CN111535190A - Bridge mounting and dismounting construction method with high safety - Google Patents
Bridge mounting and dismounting construction method with high safety Download PDFInfo
- Publication number
- CN111535190A CN111535190A CN202010383474.4A CN202010383474A CN111535190A CN 111535190 A CN111535190 A CN 111535190A CN 202010383474 A CN202010383474 A CN 202010383474A CN 111535190 A CN111535190 A CN 111535190A
- Authority
- CN
- China
- Prior art keywords
- bridge
- construction
- cutting
- section
- safety
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
-
- 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 relates to the technical field of bridge construction, and discloses a bridge mounting and dismounting construction method with high safety.A stable bracket is erected at the lower side of a concrete bridge section to be dismounted; fixing an anti-collision wall of a concrete bridge section to be removed on a bridge floor by using a chain block, and then cutting the anti-collision wall; after the anti-collision wall is cut, drilling at least four hoisting holes on each beam plate to be removed, and fixedly connecting the beam plates with a bridge girder erection machine through traction steel ropes to enable the whole section of beam plate to be in a hoisting state and then performing cutting operation; correspondingly connecting a lifting hook of the lifting equipment with the steel structure bridge assembly, and lifting the steel structure bridge assembly on the safety support by using the lifting equipment; and installing and constructing the steel structure bridge assembly to complete the construction of the new bridge section. The bridge mounting and dismounting construction method with high safety has the advantages that the safety in bridge mounting and dismounting construction is greatly improved, the procedures are precise and orderly, and the construction safety of workers can be well guaranteed.
Description
Technical Field
The invention relates to the technical field of bridge construction, in particular to a bridge mounting and dismounting construction method with high safety.
Background
In recent years, with the rapid development of national traffic infrastructure, part of expressways built at an early stage cannot completely meet the current traffic demand, and the existing expressways are increasingly reconstructed and expanded. Particularly, the original high-speed highway bridge spanning the existing railway line has reduced bearing capacity and can not meet increasingly heavy traffic load quickly, and the work of reinforcing and reconstructing the bridge with insufficient bearing capacity is urgent.
In the field of bridge construction, especially in the construction and construction of viaducts, the original viaducts are mostly dismantled and rebuilt or modified, and the original viaducts are mostly concrete bridges and need to be modified into steel structure bridges so as to meet the requirements of the existing society better.
Some processes are not strict orderly enough in the construction of tearing open to ann of bridge at present for there is not little potential safety hazard in actual construction, and the safe construction operation that stably lasts is not convenient for, has influenced the progress efficiency that the construction was torn open to ann of bridge.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides the bridge mounting and dismounting construction method with high safety, which has the advantages of greatly improving the safety in bridge mounting and dismounting construction, ensuring strict and ordered working procedures and well ensuring the construction safety of workers, and solves the problems that some working procedures in the bridge mounting and dismounting construction are not strict and ordered enough, so that small potential safety hazards exist in actual construction, stable and continuous safe construction operation is inconvenient, and the progress efficiency of bridge mounting and dismounting construction is influenced.
