CN105401523A - Hanging mounting method of long heavy stay cable under space limited condition - Google Patents
Hanging mounting method of long heavy stay cable under space limited condition Download PDFInfo
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- CN105401523A CN105401523A CN201510646387.2A CN201510646387A CN105401523A CN 105401523 A CN105401523 A CN 105401523A CN 201510646387 A CN201510646387 A CN 201510646387A CN 105401523 A CN105401523 A CN 105401523A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/16—Suspension cables; Cable clamps for suspension cables ; Pre- or post-stressed cables
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Abstract
The invention discloses a hanging mounting method of a long heavy stay cable under a space limited condition. The hanging mounting method comprises mounting of a first stay cable body on the center span side of a cable tower and a second stay cable body on the side span side of the cable tower and comprises the following steps of S10, tower end mounting of the first stay cable body; S20, beam end mounting of the first stay cable body; S30, tower end hard traction of the first stay cable body; S40, tower end mounting of the second stay cable body; S50, beam end mounting of the second stay cable body; and S60, synchronous different-place tensioning. A tower-first beam-second hanging manner is adopted in the stay cable bodies on the center span side and the side span side for hanging, and the problems that in the beam-tower end hanging scheme of the long heavy stay cable, during rear-tower-end hanging, traction force is too large, and safety is poor are solved. Meanwhile, beam end and tower end synchronous different-place tensioning is adopted, the problems that upper tower column space is small and narrow, and construction is difficult are solved, the phenomenon that when the stay cable bodies are tensioned each time, a set of tensioning extending rods are cut to be wasted is avoided, material waste is reduced, and the construction cost is reduced.
Description
Technical field
The present invention is used for technical field of bridge construction, and the long heavy suspension cable particularly related under a kind of limited space condition hangs mounting method.
Background technology
Bear pulling force in cable stayed bridge and the structural element mainly supported as girder, because suspension cable two ends hang construction in high-altitude or face sky, near water, its difficulty of construction is large, mounting method and technological requirement advanced, its work progress safety assurance is particularly important.
The hanging cable mode of suspension cable routine has " the first tower back rest hangs " and " after first beam, tower hangs " two kinds.
One, conventional suspension cable " after first beam, tower hangs " scheme: after suspension cable is transported to scene, through tower crane or crane barge or the lifting of ground large loop wheel machine to bridge floor exhibition rope dish, through Crossing the bridge noodles exhibition rope, utilize beam face automobile loop wheel machine, in suspension cable beam-ends anchor head anchor cup, hard draw bar is installed, with automobile loop wheel machine, anchor head and hard tension rod are put into cable guide pipe obliquely, under slide to hard tension rod at anchor plate in addition cap, beam face automobile loop wheel machine installs hard draw bar in oblique tensile tower end anchor cup, in hard draw bar front end, soft trailer system is installed again, tower top hoist engine and tower crane etc. coordinate the soft trailer system front end of lifting inclined guyed tower end of cable, continue the traction of soft trailer system front end to cable guide pipe, cable guide pipe is entered after adjustment, the traction of soft trailer system front end is to the jack on tower end anchor plate, work ground tackle on soft trailer system steel strand is installed after jack, carry out soft traction, continuing traction after adjustment makes suspension cable anchor head all carry out in cable guide pipe, continuing traction makes hard tension rod expose tower end anchor plate, bring anchor ring, proceed hard traction to certain safe distance, at the symmetrical grading tension suspension cable of tower top.
Two, conventional suspension cable " the first tower back rest hangs " scheme: after suspension cable is transported to scene, through tower crane or crane barge or the lifting of ground large loop wheel machine to bridge floor exhibition rope dish, through Crossing the bridge noodles exhibition rope, tower top hoist engine and tower crane etc. coordinate lifting inclined guyed tower end of cable anchor cup, carry out drawing and install into tower end cable guide pipe band cap, lower end adopts steel wire rope of windlass traction to cable guide pipe, soft traction is carried out after soft trailer system is installed, automobile loop wheel machine is utilized to promote anchor head adjustment angle, continuing traction makes anchor head all carry out in cable guide pipe, continue to draw the anchor plate under making anchor head expose beam, bring anchor ring, hard tension rod is installed, firmly draw certain distance, at the symmetrical grading tension suspension cable of tower top.
The shortcoming of prior art:
One, conventional suspension cable " after first beam, tower hangs " scheme shortcoming:
(1), long heavy suspension cable adopts " after first beam, tower hangs " scheme, if Suo Yuechang, during employing " rear tower hangs ", tractive force is larger, construct more dangerous, and the situation of steel strand unbalance stress is there will be when the soft traction of tower end, can successively fracture time serious, make the suspension cable Steel Bridge Deck that rebounds cause security incident.
(2), along with cable stayed bridge span is increasing, suspension cable diameter is increasing, Sarasota hanging cable length and highly also increasing, when causing tower end to hang, tractive force is also increasing, conventional equipment is used easily to occur the problem (wanting to obtain larger lifting traction force, then also more and more higher to the tonnage demand of tower top hoist engine) that upwards tractive force is inadequate.
(3), long heavy oblique tensile tower end hangs, and easily occurs the problem that soft draw operations space is inadequate, and the soft pulling equipment that specialized designs, manufacture match, and construction cost must be caused to have high input large increasing; If processing and remodelling is carried out repeatedly in soft for routine pulling equipment scene, operation is loaded down with trivial details, delays the duration, and often changes a social system processing, must cause damage, thus add construction safety risk to equipment itself.
(4), long heavy suspension cable adopts bridge floor exhibition rope, if exhibition rope is incomplete, when carrying out soft traction stretch-draw, cable body there will be back twist rotation, the steel strand of the soft Traction sysytem of tower end are driven together to rotate, and the tension ground tackle of steel strand rear end is arranged on stretch-draw jack rear end and top be pressed on jack, there will be frictional force between the two, thus restriction tension steel strand rotation, therefore tension steel strand may be made to twist off damage, occur security incident.
(5), conventional inclined guy cable stretching construction is that room symmetry is carried out in Sarasota, for long heavy inclined guy cable stretching, easily there is the constructional difficulties problem that upper king-post strut narrow space, tension rod intersect, if the tension rod of conflict is cut off in gradation during stretch-draw, then all cut useless one group of stretch-draw extension rod during each inclined guy cable stretching, must cause the waste of lot of materials, construction cost has high input to be increased greatly.
Two, conventional suspension cable " the first tower back rest hangs " scheme shortcoming:
(1), along with cable stayed bridge span is increasing, suspension cable diameter is increasing, Sarasota hanging cable length and highly also increasing, when causing tower end to hang, tractive force is also increasing, conventional equipment is used easily to occur the problem (wanting to obtain larger lifting traction force, then also more and more higher to the tonnage demand of tower top hoist engine) that upwards tractive force is inadequate.
