wing aircraft type truss are fixed on bearing.
Further, between main couple and parallel-chord truss, be provided with the jack truss that many Pin are parallel to each other, be connected with between jack truss and link bar, link the upper chord of bar perpendicular to jack truss, and be welded to connect with jack truss upper chord.
Further, described main couple and parallel-chord truss are provided with parallel with the upper chord of jack truss, the support bar vertical with linking bar; The upper chord of support bar and main couple and parallel-chord truss is welded to connect, and links bar and is welded to connect.
Further, described jack truss comprises jack truss upper chord, jack truss lower chord, and jack truss upper chord and main couple upper chord and parallel-chord truss upper chord are welded to connect, and jack truss lower chord and main couple lower chord and parallel-chord truss lower chord are welded to connect.
Further, described drag-line upper end is connected on all-wing aircraft type truss lower chord, and drag-line lower end is connected to jack truss upper chord and links on the crosspoint of bar.
Further, described main couple is fixedly connected with all-wing aircraft type truss base with main couple base respectively by spherical bearing with the two ends of all-wing aircraft type truss; The parallel-chord truss chord member of parallel-chord truss is welded with spherical bearing, and spherical bearing is fixedly connected with parallel-chord truss base.
Further, drag-line is the steel tendon drag-line that 1670 grades of high tensile steel wires are made, and diameter is
22mm.
The invention also discloses all-wing aircraft pattern shell-space trussed construction construction method, comprise following construction sequence:
The first step, bearing is installed: utilize the method for Digital Three-Dimensional modeling to be three-dimensional model diagram intuitively by Node, can according to axis of putting, absolute altitude on embedded part from model, then is converted in on-the-spot practice of construction and is positioned by bearing;
Second step, main couple is installed: set up scaffold and carry out support main couple, and ensure globality and the stability of scaffold, horizontal cross brace 3 road set up by scaffold, and outside support body, scissors fully supports and establishes; The main couple mobile crane 4 spliced is installed, middle part adopts scaffold to support, two ends are connected with bearing, adopt ground to throw collimation method and control main couple axis, treat 3 in place after with wire rope and Chain block, oblique pull location, side is carried out to main couple;
3rd step, hemisphere jack truss is installed: jack truss adopts steel-pipe welding to form, 2 liftings are adopted in jack truss installation process, setting angle is adjusted with Chain block, top is docked with main couple node, bottom steelframe ball is connected with bearing, and main couple and jack truss connecting portion adopt scaffold building operating platform, ensures the safety of constructor;
4th step, steel cable is constructed:
1) early-stage preparations
Scene before drag-line construction prepares: parts are after transporting to job site, stack neat by number, lower chock a tree, used in making timber for boats, site requirements is neatly smooth, and take fire prevention, rainproof, damp proof safeguard measure checks dragline anchorage, whether PE sheath has damage, eliminate burr near drag-line if any revising immediately or repair, avoid injury protection cover;
2) hanging cable
Upper end drag-line is fixed, utilize the scaffold installing main couple as operating platform, mobile crane is utilized to be sling by drag-line fixed end in cooperation, hoisting point position should meet the slightly sagging required length in ground tackle upper end, on truss, node installation personnel adopt the instruments such as Chain block and fiber hanging belt manually to wear axle to be connected at scaffold operating platform, and the upper node of drag-line installs;
Lower node drag-line is installed, at lower node far-end, pulley is set, utilize and manually coordinate jack to be drawn to installation site drag-line lower end, during traction, colligation point should ensure that there is certain oscillating quantity ground tackle end, tackle drag-line in distraction procedure strictly to protect, avoid cable body and ground tackle screw thread impaired, and the torsion situation of the every root drag-line of close inspection in position installation process when in time adjustment drag-line is unsettled, prevents drag-line from reversing with node and is connected;
3) stretch-draw: the determination of stretching plan, selecting of tensioning equipment, concrete stretching plan;
4) cable wire regulates: adjust Suo Caiyong torque spanner to control, and by setting wrenching torque, tightens after locking Suo Li to sleeve; Torque spanner is utilized to carry out Suo Li loading to every root cable wire successively.
Beneficial effect: the every part of truss is coupled together by solder sphere, and form two hemisphere, in order to ensure stability and the steadiness of two hemisphere, each hemisphere is increased an all-wing aircraft type truss and coupled together by the truss of drag-line and hemisphere.Make total more stable.The machinery adopting Chain block and chest expander to coordinate and carry out Steel Structure Installation and the stretch-draw of steel zip, construction method is simple, adopt in construction is less, ensure that site safety, also ensure that construction quality simultaneously, considerably reduce construction cost.
