CN101446068B - Method for erecting suspension bridge main girder by segmenting and jacking and adopted device for rolling and moving heavy objects - Google Patents
Method for erecting suspension bridge main girder by segmenting and jacking and adopted device for rolling and moving heavy objects Download PDFInfo
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- CN101446068B CN101446068B CN2008101366289A CN200810136628A CN101446068B CN 101446068 B CN101446068 B CN 101446068B CN 2008101366289 A CN2008101366289 A CN 2008101366289A CN 200810136628 A CN200810136628 A CN 200810136628A CN 101446068 B CN101446068 B CN 101446068B
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Abstract
The invention relates to a method for erecting a suspension bridge main girder by segmenting and jacking and a device adopted for rolling and moving heavy objects. The construction technique of erecting a suspension bridge steel truss girder comprises three processes: (1) the steel truss girder is assembled on a pedestal; (2) the steel truss girder is jacked horizontally and longitudinally by being pulled to two opposite directions; (3) the steel truss girder is lifted by adopting the existing and conventional non load-bearing moving deck erection gantry and is provided with a boom which is connected with a main cable. In the method of the invention, the suspension bridge main girder which spans across hundreds of meters or more than a thousand meters is divided into a plurality of segments and the main girder is erected by jacking the segments respectively by adopting the device for rolling and moving heavy objects which is matched with the main girder and is capable of jacking and horizontally moving a steel truss girder set weighing hundreds of tons or thousands of tons. The invention has the advantages that small total area is taken up, no bracket is needed inside a hole, technology is mature, safety and security can be ensured and construction speed is rapid. In addition, construction equipment can be used repeatedly or be rent and the amount of auxiliary steel can be reduced, thereby lowering construction cost greatly.
Description
Technical field
The present invention relates to a kind of method of erecting suspension bridge main truss and the equipment that is adopted, particularly a kind of method of segmentation jack-in erection suspension bridge main truss and the device for rolling and moving heavy objects that is adopted.
Background technology
Continuous girder bridge adopts incremental launching method, does not have occupation of land less, do not need support, convenient, the equipment advantage few, with low cost of construction safety in the hole, is the most competitive a kind of bridge formation technology in the medium and small span continuous girder bridge.Because incremental launching device and the restriction of girder span, the whole total length pushing tow of continuous girder bridge technology is difficult to be applied to the bridge construction of large span.Because incremental launching device and the restriction of girder span, the whole total length pushing tow of continuous girder bridge technology is difficult to be applied to the bridge construction of large span; Particularly so far, also not about adopt incremental launching method erecting suspension bridge main truss and can translation hundred kiloton weights the report of corollary equipment.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of method of segmentation jack-in erection suspension bridge main truss and the device for rolling and moving heavy objects that is adopted, method of the present invention is to be that hundreds of rice or the suspension bridge main truss beam more than the km are divided into multistage with span, and pushing tow sets up respectively piecemeal.
For solving the problems of the technologies described above, technical scheme of the present invention is: a kind of device for rolling and moving heavy objects, and the hoist cable chuck is fixed on the main push-towing rope, and hoist cable is fastened on the hoist cable chuck; Four hoist cables and last boatswain chair are fastenedly connected, and the lower end of adjusting rope with two discrepancy in elevation that last boatswain chair is fastenedly connected is fastenedly connected with the piston rod of vertical jack respectively, and vertical jack is installed in the cylinder bracket, and cylinder bracket is connected as a single entity with following boatswain chair; With vertically distribution beam is hinged, vertically the distribution beam both sides are hinged by the last hole of small clevis pin with head and roller formula change gear by big bearing pin for following boatswain chair, and roller rolls to cooperate and is installed in the slotted eye of roller formula change gear; With high-strength bolt the cast steel track is installed above steel truss girder, the roller of roller formula change gear rolls with the cast steel track and cooperates.
