CN113152290B - System conversion device and conversion construction method of space cable surface self-anchoring suspension bridge - Google Patents
System conversion device and conversion construction method of space cable surface self-anchoring suspension bridge Download PDFInfo
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- CN113152290B CN113152290B CN202110382157.5A CN202110382157A CN113152290B CN 113152290 B CN113152290 B CN 113152290B CN 202110382157 A CN202110382157 A CN 202110382157A CN 113152290 B CN113152290 B CN 113152290B
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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
- E01D11/00—Suspension or cable-stayed bridges
- E01D11/02—Suspension 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
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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 system conversion device and a conversion construction method of a space cable surface self-anchoring suspension bridge, which are characterized in that: the bridge comprises a cross brace and a middle reaction frame which are arranged in the middle of a bridge body, and side span reaction frames which are arranged at two ends of the bridge body, wherein the cross brace is arranged on a main cable, and the reaction frames are arranged on stiffening girders of a bridge; the transverse support and the stiffening beam provided with the reaction frame are both provided with a pulley block and a winch for controlling the pulley block, and a main cable arranged in the catwalk is connected with a movable pulley of the pulley block. The main cable is outwards opened by adopting a structure of matching the cross brace, the reaction frame, the winch and the pulley changing set and drawing a drawing rope of the pulley block by the winch, so that the main cable is converted from a hollow cable shape state into a bridge linear state, and the problem of insufficient horizontal force is solved; the final bridge forming state is achieved and maintained by adjusting the cross brace, the reaction frame and the winch, the shape correcting process of the main cable is simplified, and the sling is convenient to install.
Description
Technical Field
The invention relates to the technical field of bridge engineering, in particular to a system conversion device and a conversion construction method of a spatial cable surface self-anchoring suspension bridge.
Background
According to a traditional parallel-cable-surface self-anchoring suspension bridge, a main cable and a sling are located in a vertical plane, namely, the main cable only has vertical sag and does not have transverse sag, and all the slings and cable clamps do not have transverse dip angles.
Compared with the traditional self-anchoring suspension bridge, the spatial self-anchoring suspension bridge has the characteristics that the surface formed by the main cable and the sling is a spatial curved surface, the main cable not only has vertical sag but also transverse sag, and the sling transverse bridge is inclined outwards from top to bottom and has different inclination angles.
The construction of the main cable of the space cable self-anchored suspension bridge has the following problems to be solved: the empty cable state after the main cable erects is planar linear, only vertical sag does not have horizontal sag, and the main cable is spatial linear under the bridge state that forms, and the position difference of both in horizontal bridge is very big. The horizontal bridge of cable clamp that later stage installation hoist cable clamp need be adjusted is great to the inclination, and the control degree of difficulty is high to can't insert the cable clamp otic placode as for the hoist cable otic placode, lead to the unable installation of hoist cable.
For the construction method for converting the main cable from the plane line shape to the space line shape, the currently adopted solution is to adopt a sling to transversely open the empty cable outwards so that the empty cable line shape approaches to the bridge line shape in the transverse bridge direction, then install a permanent sling, and finish the system conversion by stretching the sling.
For a spatial self-anchoring suspension bridge with a large main cable span ratio and a large transverse inclination angle, the conversion from a planar line shape to a spatial line shape of the main cable cannot be completed due to the limited horizontal force provided by the suspension cable.
Disclosure of Invention
The invention provides a system conversion device and a conversion construction method of a spatial cable-surface self-anchored suspension bridge aiming at the defects in the prior art, which can successfully convert a main cable with a large rise-span ratio and a large transverse inclination angle from a plane line shape to a spatial line shape, thereby smoothly completing system conversion.
