CN104213571A - Underwater closed cofferdam structure - Google Patents
Underwater closed cofferdam structure Download PDFInfo
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- CN104213571A CN104213571A CN201410342564.3A CN201410342564A CN104213571A CN 104213571 A CN104213571 A CN 104213571A CN 201410342564 A CN201410342564 A CN 201410342564A CN 104213571 A CN104213571 A CN 104213571A
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- coaming plate
- cofferdam
- underwater structure
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Abstract
The invention provides an underwater closed cofferdam structure, wherein segmented-type enclosing plates are arranged at the outer-side positions of an underwater structure, the enclosing plates are sequentially connected with the outer lateral surface of the underwater structure through water seal, and the enclosing plates are superposed along a height direction and are mutually connected through water seal; a water liquid at the inner part of the underwater structure is pumped out, so as to form a negative pressure at the inner part of the underwater structure, and the enclosing plates cling to the outer lateral surface of the underwater structure under the action of the negative pressure. According to the underwater closed cofferdam structure, because foundation treatment is not needed, and the enclosing plates do not need to be exposed out of a water surface, the height of the cofferdam can be minimized, and materials and the construction cost are furthest saved. In addition, the cofferdam disclosed by the invention is mainly fixed by utilizing a water pressure, so that not only is a water-sealed structure more reliable and easy to disassemble, but also other destructions for the underwater structure and a foundation of the underwater structure cannot be formed, and the underwater structure can be protected in the construction process.
Description
Technical field
The present invention relates to one and close cofferdam structure under water, particularly a kind of profundal zone floating merogenesis steel-slag sand type closes cofferdam structure under water.
Background technology
Cofferdam refers in hydraulic engineering construction, for building the provisional space enclosing structure that permanent water conservancy projects is built, its effect be prevent water and soil from entering underwater structure build position, so that carry out dry groove construction in cofferdam.Cofferdam is generally mainly used in hydraulic architecture, and except the part of minority cofferdam as formal underwater structure, most of cofferdam needs to remove after being finished.In cofferdam construction, profundal zone (depth of water is greater than 10 meters) cofferdam construction is difficult point wherein.
Along with the development of science and technology and the continuous accumulation of construction experience, the construction technology of profundal zone underwater cofferdam also at development, the forms such as the most frequently used has steel sheet-pile cofferdam, both arms steel cofferdam.
Steel sheet pile is the most frequently used a kind of sheet pile cofferdam, has full range of sizes and interlocking form.Its advantage is: intensity is high, easily squeezes into hard soil layer; Can at dark subaqueous work, water resistance is good; The cofferdam of various profile can be formed on demand, and can repeatedly use, therefore, it of many uses.
Both arms steel cofferdam is the deep water cofferdam be most widely used at present, compare steel sheet-pile cofferdam, both arms steel cofferdam has the higher both arms box hat of intensity, head difference inside and outside larger cofferdam can be born, before the back cover of cofferdam, operation is simple, therefore in the application not by the restriction of the depth of water, cofferdam form the most frequently used in current deep water construction is become.
But above-mentioned cofferdam is all weir crest exceed the water surface without top girth weir, and both arms steel cofferdam and steel sheet-pile cofferdam all need under water " taking root ", therefore, for the cofferdam construction carried out in profundal zone (depth of water is greater than 10 meters), there is construction too complicated, high cost, uneconomic shortcoming.In addition, in existing cofferdam construction, need to carry out a large amount of basement process work, also make troubles to the cofferdam demolition after having constructed, be unfavorable for environmental protection and green construction,
Summary of the invention
For the deficiencies in the prior art, the object of the invention is to: provide one to close cofferdam structure under water, solve the construction complexity that existing cofferdam structure exists, the problem of high cost.
For achieving the above object, the technical solution used in the present invention is:
One closes cofferdam structure under water, and it is characterized in that, works outer fix is provided with the coaming plate of segment type under water, and described coaming plate is connected with the water seal of underwater structure lateral surface successively, described coaming plate along short transverse stacked and mutually water seal connect; The water liquid of described underwater structure inside is drawn out of, and make underwater structure inside form negative pressure, and the outer surface of underwater structure is close to by described coaming plate under suction function.
Described close cofferdam structure under water, wherein: also there is communicating passage between outside the inner and underwater structure of described underwater structure, all communicating passage all use cover plate shutoff.