Accompanying drawing explanation
Fig. 1 is the overall perspective view be made up of two all-wing aircraft pattern shell-space trussed constructions;
Fig. 2 is all-wing aircraft pattern shell-space trussed construction side view;
Fig. 3 is single all-wing aircraft pattern shell-space trussed construction front view;
Fig. 4 is single all-wing aircraft pattern shell-space trussed construction side partial enlarged drawing;
In figure, 1-main couple; 11-main couple upper chord; 12-main couple lower chord; 2-jack truss; 21-jack truss upper chord; 22-jack truss lower chord; 3-parallel-chord truss; 31-parallel-chord truss upper chord; 32-parallel-chord truss lower chord; 4-all-wing aircraft type truss; 42-all-wing aircraft type truss lower chord; 5-drag-line; 6-links bar; 7-support bar; 81-main couple base; 84-all-wing aircraft type truss base; 83-parallel-chord truss base.
Detailed description of the invention
This engineering ground floor B1, underground is exhibition room, is business steel truss structure on the ground, is mainly spatial triangle tube truss structure engineering; Comprising solder sphere, space drag-line.The every part of truss is coupled together by solder sphere, and form two hemisphere, in order to ensure stability and the steadiness of two hemisphere, each hemisphere is increased an all-wing aircraft type truss and coupled together by the truss of drag-line and hemisphere.Make total more stable.Global shape is the two lobe formwork shapes growing the symmetry having all-wing aircraft respectively, novel in design, and moulding is unique, uniform force.Roof system horizontal projection size is about 38.2m × 38.8m, general 750 square meters of its area coverage, steel truss top mark height 9.746m, and primary and secondary truss is mainly spatial triangle truss, and truss span is 38.8m.Chord member of truss cross section is P180x8, web member is P114x4.5, and material is Q235B.Adopt the steel tendon drag-line made with 1670 grades of high tensile steel wires, diameter is 22mm simultaneously.
All-wing aircraft pattern shell-space trussed construction comprises main couple 1, jack truss 2 and parallel-chord truss 3, main couple 1, jack truss 2 are welded to each other with parallel-chord truss 3 and are fixedly connected with, form " hemispherical " formwork space trussed construction, described trussed construction also comprises " arc-shaped " all-wing aircraft type truss 4 be positioned on formwork space trussed construction, all-wing aircraft type truss is connected by the jack truss of drag-line 5 with formwork space trussed construction, and two arc ends of all-wing aircraft type truss are fixed on bearing.
Be provided with the jack truss 2 that many Pin are parallel to each other between main couple 1 and parallel-chord truss 3, be connected with between jack truss 2 and link bar 6, link the upper chord 21 of bar 6 perpendicular to jack truss 2, and be welded to connect with jack truss upper chord 21.
Main couple 1 and parallel-chord truss 3 are provided with parallel with the upper chord 21 of jack truss 2, the support bar 7 vertical with linking bar 6; Support bar 7 is welded to connect with the upper chord of main couple 1 and parallel-chord truss 3, and links bar 4 and is welded to connect.
Jack truss 2 comprises jack truss upper chord 21, jack truss lower chord 22, jack truss upper chord 21 is welded to connect with main couple upper chord 11 and parallel-chord truss upper chord 31, and jack truss lower chord 22 is welded to connect with main couple lower chord 12 and parallel-chord truss lower chord 32.
Drag-line 5 upper end is connected on all-wing aircraft type truss lower chord 42, drag-line 5 lower end is connected to jack truss upper chord 21 and links on the crosspoint of bar 6, the design of the concrete drawknot structure of drag-line will through concrete mechanical calculation, shown in Figure 1, drag-line is V-shaped to be alternately connected between all-wing aircraft type truss and jack truss, shown in Figure 3, between the jack truss component of the both sides that all-wing aircraft type truss and all-wing aircraft type truss project on jack truss, equal drawknot has drag-line.
Main couple 1 is fixedly connected with all-wing aircraft type truss base 84 with main couple base 81 respectively by spherical bearing with the two ends of all-wing aircraft type truss 4; The parallel-chord truss chord member 32 of parallel-chord truss 3 is welded with spherical bearing, and spherical bearing is fixedly connected with parallel-chord truss base 83.
Preparative work before construction: for the technology priority and difficulty of this engineering construction, the scientific and rational constructure scheme of establishment and safety prevention measure before construction, and can construct after the examination & approval of management Construction unit, to the personnel participating in construction, carry out technical training targetedly and safety training in advance, make the related request that all constructors can be familiar with in constructure scheme, ensure that constructure scheme is implemented execution in work progress.
