CN111254832B - Integral hoisting closure method and system for long section of cable-stayed bridge steel girder - Google Patents
Integral hoisting closure method and system for long section of cable-stayed bridge steel girder Download PDFInfo
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- CN111254832B CN111254832B CN202010075024.9A CN202010075024A CN111254832B CN 111254832 B CN111254832 B CN 111254832B CN 202010075024 A CN202010075024 A CN 202010075024A CN 111254832 B CN111254832 B CN 111254832B
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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
- E01D11/04—Cable-stayed bridges
Abstract
The invention discloses a method and a system for integrally hoisting and closing a long section of a steel girder of a cable-stayed bridge, which relate to the technical field of bridge closing construction, and comprise the following steps: hoisting the beam section to be installed to the area to be installed between the main tower and the auxiliary pier by using a hoisting device; placing one end of the beam section to be installed, which is close to the auxiliary pier, at the auxiliary pier-side closure by using a jacking type bracket system, and placing one end of the beam section to be installed, which is close to the main tower, at a pier-side bracket system at the main tower-side closure; adjusting the corner of the beam section to be installed, which is close to the main tower side, to match with the closure opening on the main tower side and then connect; adjusting the elevation of the beam section to be installed close to the auxiliary pier side to be consistent with the elevation of the closure opening on the auxiliary pier side; and adjusting the corner of the side span beam section close to the auxiliary pier side closure opening to be matched with the corner of the beam section to be installed and then connecting the corner. On the premise of reducing the construction cost, the invention adjusts the included angle of the closure opening, so that the stress condition of the main beam in the bridge forming stage meets the design requirement.
Description
Technical Field
The invention relates to the technical field of bridge closure construction, in particular to a method and a system for integrally hoisting and closing a long section of a steel girder of a cable-stayed bridge.
Background
The common cross section of the main steel beam of the cable-stayed bridge comprises a steel box girder and a steel truss girder, and in the common erection construction of the main steel beam of the cable-stayed bridge, the tower section is integrally hoisted by adopting a floating crane, and the hoisting of the sub-span and the mid-span by adopting crane sections is a common construction method.
For the common installation process of the steel main beam of the cable-stayed bridge, the hoisting of the secondary side span and the midspan beam section is realized by symmetrically hoisting the central line of the main tower, one crane is needed for the secondary side span and the midspan, and four cranes are needed for the double-tower cable-stayed bridge. However, the construction cost of the crane is generally high, the beam section which can be constructed by hoisting the crane section at the secondary side span is generally hoisted integrally by the floating crane long section at one time, the long section steel beam is hoisted integrally and has two closure openings at the main tower side and the auxiliary pier side, the long section steel beam is hoisted integrally, the midspan of the long section steel beam is displaced downwards under the action of self weight to cause the end part of the long section steel beam to generate corner displacement, and the corner displacement is inconsistent with the corner displacement of the two closure openings of the installed tower area beam section and the auxiliary pier top beam section, so that matching closure can not be performed.
In order to solve the above problems, the conventional method is to adjust the elevations of the two closure openings to be consistent, i.e. to perform permanent connection, and according to the principle of the stress-free state law, under the condition that the boundary conditions of the bridge are not changed, the stress-free state included angle of connection between the beam sections is changed, so that the internal force of the main beam in the bridge forming stage can be changed.
Therefore, a new bridge closure technical scheme is needed, and the unstressed included angle of the closure opening is adjusted, so that the stress condition of the main beam in the bridge forming stage meets the design requirement.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a method and a system for integrally hoisting and closing a long section of a steel main beam of a cable-stayed bridge, which are used for adjusting the included angle of a closing opening by utilizing a jacking bracket system, an elevation adjusting system and a jacking bracket system on the premise of reducing the construction cost, so that the stress condition of the main beam at the bridge forming stage meets the design requirement.
