CN115387238B - Bridge girder erection method suitable for space crossing section - Google Patents
Bridge girder erection method suitable for space crossing section Download PDFInfo
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- CN115387238B CN115387238B CN202211139290.9A CN202211139290A CN115387238B CN 115387238 B CN115387238 B CN 115387238B CN 202211139290 A CN202211139290 A CN 202211139290A CN 115387238 B CN115387238 B CN 115387238B
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 230000007246 mechanism Effects 0.000 claims abstract description 92
- 229910000831 Steel Inorganic materials 0.000 claims description 18
- 239000010959 steel Substances 0.000 claims description 18
- 238000010276 construction Methods 0.000 abstract description 14
- 238000009434 installation Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000009417 prefabrication Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Abstract
The invention relates to a bridge girder erection method suitable for space crossing road sections, which comprises the following steps: the front end of the beam body to be erected is hung by a first travelling mechanism pocket, and the rear end of the beam body to be erected is lifted by a rear crown block, wherein the first travelling mechanism is positioned on a travelling platform erected below an existing line, and the height of the first travelling mechanism is smaller than the distance between the existing line and the travelling platform; the first travelling mechanism and the rear crown block are utilized to drive the beam body to be erected to move towards the bridge position to be erected, so that the first travelling mechanism drives the front end of the beam body to be erected to pass through the existing line from the lower part of the existing line; and a lifting mechanism I is arranged at the top of the travelling mechanism I to form a front crown block, and the front crown block and the rear crown block are used for moving the beam body to be erected to a position to be erected. The invention realizes crossing the existing line without damaging the existing structure and replacing equipment, and has the advantages of construction period assurance, safe and reliable structure, convenient installation, economy and applicability.
Description
Technical Field
The invention relates to the field of bridge engineering construction, in particular to a bridge girder erection method suitable for space crossing road sections.
Background
Along with the rapid development of the traffic infrastructure of China, the construction level of China can build bridges in various complex environments, and the traffic network is also continuously enriched and perfected. The cross construction of new and old lines, especially the bridge engineering construction of underpass existing lines, has a lot of difficulties, and newly built bridges are restricted by space condition factors such as the height, span and the like of the existing lines, and have great influence on the aspects of construction progress, cost and the like.
In the related technology, the bridge construction in China is greatly popularized and prefabricated construction is adopted, and the development is continuously carried out towards the industrial direction of the bridge. After the prefabrication of the bridge superstructure is completed in the prefabrication field, the bridge superstructure is transported to a bridge site through a transport vehicle, and then the bridge girder lifting machine is utilized for lifting and erecting, so that the construction quality and the construction speed are greatly improved. However, when the existing line is penetrated down, the bridge girder erection machine cannot be penetrated down through the existing line as a whole due to the limitation of clearance, so that great difficulty is brought to construction.
Disclosure of Invention
The embodiment of the invention provides a bridge girder erection method suitable for space crossing road sections, which aims to solve the problem that the bridge girder erection machine cannot integrally pass through the existing line due to the limit of clearance when the existing line is passed down in the related art, so that great difficulty is brought to construction.
The embodiment of the invention provides a bridge girder erection method suitable for space crossing sections, which comprises the following steps: the front end of the beam body to be erected is hung by a first travelling mechanism pocket, and the rear crown block lifts the rear end of the beam body to be erected, wherein the first travelling mechanism is positioned on a travelling platform erected below an existing line, and the height of the first travelling mechanism is smaller than the distance between the existing line and the travelling platform; the first travelling mechanism and the rear crown block are utilized to drive the beam body to be erected to move towards the bridge position to be erected, so that the first travelling mechanism drives the front end of the beam body to be erected to pass through the existing line from the lower part of the existing line; and a lifting mechanism I is arranged at the top of the travelling mechanism I to form a front crown block, and the front crown block and the rear crown block are used for moving the beam body to be erected to a position to be erected.
In some embodiments, the method further comprises moving the beam to be erected to a position to be erected by using the front crown block and the rear crown block, and further comprises the following steps: lifting the front end of the beam body to be erected by using the lifting mechanism I; releasing the pocket crane of the pair of beam bodies to be erected of the travelling mechanism; and finishing the beam falling of the beam body to be erected by using the front crown block and the rear crown block.
In some embodiments, the lifting the pair of beams to be erected from the travelling mechanism includes: and integrally lifting the beam body to be erected by utilizing the front crown block and the rear crown block, and then lifting the beam body to be erected by one pocket of the travelling mechanism.
