CN103061520A - Annular crossing funicular truss structure mounting method - Google Patents
Annular crossing funicular truss structure mounting method Download PDFInfo
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- CN103061520A CN103061520A CN2013100250591A CN201310025059A CN103061520A CN 103061520 A CN103061520 A CN 103061520A CN 2013100250591 A CN2013100250591 A CN 2013100250591A CN 201310025059 A CN201310025059 A CN 201310025059A CN 103061520 A CN103061520 A CN 103061520A
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Abstract
The invention relates to an annular crossing funicular truss structure mounting method. The method includes: firstly, prefabricating a peripheral annular pressed truss, stay ropes, intermediate stay bars and a double-layer pressing plate type fixture in a factory, and transporting the prefabricated parts to the field prior to hoisting and performing field welding for truss sections; secondly, mounting top chord bull ropes one by one in a fixed direction, mounting double-layer pressing plate type fixture joints at the crossing positions of the top chord bull ropes, and fixing the double-layer pressing plate type fixture joints with the intermediate stay bars through lug plates; thirdly, using the double-layer pressing plate type fixture joints for fixedly connecting bottom chord bearing ropes with the intermediate stay bars so that all the stay ropes in the funicular truss structure are in the relaxed state at the moment, applying prestressing force for the rope bodies, and controlling the peripheral annular pressed truss to deform in a batched and graded manner; and finally, clamping the double-layer pressing plate type fixture joints so that mounting is completed. The annular crossing funicular truss structure mounting method is applicable to mounting of annular crossing funicular truss structures, is reasonable and definite in mounting sequence, simple, feasible and capable of giving full play to advantages of annular pressed trusses and has high practical value.
Description
Technical field
The present invention relates to a kind of mounting method of roundabout Cable Truss Structure, belong to Spatial Cable trussed construction field.
Background technology
Along with the development of society, the demand of public activity space such as large-scale exhibition hall, stadiums etc. grows with each passing day.Such demand has also further driven the innovation of large-span space structure system.Large span space building is the landmark in a zone often, therefore not only safety, the economic dispatch target as structure design will be the more important thing is that U.S.A of bar structure shows, and realizes the combination of power and beauty.In recent years, use morely in the large-span cable structure construction of stadium and gymnasium at home and abroad, come from the stress performance that Cable Structure takes full advantage of the high strength drag-line, reduced steel using amount when guaranteeing the rigidity of structure, make structure become slim and graceful, expressive.
Cable Truss Structure is a kind of form of Cable Structure, crosses over the factors such as spacial ability is strong, steel using amount is low because of it, is widely used in the public buildings such as stadiums.The arrangement form of Cable Truss Structure mainly contains and is arranged in parallel, square crossing layout, radial layout etc.Open wide the buildings such as stadium of periphery awning in the middle of wherein radial Cable Truss Structure (being also referred to as annular on an empty stomach cable truss or annular tension cable truss) is applicable to, be arranged in parallel, square crossing arranges that Cable Truss Structure then is applicable to other building.The weak point of radial cable truss mainly is the following aspects:
1, the quantity of rope section and strut is more.
2, structure self can't guarantee to stablize outside the plane, needs along being arranged circumferentially the lateral stability that steadying line guarantees each Pin cable truss.
3, the collapse resistant capacity of structure a little less than, the radial Cable Truss Structure relies on central strop that each Pin cable truss is linked together, and makes structure obtain enough rigidity and bearing capacity by stretch-draw central authorities strop.When the somewhere drag-line produced more high-prestressed loss or cable body fracture, the rigidity of structure descended obviously, even causes structural entity to collapse.
Summary of the invention
The purpose of patent of the present invention is to improve above not enough, and a kind of mounting method that is applicable to the roundabout Cable Truss Structure of the buildings such as the middle stadium that opens wide the periphery awning is provided.This Cable Truss Structure is arranged by some Pin plane fish-bellied type cable truss roundabout and is formed.Each flat cable truss arranged crosswise becomes the three-dimensional system of a body force, can mutually guarantee to stablize outside the plane, need not to arrange the hoop steadying line again.Can share a strut at infall, so strut quantity can reduce.Meanwhile, each Pin plane fish-bellied type cable truss keeps relatively independent, outside guaranteeing the plane in the stable situation, plane fish-bellied type cable truss itself is bearing load separately, even a certain Pin cable truss is deactivated for some reason, not therefore redistribution of internal force can occur in structure, can provide bearing capacity by the intact plane fish-bellied type cable truss of remainder, and structure can be and integral body collapses.
