CN114922097B - Reinforcing transformation method for changing line shape of continuous girder bridge of existing steel box girder - Google Patents
Reinforcing transformation method for changing line shape of continuous girder bridge of existing steel box girder Download PDFInfo
- Publication number
- CN114922097B CN114922097B CN202210218963.3A CN202210218963A CN114922097B CN 114922097 B CN114922097 B CN 114922097B CN 202210218963 A CN202210218963 A CN 202210218963A CN 114922097 B CN114922097 B CN 114922097B
- Authority
- CN
- China
- Prior art keywords
- steel box
- box girder
- girder
- line shape
- bridge
- 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.)
- Active
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 81
- 239000010959 steel Substances 0.000 title claims abstract description 81
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 9
- 238000011426 transformation method Methods 0.000 title claims description 6
- 230000009466 transformation Effects 0.000 claims abstract description 32
- 238000002407 reforming Methods 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 8
- 238000003466 welding Methods 0.000 claims abstract description 8
- 238000012986 modification Methods 0.000 claims abstract description 6
- 230000004048 modification Effects 0.000 claims abstract description 6
- XEBWQGVWTUSTLN-UHFFFAOYSA-M phenylmercury acetate Chemical compound CC(=O)O[Hg]C1=CC=CC=C1 XEBWQGVWTUSTLN-UHFFFAOYSA-M 0.000 claims abstract description 4
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 6
- 230000002787 reinforcement Effects 0.000 claims description 6
- 238000013102 re-test Methods 0.000 claims description 3
- 238000004364 calculation method Methods 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 9
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000005728 strengthening Methods 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
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D1/00—Bridges in general
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
- E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/30—Metal
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention relates to a reinforcing and reforming method for changing the line shape of a continuous girder bridge of an existing steel box girder, which comprises the following specific steps: comparing the line shape of the original steel box girder with the line shape of the modified steel box girder, and marking a modification range on the original steel box girder; setting up an adjusting buttress at the lower part of the main girder of the original steel box girder within the marking range, wherein a jack is arranged on the adjusting buttress and is used for jacking the jack; cutting the original steel box girder outside the marking range; further lifting the jack; welding the processed connecting beam sections to the cut beams Duan Bufen one by one, and welding and connecting the connecting beam sections with the original steel box girder in the marked range to form a transformed steel box girder; reforming the buttress; and (3) a falling jack is used for enabling the transformed steel box girder to fall onto the support, so that linear transformation is completed. The invention changes the shape of the existing continuous girder bridge of the steel box girder with minimum cost on the basis of not dismantling the bridge structure, saves the construction cost of a new bridge, improves the utilization rate of an old bridge, accelerates the construction speed and reduces the influence on the existing traffic.
Description
Technical Field
The invention relates to the technical field of bridge reinforcement transformation and performance improvement construction, in particular to a reinforcement transformation method for changing the line shape of an existing steel box girder continuous girder bridge.
Background
In the currently known technology, the reinforcement and transformation of the bridge generally comprises reinforcement and reinforcement of the structure, bridge widening, replacement of the structure such as a beam section, a support or a guy cable and the like. However, when the structural alignment needs to be adjusted as the road plan changes, it is not only the beam sections that are to be adapted to the new alignment, but also the changes in the elevation or form of the underlying structure. The solution to this problem is often to disassemble the old bridge and build a new bridge in place. But the newly built bridge has high cost and long construction time, and can cause great influence on relatively mature traffic lines in urban environment.
Disclosure of Invention
The invention aims to solve the defects of the prior art and provides a reinforcing and reforming method for changing the line shape of a continuous girder bridge of an existing steel box girder.
The invention adopts the following technical scheme to realize the aim:
a strengthening and reforming method for changing the line shape of a continuous girder bridge of an existing steel box girder comprises the following specific steps:
s1, calculating and planning
Measuring the line shape of the original steel box girder and the line shape of the transformed steel box girder, and accurately calculating a girder Duan Gaocheng on a drawing;
s2, marking the transformation range
Comparing the line shape of the original steel box girder with the line shape of the modified steel box girder, and marking the modification range on the original steel box girder;
s3, mounting and adjusting buttress
Setting up an adjusting buttress at the lower part of the original steel box girder in the marked transformation range, and arranging a jack on the adjusting buttress to tightly jack the jack on the adjusting buttress with the bottom of the original steel box girder in the marked range;
s4, load transfer
Synchronously jacking the jack, and transferring the load of the girder of the original steel box girder to the jack from the support on the pier;
s5, cutting
Cutting the original steel box girder outside the marked transformation range;
s6, continuously jacking
Further lifting the jack, and lifting the original steel box girder main girder in the marking range to be higher than the elevation of the transformed steel box girder main girder;
s7, welding transformation
Welding the processed connecting beam sections to the cut beams Duan Bufen one by one, and welding and connecting the connecting beam sections with the original steel box girder in the marked transformation range to form a transformed steel box girder;
s8, reforming bridge pier
Removing a support on the pier, chiseling out concrete at the upper part of the pier, exposing the reinforcing steel bars, lengthening the reinforcing steel bars, supporting a template, pouring a heightening pier, and mounting the support on the heightening pier;
s9, finishing transformation
And (3) a falling jack is used for enabling the transformed steel box girder to fall onto the support, so that the linear transformation of the steel box girder bridge structure is completed.
