CN112695645B - Method for erecting stiffening beam of large-span suspension bridge - Google Patents
Method for erecting stiffening beam of large-span suspension bridge Download PDFInfo
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- CN112695645B CN112695645B CN202110013728.8A CN202110013728A CN112695645B CN 112695645 B CN112695645 B CN 112695645B CN 202110013728 A CN202110013728 A CN 202110013728A CN 112695645 B CN112695645 B CN 112695645B
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- stiffening beam
- suspension bridge
- sling
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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
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
- E01D21/10—Cantilevered erection
Abstract
The invention discloses a method for erecting a stiffening beam of a large-span suspension bridge, which relates to the technical field of suspension bridge erection and comprises the following steps: step S1, splicing stiffening beams, and drawing the stiffening beams to slide towards the closure opening of the suspension bridge; step S2, when the front end of the stiffening beam cantilever slides to the lower part of the first sling group, the first sling group is connected with the front end of the stiffening beam cantilever; step S3, continuously dragging the stiffening beam to slide towards the closure opening of the suspension bridge, and adjusting the connection point of the first sling group and the stiffening beam; step S4, when the front end of the stiffening beam cantilever slides to the lower part of the second sling group, connecting the second sling group with the front end of the stiffening beam cantilever; and step S5, alternately drawing the stiffening beam to slide and adjusting the connection point of each sling group and the stiffening beam until the front end of the stiffening beam cantilever reaches the closure opening of the suspension bridge. The invention utilizes a plurality of sling sets of the suspension bridge for construction, and a cable crane is not used in the whole construction process, thereby reducing the construction cost and having small construction safety risk.
Description
Technical Field
The invention relates to the technical field of suspension bridge erection, in particular to a method for erecting a stiffening beam of a large-span suspension bridge.
Background
With the continuous development of bridges, the construction of large-span bridges enters a new period, and a large number of large-span bridges with novel structures, complex technology, high design and construction difficulty and high technological content are successively built. Among them, the suspension bridge is becoming the preferred bridge type of large span and even super large span bridge because of its advantages of large spanning capability, good shock resistance, reasonable stress, best exertion of material strength, light weight, beautiful appearance and economical cost.
In the related art, a suspension bridge is generally a flexible suspension system composed of a main cable, a stiffening beam, a main tower, a saddle, an anchorage, a sling and other components. At present, the main erection method of the stiffening beam of the suspension bridge is as follows: the manufactured stiffening beam segments are integrally lifted and hung on the main cable by adopting hoisting equipment such as a cable crane, a large-span large-tonnage cable crane or a beam erecting crane, and all the segments are connected into a whole by bolting or welding.
However, the erection method of the cable crane is greatly influenced by the water level or the terrain of the bridge site, the stiffening beam segment near the main tower cannot be vertically lifted, and after the stiffening beam segment is lifted to a certain segment, a certain horizontal traction force needs to be provided by a traction system to pull the beam end, so that the beam end circularly moves around the cable crane until the installation is completed, and the risk of the construction process is high. Meanwhile, the cable crane is relatively high in cost and difficult to install and dismantle. For the bridge in the mountainous area, a large-tonnage large-span cable crane or a large-tonnage beam erecting crane is mainly adopted for stiffening the beam, and the construction structure and machinery cost is high, the construction efficiency is low, and the construction risk is high.
Disclosure of Invention
The embodiment of the invention provides a method for erecting a stiffening beam of a large-span suspension bridge, which aims to solve the technical problems of high construction cost and high construction risk caused by the erection method of a cable crane in the prior art.