The purpose of this invention is achieved through the following technical solutions:
A kind of mounting method of roundabout Cable Truss Structure, described roundabout Cable Truss Structure mainly is comprised of Cable Truss Structure and annular pressurized truss two parts, annular pressurized truss partly provides horizontal restraint for Cable Truss Structure, Cable Truss Structure be connected the pressurized truss and connect by pin joint formula connected node; Described Cable Truss Structure forms the roundabout Cable Truss Structure that central authorities open wide, periphery covers roofing by many Pin plane fish-bellied type cable truss combined crosswise, described plane fish-bellied type cable truss is made of the steadying line that winds up, middle strut, lower edge track cable, and middle strut connects wind up steadying line and lower edge track cable; Wind up steadying line or lower edge track cable crossover sites of many of described Cable Truss Structure adopts double-deck presser type anchor clamps node, and double-deck presser type anchor clamps node adopts the pin formula to be connected with middle strut; Annular pressurized truss is leg-of-mutton space truss structure, mainly is comprised of three tubular type ring bars and Duo Gen tubular type web member, and the ring bar is connected with web member and passes through mutually the welding node connection; Wind up steadying line and lower edge track cable is comprised of cable body and ground tackle, and the cable body two ends are provided with ground tackle, it is characterized in that: the mounting method of described roundabout Cable Truss Structure is as follows:
Step 1: annular pressurized truss is prefabricated in the factory;
Step 2: after transporting to the erecting bed, with mobile crane with annular each section of pressurized truss hang carry out behind the precalculated position temporary fixed, treat all rigging outs of all sections, finely tune position to each section, the interface at each section edge can finely be coincide, after total interface coincide, structure is carried out Site Welding, form complete annular pressurized truss; After the splicing of annular pressurized truss is complete, it is welded on the pre-embedded steel slab of pedestal, carries out permanent fixing;
Step 3: the drag-line that is prefabricated in the factory wind up steadying line, middle strut, lower edge track cable and double-deck presser type anchor clamps node, transport to on-the-spot the installation; After prefabricated the finishing, carry out mark according to drawing at the crossover node position of rope, the double-deck presser type anchor clamps of convenient installation;
Step 4: the steadying line that winds up is installed;
Step 5: the double-deck presser type anchor clamps node that the steadying line that winds up is installed;
Step 6: the double-deck presser type anchor clamps node of strut and lower edge track cable in the middle of installing;
Step 7: the lower edge track cable is installed;
Step 8: apply prestressing force: after treating that whole cable bodies and double-deck presser type anchor clamps node installation are complete, prepare cable body is applied prestressing force;
Step 9: clamp double-deck presser type anchor clamps node.
The concrete steps of described step 1 are: at first, annular pressurized truss is divided into the identical section of several specifications, each section mainly forms the triangular-section space truss by interior ring bar, upper outer shroud bar, lower outer shroud bar, montant, outer brace, middle part brace, otic placode, weld otic placode at pressurized truss section, then, reserve welding junction at each section edge member, with convenient on-the-spot splicing; Completion of processing transports the job site to by the truck segmentation and installs.
The concrete steps of described step 4 are: at first set up scaffold below the otic placode of annular pressurized truss before the hanging cable, workman's operating platform is set, utilize will wind up rope head and the construction tool of steadying line of crane and construction hanging basket to winch to operation platform, wear bearing pin by the workman, the rope head of the steadying line that winds up is installed in the otic placode place of annular pressurized truss; Adopt the cord clip clamping steadying line that winds up to lift during lifting, in order to avoid damage the steadying line outer jointing jacket that winds up; Wind up the steadying line stretching end to apart from other end truss otic placode 2m place by hoist engine traction, it is in place that recycling tooling device and jack draw the steadying line stretching end that winds up, wear will the wind up other end of steadying line of pin by the workman and be fixed on the otic placode place, the steadying line that winds up this moment is in relaxed state; Selected otic placode is initial mounting points, two steadying lines that wind up on this otic placode at first are installed, other steadying lines that wind up are installed after finishing in the direction of the clock successively, and the steadying line that winds up of rear installation is in the below of the mounted steadying line that winds up, and determines according to this relative position.
The concrete steps of described step 5 are: after the steadying line installation of all winding up, according to the order that steadying line is installed all double-deck presser type anchor clamps nodes on this rope are installed, described double-deck presser type anchor clamps node comprises four layers of circular clamping plate, bolt and otic placode, and the circular clamping plate downside of first floor is provided with an otic placode; The circular clamping plate of first and second layer step up the internal layer rope by bolt; The circular clamping plate of third and fourth layer clamp outer rope by bolt; The circular clamping plate of second layer inboard is provided with band mark of mouth groove, and the 3rd layer of circular clamping plate inboard is provided with band tooth projection, thereby with the mark of mouth groove with can inlay the effect of playing fixed angle and node resistance to plucking with the tooth projection; The circular clamping plate of first floor and the circular clamping plate of the second layer of the board-like anchor clamps node of Double-layer clamp at first are installed during installation, the internal layer rope of the steadying line that winds up is placed the rope groove place of the circular clamping plate of first floor, bolt is passed two screws reserving on the circular clamping plate of first floor, at downside, this moment is nutting not at the circular clamping plate upside of first floor, nut for bolt head; The circular clamping plate of the second layer are divided into two from the centre, after the circular clamping plate of the second layer are in place, turn the nut of the circular clamping plate downside of first floor, clamp gently the circular clamping plate of first and second layer,, but allow the internal layer rope slippage of clamping; Be in no hurry to when the circular clamping plate of the second layer are installed two semicircle clamping plate are fitted, after the second layer and the 3rd layer of circular clamping plate adjustment angle, fit again; The 3rd layer of circular clamping plate are provided with two place's screws, at first bolt are passed the screw of the 3rd layer of circular clamping plate, and bolt end is positioned at the 3rd layer of circular clamping plate downside, then the 3rd layer of circular clamping plate are placed the band mark of mouth groove of the circular clamping plate of the second layer with the tooth projection; After the scale adjustment drag-line angle by the circular clamping plate of second and third layer edge, two semicircle clamping plate chuckings of the circular clamping plate of the second layer are fitted, the tooth of the circular clamping plate of second and third layer this moment is interlocked, and the angle that two-layer drag-line forms determines that node just can't rotate; The outer rope of the steadying line that winds up is placed the rope groove place of the 3rd layer of circular clamping plate, placed in advance bolt on the 3rd layer of circular clamping plate, the screw of the 4th layer of circular clamping plate is aimed at bolt and the 3rd layer of circular clamping plate applying, also gently tighten at the 4th layer of circular clamping plate outside mounting nuts this moment, but allow outer rope along the slippage of rope groove; The double-deck presser type anchor clamps node at steadying line crossover node place is installed successively according to clockwise direction.