(II) technical scheme
In order to greatly improve the safety in bridge mounting and dismounting construction, have strict and ordered working procedures and can well ensure the construction safety of workers, the invention provides the following technical scheme: a bridge mounting and dismounting construction method with high safety comprises the following steps:
s1, preparation of engineering equipment
Calculating the quantity of various devices required in bridge mounting and dismounting construction according to design requirements and field conditions, and preparing bridge erecting machines, girder lifting machines, girder transporting gun trucks, air compression crushing machines, cutting machines, electric welding machines and chain hoists in corresponding quantity;
s2, arranging entry labor force
Calculating the quantity of various pulling forces required in the bridge mounting and dismounting construction according to design requirements and field conditions, and arranging a cutting group, a drilling machine crushing group, a hoisting and loading beam group, a prefabricating group and a reinforcing steel bar group which correspond to the number of people;
s3, entering a material field
Arranging various materials to enter a construction site, immediately arranging relevant personnel to carry out relevant detection and control on the required materials, supply places and quality after entering the site, and ensuring that subsequent construction can be stably carried out;
s4, erection of safety support
Erecting a temporary stabilizing support on the lower side of a concrete bridge section to be dismantled;
s5, equipment is in place
All equipment required in the installation and disassembly construction is quickly moved to a specified station position for fixing after being assembled and debugged, and the continuous and stable operation of the subsequent construction is ensured;
s6, dismantling construction of old bridge
a. Fixing the anti-collision wall of the concrete bridge section to be removed on the bridge floor by using a chain block for stabilizing, avoiding the problem of potential safety hazard caused by falling of a cutting section after cutting is finished, and then performing cutting work on the anti-collision wall;
b. after the cutting of the anti-collision wall is finished, drilling at least four hoisting holes on each beam plate to be removed, and fixedly connecting the beam plates with a bridge girder erection machine through traction steel ropes, so that the whole section of beam plate is in a hoisting state and then performing cutting operation, and hoisting and loading are not performed until the whole cutting section is split;
s7, assembling and building new bridge section
c. Correspondingly connecting a lifting hook of the lifting equipment with a beam taking port reserved in the steel structure bridge assembly, and lifting the steel structure bridge assembly on the erected safety support by using the lifting equipment;
d. installing and constructing a steel structure bridge assembly hung on the safety support to complete construction of a new bridge section;
s8, integral construction
And repeating the steps from S6 to S7 to detach and install the multiple bridge sections, thereby completing the mounting and detaching construction of the whole bridge.
Preferably, the cutting weight of the beam plate is controlled within the lifting weight range of the bridge girder erection machine, so that potential safety hazards caused by eccentric weight are prevented.
Preferably, when the beam plate is cut, the part with serious beam section damage is firstly fixed by I-shaped steel at the damage position, and then cut off after being stabilized and reinforced, so that the cutting safety is ensured.
Preferably, the two sides correspond to balance when the beam slab is cut, synchronous cutting operation is carried out along the whole left-right direction, each beam slab is cut and then cut along the vertical direction, and the edges are hung when the beam slab is cut until the cutting work is finished.
Preferably, after the beam plate is cut for one section, other people are arranged to evacuate a certain distance from the site and then the beam plate is lifted.
Preferably, before hoisting, the hoisting equipment and the steel wire rope are strictly checked and controlled, the pre-load weight for realizing design calculation is checked, whether the bridge section to be hoisted is within the bearing weight of the hoisting equipment is detected and calculated, and the safety in the hoisting process is strictly ensured.
(III) advantageous effects
Compared with the prior art, the invention provides a bridge mounting and dismounting construction method with high safety, which has the following beneficial effects:
according to the bridge mounting and dismounting construction method with high safety, the number of various devices required in bridge mounting and dismounting construction is calculated according to design requirements and field conditions, and bridge erecting machines, beam lifting machines, beam transporting gun trucks, air compression crushing machines, cutting machines, electric welding machines and chain hoists in corresponding numbers are prepared; calculating the quantity of various pulling forces required in the bridge mounting and dismounting construction according to design requirements and field conditions, and arranging a cutting group, a drilling machine crushing group, a hoisting and loading beam group, a prefabricating group and a reinforcing steel bar group which correspond to the number of people; arranging various materials to enter a construction site, immediately arranging relevant personnel to carry out relevant detection and control on the required materials, supply places and quality after entering the site, and ensuring that subsequent construction can be stably carried out; erecting a temporary stabilizing support on the lower side of a concrete bridge section to be dismantled; all equipment required in