The embodiment of the invention provides a method for erecting a stiffening beam of a large-span suspension bridge, which comprises the following steps:
splicing the stiffening beams, and drawing the stiffening beams to slide towards the closure opening of the suspension bridge;
when the front end of the cantilever of the stiffening beam slides to the lower part of the first sling group, connecting the first sling group with the front end of the cantilever of the stiffening beam;
continuously drawing the stiffening beam to slide towards the closure opening of the suspension bridge, and adjusting the connection point of the first sling group and the stiffening beam;
when the front end of the cantilever of the stiffening beam slides to the lower part of the second sling group, the second sling group is connected with the front end of the cantilever of the stiffening beam;
and alternately drawing the stiffening beam to slide and adjusting the connection point of each sling group and the stiffening beam until the front end of the suspension arm of the stiffening beam reaches the closure opening of the suspension bridge.
In some embodiments, said connecting the first set of slings to the stiffening beam boom nose as the stiffening beam boom nose slides below the first set of slings comprises the steps of:
when the front end of the cantilever of the stiffening beam slides to the lower part of the first sling group, the first sling close to the shore base side of the first sling group is connected with the front end of the cantilever of the stiffening beam, and a jack for stretching the first sling is arranged.
In some embodiments, the continuously pulling the stiffening beam to slide toward the closure of the suspension bridge and adjusting the connection point of the first sling set and the stiffening beam includes the following steps:
step A1, pulling the stiffening beam to continue to slide for the length of a section of the stiffening beam, removing the connection between the first sling and the front end of the cantilever of the stiffening beam, and connecting the second sling of the first sling group far away from the base side with the stiffening beam;
step A2, continuously drawing the stiffening beam to slide the length of the half-section stiffening beam, removing the connection between the second sling and the stiffening beam, and connecting the first sling with the stiffening beam;
and step A3, repeating the steps A1-A2 until the front end of the stiffening beam cantilever slides to the lower part of the second sling group.
In some embodiments, the splicing stiffening beam, which pulls the stiffening beam to slide toward the closure opening of the suspension bridge, includes the following steps:
constructing a main tower and an anchorage of the suspension bridge, and erecting a main cable of the suspension bridge;
installing a plurality of sling sets at preset positions of main cables of the suspension bridge;
erecting an assembling platform and a traction platform by utilizing a space between the anchorage and the main tower;
and assembling the stiffening beam on the assembling platform, installing a traction device on the traction platform, and using the traction device to pull the stiffening beam to slide towards the closure opening of the suspension bridge.
In some embodiments, the assembling the stiffening beam on the assembling platform, and installing a traction device on the traction platform, and using the traction device to pull the stiffening beam to slide towards the closure opening of the suspension bridge, includes the following steps:
step B1, assembling the stiffening beam head section on the assembling platform, and the traction device pulls the stiffening beam head section to slide towards the closure opening of the suspension bridge;
step B2, adjusting the plane and elevation of the stiffening beam head section, assembling the next stiffening beam section, and continuing the traction device to pull the stiffening beam head section to slide towards the closure opening of the suspension bridge;
and B3, repeating the steps B1-B2 until the front end of the stiffening beam cantilever slides to the position below the first sling group.
In some embodiments, the assembling a stiffening beam on the assembling platform, installing a traction device on the traction platform, and using the traction device to pull the stiffening beam to slide towards the closure opening of the suspension bridge, further includes the following steps:
arranging stiffening beam assembling plants on the assembling platform;
hoisting the sections of the stiffening beam sections to a stiffening beam assembly workshop by using a gantry crane;
and assembling the sections of the stiffening beam sections in the stiffening beam assembling factory building to form a single stiffening beam section.
In some embodiments, the assembling a stiffening beam on the assembling platform, installing a traction device on the traction platform, and using the traction device to pull the stiffening beam to slide towards the closure opening of the suspension bridge, further includes the following steps:
and after the front end of the stiffening beam is cantilevered, a weight device is arranged at the tail part of the stiffening beam.
In some embodiments, the assembling a stiffening beam on the assembling platform, installing a traction device on the traction platform, and using the traction device to pull the stiffening beam to slide towards the closure opening of the suspension bridge, further includes the following steps:
and connecting the splicing platform with the traction platform by using a platform connecting rod.