In order to achieve the above purposes, the technical scheme adopted by the invention is as follows:
the invention discloses a method for integrally hoisting and closing a long section of a steel girder of a cable-stayed bridge, which comprises the following steps:
hoisting the beam section to be installed to the area to be installed between the main tower and the auxiliary pier by using a hoisting device;
placing one end of the beam section to be installed, which is close to the auxiliary pier, at the auxiliary pier-side closure by using a jacking type bracket system, and placing one end of the beam section to be installed, which is close to the main tower, at a pier-side bracket system at the main tower-side closure;
adjusting the corner of the beam section to be installed, which is close to the main tower side, by using the jacking bracket system, and connecting the beam section to be installed after matching with a closure opening on the main tower side;
adjusting the elevation of the beam section to be installed close to the auxiliary pier side by using the jacking type bracket system, so that the elevation of the beam section to be installed close to the auxiliary pier side is consistent with the elevation of the closure gap on the auxiliary pier side;
adjusting the corner of the side span beam section close to the auxiliary pier side closure opening by using an elevation adjusting system arranged on the top surface of the transition pier, and connecting the side span beam section with the beam section to be installed after the corner of the side span beam section close to the auxiliary pier side closure opening is matched with the corner of the beam section to be installed; wherein the content of the first and second substances,
the method is characterized in that one end, close to the auxiliary pier, of the beam section to be installed is placed at a closure of the side of the auxiliary pier by using a jacking bracket system, and comprises the following steps:
arranging a first jack device at the closure opening on the side of the auxiliary pier;
arranging one end of the lifting bracket system on the first jack device, and arranging the other end of the lifting bracket system on the top surface of the beam section to be installed;
a suspender structure used for placing the beam section to be installed is arranged in the middle of the jacking bracket system;
placing one end of the beam section to be installed, which is close to the auxiliary pier, at a closure on the side of the auxiliary pier by using the suspender structure;
the method is characterized in that an elevation adjusting system arranged on the top surface of the transition pier is used for adjusting the corner of the side span beam section close to the closing port on the side of the auxiliary pier, and the method comprises the following steps:
an elevation adjusting system is arranged between the top surface of the transition pier and the bottom surface of the side span beam section;
and adjusting the self height of the elevation adjusting system to adjust the corner of the side span beam section close to the closing opening on the side of the auxiliary pier.
On the basis of the technical scheme, the first jack device comprises at least one pair of jacks.
On the basis of the technical scheme, the step of placing one end, close to the main tower, of the beam section to be installed on a pier-side bracket system at a closure on the side of the main tower specifically comprises the following steps:
arranging the pier-side bracket system at the side of the main tower close to the closure of the main tower side;
arranging a second jack device on the top surface of the pier-side support system;
and placing one end of the beam section to be installed, which is close to the main tower, at a closure of the side of the main tower by using the second jack device and the pier-side bracket system.
On the basis of the technical scheme, the second jack device comprises at least one pair of jacks.
On the basis of the technical scheme, the elevation adjusting system comprises at least one third jack device;
the third jack means comprises at least one pair of jacks.
On the basis of the technical scheme, the hoisting of the beam section to be installed to the area to be installed between the main tower and the auxiliary pier specifically comprises the following steps:
arranging a hoisting device near an area to be installed;
and hoisting the beam section to be installed to the area to be installed between the main tower and the auxiliary pier by using the hoisting device.
On the basis of the technical scheme, the method for adjusting the corner of the auxiliary pier side closure opening of the side span beam section by using the elevation adjusting system arranged on the top of the transition pier further comprises the following steps of after the corner of the auxiliary pier side closure opening of the side span beam section is matched with the corner of the beam section to be installed and the side span beam section is connected with the beam section to be installed:
removing the lifting device.
In a second aspect, the invention also discloses a cable-stayed bridge steel girder long section integral hoisting closure system, which comprises:
the hoisting device is used for hoisting the beam section to be installed to the area to be installed between the main tower and the auxiliary pier;
the pier-side support system is used for supporting one end, close to the main tower, of the beam section to be installed at a closure on the side of the main tower;
the jacking bracket system is used for placing one end, close to the auxiliary pier, of the beam section to be installed at the auxiliary pier side closure;
the jacking bracket system is also used for adjusting the corner of the beam section to be installed, which is close to the main tower side, so that the corner of the beam section to be installed, which is close to the main tower side, is matched with the closure opening on the main tower side;
the jacking bracket system is also used for adjusting the elevation of the beam section to be installed close to the auxiliary pier side after the beam section to be installed is connected with the closure opening on the main tower side, so that the elevation of the beam section to be installed close to the auxiliary pier side is consistent with the elevation of the closure opening on the auxiliary pier side;
and the elevation adjusting system is used for adjusting the corner of the side span beam section close to the auxiliary pier side closure opening, so that the corner of the side span beam section close to the auxiliary pier side closure opening is matched with the corner of the beam section to be installed.