In step S1, after the beam Duan Gaocheng is calculated in step S1, the portion of the fluctuation range outside the acceptable range is modified, and the portion not exceeding the acceptable range is not modified.
In the step S2, the line shape of the original steel box girder in the marked transformation range is similar to that of the transformed steel box girder in the corresponding position.
In step S3, a supporting frame is arranged at the bottom of the jack for adjusting the buttress.
And S9, after the transformation is completed, measuring the line shape of the transformed steel box girder main girder, and carrying out accurate retest on a drawing to determine whether the design requirement is met.
The top of the jack is additionally provided with a protection pad.
The beneficial effects of the invention are as follows: the invention changes the shape of the existing continuous girder bridge of the steel box girder with minimum cost on the basis of not dismantling the bridge structure, saves the construction cost of a new bridge, improves the utilization rate of an old bridge, accelerates the construction speed and reduces the influence on the existing traffic.
Drawings
FIG. 1 is a schematic diagram showing a linear comparison of the bridge before and after transformation in the present invention;
FIG. 2 is a schematic diagram of the installation and arrangement of the adjusting buttresses under the main beams of the original steel box girders in the invention;
FIG. 3 is a schematic illustration of the welding operation of the connecting beam segments of the present invention;
FIG. 4 is a schematic view of the construction of the raised pier of the present invention;
FIG. 5 is a schematic view of the structure of the adjusting buttress of the present invention.
In the figure: 1-a primary steel box girder main girder; 2-pier; 21-a support; 22-heightening piers; 3, a main girder of the steel box girder after transformation; 4-adjusting the buttress; 41-supporting frames; 42-jack;
the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Detailed Description
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
as shown in fig. 1 to 5, the method for reinforcing and reforming the existing steel box girder continuous girder bridge line shape comprises the following specific steps:
s1, calculating and planning
Measuring the line shape of the original steel box girder 1 and the line shape of the modified steel box girder 3, and accurately calculating a girder Duan Gaocheng on a drawing;
s2, marking the transformation range
Comparing the line shape of the original steel box girder 1 with the line shape of the modified steel box girder 3, and marking the modification range on the original steel box girder 1;
s3, installing and adjusting buttress 4
Setting up an adjusting buttress 4 at the lower part of the original steel box girder 1 in the marked transformation range, arranging a jack 42 on the adjusting buttress 4, and tightly jacking the jack 42 on the adjusting buttress 4 with the girder bottom of the original steel box girder 1 in the marked range;
s4, load transfer
Synchronously lifting the jack 42, and transferring the load of the girder 1 of the original steel box girder to the jack 42 from the support 21 on the bridge pier 2;
s5, cutting
Cutting the original steel box girder 1 outside the marked transformation range;
s6, continuously jacking
Further lifting the jack 42 to lift the original steel box girder 1 within the marking range to be higher than the elevation of the transformed steel box girder 3;
s7, welding transformation
The processed connecting beam sections 11 are welded to the cut beams Duan Bufen one by one and are welded and connected with the original steel box girder 1 in the marked transformation range to form a transformed steel box girder 3;
s8, reforming bridge pier 2
Removing the support 21 on the bridge pier 2, chiseling the concrete on the upper part of the bridge pier 2, exposing the reinforcing steel bars, lengthening the reinforcing steel bars, supporting a template, pouring the heightening pier 22, and installing the support 21 on the heightening pier 22;
s9, finishing transformation
And the jack 42 falls back to enable the transformed steel box girder main girder 3 to fall onto the support 21, so that the linear transformation of the steel box girder bridge structure is completed.
In step S1, after the beam Duan Gaocheng is calculated in step S1, the portion of the fluctuation range outside the acceptable range is modified, and the portion not exceeding the acceptable range is not modified.
