CN105442458B - Method for hanging and installing stay cable of cable-stayed bridge special-shaped tower pillar - Google Patents
Method for hanging and installing stay cable of cable-stayed bridge special-shaped tower pillar Download PDFInfo
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- CN105442458B CN105442458B CN201610061845.0A CN201610061845A CN105442458B CN 105442458 B CN105442458 B CN 105442458B CN 201610061845 A CN201610061845 A CN 201610061845A CN 105442458 B CN105442458 B CN 105442458B
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- haulage cable
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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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- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a method for hanging and installing a stay cable of a cable-stayed bridge special-shaped tower pillar in a special construction environment. According to the method, a main load cable is taken as the stress body, and the main load cable is driven by power winches and load cables arranged on the beam surfaces of the two sides of a main tower to move in the obliquely vertical direction on the two sides of the tower pillar; when the distance between an anchor cup at the front end of the body of the stay cable in the air and the tower pillar is too small, the distance can be adjusted by means of the traction power winch and the load cable located on the same side as the stay cable. The hoisting system is small in occupied height, oblique hoisting can be achieved, the problems of conventional tower canes and tower top lifting frames that occupied height is large and only vertical hoisting can be achieved are effectively solved, and stay cable hoisting safety is guaranteed when the tower pillar is in a special shape.
Description
Technical field
The invention belongs to bridge building operations technical field, especially relate to the suspension cable of cable-stayed bridge abnormity king-post under a kind of special construction environment and hang installation method.
Background technology
During large span stayed-cable bridge stayed Cable Construction, because suspension cable deadweight is bigger, the other tower crane of tower can not meet the lifting requirements of suspension cable, now, at tower top, tower top suspension bracket can be set to carry out suspension cable lifting operation, and when Cable stayed Bridge Main Tower tower location is positioned at special region (such as near airports, there is the requirement of flight landing course line limit for height), the other tower crane of conventional tower and tower top suspension bracket, because of the restriction of oneself height, are all unsuitable for on-the-spot suspension cable lifting operation；Simultaneously, fast development along with bridge technology particularly technology for cable-stayed bridges, the version of Cable stayed Bridge Main Tower is more and more novel, such as sail shape king-post, the length causing the supporting cableway pipe of suspension cable is more and more longer, because suspension cable level lifting distance has big difference, certainly will select in the case of identical lifting weight the other tower crane of tower of big specification or hang greatly away from tower top suspension bracket, above-mentioned 2 diseconomies brought and insecurity and oblique tensile tower end lifting work cannot be completed.Accordingly, it would be desirable to study the suspension cable of abnormity king-post under a kind of special construction environment to hang installation method.
Summary of the invention
In view of this, the suspension cable that it is an object of the invention to provide a kind of special construction environment lower king-post strut abnormity hangs Method for Installation, this method avoid the defect of existing arrangement and method for construction, not only complete the construction difficult problem that existing arrangement and method for construction cannot complete, and improve the security reliability of construction.
For reaching above-mentioned purpose, the present invention is by the following technical solutions: the suspension cable of a kind of cable-stayed bridge abnormity king-post hangs installation method, the equipment that the method uses include tower top bracket, main haulage cable, two rack winches, two haulage cables, two tackle pulley, two pull device and two corner blocks, the method comprises the steps:
The first step, preparation: install tower top bracket at king-tower top, first rack winch and the second rack winch are installed on the girder of king-tower both sides, main haulage cable is placed on the rotation pulley at tower top bracket two ends, main haulage cable two ends connect the first tackle pulley and the second tackle pulley respectively, wherein the first tackle pulley connects the first haulage cable, second tackle pulley connects the second haulage cable, first tackle pulley connects the first rack winch by the first corner block, and the second tackle pulley connects the second rack winch by the second corner block；First pulls device and second pulls device and lays respectively on the main haulage cable on king-tower both sides.
Second step, the crank arm suspension cable installation method of side of king-tower is: the second rack winch loosens the second haulage cable, first rack winch tightens up haulage cable simultaneously, drives on main haulage cable first to pull device to directly over the anchor cup of suspension cable to be installed front end, beam face.
3rd step, first rack winch and the second rack winch loosen the first haulage cable and the second haulage cable simultaneously, on main haulage cable first is pulled device and transfers to beam face at suspension cable front end, pull the suspension centre that device arranges with suspension cable front end by first and be connected；.