the installation and disassembly construction is quickly moved to a specified station position for fixing after being assembled and debugged, and the continuous and stable operation of the subsequent construction is ensured; fixing the anti-collision wall of the concrete bridge section to be removed on the bridge floor by using a chain block for stabilizing, avoiding the problem of potential safety hazard caused by falling of a cutting section after cutting is finished, and then performing cutting work on the anti-collision wall; after the cutting of the anti-collision wall is finished, drilling at least four hoisting holes on each beam plate to be removed, and fixedly connecting the beam plates with a bridge girder erection machine through traction steel ropes, so that the whole section of beam plate is in a hoisting state and then performing cutting operation, and hoisting and loading are not performed until the whole cutting section is split; correspondingly connecting a lifting hook of the lifting equipment with a beam taking port reserved in the steel structure bridge assembly, and lifting the steel structure bridge assembly on the erected safety support by using the lifting equipment; the construction method has the advantages that the steel structure bridge assembly hoisted on the safety support is installed and built, the new bridge section is built, the bridge can be built in a segmented mode through the construction method, the safety of the bridge in the mounting and dismounting construction is greatly improved, the procedures are precise and orderly, and the construction safety of workers can be well guaranteed.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A bridge mounting and dismounting construction method with high safety comprises the following steps:
s1, preparation of engineering equipment
Calculating the quantity of various devices required in bridge mounting and dismounting construction according to design requirements and field conditions, and preparing bridge erecting machines, girder lifting machines, girder transporting gun trucks, air compression crushing machines, cutting machines, electric welding machines and chain hoists in corresponding quantity;
s2, arranging entry labor force
Calculating the quantity of various pulling forces required in the bridge mounting and dismounting construction according to design requirements and field conditions, and arranging a cutting group, a drilling machine crushing group, a hoisting and loading beam group, a prefabricating group and a reinforcing steel bar group which correspond to the number of people;
s3, entering a material field
Arranging various materials to enter a construction site, immediately arranging relevant personnel to carry out relevant detection and control on the required materials, supply places and quality after entering the site, and ensuring that subsequent construction can be stably carried out;
s4, erection of safety support
Erecting a temporary stabilizing support on the lower side of a concrete bridge section to be dismantled;
s5, equipment is in place
All equipment required in the installation and disassembly construction is quickly moved to a specified station position for fixing after being assembled and debugged, and the continuous and stable operation of the subsequent construction is ensured;
s6, dismantling construction of old bridge
a. Fixing the anti-collision wall of the concrete bridge section to be removed on the bridge floor by using a chain block for stabilizing, avoiding the problem of potential safety hazard caused by falling of a cutting section after cutting is finished, and then performing cutting work on the anti-collision wall;
b. after the cutting of the anti-collision wall is finished, drilling at least four hoisting holes on each beam plate to be removed, and fixedly connecting the beam plates with a bridge girder erection machine through traction steel ropes, so that the whole section of beam plate is in a hoisting state and then performing cutting operation, and hoisting and loading are not performed until the whole cutting section is split;
s7, assembling and building new bridge section
c. Correspondingly connecting a lifting hook of the lifting equipment with a beam taking port reserved in the steel structure bridge assembly, and lifting the steel structure bridge assembly on the erected safety support by using the lifting equipment;
d. installing and constructing a steel structure bridge assembly hung on the safety support to complete construction of a new bridge section;
s8, integral construction
And repeating the steps from S6 to S7 to detach and install the multiple bridge sections, thereby completing the mounting and detaching construction of the whole bridge.
The cutting weight of the beam plate is controlled within the lifting weight range of the bridge girder erection machine, so that potential safety hazards caused by eccentric weight are prevented.
When the beam plate is cut, the part with serious beam section damage firstly adopts the I-steel to fix the damaged part at the damaged position, and then the cutting-off work is carried out after the I-steel is stabilized and reinforced, so that the cutting safety is ensured.
The two sides correspond balanced going on during the beam slab cutting, carry out the cutting operation in step along whole left and right directions, cut along the vertical direction again after every beam slab all is cut to just hang the limit just in the cutting, until accomplishing cutting work.
After the beam slab is cut for one section, other personnel are arranged to evacuate a certain distance from the site and then the lifting work is carried out.
Before hoisting, the hoisting equipment and the steel wire rope are strictly checked and controlled, the pre-load weight for realizing design calculation is checked, whether the bridge section to be hoisted is within the bearing weight of the hoisting equipment is detected and calculated, and the safety in the hoisting process is strictly ensured.
