CN111979916B - Cable-stayed bridge tower part suspension construction method and suspension operation platform device - Google Patents
Cable-stayed bridge tower part suspension construction method and suspension operation platform device Download PDFInfo
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- CN111979916B CN111979916B CN201911415046.9A CN201911415046A CN111979916B CN 111979916 B CN111979916 B CN 111979916B CN 201911415046 A CN201911415046 A CN 201911415046A CN 111979916 B CN111979916 B CN 111979916B
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- cross beam
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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
Abstract
The invention provides a construction method for hanging a cable at the tower part of a cable-stayed bridge, which designs a process for hanging the cable by using a suspended operating platform device with a shoulder pole beam structure. The invention also provides a suspension operation platform device for the construction of the suspension cable at the tower part of the cable-stayed bridge based on the method, a shoulder pole beam structure formed by two cross beams is used as a main bearing part, operation platforms are arranged at two sides of the tower body of the main tower, and the operation platforms are positioned below each cable hole, so that a stable operation space is provided for operators, the operation requirement of the suspension cable of the large-span cable-stayed bridge can be met, the assembly and the disassembly are convenient, the safety is high, the operation efficiency is improved, and the safety risk is reduced.
Description
Technical Field
The invention relates to a cable-stayed bridge tower part suspension construction method and a suspension operation platform device, belonging to the technical field of bridge construction.
Background
With the continuous development of high-speed railway construction technology, cable-stayed bridges become one of the main forms of large-span bridges. The installation of the stay cable is one of the key processes of the construction of the cable-stayed bridge, and the installation of the stay cable is mostly carried out by adopting a mode of erecting a scaffold or hanging a hanging basket at present. The method for setting up the scaffold has the defects of long installation time, large workload, difficult operation of construction and extremely high safety risk because a higher scaffold needs to be set up during the construction of a high tower; the hanging basket construction method has high lifting risk due to hanging and hoisting operation, inconvenient operation in high-altitude operation and low work efficiency, and is not suitable for long-time operation due to low stability.
The stay cable is penetrated through the cable and belongs to high-altitude operation, the risk is high, the main tower is increased along with the increase of the span of the bridge, the required steel cable is longer, the weight is larger, when the winch is not enough to provide power required by the cable hanging, a jack needs to be installed at the cable hole to be used as power to complete the cable hanging operation, the operation method needs to manually operate the jack, the operation time is longer, and the existing construction steps and auxiliary devices are difficult to meet the requirement of high-altitude cable hanging construction.
Disclosure of Invention
In order to solve the problems of higher safety risk and low work efficiency of a stay cable reeving construction process in the prior art, the invention provides a stay cable construction method for a tower part of a cable-stayed bridge and a suspension operation platform device.
The technical scheme adopted by the invention for solving the technical problem is as follows: the cable-stayed bridge tower part suspension cable construction method comprises the following steps:
(1) mounting an embedded steel plate at the top of a tower body of a main tower of the cable-stayed bridge;
(2) respectively hoisting a first cross beam and a second cross beam to the top of the embedded plate, welding the bottoms of the first cross beam and the second cross beam with the top of the embedded plate, and enabling the first cross beam and the second cross beam to be parallel to each other to form a double-carrying-pole beam structure;
(3) hoisting a clamping sleeve with a bottom connected with a vertical rod to the top of a main tower of the cable-stayed bridge through a hanging ring at the top of the clamping sleeve, respectively sleeving the clamping sleeve on the end parts of a first cross beam and a second cross beam, and welding and reinforcing the clamping sleeve, wherein an operating platform and a crawling ladder are pre-installed on the vertical rod, and the operating platform is positioned between the vertical rod and the main tower of the cable-stayed bridge;
(4) erecting an introduction ladder stand between a middle cross beam of a main tower of the cable-stayed bridge and a bottommost operating platform;
(5) an operator climbs along the lead-in ladder to an operation platform below the cable hole to be subjected to hanging operation;
(6) carrying out preparation work before cable hanging;
(7) after the preparation work is finished, a stay cable is installed at one end of the stay cable, one end of the stay cable where the stay cable is installed is hoisted to a cable hole by using a tower crane, an operator stands on an operation platform, penetrates the stay cable through the cable hole, uses a winch as power to pull the stay cable through the cable hole, finishes the cable hanging operation of one cable hole, then climbs to the operation platform below other cable holes to be subjected to the cable hanging operation along a ladder stand, and repeats the steps until the cable hanging operation of all the cable holes is finished.