A kind of method that adopts above-mentioned device for rolling and moving heavy objects to carry out segmentation jack-in erection suspension bridge main truss, suspension bridge main truss are to be suspended on the main push-towing rope by the hoist cable that is fixed on the hoist cable chuck on the main push-towing rope and be fastened on the hoist cable chuck; Suspension bridge main truss total length is ∑ L, and the length of each internode steel truss is a, and it is that na, width are the steel truss section of B that n internode steel truss spelling becomes a segment length; Respectively organize m section steel truss in two sides, the left and right sides, the length overall of each spelling m section steel truss of two sides, the left and right sides is L=2 * na * m; Described erection method comprises three operations:
[1] spelling n internode steel truss on the spelling pedestal;
1. the rod member of suspension bridge main truss, gusset plate, carry out splitting into member unit again after the solid assembling in factory through quality inspection all in professional steel work factory process, are convenient to transport to the on-the-spot steel truss girder spelling pedestal that is positioned at two sides, the left and right sides of building bridge with train or automobile;
2. be provided with the portal jib crane that crane capacity is not less than 20 tons in spelling pedestal place, steel be installed at the portal jib crane top moulded rainproof, sun-proof builder's temporary shed and lighting device, to guarantee day and night to carry out continuously the steel truss girder consolidation service;
3. be the steel truss girder of n internode for every section with the portal jib crane spelling;
4. with high-strength bolt cast steel track and roller formula change gear are installed above steel truss girder, drag cable and level jack are installed in the below;
5. on three hoist cables in the place ahead of spelling pedestal, install boatswain chair, and fixing with vertical steel strand cable along the series connection of main push-towing rope direction;
6. the discrepancy in elevation of four vertical jack is adjusted rope and penetrated the following boatswain chair of suspension rod and fixing;
7. start level jack, the spelling steel truss girder is pulled out the spelling pedestal.
[2] the vertical pushing tow n of a double-way opposed-pulling level internode steel truss;
A. the device for rolling and moving heavy objects that adopts of preparatory process and installation;
1. it is directly identical with main push-towing rope that the back work cable of lift heavy 10t hangs striding of main rope, and main rope and main push-towing rope all are fastened on the cat head crossbeam, is positioned at each 1.5m place, the steel truss girder outside, each cover of upstream and downstream;
2. utilize the back work cable to be hung in assembly unit pedestal the place ahead, two sides 28
#, 29
#, 30
#Install boatswain chair in three hoist cables, the sinking support when releasing as steel truss girder;
3. described device for rolling and moving heavy objects and installation thereof comprise: the suspension rod and the last boatswain chair that are provided with hoist cable chuck and dynamic mount are fastenedly connected, and the upper end of the discrepancy in elevation being adjusted rope penetrates in the installing hole of boatswain chair, with the fastening location of intermediate plate anchor clamp; The lower end of discrepancy in elevation adjustment rope is fastenedly connected with the piston rod of the vertical jack that the adjustment discrepancy in elevation is used, and vertical jack is installed in the cylinder bracket, and cylinder bracket is connected as a single entity with following boatswain chair; Following boatswain chair is hinged with vertical distribution beam by big bearing pin;
4. with high-strength bolt the cast steel track is installed above steel truss girder, vertically the axis hole of distribution beam both sides is hinged by small clevis pin with head and roller formula change gear, and the roller of change gear rolls with the cast steel track and cooperates; Drag cable and level jack are installed below steel truss girder;
5. drag cable n root is installed in first section steel truss bottom in two sides, and wherein (n-2) root penetrates level jack.
B. the steel truss girder pushing tow goes out pedestal;
1. between on the assembly unit pedestal, bottom the steel truss girder, slipping block is set, uses horizontal jack tension steel truss girder bottom traction rope simultaneously, make the steel truss girder that is connected into sections shift out the assembly unit pedestal;
2. meanwhile, stretch-draw four the vertical jack of 150t that wind up down on the boatswain chair tighten up the discrepancy in elevation and adjust rope, until the leveling steel truss girder;
3. repeat above-mentioned two operations, make the long steel truss girder of 43.5m shift out the assembly unit pedestal gradually, entered all by the flexible vertical support state of hoist cable.