In conclusion, according to the bridge assembling and disassembling construction method with high safety, the number of various types of equipment required in bridge assembling and disassembling construction is calculated according to design requirements and field conditions, and bridge erecting machines, beam lifting machines, beam transporting gun trucks, air compression crushing machines, cutting machines, electric welding machines and chain hoists in corresponding numbers are prepared; calculating the quantity of various pulling forces required in the bridge mounting and dismounting construction according to design requirements and field conditions, and arranging a cutting group, a drilling machine crushing group, a hoisting and loading beam group, a prefabricating group and a reinforcing steel bar group which correspond to the number of people; arranging various materials to enter a construction site, immediately arranging relevant personnel to carry out relevant detection and control on the required materials, supply places and quality after entering the site, and ensuring that subsequent construction can be stably carried out; erecting a temporary stabilizing support on the lower side of a concrete bridge section to be dismantled; all equipment required in the installation and disassembly construction is quickly moved to a specified station position for fixing after being assembled and debugged, and the continuous and stable operation of the subsequent construction is ensured; fixing the anti-collision wall of the concrete bridge section to be removed on the bridge floor by using a chain block for stabilizing, avoiding the problem of potential safety hazard caused by falling of a cutting section after cutting is finished, and then performing cutting work on the anti-collision wall; after the cutting of the anti-collision wall is finished, drilling at least four hoisting holes on each beam plate to be removed, and fixedly connecting the beam plates with a bridge girder erection machine through traction steel ropes, so that the whole section of beam plate is in a hoisting state and then performing cutting operation, and hoisting and loading are not performed until the whole cutting section is split; correspondingly connecting a lifting hook of the lifting equipment with a beam taking port reserved in the steel structure bridge assembly, and lifting the steel structure bridge assembly on the erected safety support by using the lifting equipment; the construction method has the advantages that the steel structure bridge assembly hoisted on the safety support is installed and built, the new bridge section is built, the bridge can be built in a segmented mode through the construction method, the safety of the bridge in the mounting and dismounting construction is greatly improved, the procedures are precise and orderly, and the construction safety of workers can be well guaranteed.
It is to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A bridge mounting and dismounting construction method with high safety is characterized in that: the method comprises the following steps:
s1, preparation of engineering equipment
Calculating the quantity of various devices required in bridge mounting and dismounting construction according to design requirements and field conditions, and preparing bridge erecting machines, girder lifting machines, girder transporting gun trucks, air compression crushing machines, cutting machines, electric welding machines and chain hoists in corresponding quantity;
s2, arranging entry labor force
Calculating the quantity of various pulling forces required in the bridge mounting and dismounting construction according to design requirements and field conditions, and arranging a cutting group, a drilling machine crushing group, a hoisting and loading beam group, a prefabricating group and a reinforcing steel bar group which correspond to the number of people;
s3, entering a material field
Arranging various materials to enter a construction site, immediately arranging relevant personnel to carry out relevant detection and control on the required materials, supply places and quality after entering the site, and ensuring that subsequent construction can be stably carried out;
s4, erection of safety support
Erecting a temporary stabilizing support on the lower side of a concrete bridge section to be dismantled;
s5, equipment is in place
All equipment required in the installation and disassembly construction is quickly moved to a specified station position for fixing after being assembled and debugged, and the continuous and stable operation of the subsequent construction is ensured;
s6, dismantling construction of old bridge
a. Fixing the anti-collision wall of the concrete bridge section to be removed on the bridge floor by using a chain block for stabilizing, avoiding the problem of potential safety hazard caused by falling of a cutting section after cutting is finished, and then performing cutting work on the anti-collision wall;
b. after the cutting of the anti-collision wall is finished, drilling at least four hoisting holes on each beam plate to be removed, and fixedly connecting the beam plates with a bridge girder erection machine through traction steel ropes, so that the whole section of beam plate is in a hoisting state and then performing cutting operation, and hoisting and loading are not performed until the whole cutting section is split;
s7, assembling and building new bridge section
c. Correspondingly connecting a lifting hook of the lifting equipment with a beam taking port reserved in the steel structure bridge assembly, and lifting the steel structure bridge assembly on the erected safety support by using the lifting equipment;
d. installing and constructing a steel structure bridge assembly hung on the safety support to complete construction of a new bridge section;
s8, integral construction
And repeating the steps from S6 to S7 to detach and install the multiple bridge sections, thereby completing the mounting and detaching construction of the whole bridge.