The concrete steps of described step 6 are: be provided with otic placode at the circular clamping plate downside of the first floor of double-deck presser type anchor clamps node, middle strut top is provided with otic placode equally, and with the preformed hole alignment of both otic placodes, the strut pin passes preformed hole the two is fixed; The circular clamping plate of first floor of the double-deck presser type anchor clamps node of track cable are installed in the strut lower end with same method, and with the otic placode preformed hole alignment of the two, the strut pin passes preformed hole the two is fixed, and strut is in free vacant state in the middle of this moment.
The concrete steps of described step 7 are: the method that the lower edge track cable is installed is identical with the method that the steadying line that winds up is installed, the fixed end of lower edge track cable is fixed by otic placode and annular pressurized truss, by hoist engine traction lower edge track cable stretching end to apart from other end truss otic placode 2m place, recycling tooling device and jack traction lower edge track cable stretching end is in place, wears bearing pin by the workman other end of lower edge track cable is fixed on the otic placode place; Two lower edge track cables at each otic placode place are installed successively according to clockwise direction; After the track cable installation, the circular clamping plate of the second layer of double-deck presser type anchor clamps node are installed at the flag node position, clamping plate are divided into two, after the circular clamping plate of the second layer are in place, turn the nut of the circular clamping plate downside of first floor, clamp gently the circular clamping plate of first and second layer, but allow the internal layer rope slippage of the lower edge track cable of clamping; The 3rd layer of circular clamping plate are placed the band mark of mouth groove of the circular clamping plate of the second layer with the tooth projection, after the scale adjustment drag-line angle by the circular clamping plate of second and third layer edge, two semicircle clamping plate chuckings of the circular clamping plate of the second layer are fitted, and node just can't rotate; The outer rope of lower edge track cable is placed the rope groove place of the 3rd layer of circular clamping plate, placed in advance bolt on the 3rd layer of circular clamping plate, the screw of the 4th layer of circular clamping plate is aimed at bolt and the 3rd layer of circular clamping plate applying, also gently tighten at the 4th layer of circular clamping plate outside mounting nuts this moment, but allow outer rope along the slippage of rope groove, all drag-lines in the Cable Truss Structure are in relaxed state at this moment, can not bear external load.
The concrete steps of described step 8 are: the stretch-draw of every cable body, adopt the mode of two jack synchronous tensions in parallel, and the stretch-draw counterforce device of installing at Nodes must be solid and reliable and be easy to dismantle; Consider during stretch-draw that cable body is on the impact of the annular pressurized truss in outside, adopt the mode of symmetrical stretch-draw to control the distortion of annular pressurized truss, with fixed-direction grading tension in batches, stretching process is divided into level Four, first order stretch-draw is to 10% of target Suo Li, second level stretch-draw is to 30% of target Suo Li, and third level stretch-draw is to 70% of target Suo Li, the fourth stage is super be stretched to target Suo Li 105% to offset loss of prestress.
The concrete steps of described step 9 are: after whole cable body stretch-draw are complete, each node is checked, fine setting, confirm that the errorless hex bolts of tightening afterwards clamps the circular clamping plate of the first floor of double-deck presser type anchor clamps node, to wind up steadying line, lower edge track cable be fixed on double-deck presser type anchor clamps Nodes can't slippage, namely install.
Described cable body adopts Galfan coating drag-line, and described ground tackle adopts fork ear muff cylinder adjustable type ground tackle, and described Cable Truss Structure is no less than 5 Pin.
Beneficial effect: this method has been drawn the outstanding mounting method of other large-span cable trussed construction installation processes, combines with the form of structure of roundabout cable truss, can give full play to the advantage of roundabout cable truss, and higher practical value is arranged.
