CN103266619B - A kind of cofferdam structure - Google Patents
A kind of cofferdam structure Download PDFInfo
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- CN103266619B CN103266619B CN201310205219.0A CN201310205219A CN103266619B CN 103266619 B CN103266619 B CN 103266619B CN 201310205219 A CN201310205219 A CN 201310205219A CN 103266619 B CN103266619 B CN 103266619B
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- cofferdam
- watertight shutter
- vertical transfer
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Abstract
Embodiments provide a kind of cofferdam structure, solve in prior art and carry out lying on one's side transportation by driving for the cofferdam of some natural buoyancy deficiencies, the draft in cofferdam is greater than the minimum-depth in navigation channel, causes the problem that cofferdam is stranded in transportation by driving process.Cofferdam structure, comprise: comprise and be combined into frame closed structure, the first watertight shutter and the second watertight shutter by multiple side, wherein said first watertight shutter is arranged on the top mouth in cofferdam, described second watertight shutter is arranged on the end mouth in cofferdam, and the first side in described first watertight shutter, described second watertight shutter and described multiple side connects as one, described first side be cofferdam lie on one's side lower water time the side that first contacts with the water surface.
Description
Technical field
The present invention relates to bridge construction field, particularly a kind of cofferdam structure.
Background technology
In bridge construction process; usually can run into riverbed is exposed intectate apoplexy ashing rock; intensity is high, and conveniently the direct injection steel pipe pile of construction method and steel pile casting are difficult to effectively to embed riverbed and carry out anchoring, therefore must adopt large-scale bottomless cofferdam construction technology.Adopt and first transfer bottomless cofferdam, utilize bottom concrete to bury the drilled pile construction scheme of steel pile casting underground, effectively can solve drilling platform and set up the difficult problem with footing anchoring.Wherein, cofferdam is the bottomless frame closed structure of a kind of uncovered utilizing various shape steel to combine.
For cofferdam processing and the scheme of lower water, there is following way under normal circumstances: spell sleeping in launching position for cofferdam, then to be lain on one's side in assembled complete cofferdam lower water, adopt the mode of tugboat haul that cofferdam is transported to job site, more overall vertical transfer in water is carried out to cofferdam.But, for the cofferdam of some natural buoyancy deficiencies, even if the side that to be cofferdam midplane maximum, the side first contacting the water surface during its lower water, the draft in cofferdam is still greater than the minimum-depth in navigation channel, cause cofferdam stranded in transportation by driving process, cannot be arrived safe and sound job site in cofferdam.
Summary of the invention
In view of this, the embodiment of the present invention provides a kind of cofferdam structure, for solving in prior art, transportation by driving is carried out lying on one's side in the cofferdam of natural buoyancy deficiency, the draft in cofferdam is greater than the minimum-depth in navigation channel, cause cofferdam stranded in transportation by driving process, cannot be arrived safe and sound the problem of job site in cofferdam.
In order to achieve the above object, embodiments provide a kind of cofferdam, comprise and be combined into frame closed structure by multiple side, also comprise the first watertight shutter and the second watertight shutter, wherein said first watertight shutter is arranged on the top mouth in cofferdam, described second watertight shutter is arranged on the end mouth in cofferdam, and the first side in described first watertight shutter, described second watertight shutter and described multiple side connects as one, described first side be cofferdam lie on one's side lower water time the side that first contacts with the water surface.
The embodiment of the present invention additionally provides a kind of assembling method of cofferdam, comprising: from multiple side, choose the first side, the side first contacted with the water surface when described first side is water under cofferdam; The first watertight shutter and the second watertight shutter is produced according to the described area of the first side and the weight in cofferdam; With the first side the end of for, described multiple side is combined into frame closed structure, and described first watertight shutter is set at the top mouth of described frame closed structure, at the end mouth of described frame closed structure, described second watertight shutter is set, wherein, described first watertight shutter, described first side and described second watertight shutter be set to one and the height of described first watertight shutter and the second watertight shutter all higher than the draft under cofferdam during water.
The embodiment of the present invention additionally provides a kind of vertical transfer method of cofferdam, be applied to the cofferdam with watertight shutter, the top mouth in described cofferdam is provided with the first watertight shutter, the end mouth in described cofferdam is provided with the second watertight shutter, described first watertight shutter, first side in described second watertight shutter and described cofferdam connects as one, described first side be cofferdam lie on one's side lower water time the side that first contacts with the water surface, described method, comprise: after described cofferdam transportation by driving to bridge location Its Adjacent Waters, slowly mention to make the second watertight shutter of mouth at the bottom of cofferdam to surface cofferdam by crane barge and described second watertight shutter is cut, after watertight shutter has cut, by crane barge, is slowly steadily turned to vertical state in cofferdam.
The cofferdam structure that the embodiment of the present invention provides, first watertight shutter and the second watertight shutter are set respectively due to the top mouth in cofferdam, end mouth and first side in the first watertight shutter, the second watertight shutter and cofferdam is set to one, cofferdam is made to lie on one's side after lower water, first side in the first watertight shutter, the second watertight shutter and cofferdam is formed closed without hydrospace, thus add the effect that cofferdam natural buoyancy has ensured cofferdam gravity balance, solve the problem of natural buoyancy deficiency in cofferdam in prior art.
