CN113174872A - River-crossing concrete box girder old bridge dismantling method based on floating bridge - Google Patents
River-crossing concrete box girder old bridge dismantling method based on floating bridge Download PDFInfo
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- CN113174872A CN113174872A CN202110566637.7A CN202110566637A CN113174872A CN 113174872 A CN113174872 A CN 113174872A CN 202110566637 A CN202110566637 A CN 202110566637A CN 113174872 A CN113174872 A CN 113174872A
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- bridge
- box girder
- dismantling
- cutting
- floating
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- 238000007667 floating Methods 0.000 title claims abstract description 50
- 239000004567 concrete Substances 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000010276 construction Methods 0.000 claims abstract description 35
- 238000002360 preparation method Methods 0.000 claims abstract description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 19
- 239000010959 steel Substances 0.000 claims description 19
- 229910003460 diamond Inorganic materials 0.000 claims description 9
- 239000010432 diamond Substances 0.000 claims description 9
- 238000009434 installation Methods 0.000 claims description 9
- 238000005553 drilling Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 239000010426 asphalt Substances 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 claims description 3
- 239000011150 reinforced concrete Substances 0.000 claims description 3
- 239000002893 slag Substances 0.000 claims description 3
- 238000005422 blasting Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000007847 structural defect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
Abstract
The invention discloses a method for dismantling an old river-crossing concrete box girder bridge based on a floating bridge, which comprises the following steps of: 1) carrying out preparation work for dismantling the concrete box girder; 2) dismantling the bridge deck pavement, and dismantling the auxiliary devices; 3) laying a load-carrying floating bridge on the river surface of the bridge bottom, and stopping the transport vehicle onto the floating bridge; 4) dismantling the box girder main body, cutting the box girder main body into a plurality of sections, hoisting the box girder main body to a transport vehicle staying on the floating bridge, and then transporting the box girder main body away by the transport vehicle; 5) finally, the support on the bridge pier is clear, and is also hung on a transport vehicle on the floating bridge and then is transported away by the vehicle; 6) and (5) dismantling the floating bridge after the bridge is dismantled. According to the invention, the floating bridge is erected at the bottom of the bridge, so that the cut concrete box girder can be directly and vertically hung on a transport vehicle after being cut, the concrete box girder is prevented from being transferred by a large margin, the hoisting efficiency is improved, the construction difficulty is greatly reduced, the construction safety is greatly improved, the construction period is greatly shortened, and the construction cost can be comprehensively reduced.
Description
Technical Field
The invention relates to the technical field of bridge construction, in particular to a method for dismantling an old river-crossing concrete box girder bridge based on a floating bridge.
Background
Along with the rapid increase of urban traffic volume and traffic axle load, the requirements on the traffic capacity and service level of the bridge are continuously improved, most of early concrete box bridges are difficult to meet the driving requirements under the conditions of large traffic volume and high load at present, and along with the appearance of structural defects and engineering diseases of the self panel of the concrete box bridge, the structural safety and normal traffic of the existing concrete box bridge are influenced, so that dangerous bridges or old bridges which are not suitable for continuous use need to be removed in time, and at present, the bridge is usually removed by adopting a method of blasting or mechanical removal. The blasting demolition method has been mature after years of development, particularly the development of the control blasting and static blasting technologies, so that the application range and depth of the blasting technology are greatly increased, but the blasting technology is difficult to use for river-crossing, river-crossing or mountain-crossing bridges.
The existing concrete box girder old bridge is dismantled, the existing bridge is mainly dismantled by a mechanical cutting method, the bridge deck is dismantled firstly, then piers are dismantled, and the concrete box girder of the bridge deck is cut, then is hung to the bridge head or the bridge tail through a crane or a winch and then is transported away by a vehicle. However, the concrete box girder has large weight, wastes time and labor in the hoisting process, and has huge cost, high construction difficulty and poor construction safety.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide the method for dismantling the river-crossing concrete box girder old bridge based on the floating bridge, which has the advantages of simple hoisting process, low cost, low construction difficulty and good construction safety.