C. two sides double-way opposed-pulling pushing tow;
1. after the level jack in the place ahead, steel truss girder bottom is tightened up, steel hinge line is rolled with the rope dish; Loosen and the level jack at rear is corresponding, promptly emit steel hinge line at Suo Panshang.Forward and backward jack synchronous working is by computer digital system controlling level jack;
2. steel truss girder is to drawing in the pushing tow process, and along with the sagging distortion of main push-towing rope, the hoist cable respective change makes the purlin face injustice of steel truss girder, and the discrepancy in elevation of three row's suspension rods were adjusted ropes and should be adapted to variation by the adjusting of vertical jack this moment, to keep the level of purlin face absolute altitude; 12 discrepancy in elevation between last boatswain chair and the following boatswain chair are adjusted the change in length of rope and are controlled by the computer digital system;
3. above-mentioned " drag cable horizontally tracting " and " adjusting Suo Shuxiang heightens " two work are while, symmetry, evenly carry out, in fact because the speed of drag cable pushing tow is very slow, so not difficult in the operation; When advancing 14.5m, also to suspend pushing tow, will the work cable hang on the basket discrepancy in elevation of the place ahead roller formula change gear adjusted rope inject the place ahead on boatswain chair, and the corresponding plate hight difference adjustment of hanging oneself with the rear is sought the meaning and is taken off, and roller formula change gear moved to the place ahead, promptly roller formula change gear is taken out or feeds from the cast steel track.
D. the transfer of incremental launching device
Consider the quantity that reduces the construction gadget, the incremental launching device of steel truss girder of the present invention comprises that boatswain chair, following boatswain chair, vertical distribution beam, change gear and cast steel track have only two covers, left bank, each cover of right bank; Therefore, striden after the cable loop wheel machine installs, all be dismantled, hung the assembly unit pedestal of transporting two sides by part back with the work cable when first section steel truss girder puts in place.
[3] vertical-lift and installation steel case beam;
1. the middle part total length is after the steel truss girder of L=870m adopts the double-way opposed-pulling incremental launching method to move horizontally to put in place, to adopt existing conventional non-heavy burden walking to stride the cable loop wheel machine and promote steel truss girder, and the suspension rod that is connected with main push-towing rope for its installation;
2. the steel truss girder of the margin knot section of two sides does not need to set up with incremental launching method, adopts the existing conventional cable loop wheel machine of striding to promote the installation steel truss girder.
The total length ∑ L of suspension bridge main truss beam when the numerical value of n, a, m is decided by practice of construction, the numerical value of B is determined by actual needs.
The invention has the beneficial effects as follows:
1, the present invention is that suspension bridge main truss beam with large span is divided into multistage, adopts the device for rolling and moving heavy objects of supporting with it steel truss girder group that can pushing tow translation hundred kilotons, and pushing tow sets up piecemeal respectively that pushing tow sets up respectively piecemeal; Make the method for pushing frame purlin to be generalized to setting up span is hundreds of rice or the above suspension bridge of km; So far do not find the report of relevant technical scheme of the present invention both at home and abroad as yet.
2, the present invention have occupation of land less, do not need support, technology maturation, safe and reliable, advantage that speed of application is fast in the hole; And thereby construction equipment all can be reused or rent, save auxiliary steel using amount and reduces construction cost greatly.
Description of drawings
Fig. 1 is a vertical two-way pushing tow schematic diagram of sections steel truss girder.
Fig. 2 is the left view of Fig. 1.
Fig. 3 is the structural representation of device for rolling and moving heavy objects under the suspension rod.
Fig. 4 is the left view of Fig. 3.
The stereogram of Fig. 5 roller formula change gear.
The first section steel truss girder in Fig. 6 suspension bridge center is to drawing the incremental launching positioning schematic diagram.
Fig. 7 is that m section steel truss girder beam is to drawing the incremental launching positioning schematic diagram.
Fig. 8 is two abutment steel truss girder installation in position schematic diagrames.
The specific embodiment
The present invention is further described below in conjunction with drawings and Examples.
The girder total length of a deep mountain valleys suspension bridge is ∑ L=1000.5m, and the length of each internode steel truss 4 is a=14.5m, and it is the steel truss of na=3 * 14.5=43.5m that n=3 internode steel truss 4 spellings become a segment length, and its width is B=27m.Length overall behind each the spelling m=10 section steel truss 4 of two sides, the left and right sides successively is L=2 * na * m=2 * 43.5m * 10=870m＜suspension bridge main truss total length ∑ L=L+72.5m+58m=1000.5m.It is to set up with incremental launching method that also respectively there is the steel truss girder of the margin knot section of 72.5m and 58m two sides, and two sides can adopt the cable loop wheel machine of striding of a routine to install.