(2), long heavy hanging at end of staying cable beam, in steel box-girder tuyere, space is little, and soft draw operations space is inadequate, and the soft pulling equipment that specialized designs, manufacture match, and construction cost must be caused to have high input large increasing; If processing and remodelling is carried out repeatedly in soft for routine pulling equipment scene, operation is loaded down with trivial details, delays the duration, and often changes a social system processing, must cause damage, thus add construction safety risk to equipment itself.
(3), long heavy suspension cable adopts bridge floor exhibition rope, if exhibition rope is incomplete, when carrying out soft traction stretch-draw, cable body there will be back twist rotation, the steel strand of the soft Traction sysytem of tower end are driven together to rotate, and the tension ground tackle of steel strand rear end is arranged on stretch-draw jack rear end and top be pressed on jack, there will be frictional force between the two, thus restriction tension steel strand rotation, therefore tension steel strand may be made to twist off damage, occur security incident.
(4), conventional inclined guy cable stretching construction is that room symmetry is carried out in Sarasota, along with beam-ends increases gradually apart from Sarasota distance, suspension cable and horizontal plane angle more and more less (oblique by abrupt change), during construction, stretch-draw extension rod rear end can intersect, for long heavy inclined guy cable stretching, there will be the constructional difficulties problem of upper king-post strut narrow space, tension rod intersection, if the tension rod of conflict is cut off in gradation during stretch-draw, then all cut useless one group of stretch-draw extension rod during each inclined guy cable stretching, must cause the waste of lot of materials, construction cost has high input to be increased greatly.
Summary of the invention
In order to solve the inadequate problem of bridge floor space exhibition rope of long heavy suspension cable, tractive force too large and unsafe problem when avoiding " rear tower end hangs " in long heavy suspension cable " after first beam, tower hangs " scheme, in order to solve " the rear beam-ends hangs " problem that the soft pull-up space of steel box-girder beam-ends is inadequate in " the first tower back rest hangs " scheme, in order to cable body when solving long heavy suspension cable soft traction stretch-draw reverse the problem that occurs steel strand fracture damage and in order to solve suspension cable synchronous symmetrical stretch-draw time upper king-post strut narrow space constructional difficulties problem, the long heavy suspension cable that the invention provides under a kind of limited space condition hangs mounting method.
The technical solution adopted for the present invention to solve the technical problems is: the long heavy suspension cable under a kind of limited space condition hangs mounting method, comprise the installation across the second suspension cable of the first suspension cable of side and Sarasota end bay side in Sarasota, comprise the following steps:
S10. the tower end of the first suspension cable is installed: on the tower end anchor cup of the first suspension cable, arrange the first tension rod, upwards draw the first suspension cable, first tension rod is entered and passes tower end cable guide pipe corresponding across side in Sarasota, install in tower and firmly draw tensioning equipment, and on the first tension rod, tighten the first secondary nut;
S20. the first suspension cable beam-ends install: in draw the first suspension cable across direction, the beam-ends anchor cup of the first suspension cable is made to enter corresponding beam-ends cable guide pipe, along beam-ends cable guide pipe traction beam-ends anchor cup, after beam-ends anchor cup passes beam-ends cable guide pipe to design attitude, tighten the second nut;
S30. the tower end of the first suspension cable draws firmly: draw the first suspension cable by traction tensioning equipment hard in tower along the tower end cable guide pipe across side in Sarasota, tighten the first secondary nut simultaneously, on tower end anchor cup, the first nut is tightened, until flat button worn by tower end anchor cup after first suspension cable stretches out tower end cable guide pipe;
S40. the tower end of the second suspension cable is installed: upwards draw the second suspension cable, make the tower end anchor cup of the second suspension cable enter tower end cable guide pipe corresponding to Sarasota end bay side, after the tower end anchor cup of the second suspension cable passes tower end cable guide pipe to design attitude, tighten the 3rd nut;
S50. the beam-ends of the second suspension cable is installed: on the beam-ends anchor cup of the second suspension cable, arrange the second tension rod, the second suspension cable is drawn to end bay direction, the second tension rod is made to enter corresponding beam-ends cable guide pipe, after the second tension rod passes beam-ends cable guide pipe, second tension rod is tightened the second secondary nut, firmly tensioning equipment is drawn under mounting edge span concrete beam, the second suspension cable is drawn along beam-ends cable guide pipe by traction tensioning equipment hard under end bay concrete beam, tighten the second secondary nut simultaneously, on beam-ends anchor cup, the 4th nut is tightened after second suspension cable stretches out beam-ends cable guide pipe, until flat button worn by beam-ends anchor cup,
S60. synchronous strange land stretch-draw: by firmly drawing tensioning equipment under traction tensioning equipment hard in tower and end bay concrete beam, synchronous symmetrical stretch-draw first suspension cable and the second suspension cable, until stretch-draw completes.
Be further used as the improvement of technical solution of the present invention, step S05. first suspension cable exhibition rope is also comprised: be arranged in by cable tray below Sarasota before step S10, first suspension cable lifting of rolling is placed on cable tray, and ensure that the beam-ends anchor cup one of the first suspension cable faces up placement, beam-ends anchor cup is pulled out and is placed on anchor head dolly, anchor head dolly is carried out exhibition rope to the girder front end traction away from Sarasota direction, between first suspension cable and girder bridge floor, interval 2m ~ 3m places one and puts rope dolly, and putting place mat rubber peel on rope dolly, traction is stopped when anchor head dolly is drawn to girder front end, cable tray is placed back in by after the first suspension cable lifting not yet launched above cable tray also upset aloft, to face up placement to make the tower end anchor cup one of the first suspension cable, open up rope construction in the air, first segment first tension rod is first filled in the tower end anchor cup of the first suspension cable, the pull rope installing tower top hoist engine inside upper Sarasota through in Sarasota across after tower end cable guide pipe corresponding to side, be connected with first segment first tension rod front end, tower top hoist engine and Sarasota construction tower crane is utilized to coordinate traction tower end anchor cup slowly to move up during aerial exhibition rope, coordinate the artificial cable tray that promotes to rotate simultaneously, until the first suspension cable stops suspension cable promoting when also surplus 2 circles do not launch on cable tray, last 2 circle first suspension cables adopt bridge floor automobile loop wheel machine to open up rope in the air and assist, the first suspension cable departing from cable tray arranges a suspension centre separately, adopt bridge floor automobile loop wheel machine to connect described suspension centre and promote the first suspension cable, until last 2 circle the first suspension cables are slowly promoted disengaging cable tray, cable tray is removed, then bridge floor automobile loop wheel machine slowly loose hook to fall back bridge floor, remove suspension centre, tower top hoist engine and Sarasota construction tower crane coordinate continuation upwards to promote tower end anchor cup, complete the first suspension cable exhibition rope.