Construction of Steel Structure order: surveying setting-out → built-in fitting process → bearing installation → component transhipment → main couple splicing → support scaffolding sets up → and main couple installation → jack truss installs → links bar installation → support bar installation → welding → fringe truss splicing → fringe truss installation → drag-line installation → welding → polishing → repairing paint → fireproof paint.
Utilize the method for Digital Three-Dimensional modeling to be three-dimensional model diagram by Node, the connected mode at each position can be reflected intuitively from model, bearing is positioned, within control errors minimum zone according to axis of putting, absolute altitude on embedded part.
Specific construction step is:
The first step, bearing is installed: utilize the method for Digital Three-Dimensional modeling to be three-dimensional model diagram intuitively by Node, can according to axis of putting, absolute altitude on embedded part from model, be converted into again in on-the-spot practice of construction and bearing is positioned, within control errors minimum zone, recycling manually adjusts, and accomplishes that bearing is installed accurate;
Second step, hemisphere main couple is installed: because main couple hoisting height reaches 10m, and in order to avoid truss swings and facilitates the angle of personnel adjustment truss in hoisting process, therefore need carry out setting up scaffold and carry out supports main couple, the scaffolding height of scaffold is 9m, employing
48 × 3.0mm steel pipe, vertical pole ' s span 1m, step pitch spacing 1.2m, ensure globality and the stability of scaffold, horizontal cross brace 3 road set up by scaffold, and outside support body, scissors fully supports and establishes.So both ensure that truss has enough strong points also to bring operating space to constructor simultaneously.The main couple 100T mobile crane 4 spliced is installed, middle part adopts scaffold to support, two ends are connected with bearing, adopt ground to throw collimation method and control main couple axis, treat 3 in place after with wire rope and Chain block, oblique pull location, side is carried out to main couple.
3rd step, hemisphere jack truss is installed: jack truss adopts A114 × 4.5mm steel-pipe welding to form, 2 liftings are adopted in jack truss installation process, setting angle is adjusted with Chain block, top is docked with main couple node, bottom steelframe ball is connected with bearing, and main couple and jack truss connecting portion adopt scaffold building operating platform, ensures the safety of constructor.
4th step, steel cable is constructed:
1. early-stage preparations
Scene before drag-line construction prepares: 1) parts are after transporting to job site, and stack neat by number, lower chock a tree, used in making timber for boats, site requirements is neatly smooth, and will take fire prevention, rainproof, damp proof safeguard measure.2) whether inspection dragline anchorage, PE sheath have damage, if any revising immediately or repair.3) eliminate burr near drag-line, avoid injury protection cover.
2. hanging cable
Upper end drag-line is fixed, utilize the scaffold installing main couple as operating platform, mobile crane is utilized to be sling by drag-line fixed end in cooperation, hoisting point position should meet the slightly sagging required length in ground tackle upper end, on truss, node installation personnel adopt the instruments such as Chain block and fiber hanging belt manually to wear axle to be connected at scaffold operating platform, and the upper node of drag-line installs.
Lower node drag-line is installed; at lower node far-end, pulley is set; utilize and manually coordinate jack to be drawn to installation site drag-line lower end; during traction, colligation point should ensure that there is certain oscillating quantity ground tackle end; tackle drag-line in distraction procedure strictly to protect; avoid cable body and ground tackle screw thread impaired, and position when in time adjustment drag-line is unsettled.The torsion situation of the every root drag-line of close inspection in installation process, prevents drag-line from reversing with node and is connected.
3. stretch-draw
The determination of 3.1 stretching plans
Before stretch-draw, according to designing unit's computational analysis, combination define by designing unit, supervisor, unit in charge of construction the tension construction technology adopting grading tension, drag-line stretch value and chest expander dual control.
Selecting of 3.2 tensioning equipments
Be 30KN because this project stretching force be LS1 is 15KN and LS2, drag-line value of thrust is not very large, considers the limitation that this project construction frock drops into simultaneously, and stretch-draw adopts Chain block (jack)+chest expander to form.
3.3 concrete stretching plans
According to stretching force size, constructor utilizes Chain block to carry out Suo Li loading, and the stretching force of cucurbit is controlled by the reading of chest expander, and first cold stretch-draw is no less than 2 times, and each stretch-draw time is no less than 50min.
Cucurbit is utilized to carry out Suo Li loading to every root cable wire successively, cable wire is stretching and tentatively control to design Suo Li, in stretching process, necessary monitoring should be carried out, avoid the larger STRESS VARIATION of structure generation itself.