In some embodiments, the assembling a stiffening beam on the assembling platform, installing a traction device on the traction platform, and using the traction device to pull the stiffening beam to slide towards the closure opening of the suspension bridge, further includes the following steps:
and a continuous jack is used as a traction device to pull the stiffening beam to slide towards the closure opening of the suspension bridge.
In some embodiments, the method further comprises the steps of:
and after the front end of the cantilever of the stiffening beam reaches the closure opening of the suspension bridge, installing the residual sling, adjusting the linear shape of the stiffening beam and the cable force of the sling, constructing the second-stage constant load, and performing a load test.
The technical scheme provided by the invention has the beneficial effects that:
the embodiment of the invention provides a method for erecting a stiffening beam of a large-span suspension bridge.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a flowchart of a method for erecting a stiffening beam of a large-span suspension bridge according to an embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating the step S1 performed in FIG. 1;
FIG. 3 is a schematic diagram illustrating the step S2 performed in FIG. 1;
fig. 4 is a first schematic diagram of fig. 1 for executing step S3;
FIG. 5 is a second schematic diagram illustrating the step S3 performed in FIG. 1;
FIG. 6 is a schematic diagram illustrating the step S4 performed in FIG. 1;
fig. 7 is a first schematic diagram of fig. 1 for performing step S5;
FIG. 8 is a second schematic diagram illustrating the step S5 performed in FIG. 1;
FIG. 9 is a third schematic diagram illustrating the execution of step S5 in FIG. 1;
in the figure: 1. a stiffening beam; 2. a main tower; 3. anchorage; 4. a main cable; 5. a sling set; 6. assembling a platform; 7. a traction platform; 8. a traction device; 9. a weight device; 10. a platform connecting rod; 11. assembling a workshop by using stiffening beams; 12. a counterforce seat.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The embodiment of the invention provides a method for erecting a stiffening beam of a large-span suspension bridge, which can solve the technical problems of high construction cost and high construction risk caused by the erection method of a cable crane in the prior art.
Referring to fig. 1, a method for erecting a stiffening beam of a large-span suspension bridge comprises the following steps:
and step S1, splicing the stiffening beam 1, and drawing the stiffening beam 1 to slide towards the closure opening of the suspension bridge.
Specifically, referring to fig. 2, in step S1, splicing the stiffening beam 1 and pulling the stiffening beam 1 to slide toward the closure opening of the suspension bridge specifically includes the following steps:
and constructing a main tower 2 and an anchorage 3 of the suspension bridge, and erecting a main cable 4 of the suspension bridge.
A plurality of sling sets 5 are arranged at preset positions of a main cable 4 of the suspension bridge.
And a splicing platform 6 and a traction platform 7 are erected by utilizing the space between the anchorage 3 and the main tower 2.
A stiffening beam 1 is assembled on an assembling platform 6, a traction device 8 is arranged on a traction platform 7, and the traction device 8 pulls the stiffening beam 1 to slide towards a closure opening of the suspension bridge.
Further, referring to fig. 2, when the stiffening beam 1 is assembled on the assembling platform 6, a stiffening beam assembling factory 11 is provided on the assembling platform 6, a gantry crane is used to hoist the sections of the stiffening beam 1 to the stiffening beam assembling factory 11, and the sections of the stiffening beam 1 are assembled in the stiffening beam assembling factory 11 to form a single stiffening beam 1 section.
Furthermore, referring to fig. 3, when the traction device 8 pulls the stiffening beam 1 to slide towards the closure opening of the suspension bridge, and after the front end of the stiffening beam 1 is cantilevered, the tail of the stiffening beam 1 is provided with the ballast device 9, and the ballast device 9 can avoid the risk of overturning the stiffening beam 1. According to the embodiment of the invention, the splicing platform 6 is connected with the traction platform 7 by using the platform connecting rod 10, and the splicing platform 6 and the traction platform 7 are connected into a whole, so that the splicing platform 6 or the traction platform 7 is prevented from inclining laterally in the traction process. The embodiment of the invention can adopt the continuous jack as the traction device 8 to draw the stiffening beam 1 to slide towards the closure opening of the suspension bridge, and the continuous jack has simple structure and convenient use. The stiffening beam 1 is usually provided with a reaction base 12, and the continuous jack pulls the stiffening beam 1 to slide toward the closure opening of the suspension bridge through the reaction base 12.