In some embodiments, the beam falling of the beam body to be erected using the front crown block and the rear crown block includes: suspending the beam body to be erected above the bridge position to be erected by utilizing the front crown block and the rear crown block, and adjusting the plane position of the beam body to be erected; and the front crown block and the rear crown block are utilized to drop the beam body to be erected on the bridge position to be erected, so that the erection of the beam body to be erected is completed.
In some embodiments, the front end of the beam body to be erected is hung by using a travelling mechanism and a pocket, and the front end comprises: the beam body to be erected is conveyed to the front end of the erected beam body by utilizing a front beam conveying vehicle and a rear beam conveying vehicle; hanging any position of the front half section of the beam body to be erected by utilizing the rear overhead travelling crane pocket, and driving the front beam transporting vehicle withdraw; and then hanging the front end of the beam body to be erected by using the travelling mechanism.
In some embodiments, the rear end of the beam to be erected is suspended by the rear overhead travelling crane pocket, and the rear overhead travelling crane pocket comprises: removing the pocket hanging of the beam body to be erected by the rear crown block and moving the beam body to the rear end of the walking platform; and hanging any position of the rear half section of the beam body to be erected by utilizing the rear overhead travelling crane pocket, and driving the rear beam transporting vehicle withdraw.
In some embodiments, the hanging the beam body to be erected by using the rear overhead travelling crane pocket at any position of the rear half section comprises: the rear beam transporting vehicle and the travelling mechanism I are utilized to move forward to the rear end of the beam body to be erected and are aligned with the rear end of the travelling platform; and then the rear end of the beam body to be erected is hung by the rear overhead travelling crane pocket.
In some embodiments, a plurality of cross beams are fixed at the top of the first travelling mechanism; the reutilization of the front end of the beam body to be erected by the first pocket of the travelling mechanism comprises the following steps: and fixing a steel rope at the bottom of the cross beam, and bypassing the bottom of the beam body to be erected by using the steel rope to finish the pocket crane.
In some embodiments, the installing the lifting mechanism one on the top of the travelling mechanism one to form the front crown block includes: and hoisting the first lifting mechanism on the tops of the cross beams by using an automobile crane, wherein the automobile crane is positioned on the ground or the existing line.
In some embodiments, the winding the steel rope around the bottom of the beam body to be erected to complete the sling comprises: two lifting lugs are fixed at the bottom of each beam, wherein the two lifting lugs are arranged at intervals along the length direction of the beam, the steel rope is utilized to bypass the bottom of the beam body to be erected, and the two ends of the steel rope are in one-to-one correspondence with the two lifting lugs and are fixed with the corresponding lifting lugs.
The technical scheme provided by the invention has the beneficial effects that: the existing walking platform is fully utilized, the walking mechanism I and the rear crown block drive the beam body to be erected to move forwards, the walking mechanism I can pass through the lower part of the existing line, so that the first half section of the beam body to be erected is transported through the lower part of the existing line, and then the lifting mechanism I is lifted on the top of the walking mechanism I to form the front crown block, so that beam falling work can be completed through the lifting mechanisms of the front crown block and the rear crown block, the existing line is not damaged, equipment is not replaced, the beam body to be erected is traversed, the construction period is ensured, the structure is safe and reliable, the installation is convenient, and the beam body is economical and applicable.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic flow chart of a girder erecting method according to an embodiment of the present invention;
FIG. 2 is a schematic front view of an installed walking platform according to an embodiment of the present invention;
Fig. 3 is a schematic structural diagram of a beam to be erected of a front beam transporting vehicle and a rear beam transporting vehicle according to an embodiment of the present invention;
Fig. 4 is a schematic structural view of a beam to be erected of a rear overhead travelling crane pocket crane according to an embodiment of the present invention;
fig. 5 is a schematic structural view of a beam to be erected by a rear crown block and a travelling mechanism;
Fig. 6 is a schematic structural diagram of a beam to be erected for conveying by a rear crown block and a travelling mechanism provided by the embodiment of the invention;
Fig. 7 is a schematic structural diagram of a hoisting and lifting mechanism of an automobile crane according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a beam falling completion of a beam body to be erected according to an embodiment of the present invention;
Fig. 9 is a schematic side view structure of a beam body to be erected of a beam pocket crane according to an embodiment of the present invention.
In the figure: 1. a front crown block; 11. a first travelling mechanism; 12. a lifting mechanism I; 2. a rear crown block; 21. a second walking mechanism; 22. a lifting mechanism II; 3. a cross beam; 4. a front beam transporting vehicle; 5. a rear beam transporting vehicle; 6. a beam body to be erected; 7. a steel rope; 8. an existing line; 9. and a walking platform.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The embodiment of the invention provides a bridge girder erection method suitable for space crossing road sections, which aims to solve the problem that the bridge girder erection machine cannot integrally pass through the existing line due to the limit of clearance when the existing line is passed down in the related art, so that great difficulty is brought to construction.