Be further used as the improvement of technical solution of the present invention, in step S10, after first suspension cable exhibition rope completes, tower top hoist engine and Sarasota tower crane of constructing cooperatively interacts and is continued slowly upwards to draw by tower end anchor cup, utilize bridge floor hoist engine on the first suspension cable, arrange soft towing point to assist the first suspension cable launched to girder front end is drawn to Sarasota direction simultaneously, when tower top hoist engine and the Sarasota total lifting force upwards of tower crane of constructing is inadequate, and before in tower end anchor cup, first segment first tension rod is not with the first secondary nut, recycling bridge floor automobile loop wheel machine arranges the while that soft suspension centre coordinating together and upwards promotes on the first suspension cable, until first segment first tension rod enters in Sarasota across side tower end cable guide pipe, the first secondary nut is loaded onto at first segment first tension rod, remove tower top hoist engine, Sarasota construction tower crane and bridge floor automobile loop wheel machine, at first segment first tension rod afterbody, second section first tension rod is installed, install in tower and firmly draw tensioning equipment, hard traction tensioning equipment in tower is utilized to be transferred by second section first tension rod, second section first tension rod is tightened the first secondary nut.
Be further used as the improvement of technical solution of the present invention, in step S20, in girder, 1 tackle pulley is set across front end, direction, in first suspension cable beam-ends, soft towing point is set across front portion, direction, soft towing point is established and hangs another 1 tackle pulley, bridge floor steel wire rope of windlass is after 2 tackle pulley, fasten on the soft towing point of the first suspension cable, start bridge floor hoist engine and drag the first suspension cable, before treating beam-ends anchor cup to corresponding beam-ends cable guide pipe, 2 ~ 3m position stops, in the first suspension cable beam-ends anchor cup, crossover sub is installed, crossover sub installs steel strand, steel strand front end is penetrated beam-ends cable guide pipe, continue with the traction of bridge floor hoist engine, and adjust beam-ends anchor cup angle with bridge floor automobile loop wheel machine, until beam-ends anchor cup all enters beam-ends cable guide pipe, the traction of bridge floor hoist engine stops after steel strand pass beam-ends cable guide pipe, soft traction tensioning equipment in mid-span steel girder is installed, soft traction tensioning equipment in mid-span steel girder is utilized to draw the first suspension cable by steel strand, when beam-ends anchor cup exposes beam-ends cable guide pipe, screw installation second nut, continue traction, continue to screw the second nut simultaneously, until beam-ends anchor cup is drawn to design attitude.
Be further used as the improvement of technical solution of the present invention, in step S30, start hard traction tensioning equipment stretch-draw first suspension cable in tower, during stretch-draw, by the first secondary nut screwing clamping, on tower end anchor cup, tighten the first nut after first suspension cable stretches out tower end cable guide pipe, remove second section first tension rod therebetween, last until flat button worn by tower end anchor cup.
Be further used as the improvement of technical solution of the present invention, step S30, step S35. second suspension cable exhibition rope is comprised: the second suspension cable is directly held in place on the cable tray of end bay after bridge in the lifting of end bay position between S40, the tower end anchor cup of the second suspension cable is installed on anchor head dolly, below Sarasota, draw anchor head dolly carry out bridge floor exhibition rope, in the process of exhibition rope, between second suspension cable and girder bridge floor, interval 2m ~ 3m places one and puts rope dolly, and putting place mat rubber peel on rope dolly, traction is stopped when tower end anchor cup is drawn to and hangs position below Sarasota, the tower end starting to carry out the second suspension cable is installed.
Be further used as the improvement of technical solution of the present invention, in step S40, screw in the tower end anchor cup of the second suspension cable and towing plate is installed, the pull rope installing tower top hoist engine inside upper Sarasota through after tower end cable guide pipe corresponding to Sarasota end bay side, be connected with installation towing plate, on the second suspension cable, tower crane suspension centre is set with soft suspender belt simultaneously, utilizes tower top hoist engine and Sarasota construction tower crane to coordinate the upwards lifting carrying out the second suspension cable, simultaneously, utilize bridge floor hoist engine draw second suspension cable continue in across direction carry out bridge floor exhibition rope, after the second suspension cable remaining on cable tray all launches on bridge floor, second suspension cable is promoted in the air by now tower top hoist engine and the cooperation of Sarasota construction tower crane, bridge floor hoist engine continues traction residue cable body and moves to Sarasota direction, synchronously carry out tower end anchor cup to promote, when tower top hoist engine and the Sarasota total lifting force upwards of tower crane of constructing is inadequate, and before the second oblique tensile tower end anchor cup do not have band the 3rd nut, recycling bridge floor automobile loop wheel machine arranges the while that soft suspension centre coordinating together and upwards promotes on the second suspension cable, until the second oblique tensile tower end anchor cup traction tightens the 3rd nut after passing tower end cable guide pipe to design attitude corresponding to Sarasota end bay side.
Be further used as the improvement of technical solution of the present invention, in step S50, the beam-ends anchor cup of the second suspension cable arranges first segment second tension rod, in second suspension cable beam-ends anchor cup one end, soft distracted position is set, and hang 1 tackle pulley, another 1 tackle pulley is hung away from the side of Sarasota at the beam-ends cable guide pipe of correspondence, bridge floor steel wire rope of windlass is after 2 tackle pulley, fasten in the soft distracted position of the second suspension cable, start bridge floor hoist engine and drag the second suspension cable, before treating beam-ends anchor cup to corresponding beam-ends cable guide pipe, 2 ~ 3m position stops, in first segment second tension rod rear end, crossover sub is installed, crossover sub installs steel strand, steel strand front end is penetrated beam-ends cable guide pipe, continue with the traction of bridge floor hoist engine, and the angle of first segment second tension rod and beam-ends anchor cup is adjusted with bridge floor automobile loop wheel machine, until first segment second tension rod and beam-ends anchor cup all enter beam-ends cable guide pipe, continue with the traction of bridge floor hoist engine, stop after steel strand pass beam-ends cable guide pipe, the traction of bridge floor hoist engine stops, soft traction tensioning equipment under mounting edge span concrete beam, under utilizing end bay concrete beam, soft traction tensioning equipment draws the second suspension cable by steel strand, when first segment second tension rod exposes beam-ends cable guide pipe, screw the secondary nut of installation second, continue traction, continue to screw the second secondary nut until the secondary nut of first segment second tension rod second wears flat button simultaneously.