Compared with the prior art, the invention has the advantages that:
on the premise of reducing the construction cost, the invention utilizes the jacking bracket system, the elevation adjusting system and the jacking bracket system to adjust the unstressed included angle of the closure opening, so that the stress condition of the main beam at the bridge forming stage meets the design requirement.
Drawings
FIG. 1 is a flowchart of steps of a method for integrally hoisting and closing a long section of a steel girder of a medium-cable-stayed bridge according to an embodiment of the invention;
FIG. 2 is a flowchart of steps A1-A4 in a method for integrally hoisting and closing a long section of a steel girder of a cable-stayed bridge according to an embodiment of the invention;
FIG. 3 is a flowchart of steps B1-B3 in the method for integrally hoisting and closing the long sections of the steel main beams of the cable-stayed bridge according to the embodiment of the invention;
FIG. 4 is a flowchart of steps C1-C2 in the method for integrally hoisting and closing the long sections of the steel main beams of the cable-stayed bridge according to the embodiment of the invention;
FIG. 5 is a flowchart of steps M1-M2 in the method for integrally hoisting and closing a long section of a steel girder of a cable-stayed bridge according to the embodiment of the invention;
fig. 6 is an assembly schematic view of a cable-stayed bridge steel girder long section integral hoisting closure system in the second embodiment of the invention;
fig. 7 is an assembly schematic view of a hoisting device in a cable-stayed bridge steel girder long section integral hoisting closure system in the second embodiment of the invention;
fig. 8 is a schematic structural view of a beam section to be installed and an auxiliary pier side closure opening in a cable-stayed bridge steel main beam long section integral hoisting closure system in the second embodiment of the invention before adjustment;
fig. 9 is a schematic structural view of a beam section to be installed and a closing opening at the main tower side in a cable-stayed bridge steel main beam long section integral hoisting closing system in the second embodiment of the invention before adjustment;
fig. 10 is a schematic structural view of a beam section to be installed and an auxiliary pier side closure opening in a cable-stayed bridge steel main beam long section integral hoisting closure system in the second embodiment of the invention after adjustment;
fig. 11 is a schematic structural view of a long-section integral hoisting closure system of a steel main beam of a cable-stayed bridge according to the second embodiment of the invention, after adjustment, of a beam section to be installed and a closure opening at the side of a main tower;
in the figure: 1. a hoisting device; 2. a pier-side rack system; 3. a jack-up carriage system; 4. an elevation adjustment system; 5. a first jack device; 6. a boom structure; 60. a boom; 61. a cross bar; 7. a second jack device; 8. a third jack device; 9. and (5) mounting the beam section.
Detailed Description
Embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
The embodiment of the invention provides a method and a system for integrally hoisting and closing a long section of a steel main beam of a cable-stayed bridge, which are used for adjusting a stress-free included angle of a closing opening by utilizing a jacking type bracket system, an elevation adjusting system and a jacking type bracket system on the premise of reducing the construction cost, so that the stress condition of the main beam in a bridge forming stage meets the design requirement.
In order to achieve the technical effects, the general idea of the application is as follows:
a method for integrally hoisting and closing a long section of a steel girder of a cable-stayed bridge comprises the following steps:
s1, hoisting the beam section to be installed to the area to be installed between the main tower and the auxiliary pier by using the hoisting device;
s2, placing one end of the beam section to be installed, which is close to the auxiliary pier, at the auxiliary pier-side closure by using the jacking bracket system, and placing one end of the beam section to be installed, which is close to the main tower, at the pier-side bracket system at the main tower-side closure;
s3, adjusting the corner of the beam section to be installed, which is close to the main tower side, by using a jacking type bracket system, and connecting the beam section to be installed after matching with the closure opening on the main tower side;
s4, adjusting the elevation of the beam section to be installed close to the auxiliary pier side by using the jacking type bracket system, so that the elevation of the beam section to be installed close to the auxiliary pier side is consistent with the elevation of the closure gap on the auxiliary pier side;
and S5, adjusting the corner of the side span beam section close to the auxiliary pier side closure opening by using an elevation adjusting system arranged on the top surface of the transition pier, and connecting the side span beam section with the beam section to be installed after the corner of the side span beam section close to the auxiliary pier side closure opening is matched with the corner of the beam section to be installed.
Embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
Example one
Referring to fig. 1 to 5, an embodiment of the present invention provides a method for integrally hoisting and closing a long section of a steel main beam of a cable-stayed bridge, including the following steps:
s1, hoisting the beam section to be installed to the area to be installed between the main tower and the auxiliary pier by using the hoisting device;
s2, placing one end of the beam section to be installed, which is close to the auxiliary pier, at the auxiliary pier-side closure by using the jacking bracket system, and placing one end of the beam section to be installed, which is close to the main tower, at the pier-side bracket system at the main tower-side closure;
s3, adjusting the corner of the beam section to be installed, which is close to the main tower side, by using a jacking type bracket system, and connecting the beam section to be installed after matching with the closure opening on the main tower side;
s4, adjusting the elevation of the beam section to be installed close to the auxiliary pier side by using the jacking type bracket system, so that the elevation of the beam section to be installed close to the auxiliary pier side is consistent with the elevation of the closure gap on the auxiliary pier side;
and S5, adjusting the corner of the side span beam section close to the auxiliary pier side closure opening by using an elevation adjusting system arranged on the top surface of the transition pier, and connecting the side span beam section with the beam section to be installed after the corner of the side span beam section close to the auxiliary pier side closure opening is matched with the corner of the beam section to be installed.
In the embodiment of the invention, on the premise of reducing the construction cost, the included angle of the closure opening is adjusted by using the jacking bracket system, the elevation adjusting system and the jacking bracket system, so that the stress condition of the main beam at the bridge forming stage meets the design requirement.
The beam section to be installed can be a long-section beam section.
It should be noted that, through the jacking bracket system and the elevation adjusting system, the situation that the corner displacement of the end part of the long-section span is inconsistent with the corner displacement of two closure openings of the beam section of the installed tower area and the top beam section of the auxiliary pier due to the downward displacement of the long-section span under the action of self weight is overcome.
In another embodiment of the present invention, the step S2 of placing one end of the beam segment to be installed, which is close to the auxiliary pier, at the closure of the side of the auxiliary pier by using the lifting bracket system specifically includes the following steps:
a1, arranging a first jack device at a closure opening at the side of the auxiliary pier;
a2, arranging one end of the lifting bracket system on a first jack device, and arranging the other end on the top surface of a beam section to be installed;
a3, arranging a suspender structure for placing a beam section to be installed in the middle of the jacking bracket system;
and A4, placing one end of the beam section to be installed, which is close to the auxiliary pier, at the side closure of the auxiliary pier by using a suspender structure.
It should be noted that the first jack device includes at least one pair of jacks;
specifically, the two jacks are arranged side by side.
In another implementation manner of the embodiment of the present invention, the step S2 of placing one end of the beam segment to be installed, which is close to the main tower, on the pier-side bracket system at the closure of the main tower side includes the following specific steps:
b1, arranging a pier-side bracket system on the side of the main tower close to the closure of the main tower side;
b2, arranging a second jack device on the top surface of the pier-side support system;
and B3, placing one end of the beam section to be installed, which is close to the main tower, at the side closure of the main tower by using a second jack device and a pier side bracket system.
It should be noted that the second jack device includes at least one pair of jacks;
specifically, the two jacks are arranged side by side.
Specifically, the pier-side support system is arranged on one side, close to the main tower side closure opening, of the main tower, the top surface of the pier-side support system extends to the position below the main tower side closure opening, the second jack device is arranged on the top surface of the pier-side support system and located below the main tower side closure opening, and one end, close to the main tower, of the beam section to be installed is placed on the top surface of the second jack device.
In another embodiment of the present invention, the step S5 of adjusting the corner of the side span beam segment near the closing opening on the side of the auxiliary pier by using the elevation adjustment system disposed on the top surface of the transition pier specifically includes the following steps:
c1, arranging an elevation adjusting system on the top surface of the transition pier;
and C2, adjusting the self height of the elevation adjusting system to adjust the corner of the side span beam section close to the closing opening on the side of the auxiliary pier.