Will first install LS1a cable wire and tensioning, then install LS2 cable wire, after stretch-draw completes, LS1 Suo Li is 15KN, LS2 Suo Li is 30KN.
4. cable wire regulates:
4.1 are carrying out in stretching process to cable wire, stretch-draw can be caused to complete steel cable force and change, so be necessary that the cable wire to completing stretch-draw regulates, to guarantee that steel cable force reaches designing requirement.
4.2 adjust Suo Caiyong torque spanner to control, by setting wrenching torque, after locking Suo Li, sleeve is tightened, due to torque spanner particularity, if steel cable force reduces, then tighten rear loading by spanner, automatically lock after reaching pre-standing wire power, cannot continue to load, if Suo Liwei changes, due to the structure of torque spanner, cannot load.
4.3 utilize torque spanner to carry out Suo Li loading to every root cable wire successively.
4.4 adjust in rope process, should carry out necessary monitoring, avoid structure that larger STRESS VARIATION occurs.
Steel truss tension deformation is monitored: before stretch-draw, absolute altitude monitoring is carried out to main couple and jack truss, record data, inspection record is carried out to the bolt of truss and agent structure connecting portion, again to the monitoring of main couple and jack truss absolute altitude after stretch-draw completes, record data, have checked whether loosening and de-head to the bolt of truss and agent structure junction.Through front and back Data Comparison, distortion and absolute altitude error are all in allowed band.
The machinery that facts have proved, adopt Chain block and chest expander to coordinate and carry out Steel Structure Installation and the stretch-draw of steel zip, construction method is simple, adopt in construction is less, ensure that site safety, also ensure that construction quality simultaneously, considerably reduce construction cost.
Claims (10)
1. all-wing aircraft pattern shell-space trussed construction, its spy is, described trussed construction comprises main couple (1), jack truss (2) and parallel-chord truss (3), main couple (1), jack truss (2) is welded to each other with parallel-chord truss (3) and is fixedly connected with, form " hemispherical " formwork space trussed construction, described trussed construction also comprises " arc-shaped " all-wing aircraft type truss (4) be positioned on formwork space trussed construction, all-wing aircraft type truss is connected with the jack truss of formwork space trussed construction by drag-line (5), two arc ends of all-wing aircraft type truss are fixed on bearing.
2. all-wing aircraft pattern shell-space trussed construction according to claim 1, it is characterized in that, the jack truss (2) that many Pin are parallel to each other is provided with between described main couple (1) and parallel-chord truss (3), be connected with between jack truss (2) and link bar (6), link the upper chord (21) of bar (6) perpendicular to jack truss (2), and be welded to connect with jack truss upper chord (21).
3. all-wing aircraft pattern shell-space trussed construction according to claim 2, is characterized in that, described main couple (1) and parallel-chord truss (3) are provided with parallel with the upper chord of jack truss (2) (21), the support bar (7) vertical with linking bar (6); The upper chord of support bar (7) and main couple (1) and parallel-chord truss (3) is welded to connect, and links bar (4) and is welded to connect.
4. all-wing aircraft pattern shell-space trussed construction according to claim 1, it is characterized in that, described jack truss (2) comprises jack truss upper chord (21), jack truss lower chord (22), jack truss upper chord (21) is welded to connect with main couple upper chord (11) and parallel-chord truss upper chord (31), and jack truss lower chord (22) is welded to connect with main couple lower chord (12) and parallel-chord truss lower chord (32).
5. all-wing aircraft pattern shell-space trussed construction according to claim 1, it is characterized in that, described drag-line (5) upper end is connected on all-wing aircraft type truss lower chord (42), and drag-line (5) lower end is connected to jack truss upper chord (21) and links on the crosspoint of bar (6).
6. all-wing aircraft pattern shell-space trussed construction according to claim 1, is characterized in that, described main couple (1) is fixedly connected with all-wing aircraft type truss base (84) with main couple base (81) respectively by spherical bearing with the two ends of all-wing aircraft type truss (4); The parallel-chord truss chord member (32) of parallel-chord truss (3) is welded with spherical bearing, and spherical bearing is fixedly connected with parallel-chord truss base (83).
7. all-wing aircraft pattern shell-space trussed construction according to claim 1, it is characterized in that, described drag-line (5) is the steel tendon drag-line that 1670 grades of high tensile steel wires are made, and diameter is
22mm.