Be further used as the improvement of technical solution of the present invention, after the secondary nut of first segment second tension rod second wears flat button, soft traction tensioning equipment under dismounting end bay concrete beam, second section second tension rod is connected after first segment second tension rod, firmly tensioning equipment is drawn under mounting edge span concrete beam, the second suspension cable is drawn along beam-ends cable guide pipe by traction tensioning equipment hard under end bay concrete beam, on beam-ends anchor cup, the 4th nut is tightened, until flat button worn by beam-ends anchor cup after second suspension cable stretches out beam-ends cable guide pipe.
Beneficial effect of the present invention: all adopt " the first tower back rest hangs " mode to hang across side and end bay suspension cable once in the present invention, tractive force too large, unsafe problem when solving that after in long heavy suspension cable " after first beam, tower end hangs " scheme, tower end hangs.Simultaneously, because the layer between steel anchor beam is apart from little, narrow space in Sarasota, in across side and end bay, once suspension cable is all less with the angle of cut of horizontal plane, all when tower end stretching construction, tension rod rear end can intersect, in tower, space cannot meet the synchronous symmetrical stretching oblique drag-line of both sides jacking equipment, constructional difficulties, the present invention takes beam-ends and the synchronous strange land stretch-draw of tower end, upper king-post strut narrow space can be solved, the problem of constructional difficulties, avoid during each inclined guy cable stretching, all cutting useless one group of stretch-draw extension rod, reduce the waste of material, reduce construction cost.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the invention will be further described:
Fig. 1 draws beam-ends anchor cup schematic diagram when being the present invention first suspension cable exhibition rope;
Remainder cable body schematic diagram on cable tray when Fig. 2 is the present invention first suspension cable exhibition rope;
After residue cable body stands up when Fig. 3 is the present invention first suspension cable exhibition rope, prepare aerial exhibition rope schematic diagram;
Fig. 4 is the present invention first oblique tensile tower end scheme of installation;
Fig. 5 is bridge floor hoist engine traction schematic diagram during the present invention first suspension cable beam-ends is installed;
Fig. 6 is the present invention first suspension cable beam-ends scheme of installation;
Fig. 7 is the present invention second suspension cable exhibition rope schematic diagram;
Fig. 8 is the present invention second oblique tensile tower end scheme of installation;
Fig. 9 is the present invention second suspension cable synchronous strange land stretch-draw schematic diagram.
Detailed description of the invention
Referring to figs. 1 through Fig. 9, that show the concrete structure of the preferred embodiment of the present invention.To the design feature of the present invention each element be described in detail below, and if be described to direction (upper and lower, left and right, before and after) time, be with the structure shown in Fig. 9 for reference to describing, but actual user of the present invention is to being not limited thereto.
The long heavy suspension cable that the invention provides under a kind of limited space condition hangs mounting method, comprises the installation across the first suspension cable 3 of side and the second suspension cable 14 of Sarasota 2 end bay side in Sarasota 2, comprises the following steps:
S05. the first suspension cable 3 opens up rope: be arranged in by cable tray 1 below Sarasota 2, first suspension cable 3 lifting of rolling is placed on cable tray 1, and ensure that the beam-ends anchor cup one of the first suspension cable 3 faces up placement, beam-ends anchor cup is pulled out and is placed on anchor head dolly 4, anchor head dolly 4 is carried out exhibition rope to the girder 5 front end traction away from Sarasota 2 direction, between first suspension cable 3 and girder 5 bridge floor, interval 2m ~ 3m places one and puts rope dolly 6, and putting place mat rubber peel on rope dolly 6, traction is stopped when anchor head dolly 4 is drawn to girder 5 front end, now cable tray 1 goes back remainder cable body above, the first suspension cable 3 that cable tray 1 not yet launches above is lifted by crane and places back in cable tray 1 after upset aloft, to face up placement to make the tower end anchor cup one of the first suspension cable 3, open up rope construction in the air, first segment first tension rod is first filled in the tower end anchor cup of the first suspension cable 3, the pull rope installing tower top hoist engine 7 inside upper Sarasota through in Sarasota across after tower end cable guide pipe 8 corresponding to side, be connected with first segment first tension rod front end, tower top hoist engine 7 and Sarasota construction tower crane 9 is utilized to coordinate traction tower end anchor cup slowly to move up during aerial exhibition rope, coordinate the artificial cable tray 1 that promotes to rotate simultaneously, until first suspension cable 3 stops suspension cable promoting when also surplus 2 circles do not launch on cable tray 1, last 2 circle the first suspension cables 3 adopt bridge floor automobile loop wheel machine 10 to open up rope in the air and assist, the first suspension cable 3 departing from cable tray 1 arranges a suspension centre separately, adopt bridge floor automobile loop wheel machine 10 to connect described suspension centre and promote the first suspension cable 3, cable tray 1 is departed from until slowly promoted by last 2 circle the first suspension cables 3, cable tray 1 is removed, then bridge floor automobile loop wheel machine 10 slowly loose hook to fall back bridge floor, below cable body, bridge floor arranges large area geotextiles, prevent the first suspension cable 3 and beam face contact damage, remove suspension centre, tower top hoist engine 7 and Sarasota construction tower crane 9 coordinate continuation upwards to promote tower end anchor cup, complete the first suspension cable 3 and open up rope, so far, the first suspension cable 3 all exhibition rope completes, and tower top hoist engine 7 and the cooperation of Sarasota construction tower crane 9 continue upwards to promote to carry out the installation of tower end,
S10. the tower end of the first suspension cable 3 is installed: the first suspension cable 3 is opened up after rope completes, tower top hoist engine 7 and Sarasota tower crane 9 of constructing cooperatively interacts and is continued slowly upwards to draw by tower end anchor cup, utilize bridge floor hoist engine on the first suspension cable 3, arrange soft towing point to assist the first suspension cable 3 launched to girder 5 front end is drawn to Sarasota 2 direction simultaneously, note the speed of tower top hoist engine 7 rope closing and Sarasota construct tower crane 9 promote and the speeds match of bridge floor hoist engine good, traction safety is ensured to eliminate Sarasota construction tower crane 9 suspension centre horizontal force, when tower top hoist engine 7 and the Sarasota total lifting force upwards of tower crane 9 of constructing is inadequate, and before in tower end anchor cup, first segment first tension rod is not with the first secondary nut, recycling bridge floor automobile loop wheel machine 10 arranges the while that soft suspension centre coordinating together and upwards promotes on the first suspension cable 3, until first segment first tension rod enters in Sarasota across side tower end cable guide pipe 8, the first secondary nut is loaded onto at first segment first tension rod, remove tower top hoist engine 7, Sarasota construction tower crane 9 and bridge floor automobile loop wheel machine 10, screw at the internal thread of first segment first tension rod afterbody and second section first tension rod is installed, hard traction tensioning equipment 11 in tower is installed, hard traction tensioning equipment 11 in tower is utilized second section first tension rod to be transferred a segment distance to alleviate the bridge floor hoist engine of the first suspension cable 3 when beam-ends is installed and the tractive force of soft traction, second section first tension rod is tightened the first secondary nut,
