CN101224856A - Long-span load-carrying cable lifting machine and mounting method therefor - Google Patents
Long-span load-carrying cable lifting machine and mounting method therefor Download PDFInfo
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- CN101224856A CN101224856A CNA2007101689736A CN200710168973A CN101224856A CN 101224856 A CN101224856 A CN 101224856A CN A2007101689736 A CNA2007101689736 A CN A2007101689736A CN 200710168973 A CN200710168973 A CN 200710168973A CN 101224856 A CN101224856 A CN 101224856A
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Abstract
The invention provides a long-span over loading cable crane and an installation method thereof which relates to a cable crane used in bridge construction and consists of a guy rope tower 1, a cable tower 2, a main cable and a hoisting traction system 3, an anchoring system 4, an electromechanical system 5 and a wind cable system 6. The tower of the cable crane consists of the guy rope tower 1 and the cable tower 2 which is hinged on the top of the guy rope tower 1 and fixedly connected with the bottom of the guy rope tower 1. The invention adopts the techniques of the parallel bearing of a plurality of main cables, the wind cables connected in series, the joint construction of the cable towel and the guy rope tower, etc., thereby greatly improving the loading capability of the long-span cable crane and lowering the manufacturing cost as much as possible. The invention can reduce the influence of the unbalanced horizontal force on the top of the cable tower 2 on the guy rope tower 1 and greatly save the construction cost of the guy rope tower 1. The loading cable crane has strong load-carrying capability, wide loading range and high economic performance.
Description
Technical field
The present invention relates to the long-span load-carrying cable lifting machine used in the construction of a kind of science of bridge building.
Background technology
Along with the development of domestic and international long span bridge girder segment operating technique, the beam bridge construction presents the batch production manufacturing, the trend that on-the-spot big sections is installed.Cable crane is as a kind of important equipment that transports in the bridge subsection construction with installation component, and can its lift heavy ability size be the key that realize that on-the-spot big sections is installed.The maximum rated lift heavy of present cable crane both domestic and external is 170t (a Chongqing E Gongyan Yangtze Bridge construction cable crane), development along with bridge construction, present cable crane lift heavy ability far from can meet requirements (dam length river, vegetable garden, Chongqing bridge steel truss girder is installed the heavy 280t of sections), presses for the lift heavy ability (specified lift heavy surpasses 280t) that significantly improves cable crane.
Because the lift heavy super large, long-span load-carrying cable lifting machine need be provided with many main ropes, and the difficult problem that many main ropes need to solve in carrying side by side is exactly how to allow many main ropes evenly stressed.To produce huge overbalance horizontal force on cable pylon top in the work of load-carrying cable loop wheel machine, and how can reduce the cost of cable pylon again as much as possible in control cat head off normal, this also is another main difficulty that faces in the cable crane design.
Summary of the invention
The objective of the invention is at above-mentioned present situation, it is strong to aim to provide a kind of load capacity, and the lift heavy scope is big, the long-span load-carrying cable lifting machine that economic performance is high.
The implementation of the object of the invention is, long-span load-carrying cable lifting machine, by knotted rope pylon 1, cable pylon 2, main rope and lifting traction system 3, anchor system 4, Mechatronic Systems 5, cable wind system 6 is formed, two groups of main rope 3-1 are arranged, every group of main rope is made up of many steel ropes, every group of main rope, back guy 6-2 one end is fixed on the anchor system 4, one end is fixed on the cable pylon 2, sport car 3-2 is on main rope 3-1, be cascaded with steel rope, sport car 3-2 upper hanger is provided with multiple tracks distribution beam 3-3, guy is connected into a ventilation cable 6-1 before the cable pylon 2, hoisting line 3-3 is around the polyspast of wearing sport car 3-2, and two ends enter hoisting winding 5-1 after walking around cat head, and trailing cable 3-4 movable pulley places on the sport car 3-2, fixed pulley is fixed in the cable column overhead, trailing cable 3-4 is alive, and head advances two sides rack winch 5-2 respectively, and cable pylon 2 is hinged on knotted rope pylon 1 top, is cemented in main bridge root at the bottom of knotted rope pylon 1 tower.