Description of drawings
Fig. 1 roundabout cable truss axonometric drawing;
Fig. 2 pressurized truss district plan;
Fig. 3 pressurized truss section I-I sectional drawing;
Fig. 4 annular pressurized truss otic placode Nodes Three-dimensional figure;
Fig. 5 annular pressurized truss construction diagrams;
Fig. 6 plane fish-bellied type cable truss elevation;
Fig. 7 dragline anchorage sectional drawing;
The board-like rope bar of Fig. 8 Double-layer clamp node elevation;
Fig. 9 node component decomposing schematic representation;
Figure 10 first floor clamping plate upward view;
Figure 11 first floor clamping plate top view;
Figure 12 second layer clamping plate axonometric drawing;
Figure 13 second layer clamping plate upward view;
Figure 14 triple laminate upward view;
Figure 15 triple laminate top view;
Figure 16 triple laminate front elevation drawing;
Figure 17 the 4th laminated plank upward view;
Figure 18 the 4th laminated plank top view;
Figure 19 the 4th laminated plank front elevation drawing;
Among the figure: 1-compression ring truss; Ring bar in the 2-; The upper outer shroud bar of 3-; Outer shroud bar under the 4-; The 5-montant; The outer brace of 6-; 7-middle part brace; The 8-otic placode; The 9-steadying line that winds up; Strut in the middle of the 10-; 11-lower edge track cable; 12-ground tackle pin; The double-deck presser type anchor clamps of 13-node; 14-strut pin; The circular clamping plate of the first floor of the double-deck presser type anchor clamps of 15-; The circular clamping plate downside of the first floor otic placode of the double-deck presser type anchor clamps of 16-; Strut otic placode in the middle of the 17-; The circular clamping plate of the second layer of the double-deck presser type anchor clamps of 18-; 19-internal layer cable body; The rope groove of the circular clamping plate of first floor of the double-deck presser type anchor clamps of 20-; The bolt of the circular clamping plate of first floor of the double-deck presser type anchor clamps of 21-; The screw of the circular clamping plate of first floor of the double-deck presser type anchor clamps of 22-; The nut of the circular clamping plate of first floor of the double-deck presser type anchor clamps of 23-; The 3rd layer of circular clamping plate of the double-deck presser type anchor clamps of 24-; The screw of the 3rd layer of circular clamping plate of the double-deck presser type anchor clamps of 25-; The bolt of the 3rd layer of circular clamping plate of the double-deck presser type anchor clamps of 26-; The band tooth projection of the 3rd layer of circular clamping plate of the double-deck presser type anchor clamps of 27-; The band mark of mouth groove of the circular clamping plate of the second layer of the double-deck presser type anchor clamps of 28-; The 4th layer of circular clamping plate of the double-deck presser type anchor clamps of 29-; The outer cable body of 30-; The rope groove of the 3rd layer of circular clamping plate of the double-deck presser type anchor clamps of 31-; The screw of the 4th layer of circular clamping plate of the double-deck presser type anchor clamps of 32-; The nut of the 4th layer of circular clamping plate of the double-deck presser type anchor clamps of 33-.
The specific embodiment
Shown in Fig. 1-19, the mounting method of roundabout Cable Truss Structure of the present invention is specific as follows:
Mainly be comprised of Cable Truss Structure and annular pressurized truss 1 two parts, annular pressurized truss 1 partly provides horizontal restraint for Cable Truss Structure, Cable Truss Structure be connected pressurized truss 1 and connect by pin joint formula connected node; Cable Truss Structure forms the roundabout Cable Truss Structure that central authorities open wide, periphery covers roofing by many Pin plane fish-bellied type cable truss combined crosswise, plane fish-bellied type cable truss is made of the steadying line 9 that winds up, middle strut 10, lower edge track cable 11, and middle strut 10 connects wind up steadying line 9 and lower edge track cable 11; Wind up steadying line 9 or lower edge track cable 11 crossover sites of many of described Cable Truss Structure adopt double-deck presser type anchor clamps node 13, and double-deck presser type anchor clamps node 13 adopts the pin formulas to be connected with middle strut 10.Annular pressurized truss 1 is leg-of-mutton space truss structure, mainly is comprised of three tubular type ring bars and Duo Gen tubular type web member.The ring bar is connected with web member and passes through mutually the welding node connection.Wind up steadying line 9 and lower edge track cable 11 is comprised of cable body and ground tackle, and the cable body two ends are provided with ground tackle.Wherein, cable body adopts Galfan coating drag-line, and ground tackle adopts fork ear muff cylinder adjustable type ground tackle, and Cable Truss Structure is no less than 5 Pin.