S20. the beam-ends of the first suspension cable 3 is installed: in girder 5, arrange 1 tackle pulley across front end, direction, in first suspension cable 3 beam-ends, soft towing point is set across front portion, direction, soft towing point is established and hangs another 1 tackle pulley, bridge floor hoist engine 12 wire rope is after 2 tackle pulley, fasten on the soft towing point of the first suspension cable 3, start bridge floor hoist engine 12 and drag the first suspension cable 3, treat that beam-ends anchor cup stops 2 ~ 3m position to corresponding beam-ends cable guide pipe 13 above, in the first suspension cable 3 beam-ends anchor cup, crossover sub is installed, crossover sub installs steel strand, steel strand front end is penetrated beam-ends cable guide pipe 13, continuation bridge floor hoist engine 12 draws, and adjust beam-ends anchor cup angle for more than 10 time with bridge floor automobile loop wheel machine, until beam-ends anchor cup all enters beam-ends cable guide pipe 13, bridge floor hoist engine 12 draws and stops after steel strand pass beam-ends cable guide pipe 13, pass length and meet soft traction tensioning equipment Len req in installation mid-span steel girder.When beam-ends anchor cup enters beam-ends cable guide pipe 13, bridge floor automobile loop wheel machine 10 is utilized to promote the inclination angle that cable body progressively improves beam-ends anchor cup, make it consistent with beam-ends cable guide pipe 13 axis, the speed that this process commands the first suspension cable 3 to promote by special messenger, be strictly on guard against that beam-ends anchor cup screw thread is impaired.When beam-ends anchor cup all enters beam-ends cable guide pipe 13, beam-ends pipe conduit 13 lower port lays rubber peel or burlap bag, be strictly on guard against that traction later stage first suspension cable 3 directly contacts with beam-ends cable guide pipe 13 lower port and cause damage.Because main span side steel box-girder beam-ends suspension cable is anchored in tuyere, narrow space, soft draw operations space is inadequate, when steel box-girder processing and manufacturing, on the tuyere base plate of steel box-girder both sides, position, towing area arranges preformed hole in advance, after suspension cable installs, then it is complete to arrange professional electric welder to be welded by preformed hole.Soft traction tensioning equipment in mid-span steel girder is installed, in mid-span steel girder, soft traction tensioning equipment comprises stretch-draw spike, back-twist device, jack and instrument ground tackle, soft traction tensioning equipment in mid-span steel girder is utilized to draw the first suspension cable 3 by steel strand, it is first that many steel strand are isometric according to the length mark furnishing on steel strand before soft traction starts, can carry out with artificial or 270kN jack when adjusting long, start soft opening to draw system and carry out soft traction, when beam-ends anchor cup exposes anchor plate 60 ~ 70mm, screw installation second nut, to ensure later stage traction safety, continue soft traction, continue to screw the second nut simultaneously, until beam-ends anchor cup is drawn to design attitude tighten the second nut, remove soft traction tensioning equipment in mid-span steel girder, check the damage situations of steel strand surface, the degree depending on damage situations determines whether changing steel strand, so that the safety traction of next skew cables,
S30. the tower end of the first suspension cable 3 draws firmly: the soft traction of the beam-ends laggard row tower end that puts in place draws firmly, the first suspension cable 3 is drawn along the tower end cable guide pipe 8 across side in Sarasota by traction tensioning equipment 11 hard in tower, during stretch-draw, by the first secondary nut screwing clamping, on tower end anchor cup, the first nut is tightened after first suspension cable stretches out tower end cable guide pipe, remove second section first tension rod therebetween, last until flat button (namely the first nut outer end is twisted concordant with tower end anchor cup outer end) worn by tower end anchor cup, then carry out the first suspension cable 3 tower end pulling preparation;
S35. the second suspension cable 14 opens up rope: the second suspension cable 14 is directly held in place on the cable tray 1 of end bay after bridge in the lifting of end bay position, bridge floor automobile loop wheel machine 10 is utilized to be installed on anchor head dolly 4 by the tower end anchor cup of the second suspension cable 14, bridge floor steel wire rope of windlass below Sarasota 2 is released and is connected with anchor head dolly 4, startup bridge floor hoist engine draws anchor head dolly 4 and carries out bridge floor exhibition rope below Sarasota 2, in the process of exhibition rope, between second suspension cable 14 and girder 5 bridge floor, interval 2m ~ 3m places one and puts rope dolly 6, and putting place mat rubber peel on rope dolly 6, prevent cable body from contacting with beam face and cause damage, traction is stopped when tower end anchor cup is drawn to and hangs position below Sarasota 2, the tower end starting to carry out the second suspension cable 14 is installed,
S40. the tower end of the second suspension cable 14 is installed: screw in the tower end anchor cup of the second suspension cable 14 and install towing plate, the pull rope installing tower top hoist engine 7 inside upper Sarasota through after tower end cable guide pipe 15 corresponding to Sarasota end bay side, be connected with installation towing plate, on the second suspension cable 14, tower crane suspension centre is set with soft suspender belt simultaneously, utilizes tower top hoist engine 7 and Sarasota construction tower crane 9 to coordinate the upwards lifting carrying out the second suspension cable 14, simultaneously, utilize bridge floor hoist engine draw the second suspension cable 14 continue in across direction carry out bridge floor exhibition rope, bridge floor hoist engine draws when the second suspension cable 14 carries out bridge floor exhibition rope and adopts on cable body with special soft hanging belt binding, slowly draw exhibition rope to Sarasota direction, the speeds match noted constructing the speed of bridge floor hoist engine rope closing and Sarasota tower crane 9 promotes is good, after second suspension cable 14 remaining on cable tray 1 all launches on bridge floor, now tower top hoist engine 7 and Sarasota construction tower crane 9 coordinate and are promoted in the air by the second suspension cable 14, bridge floor hoist engine continues traction residue cable body and moves to Sarasota 2 direction, synchronously carry out tower end anchor cup to promote, when tower top hoist engine 7 and the Sarasota total lifting force upwards of tower crane 9 of constructing is inadequate, and before the second suspension cable 14 tower end anchor cup nut is not with the 3rd nut, recycling bridge floor automobile loop wheel machine 10 arranges the while that soft suspension centre coordinating together and upwards promotes on the second suspension cable 14, until the second suspension cable 14 tower end anchor cup traction tightens the 3rd nut after passing tower end cable guide pipe 15 to design attitude corresponding to Sarasota end bay side,
