CN109505247A - Self-anchored suspension bridge closure segment construction technology - Google Patents
Self-anchored suspension bridge closure segment construction technology Download PDFInfo
- Publication number
- CN109505247A CN109505247A CN201811402619.XA CN201811402619A CN109505247A CN 109505247 A CN109505247 A CN 109505247A CN 201811402619 A CN201811402619 A CN 201811402619A CN 109505247 A CN109505247 A CN 109505247A
- Authority
- CN
- China
- Prior art keywords
- closure segment
- anchor span
- pours
- bridge
- span section
- 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
- 238000010276 construction Methods 0.000 title claims abstract description 21
- 238000005516 engineering process Methods 0.000 title claims abstract description 17
- 239000000725 suspension Substances 0.000 title claims abstract description 15
- 238000005266 casting Methods 0.000 claims abstract description 19
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 40
- 229910000831 Steel Inorganic materials 0.000 claims description 29
- 239000010959 steel Substances 0.000 claims description 29
- 229910052742 iron Inorganic materials 0.000 claims description 20
- 238000003466 welding Methods 0.000 claims description 7
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 3
- 239000001569 carbon dioxide Substances 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 abstract description 2
- 238000007689 inspection Methods 0.000 abstract 1
- 238000005259 measurement Methods 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000009491 slugging Methods 0.000 description 1
- 230000007704 transition Effects 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
- 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
- E01D11/00—Suspension or cable-stayed bridges
- E01D11/02—Suspension bridges
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
Self-anchored suspension bridge closure segment construction technology of the present invention includes the following steps: (1) preparation of construction, first carries out bracket and sets up, and pre-pressing bracket, bed die is laid with, reinforcing bar binding；(2) bed course pours；In anchor block bottom casting concrete bed course；Anchor block bottom cushion is poured to anchor block bottom absolute altitude and is flushed, bed course range is the every side extension 30cm of anchor block projected area；(3) concrete pours by several times；(4) closure segment pours；Anchor span respectively has one in bridge two sides, and there are two toughened internal stress altogether, is first poured to the anchor span of bridge side, is poured in three times in two times in the anchor span to the bridge other side, and last time reserves 3m, carries out closure segment and pours；(5) cable guide pipe is installed；(6) prestressed stretch-draw inspection is finally carried out.Construction technology of the present invention is simple, shortens the construction period, cost is greatly saved.
Description
Technical field
The present invention relates to suspension bridge construction techniques, and in particular to self-anchored suspension bridge closure segment construction technology.
Background technique
Suspension bridge also known as suspension bridge are referred to so that the cable at two sides (or bridge both ends) (or steel is hung and be anchored in by Sarasota
Chain) bridge as the main supporting member of superstructure.Its cable geometry is determined by the equilibrium condition of power, normally close to throwing
Object line；It hangs down many sunpenders from cable, bridge floor is hung, set up between bridge floor and sunpender and set stiff girder, with cable formation group
Zoarium system, to reduce deflection deformation caused by load.
Self-anchored suspension bridge is not required to build bulky anchorage, low to geological conditions requirement, and span setting is flexible, and scape
It is good to see effect, using more and more；To provide powerful vertical force component, and saving construction cost to main push-towing rope, self-anchored suspension bridge
Girder mostly uses greatly hybrid beam form, i.e. end bay and anchor span uses beams of concrete, and main span uses steel box-girder, beams of concrete and steel case
Adapter section transition is mixed using steel-between beam.
Steel box-girder elongation can change with temperature change, while the contraction of newly-laid concrete early stage, the factors such as creep,
It will be deformed in the structure, cause internal force, so reasonable measure must be taken, it is ensured that close up section concrete not because of itself
Length variation with steel box-girder is caused to crack and be crushed, and closes up bridge smoothly.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of construction technologies simply, shortens the construction period, greatlys save
The self-anchored suspension bridge closure segment construction technology of cost.
In order to achieve the above objectives, technical scheme is as follows:
Self-anchored suspension bridge closure segment construction technology, the construction technology include the following steps:
(1) closure segment pours；Including the casting of left and right anchor span section and the casting of middle part closure segment, the two sides anchor span Duan Qiao respectively have one,
There are two toughened internal stress altogether, are first poured to the anchor span section of bridge side in two times, are divided to two in the anchor span section to the bridge other side
3m is finally reserved in secondary casting, and progress middle part closure segment, which pours, links together left and right anchor span section；
(2) it pours sequence specifically as the bottom slab concreting of 1. left anchor span section, while carrying out installation lower part built-in fitting；2. left anchor span section
Web and top plate pour, while carrying out installation top built-in fitting；3. the bottom slab concreting of right anchor span section；4. the web of right anchor span section and
Top plate pours；5. middle part closure segment casting, two H700 fashioned iron of placement symmetrical above and below when casting, the both ends of H700 fashioned iron respectively with
Steel box-girder and built-in fitting welding in left and right anchor span section.