Before hoisting the cutting ferrule to the top of the main tower of the cable-stayed bridge in the step (3), a safety plate is laid between the end parts of the first cross beam and the second cross beam, which are positioned at the same side of the tower body of the main tower of the cable-stayed bridge, and comprises a bottom plate and a first wing plate and a second wing plate above the bottom plate, the first wing plate and the second wing plate are respectively connected to the two sides of the bottom plate through a vertical plate, the first wing plate and the second wing plate are respectively welded on the upper surfaces of the first cross beam and the second cross beam, and a safety platform for welding the cutting ferrule is formed.
The operation platform in the step (3) is installed on the vertical rod through the following processes: the vertical rods positioned on the same side of the main tower body of the cable-stayed bridge are respectively a first vertical rod and a second vertical rod, the first cantilever is vertically welded on the first vertical rod, one end of the first inclined strut is welded on the first vertical rod, the other end of the first inclined strut is welded on the lower surface of the cantilever end of the first cantilever, and the first cantilever and the first inclined strut form a bracket; vertically welding a second cantilever on a second vertical rod, welding one end of a second inclined strut on the second vertical rod, and welding the other end of the second inclined strut on the lower surface of the end of the second cantilever, so that the second cantilever and the second inclined strut form a bracket; the two bottom plate frame plates are respectively welded at the anchoring end and the cantilever end of the first cantilever and the second cantilever, so that the first cantilever and the second cantilever respectively support the two ends of the bottom plate frame plates, the bottom plate cross braces are arranged between the bottom plate frame plates at equal intervals, the two ends of the bottom plate cross braces are welded on the bottom plate frame plates, and the platform bottom plate is laid on the bottom plate cross braces.
The ladder stand in the step (3) is arranged on the vertical rod through the following processes: welding a row of ladder stands on two sides of each tower body of the main tower of the cable-stayed bridge, welding and fixing one end of each ladder stand with a first vertical rod, and welding and fixing the other end of each ladder stand with a first cantilever of an operation platform; or one end of the ladder stand is welded and fixed with the second vertical rod, and the other end of the ladder stand is welded and fixed with the second cantilever of the operating platform.
Hooks in the same direction as the operation platform are distributed on the vertical rods, when preparation work before cable hanging is carried out, a protective rod is hung between the current operation platform and the previous operation platform from bottom to top, and through holes in the same shape as the hooks are respectively arranged at two ends of the protective rod; after the preparation work before the cable hanging is finished, part of the protective rods are dismantled from top to bottom according to the working position of the stay cable, and a working space is reserved for cable hanging operation.
The beam body of first crossbeam and second crossbeam is equipped with first hanging hole, and the body of rod of montant is equipped with the second hanging hole, and operating personnel is connected safety rope and first hanging hole or second hanging hole when carrying out the construction of hanging the cable.