S50. the beam-ends of the second suspension cable 14 is installed: on the beam-ends anchor cup of the second suspension cable 14, arrange first segment second tension rod, in second suspension cable beam-ends anchor cup one end, soft distracted position is set, and hang 1 tackle pulley, another 1 tackle pulley is hung away from the side of Sarasota at the beam-ends cable guide pipe of correspondence, bridge floor steel wire rope of windlass is after 2 tackle pulley, fasten in the soft distracted position of the second suspension cable 14, start bridge floor hoist engine and drag the second suspension cable 14, treat that beam-ends anchor cup stops 2 ~ 3m position to corresponding beam-ends cable guide pipe 16 above, in first segment second tension rod rear end, crossover sub is installed, crossover sub installs steel strand, steel strand front end is penetrated beam-ends cable guide pipe 16, continue with the traction of bridge floor hoist engine, and the angle of first segment second tension rod and beam-ends anchor cup is adjusted with bridge floor automobile loop wheel machine 10, until first segment second tension rod and beam-ends anchor cup all enter beam-ends cable guide pipe 16, when first segment second tension rod and beam-ends anchor cup enter beam-ends cable guide pipe 16, utilize bridge floor automobile loop wheel machine 10 to promote inclination angle that cable body progressively carries first segment second tension rod and beam-ends anchor cup, make it consistent with beam-ends cable guide pipe 16 axis, the speed that this process commands cable body to promote by special messenger, be strictly on guard against first segment second tension rod and beam-ends anchor cup screw thread impaired, when beam-ends anchor cup all enters beam-ends cable guide pipe 16, beam-ends pipe conduit 16 lower port lays rubber peel or burlap bag, be strictly on guard against that traction later stage cable body directly contacts with beam-ends cable guide pipe lower port and cause damage.Continue with the traction of bridge floor hoist engine, stop after steel strand pass beam-ends cable guide pipe, bridge floor hoist engine draws, soft traction tensioning equipment under mounting edge span concrete beam, under end bay concrete beam, soft traction tensioning equipment is first isometric according to the length mark furnishing on steel strand by many steel strand before starting.Can carry out with artificial or 270kN jack when adjusting long.Under utilizing end bay concrete beam, soft traction tensioning equipment draws the second suspension cable 14 by steel strand, when first segment second tension rod exposes anchor plate 40 ~ 50mm under beam-ends cable guide pipe beam, screw the secondary nut of installation second, to ensure later stage traction safety, continue traction, continue to screw the second secondary nut simultaneously, until the secondary nut of first segment second tension rod second wears flat button, until after the secondary nut of first segment second tension rod second wears flat button, soft traction tensioning equipment under dismounting end bay concrete beam, check the damage situations of steel strand surface, degree depending on damage situations determines whether changing steel strand, so that the safety traction of next skew cables.Second section second tension rod is connected after first segment second tension rod, hard traction tensioning equipment 17 under mounting edge span concrete beam, the second suspension cable 14 is drawn along beam-ends cable guide pipe by traction tensioning equipment 17 hard under end bay concrete beam, on beam-ends anchor cup, the 4th nut is tightened after second suspension cable stretches out beam-ends cable guide pipe, every stretch-draw stroke, by the 4th nut screwing clamping, to ensure later stage stretch-draw safety, period removes second section second tension rod, until flat button worn by beam-ends anchor cup, namely the 4th nut outer end is twisted concordant with anchor cup outer end;
S60. synchronous strange land stretch-draw: by traction tensioning equipment 17 hard under traction tensioning equipment 11 hard in tower and end bay concrete beam, synchronous symmetrical stretch-draw first suspension cable 3 and the second suspension cable 14, until stretch-draw completes.
The present invention compared with prior art, has the following advantages:
(1) the present invention take bridge floor and in the air the mode of combining carry out exhibition rope, solve the inadequate problem of bridge floor space exhibition rope of long heavy suspension cable, avoid the safety problem that large radius bend by force turns around to hang, avoiding construction and scratching cable body, guaranteeing construction safety.
(2) take the rear beam-ends of " the first tower back rest hangs " scheme to hang to solve tractive force too large, unsafe problem when tower end hangs after in long heavy suspension cable " after first beam, tower end hangs " scheme.
(3) the multiple lifting means mode lifting inclined drag-line that cooperatively interacts is taked to carry out tower end and hang, to solve when first tower end hangs in suspension cable " the first tower back rest hangs " scheme the problem that tractive force is upwards inadequate, can avoid arranging super-tonnage hoist engine at tower top, decrease large-tonnage hoist engine Hoisting Security risk simultaneously.
(4) take steel box-girder tuyere base plate arrange preformed hole carry out " the first tower back rest hangs " afterwards beam-ends install time soft traction construction, the problem that soft draw operations space is inadequate can be solved, avoid design, manufacture special soft pulling equipment or conventional equipment is carried out processing and remodelling repeatedly, reduce construction cost, the processing construction period, and the safety of construction can be improved.
(5) take to install back-twist device additional bottom stretch-draw jack, can avoid when suspension cable does not open up rope back twist Hui Jing completely, during stretch-draw traction, suspension cable drives steel strand, jack etc. to twist, and occurs security incident.
(6) take beam-ends and the synchronous strange land stretch-draw of tower end, upper king-post strut narrow space can be solved, the problem of constructional difficulties, avoid during each inclined guy cable stretching, all cutting useless one group of stretch-draw extension rod, reduce the waste of material, reduce construction cost.
Certainly, the invention is not limited to above-mentioned embodiment, those of ordinary skill in the art also can make equivalent variations or replacement under the prerequisite without prejudice to spirit of the present invention, and these equivalent modification or replacement are all included in the application's claim limited range.