Described closes cofferdam structure under water, wherein: block at coaming plate and/or the gap bat that leaks between cover plate and underwater structure.
Described closes cofferdam structure under water, wherein: the gap bat that leaks between coaming plate and underwater structure is blocked.
Described closes cofferdam structure under water, wherein: described water seal is rubber water-proof or water conservancy project modular belt concrete sealing.
Described closes cofferdam structure under water, and wherein: described coaming plate has steel work main body, and inside is provided with enclosed cavity, described enclosed cavity is connected with and fills draining valve and Air inflating and exhausting valve.
Described close cofferdam structure under water, wherein: fill draining valve described in the outside upstream face of described coaming plate is arranged, the inner side of coaming plate arranges described Air inflating and exhausting valve.
Compared with prior art, the beneficial effect that the present invention has is:
1, the invention solves economy required in the engineerings such as the maintenance of underwater structure or structure, process, local stiffening, transformation, reasonable, green, environmental protection, remove cofferdam problem easily.
2, because the present invention does not need to carry out basement process, coaming plate does not need to surface, and therefore the height in cofferdam can minimize, and has saved material and construction cost to the maximum limit.In addition, cofferdam of the present invention mainly utilizes water pressure to be fixed, not only make watertight construction more reliable, be easy to dismounting, and can not to underwater structure and basis formed other destroy, underwater structure can be protected in work progress.
3, to be applicable to construction environment narrow in the present invention, the standing water that work plane is less.
Accompanying drawing explanation
Fig. 1 is the closed under water cofferdam structure elevational schematic in a preferred embodiment of the present invention;
Fig. 2 is the closed under water cofferdam structure flat cutting schematic diagram in a preferred embodiment of the present invention;
Fig. 3, Fig. 4 are outside drawing and the structure principle chart of segment type coaming plate provided by the invention respectively.
Description of reference numerals: 1-underwater structure; 11-column; 2-coaming plate; 21-enclosed cavity; 22-fills draining valve; 23-Air inflating and exhausting valve; 3-cover plate.
Detailed description of the invention
In order to illustrate intuitively the present invention, below with a preferred embodiment, detailed discussion is carried out to the present invention.
As shown in Figure 1 and Figure 2, underwater structure 1 is had (as reservoir lock in profundal zone (depth of water is greater than 10 meters), but do not limit) need trimming, for the ease of construction, needed cofferdam construction outside underwater structure 1 before trimming, thus prevent water and soil from entering the refurbishment position of underwater structure 1 inside, so that carry out dry groove construction.
Therefore, in order to form closed cofferdam structure under water provided by the invention, need to adopt following steps:
A, Xiang Shuizhong hang in the coaming plate 2 of segment type, and each coaming plate 2 all sinks down into (as column 11) position outside profundal zone underwater structure 1;
B, described coaming plate 2 are connected with the water seal of underwater structure 1 lateral surface successively, described coaming plate 2 along short transverse stacked and mutually water seal connect;
If the described underwater structure 1 of B1 is inner and outside underwater structure 1 between also there is communicating passage, then use all communicating passage of cover plate 3 shutoff;
C, extracted out by the water liquid of underwater structure 1 inside, make underwater structure 1 inside form negative pressure, and the outer surface of underwater structure 1 is close to by described coaming plate 2 under suction function;
If find coaming plate 2 in C1 step C and/or there is leaking between cover plate 3 and underwater structure 1, then the form taking bat to wrap stuff up a crack carries out leak stopping.
So, the coaming plate 2 of segment type relies on negative pressure to be close to the outer surface of underwater structure 1, intercepts the refurbishment position that water and soil enters underwater structure 1 inside, forms unique cofferdam structure, so that carry out dry groove construction.
After dress work completes, by underwater structure 1 internal water flooding, make the hydraulic balance inside and outside underwater structure 1; Then remove and reclaim described coaming plate 2 (if having, also removing cover plate 3), to reuse.
Wherein, destruction can not be formed due to deadweight to underwater structure 1 surface in footless situation to make described coaming plate 2, the proportion of described coaming plate 2 with close to or the proportion that equals water be advisable, but consider and transport and the cost of lifting, then the proportion of coaming plate 2 is the smaller the better.Therefore, in embodiment provided by the invention, as Fig. 3, shown in Fig. 4, described coaming plate 2 has steel work main body, inside is provided with enclosed cavity 21 (number is not limit), described enclosed cavity 21 is connected with and fills draining valve 22 and Air inflating and exhausting valve 23 (the outside upstream face of general coaming plate 2 fills draining valve 22 described in arranging, the inner side of coaming plate 2 arranges described Air inflating and exhausting valve 23), in the process of transporting and lift, described enclosed cavity 21 is emptying, with weight reduction, and once be lifted into the water surface, then start water-filling, make its proportion close to or equal the proportion of water, like this, coaming plate 2 can sink to any degree of depth smoothly, and diver also can adjust the attitude of coaming plate 2 in water like a cork, thus easily the coaming plate 2 of segment type is fitted together and is close to outside underwater structure 1 and fixed.
And described cover plate 3, be the steel work plate body that the shape of leak stopping as required carries out designing.
Work progress of the present invention is introduced below by a detailed cofferdam construction scheme:
1) river bed is smooth
Sucking-off water-bed foreign material, mud: adopt gas-lifting type to inhale mud method and be discharged in storehouse by deposit by pipeline, leaving setting about 30 meters can meet the demands, and employing equipment sees the following form:
| Title | Model | Quantity | Purposes | Remarks |
| Air compressor machine | 10 cubes | 1 | The source of the gas inhaling mud is provided | ? |
| Job platform | Canoe | 2 | Submersible platform, desilting equipment platform | ? |
| Desilting equipment | 8 inches | 1 cover | Siphon away mud and be discharged into given place | ? |
| Giant | 8 kilograms | 1 cover | Wash away or rush loose deposit | ? |
| Diving apparatus | Pipe supplies | 3 covers | Diving operation | ? |
2) the concrete perfusion of water-bed leveling layer
In order to allow steel cofferdam contact tightly with face, river bed, by diver, bottom level gauge to be measured, smooth, carrying out the concrete perfusion of water-bed leveling layer if desired.
3) hoisted in position of coaming plate 2
A, general introduction:
The lifting of coaming plate 2 is divided into lifting on the bank with in place, adopt general-utility car handling defeated, when being lifted into place of entry, the maximum one side of coaming plate 2 one side area is contacted with the water surface from bank to waterside under water, increases contact surface area, reduces the draft of coaming plate 2; And adjust the attitude of coaming plate 2 in water, the one side of the guiding device of coaming plate 2 (for coordinating with guide rail under water, making coaming plate 2 correcting direction when dive) being surfaced, in order to avoid in haul process, guiding device being damaged, guaranteeing the smooth of installation.Described guiding device and guide rail not this Applicant's Abstract graph key content, can adopt common projection and the form of groove fit, therefore not repeat them here.
B, coaming plate 2 water surface transport by two cradles on No. 1 coaming plate 2 both sides, two ships start simultaneously, coaming plate 2 is freely ordered about by boatman at the water surface, before its water surface is transported to works, adopts the auxiliary lifting equipment be supported on above works to be connected with the Lifting Lug of coaming plate 2.
C, coxopodite coaming plate 2 is in place under water: coordinated by diver, to coaming plate 2 water-filling, before water-filling, Air inflating and exhausting valve 23 upward, connect stack to be exhausted, coaming plate 2 draining valve 22 that fills down is opened, water inlet in enclosed cavity 21, coaming plate 2 water line slowly increases, treat that coaming plate 2 water-filling is in half position (70%-80% of coaming plate 2 is under water), diver's closedown is filled draining valve 22 and is stopped water-filling with Air inflating and exhausting valve 23, hoist engine coordinates lifting, coaming plate 2 is made to be turned into vertical shape, wire rope is hung up by constructor, diver opens under water and fills draining valve 22 and continue water-filling with Air inflating and exhausting valve 23, ground observation water-filling situation, see that coaming plate 2 starts to sink, timely notice underwater diver closing gate valve, stop water-filling, hoist engine slowly loosens wire rope, coaming plate 2 is slowly declined along guiding device under the effect of deadweight, slow sinking, in sinking watching, diver observes sub-marine situations at any time, the position of adjustment coaming plate 2, make near underwater structures, pinpoint the problems and process in time.Diver observes coaming plate 2 when sinking to soon touching water-bed platform, inserts alignment pin, after location installed by alignment pin, opens and fills draining valve 22 and Air inflating and exhausting valve 23 water-filling comprehensively, make coaming plate 2 be full of water.
Middle coaming plate 2 is in place under water: with the program in place of above-mentioned coxopodite coaming plate 2, utilizes the internode location-plate be located on coaming plate 2 mutually to locate.
Epimerite coaming plate 2 is in place under water: before installation epimerite coaming plate 2, the distance of bottom surface is installed in the installation bottom surface first measuring epimerite coaming plate 2 to horizontal coaming plate 2, according to this distance adjustment epimerite coaming plate 2 water seal top thickness; Lower Hold is first full of water by epimerite coaming plate 2, the same coxopodite of program in place.
If necessary, horizontal cover plate 3 is sunk in place.
4) water seal
Float type coaming plate 2 mainly relies on hydraulic pressure to be fixed, and the contact surface of bottom surface and surrounding and structure is all flexible contact, thus selection water shutoff pattern and material most important.Usual buoyancy aid door water seal design type has rubber water-proof and water conservancy project modular belt concrete sealing, all feasible on two kinds of water shutoff formal techniques, but considers from easy construction, and split type vertical coaming plate 2 internode sealing uses selects rubber water-proof construction of being more convenient in place.May to leak place for local imprecision, the form taking bat to wrap stuff up a crack carries out leak stopping.
5) draining
After all vertical coaming plates 2 and horizontal cover plate 3 install, diver carries out submarine inspection, ensure: all gate valves are in closed condition, the position of each water seal is in place, do not have gap between vertical coaming plate 2 and works, bottom surface platform, between vertical coaming plate 2 saves and saves, location-plate is located well, and the alignment pin of vertical coaming plate 2 is all in place, there is no gap between horizontal cover plate 3 and works, between horizontal cover plate 3 and vertical coaming plate 2, there is no gap.Then carry out draining to the enclosure space after coaming plate 2, when draining, flow should not be too large, at the uniform velocity carry out, in order to avoid cause damage to coaming plate 2.
6) dismounting of coaming plate 2
A. connect vertical coaming plate 2 epimerite ventilating pipe, open the water-filling gate valve that epimerite coaming plate 2 is arranged, carry out water-filling concora crush.
B. after water-filling concora crush, diver coordinates hanging device, first removes horizontal cover plate 3;
C. vertically coaming plate 2 is removed from the top down successively, when epimerite coaming plate 2 is removed, removes the alignment pin of epimerite, vertical coaming plate 2 epimerite is lifted into the water surface by interim opening and closing device, reveals to micro-, the Air inflating and exhausting valve 23 of casing is connected with air compressor machine by gas tube, then gutter is connected, open and fill draining valve 22, air compressor machine inflation setting-out, to upper-deck cabin anhydrous discharge again, closing gate valve, remove gutter and gas tube, make it float up to the water surface, water transport lifts dried up to bank.
D. the alignment pin of each joint is removed successively, be lifted into the water surface by interim opening and closing device, reveal to micro-, the Air inflating and exhausting valve 23 of casing is connected with air compressor machine by gas tube, then gutter is connected, open and fill draining valve 22, air compressor machine inflation setting-out, anhydrous discharge again to annular seal space, valve-off, remove gutter and gas tube, make it float up to the water surface, water transport lifts dried up to bank.
The beneficial effect that technical solution of the present invention is brought
1, economical: not need to carry out dark process to basis, only need the finishing operations carrying out basis, condeep platform mainly plays the smooth bottom, easy construction.
2, environmental protection: it is convenient, pollution-free to remove, environmental protection.
3, flexible, motor-driven: the Underwater Engineering that local is needed reinforcement, keeped in repair, where can construct, where coaming plate 2 be built, reduces expenses, flexible, motor-driven.
4, easy construction: be main fixation pressure with water pressure, around without constraint, without bounds, construction simply.
Claims (7)
1. close a cofferdam structure under water, it is characterized in that, works outer fix is provided with the coaming plate of segment type under water, and described coaming plate is connected with the water seal of underwater structure lateral surface successively, described coaming plate along short transverse stacked and mutually water seal connect; The water liquid of described underwater structure inside is drawn out of, and make underwater structure inside form negative pressure, and the outer surface of underwater structure is close to by described coaming plate under suction function.
2. according to claim 1ly close cofferdam structure under water, it is characterized in that: also there is communicating passage between outside the inner and underwater structure of described underwater structure, all communicating passage all use cover plate shutoff.
3. closed cofferdam structure under water according to claim 2, is characterized in that: block at coaming plate and/or the gap bat that leaks between cover plate and underwater structure.
4. closed cofferdam structure under water according to claim 1, is characterized in that: the gap bat that leaks between coaming plate and underwater structure is blocked.
5. closed cofferdam structure under water according to claim 1, is characterized in that: described water seal is rubber water-proof or water conservancy project modular belt concrete sealing.
6. closed cofferdam structure under water according to claim 1, it is characterized in that: described coaming plate has steel work main body, and inside is provided with enclosed cavity, described enclosed cavity is connected with and fills draining valve and Air inflating and exhausting valve.
7. according to claim 6ly close cofferdam structure under water, it is characterized in that: fill draining valve described in the outside upstream face of described coaming plate is arranged, the inner side of coaming plate arranges described Air inflating and exhausting valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410342564.3A CN104213571A (en) | 2014-07-17 | 2014-07-17 | Underwater closed cofferdam structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410342564.3A CN104213571A (en) | 2014-07-17 | 2014-07-17 | Underwater closed cofferdam structure |
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| CN104213571A true CN104213571A (en) | 2014-12-17 |
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| CN201410342564.3A Pending CN104213571A (en) | 2014-07-17 | 2014-07-17 | Underwater closed cofferdam structure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105839652A (en) * | 2016-05-18 | 2016-08-10 | 中铁隧道集团二处有限公司 | Construction method for stacking containers for silt prevention in immersed tube end foundation trench under inner rock surface of cofferdam |
| CN111360460A (en) * | 2020-04-24 | 2020-07-03 | 交通运输部上海打捞局 | Automatic underwater dry-type high-pressure welding system |
| CN114809044A (en) * | 2022-05-13 | 2022-07-29 | 湖南望新建设集团股份有限公司 | River water-break cofferdam |
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| JPH07216855A (en) * | 1994-02-08 | 1995-08-15 | Ishikawajima Harima Heavy Ind Co Ltd | Temporary cofferdam device for weir or sluice |
| CN102425182A (en) * | 2011-12-01 | 2012-04-25 | 中国水电顾问集团华东勘测设计研究院 | Annular negative pressure foundation cofferdam and construction method thereof |
| CN203960885U (en) * | 2014-07-17 | 2014-11-26 | 北京翔鲲水务建设有限公司 | Seal cofferdam structure under water |
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2014
- 2014-07-17 CN CN201410342564.3A patent/CN104213571A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07216855A (en) * | 1994-02-08 | 1995-08-15 | Ishikawajima Harima Heavy Ind Co Ltd | Temporary cofferdam device for weir or sluice |
| CN102425182A (en) * | 2011-12-01 | 2012-04-25 | 中国水电顾问集团华东勘测设计研究院 | Annular negative pressure foundation cofferdam and construction method thereof |
| CN203960885U (en) * | 2014-07-17 | 2014-11-26 | 北京翔鲲水务建设有限公司 | Seal cofferdam structure under water |
Non-Patent Citations (1)
| Title |
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| 朱凤云: "浅谈官厅水库泄洪洞及进水塔检修门槽加固改造工程临时钢围堰安装", 《商品与质量·建筑与发展》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105839652A (en) * | 2016-05-18 | 2016-08-10 | 中铁隧道集团二处有限公司 | Construction method for stacking containers for silt prevention in immersed tube end foundation trench under inner rock surface of cofferdam |
| CN105839652B (en) * | 2016-05-18 | 2017-11-28 | 中铁隧道集团二处有限公司 | The anti-silting construction method of stacked containers in scar sinking pipe end foundation trench in cofferdam |
| CN111360460A (en) * | 2020-04-24 | 2020-07-03 | 交通运输部上海打捞局 | Automatic underwater dry-type high-pressure welding system |
| CN114809044A (en) * | 2022-05-13 | 2022-07-29 | 湖南望新建设集团股份有限公司 | River water-break cofferdam |
| CN114809044B (en) * | 2022-05-13 | 2023-12-22 | 湖南望新建设集团股份有限公司 | River water-break cofferdam |
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Application publication date: 20141217 |
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