Fig. 1 is a schematic flow chart of a method for bridging a frame beam applicable to a space intersection section according to an embodiment of the present invention. The bridge girder erection method comprises the following steps:
Step S100: the front end of the beam body 6 to be erected is hung by using the first 11 pocket of the travelling mechanism, and the rear crown block 2 lifts the rear end of the beam body 6 to be erected.
Step S101: the first travelling mechanism 11 and the rear crown block 2 are utilized to drive the beam body 6 to be erected to move towards the position to be erected, so that the first travelling mechanism 11 drives the front end of the beam body 6 to be erected to pass through the existing line 8 from the lower part of the existing line 8.
Step S102: a lifting mechanism I12 is arranged on the top of the travelling mechanism I11 to form a front crown block 1, and the front crown block 1 and the rear crown block 2 are used for moving the girder 6 to be erected to a position to be erected.
The specific operation steps are as follows:
Prior to step S100, it may include: as shown in fig. 2, the walking platform 9 is installed at the bridged beam and the to-be-bridged beam, and the front crown block 1 and the rear crown block 2 are ready on the walking platform 9. The existing line 8 is located above a bridge position to be erected, the walking platform 9 is a bridge girder erection machine and is located between the line to be erected and the existing line 8, the front crown block 1 comprises a first walking mechanism 11 and a first lifting mechanism 12, and the rear crown block 2 comprises a second walking mechanism 21 and a second lifting mechanism 22.
Prior to step S100, the method may further include: as shown in fig. 3, the lifting mechanism one 12 on the front crown block 1 is removed, and a plurality of cross beams 3 are installed on top of the traveling mechanism one 11 on the front crown block 1. The first lifting mechanism 12 is detached and taken down, so that the self height of the front crown block 1 can be reduced, and the first travelling mechanism 11 can pass through the lower part of the existing line 8 when travelling on the travelling platform 9.
In this embodiment, the number of the cross beams 3 is two, and the two cross beams 3 are arranged in parallel. In some embodiments, the number of the cross beams 3 may be three or four, according to the self weight of the beam body 6 to be erected, and the specific number is determined according to the situation.
Next, as shown in fig. 3-4, the beam 6 to be erected is transported to the front end of the erected beam by the front beam transporting vehicle 4 and the rear beam transporting vehicle 5, the rear crown block 2 is driven to move forward to any position of the front half section of the beam 6 to be erected, and the beam 6 to be erected is hung by the lifting mechanism II 22 of the rear crown block 2.
Preferably, in some embodiments, the rear crown block 2 is driven to move forward to the front end position of the beam body 6 to be erected for carrying out hanging, but is always positioned behind the first travelling mechanism 11, so that stable hanging work of the beam body 6 to be erected can be facilitated, and the bearing weight of the rear crown block 2 is reduced.
And the next step, the front beam transporting vehicle 4 withdraw can be driven to provide space for the first 11 pocket crane of the travelling mechanism to be erected beam 6.
In some alternative embodiments, step S100 may include: as shown in fig. 5, after the front end pocket of the beam body 6 to be erected is lifted by the first travelling mechanism 11, the beam body 6 to be erected is lifted by the rear crown block 2, the rear crown block 2 is driven to move backwards to the tail end of the travelling platform 9, the rear half section of the beam body 6 to be erected is lifted by the pocket, and after the pocket is lifted, the rear beam transporting vehicle 5 withdraw is driven, so that the pocket lifting work of the beam body 6 to be erected is completed.
Preferably, in some embodiments, the first travelling mechanism 11 carries out pocket hanging on the front end of the beam body 6 to be erected, and after the rear crown block 2 releases the pocket hanging, the rear travelling mechanism moves backwards and carries out pocket hanging on the rear end of the beam body 6 to be erected, so that the stability of the pocket hanging of the beam body 6 to be erected can be ensured, and the swing amplitude is small.
Specifically, as shown in fig. 9, both ends of the steel rope 7 bypass the bottom of the beam body 6 to be erected, and both ends of the steel rope are fixedly connected with the cross beam 3.