In order to achieve the purpose, the invention is realized by the following technical scheme: a river-crossing concrete box girder old bridge dismantling method based on a floating bridge comprises the following steps:
(1) carrying out preparation work for dismantling the concrete box girder;
(2) dismantling the bridge deck pavement, and dismantling the auxiliary devices;
(3) laying a load-carrying floating bridge on the river surface of the bridge bottom, and stopping the transport vehicle onto the floating bridge;
(4) dismantling the box girder main body, cutting the box girder main body into a plurality of sections, hoisting the box girder main body to a transport vehicle staying on the floating bridge, and then transporting the box girder main body away by the transport vehicle;
(5) finally, the support on the bridge pier is clear, and is also hung on a transport vehicle on the floating bridge and then is transported away by the vehicle;
(6) and (5) dismantling the floating bridge after the bridge is dismantled.
The working principle of the technical scheme is that after the bridge floor facility is dismantled, the load-carrying floating bridge is erected at the bridge bottom, so that the influence on the erection of the lower floating bridge in the process of dismantling the bridge floor facility can be avoided; the concrete box girder after the cutting is demolishd can be directly through crane or hoist engine hang perpendicularly to the fortune roof beam car on the load pontoon, then directly will cut the concrete steel beam that finishes by the fortune roof beam car and carry away, and it has avoided transport concrete box girder by a wide margin, has improved hoist and mount efficiency, and the construction degree of difficulty greatly reduced, and the construction security is very improved.
In order to better implement the method of the present invention, further, in step (1), the preparation for dismantling the concrete box girder includes:
(1.1) removing the concrete box girder, cutting by using a wire saw, simulating a multi-configuration cutting machine during entering, carrying out maintenance and debugging before entering, and carrying out construction on a plurality of operation surfaces in a full-bridge manner according to the overall construction schedule arrangement;
(1.2) fencing the construction site, arranging the construction site and dredging traffic;
(1.3) facilities such as under-bridge greening and the like need to be moved in advance, and after hardening, a bracket is erected;
and (1.4) connecting water and electricity to the old bridge deck.
In order to better implement the method of the present invention, further, in the step (2), the dismantling of the bridge deck pavement specifically includes:
(2.1) the bridge floor guardrail, the drain pipe and the weak current pipe are gradually dismantled from top to bottom;
and (2.2) firstly removing the asphalt bridge deck pavement, and then loading and transporting.
In order to better implement the method of the present invention, further, in step (3), the process of laying the load-carrying pontoon is as follows:
(3.1) before installation, arranging a reinforced concrete gravity bed of 2m multiplied by 2.5m on the bank side, embedding a steel pipe of 720 multiplied by 50mm in the bed, fixing one end of a bearing cable on the steel pipe, and fixing the other end of the bearing cable on an embedded part of 22= pier cable tower;
(3.2) hanging the buoyancy tanks on a bearing cable through steel cables (an open type single pulley is used during installation, and the opening type single pulley is converted into a cable clamp for fixation after being in place), and drawing the buoyancy tanks to the water surface one by one through a drawing cable on a positioning ship;
(3.3) adjusting the distance between the buoyancy tanks, and longitudinally connecting the channel steel by hanging and buckling until the installation work of the longitudinally connected channel steel is finished;
(3.4) adjusting the length of a hanging cable between the buoyancy tank and the bearing cable to adjust the straightness of the floating bridge;
and (3.5) finally, mounting the bridge deck steel plate net and the railings.