The installation method of long-span load-carrying cable lifting machine, concrete steps are as follows:
South anchorage 4-2, northern anchorage 4-1 construction, assembly unit knotted rope pylon 1,
Button tower dragline hangs, and ventilation cable 6-1, back guy 6-2 buckle that the tower dragline hangs, stretch-draw;
Assembly unit cable pylon 2 is with cable tower free bearing device 2-1 temporary consolidation;
Saddle and cat head turn to installation, and dragline is transferred to cable pylon 2 cats head from knotted rope pylon 1 cat head, and cable pylon cable wind rope tentatively hangs anchoring, the stretch-draw of cable tower guy, and knotted rope pylon 1 cat head is pre-to be provided with partially, and cable pylon 2 is hinged with knotted rope pylon 1;
Hang main rope 3-1, empty cable force of main rope and sag are accurately adjusted;
Trailing cable 3-4, track cable 3-3 go up knotted rope pylon 1, overhead traveling crane is installed, is divided the rope device, and 3-2 moves to span centre with sport car, adjust main rope 3-1 and ventilation cable 6-1, back guy 6-2.
Employing the present invention can reduce the influence of the overbalance horizontal force make-up Sarasota frame 1 on cable pylon 2 tops, the construction costs of saving knotted rope pylon 1 greatly; Main rope 3-1 is divided into two groups, form by many independent wire strands for every group, sport car 3-2 is bearing on the main bearing rope 3-1, be provided with 4 altogether, two sport car 3-2 are arranged on every group of main rope, be cascaded with steel rope, owing to be that many main rope 3-1 carry side by side, the problem of every main rope unbalance stress is very outstanding, by the multiple tracks distribution beam is set on the upper hanger of sport car 3-2, is beneficial to the force-transfer characteristic of single supported beam, make many main rope 3-1 evenly stressed, because heavy duty will produce huge cat head overbalance horizontal force in the work of this cable crane, by changing usually the method that each cable pylon all is provided with the front and back guy, the preceding guy of two cable pylons 2 is merged into a ventilation cable 6-1, can improve cable pylon 2 rigidity, reduce the cat head off normal, also reduce steel rope material usage and stretch-draw work capacity simultaneously.
Figure of description
Fig. 1 is this cable crane facade arrangement plan
Fig. 2 is this cable crane planar view
Fig. 3 is knotted rope pylon, cable pylon structure scheme drawing
Fig. 4 is a cable tower free bearing apparatus structure scheme drawing
Fig. 5 is the sport car arrangement plan
Fig. 6 is sport car upper hanger distribution beam figure
Fig. 7 is that hoisting line is arranged scheme drawing
Fig. 8 is that trailing cable is arranged scheme drawing
The specific embodiment
With reference to Fig. 1,2,3, this cable crane is by being made up of knotted rope pylon 1, cable pylon 2, main rope and lifting traction system 3, anchor system 4, Mechatronic Systems 5, cable wind system 6.
Be example with dam length river, vegetable garden, Chongqing bridge 420t cable crane below, auspiciously state the present invention:
1, cable pylon
2, main rope, lifting traction system and Mechatronic Systems
Be provided with two groups of main rope 3-1, every group of main rope is made up of 12 φ, 60 steel ropes, two groups of main rope spacing 34m, and single rope spacing is 240mm, is fixed type, construction period is not traversing.
With reference to Fig. 5,6,7,8, every line has two sport car 3-2, and totally four sport cars are bearing in respectively on the track cable 3-3.Spacing on every line between two sport car 3-2 is 8m, is cascaded with the steel rope of two φ 44.Every sport car has 48 traveling pulleys, is divided on two groups of track cable 3-3 that are bearing in 12 φ 60.Be furnished with traction running block and 5 fixed pulley groups that hoist at sport car 3-2 upper hanger, under sport car, be furnished with 4 running blocks that hoist on the hanger.Lifting pulley group multiplying power is 8.All pulleys all adopt the nylon manufacturing, and the weight of single nylon wheel is about the sixth of the steel wheel of equivalent diameter, have alleviated the weight of sport car 3-2 greatly.Sport car 3-2 upper hanger is provided with three road distribution beam 3-5, utilizes single supported beam power transmission uniform properties to satisfy the evenly stressed requirement of 12 main ropes.