2. The bridge mounting and dismounting construction method with high safety according to claim 1, characterized in that: the cutting weight of the beam plate is controlled within the lifting weight range of the bridge girder erection machine, so that potential safety hazards caused by eccentric weight are prevented.
3. The bridge mounting and dismounting construction method with high safety according to claim 1, characterized in that: when the beam plate is cut, the part with serious beam section damage firstly adopts I-shaped steel to fix the damaged part at the damaged position, and then the cutting-off work is carried out after the I-shaped steel is stabilized and reinforced, so that the cutting safety is ensured.
4. The bridge mounting and dismounting construction method with high safety according to claim 1, characterized in that: the two sides correspond the balance and go on during the beam slab cutting, carry out the cutting operation in step along whole left and right directions, cut along the vertical direction again after every beam slab all is cut to just, hang the limit just in the cutting, until accomplishing cutting work.
5. The bridge mounting and dismounting construction method with high safety according to claim 1, characterized in that: after the beam slab is cut for one section, other people are arranged to evacuate a certain distance from the site and then the beam slab is lifted.
6. The bridge mounting and dismounting construction method with high safety according to claim 1, characterized in that: before hoisting, the hoisting equipment and the steel wire rope are strictly checked and controlled, the pre-load weight for realizing design calculation is checked, whether the bridge section to be hoisted is within the bearing weight of the hoisting equipment is detected and calculated, and the safety in the hoisting process is strictly ensured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010383474.4A CN111535190A (en) | 2020-05-08 | 2020-05-08 | Bridge mounting and dismounting construction method with high safety |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010383474.4A CN111535190A (en) | 2020-05-08 | 2020-05-08 | Bridge mounting and dismounting construction method with high safety |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111535190A true CN111535190A (en) | 2020-08-14 |
Family
ID=71979140
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010383474.4A Pending CN111535190A (en) | 2020-05-08 | 2020-05-08 | Bridge mounting and dismounting construction method with high safety |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111535190A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112727147A (en) * | 2020-12-23 | 2021-04-30 | 浙江省一建建设集团有限公司 | Outdoor suspended step dismantling method |
| CN114808773A (en) * | 2022-03-23 | 2022-07-29 | 广西北投交通养护科技集团有限公司 | Construction method for fast breaking and dismantling masonry arch bridge based on bridge floor cutting |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0325106A (en) * | 1989-06-21 | 1991-02-01 | Ishikawajima Harima Heavy Ind Co Ltd | Repairing method for simple girder system multi-span road bridge |
| CN104480868A (en) * | 2014-12-13 | 2015-04-01 | 中铁十九局集团第二工程有限公司 | Beam detaching method for road bridge overpassing operation railway |
| CN106149576A (en) * | 2016-08-17 | 2016-11-23 | 中铁二十局集团第三工程有限公司 | On across the whole assembling and dismantling of the most wired bridge except and construction method of installation |
| CN106638336A (en) * | 2016-10-21 | 2017-05-10 | 中国水利水电第八工程局有限公司 | Over-line continuous beam removing method and support for removing |
| CN209178849U (en) * | 2018-12-06 | 2019-07-30 | 佛山科学技术学院 | A kind of supporting support for bridging toughening |
| CN110792044A (en) * | 2019-08-22 | 2020-02-14 | 中铁十二局集团有限公司 | Construction method for quickly dismantling overpass |
-
2020
- 2020-05-08 CN CN202010383474.4A patent/CN111535190A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0325106A (en) * | 1989-06-21 | 1991-02-01 | Ishikawajima Harima Heavy Ind Co Ltd | Repairing method for simple girder system multi-span road bridge |