The suspension bridge main truss is to be suspended on the main push-towing rope 1 by the hoist cable 3 that is fixed on the hoist cable chuck 2 on the main push-towing rope 1 and be fastened on the hoist cable chuck 2.The construction technology of segmentation jack-in erection suspension bridge steel truss girder comprises three operations, shown in Fig. 6-8: 1. spelling steel truss girder 4 on spelling pedestal 22,2. sections steel truss girder 4 is carried out the vertical pushing tow translation of double-way opposed-pulling level, 3. the existing conventional cable loop wheel machine of striding of the back employing that puts in place promotes steel truss girder 4, and for it suspension rod 3 that is connected with main push-towing rope 1 is installed; The construction of three operation continuous synchronization constitutes a process cycles, first section steel truss girder pushing tow as shown in Figure 6, latter end steel truss girder pushing tow is as shown in Figure 8.
[1] 3 internode steel trusss 4 of spelling on spelling pedestal 22;
1. the rod member of suspension bridge main truss, gusset plate be all in professional steel work factory process, and through quality inspection, carry out splitting into member unit again after the solid assembling in factory, is convenient to transport to the on-the-spot steel truss girder spelling pedestal 22 that is positioned at two sides, the left and right sides of building bridge with train or automobile; The spelling pedestal longitudinal length of two sides should be greater than 58m, and width is greater than 40m;
2. be provided with the portal jib crane that crane capacity is not less than 20 tons in spelling pedestal 22 places, steel be installed at the portal jib crane top moulded rainproof, sun-proof builder's temporary shed and lighting device, to guarantee day and night to carry out continuously the steel truss girder consolidation service, with the quickening progress;
3. be the steel truss girder 4 of n internode for every section with the portal jib crane spelling;
4. with high-strength bolt 21 cast steel track 17 and roller formula change gear 16 are installed above steel truss girder 4, drag cable 5 and level jack 6 are installed in the below;
5. on three hoist cables 3 in the place ahead of spelling pedestal 22, install boatswain chair 9, and fixing with vertical steel strand cable 8 along the series connection of main push-towing rope direction;
The discrepancy in elevation that 6. will be fastened on four vertical jack 14 on the following boatswain chair 11 of first change gear 16 is adjusted rope 10 and is penetrated 30
#The following boatswain chair 11 of suspension rod is also fixing;
7. start level jack 6, spelling steel truss girder 4 is pulled out spelling pedestal 22.
[2] the horizontal pushing tow of double-way opposed-pulling;
A. the device for rolling and moving heavy objects that adopts of preparatory process and installation;
1. it is directly identical with main push-towing rope 1 that the back work cable of lift heavy 10t hangs striding of 7 main ropes, main rope and main push-towing rope 1 all are fastened on the cat head crossbeam, be positioned at each 1.5m place, the steel truss girder outside, each cover of upstream and downstream, promptly two overlap the back work cables to hang 7 center to center distance are B+2 * 1.5m=27+2 * 1.5m=30m;
2. utilize the back work cable to hang 7 in assembly unit pedestal the place ahead, two sides 28
#, 29
#, 30
#Install boatswain chair 9 in three hoist cables 3, the sinking support when releasing as steel truss girder 4;
3. described device for rolling and moving heavy objects and installation thereof comprise: the suspension rod 3 that is provided with hoist cable chuck 2 and dynamic mount is fastenedly connected with last boatswain chair 9, the upper end of the discrepancy in elevation of ten Ф 15.24 steel strand being adjusted rope 10 penetrates in the installing hole of boatswain chair 9, with the fastening location of intermediate plate anchor clamp; The lower end of discrepancy in elevation adjustment rope 10 is fastenedly connected with the piston rod of the vertical jack 14 that the adjustment discrepancy in elevation is used, and vertical jack 14 is installed in the cylinder bracket 13, and cylinder bracket 13 is connected as a single entity with following boatswain chair 11; Following boatswain chair 11 is hinged with vertical distribution beam 15 by big bearing pin 19;
4. with high-strength bolt 21 cast steel track 17 is installed above steel truss girder 4, vertically the axis hole of distribution beam 15 both sides is hinged by small clevis pin with head 20 and roller formula change gear 16, and the roller 18 of change gear 16 rolls with cast steel track 17 and cooperates; Drag cable 5 and level jack 6 are installed below steel truss girder 4;
5. first section steel truss 4 bottom side installed the guide line 12 of two perforations that are made of Ф 15.24 steel strand and the drag cable 5 that the six roots of sensation is made of Ф 15.24 steel strand in two sides, and six roots of sensation drag cable 5 penetrates level jack 6.
B. steel truss girder 4 pushing tows go out assembly unit pedestal 22;
1. on the assembly unit pedestal 22, steel truss girder is provided with slipping block between 4 bottoms, uses level jack 6 stretch-draw steel truss girder bottom traction ropes 5 simultaneously, makes steel truss girder 4 shift out assembly unit pedestal 22;
2. meanwhile, stretch-draw four the 150 tonnes vertical jack 14 that wind up down on the boatswain chair 8 tighten up the discrepancy in elevation and adjust rope 10, until leveling steel truss girder 4;
3. repeat above-mentioned two operations, make the long steel truss girder 4 of 43.5m shift out assembly unit pedestal 22 gradually, entered the state that all vertically hangs on main push-towing rope 1 by hoist cable 3 flexibilities.
C. two sides double-way opposed-pulling pushing tow;
1. after the level jack 6 in the place ahead, steel truss girder 4 bottom is tightened up, steel hinge line is rolled with the rope dish; And level jack 6 corresponding the loosening at rear are promptly emitted steel hinge line at Suo Panshang.Forward and backward jack 6 synchronous workings are by computer digital system controlling level jack 6;
2. steel truss girder 4 is to drawing in the pushing tow process, sagging distortion along with main push-towing rope 1, hoist cable 3 respective change, make the purlin face injustice of steel truss girder 4, the discrepancy in elevation of three row's suspension rods were adjusted ropes 10 and should be adapted to variations (discrepancy in elevation ± 50cm in) by the adjusting of vertical jack 14 this moment, with the level of maintenance purlin face absolute altitude; 12 discrepancy in elevation between last boatswain chair 9 and the following boatswain chair 11 are adjusted the change in length of rope 10 and are controlled by the computer digital system;
3. above-mentioned " drag cable horizontally tracting " and " adjusting Suo Shuxiang heightens " two work are while, symmetry, evenly carry out, in fact because the speed of drag cable pushing tow is very slow, so not difficult in the operation; When advancing 14.5m, also to suspend pushing tow, will the work cable hang on 7 Hanging Baskets discrepancy in elevation of the place ahead roller formula change gear 16 adjusted rope 10 inject the place aheads on boatswain chair 9, and corresponding last boatswain chair 9 discrepancy in elevation with the rear are adjusted rope 10 and are freed, and roller formula change gear 16 moved to the place ahead, promptly roller formula change gear 16 is taken out or feeds from cast steel track 17.
D. the transfer of incremental launching device;
1. the pushing tow speed of steel truss girder 4 was by one section calculating in one day, and promptly 43.5m/ days, first section pushing tow 435m needed ten days, and the tenth section only needs one day, and average speed is 6 days/section; So the total length L=870m that span centre is 20 sections, clean about 10 * 6=60 of pushing tow time days;
2. consider the quantity that reduces the construction gadget, the incremental launching device of steel truss girder of the present invention comprises that boatswain chair 9, following boatswain chair 11, vertical distribution beam 15, change gear 16 and cast steel track 17 have only two covers, left bank, each cover of right bank; Therefore, striden after the cable loop wheel machine installs, all be dismantled, hang 7 with the work cable and transport the assembly unit pedestal 22 of two sides back by part when first section steel truss girder puts in place.
[3] adopt non-heavy burden walking to stride the cable loop wheel machine and promote and install steel truss girder 4;
1. the middle part total length is after L=870m steel truss girder 4 adopts the double-way opposed-pulling incremental launching methods to move horizontally to put in place, adopts 400 tonnes of four non-heavy burdens walkings to stride the cable loop wheel machine and carry out steel truss girder 4 and promote, and the suspension rod 3 that is connected with main push-towing rope 1 for its installation;
2. two sides also remain the long margin knot section steel truss girder 4 of 72.5m and 58m and can not set up with incremental launching method, adopt existing non-heavy burden walking to stride the cable loop wheel machine steel truss girder 4 is installed.
Claims (2)
1. device for rolling and moving heavy objects that segmentation incremental launching method erecting suspension bridge main truss is adopted, it is characterized in that: hoist cable chuck (2) is fixed on the main push-towing rope (1), and hoist cable (3) is fastened on this hoist cable chuck (2); Four hoist cables (3) are fastenedly connected with last boatswain chair (9), the lower end of adjusting rope (10) with two discrepancy in elevation that boatswain chair on this (9) is fastenedly connected is fastenedly connected with the piston rod of vertical jack (14) respectively, this vertical jack (14) is installed in the cylinder bracket (13), and cylinder bracket (13) is connected as a single entity with following boatswain chair (11); Described boatswain chair (11) down is hinged with vertical distribution beam (15) by big bearing pin (19), these vertical distribution beam (15) both sides are hinged with the last hole of roller formula change gear (16) by small clevis pin with head (20), and roller (18) rolls to cooperate and is installed in the slotted eye of roller formula change gear (16); With high-strength bolt (21) cast steel track (17) is installed in steel truss girder (4) top, the roller (18) of roller formula change gear (16) rolls with cast steel track (17) and cooperates; In steel truss girder (4) below drag cable (5) and level jack (6) are installed.
2. method that adopts the described device for rolling and moving heavy objects of claim 1 to carry out segmentation jack-in erection suspension bridge main truss, the suspension bridge main truss is to be suspended on the main push-towing rope (1) by the hoist cable (3) that is fixed on the hoist cable chuck (2) on the described main push-towing rope (1) and be fastened on this hoist cable chuck (2), it is characterized in that: suspension bridge main truss total length is ∑ L, the length of each internode steel truss girder (4) is a, and it is that na, width are the steel truss girder section of B that n internode steel truss girder (4) spelling becomes a segment length; Each spelling m section steel truss girder (4) in two sides, the left and right sides, the length overall of each spelling m section steel truss girder (4) of two sides, the left and right sides is L=2 * na * m; The method of described segmentation jack-in erection suspension bridge main truss comprises three operations:
[1] goes up spelling n internode steel truss girder (4) at steel truss girder spelling pedestal (22);
1. the rod member of suspension bridge main truss, gusset plate are all in professional steel work factory process, through quality inspection, in factory, carry out splitting into member unit again after the solid assembling, be convenient to transport to the on-the-spot steel truss girder spelling pedestal (22) that is positioned at two sides, the left and right sides of building bridge and locate with train or automobile;
2. be provided with the portal jib crane that crane capacity is not less than 20 tons in steel truss girder spelling pedestal (22) place, steel be installed at the portal jib crane top moulded rainproof, sun-proof builder's temporary shed and lighting device, to guarantee day and night to carry out continuously the operation of steel truss girder spelling;
3. be the steel truss girder (4) of n internode for every section with the portal jib crane spelling;
4. with high-strength bolt (21) cast steel track (17) and roller formula change gear (16) are installed in steel truss girder (4) top, drag cable (5) and level jack (6) are installed in the below;
5. on three hoist cables in the place ahead (3) of steel truss girder spelling pedestal (22), install boatswain chair (9), and fixing with vertical steel strand cable (8) along the series connection of main push-towing rope direction;
6. the discrepancy in elevation of four vertical jack (14) is adjusted the described boatswain chair (11) and fixing down that rope (10) penetrates hoist cable (3);