It should be noted that the elevation adjustment system comprises at least one third jack device;
the third jack device comprises at least one pair of jacks;
specifically, the two jacks are arranged side by side.
During specific implementation, the height of the jack of the height adjusting system is adjusted, so that the height of the steel beam at the transition pier position of the side span beam section is adjusted, the height position of the auxiliary pier top is unchanged, and the corner of the side span beam section close to the auxiliary pier side closure opening can be adjusted.
In another implementation manner of the embodiment of the present invention, the hoisting the beam segment to be installed into the area to be installed between the main tower and the auxiliary pier in step S1 specifically includes the following steps:
m1, arranging a hoisting device near the region to be installed;
m2, hoisting the beam section to be installed to the area to be installed between the main tower and the auxiliary pier by using the hoisting device.
In another embodiment of the present invention, the method for adjusting the corner of the side closure opening of the auxiliary pier of the side span beam section by using the elevation adjustment system arranged at the top of the transition pier further includes the following steps:
and removing the hoisting device.
It should be noted that the hoisting device may be a common crane, a floating crane or other hoisting equipment, and the selection of the specific equipment needs to consider the geographical environment of the actual construction.
Example two
Referring to fig. 6 to 11, a second embodiment of the present invention provides a cable-stayed bridge steel girder long section integral hoisting closure system, including:
the hoisting device 1 is used for hoisting the beam section 9 to be installed to an area to be installed between the main tower and the auxiliary pier;
the pier-side support system 2 is used for supporting one end, close to the main tower, of the beam section 9 to be installed at a closure on the side of the main tower;
the jacking bracket system 3 is used for placing one end, close to the auxiliary pier, of the beam section 9 to be installed at the auxiliary pier side closure;
the jacking bracket system 3 is also used for adjusting the corner of the beam section to be installed 9 close to the main tower side, so that the corner of the beam section to be installed close to the main tower side is matched with the closure opening on the main tower side;
the jacking bracket system 3 is also used for adjusting the elevation of the beam section 9 to be installed close to the auxiliary pier side after the beam section 9 to be installed is connected with the main tower side closure opening, so that the elevation of the beam section 9 to be installed close to the auxiliary pier side is consistent with the elevation of the auxiliary pier side closure opening;
and the elevation adjusting system 4 is used for adjusting the corner of the side span beam section close to the auxiliary pier side closure opening, so that the corner of the side span beam section close to the auxiliary pier side closure opening is matched with the corner of the beam section 9 to be installed.
According to the embodiment of the invention, on the premise of reducing the construction cost, the stress-free included angle of the closure opening is adjusted by using the jacking bracket system, the elevation adjusting system and the jacking bracket system, so that the stress condition of the main beam in the bridge forming stage meets the design requirement.
In another implementation manner of the embodiment of the present invention, the system further includes:
the first jack device 5 is arranged at the joint of the auxiliary pier side;
the suspender structure 6 is arranged in the middle of the jacking bracket system 3 and is used for placing a beam section 9 to be installed; wherein the content of the first and second substances,
one end of the jacking bracket system 3 is arranged on the first jack device 5, the other end of the jacking bracket system is arranged on the top surface of the beam section 9 to be installed, and the suspender structure 6 is arranged in the middle of the jacking bracket system 3 and is used for arranging one end, close to the auxiliary pier, of the beam section 9 to be installed at the closure of the side of the auxiliary pier;
it should be noted that the first jack device 5 includes at least one pair of jacks, and the boom structure 6 includes at least 1 pair of booms 60 disposed on two sides of the middle portion of the lifting bracket system 3 and a cross bar 61 connected to the bottom ends of the two booms 60, and the cross bar 61 is used for supporting the bottom of the beam section 9 to be installed.
In another implementation manner of the embodiment of the present invention, the system further includes:
a second jack device 7 arranged on the top surface of the pier-side support system 2;
the second jack device 7 is matched with the pier-side bracket system 2 and is used for supporting one end, close to the main tower side closure opening, of the beam section 9 to be installed.
It should be noted that the second jack device 7 includes at least one pair of jacks.