In order to better implement the method of the present invention, further, in the step (4), the dismantling process of dismantling the box girder main body is as follows:
(4.1) firstly, measuring and marking lines on the box girder, marking the positions of the rope saws, and drilling 1 hoisting hole in the middle of each section of the box girder;
(4.2) then adopting a diamond wire saw mode: cutting a middle section box chamber in each span, wherein the cutting length of each section is 2m, cutting and hoisting each section of the full section to the position below the bridge, cutting and decomposing the box chambers into four pieces, respectively cutting flange plates at two sides, centering and cutting the box chambers, and finally hoisting and transporting the cut bridge box chambers;
(4.3) cutting the end cross beam and the middle cross beam, wherein the cutting length of each section is 1.22-1.94 m, each section of the full-section is cut and hoisted to a transport vehicle on the floating bridge, then the box chamber is cut and decomposed into four pieces, the flange plates on two sides are respectively cut, the box chamber is cut in a centering way, and finally the cut bridge box chamber is hoisted and transported outside.
In order to better implement the method of the present invention, further, in the step (5), the pier dismantling process further includes:
(5.1) removing the support on the pier body, erecting a construction platform near the pier stud, removing the pier cap and the pier stud, and cutting off the joint of the pier cap and the pier stud by using a diamond wire saw to lift the pier cap away;
(5.2) when the pier stud is removed, drilling 1 hoisting hole on the pier stud, fixing the pier stud by using a crane, cutting off and hoisting the pier stud at the bottom of the pier stud by using a diamond rope saw, hoisting the pier stud to a floating bridge removing transport vehicle, and transporting the pier stud to a slag removing field for crushing.
Compared with the prior art, the invention has the following advantages and beneficial effects:
(1) according to the invention, the load-carrying floating bridge is erected at the bottom of the bridge, so that the cut concrete box girder can be directly and vertically hung on a transport vehicle after being cut, thereby avoiding the large-scale transfer of the concrete box girder, improving the hoisting efficiency, greatly reducing the construction difficulty and greatly improving the construction safety;
(2) according to the invention, the cut concrete box girder can be rapidly transported out by erecting the load-carrying floating bridge, and the load-carrying floating bridge can be rapidly and simply dismantled after the bridge is dismantled, so that the construction time of a broken path is short and great adverse effect cannot be caused because the dismantling time of the bridge can be greatly shortened;
(3) according to the invention, through setting up the load floating bridge and calculation and verification, compared with the traditional transfer concrete box girder, the construction period can be shortened by half, and at present, the labor cost is higher and higher, the actual construction cost is reduced compared with the original cost, and the method is suitable for wide popularization and application.
Detailed Description
The present invention will be described in further detail with reference to the following examples for the purpose of making clear the objects, process conditions and advantages of the present invention, but the embodiments of the present invention are not limited thereto, and various substitutions and modifications can be made according to the common technical knowledge and the conventional means in the art without departing from the technical idea of the present invention described above, and the specific examples described herein are only for explaining the present invention and are not intended to limit the present invention.
Example 1:
the embodiment provides a method for dismantling an old river-crossing concrete box girder bridge based on a floating bridge, which comprises the following steps:
(1) carrying out preparation work for dismantling the concrete box girder;
(2) dismantling the bridge deck pavement, and dismantling the auxiliary devices;
(3) laying a load-carrying floating bridge on the river surface of the bridge bottom, and stopping the transport vehicle onto the floating bridge;
(4) dismantling the box girder main body, cutting the box girder main body into a plurality of sections, hoisting the box girder main body to a transport vehicle staying on the floating bridge, and then transporting the box girder main body away by the transport vehicle;
(5) finally, the support on the bridge pier is clear, and is also hung on a transport vehicle on the floating bridge and then is transported away by the vehicle;
(6) and (5) dismantling the floating bridge after the bridge is dismantled.
The load-carrying floating bridge is erected at the bottom of the bridge, so that the cut concrete box girder can be directly and vertically hung on a transport vehicle after being cut, the concrete box girder is prevented from being transferred by a large margin, the hoisting efficiency is improved, the construction difficulty is greatly reduced, and the construction safety is greatly improved; after the bridge is dismantled, the load-bearing floating bridge can be quickly and simply dismantled, and the dismantling time of the bridge can be greatly shortened, so that the construction time of a broken road is short, and the great adverse effect can not be caused; through calculation verification, compare in traditional concrete box roof beam of transporting, can shorten half a time limit for a project, at today that human cost is higher and higher, construction cost in reality compares originally, reduces to some extent, suitable extensive popularization and application.