The invention also provides a suspension operation platform device for the construction of the hanging cable at the tower part of the cable-stayed bridge based on the construction method, which comprises a first cross beam and a second cross beam which are parallel to each other and welded with an embedded steel plate embedded at the top of a main tower body of the cable-stayed bridge, wherein the two ends of the first cross beam and the second cross beam are respectively sleeved with a cutting sleeve, the top of each cutting sleeve is welded with a hanging ring, the bottom of each cutting sleeve is respectively welded with a vertical rod, an operation platform is distributed between the two vertical rods positioned at the same side of the main tower body of the cable-stayed bridge from top to bottom, the operation platform is positioned between the vertical rods and the main tower body of the cable-stayed bridge, the two vertical rods positioned at the same side of the main tower body of the cable-stayed bridge are respectively a first vertical rod and a second vertical rod, the operation platform comprises a first cantilever vertically welded to the first vertical rod, a second cantilever welded to the second vertical rod, and a first diagonal brace welded between the bottom of the first cantilever and the first vertical rod, the second inclined strut is welded between the bottom of the second cantilever and the second vertical rod, two parallel bottom plate frame plates are welded between the anchoring end and the cantilever end of the first cantilever and the second cantilever, a bottom plate cross strut is arranged between the two bottom plate frame plates in parallel, a platform bottom plate is laid on the bottom plate cross strut, one end of the ladder stand is connected with the first vertical rod, and the other end of the ladder stand is connected with the first cantilever of the operation platform; or one end of the ladder stand is connected with the second vertical rod, the other end of the ladder stand is connected with the second cantilever of the operating platform, the ladder stand is distributed on at least one vertical rod of the two vertical rods from top to bottom, and the introduction ladder stand is erected between the middle cross beam of the main tower of the cable-stayed bridge and the bottommost operating platform.
Safety plates are laid between the end portions of the first cross beam and the second cross beam, which are located on the same side of the main tower body of the cable-stayed bridge, and each safety plate comprises a bottom plate and a first wing plate and a second wing plate which are arranged above the bottom plate, the first wing plates and the second wing plates are connected to the two sides of the bottom plate through vertical plates respectively, and the first wing plates and the second wing plates are connected to the upper surfaces of the first cross beam and the second cross beam respectively.
First hanging holes used for hanging safety ropes are distributed in the beam bodies of the first cross beam and the second cross beam, and second hanging holes used for hanging the safety ropes are distributed in the rod body of the vertical rod.
The rod body of the vertical rod is provided with a hook which is in the same direction as the operating platform and used for hanging the protective rod.
The invention has the beneficial effects based on the technical scheme that:
(1) the construction method for hanging the cable at the tower part of the cable-stayed bridge provided by the invention abandons the traditional construction mode of erecting a scaffold or hanging a hanging basket, designs a process for hanging the cable by utilizing the suspended operating platform device with a shoulder pole beam structure, has simple installation process, completes the installation of the suspended operating platform on a stable tower top plane, performs the hanging cable construction on a stable operating platform, has high operation space safety, is beneficial to improving the operation efficiency and reducing the safety risk;
(2) the construction method for hanging the cable at the tower part of the cable-stayed bridge can add the installation steps of the safety plate and the guard bar, further ensure the safety of operators, adjust the sizes and the distances of the safety plate and the guard rail according to the actual condition of the actual cable-stayed bridge, be applied to the construction of various cable-stayed bridges and improve the transportability and the flexibility;
(3) the construction method for the hanging cable at the tower part of the cable-stayed bridge can add the connection steps of the safety rope and the first hanging hole and the second hanging hole, thereby further improving the operation safety;
(4) the suspended operating platform device for the construction of the suspension cable at the tower part of the cable-stayed bridge, provided by the invention, takes a shoulder pole beam structure formed by two cross beams as a main bearing part, the operating platforms are arranged at two sides of the tower body of the main tower, and are positioned below each cable hole, so that a stable operating space is provided for operators, the operating requirements of the suspension cable of the large-span cable-stayed bridge can be met, the assembly and the disassembly are convenient, the safety is high, the operating efficiency is improved, and the safety risk is reduced.
Drawings
Fig. 1 is a schematic perspective view of a cable-stayed bridge tower portion suspension construction suspension operation platform device according to a third embodiment of the present invention.
FIG. 2 is a schematic structural diagram of a single-tower suspended platform in the third embodiment.
Fig. 3 is a schematic perspective view of an operation platform according to a third embodiment.
Fig. 4 is a front view of a suspension operation platform device for cable-stayed bridge tower part suspension construction according to a third embodiment of the present invention.