The technical scheme adopted by the invention is as follows: a system conversion device and a conversion construction method of a space cable surface self-anchored suspension bridge are characterized in that: the bridge comprises a cross brace and a middle reaction frame which are arranged in the middle of a bridge body, and side span reaction frames which are arranged at two ends of the bridge body, wherein the cross brace is arranged on a main cable, and the reaction frames are arranged on stiffening girders of a bridge; the transverse support and the stiffening beam provided with the reaction frame are both provided with a pulley block and a winch for controlling the pulley block, and a main cable arranged in the catwalk is connected with a movable pulley of the pulley block.
According to the technical scheme, the cross brace mainly comprises a plurality of rectangular trusses which are connected with each other and triangular trusses which are arranged at the tops of two ends of a rectangular truss group; the fixed pulley of the pulley block is arranged on the triangular truss, the traction rope of the pulley block is connected with the winch, and the winch is arranged on the upper portion of the rectangular truss.
According to the technical scheme, the rectangular truss comprises two parallel trusses, each parallel truss comprises an upper chord and a lower chord which are arranged in parallel, and a first vertical rod and a first web member which are arranged between the upper chord and the lower chord, and the two parallel trusses are connected into a whole through a first cross rod and a first inclined strut.
According to the technical scheme, the triangular truss adopts symmetrical structure, unilateral triangular truss includes the first chord member of bottom mounting at the last chord member, first montant and second montant and is used for connecting the second web member at first montant bottom and first chord member middle part, the middle part at first chord member is fixed on the top of second montant, the top of the first montant of both sides links to each other through the connecting rod, and the connecting rod side links to each other with the top of the first chord member of both sides, the middle part of the first chord member of both sides links to each other through the second horizontal pole, the connecting rod intermediate position is equipped with the otic placode that is used for connecting the fixed pulley of assembly pulley.
According to the technical scheme, the middle reaction frame comprises a pair of first vertical supports arranged in parallel and a pair of second inclined supports arranged in parallel, the first vertical supports are vertically fixed on the stiffening beam, the top of each first vertical support is connected with one end of each second inclined support, and the other end of each second inclined support is fixed on the stiffening beam; a first lower parallel connection is arranged between the first vertical support and the second inclined support and between the second inclined supports, and the upper parts of the first vertical supports are connected through a first upper parallel connection; the fixed pulley of the pulley block is connected with the first upper parallel connection.
According to the technical scheme, the side span reaction frame comprises a pair of second vertical braces arranged in parallel and a pair of splayed third inclined braces, the second vertical braces are vertically fixed on the stiffening beam, the top of each second vertical brace is connected with one end of each third inclined brace, and the other end of each third inclined brace is fixed on the stiffening beam; a second lower parallel connection and a second upper parallel connection are arranged between the second vertical support and the third inclined support and between the third inclined supports, and the upper parts of the second vertical supports are connected through the second upper parallel connection; and a fixed pulley of the pulley block is connected with the second upper parallel connection.
According to the technical scheme, firstly, a bridge tower and a stiffening beam are constructed, then a catwalk is erected, a main cable is erected on the catwalk to form a hollow cable shape, and after the main cable is tightened, the catwalk is lifted to the main cable by a lifting rope; step two, arranging two groups of cross braces and a group of middle reaction frames on the midspan, and respectively arranging a group of side span reaction frames on the side spans on the two sides; thirdly, arranging a winch and a pulley block on the transverse brace and a stiffening beam for placing the reaction frame, and dragging and spreading the main cable from the hollow cable shape position to a bridge forming position by utilizing a winch traction pulley; step four, installing the slings in batches and tensioning the slings in place, and dismantling the cross braces and the reaction frames after completing system conversion; and fifthly, performing main cable anticorrosion construction, dismantling catwalks, and performing bridge deck auxiliary facility construction until bridge construction is completed.
According to the technical scheme, in the first step, the catwalk is divided into a left catwalk and a right catwalk, and the left catwalk and the right catwalk at the midspan are integrated by adopting connecting pieces in the shape state of the hollow cable; in the third step, before the main cable is spread, the connecting piece and the wind-resistant cable between the middle-span catwalks need to be removed, and the handrail ropes of the catwalks are changed to the positions of the bearing ropes.