Example 2:
this embodiment is further defined on the basis of the above embodiment, in step (1), the performing preparation for dismantling the concrete box girder includes:
(1.1) removing the concrete box girder, cutting by using a wire saw, simulating a multi-configuration cutting machine during entering, carrying out maintenance and debugging before entering, and carrying out construction on a plurality of operation surfaces in a full-bridge manner according to the overall construction schedule arrangement;
(1.2) fencing the construction site, arranging the construction site and dredging traffic;
(1.3) facilities such as under-bridge greening and the like need to be moved in advance, and after hardening, a bracket is erected;
and (1.4) connecting water and electricity to the old bridge deck. Other parts of this embodiment are the same as those of the above embodiment, and are not described again.
Example 3:
this embodiment is further defined on the basis of the foregoing embodiment, in step (2), the removing the bridge deck pavement includes:
(2.1) the bridge floor guardrail, the drain pipe and the weak current pipe are gradually dismantled from top to bottom;
and (2.2) firstly removing the asphalt bridge deck pavement, and then loading and transporting. Other parts of this embodiment are the same as those of the above embodiment, and are not described again.
Example 4:
this embodiment is further defined on the basis of the above embodiment, in step (3), the process of laying the load-carrying pontoon is as follows:
(3.1) before installation, arranging a reinforced concrete gravity bed of 2m multiplied by 2.5m on the bank side, embedding a steel pipe of 720 multiplied by 50mm in the bed, fixing one end of a bearing cable on the steel pipe, and fixing the other end of the bearing cable on an embedded part of 22= pier cable tower;
(3.2) hanging the buoyancy tanks on a bearing cable through steel cables (an open type single pulley is used during installation, and the opening type single pulley is converted into a cable clamp for fixation after being in place), and drawing the buoyancy tanks to the water surface one by one through a drawing cable on a positioning ship;
(3.3) adjusting the distance between the buoyancy tanks, and longitudinally connecting the channel steel by hanging and buckling until the installation work of the longitudinally connected channel steel is finished;
(3.4) adjusting the length of a hanging cable between the buoyancy tank and the bearing cable to adjust the straightness of the floating bridge;
and (3.5) finally, mounting the bridge deck steel plate net and the railings. Other parts of this embodiment are the same as those of the above embodiment, and are not described again.
Example 5:
this embodiment is further defined on the basis of the above embodiment, in step (4), the dismantling process for dismantling the box girder main body includes:
(4.1) firstly, measuring and marking lines on the box girder, marking the positions of the rope saws, and drilling 1 hoisting hole in the middle of each section of the box girder;
(4.2) then adopting a diamond wire saw mode: cutting a middle section box chamber in each span, wherein the cutting length of each section is 2m, cutting and hoisting each section of the full section to the position below the bridge, cutting and decomposing the box chambers into four pieces, respectively cutting flange plates at two sides, centering and cutting the box chambers, and finally hoisting and transporting the cut bridge box chambers;
(4.3) cutting the end cross beam and the middle cross beam, wherein the cutting length of each section is 1.22-1.94 m, each section of the full-section is cut and hoisted to a transport vehicle on the floating bridge, then the box chamber is cut and decomposed into four pieces, the flange plates on two sides are respectively cut, the box chamber is cut in a centering way, and finally the cut bridge box chamber is hoisted and transported outside. Other parts of this embodiment are the same as those of the above embodiment, and are not described again.