Arrange a branch rope device 3-6 along spanning every 30m, divide between the rope device to link, and combine as a whole with sport car with bend hawsers, its along bridge to moving with sport car.Cable saddle 3-7 is arranged in (see figure 3) on the pylon of both sides, mainly is furnished with track cable wheel flutter, lifting mechanism deflection sheave and traction running mechanism assembly pulley on cable saddle.
Traction running mechanism 3-5 assembly pulley is made up of deflection sheave and fixed pulley group, and the traction multiplying power is 6.Finish traction work by the synchronous folding and unfolding of cable pylon both sides winch to sport car.
Track cable 3-3 deflection sheave group is made up of two groups of pulleys, and every group has 12 pulleys, and the track cable of 12 φ 60 of the every line of cable crane just is bearing on these 24 pulleys.Track cable 3-3 two ends are fixed on the agent structure of bridge two sides by earth anchor 4 respectively, and by the load-bearing assembly pulley sport car 3-2 are play supporting role.
Track cable 3-3 is designed to 2 15t winchs and walks 8 layouts.Hoisting winding 5-1 is arranged as: two sport car 3-2 of single line respectively have the independent hoisting system of a cover, 2 15t hoisting winding 5-1 of every sport car 3-2 configuration, and two sides are respectively arranged one.Hoisting winding 5-1 is placed on the Y structure back boom, the cat head of knotted rope pylon 1 in the vertical rope stretching.Cat head after turning to for 4 times from the saddle rope stretching, enter sport car 3-2 hanger assembly pulley up and down, the crown sheave group to be configured to upper hanger fixed 5, following hanger moving 4.Bicycle hanger is up and down walked 8 layouts, because of being that two ends are power end, then being equivalent to separate unit hoisting winding 5-1 and walking 4.
22t low speed winch 5-2 is selected in sport car 3-2 traction for use, arranges that to two ends 2 amount to 8 along the vertical bridge of every group of main rope 3-1, and it is 1300m that winch holds the rope amount.Select the hemp center wire line of φ 34 for use, the mode of traction of two sides to drawing adopted in sport car 3-2 vertical shift, and trailing cable 3-3 walks 6 and arranges, dead end is fixed on the lifting dolly, and the head of living advances two sides 22t rack winch respectively.Mode of traction: two sport car 3-2 on one group of main rope 3-1 are together in series, each two rack winch 5-2 of two sides, and a side is initiatively drawn, the passive traction of opposite side.
3, anchor system
With reference to Fig. 1,3, pile foundation is adopted on anchorage 4-1 basis, main rope north, and northern anchorage 4-1 adopts the hot-cast anchor to be connected with main rope 3-1, and is hinged by anchor case and anchor beam arm-tie; 15 bundles, 9 hole prestress wires are adopted in the anchoring of anchor beam and anchorage then, root P anchor, and this type of attachment has overcome the phenomenon of anchorage local pressure inequality, stress concentration in the past.
The south anchor: pile foundation is adopted on anchorage 4-2 basis, main rope south, and main rope 3-1 is connected on the anchorage with anchor pole by the anchor case with after wind cable 6-2.Main rope 3-1 Suo Li adjusts and all places southern anchor 4-2 to carry out, and initial tension adopts a winch and 5 dilatory main ropes of polyspast to finish, and accurately adjusts and realizes by 2 60t jack tension main rope termination finish rolling deformed bars.
4, cable crane cable wind system
Cable crane cable wind system 6 is mainly used to overcome the cable cat head to the overbalance horizontal force of span centre and control the cat head off normal.This cable wind system adopts two cable pylon guy series connection, improves rigidity, reduces the cat head off normal, also reduces cable wind rope material and stretch-draw work capacity simultaneously.
According to tentative calculation, after wind cable 6-2 selects 2 * (6+2)-φ, 52 steel ropes for use, single initial tension 42 t (wherein each 2 of upstream and downstream hang stretch-draw again after installing sport car); Preceding wind cable is ventilation cable 6-1, adopts 2 * 6-φ, 48 steel ropes, single initial tension 36t.Utilize jack tension to adjust large-tonnage guy rope force, more traditional winch band polyspast is more easy, and the Suo Li accuracy rate greatly improves.
Because cat head overbalance horizontal force is too big, main rope and sport car place span centre with sport car after installing, and stretch-draw cable tower wind cable 2-2 Φ 52 back guy 6-2 install the cat head horizontal force that sport car causes with balance again.