And furthermore, assembling the stiffening beam 1 on the assembling platform 6, installing a traction device 8 on the traction platform 7, and driving the stiffening beam 1 to slide towards the closure opening of the suspension bridge by the traction device 8, wherein the method specifically comprises the following steps:
step B1, assembling the first section of the stiffening beam 1 on the assembling platform 6, and dragging the first section of the stiffening beam 1 to slide towards the closure opening of the suspension bridge by the traction device 8;
step B2, adjusting the plane and elevation of the first section of the stiffening beam 1, assembling the next section of the stiffening beam 1, continuously drawing the first section of the stiffening beam 1 to slide towards the closure opening of the suspension bridge by the traction device 8,
and step B3, repeating the steps B1-B2 until the front end of the suspension arm of the stiffening beam 1 slides to the position below the first sling group 5.
Step S2, when the front end of the cantilever of the stiffening beam 1 slides to the lower side of the first sling group 5, the first sling group 5 is connected to the front end of the cantilever of the stiffening beam 1.
Specifically, as shown in fig. 3, in step S2, when the front end of the cantilever of the stiffening beam 1 slides below the first sling set 5, the method for connecting the first sling set 5 to the front end of the cantilever of the stiffening beam 1 specifically includes the following steps:
when the front end of the cantilever of the stiffening beam 1 slides to the lower part of the first sling group 5, the first sling of the first sling group 5 close to the shore base side is connected with the front end of the cantilever of the stiffening beam 1 group, and a jack of the first sling is tensioned.
And step S3, continuously drawing the stiffening beam 1 to slide towards the closure opening of the suspension bridge, and adjusting the connection point of the first sling group 5 and the stiffening beam 1.
Specifically, referring to fig. 4 and 5, in step S3, the method continues to pull the stiffening beam 1 to slide toward the closure opening of the suspension bridge, and adjusts the connection point of the first sling set 5 and the stiffening beam 1, and specifically includes the following steps:
step A1, pulling the stiffening beam 1 to continue to slide for the length of a segment stiffening beam 1, removing the connection between the first sling and the front end of the cantilever of the stiffening beam 1, and connecting the second sling of the first sling group 5 far away from the base side with the stiffening beam 1;
step A2, continuously dragging the stiffening beam 1 to slide the length of the half-section stiffening beam 1, removing the connection between the second sling and the stiffening beam 1, and connecting the first sling with the stiffening beam 1;
and step A3, repeating the steps A1-A2 until the front end of the suspension arm of the stiffening beam 1 slides to the position below the second sling group 5.
Step S4, when the front end of the cantilever of the stiffening beam 1 slides to the lower side of the second suspension cable set 5, the second suspension cable set 5 is connected to the front end of the cantilever of the stiffening beam 1. In particular, see FIG. 6.
And step S5, alternately drawing the stiffening beam 1 to slide and adjust the connection point of each sling group 5 and the stiffening beam 1 until the front end of the suspension arm of the stiffening beam 1 reaches the closure opening of the suspension bridge.
Specifically, referring to fig. 7 to 9, after the front end of the cantilever of the stiffening beam 1 reaches the closure opening of the suspension bridge, the remaining suspension cables are installed, the line shape of the stiffening beam 1 and the cable force of the suspension cables are adjusted, the second-stage constant load is constructed, and a load test is performed to ensure the safety of the bridge.
According to the method for erecting the stiffening beam of the large-span suspension bridge, the stiffening beam 1 is alternately pulled to slide and the connecting point of each sling group 5 and the stiffening beam 1 is adjusted by utilizing the plurality of sling groups 5 of the suspension bridge, so that the front end of the cantilever of the stiffening beam 1 reaches the closure opening of the suspension bridge, a cable crane is not used in the whole construction process, the construction cost is reduced, and the construction safety risk is small.