7. start level jack (6), the steel truss girder (4) of spelling is pulled out steel truss girder spelling pedestal (22);
[2] the vertical pushing tow n of double-way opposed-pulling level internode steel truss girder (4);
A. preparatory process and described device for rolling and moving heavy objects is installed;
1. it is directly identical with main push-towing rope (1) that the back work cable of lift heavy 10t hangs striding of (7) main rope, and main rope and main push-towing rope (1) all are fastened on the cat head crossbeam, is positioned at each 1.5m place, the steel truss girder outside, each cover of upstream and downstream;
2. utilize the back work cable to hang (7) the place ahead 28 at two sides steel truss girder spelling pedestals (22)
#, 29
#, 30
#Install boatswain chair (9) in three hoist cables (3), the sinking support when releasing as steel truss girder (4);
The described device for rolling and moving heavy objects of pushing tow translation steel truss girder (4) 3. is installed; The hoist cable (3) that is provided with hoist cable chuck (2) and dynamic mount is fastenedly connected with last boatswain chair (9), and the upper end of the discrepancy in elevation being adjusted rope (10) penetrates in the installing hole of boatswain chair (9), with the fastening location of intermediate plate anchor clamp; The lower end of discrepancy in elevation adjustment rope (10) is fastenedly connected with the piston rod of the vertical jack (14) that the adjustment discrepancy in elevation is used, and vertical jack (14) is installed in the cylinder bracket (13), and cylinder bracket (13) is connected as a single entity with following boatswain chair (11); Following boatswain chair (11) is hinged with vertical distribution beam (15) by big bearing pin (19); With high-strength bolt (21) cast steel track (17) is installed in steel truss girder (4) top, vertically the axis hole of distribution beam (15) both sides is hinged by small clevis pin with head (20) and roller formula change gear (16), and the roller (18) of roller formula change gear (16) rolls with cast steel track (17) and cooperates; In steel truss girder (4) below drag cable (5) and level jack (6) are installed;
4. drag cable (5) n root is installed in first section steel truss girder (4) bottom in two sides, and wherein (n-2) root penetrates level jack (6);
B. steel truss girder (4) pushing tow goes out steel truss girder spelling pedestal (22);
1. last at steel truss girder spelling pedestal (22), steel truss girder (4) is provided with slipping block between the bottom, uses level jack (6) stretch-draw steel truss girder bottom traction rope (5) simultaneously, makes the steel truss girder (4) that is connected into sections shift out steel truss girder spelling pedestal (22);
2. meanwhile, stretch-draw last four the vertical jack of 150t of boatswain chair (11) (14) that wind up down tighten up the discrepancy in elevation and adjust rope (10), until leveling steel truss girder (4);
3. repeat above-mentioned two operations, make steel truss girder (4) shift out steel truss girder spelling pedestal (22) gradually, entered all by the flexible vertical support state of hoist cable (3);
C. two sides double-way opposed-pulling pushing tow;
1. after the level jack (6) in the place ahead, steel truss girder (4) bottom is tightened up, steel hinge line is rolled with the rope dish; And corresponding the loosening of the level jack at rear (6) promptly emitted steel hinge line at Suo Panshang; Forward and backward jack (6) synchronous working is by computer digital system controlling level jack (6);
2. steel truss girder (4) is to drawing in the pushing tow process, sagging distortion along with main push-towing rope (1), hoist cable (3) respective change, make the purlin face injustice of steel truss girder (4), this moment, the discrepancy in elevation adjustment rope (10) of three row's hoist cables should adapt to variation by the adjusting of vertical jack (14), to keep the level of purlin face absolute altitude; 12 discrepancy in elevation between last boatswain chair (9) and the following boatswain chair (11) are adjusted the change in length of rope (10) and are controlled by the computer digital system;
3. the in the double-way opposed-pulling pushing tow of top step C. two sides 1. step and the 2. two work of step be simultaneously, symmetry, evenly carry out, in fact because the speed of drag cable pushing tow is very slow, so not difficult in the operation; When advancing 14.5m, also to suspend pushing tow, to hang at the back work cable on (7) Hanging Basket the discrepancy in elevation of the place ahead roller formula change gear (16) is adjusted the last boatswain chair (9) that rope (10) injects the place ahead, and corresponding last boatswain chair (9) discrepancy in elevation with the rear is adjusted rope (10) and is freed, and roller formula change gear (16) moved to the place ahead, promptly roller formula change gear (16) is taken out or feeds from cast steel track (17);