The concrete mounting method of above-mentioned roundabout Cable Truss Structure is:
Step 1: annular pressurized truss 1 is prefabricated in the factory: at first, annular pressurized truss 1 is divided into the identical section of several specifications, each section mainly forms the triangular-section space truss by interior ring bar 2, upper outer shroud bar 3, lower outer shroud bar 4, montant 5, outer brace 6, middle part brace 7, otic placode 8, at pressurized truss section welding otic placode 8, then, reserve welding junction at each section edge member, with convenient on-the-spot splicing; Completion of processing transports the job site to by the truck segmentation and installs.Annular pressurized truss outward appearance is only take Fig. 1 as example, and form is not limited to this;
Step 2: after transporting to the erecting bed, with mobile crane with pressurized truss section hang carry out behind the precalculated position temporary fixed, treat all rigging outs of all sections, finely tune position to each section, the interface at each section edge can finely be coincide, after total interface coincide, structure is carried out Site Welding, form complete annular pressurized truss 1; After 1 splicing of annular pressurized truss is complete, it is welded on the pre-embedded steel slab of pedestal, carries out permanent fixing;
Step 3: the drag-line that is prefabricated in the factory wind up steadying line 9, middle strut 10, lower edge track cable 11 and double-deck presser type anchor clamps node 13, transport to on-the-spot the installation.After prefabricated the finishing, carry out mark according to drawing at the crossover node position of rope, the double-deck presser type anchor clamps 13 of convenient installation;
Step 4: the steadying line 9 that winds up is installed: at first below the otic placode of annular pressurized truss, set up scaffold before the hanging cable, workman's operating platform is set.Utilize will the wind up rope head of steadying line 9 and construction tool etc. of crane and construction Special hanging basket to winch to operation platform.Wear bearing pin by the workman, the rope head of steadying line is installed in otic placode 8 places (fixed end) of pressurized truss 1.Adopt custom-designed cord clip clamping steadying line to lift during lifting, in order to avoid damage the drag-line outer jointing jacket.To apart from other end truss otic placode 8 about 2m places, recycling tooling device and jack traction cable stretching end are in place by hoist engine traction cable stretching end, wear pin 12 by the workman other end of steadying line is fixed on the otic placode place.The steadying line 9 that winds up this moment is in relaxed state.Selected otic placode 8 be initial mounting points, and two steadying lines on this otic placode 8 at first are installed, and other steadying lines are installed after finishing in the direction of the clock successively, the steadying line of rear installation be in mounted rope system below, determine according to this relative position;
Step 5: the double-deck presser type anchor clamps node 13 that the steadying line 9 that winds up is installed: after steadying line 9 installations of all winding up, according to the order that steadying line is installed all double-deck presser type anchor clamps 13 on this rope are installed.The circular clamping plate 15 of first floor and the circular clamping plate 18 of the second layer of the board-like anchor clamps of Double-layer clamp at first are installed, internal layer rope 19 is placed rope groove 20 places of the circular clamping plate of first floor, bolt 21 is passed two screws 22 reserving on the circular clamping plate 15 of first floor, at downside, this moment is nutting 23 not at circular clamping plate 15 upsides of first floor, nut 23 for bolt 21 heads.The circular clamping plate 18 of the second layer are divided into two from the centre, after circular clamping plate of the second layer 18 are in place, turn the nut 23 of circular clamping plate 15 downsides of first floor, clamp gently the circular clamping plate 15 of first and second layer, 18, but allow internal layer rope 19 slippages of clamping.When being installed, the circular clamping plate 18 of the second layer are in no hurry to two semicircle clamping plate are fitted again applying after the second layer and the 3rd layer of circular clamping plate 18,24 are adjusted angles.The 3rd layer of circular clamping plate 24 are provided with two place's screws 25, at first bolt 26 is passed the screw 25 of the 3rd layer of circular clamping plate, bolt 26 terminations are positioned at the 3rd layer of circular clamping plate 24 downside, then the 3rd layer of circular clamping plate 24 are placed the band mark of mouth groove 28 of the circular clamping plate 18 of the second layer with tooth projection 27.After the scale adjustment drag-line angle by the circular clamping plate 18 of second and third layer, 24 edges, two semicircle clamping plate chuckings of the circular clamping plate 18 of the second layer are fitted, this moment, second and third layer circular clamping plate 18,24 tooth were interlocked, and the angle that two-layer drag-line forms determines that node just can't rotate.Outer rope 30 is placed rope groove 31 places of the 3rd layer of circular clamping plate 24, placed in advance bolt 26 on the 3rd layer of circular clamping plate 24, the screw 32 of the 4th layer of circular clamping plate 29 is aimed at bolt 26 and the 3rd layer of circular clamping plate 24 applying, also gently tighten at the 4th layer of circular clamping plate 29 outside mounting nuts 33 this moment, but allow outer rope 30 along 31 slippages of rope groove.The double-deck presser type anchor clamps 13 at steadying line crossover node place are installed successively according to clockwise direction;
Step 6: the double-deck presser type anchor clamps node 13 of strut 10 and lower edge track cable 11 in the middle of installing: be provided with otic placode 16 at the circular clamping plate downside of the first floor of anchor clamps, middle strut 10 tops are provided with otic placode 17 equally, with both otic placodes 16, the alignment of 17 preformed hole, strut pin 14 passes preformed hole the two is fixed.The circular clamping plate 15 of first floor of the double-deck presser type anchor clamps 13 of track cable 11 are installed in strut 10 lower ends with same method, and with the otic placode preformed hole alignment of the two, strut pin 14 passes preformed hole the two is fixed.Strut 10 is in free vacant state in the middle of this moment;
Step 7: lower edge track cable 11 is installed: the method that lower edge track cable 11 is installed is identical with the method that the steadying line 9 that winds up is installed, the fixed end of lower edge track cable 11 is fixing with pressurized truss 1 by otic placode 8, by hoist engine traction cable stretching end to apart from other end truss otic placode 8 about 2m places, recycling tooling device and jack pull line stretching end is in place, wears bearing pin by the workman other end of track cable 11 is fixed on otic placode 8 places.Two track cables 11 at each otic placode 8 place are installed successively according to clockwise direction.After track cable 11 installations, the circular clamping plate 18 of the second layer of double-deck presser type anchor clamps node 13 are installed at the flag node position, clamping plate are divided into two, after circular clamping plate of the second layer 18 are in place, turn the nut 23 of circular clamping plate 15 downsides of first floor, clamp gently the circular clamping plate 15 of first and second layer, 18, but allow internal layer rope 19 slippages of clamping.The 3rd layer of circular clamping plate 24 are placed the band mark of mouth groove 28 of the circular clamping plate 18 of the second layer with tooth projection 27.After the scale adjustment drag-line angle by the circular clamping plate 18 of second and third layer, 24 edges, two semicircle clamping plate chuckings of the circular clamping plate 18 of the second layer are fitted, node just can't rotate.Outer rope 30 is placed rope groove 31 places of the 3rd layer of circular clamping plate 24, placed in advance bolt 26 on the 3rd layer of circular clamping plate 24, the screw 32 of the 4th layer of circular clamping plate 29 is aimed at bolt 26 and the 3rd layer of circular clamping plate 24 applying, also gently tighten at the 4th layer of circular clamping plate 29 outside mounting nuts 33 this moment, but allow outer rope 30 along 31 slippages of rope groove.All drag-lines in the Cable Truss Structure are in relaxed state at this moment, can not bear external load;
Step 8: apply prestressing force: after treating that whole cable bodies and double-deck presser type anchor clamps node 13 install, prepare cable body is applied prestressing force.The mode of two jack synchronous tensions in parallel is adopted in the stretch-draw of every cable body, and the stretch-draw counterforce device of installing at Nodes must be solid and reliable and be easy to dismantle.Consider during stretch-draw that cable body is on the impact of the annular pressurized truss 1 in outside, preferably adopt the mode of symmetrical stretch-draw to control the distortion of annular pressurized truss, take the roundabout cable truss of 16 ropes as example, so that wherein four cable bodies around centre of form symmetry are as a collection of, stretch-draw is carried out in classification in batches.At first carry out first order stretch-draw, make the preliminary tensioning of all cable bodies.Simultaneous tension is around first four lower edge track cables 11 of centre of form symmetry, and stretching force is controlled at 10% of target Suo Li.After stretch-draw is finished, all the other each batch lower edge track cables 11 of stretch-draw successively in a clockwise direction.After 11 stretch-draw of lower edge track cable were complete, the steadying line 9 that winds up adopted same stretching mode, and take four cable bodies as a collection of, 10% of target Suo Li is arrived in stretch-draw successively clockwise.Carry out second and third grade stretch-draw with same method, stretch-draw lower edge track cable 11 at first, take four track cables as a collection of, clockwise direction is stretched to 30% and 70% of target Suo Li successively, after finishing again successively stretch-draw wind up steadying line 9 to 30% and 70% of target Suo Li.The fourth stage adopts the mode of super stretch-draw, and to offset loss of prestress, stretching mode is with upper identical.Pretensioning lower edge track cable 11, the stretch-draw steadying line 9 that winds up makes Suo Li reach 105% of target Suo Li again.To note in the stretching process adopting dual control, be controlled to be the master with stretching force, take Deformation control as auxiliary.In the stretching process, stretching force and deformation values all must could continue stretch-draw in the claimed range of standard, otherwise need stop stretch-draw, just can proceed after the queueing problem.
Step 9: clamp double-deck presser type anchor clamps node 13: after whole cable body stretch-draw are complete, each node is checked fine setting.Confirm to tighten after errorless hex bolts 33 clamping plate 15 of double-deck presser type anchor clamps node 13 are clamped, the steadying line 9 that will wind up, lower edge track cable 11 are fixed on double-deck presser type anchor clamps node 13 places can't slippage, namely installs.
More than be an exemplary embodiments of the present invention, enforcement of the present invention is not limited to this.
Claims (9)
1. the mounting method of a roundabout Cable Truss Structure, described roundabout Cable Truss Structure mainly is comprised of Cable Truss Structure and annular pressurized truss (1) two parts, annular pressurized truss (1) partly provides horizontal restraint for Cable Truss Structure, Cable Truss Structure be connected pressurized truss (1) and connect by pin joint formula connected node; Described Cable Truss Structure forms the roundabout Cable Truss Structure that central authorities open wide, periphery covers roofing by many Pin plane fish-bellied type cable truss combined crosswise, described plane fish-bellied type cable truss is made of the steadying line that winds up (9), middle strut (10), lower edge track cable (11), and middle strut (10) connects wind up steadying line (9) and lower edge track cable (11); Many the steadying lines that wind up (9) of described Cable Truss Structure or lower edge track cable (11) crossover sites adopt double-deck presser type anchor clamps node (13), and double-deck presser type anchor clamps node (13) adopts the pin formula to be connected with middle strut (10); Annular pressurized truss (1) is leg-of-mutton space truss structure, mainly is comprised of three tubular type ring bars and Duo Gen tubular type web member, and the ring bar is connected with web member and passes through mutually the welding node connection; Wind up steadying line (9) and lower edge track cable (11) is comprised of cable body and ground tackle, and the cable body two ends are provided with ground tackle, it is characterized in that: the mounting method of described roundabout Cable Truss Structure is as follows:
Step 1: annular pressurized truss (1) is prefabricated in the factory;
Step 2: after transporting to the erecting bed, with mobile crane with each section of annular pressurized truss (1) hang carry out behind the precalculated position temporary fixed, treat all rigging outs of all sections, finely tune position to each section, the interface at each section edge can finely be coincide, after total interface coincide, structure is carried out Site Welding, form complete annular pressurized truss (1); After annular pressurized truss (1) splicing is complete, it is welded on the pre-embedded steel slab of pedestal, carries out permanent fixing;
Step 3: the drag-line that is prefabricated in the factory wind up steadying line (9), middle strut (10), lower edge track cable (11) and double-deck presser type anchor clamps node (13), transport to on-the-spot the installation; After prefabricated the finishing, carry out mark according to drawing at the crossover node position of rope, the convenient double-deck presser type anchor clamps (13) of installing;
Step 4: the steadying line (9) that winds up is installed;
Step 5: the double-deck presser type anchor clamps node (13) that the steadying line (9) that winds up is installed;
Step 6: the double-deck presser type anchor clamps node (13) of strut (10) and lower edge track cable (11) in the middle of installing;
Step 7: lower edge track cable (11) is installed;
Step 8: apply prestressing force: after treating that whole cable bodies and double-deck presser type anchor clamps node (13) install, prepare cable body is applied prestressing force;
Step 9: clamp double-deck presser type anchor clamps node (13).