Claims (9)
1. the long heavy suspension cable under limited space condition hangs a mounting method, comprises the installation across the second suspension cable of the first suspension cable of side and Sarasota end bay side in Sarasota, it is characterized in that, comprise the following steps:
S10. the tower end of the first suspension cable is installed: on the tower end anchor cup of the first suspension cable, arrange the first tension rod, upwards draw the first suspension cable, first tension rod is entered and passes tower end cable guide pipe corresponding across side in Sarasota, install in tower and firmly draw tensioning equipment, and on the first tension rod, tighten the first secondary nut;
S20. the first suspension cable beam-ends install: in draw the first suspension cable across direction, the beam-ends anchor cup of the first suspension cable is made to enter corresponding beam-ends cable guide pipe, along beam-ends cable guide pipe traction beam-ends anchor cup, after beam-ends anchor cup passes beam-ends cable guide pipe to design attitude, tighten the second nut;
S30. the tower end of the first suspension cable draws firmly: draw the first suspension cable by traction tensioning equipment hard in tower along the tower end cable guide pipe across side in Sarasota, tighten the first secondary nut simultaneously, on tower end anchor cup, the first nut is tightened, until flat button worn by tower end anchor cup after first suspension cable stretches out tower end cable guide pipe;
S40. the tower end of the second suspension cable is installed: upwards draw the second suspension cable, make the tower end anchor cup of the second suspension cable enter tower end cable guide pipe corresponding to Sarasota end bay side, after the tower end anchor cup of the second suspension cable passes tower end cable guide pipe to design attitude, tighten the 3rd nut;
S50. the beam-ends of the second suspension cable is installed: on the beam-ends anchor cup of the second suspension cable, arrange the second tension rod, the second suspension cable is drawn to end bay direction, the second tension rod is made to enter corresponding beam-ends cable guide pipe, after the second tension rod passes beam-ends cable guide pipe, second tension rod is tightened the second secondary nut, firmly tensioning equipment is drawn under mounting edge span concrete beam, the second suspension cable is drawn along beam-ends cable guide pipe by traction tensioning equipment hard under end bay concrete beam, tighten the second secondary nut simultaneously, on beam-ends anchor cup, the 4th nut is tightened after second suspension cable stretches out beam-ends cable guide pipe, until flat button worn by beam-ends anchor cup,
S60. synchronous strange land stretch-draw: by firmly drawing tensioning equipment under traction tensioning equipment hard in tower and end bay concrete beam, synchronous symmetrical stretch-draw first suspension cable and the second suspension cable, until stretch-draw completes.
2. the long heavy suspension cable under limited space condition according to claim 1 hangs mounting method, it is characterized in that: also comprise step S05. first suspension cable exhibition rope before step S10: be arranged in by cable tray below Sarasota, first suspension cable lifting of rolling is placed on cable tray, and ensure that the beam-ends anchor cup one of the first suspension cable faces up placement, beam-ends anchor cup is pulled out and is placed on anchor head dolly, anchor head dolly is carried out exhibition rope to the girder front end traction away from Sarasota direction, between first suspension cable and girder bridge floor, interval 2m ~ 3m places one and puts rope dolly, and putting place mat rubber peel on rope dolly, traction is stopped when anchor head dolly is drawn to girder front end, cable tray is placed back in by after the first suspension cable lifting not yet launched above cable tray also upset aloft, to face up placement to make the tower end anchor cup one of the first suspension cable, open up rope construction in the air, first segment first tension rod is first filled in the tower end anchor cup of the first suspension cable, the pull rope installing tower top hoist engine inside upper Sarasota through in Sarasota across after tower end cable guide pipe corresponding to side, be connected with first segment first tension rod front end, tower top hoist engine and Sarasota construction tower crane is utilized to coordinate traction tower end anchor cup slowly to move up during aerial exhibition rope, coordinate the artificial cable tray that promotes to rotate simultaneously, until the first suspension cable stops suspension cable promoting when also surplus 2 circles do not launch on cable tray, last 2 circle first suspension cables adopt bridge floor automobile loop wheel machine to open up rope in the air and assist, the first suspension cable departing from cable tray arranges a suspension centre separately, adopt bridge floor automobile loop wheel machine to connect described suspension centre and promote the first suspension cable, until last 2 circle the first suspension cables are slowly promoted disengaging cable tray, cable tray is removed, then bridge floor automobile loop wheel machine slowly loose hook to fall back bridge floor, remove suspension centre, tower top hoist engine and Sarasota construction tower crane coordinate continuation upwards to promote tower end anchor cup, complete the first suspension cable exhibition rope.
3. the long heavy suspension cable under limited space condition according to claim 2 hangs mounting method, it is characterized in that: in step S10, after first suspension cable exhibition rope completes, tower top hoist engine and Sarasota tower crane of constructing cooperatively interacts and is continued slowly upwards to draw by tower end anchor cup, utilize bridge floor hoist engine on the first suspension cable, arrange soft towing point to assist the first suspension cable launched to girder front end is drawn to Sarasota direction simultaneously, when tower top hoist engine and the Sarasota total lifting force upwards of tower crane of constructing is inadequate, and before in tower end anchor cup, first segment first tension rod is not with the first secondary nut, recycling bridge floor automobile loop wheel machine arranges the while that soft suspension centre coordinating together and upwards promotes on the first suspension cable, until first segment first tension rod enters in Sarasota across side tower end cable guide pipe, the first secondary nut is loaded onto at first segment first tension rod, remove tower top hoist engine, Sarasota construction tower crane and bridge floor automobile loop wheel machine, at first segment first tension rod afterbody, second section first tension rod is installed, install in tower and firmly draw tensioning equipment, hard traction tensioning equipment in tower is utilized to be transferred by second section first tension rod, second section first tension rod is tightened the first secondary nut.
4. the long heavy suspension cable under limited space condition according to claim 3 hangs mounting method, it is characterized in that: in step S20, in girder, 1 tackle pulley is set across front end, direction, in first suspension cable beam-ends, soft towing point is set across front portion, direction, soft towing point is established and hangs another 1 tackle pulley, bridge floor steel wire rope of windlass is after 2 tackle pulley, fasten on the soft towing point of the first suspension cable, start bridge floor hoist engine and drag the first suspension cable, before treating beam-ends anchor cup to corresponding beam-ends cable guide pipe, 2 ~ 3m position stops, in the first suspension cable beam-ends anchor cup, crossover sub is installed, crossover sub installs steel strand, steel strand front end is penetrated beam-ends cable guide pipe, continue with the traction of bridge floor hoist engine, and adjust beam-ends anchor cup angle with bridge floor automobile loop wheel machine, until beam-ends anchor cup all enters beam-ends cable guide pipe, the traction of bridge floor hoist engine stops after steel strand pass beam-ends cable guide pipe, soft traction tensioning equipment in mid-span steel girder is installed, soft traction tensioning equipment in mid-span steel girder is utilized to draw the first suspension cable by steel strand, when beam-ends anchor cup exposes beam-ends cable guide pipe, screw installation second nut, continue traction, continue to screw the second nut simultaneously, until beam-ends anchor cup is drawn to design attitude.
5. the long heavy suspension cable under limited space condition according to claim 4 hangs mounting method, it is characterized in that: in step S30, start hard traction tensioning equipment stretch-draw first suspension cable in tower, during stretch-draw, by the first secondary nut screwing clamping, on tower end anchor cup, tighten the first nut after first suspension cable stretches out tower end cable guide pipe, remove second section first tension rod therebetween, last until flat button worn by tower end anchor cup.