Fig. 5 is a left side view of a cable-stayed bridge tower portion suspension construction suspension operation platform device according to a third embodiment of the present invention.
Fig. 6 is a top view of a cable-stayed bridge tower portion suspension construction suspension operation platform device according to a third embodiment of the present invention.
Fig. 7 is a schematic view of the distribution of the security plates in the fourth embodiment of the present invention.
Fig. 8 is a schematic perspective view of an operation platform according to a fourth embodiment of the present invention.
In the figure: 1-first beam, 2-second beam, 3-embedded steel plate, 4-first vertical rod, 5-second vertical rod, 6-third vertical rod, 7-fourth vertical rod, 8-operation platform, 81-first overhang, 82-first diagonal brace, 83-second overhang, 84-second diagonal brace, 85-bottom plate frame plate, 86-bottom plate cross brace, 87-platform bottom plate, 88-second hanging hole, 89-hook, 810-protective rod, 9-first ladder stand, 10-second ladder stand, 11-cutting sleeve, 12-hanging ring, 13-leading ladder stand, 14-cable-stayed bridge main tower body, 15-middle beam, 16-cable hole, 17-cable-stayed cable, 18-safety plate and 19-first hanging hole.
Detailed Description
The invention is further illustrated by the following figures and examples.
The first embodiment is as follows:
the embodiment provides a cable-stayed bridge tower part suspension construction method, which comprises the following steps:
(1) mounting an embedded steel plate at the top of a tower body of a main tower of the cable-stayed bridge;
(2) respectively hoisting a first cross beam and a second cross beam to the top of the embedded plate, welding the bottoms of the first cross beam and the second cross beam with the top of the embedded plate, and enabling the first cross beam and the second cross beam to be parallel to each other to form a double-carrying-pole beam structure;
(3) hoisting a clamping sleeve with a bottom connected with a vertical rod to the top of a main tower of the cable-stayed bridge through a hanging ring at the top of the clamping sleeve, respectively sleeving the clamping sleeve on the end parts of a first cross beam and a second cross beam, and welding and reinforcing the clamping sleeve, wherein an operating platform and a crawling ladder are pre-installed on the vertical rod, and the operating platform is positioned between the vertical rod and the main tower of the cable-stayed bridge;
(4) erecting an introduction ladder stand between a middle cross beam of a main tower of the cable-stayed bridge and a bottommost operating platform;
(5) an operator climbs along the lead-in ladder to an operation platform below the cable hole to be subjected to hanging operation;
(6) preparing before hanging the cable, wherein the preparation comprises procedures of HDPE sleeve welding, anchorage installation, HDPE sleeve installation and the like;
(7) after the preparation work is finished, a stay cable is installed at one end of the stay cable, one end of the stay cable where the stay cable is installed is hoisted to a cable hole by using a tower crane, an operator stands on an operation platform, penetrates the stay cable through the cable hole, uses a winch as power to pull the stay cable through the cable hole, finishes the cable hanging operation of one cable hole, then climbs to the operation platform below other cable holes to be subjected to the cable hanging operation along a ladder stand, and repeats the steps until the cable hanging operation of all the cable holes is finished.
The operation platform in the step (3) is installed on the vertical rod through the following processes: the vertical rods positioned on the same side of the main tower body of the cable-stayed bridge are respectively a first vertical rod and a second vertical rod, the first cantilever is vertically welded on the first vertical rod, one end of the first inclined strut is welded on the first vertical rod, the other end of the first inclined strut is welded on the lower surface of the cantilever end of the first cantilever, and the first cantilever and the first inclined strut form a bracket; vertically welding a second cantilever on a second vertical rod, welding one end of a second inclined strut on the second vertical rod, and welding the other end of the second inclined strut on the lower surface of the end of the second cantilever, so that the second cantilever and the second inclined strut form a bracket; the two bottom plate frame plates are respectively welded at the anchoring end and the cantilever end of the first cantilever and the second cantilever, so that the first cantilever and the second cantilever respectively support the two ends of the bottom plate frame plates, the bottom plate cross braces are arranged between the bottom plate frame plates at equal intervals, the two ends of the bottom plate cross braces are welded on the bottom plate frame plates, and the platform bottom plate is laid on the bottom plate cross braces.