8. all-wing aircraft pattern shell-space trussed construction construction method, is characterized in that, comprises following construction sequence:
The first step, bearing is installed: utilize the method for Digital Three-Dimensional modeling to be three-dimensional model diagram intuitively by Node, can according to axis of putting, absolute altitude on embedded part from model, then is converted in on-the-spot practice of construction and is positioned by bearing;
Second step, main couple is installed: set up scaffold support main couple, and ensure globality and the stability of scaffold, horizontal cross brace 3 road set up by scaffold, and outside support body, scissors fully supports and establishes; The main couple mobile crane 4 spliced is installed, middle part adopts scaffold to support, two ends are connected with bearing, adopt ground to throw collimation method and control main couple axis, treat 3 in place after with wire rope and Chain block, oblique pull location, side is carried out to main couple;
3rd step, jack truss is installed: jack truss adopts steel-pipe welding to form, 2 liftings are adopted in jack truss installation process, setting angle is adjusted with Chain block, top is docked with main couple node, bottom steelframe ball is connected with bearing, and main couple and jack truss connecting portion adopt scaffold building operating platform, ensures the safety of constructor;
4th step, steel cable is constructed:
1) early-stage preparations
Scene before drag-line construction prepares: parts are after transporting to job site, stack neat by number, lower chock a tree, used in making timber for boats, site requirements is neatly smooth, and take fire prevention, rainproof, damp proof safeguard measure, whether inspection dragline anchorage, PE sheath have damage, eliminate burr near drag-line, avoid injury protection cover if any revising immediately or repair;
2) hanging cable
Upper end drag-line is fixed: utilize the scaffold installing main couple as operating platform, coordinating utilizes mobile crane to be sling by drag-line fixed end again, hoisting point position should meet the slightly sagging required length in ground tackle upper end, on truss, node installation personnel adopt Chain block manually to wear axle with fiber hanging belt and be connected at scaffold operating platform, and the upper node of drag-line installs;
Lower node drag-line is installed: arrange pulley at lower node far-end, utilize and manually coordinate jack to be drawn to installation site drag-line lower end, during traction, colligation point should ensure that there is certain oscillating quantity ground tackle end, tackle drag-line in distraction procedure strictly to protect, avoid cable body and ground tackle screw thread impaired, and the torsion situation of the every root drag-line of close inspection in position installation process when in time adjustment drag-line is unsettled, prevent drag-line from reversing with node and be connected;
3) stretch-draw: the selected and concrete stretching plan comprising the determination of stretching plan, tensioning equipment;
4) cable wire regulates: adjust Suo Caiyong torque spanner to control, and by setting wrenching torque, tightens after locking Suo Li to sleeve; Torque spanner is utilized to carry out Suo Li loading to every root cable wire successively.
9. construction method according to claim 8, it is characterized in that, in the steel cable construction of the 4th step, according to stretching force size, constructor utilizes Chain block to carry out Suo Li loading, the stretching force of cucurbit is controlled by the reading of chest expander, and first cold stretch-draw is no less than 2 times, and each stretch-draw time is no less than 50min; Utilize cucurbit to carry out Suo Li loading to every root cable wire successively, by cable wire stretching and tentatively control to design Suo Li.
10. construction method according to claim 8, it is characterized in that, before stretch-draw, absolute altitude monitoring is carried out to main couple and jack truss, record data, carry out inspection record to the bolt of truss and agent structure connecting portion, again to the monitoring of main couple and jack truss absolute altitude after stretch-draw completes, record data, have checked whether loosening and de-head to the bolt of truss and agent structure junction.
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| CN113700311A (en) * | 2021-09-28 | 2021-11-26 | 中能建西北城市建设有限公司 | Construction method for high-altitude positioning of steel casting of steel structure building |
| CN114635566A (en) * | 2022-04-07 | 2022-06-17 | 中电建路桥集团有限公司 | Construction method of French style dome structure |
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| CN109235770A (en) * | 2018-11-16 | 2019-01-18 | 中建二局安装工程有限公司 | A kind of long-span deformed section intersection truss structure and its installation method |
| CN109235770B (en) * | 2018-11-16 | 2023-08-11 | 中建二局安装工程有限公司 | Large-span special-shaped cross truss structure and mounting method thereof |
| CN113700311A (en) * | 2021-09-28 | 2021-11-26 | 中能建西北城市建设有限公司 | Construction method for high-altitude positioning of steel casting of steel structure building |
| CN113700311B (en) * | 2021-09-28 | 2022-10-11 | 中能建西北城市建设有限公司 | Construction method for high-altitude positioning of steel casting of steel structure building |
| CN114635566A (en) * | 2022-04-07 | 2022-06-17 | 中电建路桥集团有限公司 | Construction method of French style dome structure |
| CN114635566B (en) * | 2022-04-07 | 2023-07-07 | 中电建路桥集团有限公司 | French style dome structure construction method |
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