6. the long heavy suspension cable under limited space condition according to claim 5 hangs mounting method, it is characterized in that: step S30, step S35. second suspension cable exhibition rope is comprised: the second suspension cable is directly held in place on the cable tray of end bay after bridge in the lifting of end bay position between S40, the tower end anchor cup of the second suspension cable is installed on anchor head dolly, below Sarasota, draw anchor head dolly carry out bridge floor exhibition rope, in the process of exhibition rope, between second suspension cable and girder bridge floor, interval 2m ~ 3m places one and puts rope dolly, and putting place mat rubber peel on rope dolly, traction is stopped when tower end anchor cup is drawn to and hangs position below Sarasota, the tower end starting to carry out the second suspension cable is installed.
7. the long heavy suspension cable under limited space condition according to claim 6 hangs mounting method, it is characterized in that: in step S40, screw in the tower end anchor cup of the second suspension cable and towing plate is installed, the pull rope installing tower top hoist engine inside upper Sarasota through after tower end cable guide pipe corresponding to Sarasota end bay side, be connected with installation towing plate, on the second suspension cable, tower crane suspension centre is set with soft suspender belt simultaneously, utilizes tower top hoist engine and Sarasota construction tower crane to coordinate the upwards lifting carrying out the second suspension cable, simultaneously, utilize bridge floor hoist engine draw second suspension cable continue in across direction carry out bridge floor exhibition rope, after the second suspension cable remaining on cable tray all launches on bridge floor, second suspension cable is promoted in the air by now tower top hoist engine and the cooperation of Sarasota construction tower crane, bridge floor hoist engine continues traction residue cable body and moves to Sarasota direction, synchronously carry out tower end anchor cup to promote, when tower top hoist engine and the Sarasota total lifting force upwards of tower crane of constructing is inadequate, and before the second oblique tensile tower end anchor cup do not have band the 3rd nut, recycling bridge floor automobile loop wheel machine arranges the while that soft suspension centre coordinating together and upwards promotes on the second suspension cable, until the second oblique tensile tower end anchor cup traction tightens the 3rd nut after passing tower end cable guide pipe to design attitude corresponding to Sarasota end bay side.
8. the long heavy suspension cable under limited space condition according to claim 7 hangs mounting method, it is characterized in that: in step S50, the beam-ends anchor cup of the second suspension cable arranges first segment second tension rod, in second suspension cable beam-ends anchor cup one end, soft distracted position is set, and hang 1 tackle pulley, another 1 tackle pulley is hung away from the side of Sarasota at the beam-ends cable guide pipe of correspondence, bridge floor steel wire rope of windlass is after 2 tackle pulley, fasten in the soft distracted position of the second suspension cable, start bridge floor hoist engine and drag the second suspension cable, before treating beam-ends anchor cup to corresponding beam-ends cable guide pipe, 2 ~ 3m position stops, in first segment second tension rod rear end, crossover sub is installed, crossover sub installs steel strand, steel strand front end is penetrated beam-ends cable guide pipe, continue with the traction of bridge floor hoist engine, and the angle of first segment second tension rod and beam-ends anchor cup is adjusted with bridge floor automobile loop wheel machine, until first segment second tension rod and beam-ends anchor cup all enter beam-ends cable guide pipe, continue with the traction of bridge floor hoist engine, stop after steel strand pass beam-ends cable guide pipe, the traction of bridge floor hoist engine stops, soft traction tensioning equipment under mounting edge span concrete beam, under utilizing end bay concrete beam, soft traction tensioning equipment draws the second suspension cable by steel strand, when first segment second tension rod exposes beam-ends cable guide pipe, screw the secondary nut of installation second, continue traction, continue to screw the second secondary nut until the secondary nut of first segment second tension rod second wears flat button simultaneously.
9. the long heavy suspension cable under limited space condition according to claim 8 hangs mounting method, it is characterized in that: after the secondary nut of first segment second tension rod second wears flat button, soft traction tensioning equipment under dismounting end bay concrete beam, second section second tension rod is connected after first segment second tension rod, firmly tensioning equipment is drawn under mounting edge span concrete beam, the second suspension cable is drawn along beam-ends cable guide pipe by traction tensioning equipment hard under end bay concrete beam, on beam-ends anchor cup, the 4th nut is tightened after second suspension cable stretches out beam-ends cable guide pipe, until flat button worn by beam-ends anchor cup.
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| CN109811889A (en) * | 2019-01-23 | 2019-05-28 | 中国五冶集团有限公司 | Saddle-shape cable net opens up rope installation method under the conditions of a kind of limited space |
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| CN109811889A (en) * | 2019-01-23 | 2019-05-28 | 中国五冶集团有限公司 | Saddle-shape cable net opens up rope installation method under the conditions of a kind of limited space |
| CN110258344A (en) * | 2019-07-03 | 2019-09-20 | 中交路桥华南工程有限公司 | Inclined guy cable stretching construction method |
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| CN113123240A (en) * | 2021-04-12 | 2021-07-16 | 中国建筑第八工程局有限公司 | Installation device for stay cable of special-shaped leaning tower and construction method thereof |
| CN114525739A (en) * | 2022-03-10 | 2022-05-24 | 中铁十二局集团有限公司 | Long and heavy cable hanging installation method for multipoint hanging of cable extending under bridge |
| CN114525739B (en) * | 2022-03-10 | 2023-10-13 | 中铁十二局集团有限公司 | Long heavy cable hanging installation method for multi-point hanging of under-bridge span cables |
| CN114673101A (en) * | 2022-04-24 | 2022-06-28 | 中铁十四局集团第三工程有限公司 | Construction method for replacing stay cable of long-term service steel cable-stayed bridge |
| CN114673101B (en) * | 2022-04-24 | 2023-09-29 | 中铁十四局集团第三工程有限公司 | Construction method for replacing stay cable of long-service steel cable-stayed bridge |
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Effective date of registration: 20180202 Address after: Nansha District Nansha street Guangzhou city Guangdong province 510032 Port Street No. 1 Port Avenue South of Hong Kong Air China court office building No. 1 room 2502 Co-patentee after: China Railway Guangzhou Engineering Bureau Group Bridge Engineering Co., Ltd. Patentee after: China Railway Guangzhou Engineering Bureau Group Co Ltd Address before: 510660 Guangzhou Science City, Guangdong Xiang Shan Road, No. 11 Co-patentee before: Bridge branch company of China Railway Port Channel Engineering Co., Ltd. Patentee before: China Railway Port and Channel Engineering Group Co., Ltd. |