The ladder stand in the step (3) is arranged on the vertical rod through the following processes: welding a row of ladder stands on two sides of each tower body of the main tower of the cable-stayed bridge, welding and fixing one end of each ladder stand with a first vertical rod, and welding and fixing the other end of each ladder stand with a first cantilever of an operation platform; or one end of the ladder stand is welded and fixed with the second vertical rod, and the other end of the ladder stand is welded and fixed with the second cantilever of the operating platform.
Example two:
the difference between the embodiment and the first embodiment is that, before hoisting the cutting ferrule to the top of the main tower of the cable-stayed bridge in step (3), a safety plate is laid between the ends of the main tower body of the cable-stayed bridge on the same side of the main tower body of the cable-stayed bridge on the first cross beam and the second cross beam in advance, the safety plate comprises a bottom plate and a first wing plate and a second wing plate above the bottom plate, the first wing plate and the second wing plate are respectively connected to two sides of the bottom plate through a vertical plate, the first wing plate and the second wing plate are respectively welded on the upper surfaces of the first cross beam and the second cross beam, and a safety platform for welding the cutting ferrule is formed. The laying length and the spacing of the safety plate can be adjusted according to the actual condition of the actual cable-stayed bridge, and the welding position of the clamping sleeve is reserved at the end part of the cross beam.
The vertical rod can be distributed with hooks in the same direction as the operation platform, when the preparation work before cable hanging is carried out in the step (6), a protective rod is hung between the current operation platform and the previous stage operation platform from bottom to top, and through holes with the same shape as the hooks are respectively arranged at two ends of the protective rod; after the preparation work before the cable hanging is finished, part of the protective rods are dismantled from top to bottom according to the working position of the stay cable, and a working space is reserved for cable hanging operation.
The beam body of first crossbeam and second crossbeam can set up first hanging hole, and the body of rod of montant is equipped with the second hanging hole, and operating personnel is connected safety rope and first hanging hole or second hanging hole when carrying out the construction of hanging the cable.
Example three:
the embodiment provides a cable-stayed bridge tower part suspension construction operation platform device based on a construction method, and with reference to fig. 1 to 6, the cable-stayed bridge tower part suspension construction operation platform device comprises a first cross beam 1 and a second cross beam 2 which are parallel to each other and welded with an embedded steel plate 3 embedded at the top of a main tower body 14 of a cable-stayed bridge, wherein the end parts of two sides of the first cross beam 1 and the second cross beam 2 are respectively sleeved with a clamping sleeve 11, the clamping sleeves are rectangular, and the inner size of the clamping sleeve is slightly larger than the cross section of the cross beam.
The top welding of each cutting ferrule 11 has rings 12, and the bottom welding of each cutting ferrule 11 has the montant respectively, and it has operation platform 8 to distribute from top to bottom between two montants that are located cable-stay bridge king-tower shaft homonymy, and each operation platform 8 is located about 90cm department below 16 cable holes.
One end of the ladder stand is connected with the first vertical rod 4, and the other end of the ladder stand is connected with the first cantilever 81 of the operating platform 8; or one end of the ladder stand is connected with the second vertical rod 5, and the other end is connected with the second cantilever 83 of the operating platform 8, and the ladder stand is a first ladder stand 9.
The operating platform on the opposite side is arranged on the third vertical rod 6 and the fourth vertical rod 7, the relative position of the operating platform on the opposite side and the cable hole is completely the same as that of the operating platform in structure and installation mode, and the second ladder stand 10 on the opposite side is arranged on the third vertical rod 6 or the fourth vertical rod 7.
An introduction ladder stand 13 is erected between a middle cross beam 15 of the main tower of the cable-stayed bridge and the bottommost operating platform.