In the step S2, the line shape of the original steel box girder 1 in the marked transformation range is similar to that of the transformed steel box girder 3 at the corresponding position.
In step S3, a supporting frame 41 is provided at the bottom of the jack 42 for adjusting the abutment 4.
And S9, after the transformation is completed, measuring the line shape of the transformed steel box girder 3, and carrying out accurate retest on a drawing to determine whether the design requirement is met.
A protective pad is added to the top of the jack 42.
The invention changes the shape of the existing continuous girder bridge of the steel box girder with minimum cost on the basis of not dismantling the bridge structure, saves the construction cost of a new bridge, improves the utilization rate of an old bridge, accelerates the construction speed and reduces the influence on the existing traffic.
While the invention has been described above with reference to the accompanying drawings, it will be apparent that the invention is not limited to the above embodiments, but is intended to cover various modifications, either made by the method concepts and technical solutions of the invention, or applied directly to other applications without modification, within the scope of the invention.
Claims (6)
1. A reinforcement transformation method for changing the line shape of a continuous girder bridge of an existing steel box girder is characterized by comprising the following specific steps:
s1, calculating and planning
Measuring the line shape of the original steel box girder (1) and the line shape of the transformed steel box girder (3), and accurately calculating a girder Duan Gaocheng on a drawing;
s2, marking the transformation range
Comparing the line shape of the original steel box girder (1) with the line shape of the modified steel box girder (3), and marking the modification range on the original steel box girder (1);
s3, mounting and adjusting buttress (4)
Setting up an adjusting buttress (4) at the lower part of the original steel box girder (1) in the marked transformation range, arranging a jack (42) on the adjusting buttress (4), and tightly jacking the jack (42) on the adjusting buttress (4) with the girder bottom of the original steel box girder (1) in the marked range;
s4, load transfer
The jack (42) is synchronously jacked, and the load of the original steel box girder (1) is completely transferred to the jack (42) from the support (21) on the bridge pier (2);
s5, cutting
Cutting the original steel box girder (1) outside the marked transformation range;
s6, continuously jacking
Further lifting the jack (42), and lifting the original steel box girder (1) within the marking range to be higher than the elevation of the transformed steel box girder (3);
s7, welding transformation
The processed connecting beam sections (11) are welded to the cut beams Duan Bufen one by one and are welded and connected with the original steel box girder (1) in the marked transformation range to form a transformed steel box girder (3);
s8, reforming pier (2)
Removing a support (21) on the bridge pier (2), chiseling out concrete on the upper part of the bridge pier (2), exposing the reinforcing steel bars, lengthening the reinforcing steel bars, supporting a template, pouring a heightening pier (22), and installing the support (21) on the heightening pier (22);
s9, finishing transformation
And the falling jack (42) enables the transformed steel box girder main girder (3) to fall onto the support (21) to finish the linear transformation of the steel box girder bridge structure.
2. The method for reinforcing and modifying a continuous beam bridge line shape for an existing steel box girder according to claim 1, wherein in step S1, after the calculation of the girder Duan Gaocheng, the portion of the change range outside the acceptable range is modified, and the portion not exceeding the acceptable range is not modified.
3. The reinforcing transformation method for changing the line shape of the continuous girder bridge of the existing steel box girder according to claim 1, wherein in the step S2, the line shape of the original steel box girder (1) within the marked transformation range is similar to the line shape of the transformed steel box girder (3) at the corresponding position.
4. A method for modifying the line shape of a continuous girder bridge of an existing steel box girder according to claim 3, wherein in step S3, a supporting frame (41) is provided at the bottom of a jack (42) for adjusting the buttress (4).
5. The reinforcing transformation method for changing the line shape of the continuous girder bridge of the existing steel box girder according to claim 4, wherein after the transformation in the step S9 is completed, the line shape of the transformed steel box girder (3) is measured, and the retest of the accuracy is carried out on a drawing to determine whether the design requirement is met.