D. the transfer of incremental launching device;
Consider the quantity that reduces the construction gadget, the incremental launching device of the steel truss girder in this programme (4), comprise that boatswain chair (9), following boatswain chair (11), vertical distribution beam (15), roller formula change gear (16) and cast steel track (17) have only two covers, left bank, each cover of right bank; Therefore, striden after the cable loop wheel machine installs, all be dismantled, hung (7) transport two sides back by part steel truss girder spelling pedestal (22) with the back work cable when first section steel truss girder (4) puts in place;
[3] vertical-lift and installation steel truss girder (4);
1. the middle part total length is after the steel truss girder (4) of L adopts the double-way opposed-pulling incremental launching method to move horizontally to put in place, to adopt existing conventional non-heavy burden walking to stride the cable loop wheel machine and promote steel truss girder (4), and the hoist cable (3) that is connected with main push-towing rope (1) for its installation;
2. the steel truss girder (4) of the margin knot section of two sides does not need to set up with incremental launching method, adopts the existing conventional cable loop wheel machine of striding to promote installation steel truss girder (4);
Described three operation continuous synchronization construction.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008101366289A CN101446068B (en) | 2008-12-25 | 2008-12-25 | Method for erecting suspension bridge main girder by segmenting and jacking and adopted device for rolling and moving heavy objects |
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| CN2008101366289A CN101446068B (en) | 2008-12-25 | 2008-12-25 | Method for erecting suspension bridge main girder by segmenting and jacking and adopted device for rolling and moving heavy objects |
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| CN101446068B true CN101446068B (en) | 2010-09-22 |
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Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102092635B (en) * | 2009-12-14 | 2013-03-20 | 上海市基础工程有限公司 | Track type self-advancing device |
| CN102102341B (en) * | 2009-12-18 | 2014-08-06 | 上海市机械施工集团有限公司 | Method for constructing viaduct deck |
| CN101831874B (en) * | 2010-05-27 | 2011-08-03 | 中铁大桥局集团第一工程有限公司 | Multipoint synchronous push construction method for porous large-span continuous steel truss girder |
| CN102888813B (en) * | 2012-08-20 | 2014-09-03 | 中铁二十三局集团有限公司 | Pulling and erecting method of truss girder |
| CN102877421B (en) * | 2012-09-17 | 2014-07-23 | 长沙理工大学 | Construction control method capable of realizing unstressed line shapes of pushing construction beam bodies at high accuracy |
| CN106284100B (en) * | 2016-10-13 | 2019-02-05 | 中交路桥华南工程有限公司 | The assembling method of steel truss girder segment and used assembled place |
| CN107313444B (en) * | 2017-08-07 | 2023-08-18 | 中机国能电力工程有限公司 | Double-slide rail beam type weight shifting device and shifting method |
| CN107245957B (en) * | 2017-08-16 | 2022-11-15 | 湖南路桥建设集团有限责任公司 | Method and equipment for erecting stiffening beam of suspension bridge in air without track |
| CN108708294B (en) * | 2018-07-11 | 2023-12-12 | 中铁大桥局集团第六工程有限公司 | Short slideway beam for pushing construction of unequal-section truss beam and pushing method |
| CN109235284A (en) * | 2018-11-30 | 2019-01-18 | 中交二公局第五工程有限公司 | A kind of construction equipment and method of no hoist cable beam section |
| CN110644377B (en) * | 2019-09-30 | 2021-01-12 | 中铁二院工程集团有限责任公司 | Roller type beam body pushing construction device |
| CN111646364B (en) * | 2020-04-27 | 2023-08-08 | 上海建工二建集团有限公司 | Monorail crane attached to overhanging structural plate and application and construction method thereof |
| CN114232504B (en) * | 2022-01-24 | 2023-06-20 | 岳西县彩虹瀑布旅游有限公司 | Construction method of glass trestle in scenic spot |
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Address after: 410004 Hunan province Changsha Yuhua District of Shaoshan City Road No. 239 Patentee after: Hunan Road & Bridge Construction Group Co., Ltd. Address before: 410004 Hunan province Changsha Yuhua District of Shaoshan City Road No. 239 Patentee before: Hunan Road & Bridge Construction Group Corp. |