Wherein each crossbeam can adopt the preparation of 40# I-steel, the cutting ferrule can adopt the preparation of 50X 50mm, hollow square pipe of wall thickness 10mm, rings adopt the plain noodles round steel preparation that the diameter is 20mm, the bottom plate stull adopts the preparation of the ribbed steel bar that the diameter is 20mm, each montant adopts the preparation of 20# I-steel, each is encorbelmented, the bracing adopts the preparation of 16# I-steel, each cat ladder, introduce the hollow steel pipe preparation that the cat ladder adopted the external diameter to be 48mm, the wall thickness is 3.5mm, the bottom plate frame can adopt the preparation of angle steel of 50X 5mm, the platform bottom plate can adopt the plank of thickness 30 mm.
The welding between the components is full welding.
Example four:
referring to fig. 7 and 8, the difference between the present embodiment and the third embodiment is that a safety plate 18 is laid between the ends of the first beam 1 and the second beam 2 located on the same side of the main tower body of the cable-stayed bridge, the safety plate 18 includes a bottom plate and a first wing plate and a second wing plate above the bottom plate, the first wing plate and the second wing plate are respectively connected to two sides of the bottom plate through risers, and the first wing plate and the second wing plate are respectively connected to the upper surfaces of the first beam 1 and the second beam 2. The first wing plate and the second wing plate can be connected with the first cross beam 1 and the second cross beam 2 through full welding, and can also be fixedly connected through bolt and screw hole combination.
First hanging holes 19 used for hanging safety ropes are distributed on the beam bodies of the first cross beam 1 and the second cross beam 2, and second hanging holes 88 used for hanging safety ropes are distributed on the rod body of the vertical rod.
It establishes couple 89 of protective rod 810 to distribute on the body of rod of montant with 8 syntropies of operation platform being used for hanging, protective rod 810 is detachable construction, use along with the process turnover, adjust to the operation platform that needs the operation of hanging the cable, the quantity of protective rod 810 can be adjusted according to the process, it is full to hang the rail guard in current work platform space when carrying out the preparation work of hanging the cable, after the installation of isocline cable PE outer tube, according to stay cable 17's angle installation protective rod, compromise security and flexibility, and improve work efficiency.
According to the cable-stayed bridge tower part suspension construction method and the suspension operation platform device, the operation platform is arranged at the lower part of the main tower body cable hole through the shoulder pole beam structure, so that an operation space is provided for operators, the operation efficiency is improved, the safety risk is reduced, and the cable-stayed bridge suspension operation requirement of a large-span cable-stayed bridge can be met.
Claims (9)
1. A construction method for hanging cables at a tower part of a cable-stayed bridge is characterized by comprising the following steps:
(1) mounting an embedded steel plate at the top of a tower body of a main tower of the cable-stayed bridge;
(2) respectively hoisting a first cross beam and a second cross beam to the top of the embedded plate, welding the bottoms of the first cross beam and the second cross beam with the top of the embedded plate, and enabling the first cross beam and the second cross beam to be parallel to each other to form a double-carrying-pole beam structure;
(3) hoisting a clamping sleeve with a bottom connected with a vertical rod to the top of a main tower of the cable-stayed bridge through a hanging ring at the top of the clamping sleeve, respectively sleeving the clamping sleeve on the end parts of a first cross beam and a second cross beam, and welding and reinforcing the clamping sleeve, wherein an operating platform and a crawling ladder are pre-installed on the vertical rod, and the operating platform is positioned between the vertical rod and the main tower of the cable-stayed bridge; the operation platform is installed on the vertical rod through the following processes: the vertical rods positioned on the same side of the main tower body of the cable-stayed bridge are respectively a first vertical rod and a second vertical rod, the first cantilever is vertically welded on the first vertical rod, one end of the first inclined strut is welded on the first vertical rod, the other end of the first inclined strut is welded on the lower surface