In the description of the present invention, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
It is to be noted that, in the present invention, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A method for erecting a stiffening beam of a large-span suspension bridge is characterized by comprising the following steps:
splicing the stiffening beam (1), and drawing the stiffening beam (1) to slide towards the closure opening of the suspension bridge;
when the front end of the cantilever of the stiffening beam (1) slides to the lower part of the first sling group (5), the first sling group (5) is connected with the front end of the cantilever of the stiffening beam (1);
continuously dragging the stiffening beam (1) to slide towards the closure opening of the suspension bridge, and adjusting the connection point of the first sling group (5) and the stiffening beam (1);
when the front end of the cantilever of the stiffening beam (1) slides to the lower part of the second sling group (5), the second sling group (5) is connected with the front end of the cantilever of the stiffening beam (1);
and alternately drawing the stiffening beam (1) to slide and adjust the connection point of each sling group (5) and the stiffening beam (1) until the front end of the cantilever of the stiffening beam (1) reaches the closure opening of the suspension bridge.
2. A method for erecting a stiffening beam for a large span suspension bridge according to claim 1, wherein said step of connecting the first set of slings (5) to the front end of the suspension arm of the stiffening beam (1) when the front end of the suspension arm of the stiffening beam (1) slides under the first set of slings (5) comprises the steps of:
when the front end of the cantilever of the stiffening beam (1) slides to the lower part of the first sling group (5), the first sling close to the shore base side of the first sling group (5) is connected with the front end of the cantilever of the stiffening beam (1), and a jack of the first sling is tensioned.
3. A method for erecting a stiffening beam of a large-span suspension bridge according to claim 2, wherein said continuously pulling the stiffening beam (1) to slide towards the closure opening of the suspension bridge and adjusting the connection point of the first sling set (5) and the stiffening beam (1) comprises the following steps:
step A1, drawing the stiffening beam (1) to continue to slide for the length of a section of the stiffening beam (1), removing the connection between a first sling and the front end of the cantilever of the stiffening beam (1), and connecting a second sling at the far side of the offshore base of the first sling group (5) with the stiffening beam (1);
step A2, continuously drawing the stiffening beam (1) to slide the length of the half-section stiffening beam (1), removing the connection between the second sling and the stiffening beam (1), and connecting the first sling with the stiffening beam (1);
and A3, repeating the steps A1-A2 until the front end of the cantilever of the stiffening beam (1) slides to the position below the second sling group (5).
4. A method for erecting a stiffening beam of a large-span suspension bridge according to claim 1, wherein said splicing stiffening beam (1) and said pulling stiffening beam (1) to slide towards the closure opening of the suspension bridge comprise the following steps:
constructing a main tower (2) and an anchorage (3) of the suspension bridge, and erecting a main cable (4) of the suspension bridge;
a plurality of sling sets (5) are arranged at preset positions of a main cable (4) of the suspension bridge;
a splicing platform (6) and a traction platform (7) are erected by utilizing the space between the anchorage (3) and the main tower (2);
the stiffening beam (1) is assembled on the assembling platform (6), the traction platform (7) is provided with the traction device (8), and the traction device (8) is used for drawing the stiffening beam (1) to slide towards the closure opening of the suspension bridge.
5. A method for erecting a stiffening beam of a large-span suspension bridge according to claim 4, wherein the stiffening beam (1) is assembled on an assembling platform (6), a traction device (8) is installed on a traction platform (7), and the stiffening beam (1) is dragged to slide towards a closure opening of the suspension bridge by the traction device (8), comprising the following steps:
step B1, assembling the head section of the stiffening beam (1) on the assembling platform (6), and dragging the head section of the stiffening beam (1) to slide towards the closure opening of the suspension bridge by a traction device (8);
step B2, adjusting the plane and elevation of the first section of the stiffening beam (1), assembling the next section of the stiffening beam (1), and continuing to draw the first section of the stiffening beam (1) to slide towards the closure opening of the suspension bridge by the traction device (8);
and B3, repeating the steps B1-B2 until the front end of the cantilever of the stiffening beam (1) slides to the position below the first sling group (5).