According to the technical scheme, in the second step, one group of middle reaction frames are located at the position of the midspan 1/2, two groups of cross braces are located at the positions of the midspan 1/4 and the midspan 3/4 respectively, and two groups of side span reaction frames are located at the position of the side span 1/4.
According to the technical scheme, in the fourth step, in order to facilitate installation of the sling, the positions of the adjacent cross brace and the reaction frame can be properly adjusted, so that the main cable is suitable for installation of the sling and the angle of the cable clamp.
The beneficial effects obtained by the invention are as follows:
the invention adopts a structure matched with a cross brace, a reaction frame, a winch and a pulley block, and the main cable is outwards expanded by a traction rope of the pulley block drawn by the winch, so that the shape of the main cable is converted into a bridge line shape from a hollow cable, and the problem that the conversion of the main cable from a plane line shape to a space line shape cannot be completed due to limited horizontal force is solved; in addition, the final bridge forming state is achieved and the state is kept by adjusting the cross brace, the reaction frame and the winch, compared with the background art, the shape correction process of the main cable is greatly simplified, the problem that the sling ear plate is not easy to insert into the cable clamp ear plate is solved, and the installation process of the sling is optimized.
Drawings
The specification includes the following eighteen figures:
FIG. 1 is a schematic diagram of the arrangement of the apparatus of the present invention in elevation in a spatial self-anchoring suspension bridge;
FIG. 2 is a schematic plan view of the spatial self-anchoring suspension bridge with the apparatus of the present invention;
FIG. 3 is an elevational schematic view of the cross-brace of the present invention in the main cable empty cable stage;
FIG. 4 is an elevational schematic view of the wale of the present invention in a main cable bridging line stage;
FIG. 5 is a schematic plan view of the cross brace of the present invention;
FIG. 6 is a schematic view of the present invention;
FIG. 7 is a schematic view of the construction of the side span reaction frame of the present invention;
FIG. 8 is a schematic elevation of a rectangular truss of the present invention;
FIG. 9 is a schematic plan view of a rectangular truss of the present invention;
FIG. 10 is a schematic elevation view of a triangular truss of the present invention;
FIG. 11 is a side schematic view of a triangular truss of the present invention;
FIG. 12 is a schematic plan view of a triangular truss of the present invention;
FIG. 13 is a schematic elevational view of the intermediate reaction frame of the present invention;
FIG. 14 is a side schematic view of the intermediate reaction frame of the present invention;
FIG. 15 is a schematic plan view of the intermediate reaction frame of the present invention;
FIG. 16 is a schematic side span reaction frame elevation view of the present invention;
FIG. 17 is a side schematic view of an edge span reaction frame of the present invention;
FIG. 18 is a schematic plan view of an edge span reaction frame of the present invention;
in the figure: 1. a cross brace; 3. a main cable; 4. a sling; 5. a stiffening beam; 6. a bridge tower; 7. a catwalk; 8. a winch; 9. a pulley block 9-1 and a movable pulley; 9-2, a fixed pulley; 9-3, a traction rope; 11. a rectangular truss; 12. parallel trusses; 13. an upper chord; 14. a lower chord; 15. a first upright rod; 16. a first web member; 17. a first cross bar; 18. a first diagonal brace; 21. a triangular truss; 22. a first chord; 23-1, a first vertical bar; 23-2, a second vertical bar; 24. a second web member; 25. a second cross bar; 26. a connecting rod; 27. an ear plate; 31. a middle reaction frame; 32. a first vertical support; 33. a second diagonal brace; 34. a first upper parallel connection; 35. a first lower parallel connection; 41. a side span reaction frame; 42. a second vertical support; 43. a third diagonal brace; 44. a second upper parallel connection; 45. the middle part is connected in parallel; 46. and the second lower parallel connection.
Detailed Description
The invention will be further explained with reference to the drawings.