In one embodiment of the invention, it is protected between H700 fashioned iron and steel box-girder and built-in fitting using carbon dioxide gas
Shield Welding is welded.
In one embodiment of the invention, sensor is set on the closure segment of middle part.
Through the above technical solutions, the beneficial effects of the present invention are:
The present invention can prevent steel box-girder from being extended by temperature change by setting built-in fitting and H700 fashioned iron, and prevent concrete
Deformation caused by the temperature stress of itself influences toughened internal stress and closes up.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is anchor span pouring order of concrete structure chart in bridge side of the present invention；
Fig. 2 is anchor span pouring order of concrete structure chart in the bridge other side of the present invention；
Fig. 3 is H700 fashioned iron layout drawing of the present invention；
Fig. 4 is closure segment H700 of the present invention overlap joint figure；
Number and corresponding component title represented by letter in figure:
10, middle part closure segment 20, steel box-girder 30, H700 fashioned iron 40, built-in fitting.
Specific embodiment
In order to be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, tie below
Conjunction is specifically illustrating, and the present invention is further explained.
Referring to figure 1 and figure 2, the invention discloses self-anchored suspension bridge closure segment construction technology, the construction technologies
Include the following steps:
(1) closure segment pours；Including the casting of left and right anchor span section and the casting of middle part closure segment, the two sides anchor span Duan Qiao respectively have one,
There are two toughened internal stress altogether, are first poured to the anchor span section of bridge side in two times, are divided to two in the anchor span section to the bridge other side
3m is finally reserved in secondary casting, and progress middle part closure segment, which pours, links together left and right anchor span section；
(2) it pours sequence specifically as the bottom slab concreting of 1. left anchor span section, while carrying out installation lower part built-in fitting (toughened internal stress guarantor
It stays)；2. the web and top plate of left anchor span section pour, while carrying out installation top built-in fitting；3. bottom slab concreting (the steel of right anchor span section
Concrete adapter section retains)；4. the web and top plate of right anchor span section pour and (retain steel concrete adapter section)；5. middle part closure segment casting, is poured
Two H700 fashioned iron of placement symmetrical above and below when note, the both ends of H700 fashioned iron respectively with steel box-girder in left and right anchor span section and pre-
Slugging.
It is welded between H700 fashioned iron and steel box-girder and built-in fitting of the present invention using carbon dioxide gas arc welding technique,
Improve weld strength, when welding is welded using two guarantor's weldering modes, guarantees that weld seam meets code requirement.
Sensor is arranged on the concrete on H700 fashioned iron after the closure segment casting complete of middle part in the present invention, passes through biography
Sensor observation is deformed because steel box-girder expands with heat and contract with cold generates stress variation to H700 fashioned iron, guarantees the steady of weld seam and H700 fashioned iron
Gu.
The invention also includes measure steel box-girder elongation:
It is measured using overall length of the TS60 total station to steel box-girder under different temperatures, measurement data is shown in Table 4.1-1 not equality of temperature
Spend lower steel box-girder and extend scale, monitoring data show: from 13 DEG C to 27 DEG C, steel box-girder has extended 100mm.It can by data analysis
Know: the elongation of steel box-girder and the variation exponentially curvilinear motion of temperature, the following Fig. 4 temperature of change curve-elongation variation are bent
Line.
According to measurement data as a result, carrying out curve fitting in conjunction with table 2, its equation is obtained are as follows:
y = 6.6912e0.108x
In formula:
Y --- steel box-girder elongation (mm)；
X --- temperature (DEG C);
| Temperature/DEG C | 13 | 14 | 16 | 17 | 18 | 19 | 20 | 22 | 23 | 24 | 26 | 27 |
| Elongation/mm | 24 | 31 | 43 | 50 | 43 | 47 | 58 | 63 | 84 | 100 | 105 | 124 |
Steel box-girder extends scale under 2 different temperatures of table
It pours a few days ago in toughened internal stress closure segment by reinforcing being observed bridge elevation, axis and bridge length, observes gas
Warm changing rule finds out one day temperature minimum time and temperature more constant time, so as to temperature is lower and temperature
Casting concrete when constant is calculated the shrinkage generated under steel box-girder day and night temperature using fitting formula, and calculated
Internal stress is combined together using corresponding anchor measure and concrete box girder, and toughened internal stress is avoided not generate drawing crack seam.
Join the inspiration that the present invention is arranged according to the stiff skeleton of cradle construction closure segment, according to anchor as shown in figure 3 and figure 4
Across the own structural characteristics with steel box-girder, stiff skeleton (H700 fashioned iron) is set in toughened internal stress closure segment, prevents steel box-girder
Deformation caused by by temperature change variable elongation and the temperature stress of concrete itself is influenced toughened internal stress and is closed up.