Example 6:
in this embodiment, based on the above embodiment, it is further defined that, in the step (5), the removing process of the pier is further:
(5.1) removing the support on the pier body, erecting a construction platform near the pier stud, removing the pier cap and the pier stud, and cutting off the joint of the pier cap and the pier stud by using a diamond wire saw to lift the pier cap away;
(5.2) when the pier stud is removed, drilling 1 hoisting hole on the pier stud, fixing the pier stud by using a crane, cutting off and hoisting the pier stud at the bottom of the pier stud by using a diamond rope saw, hoisting the pier stud to a floating bridge removing transport vehicle, and transporting the pier stud to a slag removing field for crushing. Other parts of this embodiment are the same as those of the above embodiment, and are not described again.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (6)
1. A river-crossing concrete box girder old bridge dismantling method based on a floating bridge is characterized by comprising the following steps:
(1) carrying out preparation work for dismantling the concrete box girder;
(2) dismantling the bridge deck pavement, and dismantling the auxiliary devices;
(3) laying a load-carrying floating bridge on the river surface of the bridge bottom, and stopping the transport vehicle onto the floating bridge;
(4) dismantling the box girder main body, cutting the box girder main body into a plurality of sections, hoisting the box girder main body to a transport vehicle staying on the floating bridge, and then transporting the box girder main body away by the transport vehicle;
(5) finally, the support on the bridge pier is clear, and is also hung on a transport vehicle on the floating bridge and then is transported away by the vehicle;
(6) and (5) dismantling the floating bridge after the bridge is dismantled.
2. The method for dismantling the concrete box girder across the river based on the floating bridge as claimed in claim 1, wherein in the step (1), the preparation work for dismantling the concrete box girder comprises:
(1.1) removing the concrete box girder, cutting by using a wire saw, simulating a multi-configuration cutting machine during entering, carrying out maintenance and debugging before entering, and carrying out construction on a plurality of operation surfaces in a full-bridge manner according to the overall construction schedule arrangement;
(1.2) fencing the construction site, arranging the construction site and dredging traffic;
(1.3) facilities such as under-bridge greening and the like need to be moved in advance, and after hardening, a bracket is erected;
and (1.4) connecting water and electricity to the old bridge deck.
3. The method for dismantling the old river-crossing concrete box girder bridge based on the floating bridge as claimed in claim 1 or 2, wherein in the step (2), the bridge deck pavement is dismantled, and the auxiliary dismantling specifically comprises:
(2.1) the bridge floor guardrail, the drain pipe and the weak current pipe are gradually dismantled from top to bottom;
and (2.2) firstly removing the asphalt bridge deck pavement, and then loading and transporting.
4. The method for dismantling the concrete box girder across river based on the pontoon as recited in claim 3, wherein in the step (3), the process of laying the load-carrying pontoon is as follows:
(3.1) before installation, arranging a reinforced concrete gravity bed of 2m multiplied by 2.5m on the bank side, embedding a steel pipe of 720 multiplied by 50mm in the bed, fixing one end of a bearing cable on the steel pipe, and fixing the other end of the bearing cable on an embedded part of 22= pier cable tower;
(3.2) hanging the buoyancy tanks on a bearing cable through steel cables (an open type single pulley is used during installation, and the opening type single pulley is converted into a cable clamp for fixation after being in place), and drawing the buoyancy tanks to the water surface one by one through a drawing cable on a positioning ship;
(3.3) adjusting the distance between the buoyancy tanks, and longitudinally connecting the channel steel by hanging and buckling until the installation work of the longitudinally connected channel steel is finished;
(3.4) adjusting the length of a hanging cable between the buoyancy tank and the bearing cable to adjust the straightness of the floating bridge;
and (3.5) finally, mounting the bridge deck steel plate net and the railings.