As shown in fig. 1 to fig. 7, the present embodiment provides a system conversion device and a conversion construction method for a spatial cable surface self-anchored suspension bridge, including a cross brace 1 and a middle reaction frame 31 disposed in the middle of a bridge body, and side span reaction frames 41 disposed at two ends of the bridge body. The cross brace 1 is hung on the main cable 3 through a steel wire rope, and the reaction frames 34 and 41 are fixed on the stiffening beam 5 on the bridge body. The transverse support 1 is also provided with a pulley block 9 and a winch 8 for controlling the pulley block 9; a movable pulley 9-1 of a pulley block 9 is connected with a main cable 3 arranged in a catwalk 7, a fixed pulley 9-2 of the pulley block 9 is arranged on a cross brace 1 and reaction frames 31 and 41, a traction rope 9-3 of the pulley block 9 is fixed on a winch 8, and the winch 8 can pull the main cable 3 open through the traction rope 9-3 to complete the linear conversion of the main cable 3.
As shown in fig. 8 to 12, the wale 1 is mainly composed of a plurality of sections of rectangular trusses 11 connected with each other and triangular trusses 21 disposed at the tops of two ends of the group of rectangular trusses 11, and the rectangular trusses 11 are connected by flanges. The fixed pulley 9-2 of the pulley block 9 is arranged on the triangular truss 21, the traction rope 9-3 of the pulley block 9 is connected with the winch 8, and the winch 8 is fixed on the upper part of the rectangular truss 11. The rectangular truss 11 comprises two parallel trusses 12, each parallel truss 12 comprises an upper chord 13 and a lower chord 14 which are arranged in parallel, and a first vertical rod 15 and a first web member 16 which are arranged between the upper chord 13 and the lower chord 14, and the two parallel trusses 12 are connected into a whole through a first cross rod 17 and a first inclined strut 18. The triangular truss 21 is of a symmetrical structure, and the single-side triangular truss 21 comprises a first chord 22, a first vertical rod 23-1, a second vertical rod 23-2 and a second web member 24, wherein the bottom ends of the first chord 22, the first vertical rod 23-1 and the second vertical rod 23-2 are fixed on the upper chord 13, and the second web member is used for connecting the bottom end of the first vertical rod 23-1 and the middle part of the first chord 22. The top ends of the second vertical bars 23-2 are fixed in the middle of the first chord 22, the top ends of the first vertical bars 23-1 on both sides are connected through a connecting rod 26, the side surface of the connecting rod 26 is connected with the top ends of the first chord 22 on both sides, and the middle parts of the first chord 22 on both sides are connected through a second cross rod 25. The middle position of the connecting rod 26 is provided with an ear plate 27 for connecting the fixed pulley 9-2. The traction rope 9-3 is pulled through the winch 8 fixed on the stiffening beam 5 to enable the movable pulley 9-1 connected with the main cable 3 to move towards the triangular truss 21 provided with the fixed pulley 9-2, so that the main cable 3 is expanded to achieve the purpose of linear conversion of the main cable.
As shown in fig. 13 to 18, the reaction frame is divided into a middle reaction frame 31 and side span reaction frames 41, the middle reaction frame 31 is disposed between the bridge towers 6, the side span reaction frames 41 are disposed on the side spans at both ends of the bridge body, and both the middle reaction frame 31 and the side span reaction frames 41 adopt steel pipe structures. The middle reaction frame 31 comprises a pair of first vertical braces 32 arranged in parallel and a pair of second inclined braces 33 arranged in parallel, the first vertical braces 32 are vertically fixed on the stiffening beam 5, the top of each first vertical brace 32 is connected with one end of each second inclined brace 33, and the other end of each second inclined brace 33 is fixed on the stiffening beam 5; first lower parallel connection 35 is arranged between the first vertical support 32 and the second inclined support 33 and between the second inclined supports 33, and the first vertical supports 32 are connected through first upper parallel connection 34. The first upper parallel connection 34 and the first lower parallel connection 35 are both horizontally arranged, and the first upper parallel connection 34 is connected with the fixed pulley 9-2, and the relative distance between the first upper parallel connection and the fixed pulley 9-2 is kept unchanged.