2. the mounting method of a kind of roundabout Cable Truss Structure according to claim 1, it is characterized in that: the concrete steps of described step 1 are: at first, annular pressurized truss 1 is divided into the identical section of several specifications, each section is mainly by interior ring bar (2), upper outer shroud bar (3), lower outer shroud bar (4), montant (5), outer brace (6), middle part brace (7), otic placode (8) forms the triangular-section space truss, weld otic placode (8) at pressurized truss section, then, reserve welding junction at each section edge member, with convenient on-the-spot splicing; Completion of processing transports the job site to by the truck segmentation and installs.
3. the mounting method of a kind of roundabout Cable Truss Structure according to claim 2, it is characterized in that: the concrete steps of described step 4 are: at first set up scaffold before the hanging cable below the otic placode of annular pressurized truss (1), workman's operating platform is set, utilize will wind up rope head and the construction tool of steadying line (9) of crane and construction hanging basket to winch to operation platform, wear bearing pin by the workman, the rope head of the steadying line (9) that will wind up is installed in the otic placode (8) of annular pressurized truss (1) and locates; Adopt the cord clip clamping steadying line (9) that winds up to lift during lifting, in order to avoid damage steadying line (9) outer jointing jacket that winds up; Wind up steadying line (9) stretching end to apart from other end truss otic placode (8) 2m place by hoist engine traction, it is in place that recycling tooling device and jack draw steadying line (9) stretching end that winds up, (12 other ends that will wind up steadying line (9) are fixed on otic placode (8) and locate, and the steadying line (9) that winds up this moment is in relaxed state to wear pin by the workman; A selected otic placode (8) is initial mounting points, two steadying lines that wind up (9) on this otic placode (8) at first are installed, other steadying lines that wind up (9) are installed after finishing in the direction of the clock successively, the steadying line that winds up (9) of rear installation is in the below of the mounted steadying line that winds up (9), determines according to this relative position.
4. the mounting method of a kind of roundabout Cable Truss Structure according to claim 3, it is characterized in that: the concrete steps of described step 5 are: after the steadying line that all winds up (9) installation, according to the order that steadying line (9) is installed all double-deck presser type anchor clamps nodes (13) on this rope are installed, described double-deck presser type anchor clamps node (13) comprises four layers of circular clamping plate (15,18,24,29), bolt (21,26) and otic placode (16), and circular clamping plate (15) downside of first floor is provided with an otic placode (16); The circular clamping plate of first and second layer (15,18) step up internal layer rope (19) by bolt (21); The circular clamping plate of third and fourth layer (24,29) clamp outer rope (30) by bolt (26); The circular clamping plate (18) of second layer inboard is provided with band mark of mouth groove (28), the 3rd layer of circular clamping plate (24) inboard is provided with band tooth projection (27), band mark of mouth groove (28) and band tooth protruding (27) thus can inlay the effect of playing fixed angle and node resistance to plucking; The circular clamping plate (15) of first floor and the circular clamping plate (18) of the second layer of the board-like anchor clamps node of Double-layer clamp (13) at first are installed during installation, place the rope groove (20) of the circular clamping plate of first floor (15) to locate on the internal layer rope (19) of the steadying line that winds up, bolt (21) is passed upper two screws (22) reserved of the circular clamping plate of first floor (15), at downside, this moment is nutting (23) not at circular clamping plate (15) upside of first floor, nut (23) for bolt (21) head; The circular clamping plate of the second layer (18) are divided into two from the centre, after the circular clamping plate of the second layer (18) are in place, turn the nut (23) of circular clamping plate (15) downside of first floor, clamp gently the circular clamping plate of first and second layer (15,18), but allow internal layer rope (19) slippage of clamping; Be in no hurry to when the circular clamping plate of the second layer (18) are installed two semicircle clamping plate are fitted, after the second layer and the 3rd layer of circular clamping plate (18,24) adjustment angle, fit again; The 3rd layer of circular clamping plate (24) are provided with two place's screws (25), at first bolt (26) is passed the screw (25) of the 3rd layer of circular clamping plate, bolt (26) termination is positioned at the 3rd layer of circular clamping plate (24) downside, then the band tooth projection (27) of the 3rd layer of circular clamping plate (24) is placed the band mark of mouth groove (28) of the circular clamping plate of the second layer (18); After the scale adjustment drag-line angle by the circular clamping plate of second and third layer (18,24) edge, two semicircle clamping plate chuckings of the circular clamping plate of the second layer (18) are fitted, the tooth of the circular clamping plate of second and third layer this moment (18,24) is interlocked, the angle that two-layer drag-line forms determines that node just can't rotate; Place the rope groove (31) of the 3rd layer of circular clamping plate (24) to locate on the outer rope (30) of the steadying line that winds up, placed in advance bolt (26) on the 3rd layer of circular clamping plate (24), the screw (32) of the 4th layer of circular clamping plate (29) is aimed at bolt (26) fits with the 3rd layer of circular clamping plate (24), also gently tighten at the 4th layer of circular clamping plate (29) outside mounting nuts (33) this moment, but allow outer rope (30) along rope groove (31) slippage; The double-deck presser type anchor clamps node (13) at steadying line crossover node place is installed successively according to clockwise direction.