6. A method for erecting a stiffening beam of a large-span suspension bridge according to claim 5, wherein the stiffening beam (1) is assembled on an assembling platform (6), a traction device (8) is installed on a traction platform (7), and the stiffening beam (1) is dragged to slide towards a closure opening of the suspension bridge by the traction device (8), and the method further comprises the following steps:
a stiffening beam assembling workshop (11) is arranged on the assembling platform;
hoisting the sections of the stiffening beams (1) to a stiffening beam assembly workshop (11) by using a gantry crane;
and (3) assembling the sections of the stiffening beams (1) in sections in the stiffening beam assembling factory building (11) to form a single stiffening beam (1) section.
7. A method for erecting a stiffening beam of a large-span suspension bridge according to claim 5, wherein the stiffening beam (1) is assembled on an assembling platform (6), a traction device (8) is installed on a traction platform (7), and the stiffening beam (1) is dragged to slide towards a closure opening of the suspension bridge by the traction device (8), and the method further comprises the following steps:
after the front end of the stiffening beam (1) is cantilevered, a ballast device (9) is arranged at the tail part of the stiffening beam (1).
8. A method for erecting a stiffening beam of a large-span suspension bridge according to claim 4, wherein the stiffening beam (1) is assembled on an assembling platform (6), a traction device (8) is installed on a traction platform (7), and the stiffening beam (1) is dragged to slide towards a closure opening of the suspension bridge by the traction device (8), and the method further comprises the following steps:
the splicing platform (6) is connected with the traction platform (7) by a platform connecting rod (10).
9. A method for erecting a stiffening beam of a large-span suspension bridge according to claim 4, wherein the stiffening beam (1) is assembled on an assembling platform (6), a traction device (8) is installed on a traction platform (7), and the stiffening beam (1) is dragged to slide towards a closure opening of the suspension bridge by the traction device (8), and the method further comprises the following steps:
a continuous jack is used as a traction device (8) to pull the stiffening beam (1) to slide towards a closure opening of the suspension bridge.
10. A method for erecting a stiffening beam for a large-span suspension bridge according to claim 1, further comprising the steps of:
and after the front end of the cantilever of the stiffening beam (1) reaches the closure opening of the suspension bridge, installing the residual sling, adjusting the line shape of the stiffening beam (1) and the cable force of the sling, constructing the second-stage dead load, and performing a load test.
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| SU1030463A1 (en) * | 1982-03-31 | 1983-07-23 | Ордена Трудового Красного Знамени Центральный Научно-Исследовательский И Проектный Институт Строительных Металлоконструкций | Method of installation of prefabricated reinforcing beam of suspended and guy-rope bridges |
| SU1498875A1 (en) * | 1987-12-25 | 1989-08-07 | Государственный Проектно-Изыскательский Институт По Проектированию И Изысканиям Больших Мостов "Гипротрансмост" | Method of mounting a suspension bridge |
| JP2912222B2 (en) * | 1996-02-16 | 1999-06-28 | 川田工業株式会社 | Bridge girder construction method |
| CN101481903B (en) * | 2009-01-19 | 2010-09-22 | 华东交通大学 | Method for constructing hilly region rope-suspension bridge main beam by span cable supported crane assembling |
| CN106320182B (en) * | 2016-09-19 | 2019-06-25 | 中交第一公路工程局有限公司 | The long hoist cable of suspension bridge bank slope beam section, which is swung, moves mounting device and method |
| CN111691305A (en) * | 2020-06-11 | 2020-09-22 | 中交二公局第二工程有限公司 | Method for installing main beam of suspension bridge |
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|---|---|
| CN112695645A (en) | 2021-04-23 |
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