of the cantilever end of the first cantilever, and the first cantilever and the first inclined strut form a bracket; vertically welding a second cantilever on a second vertical rod, welding one end of a second inclined strut on the second vertical rod, and welding the other end of the second inclined strut on the lower surface of the end of the second cantilever, so that the second cantilever and the second inclined strut form a bracket; welding two bottom plate frame plates on an anchoring end and a cantilever end of a first cantilever and a second cantilever respectively, enabling the first cantilever and the second cantilever to support two ends of the bottom plate frame plates respectively, arranging bottom plate crossbars at equal intervals between the bottom plate frame plates, welding two ends of the bottom plate crossbars on the bottom plate frame plates, and laying a platform bottom plate on the bottom plate crossbars;
(4) erecting an introduction ladder stand between a middle cross beam of a main tower of the cable-stayed bridge and a bottommost operating platform;
(5) an operator climbs along the lead-in ladder to an operation platform below the cable hole to be subjected to hanging operation;
(6) carrying out preparation work before cable hanging;
(7) after the preparation work is finished, a stay cable is installed at one end of the stay cable, one end of the stay cable where the stay cable is installed is hoisted to a cable hole by using a tower crane, an operator stands on an operation platform, penetrates the stay cable through the cable hole, uses a winch as power to pull the stay cable through the cable hole, finishes the cable hanging operation of one cable hole, then climbs to the operation platform below other cable holes to be subjected to the cable hanging operation along a ladder stand, and repeats the steps until the cable hanging operation of all the cable holes is finished.
2. The cable-stayed bridge tower part suspension cable construction method according to claim 1, characterized in that: before hoisting the cutting ferrule to the top of the main tower of the cable-stayed bridge in the step (3), a safety plate is laid between the ends of the first cross beam and the second cross beam which are positioned at the same side of the tower body of the main tower of the cable-stayed bridge in advance, the safety plate (18) comprises a bottom plate and a first wing plate and a second wing plate which are arranged above the bottom plate, the first wing plate and the second wing plate are respectively connected to the two sides of the bottom plate through a vertical plate, the first wing plate and the second wing plate are respectively welded to the upper surfaces of the first cross beam and the second cross beam, and a safety platform for welding the cutting ferrule is formed.
3. The cable-stayed bridge tower part suspension cable construction method according to claim 1, characterized in that: the ladder stand in the step (3) is arranged on the vertical rod through the following processes: welding a row of ladder stands on two sides of each tower body of the main tower of the cable-stayed bridge, welding and fixing one end of each ladder stand with a first vertical rod, and welding and fixing the other end of each ladder stand with a first cantilever of an operation platform; or one end of the ladder stand is welded and fixed with the second vertical rod, and the other end of the ladder stand is welded and fixed with the second cantilever of the operating platform.
4. The cable-stayed bridge tower part suspension cable construction method according to claim 1, characterized in that: hooks in the same direction as the operation platform are distributed on the vertical rods, when the preparation work before cable hanging is carried out in the step (6), a protective rod is hung between the current operation platform and the previous stage operation platform from bottom to top, and through holes in the shape of the hooks are respectively formed in two ends of the protective rod; after the preparation work before the cable hanging is finished, part of the protective rods are dismantled from top to bottom according to the working position of the stay cable, and a working space is reserved for cable hanging operation.
5. The cable-stayed bridge tower part suspension cable construction method according to claim 1, characterized in that: the beam body of first crossbeam and second crossbeam is equipped with first hanging hole, and the body of rod of montant is equipped with the second hanging hole, and operating personnel is connected safety rope and first hanging hole or second hanging hole when carrying out the construction of hanging the cable.