5. the mounting method of a kind of roundabout Cable Truss Structure according to claim 4, it is characterized in that: the concrete steps of described step 6 are: be provided with otic placode (16) at the circular clamping plate downside of the first floor of double-deck presser type anchor clamps node (13), middle strut (10) top is provided with otic placode (17) equally, with the preformed hole alignment of both otic placodes (16,17), strut pin (14) passes preformed hole the two is fixed; The circular clamping plate (15) of first floor of the double-deck presser type anchor clamps node (13) of track cable (11) are installed in strut (10) lower end with same method, with the otic placode preformed hole alignment of the two, strut pin (14) passes preformed hole the two is fixed, and strut (10) is in free vacant state in the middle of this moment.
6. the mounting method of a kind of roundabout Cable Truss Structure according to claim 5, it is characterized in that: the concrete steps of described step 7 are: the wind up method of steadying line (9) of the method that lower edge track cable (11) is installed and installation is identical, the fixed end of lower edge track cable (11) is fixing by otic placode (8) and annular pressurized truss (1), by hoist engine traction lower edge track cable (11) stretching end to apart from other end truss otic placode (8) 2m place, recycling tooling device and jack traction lower edge track cable (11) stretching end is in place, wears bearing pin by the workman and the other end of lower edge track cable (11) is fixed on otic placode (8) locates; According to clockwise direction two lower edge track cables (11) that each otic placode (8) is located are installed successively; After track cable (11) installation, the circular clamping plate (18) of the second layer of double-deck presser type anchor clamps node (13) are installed at the flag node position, clamping plate are divided into two, after the circular clamping plate of the second layer (18) are in place, turn the nut (23) of circular clamping plate (15) downside of first floor, clamp gently the circular clamping plate of first and second layer (15,18), but allow internal layer rope (19) slippage of the lower edge track cable (11) of clamping; The band tooth projection (27) of the 3rd layer of circular clamping plate (24) is placed the band mark of mouth groove (28) of the circular clamping plate of the second layer (18), after the scale adjustment drag-line angle by the circular clamping plate of second and third layer (18,24) edge, two semicircle clamping plate chuckings of the circular clamping plate of the second layer (18) are fitted, and node just can't rotate; Place the rope groove (31) of the 3rd layer of circular clamping plate (24) to locate on the outer rope (30) of lower edge track cable (11), placed in advance bolt (26) on the 3rd layer of circular clamping plate (24), the screw (32) of the 4th layer of circular clamping plate (29) is aimed at bolt (26) fits with the 3rd layer of circular clamping plate (24), also gently tighten at the 4th layer of circular clamping plate (29) outside mounting nuts (33) this moment, but allow outer rope (30) along rope groove (31) slippage, all drag-lines in the Cable Truss Structure are in relaxed state at this moment, can not bear external load.
7. the mounting method of a kind of roundabout Cable Truss Structure according to claim 6, it is characterized in that: the concrete steps of described step 8 are: the stretch-draw of every cable body, adopt the mode of two jack synchronous tensions in parallel, the stretch-draw counterforce device of installing at Nodes must be solid and reliable and be easy to dismantle; Consider during stretch-draw that cable body is on the impact of the annular pressurized truss in outside (1), adopt the mode of symmetrical stretch-draw to control the distortion of annular pressurized truss, with fixed-direction grading tension in batches, stretching process is divided into level Four, first order stretch-draw is to 10% of target Suo Li, second level stretch-draw is to 30% of target Suo Li, and third level stretch-draw is to 70% of target Suo Li, the fourth stage is super be stretched to target Suo Li 105% to offset loss of prestress.
8. the mounting method of a kind of roundabout Cable Truss Structure according to claim 7, it is characterized in that: the concrete steps of described step 9 are: after whole cable body stretch-draw are complete, each node is checked, fine setting, confirm that the errorless hex bolts (33) of tightening afterwards is with the circular clamping plate of first floor (15) clamping of double-deck presser type anchor clamps node (13), to wind up steadying line (9), lower edge track cable (11) be fixed on that double-deck presser type anchor clamps node (13) locates can't slippage, namely install.
9. the mounting method of a kind of roundabout Cable Truss Structure according to claim 1 is characterized in that: described cable body adopts Galfan coating drag-line, and described ground tackle adopts fork ear muff cylinder adjustable type ground tackle, and described Cable Truss Structure is no less than 5 Pin.
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