4th step, second rack winch tightens up the second haulage cable, first rack winch loosens the first haulage cable in good time simultaneously, the first suspension cable front end pulling under device on main haulage cable is driven to be promoted in the air, when aerial suspension cable soon touch king-post crank arm time, second rack winch stops tightening up the second haulage cable, first rack winch tightens up the first haulage cable, driving on main haulage cable the first suspension cable front end pulling under device after outer side shifting 2～3m of cranking arm, the first rack winch stops tightening up the first haulage cable.Repeat above-mentioned action, be promoted to crank arm at cableway pipe corresponding to outside until the first rack winch coordinates traction the second rack winch to pull the suspension cable front end anchor cup under device by main haulage cable first.
5th step, pulls out anchor plate by suspension cable front end anchor cup along cableway pipe and anchor cup nut is screwed in design attitude on anchor cup, and oblique tensile tower end is installed and terminated.
6th step, the suspension cable installation method of king-tower straight king-post side is: the first rack winch loosens the first haulage cable, second rack winch tightens up the second haulage cable simultaneously, drives on main haulage cable second to pull device to directly over the anchor cup of suspension cable to be hung front end, beam face；
7th step, first rack winch and the second rack winch loosen the first haulage cable and the second rack winch simultaneously, on main haulage cable second pulls device transfer to suspension cable front end, beam face, pull the suspension centre that device arranges with suspension cable front end by second and be connected.
8th step, first rack winch tightens up the first haulage cable, second rack winch loosens the second haulage cable in good time simultaneously, drive the second suspension cable front end pulling under device on main haulage cable to be promoted in the air, be promoted at cableway pipe corresponding outside king-tower until pull the suspension cable front end anchor cup under device by main haulage cable second.
9th step, pulls out anchor plate by suspension cable front end anchor cup along cableway pipe and anchor cup nut is screwed in design attitude on anchor cup, and oblique tensile tower end is installed and terminated.
Further, the supporting leg position of described tower top bracket is with bolts with the reserved keyhole on stayed bridge pylon cable top.
Further, the first haulage cable and the second haulage cable are connected with main haulage cable with the movable pulley in the second tackle pulley, fixed pulley by the first tackle pulley.
The beneficial effect comprise that: in order to solve a suspension cable lifting difficult problem for special construction environment lower king-post strut abnormity, the main haulage cable of employing of the invention is as stress main body, main haulage cable is positioned on the angle pulley at tower top bracket two ends, the load born is delivered in king-post main body by tower top bracket, respectively arranging one at the two ends certain distance away from main haulage cable pulls device simultaneously, for promoting the suspension centre on the oblique pulling cable body of king-tower both sides, the two ends of main haulage cable are connected by assembly pulley and two groups of haulage cables and two traction power hoist engines respectively.Main haulage cable is driven to carry out oblique vertical motion in king-post both sides by the rack winch arranged on king-tower two curb girder face and haulage cable, when aerial oblique pulling cable body front end anchor cup is away from king-post hypotelorism, available being positioned at hangs rack winch that suspension cable homonymy arranges and this distance is adjusted by haulage cable.
This set Lift-on/Lift-off System takies the least, can carry out oblique lifting, effectively solves conventional tower crane, tower top suspension bracket takies highly big, the problem being only capable of carrying out vertical lifting, it is ensured that the construction safety of suspension cable lifting in the case of king-post abnormity.
The further advantage of the present invention, target and feature will be illustrated to a certain extent in the following description, and to a certain extent, will be apparent to those skilled in the art based on to investigating hereafter, or can be instructed from the practice of the present invention.
Accompanying drawing explanation
Fig. 1 is that in the present invention, the suspension cable of cable-stayed bridge abnormity king-post hangs operating diagram.
Detailed description of the invention
The present invention is further illustrated below in conjunction with the accompanying drawings.
As it is shown in figure 1, the equipment that the inventive method is used includes tower top bracket the 7, first rack winch the 1, second rack winch 12, main haulage cable 6, first pulls device 5, second pulls device the 8, first haulage cable the 3, first corner block the 2, first tackle pulley the 4, second haulage cable the 10, second corner block 11 and the second tackle pulley 9.
Before suspension cable enters the lifting operation stage, installing tower top bracket 7 on king-tower 13 top, the beam face of girder 16 is installed the first rack winch 1 and the second rack winch 12, two rack winches are separately mounted to king-tower 13 both sides.Main haulage cable 6 is through tower top bracket 7, and the first tackle pulley 4 and the second tackle pulley 9 are connected to the two ends of main haulage cable 6 respectively by movable pulley and fixed pulley.One end of first haulage cable 3 is connected with the first tackle pulley 4, and the other end is connected with the first rack winch 1 by the first corner block 2.One end of second haulage cable 10 connects the second tackle pulley 9, and the other end connects the second rack winch 12 by the second corner block 11.First pulls device 5 and second pulls device 8 and is separately mounted on two haulage cables.Pull the device relative position on main haulage cable 6 by adjusting two, meet the lifting requirements of full-bridge suspension cable.
After preparation completes, suspension cable is arranged on king-tower crank arm side, method is as follows: the rack winch 1,12 of king-tower 13 both sides cooperates, drive first on main haulage cable 6 to pull device 5 at the anchor cup of suspension cable to be installed front end, girder 16 beam face by the haulage cable 3,10 that connects respectively, pull the suspension centre that device 5 arranges with suspension cable 15 cable body front end by first and be connected.Second rack winch 12 tightens up the second haulage cable 10, first rack winch 1 loosens the first haulage cable 3 in good time simultaneously, suspension cable 15 front end pulled by main haulage cable 6 first under device 5 is promoted in the air, when aerial suspension cable 15 cable body soon touch king-post crank arm 14 time, second rack winch 12 stops tightening up the second haulage cable 10, first rack winch 1 starts to tighten up the first haulage cable 3, drives the on main haulage cable 6 first suspension cable 15 front end pulling under device 5 to 14 outer side shiftings 2～3m of cranking arm.
Repeat above-mentioned action, be promoted to crank arm at cableway pipe corresponding outside 14 until the first rack winch 1 coordinates the second rack winch 12 that first on main haulage cable 6 pulls the suspension cable 15 front end anchor cup under device 5.In tower, suspension cable front end anchor cup is pulled out anchor plate along cableway pipe and anchor cup nut is screwed in design attitude on anchor cup by operator, and oblique tensile tower end is installed and terminated.
Suspension cable is located at the installation method of king-tower straight king-post side: the rack winch 1,12 of king-tower both sides cooperates, drive on main haulage cable 6 second to pull device 8 at the anchor cup of suspension cable to be installed front end, beam face by haulage cable 3,10, pull the suspension centre that device 8 arranges with suspension cable 15 cable body front end by second and be connected.First rack winch 1 tightens up the first haulage cable 3, second rack winch 12 loosens the first haulage cable 10 in good time simultaneously, suspension cable 15 front end pulled by main haulage cable 6 second under device 8 is promoted in the air, until at cableway pipe corresponding to the outside that is promoted to the suspension cable front end anchor cup pulled on main haulage cable under device 8 to crank arm.In tower, suspension cable front end anchor cup is pulled out anchor plate along cableway pipe and anchor cup nut is screwed in design attitude on anchor cup by operator, and oblique tensile tower end is installed and terminated.
In the present embodiment, special construction environment lower king-post strut abnormity suspension cable hangs the distinguishing feature of Method for Installation and is, the tower top bracket whole height being located at king-post top is little, main stress carrier is main haulage cable, drawn by the cooperation of king-tower both sides rack winch, can be adjusted flexibly be fixed on main haulage cable pull device height in the air with the relative position between king-tower post, efficiently solve the construction difficult problem that construction limit for height requires lower king-post strut abnormity suspension cable to hang, it is ensured that the construction safety in suspension cable hoisting process.
To illustrate that, above-described embodiment is only in order to illustrate technical scheme and unrestricted, other amendment or equivalent that technical scheme is made by those of ordinary skill in the art, without departing from the spirit and scope of technical solution of the present invention, all should contain in the middle of scope of the presently claimed invention.
Claims (2)
1. the suspension cable of a cable-stayed bridge abnormity king-post hangs installation method, the equipment that the method uses include tower top bracket (7), main haulage cable (6), two rack winches, two haulage cables, two tackle pulley, two pull device and two corner blocks, it is characterized in that, the method comprises the steps:
The first step, tower top bracket (7) is installed at king-tower (13) top, the girder (16) of king-tower both sides is upper installs the first rack winch (1) and the second rack winch (12), main haulage cable (6) is placed on the rotation pulley at tower top bracket (7) two ends, main haulage cable (6) two ends connect the first tackle pulley (4) and the second tackle pulley (9) respectively, wherein the first tackle pulley (4) connects the first haulage cable (3), second tackle pulley (9) connects the second haulage cable (10), first tackle pulley (4) connects the first rack winch (1) by the first corner block (2), second tackle pulley (9) connects the second rack winch (12) by the second corner block (11)；First pulls device (5) and second pulls device (8) and lays respectively on the main haulage cable (6) on king-tower both sides；
Second step, second rack winch (12) loosens the second haulage cable (10), first rack winch (1) tightens up the first haulage cable (3) simultaneously, drives on main haulage cable (6) first to pull device (5) and arrives directly over the anchor cup of suspension cable to be installed front end, beam face；
3rd step, first rack winch (1) and the second rack winch (12) loosen the first haulage cable (3) and the second haulage cable (10) the most respectively, on main haulage cable (6) first is pulled device (5) and transfers to beam face at suspension cable (15) front end, pull the suspension centre that device (5) arranges with suspension cable (15) front end by first and be connected；
4th step, second rack winch (12) tightens up the second haulage cable (10), first rack winch (1) loosens the first haulage cable (3) in good time simultaneously, drive main haulage cable (6) upper first to pull the suspension cable front end under device (5) and be promoted in the air, when aerial suspension cable (15) soon touch king-post crank arm (14) time, second rack winch (12) stops tightening up the second haulage cable (10), first rack winch (1) tightens up the first haulage cable (3), drive the suspension cable front end that main haulage cable (6) upper first pulls under device (5) after (14) outer side shifting 2～3m of cranking arm, first rack winch (1) stops tightening up the first haulage cable (3)；Repeat above-mentioned action, until the first rack winch (1) coordinate traction the second rack winch (12) pull upper for main haulage cable (6) first the suspension cable front end anchor cup under device (5) be promoted to crank arm outside correspondence cableway pipe at；
5th step, pulls out anchor plate by suspension cable front end anchor cup along cableway pipe and anchor cup nut is screwed in design attitude on anchor cup, and oblique tensile tower end is installed and terminated；
6th step, first rack winch (1) loosens the first haulage cable (3), second rack winch (12) tightens up the second haulage cable (10) simultaneously, drives on main haulage cable (6) second to pull device (8) to directly over the anchor cup of suspension cable to be hung front end, beam face；
7th step, first rack winch (1) and the second rack winch (12) loosen the first haulage cable (3) and the second haulage cable (10) the most respectively, on main haulage cable (6) second pulls device (8) transfer to suspension cable front end, beam face, pull the suspension centre that device (8) arranges with suspension cable front end by second and be connected；
8th step, first rack winch (1) tightens up the first haulage cable (3), second rack winch (12) loosens the second haulage cable (10) in good time simultaneously, the suspension cable front end driving main haulage cable (6) upper second to pull under device (8) is promoted in the air, is promoted at cableway pipe corresponding outside king-tower until pull the suspension cable front end anchor cup under device (8) by upper for main haulage cable (6) second；
9th step, pulls out anchor plate by suspension cable front end anchor cup along cableway pipe and anchor cup nut is screwed in design attitude on anchor cup, and oblique tensile tower end is installed and terminated.
The suspension cable of a kind of cable-stayed bridge abnormity king-post the most according to claim 1 hangs installation method, it is characterised in that: the supporting leg position of described tower top bracket (7) is with bolts with the reserved keyhole on stayed bridge pylon cable top.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610061845.0A CN105442458B (en) | 2016-01-29 | 2016-01-29 | Method for hanging and installing stay cable of cable-stayed bridge special-shaped tower pillar |
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| CN201610061845.0A CN105442458B (en) | 2016-01-29 | 2016-01-29 | Method for hanging and installing stay cable of cable-stayed bridge special-shaped tower pillar |
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| CN105442458B true CN105442458B (en) | 2017-01-11 |
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| CN111101448B (en) * | 2020-01-08 | 2024-08-23 | 中铁大桥(郑州)缆索有限公司 | Quick traction equipment and traction method for stay cable beam end winch |
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