The side span reaction frame 41 comprises a pair of second vertical braces 42 which are arranged in parallel and a pair of splayed third inclined braces 43, the second vertical braces 42 are vertically fixed on the stiffening beam 5, the top of each second vertical brace 42 is connected with one end of each third inclined brace 43, and the other end of each third inclined brace 43 is fixed on the stiffening beam 5; a second lower parallel connection 46 and a middle parallel connection 45 are arranged between the second vertical support 42 and the third inclined support 43 and between the third inclined supports 43, and the second vertical supports 42 are connected through a second upper parallel connection 44. The second upper parallel connection 44, the middle parallel connection 45 and the second lower parallel connection 46 are all horizontally arranged, and the first upper parallel connection 34 is connected with the fixed pulley 9-2, and the relative distance between the two is kept unchanged.
The embodiment provides a system conversion device and a conversion construction method of a space cable surface self-anchored suspension bridge, the space self-anchored suspension bridge adopts the space self-anchored suspension bridge shown in fig. 1 and fig. 2, a main bridge main span is 300m, a main cable 3 rise ratio is 1/4, the distance between main cables 3 in a hollow cable shape is 2.446m, the transverse bridge direction distance between the main cables 3 at the theoretical intersection point of a main cable saddle in a bridge line shape is 0.5m, and the transverse distance between the main cables at the middle part of the mid-span is 41.49 m. The method comprises the following steps.
Firstly, completing construction of a bridge tower 6 and a stiffening girder 5, then erecting a catwalk 7, erecting a main cable 3 on the catwalk 7 to form a hollow cable shape, and after cable tightening work of the main cable 3 is completed, hoisting the catwalk 7 to the main cable 3 by using a hoisting rope;
step two, arranging two groups of cross braces 1 and a group of middle reaction frames 31 in the midspan, and respectively arranging a group of side-span reaction frames 41 on the side spans at two sides;
thirdly, arranging a winch 8 and a pulley block 9 on the cross brace 1 and a stiffening beam 5 for placing the reaction frame, and dragging and spreading the main cable 3 from an empty cable position to a bridge forming position by using the winch 8;
step four, mounting the suspension ropes 4 in batches and stretching the suspension ropes to the proper positions, finishing the system conversion, and dismantling the cross brace 1 and the reaction frames 31 and 41;
and fifthly, performing anticorrosion construction on the main cable 3, dismantling the catwalk 7, and performing construction on auxiliary facilities of the bridge deck until bridge construction is completed.
In the first step, the catwalk 7 is designed in a separated mode and is divided into a left catwalk and a right catwalk, the distance between the main cables 3 is close under the condition that the hollow cables are linear, and the catwalks 7 of the midspan are integrally formed by connecting pieces.
In the second step, the two groups of wales 1 are respectively located at the positions of the mid-span 1/4 and 3/4, and the mid-span reaction frame 31 is arranged at the position of the mid-span 1/2. The two side span reaction frame 41 is located at each side span 1/4. The connecting position of the cross brace 1 and the main cable 3 adopts a steel wire rope to be directly wound on the main cable 3, and a hemp bag or a rubber layer can be wound on the main cable 3 in order to prevent the coating of the main cable 3 from being damaged. The reaction frames 31 and 41 are connected with the stiffening beam 5 by welding.
In the third step, the winch 8 is positioned on the rectangular truss 11 on the cross brace 1; on the reaction frames 31 and 41, the hoist 8 is located on the stiffening beam 5. Before catwalk 7 struts along with main push-towing rope 3, need to relieve connecting piece and the anti-wind cable between the catwalk 7 of midspan to change catwalk 7 handrail rope to the bearing rope position. And (3) simultaneously carrying out main cable 3 forming operation by using the middle reaction frame 31 and the cross braces 1, and after the cross braces 1 are pulled in place, continuing the operation of the middle reaction frame 31 until the main cable 3 reaches the bridge line shape.
In the fourth step, the sling 4 can generate displacement in the longitudinal direction and the transverse direction in the tensioning process, so that the positions of the cross brace 1 and the reaction frame 2 can be properly adjusted to facilitate the installation of the sling 4, and the main cable 3 can better adapt to the installation of the cable clamp angle and the sling 4.
It should be noted that the above description is only used for illustrating some principles of the system conversion device and the conversion construction method of the spatial cable surface self-anchoring suspension bridge of the present invention, and since it is obvious for a person skilled in the same technical field to make several modifications and changes on the basis of the above description. Therefore, the present disclosure is not intended to limit the invention to the exact construction and operation shown and described, and all such modifications, equivalents, improvements, and equivalents may be resorted to, falling within the scope of the invention.
Claims (10)
1. The utility model provides a space cable surface is from system conversion equipment of anchor suspension bridge which characterized in that: the bridge comprises a cross brace and a middle reaction frame which are arranged in the middle of a bridge body, and side-span reaction frames which are arranged at two ends of the bridge body, wherein the cross brace is arranged on a main cable, and the reaction frames are arranged on stiffening beams of a bridge; the transverse support and the stiffening beam provided with the reaction frame are both provided with a pulley block and a winch for controlling the pulley block, and a main cable arranged in the catwalk is connected with a movable pulley of the pulley block.
2. The system conversion device of the spatial cable plane self-anchoring suspension bridge according to claim 1, characterized in that: the transverse support mainly comprises a plurality of rectangular trusses which are connected with each other and triangular trusses which are arranged at the tops of two ends of each rectangular truss group; the fixed pulley of the pulley block is arranged on the triangular truss, the traction rope of the pulley block is connected with the winch, and the winch is arranged on the upper portion of the rectangular truss.
3. The architecture conversion device of the spatial cable plane self-anchoring suspension bridge according to claim 2, characterized in that: the rectangular truss comprises two parallel trusses, each parallel truss comprises an upper chord, a lower chord, a first vertical rod and a first web member, the upper chord and the lower chord are parallel to each other, the first vertical rod and the first web member are arranged between the upper chord and the lower chord, and the two parallel trusses are connected into a whole through a first cross rod and a first inclined strut.
4. The architecture conversion device of the spatial cable plane self-anchoring suspension bridge according to claim 2 or 3, characterized in that: the triangular truss adopts symmetrical structure, unilateral triangular truss includes the first chord member of bottom mounting at the last chord member, first montant and second montant and is used for connecting the second web member in first montant bottom and first chord member middle part, the middle part at first chord member is fixed on the top of second montant, the top of the first montant of both sides links to each other through the connecting rod, and the connecting rod side links to each other with the top of the first chord member of both sides, the middle part of the first chord member of both sides links to each other through the second horizontal pole, the connecting rod intermediate position is equipped with the otic placode that is used for connecting the fixed pulley of assembly pulley.
5. The architecture conversion device of the spatial cable plane self-anchoring suspension bridge according to claim 1 or 2, characterized in that: the middle reaction frame comprises a pair of first vertical supports arranged in parallel and a pair of second inclined supports arranged in parallel, the first vertical supports are vertically fixed on the stiffening beam, the top of each first vertical support is connected with one end of each second inclined support, and the other end of each second inclined support is fixed on the stiffening beam; a first lower parallel connection is arranged between the first vertical support and the second inclined support and between the second inclined supports, and the upper parts of the first vertical supports are connected through a first upper parallel connection; the fixed pulley of the pulley block is connected with the first upper parallel connection.