6. The method for reinforcing and reforming an existing steel box girder continuous girder bridge line according to claim 5, wherein a protection pad is additionally installed on the top of the jack (42).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210218963.3A CN114922097B (en) | 2022-03-08 | 2022-03-08 | Reinforcing transformation method for changing line shape of continuous girder bridge of existing steel box girder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210218963.3A CN114922097B (en) | 2022-03-08 | 2022-03-08 | Reinforcing transformation method for changing line shape of continuous girder bridge of existing steel box girder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114922097A CN114922097A (en) | 2022-08-19 |
| CN114922097B true CN114922097B (en) | 2024-02-13 |
Family
ID=82805592
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210218963.3A Active CN114922097B (en) | 2022-03-08 | 2022-03-08 | Reinforcing transformation method for changing line shape of continuous girder bridge of existing steel box girder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114922097B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003034911A (en) * | 2001-07-25 | 2003-02-07 | Taisei Corp | Replacing method for bridge girder |
| CN103981816A (en) * | 2014-04-15 | 2014-08-13 | 河南省公路工程局集团有限公司 | Construction method for underpinning of overpass framework pier columns |
| CN105568866A (en) * | 2015-12-31 | 2016-05-11 | 中铁二十局集团第六工程有限公司 | Incremental launching construction method for large-span steel box girder spanning constructed road |
| CN206986701U (en) * | 2017-07-28 | 2018-02-09 | 山西省交通科学研究院 | A kind of steel box girder bridge Program for structural Transformation system |
| CN107988924A (en) * | 2017-12-11 | 2018-05-04 | 兰州理工大学 | A kind of steel based on re-building of old bridge-mixed composite beam bridge system transform system and conversion method |
-
2022
- 2022-03-08 CN CN202210218963.3A patent/CN114922097B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003034911A (en) * | 2001-07-25 | 2003-02-07 | Taisei Corp | Replacing method for bridge girder |
| CN103981816A (en) * | 2014-04-15 | 2014-08-13 | 河南省公路工程局集团有限公司 | Construction method for underpinning of overpass framework pier columns |
| CN105568866A (en) * | 2015-12-31 | 2016-05-11 | 中铁二十局集团第六工程有限公司 | Incremental launching construction method for large-span steel box girder spanning constructed road |
| CN206986701U (en) * | 2017-07-28 | 2018-02-09 | 山西省交通科学研究院 | A kind of steel box girder bridge Program for structural Transformation system |
| CN107988924A (en) * | 2017-12-11 | 2018-05-04 | 兰州理工大学 | A kind of steel based on re-building of old bridge-mixed composite beam bridge system transform system and conversion method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114922097A (en) | 2022-08-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103255726B (en) | A kind of construction method of continuous beam arch combination bridge | |
| CN104674945A (en) | Tree-shaped steel pipe column structure and construction method thereof | |
| CN101781878A (en) | Integral lifting template of main pylon of single-pylon cable-stayed bridge without dorsal cables and lifting construction method thereof | |
| CN107806019A (en) | Large-span suspension bridge gate Sarasota construction method | |
| CN112227232B (en) | Pier upright post underpinning method of pier-beam consolidation continuous beam bridge | |
| CN107336346A (en) | A kind of beam making bench | |
| CN113622316A (en) | Steel truss girder multipoint traction type pushing construction system and construction method thereof | |
| CN115075398A (en) | Reverse-order socket construction method for installing Y-shaped steel column | |
| CN110158470B (en) | Method for constructing continuous highway beam by longitudinally and transversely moving movable formwork in complex environment | |
| CN113373817A (en) | Precise adjusting construction method and device for wedge-shaped blocks of longitudinal and transverse slopes of precast beam | |
| CN114922097B (en) | Reinforcing transformation method for changing line shape of continuous girder bridge of existing steel box girder | |
| CN108708292A (en) | A kind of I-shaped steel reinforced concrete combination beam concrete folding constructing device and construction method | |
| CN205116025U (en) | Hanger device is pour to self -balancing concrete case roof beam and T beam bridge cantilever edge of a wing secondary | |
| CN113403968B (en) | Bridge pier underpinning method and underpinning structure | |
| CN107881914B (en) | Wire-dividing tube type cable saddle back field assembly type positioning device and assembly method | |
| CN105297643A (en) | Method for replacing support of hollow slab type bridge | |
| CN201588172U (en) | Integral single-tower non-dorsal-cord cable-stayed-bridge king tower lifting template | |
| CN115323918A (en) | Large-section steel box girder support installation pre-deviation adjusting and calculating method | |
| CN206982971U (en) | A kind of beam making bench | |
| CN203878479U (en) | Bridge erection machine traversing support | |
| CN208777175U (en) | A kind of overlapping constructing device of I-shaped steel reinforced concrete combination beam concrete | |
| CN112482193A (en) | Method for applying compressive stress to concrete slab in hogging moment area of combination beam, main beam and cable-stayed bridge | |
| CN220561834U (en) | Integral hoisting of T-beam steel rib frame mould | |
| CN218932878U (en) | Temporary storage supporting pad device for variable span beam of mobile bridge girder erection machine | |
| KR102161168B1 (en) | Height-adjustable combined multi-transporter for bridge construction and bridge construction method using it |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |