CN103758141B - The balance splitting method of Double-Wall Steel Boxed Cofferdam - Google Patents
The balance splitting method of Double-Wall Steel Boxed Cofferdam Download PDFInfo
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- CN103758141B CN103758141B CN201310748236.9A CN201310748236A CN103758141B CN 103758141 B CN103758141 B CN 103758141B CN 201310748236 A CN201310748236 A CN 201310748236A CN 103758141 B CN103758141 B CN 103758141B
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- cofferdam
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- wall steel
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000000178 monomer Substances 0.000 claims description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000012806 monitoring device Methods 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 9
- 238000007667 floating Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Bridges Or Land Bridges (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The present invention provides the balance split technology of a kind of Double-Wall Steel Boxed Cofferdam, and described Double-Wall Steel Boxed Cofferdam is installed temporary connecting device and monitor for stress at split, monitored the safety separated of Double-Wall Steel Boxed Cofferdam by monitor for stress.The present invention needs not move through complicated calculations, and without considering the deployment scenarios of the interim preloading in cofferdam, efficiency is high；Conventional stress monitor method is used to realize, simple to operate；Monitored in real time by stress, can intuitively grasp whether be in poised state, What You See Is What You Get；Capital equipment is a set of stress monitor monitoring device, less investment.
Description
Technical field
The present invention relates to bridge construction engineering steel cofferdam installing area, particularly relate to the balance splitting method of a kind of Double-Wall Steel Boxed Cofferdam.
Background technology
Double-Wall Steel Boxed Cofferdam is water-retaining structure conventional in large-sized deep water foundation construction, can bear bigger hydraulic pressure, it is adaptable to the foundation construction under different geological conditions.When foundation construction, it both can be used as operation platform, has again and encloses water effect, may also participate in the stress of agent structure, has easily manufactured, construction rapidly, safe and reliable feature.
Conventional double-wall steel cofferdam construction typically uses entirety at bridge location to transfer installation method, but in old bridge reinforcement, owing to there is existing bridge pier in the range of engineering construction, cofferdam cannot integral installation at bridge location, need cofferdam first be divided into two parts in the plane, the most in place after abutting joint again.
Double-Wall Steel Boxed Cofferdam splitting method is typically cofferdam to be divided in the plane equal size two parts.The planar design that cofferdam is commonly used is circular or nose circle shape, has the most floating good balance before split.It is then semicircle after split or half nose circle shape (U-shaped) cofferdam (hereinafter referred to as cofferdam monomer).Because cofferdam monomer center of gravity is misaligned with centre of buoyancy, causing cofferdam monomer when split, moment may unstability lean forward or hypsokinesis suddenly, easily causes security incident.For preventing this phenomenon, should add water before split in the corresponding next door of cofferdam monomer regulation so that it is from floating balance.
Design because of the structure of Double-Wall Steel Boxed Cofferdam different parts and use sheet metal thickness possible different, different plus the residual amount of each separation after manufacture deviation, interim preloading and cofferdam watertight test, its line density is the most completely the same, and cannot accurately calculate regulating pondage before split.
Summary of the invention
Present invention is primarily targeted at provides a kind of and needs not move through complicated calculations, without the deployment scenarios considering the interim preloading in cofferdam, the balance splitting method that uses conventional stress monitor method i.e. to can determine whether to be in the Double-Wall Steel Boxed Cofferdam of poised state.
For reaching above-mentioned purpose, the present invention provides the balance splitting method of a kind of Double-Wall Steel Boxed Cofferdam, includes:
Step one, installs temporary connecting device and monitor for stress at the split of steel cofferdam；
Step 2, utilizes the monitor for stress in attachment means to judge whether to meet split condition, if monitor for stress video data is zero, then shows that cofferdam is in poised state, can be with split；
Step 3, as do not met split condition, then in the monomer of cofferdam, outside adds water and is adjusted, and repeats step 2.
Further, in step 2, when the video data of monitor for stress is zero, meet the split condition of Double-Wall Steel Boxed Cofferdam.
Further, in step 3, it is judged that the incongruent situation of split condition: one, there is compressive stress in the upper connecting connection parts between the monomer of cofferdam, the lower connecting connection parts between the monomer of cofferdam exists tension；Its two, there is tension in the upper connecting connection parts between the monomer of cofferdam, the lower connecting connection parts between the monomer of cofferdam exists compressive stress.
Further, there is compressive stress in the upper connecting connection parts between the monomer of cofferdam, when the lower connecting connection parts between the monomer of cofferdam exists tension, is adjusted by adding water in the outside of cofferdam monomer.
Further, there is tension in the upper connecting connection parts between the monomer of cofferdam, when the lower connecting connection parts between the monomer of cofferdam exists compressive stress, is adjusted by adding water in the inner side of cofferdam monomer.
Advantages of the present invention: for the dismounting of steel cofferdam, it is not necessary to through complicated calculations, and without considering the deployment scenarios of the interim preloading in cofferdam, efficiency is high；Conventional stress monitor method is used to realize, simple to operate；Monitored in real time by stress, can intuitively grasp whether be in poised state；Capital equipment is a set of stress monitor monitoring device, less investment, low cost.
Accompanying drawing explanation
Fig. 1 is cofferdam split horizontal layout schematic diagram.
Fig. 2 is that split facade in cofferdam arranges schematic diagram.
Fig. 3 is the partial enlarged drawing of Fig. 1.
Description of reference numerals, 1. cofferdam monomer, 2. attachment means, 3. monitor for stress.
Detailed description of the invention
The present invention provides the balance splitting method of a kind of Double-Wall Steel Boxed Cofferdam, utilizes the temporary connecting device 2 and monitor for stress 3 increased, can monitor its STRESS VARIATION in real time during cofferdam carries out split, and whether can judge intuitively adds water regulates is put in place.Determination methods is: if cofferdam monomer 1 is in unbalanced state, then its trend necessarily having backward or turning forward, and such attachment means 2 will necessarily tension or pressurized；If cofferdam monomer 1 is in balance or close to poised state, then the inevitable stress of attachment means 2 is the least, and monitor for stress 3 video data can be close to zero.Rely on the method, can will whether be in from floating poised state by separate cofferdam monomer 1 by intuitive judgment.
The technical scheme is that and be achieved in that:
First, before Double-Wall Steel Boxed Cofferdam split, top and bottom (more than the water surface being suitable for construction location) at cofferdam monomer 1 split are all welded to connect device 2, are made zero by the initial value of the monitor for stress 3 in attachment means 2, carry out preliminary split.
And in work progress real-time monitored monitor for stress 3 STRESS VARIATION situation.After above-mentioned steps completes, if attachment means 2 tension on top, cofferdam, attachment means 2 pressurized of bottom, then show that cofferdam monomer 1 has sweptback trend, can be by the regulation that adds water in the inner side of cofferdam monomer 1.Otherwise, then show that cofferdam monomer 1 has the trend turned forward, can be by the regulation that adds water in the outside of cofferdam monomer 1.During adding water, monitor for stress 3 shows STRESS VARIATION situation in real time, when stress level off to zero time, show that cofferdam monomer 1 is in self-balancing state, the most further according to technology, cofferdam required that split completes.
About the dismounting work of Double-Wall Steel Boxed Cofferdam, as a example by an embodiment:
Certain bridge maintenance and reinforcement uses nose circle shape both arms steel cofferdam, cofferdam length, width and height 38.6m, 14.6m and 15.3m respectively, uses Split construction method, and cofferdam need to be divided into two U-shapeds nose circle shape cofferdam before installing near bridge location.
Step one: Double-Wall Steel Boxed Cofferdam disintegrate before inside and outside cofferdam monomer 1 junction temporary connecting device 2 together with wallboard top and bottom (more than the water surface) respectively welding, after installation in attachment means 2 mount stress monitoring element 3 make initial value make zero.Attachment means 2 arranges 8 altogether, and cross section uses groove 14 shaped steel, single long 30cm.
Step 2: pull out cofferdam connecting pin real-time monitored stress monitoring element 3 STRESS VARIATION situation.
Step 3: pin finds that the attachment means 2 on top, cofferdam exists compressive stress after having pulled out, and lower connecting connection parts 2 exists tension, and there is the trend turned forward in single U-shaped cofferdam.Now add water outside single U cofferdam, simultaneously monitoring stress situation.Finding during adding water that attachment means 2 compressive stress on top is reducing, attachment means 2 tension of bottom is reducing.When add water to top and the bottom attachment means 2 stress level off to zero time, release temporary connecting device 2, separately after single U-shaped cofferdam from floating balance, cofferdam split success.
The above, only presently preferred embodiments of the present invention, it is not intended to limit protection scope of the present invention.
Claims (4)
1. the balance splitting method of a Double-Wall Steel Boxed Cofferdam, it is characterised in that include:
Step one, installs temporary connecting device and monitor for stress at the split of steel cofferdam；
Step 2, utilizes the monitor for stress in attachment means to judge whether to meet split condition, if monitor for stress video data is zero, then shows that cofferdam is in poised state, can be with split；
Step 3, as do not met split condition, then in the monomer of cofferdam, outside adds water and is adjusted, and repeats step 2.
In step 2, when the video data of monitor for stress is zero, meet the split condition of Double-Wall Steel Boxed Cofferdam.
The balance splitting method of Double-Wall Steel Boxed Cofferdam the most according to claim 1, it is characterized in that, in step 3, it is judged that the incongruent situation of split condition: one, there is compressive stress in the upper connecting connection parts between the monomer of cofferdam, the lower connecting connection parts between the monomer of cofferdam exists tension；Its two, there is tension in the upper connecting connection parts between the monomer of cofferdam, the lower connecting connection parts between the monomer of cofferdam exists compressive stress.
The balance splitting method of Double-Wall Steel Boxed Cofferdam the most according to claim 2, it is characterized in that, there is compressive stress in the upper connecting connection parts between the monomer of cofferdam, when the lower connecting connection parts between the monomer of cofferdam exists tension, is adjusted by adding water in the outside of cofferdam monomer.
The balance splitting method of Double-Wall Steel Boxed Cofferdam the most according to claim 2, it is characterized in that, there is tension in the upper connecting connection parts between the monomer of cofferdam, when the lower connecting connection parts between the monomer of cofferdam exists compressive stress, is adjusted by adding water in the inner side of cofferdam monomer.
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| CN201310748236.9A CN103758141B (en) | 2013-12-31 | 2013-12-31 | The balance splitting method of Double-Wall Steel Boxed Cofferdam |
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| CN201310748236.9A CN103758141B (en) | 2013-12-31 | 2013-12-31 | The balance splitting method of Double-Wall Steel Boxed Cofferdam |
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| CN103758141B true CN103758141B (en) | 2017-01-04 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106012846B (en) * | 2016-05-25 | 2017-09-12 | 中交二航局第三工程有限公司 | The double-walled steel jacket box and assembling method of splicing structure |
| CN109056508A (en) * | 2018-08-29 | 2018-12-21 | 中铁大桥局武汉桥梁特种技术有限公司 | The construction method of the bridge pier of basic protection against erosion, bridge and underwater foundation protection against erosion |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101225663A (en) * | 2008-01-31 | 2008-07-23 | 山东省路桥集团有限公司 | Steel boxed cofferdam and recovery method thereof |
| JP4528652B2 (en) * | 2005-03-08 | 2010-08-18 | Ｊｆｅエンジニアリング株式会社 | Temporary closing method for underwater structures and temporary closing structure |
| CN102094429A (en) * | 2011-01-12 | 2011-06-15 | 广东省长大公路工程有限公司 | Lowering control method of double-wall steel cofferdam |
| CN103015442A (en) * | 2013-01-15 | 2013-04-03 | 中铁大桥局股份有限公司 | Method for constructing split type cofferdam |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56125535A (en) * | 1980-03-06 | 1981-10-01 | Bridgestone Corp | Temporary cofferdam |
| JPH06220865A (en) * | 1993-01-27 | 1994-08-09 | Shimizu Corp | Double cofferdam process |
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- 2013-12-31 CN CN201310748236.9A patent/CN103758141B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4528652B2 (en) * | 2005-03-08 | 2010-08-18 | Ｊｆｅエンジニアリング株式会社 | Temporary closing method for underwater structures and temporary closing structure |
| CN101225663A (en) * | 2008-01-31 | 2008-07-23 | 山东省路桥集团有限公司 | Steel boxed cofferdam and recovery method thereof |
| CN102094429A (en) * | 2011-01-12 | 2011-06-15 | 广东省长大公路工程有限公司 | Lowering control method of double-wall steel cofferdam |
| CN103015442A (en) * | 2013-01-15 | 2013-04-03 | 中铁大桥局股份有限公司 | Method for constructing split type cofferdam |
Non-Patent Citations (2)
| Title |
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| "汉江大桥锁口式钢套箱围堰施工技术";刘松亮，苏建华，张学东;《公路交通科技_应用技术版》;20120515;第137-140页 * |
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