H700 fashioned iron is set between steel box-girder and casting concrete and carries out anchoring temporarily, H700 fashioned iron is adopted with steel box-girder
It is overlapped with welding manner, lap of splice 800mm；Shift to an earlier date pre-embedded steel slab in H700 fashioned iron and first casting concrete to be connected
It connects, lap of splice 800mm, after concreting is completed and reaches intensity, H700 fashioned iron is removed.
The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (3)
1. self-anchored suspension bridge closure segment construction technology, which is characterized in that the construction technology includes the following steps:
(1) closure segment pours；Including the casting of left and right anchor span section and the casting of middle part closure segment, the two sides anchor span Duan Qiao respectively have one,
There are two toughened internal stress altogether, are first poured to the anchor span section of bridge side in two times, are divided to two in the anchor span section to the bridge other side
3m is finally reserved in secondary casting, and progress middle part closure segment, which pours, links together left and right anchor span section；
(2) it pours sequence specifically as the bottom slab concreting of 1. left anchor span section, while carrying out installation lower part built-in fitting；2. left anchor span section
Web and top plate pour, while carrying out installation top built-in fitting；3. the bottom slab concreting of right anchor span section；4. the web of right anchor span section and
Top plate pours；5. middle part closure segment casting, two H700 fashioned iron of placement symmetrical above and below when casting, the both ends of H700 fashioned iron respectively with
Steel box-girder and built-in fitting welding in left and right anchor span section.
2. self-anchored suspension bridge closure segment construction technology according to claim 1, which is characterized in that H700 fashioned iron and steel case
It is welded between beam and built-in fitting using carbon dioxide gas arc welding technique.
3. self-anchored suspension bridge closure segment construction technology according to claim 1, which is characterized in that set on the closure segment of middle part
Set sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811402619.XA CN109505247A (en) | 2018-11-23 | 2018-11-23 | Self-anchored suspension bridge closure segment construction technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811402619.XA CN109505247A (en) | 2018-11-23 | 2018-11-23 | Self-anchored suspension bridge closure segment construction technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109505247A true CN109505247A (en) | 2019-03-22 |
Family
ID=65749595
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811402619.XA Pending CN109505247A (en) | 2018-11-23 | 2018-11-23 | Self-anchored suspension bridge closure segment construction technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109505247A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113481819A (en) * | 2021-07-16 | 2021-10-08 | 黄河勘测规划设计研究院有限公司 | Self-anchored suspension bridge steel-concrete combined section and construction method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2534948A1 (en) * | 1982-10-22 | 1984-04-27 | Arnodin Sa Ets | Method for replacing a layer of suspension cables of a suspension bridge allowing the bridge to remain in service throughout the operation |
| CN201296900Y (en) * | 2008-08-20 | 2009-08-26 | 北京锦泰安联桥梁钢构技术有限公司 | Temporary locking device for combined box beam seaming section of corrugated steel web plate |
| CN104264592A (en) * | 2014-10-14 | 2015-01-07 | 中国水利水电第四工程局有限公司 | Construction method of continuous beam |
-
2018
- 2018-11-23 CN CN201811402619.XA patent/CN109505247A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2534948A1 (en) * | 1982-10-22 | 1984-04-27 | Arnodin Sa Ets | Method for replacing a layer of suspension cables of a suspension bridge allowing the bridge to remain in service throughout the operation |
| CN201296900Y (en) * | 2008-08-20 | 2009-08-26 | 北京锦泰安联桥梁钢构技术有限公司 | Temporary locking device for combined box beam seaming section of corrugated steel web plate |
| CN104264592A (en) * | 2014-10-14 | 2015-01-07 | 中国水利水电第四工程局有限公司 | Construction method of continuous beam |
Non-Patent Citations (6)
| Title |
|---|
| 华锡生等: "《精密工程测量技术及应用》", 31 August 2002, 河海大学出版社 * |
| 庞小兵等: ""松原市天河大桥北汊主桥钢－混结合段施工技术"", 《世界桥梁》 * |
| 李长伟: "连续刚构桥合龙段专项施工方案", 《HTTPS://WENKU.BAIDU.COM/VIEW/84B84A034028915F814DC241.HTML》 * |
| 杨红霞: "《商品混凝土质量与成本控制技术》", 30 June 2014, 中国建材工业出版社 * |
| 邱彦龙等: "《二氧化碳气体保护焊技术快速入门（第二版）》", 31 March 2015, 上海科学技术出版社 * |
| 铁道部西南交通大学铁路桥梁专业《铁路钢桥》编写组: "《铁路钢桥》", 30 September 1978, 人民铁道出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113481819A (en) * | 2021-07-16 | 2021-10-08 | 黄河勘测规划设计研究院有限公司 | Self-anchored suspension bridge steel-concrete combined section and construction method thereof |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190322 |
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| RJ01 | Rejection of invention patent application after publication |