In another embodiment of the present embodiment, the elevation adjustment system 5 comprises at least one third jack device 8;
the third jack means 8 comprises at least one pair of jacks.
It should be noted that the hoisting device 1 may be a common crane, a floating crane or other hoisting equipment, and the selection of the specific equipment needs to consider the geographical environment of the actual construction.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (8)
1. The integral hoisting closure method for the long sections of the steel main beams of the cable-stayed bridge is characterized by comprising the following steps of:
hoisting the beam section to be installed to the area to be installed between the main tower and the auxiliary pier by using a hoisting device;
placing one end of the beam section to be installed, which is close to the auxiliary pier, at the auxiliary pier-side closure by using a jacking type bracket system, and placing one end of the beam section to be installed, which is close to the main tower, at a pier-side bracket system at the main tower-side closure;
adjusting the corner of the beam section to be installed, which is close to the main tower side, by using the jacking bracket system, and connecting the beam section to be installed after matching with a closure opening on the main tower side;
adjusting the elevation of the beam section to be installed close to the auxiliary pier side by using the jacking type bracket system, so that the elevation of the beam section to be installed close to the auxiliary pier side is consistent with the elevation of the closure gap on the auxiliary pier side;
adjusting the corner of the side span beam section close to the auxiliary pier side closure opening by using an elevation adjusting system arranged on the top surface of the transition pier, and connecting the side span beam section with the beam section to be installed after the corner of the side span beam section close to the auxiliary pier side closure opening is matched with the corner of the beam section to be installed; wherein the content of the first and second substances,
the method is characterized in that one end, close to the auxiliary pier, of the beam section to be installed is placed at a closure of the side of the auxiliary pier by using a jacking bracket system, and comprises the following steps:
arranging a first jack device at the closure opening on the side of the auxiliary pier;
arranging one end of the lifting bracket system on the first jack device, and arranging the other end of the lifting bracket system on the top surface of the beam section to be installed;
a suspender structure used for placing the beam section to be installed is arranged in the middle of the jacking bracket system;
placing one end of the beam section to be installed, which is close to the auxiliary pier, at a closure on the side of the auxiliary pier by using the suspender structure;
the method is characterized in that an elevation adjusting system arranged on the top surface of the transition pier is used for adjusting the corner of the side span beam section close to the closing port on the side of the auxiliary pier, and the method comprises the following steps:
an elevation adjusting system is arranged between the top surface of the transition pier and the bottom surface of the side span beam section;
and adjusting the self height of the elevation adjusting system to adjust the corner of the side span beam section close to the closing opening on the side of the auxiliary pier.
2. The integral hoisting closure method for the long sections of the main steel beams of the cable-stayed bridge according to claim 1, characterized in that: the first jack device comprises at least one pair of jacks.
3. The integral hoisting closure method for the long sections of the main steel beams of the cable-stayed bridge according to claim 1, wherein the step of placing one end of the beam section to be installed, which is close to the main tower, on a pier-side bracket system at a closure entrance at the side of the main tower specifically comprises the following steps:
arranging the pier-side bracket system at the side of the main tower close to the closure of the main tower side;
arranging a second jack device on the top surface of the pier-side support system;
and placing one end of the beam section to be installed, which is close to the main tower, at a closure of the side of the main tower by using the second jack device and the pier-side bracket system.
4. The integral hoisting closure method for the long sections of the main steel beams of the cable-stayed bridge according to claim 3, characterized in that:
the second jack means comprises at least one pair of jacks.
5. The integral hoisting closure method for the long sections of the main steel beams of the cable-stayed bridge according to claim 3, characterized in that:
the elevation adjustment system comprises at least one third jack device;
the third jack means comprises at least one pair of jacks.
6. The integral hoisting closure method for the long sections of the steel main beams of the cable-stayed bridge according to claim 1, wherein the step of hoisting the beam sections to be installed into the area to be installed between the main tower and the auxiliary pier specifically comprises the following steps:
arranging a hoisting device near an area to be installed;
and hoisting the beam section to be installed to the area to be installed between the main tower and the auxiliary pier by using the hoisting device.