| CN104480868A (en) * | 2014-12-13 | 2015-04-01 | 中铁十九局集团第二工程有限公司 | Beam detaching method for road bridge overpassing operation railway |
| CN106149576A (en) * | 2016-08-17 | 2016-11-23 | 中铁二十局集团第三工程有限公司 | On across the whole assembling and dismantling of the most wired bridge except and construction method of installation |
| CN106638336A (en) * | 2016-10-21 | 2017-05-10 | 中国水利水电第八工程局有限公司 | Over-line continuous beam removing method and support for removing |
| CN209178849U (en) * | 2018-12-06 | 2019-07-30 | 佛山科学技术学院 | A kind of supporting support for bridging toughening |
| CN110792044A (en) * | 2019-08-22 | 2020-02-14 | 中铁十二局集团有限公司 | Construction method for quickly dismantling overpass |
Non-Patent Citations (4)
| Title |
|---|
| MUSCLEZHUANG: "《百度文库》", 29 September 2017 * |
| 于泽民: "金刚石绳锯机切割拆除工艺在沈铁高速公路改扩建项目中的应用", 《北方交通》 * |
| 于洪彬: "空心板梁公路桥梁拆除施工技术", 《道路桥梁》 * |
| 鲁晓明: "采用绳锯切割法拆除市政道路旧桥连续空心板梁体施工关键技术", 《采用绳锯切割法拆除市政道路旧桥连续空心板梁体施工关键技术》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112727147A (en) * | 2020-12-23 | 2021-04-30 | 浙江省一建建设集团有限公司 | Outdoor suspended step dismantling method |
| CN114808773A (en) * | 2022-03-23 | 2022-07-29 | 广西北投交通养护科技集团有限公司 | Construction method for fast breaking and dismantling masonry arch bridge based on bridge floor cutting |
| CN114808773B (en) * | 2022-03-23 | 2022-12-02 | 广西北投交通养护科技集团有限公司 | Construction method for fast breaking and dismantling masonry arch bridge based on bridge floor cutting |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103243663B (en) | Construction process for using bridge girder erection machine to remove T-shaped cantilever continuous rigid frame box girders | |
| CN102797226B (en) | Integral erection construction method of 60m steel box girder | |
| CN103291076A (en) | Multilayer steel truss fragmented reverse hoisting construction method in arc-shaped frame | |
| CN111535190A (en) | Bridge mounting and dismounting construction method with high safety | |
| CN112095482A (en) | Steel box girder bridge-spanning existing bridge hoisting construction method | |
| CN115492390B (en) | Construction process of support system of ultra-long overhanging corridor bailey frame | |
| CN209780193U (en) | Suspension type scaffold | |
| CN111979935A (en) | Dismantling construction method for bridge superstructure | |
| CN110700112A (en) | Movable formwork for concrete construction of overhanging wing plate of steel-concrete composite beam and construction method | |
| CN111519545A (en) | Pier and capping beam integrated construction platform and construction method thereof | |
| CN115538340A (en) | Rapid dismantling device and construction method for old bridge precast beam plate | |
| CN211420881U (en) | Movable formwork for concrete construction of overhanging wing plate of steel-concrete composite beam | |
| CN209742334U (en) | Steel construction vestibule bottom curtain construction platform | |
| CN114263114A (en) | Construction system and construction method of large-section steel box girder | |
| CN209244229U (en) | A kind of pin-connected panel suspention steel platform | |
| CN106522566A (en) | Roof steel truss slipping rail and dismounting and installing method thereof | |
| CN111155433A (en) | Method for dismantling movable formwork | |
| CN114458050B (en) | Cast house roof protective dismantling method | |
| CN218712226U (en) | Segment box girder prestress tensioning platform | |
| Harridge | Launching Gantries for Building Pre-cast Segmental Balanced Cantilever Bridges | |
| CN218114814U (en) | Device is demolishd fast to old bridge precast beam board | |
| CN111749456B (en) | Synchronous construction method for cantilever structure and tower body main body of lookout tower | |
| CN213740646U (en) | Bridge deck temporary support for mounting steel box girder | |
| CN113073558B (en) | Construction technology combining suspended bracket and overhanging anti-suspension construction | |
| CN215252368U (en) | A collapsible quick ann tears operation platform open for construction of precast beam diaphragm |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200814 |
|
| RJ01 | Rejection of invention patent application after publication |