6. The architecture conversion device of the spatial cable plane self-anchoring suspension bridge according to claim 1 or 2, characterized in that: the side span reaction frame comprises a pair of second vertical braces which are arranged in parallel and a pair of splayed and opened third inclined braces, the second vertical braces are vertically fixed on the stiffening beam, the top of each second vertical brace is connected with one end of each third inclined brace, and the other end of each third inclined brace is fixed on the stiffening beam; a second lower parallel connection and a second upper parallel connection are arranged between the second vertical support and the third inclined support and between the third inclined supports, and the upper parts of the second vertical supports are connected through the second upper parallel connection; the fixed pulley of the pulley block is connected with the second upper parallel connection.
7. A system conversion construction method of a space cable surface self-anchoring suspension bridge is characterized by comprising the following steps:
firstly, constructing a bridge tower and a stiffening beam, then erecting a catwalk, erecting a main cable on the catwalk to form a hollow cable shape, and hoisting the catwalk to the main cable by using a hoisting rope after the main cable is tightened;
step two, arranging two groups of cross braces and a group of middle reaction frames on the midspan, wherein the cross braces are arranged on the main cable, and the two side spans are respectively provided with a group of side span reaction frames;
thirdly, arranging a winch and a pulley block on the transverse brace and a stiffening beam for placing the reaction frame, and dragging and spreading the main cable from the hollow cable shape position to a bridge forming position by utilizing a winch traction pulley;
step four, installing the slings in batches and tensioning the slings in place, and dismantling the cross braces and the reaction frames after completing system conversion;
and fifthly, performing main cable anticorrosion construction, dismantling catwalks, and performing bridge deck auxiliary facility construction until bridge construction is completed.
8. The system conversion construction method of the spatial cable surface self-anchoring suspension bridge according to claim 7, characterized in that: in the first step, the catwalk is divided into a left catwalk and a right catwalk, and the left catwalk and the right catwalk at the midspan are integrated by adopting connecting pieces in a hollow cable shape state; in the third step, before the main cable is spread, the connecting piece and the wind-resistant cable between the middle-span catwalks need to be removed, and the handrail ropes of the catwalks are changed to the positions of the bearing ropes.
9. The system conversion construction method of the spatial cable surface self-anchoring suspension bridge according to claim 7, characterized in that: in the second step, one group of middle reaction frames are located at the position of the mid-span 1/2, two groups of cross braces are located at the positions of the mid-span 1/4 and 3/4 respectively, and two groups of side-span reaction frames are located at the position of the side-span 1/4.
10. The system conversion construction method of the space cable surface self-anchoring suspension bridge according to claim 7, characterized in that: in the fourth step, in order to facilitate the installation of the sling, the positions of the adjacent cross brace and the reaction frame are properly adjusted, so that the main cable is suitable for the installation of the sling and the angle of the cable clamp.
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| EP0617171B1 (en) * | 1993-03-26 | 1996-11-20 | P.G. Brown Ltd. | Method for erecting a suspension bridge and device therefor |
| CN101418542B (en) * | 2008-11-21 | 2013-12-25 | 上海市政工程设计研究总院 | Cable system construction method of spatial self-anchored rope-suspension bridge |
| CN102021887A (en) * | 2010-09-16 | 2011-04-20 | 长沙理工大学 | Suspender tensioning method of double-tower single-span self-anchored suspension bridge with high-cross dip and spatial cable |
| CN104060540B (en) * | 2014-06-03 | 2015-12-02 | 长安大学 | A kind of cable of space cable suspension bridge false stull and construction method for hanging thereof |
| CN106758859B (en) * | 2017-03-13 | 2019-06-25 | 中交四公局第六工程有限公司 | A kind of suspension bridge cat road head-rope changes shifting and conjugates fixed device and method |
| CN110468724B (en) * | 2019-08-30 | 2020-12-01 | 西安市政设计研究院有限公司 | Auxiliary device for main cable construction of space cable suspension bridge and main cable construction method |
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2021
- 2021-04-09 CN CN202110382157.5A patent/CN113152290B/en active Active
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