Preferably, in some embodiments, two lifting lugs are fixed at the bottom of each beam 3, where the two lifting lugs are arranged at intervals along the length direction of the beam 3, the steel rope 7 is used to bypass the bottom of the beam body 6 to be erected, and two ends of the steel rope 7 are in one-to-one correspondence with the two lifting lugs and fixed with the corresponding lifting lugs. The steel rope 7 can be conveniently connected and fixed through the lifting lug, the steel rope is fixedly firm, and meanwhile the steel rope is convenient to detach and unlock or fix.
Preferably, in some embodiments, stiffening plates are arranged at positions of the cross beam 3 corresponding to the lifting lugs and the first travelling mechanism 11 respectively, so that the rigidity of the cross beam 3 is improved and the local stability of the cross beam 3 is ensured.
Step S101 may include: as shown in fig. 6, the first travelling mechanism 11 and the rear crown block 2 are driven to move forward, the first travelling mechanism 11 is lower than the height between the travelling platform 9 and the existing line 8, and the first travelling mechanism 11 can pass through the lower part of the existing line 8, wherein the existing line 8 is located between the first travelling mechanism 11 and the rear crown block 2.
Next, as shown in fig. 7, the car is hoisted to the existing line 8, the lifting mechanism one 12 on the erected beam is hoisted, and the car is transferred from the upper part of the existing line 8 to the upper part of the travelling mechanism one 11, and the lifting mechanism one 12 is hoisted on the plurality of cross beams 3.
Preferably, in some embodiments, the truck suspension may be located to hoist the lifting mechanism one 12.
Step S102 may include: as shown in fig. 8, the front crown block 1 and the rear crown block 2 integrally lift the beam body 6 to be erected, at this time, the plurality of cross beams 3 do not carry out hanging with the beam body 6 to be erected, so that the buckles and the loose hooks on the lifting lugs are convenient to be released, and after the beam body 6 to be erected is not hung with the traveling mechanism one 11, the beam falling is carried out on the beam body 6 to be erected through the lifting mechanism one 12 of the front crown block 1 and the lifting mechanism two 22 of the rear crown block 2.
Specifically, the first lifting mechanism 12 of the front crown block 1 and the second lifting mechanism 22 of the rear crown block 2 are utilized to suspend the beam body 6 to be erected above the bridge position to be erected, the plane position of the beam body 6 to be erected is longitudinally and longitudinally adjusted, the beam falling work is completed after the adjustment is completed, and the beam body 6 to be erected can be ensured to be correctly and correctly located at the bridge position to be erected.
Preferably, in some embodiments, the first lifting mechanism 12 of the front crown block 1 and the second lifting mechanism 22 of the rear crown block 2 suspend the beam 6 to be erected 20cm above the bridge to be erected, and of course, the height value can be adjusted according to practical situations, so that the staff can observe the plane position of the beam 6 to be erected conveniently to finish the erection of the beam 6 to be erected.
In the description of the present invention, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present invention. Unless specifically stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
It should 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. Moreover, 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 one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing is only a specific embodiment of the invention to enable those skilled in the art to understand or practice the 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 (8)
1. A bridge girder erection method suitable for space crossing sections, comprising the steps of:
The front end of a beam body (6) to be erected is hung by a first travelling mechanism (11), and the rear end of the beam body (6) to be erected is lifted by a rear crown block (2), wherein the first travelling mechanism (11) is positioned on a travelling platform erected below an existing line, and the height of the first travelling mechanism (11) is smaller than the distance between the existing line and the travelling platform;
The first travelling mechanism (11) and the rear crown block (2) are utilized to drive the beam body (6) to be erected to move towards the position to be erected, so that the first travelling mechanism (11) drives the front end of the beam body (6) to be erected to pass through the existing line (8) from the lower part of the existing line (8);
A lifting mechanism I (12) is arranged at the top of the travelling mechanism I (11) to form a front crown block (1), and the front crown block (1) and the rear crown block (2) are used for moving the beam body (6) to be erected to a position to be erected;
The front crown block (1) and the rear crown block (2) are used for moving the beam body (6) to be erected to a position to be erected, and the method further comprises the following steps:
Lifting the front end of the beam body (6) to be erected by using the lifting mechanism I (12);
releasing the pocket hanging of the first travelling mechanism (11) on the beam body (6) to be erected;
the front crown block (1) and the rear crown block (2) are used for completing beam falling of the beam body (6) to be erected;
The step of removing the pocket hanging of the first travelling mechanism (11) on the beam body (6) to be erected comprises the following steps:
and integrally lifting the beam body (6) to be erected by utilizing the front crown block (1) and the rear crown block (2), and then lifting the beam body (6) to be erected by the first travelling mechanism (11).