6. A suspension operation platform device for cable-stayed bridge tower part suspension construction based on the construction method of claim 1 is characterized in that: comprises a first cross beam (1) and a second cross beam (2) which are parallel to each other and welded with an embedded steel plate (3) embedded at the top of a main tower body (14) of a cable-stayed bridge, two side ends of the first cross beam (1) and the second cross beam (2) are respectively sleeved with a cutting sleeve (11), a hanging ring (12) is welded at the top of each cutting sleeve (11), the bottom of each cutting sleeve (11) is respectively welded with a vertical rod, an operating platform (8) is distributed between the two vertical rods positioned at the same side of the main tower body of the cable-stayed bridge from top to bottom, the operating platform (8) is positioned between the vertical rods and the main tower body of the cable-stayed bridge, the two vertical rods positioned at the same side of the main tower body of the cable-stayed bridge are respectively a first vertical rod (4) and a second vertical rod (5), the operating platform (8) comprises a first inclined strut (82) which is vertically welded to the first vertical rod (81), welded to the second cantilever (5), and a first inclined strut (82) welded between the bottom of the first cantilever (81) and the first vertical rod (4), the second inclined strut (84) is welded between the bottom of the second cantilever (83) and the second vertical rod (5), two parallel bottom plate side frame plates (85) are welded between the anchoring end and the cantilever end of the first cantilever (81) and the second cantilever (83), a bottom plate cross strut (86) is arranged between the two bottom plate side frame plates (85) in parallel, a platform bottom plate (87) is laid on the bottom plate cross strut (86), one end of the ladder stand is connected with the first vertical rod (4), and the other end of the ladder stand is connected with the first cantilever (81) of the operating platform (8); or one end of the ladder stand is connected with the second vertical rod (5), the other end of the ladder stand is connected with the second cantilever (83) of the operating platform (8), the ladder stand (9) is distributed on at least one vertical rod of the two vertical rods from top to bottom, and the introduction ladder stand (13) is erected between the middle cross beam (15) of the cable-stayed bridge main tower and the bottommost operating platform.
7. The cable-stayed bridge tower part suspension construction operation platform device according to claim 6, characterized in that: safety plates (18) are laid between the end portions of the first cross beam (1) and the second cross beam (2) located on the same side of the main tower body of the cable-stayed bridge, each safety plate (18) comprises a bottom plate and a first wing plate and a second wing plate above the bottom plate, the first wing plates and the second wing plates are connected to the two sides of the bottom plate through vertical plates respectively, and the first wing plates and the second wing plates are connected to the upper surfaces of the first cross beam (1) and the second cross beam (2) respectively.
8. The cable-stayed bridge tower part suspension construction operation platform device according to claim 6, characterized in that: first hanging holes (19) used for hanging safety ropes are distributed on the beam bodies of the first cross beam (1) and the second cross beam (2), and second hanging holes (88) used for hanging safety ropes are distributed on the rod body of the vertical rod.
9. The cable-stayed bridge tower part suspension construction operation platform device according to claim 6, characterized in that: the body of rod of montant distributes and has a couple (89) that are used for hanging establishes protective rod (810) with operation platform (8) syntropy.
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JPS6414407A (en) * | 1987-07-07 | 1989-01-18 | Kajima Corp | Method of erecting diagonal member cable in diagonal built bridge |
CN201176566Y (en) * | 2007-12-27 | 2009-01-07 | 中交第二航务工程局有限公司 | External tower type retractable construction platform at end of staying cable tower |
CN103147404B (en) * | 2013-04-02 | 2015-02-11 | 中铁大桥局集团有限公司 | System and method for hanging stay cable at tower end of height limiting cable-stayed bridge |
CN106087760A (en) * | 2016-08-09 | 2016-11-09 | 中铁大桥局集团有限公司 | A kind of jack up hanging cable stage apparatus |
CN206308627U (en) * | 2016-12-23 | 2017-07-07 | 中铁十四局集团第二工程有限公司 | A kind of portable beam body side operation frame |
CN208167540U (en) * | 2018-02-14 | 2018-11-30 | 北京城建道桥建设集团有限公司 | Cable stayed Bridge Main Tower and suspension cable synchronous construction system |
CN209619866U (en) * | 2019-02-27 | 2019-11-12 | 中铁上海工程局集团有限公司 | A kind of overhead section tensioning mud jacking job platform of track girder |
CN110004834B (en) * | 2019-04-19 | 2024-01-19 | 中交第二航务工程局有限公司 | Automatic climbing platform for hanging cable construction |
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