7. The integral hoisting closure method for the long sections of the main steel beams of the cable-stayed bridge according to claim 4, wherein the method for integrally hoisting and closing the long sections of the main steel beams of the cable-stayed bridge is characterized in that an elevation adjusting system arranged at the top of a transition pier is used for adjusting the corner of the auxiliary pier-side closure opening of the side-span beam section, and after the corner of the auxiliary pier-side closure opening of the side-span beam section is matched with the corner of the beam section to be installed, the method for integrally hoisting and closing the long sections of the main steel beams of the cable-stayed bridge further comprises the following steps:
removing the lifting device.
8. The utility model provides a cable-stay bridge steel girder long segment section integral hoisting closure system which characterized in that, the system includes:
the hoisting device is used for hoisting the beam section to be installed to the area to be installed between the main tower and the auxiliary pier;
the pier-side support system is used for supporting one end, close to the main tower, of the beam section to be installed at a closure on the side of the main tower;
the jacking bracket system is used for placing one end, close to the auxiliary pier, of the beam section to be installed at the auxiliary pier side closure;
the jacking bracket system is also used for adjusting the corner of the beam section to be installed, which is close to the main tower side, so that the corner of the beam section to be installed, which is close to the main tower side, is matched with the closure opening on the main tower side;
the jacking bracket system is also used for adjusting the elevation of the beam section to be installed close to the auxiliary pier side after the beam section to be installed is connected with the closure opening on the main tower side, so that the elevation of the beam section to be installed close to the auxiliary pier side is consistent with the elevation of the closure opening on the auxiliary pier side;
and the elevation adjusting system is used for adjusting the corner of the side span beam section close to the auxiliary pier side closure opening, so that the corner of the side span beam section close to the auxiliary pier side closure opening is matched with the corner of the beam section to be installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010075024.9A CN111254832B (en) | 2020-01-21 | 2020-01-21 | Integral hoisting closure method and system for long section of cable-stayed bridge steel girder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010075024.9A CN111254832B (en) | 2020-01-21 | 2020-01-21 | Integral hoisting closure method and system for long section of cable-stayed bridge steel girder |
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| CN101935985B (en) * | 2010-09-19 | 2011-11-23 | 湖南路桥建设集团公司 | Mid-span closure method for steel box girder of cable stayed bridge |
| CN102493362B (en) * | 2011-11-24 | 2013-11-20 | 中铁二十三局集团有限公司 | Construction method for midspan closure segment of longspan continuous rigid frame bridge |
| CN103603262B (en) * | 2013-12-09 | 2015-11-11 | 中铁二十三局集团有限公司 | The linear control method of slant height pier long-span continuous beam |
| CN105970832B (en) * | 2016-05-24 | 2017-11-17 | 西安公路研究院 | A kind of continuous rigid frame bridge closure segment pushing tow system and pushing tow method for correcting error |
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| CN107386125B (en) * | 2017-09-01 | 2019-04-26 | 崔欣 | A kind of construction method that Steel Box Girder of Self-Anchored Suspension beam closes up |
| CN108004924B (en) * | 2017-11-29 | 2021-01-22 | 中交路桥华南工程有限公司 | Method for folding middle span section of double-tower double-cable-surface mixed type steel-concrete superposed beam cable-stayed bridge |
| KR101926440B1 (en) * | 2018-02-05 | 2019-02-13 | 알엔비이엔씨 주식회사 | Psc girder manufacture method,the psc girder and girdrr manufacturing system |
| CN109778716B (en) * | 2019-01-04 | 2021-06-04 | 腾达建设集团股份有限公司 | Plane position adjusting method for cantilever bridge folding opening |
| CN109629439B (en) * | 2019-01-15 | 2020-06-05 | 中铁一局集团有限公司 | Construction method of single-tower cable-stayed bridge |
| CN109944170A (en) * | 2019-05-06 | 2019-06-28 | 重庆建工市政交通工程有限责任公司 | Continuous beam with high-pier end bay Cast-in-Situ Segment and closure section integrated construction system and construction method |
| CN110172927A (en) * | 2019-07-09 | 2019-08-27 | 招商局重庆交通科研设计院有限公司 | The span centre of prestressed concrete continuous beam and continuous rigid frame closes up section constructing method |
| CN110644367A (en) * | 2019-09-19 | 2020-01-03 | 中铁大桥科学研究院有限公司 | Closure method and closure system for steel box girder of cable-stayed bridge |
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