2. The bridge girder erection method suitable for the space crossing section according to claim 1, wherein: the beam falling of the beam body (6) to be erected is completed by using the front crown block (1) and the rear crown block (2), and the beam falling device comprises:
Suspending the beam body (6) to be erected above the bridge position to be erected by utilizing the front crown block (1) and the rear crown block (2), and adjusting the plane position of the beam body (6) to be erected;
and the front crown block (1) and the rear crown block (2) are utilized to drop the beam body (6) to be erected on the bridge position to be erected, so that the erection of the beam body (6) to be erected is completed.
3. The bridge girder erection method suitable for the space crossing section according to claim 1, wherein: the front end of the beam body (6) to be erected is hung by a first traveling mechanism (11) pocket, and the beam body comprises:
The beam body (6) to be erected is conveyed to the front end of the erected beam body by utilizing a front beam conveying vehicle (4) and a rear beam conveying vehicle (5);
the rear crown block (2) is used for suspending any position of the front half section of the beam body (6) to be erected in a pocket manner, and the front beam transporting vehicle (4) withdraw is driven;
And then the front end of the beam body (6) to be erected is hung by the first travelling mechanism (11).
4. A method of erecting a bridge girder suitable for use in space crossing sections as claimed in claim 3, wherein: the rear crown block (2) is used for hanging the rear end of the beam body (6) to be erected in a pocket mode, and comprises the following components:
Removing the pocket hanging of the beam body (6) to be erected by the rear crown block (2) and moving the beam body to the rear end of the walking platform;
and (3) hanging any position of the rear half section of the beam body (6) to be erected by utilizing the rear crown block (2) in a pocket manner, and driving the rear beam transporting vehicle (5) withdraw.
5. The bridge girder erection method for the space crossing section according to claim 4, wherein: the rear half section of the beam body (6) to be erected is hung by the rear crown block (2) in a pocket mode, and the rear half section comprises:
The rear beam transporting vehicle (5) and the first travelling mechanism (11) are utilized to move forward to the rear end of the beam body (6) to be erected and are basically aligned with the rear end of the travelling platform;
and then the rear crown block (2) is used for suspending the rear end of the beam body (6) to be erected.
6. A method of erecting a bridge girder suitable for use in space crossing sections as claimed in claim 3, wherein: a plurality of cross beams (3) are fixed at the top of the first travelling mechanism (11); the step of reusing the first travelling mechanism (11) to pocket and hang the front end of the beam body (6) to be erected comprises the following steps:
And fixing a steel rope (7) at the bottom of the cross beam (3), and bypassing the bottom of the beam body (6) to be erected by using the steel rope (7) to finish hanging.
7. The bridge girder erection method for the space crossing section according to claim 6, wherein: the lifting mechanism I (12) is arranged at the top of the travelling mechanism I (11) to form a front crown block (1), and the front crown block comprises:
And hoisting the lifting mechanism I (12) on the tops of the cross beams (3) by using an automobile crane, wherein the automobile crane is positioned on the ground or the existing line (8).
8. The bridge girder erection method for the space crossing section according to claim 6, wherein: the steel rope (7) is utilized to bypass the bottom of the beam body (6) to be erected to finish the pocket crane, and the pocket crane comprises the following components:
Two lifting lugs are fixed at the bottom of each beam (3), wherein the two lifting lugs are arranged at intervals along the length direction of the beams (3), the steel rope (7) is utilized to bypass the bottom of the beam body (6) to be erected, and two ends of the steel rope (7) are in one-to-one correspondence with the two lifting lugs and are fixed with the corresponding lifting lugs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211139290.9A CN115387238B (en) | 2022-09-19 | Bridge girder erection method suitable for space crossing section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211139290.9A CN115387238B (en) | 2022-09-19 | Bridge girder erection method suitable for space crossing section |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115387238A CN115387238A (en) | 2022-11-25 |
| CN115387238B true CN115387238B (en) | 2024-07-09 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113802467A (en) * | 2021-10-27 | 2021-12-17 | 重庆城建控股(集团)有限责任公司 | Large-gradient beam erecting method based on bridge girder erection machine |
| CN114057115A (en) * | 2021-12-20 | 2022-02-18 | 中交第二航务工程局有限公司 | Split type cable crane and construction method |
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113802467A (en) * | 2021-10-27 | 2021-12-17 | 重庆城建控股(集团)有限责任公司 | Large-gradient beam erecting method based on bridge girder erection machine |
| CN114057115A (en) * | 2021-12-20 | 2022-02-18 | 中交第二航务工程局有限公司 | Split type cable crane and construction method |
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