5. The method for dismantling the concrete box girder across river based on the floating bridge as claimed in claim 1 or 2, wherein in the step (4), the dismantling process for dismantling the box girder main body is as follows:
(4.1) firstly, measuring and marking lines on the box girder, marking the positions of the rope saws, and drilling 1 hoisting hole in the middle of each section of the box girder;
(4.2) then adopting a diamond wire saw mode: cutting a middle section box chamber in each span, wherein the cutting length of each section is 2m, cutting and hoisting each section of the full section to the position below the bridge, cutting and decomposing the box chambers into four pieces, respectively cutting flange plates at two sides, centering and cutting the box chambers, and finally hoisting and transporting the cut bridge box chambers;
(4.3) cutting the end cross beam and the middle cross beam, wherein the cutting length of each section is 1.22-1.94 m, each section of the full-section is cut and hoisted to a transport vehicle on the floating bridge, then the box chamber is cut and decomposed into four pieces, the flange plates on two sides are respectively cut, the box chamber is cut in a centering way, and finally the cut bridge box chamber is hoisted and transported outside.
6. The method for dismantling the concrete box girder across river based on the floating bridge according to claim 1 or 2, wherein in the step (5), the dismantling process of the pier is further as follows:
(5.1) removing the support on the pier body, erecting a construction platform near the pier stud, removing the pier cap and the pier stud, and cutting off the joint of the pier cap and the pier stud by using a diamond wire saw to lift the pier cap away;
(5.2) when the pier stud is removed, drilling 1 hoisting hole on the pier stud, fixing the pier stud by using a crane, cutting off and hoisting the pier stud at the bottom of the pier stud by using a diamond rope saw, hoisting the pier stud to a floating bridge removing transport vehicle, and transporting the pier stud to a slag removing field for crushing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110566637.7A CN113174872A (en) | 2021-05-24 | 2021-05-24 | River-crossing concrete box girder old bridge dismantling method based on floating bridge |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110566637.7A CN113174872A (en) | 2021-05-24 | 2021-05-24 | River-crossing concrete box girder old bridge dismantling method based on floating bridge |
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| CN113174872A true CN113174872A (en) | 2021-07-27 |
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| CN202110566637.7A Pending CN113174872A (en) | 2021-05-24 | 2021-05-24 | River-crossing concrete box girder old bridge dismantling method based on floating bridge |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201605523U (en) * | 2009-10-27 | 2010-10-13 | 贵州省桥梁工程总公司 | Suspension cable type floating bridge |
| CN103981800A (en) * | 2014-04-25 | 2014-08-13 | 浙江省隧道工程公司 | Float bridge system and float bridge construction method |
| JP2017020290A (en) * | 2015-07-14 | 2017-01-26 | オリエンタル白石株式会社 | Disassembling method of bridge |
| CN110984002A (en) * | 2020-01-17 | 2020-04-10 | 广东冠粤路桥有限公司 | Bridge deck auxiliary structure and method for dismantling cantilever box girder of main bridge T-shaped structure |
| CN111778883A (en) * | 2020-07-16 | 2020-10-16 | 保利长大工程有限公司 | Non-unbalance-load quick dismantling method for multi-span concrete rigid frame arch bridge |
-
2021
- 2021-05-24 CN CN202110566637.7A patent/CN113174872A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201605523U (en) * | 2009-10-27 | 2010-10-13 | 贵州省桥梁工程总公司 | Suspension cable type floating bridge |
| CN103981800A (en) * | 2014-04-25 | 2014-08-13 | 浙江省隧道工程公司 | Float bridge system and float bridge construction method |
| JP2017020290A (en) * | 2015-07-14 | 2017-01-26 | オリエンタル白石株式会社 | Disassembling method of bridge |
| CN110984002A (en) * | 2020-01-17 | 2020-04-10 | 广东冠粤路桥有限公司 | Bridge deck auxiliary structure and method for dismantling cantilever box girder of main bridge T-shaped structure |
| CN111778883A (en) * | 2020-07-16 | 2020-10-16 | 保利长大工程有限公司 | Non-unbalance-load quick dismantling method for multi-span concrete rigid frame arch bridge |
Non-Patent Citations (1)
| Title |
|---|
| 四川省公路学会工程施工专业委员会: "《隧道 桥梁 道路 水港》", 电子科技大学出版社 * |
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Application publication date: 20210727 |