Claims (7)
1. long-span load-carrying cable lifting machine, it is characterized in that by knotted rope pylon (1), cable pylon (2), main rope and lifting traction system (3), anchor system (4), Mechatronic Systems (5), cable wind system (6) is formed, two groups of main ropes (3-1) are arranged, every group of main rope is made up of many steel ropes, every group of main rope, back guy (6-2) end is fixed on the anchor system (4), one end is fixed on the cable pylon (2), sport car (3-2) is on main rope (3-1), be cascaded with steel rope, sport car (3-2) upper hanger is provided with the multiple tracks distribution beam, guy is connected into a ventilation cable (6-1) before the cable pylon 2, track cable (3-3) is around the polyspast of wearing sport car (3-2), two ends enter hoisting winding (5-1) after walking around cat head, trailing cable (3-4) movable pulley places on the sport car (3-3), and fixed pulley is fixed in the cable column overhead, and trailing cable (3-4) head alive advances two sides rack winch (5-2) respectively, cable pylon (2) is hinged on knotted rope pylon (1) top, is cemented in main bridge root at the bottom of knotted rope pylon (1) tower.
2. long-span load-carrying cable lifting machine according to claim 1 is characterized in that knotted rope pylon (1) column is assembled by twin columns, three post fabricated universal steel memberss by medial and lateral, and cable crane (2) column is assembled by the single-column fabricated universal steel members.
3. long-span load-carrying cable lifting machine according to claim 1 is characterized in that cable crane is provided with two groups of main ropes (3-1), and every group of main rope is made up of 12 φ 60 steel ropes, two groups of main rope spacing 34m, and single rope spacing is 240mm, is fixed type.
4. long-span load-carrying cable lifting machine according to claim 1, it is characterized in that every sport car has 48 traveling pulleys, be divided on two groups of track cables (3-3) that are bearing in 12 φ 60, sport car (3-2) upper hanger is furnished with traction running block and 5 fixed pulley groups that hoist, and is furnished with 4 running blocks that hoist under sport car on the hanger.
5. long-span load-carrying cable lifting machine according to claim 1 is characterized in that northern anchorage (4-1) and main rope (3-1) adopt the hot-cast anchor to be connected, and is hinged by anchor case and anchor beam arm-tie.
6. 420t long-span load-carrying cable lifting machine according to claim 1 is characterized in that after wind cable (6-2) selects 2 * (6+2)-φ, 52 steel ropes for use, and single initial tension 42t, preceding wind cable are ventilation cable (6-1), adopts 2 * 6-φ, 48 steel ropes, single initial tension 36t.
7. the installation method of the described long-span load-carrying cable lifting machine of claim 1 is characterized in that concrete steps are as follows:
South anchorage (4-2), northern anchorage (4-1) construction, assembly unit knotted rope pylon (1),
Button tower dragline hangs, and ventilation cable (6-1), back guy (6-2) buckle that the tower dragline hangs, stretch-draw;
Assembly unit cable pylon (2) is with cable tower free bearing device (2-1) temporary consolidation;
Saddle and cat head turn to installation, dragline is transferred to cable pylon (2) cat head from knotted rope pylon (1) cat head, and cable pylon cable wind rope tentatively hangs anchoring, the stretch-draw of cable tower guy, knotted rope pylon (1) cat head is pre-to be provided with partially, and cable pylon (2) is hinged with knotted rope pylon (1);
Hang main rope (3-1), empty cable force of main rope and sag are accurately adjusted;
Trailing cable (3-4), track cable (3-3) are gone up knotted rope pylon (1), overhead traveling crane is installed, is divided the rope device, and (3-2) moves to span centre with sport car, adjust main rope (3-1) and ventilation cable (6-1), back guy (6-2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101689736A CN101224856A (en) | 2007-12-20 | 2007-12-20 | Long-span load-carrying cable lifting machine and mounting method therefor |
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|---|---|---|---|
| CNA2007101689736A CN101224856A (en) | 2007-12-20 | 2007-12-20 | Long-span load-carrying cable lifting machine and mounting method therefor |
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| CNA2007101689736A Pending CN101224856A (en) | 2007-12-20 | 2007-12-20 | Long-span load-carrying cable lifting machine and mounting method therefor |
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