Accompanying drawing explanation
Figure 1 shows that the structural representation one in the cofferdam that the embodiment of the present invention provides;
Figure 2 shows that the assembling method flow chart one in the cofferdam that the embodiment of the present invention provides;
Figure 3 shows that in the embodiment of the present invention the method flow diagram that the first watertight shutter and the second watertight shutter are produced;
Figure 4 shows that in the embodiment of the present invention structural representation in the cofferdam with high-low cutting curb;
Figure 5 shows that the assembling method flowchart 2 in the cofferdam that the embodiment of the present invention provides;
Figure 6 shows that in the embodiment of the present invention flow chart of the parameter calculating concreting;
The vertical transfer method flow diagram in the cofferdam provided in one embodiment of the invention is provided;
Figure 8 shows that the structural representation two in the cofferdam that the embodiment of the present invention provides;
Figure 9 shows that in the embodiment of the present invention, cofferdam enters water layout schematic diagram.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, the present invention is described in further detail.
Figure 1 shows that a kind of cofferdam structure that the embodiment of the present invention provides, comprise and be combined into frame closed structure 1, first watertight shutter 2 and the second watertight shutter 3 by multiple side, wherein said first watertight shutter 2 is arranged on the top mouth of frame closed structure 1, described second watertight shutter 3 is arranged on the end mouth of frame closed structure 1, and the first side 11 in described first watertight shutter 2, described second watertight shutter 3 and described multiple side connects as one, described first side 11 for cofferdam lie on one's side lower water time the side that first contacts with the water surface.
Utilize and watertight shutter is set at the top mouth of frame closed structure and end mouth, close top mouth and the end mouth of frame closed structure, the similar hull of stroke without hydrospace, the effect of dash is played in cofferdam Xia Shui, transportation by driving process, add the problem that cofferdam natural buoyancy makes up cofferdam natural buoyancy deficiency, ensure the effect of cofferdam gravity balance; Meanwhile, when carrying out, in vertical transfer process, stablizing cofferdam center of gravity to cofferdam 4 after cofferdam is transported to destination, prevent cofferdam vertical transfer too fast.
Figure 2 shows that and assembled method flow diagram is carried out to the cofferdam shown in Fig. 1.
As shown in Figure 2, corresponding to the structure in above-mentioned cofferdam, the embodiment of the present invention additionally provides a kind of assembling method of cofferdam, can comprise:
Step 201: choose the first side from multiple side, the side first contacted with the water surface when described first side is water under cofferdam.
Step 202: produce the first watertight shutter and the second watertight shutter according to the described area of the first side and the weight in cofferdam.
Step 203: with the first side the end of for, is combined into frame closed structure by described multiple side, and arranges described first watertight shutter at the top mouth of described frame closed structure, arranges described second watertight shutter at the end mouth of described frame closed structure.
Wherein, described first watertight shutter, described first side and described second watertight shutter be set to one and the height of described first watertight shutter and the second watertight shutter all higher than the draft under cofferdam during water.
Figure 3 shows that in one embodiment of the invention the method flow diagram that the first watertight shutter and the second watertight shutter are produced.
What deserves to be explained is, the limit relative with a pair of the first side respectively with the second watertight shutter due to the first watertight shutter is connected, therefore the position of the first watertight shutter and the second watertight shutter is known, as long as the height obtaining the first watertight shutter and the second watertight shutter in this case just can realize the production to the first watertight shutter and the second watertight shutter.As shown in Figure 3, the production method of the first watertight shutter and the second watertight shutter is provided in an embodiment of the present invention, comprises:
Step 301: the lower water depth obtaining described cofferdam according to the described area of the first side and the weight in cofferdam.
Step 302: the height determining the first watertight shutter and the second watertight shutter according to described lower water depth, the height of described first watertight shutter and described second watertight shutter is greater than the lower water depth in described cofferdam.
Herein, cofferdam is defaulted as the cofferdam of symmetrical configuration, now, if cofferdam Xia Shui, the center of gravity in cofferdam and centre of buoyancy are on same vertical money, can from floating state aware in water in cofferdam, the weight in cofferdam should be equal with the buoyancy of water to cofferdam, therefore can obtain the lower water depth of water under cofferdam by step 301.So, only need the lower water depth being set to the height of the first watertight shutter and the second watertight shutter to be greater than cofferdam, under the cofferdam that can be after water stably from bubbling through the water column.
Step 303: produce the first watertight shutter and the second watertight shutter according to the length of side on a pair relative limit in described first watertight shutter and the height of the second watertight shutter, described first side, described a pair relative limit comprises as forming one side that is in mouth at the bottom of described cofferdam and that form in the mouth of top, described cofferdam.
In the above-described embodiments, acquiescence cofferdam is symmetrical structure, but in actual applications, due to the impact of water-bed landform, cofferdam usually needs the structure being set to have high-low cutting curb.As shown in Figure 4, in an embodiment of the present invention, the end mouth 12 in described cofferdam is made up of high-low cutting curb 121, and described high-low cutting curb 121 is fitted with the surface in riverbed 5 to be transferred.Such cofferdam can be agreed with water-bed contact surface is seamless, however due to cofferdam be dissymmetrical structure, its center of gravity and centre of buoyancy be not on same plumb line.This cofferdam cannot keep upright condition in water, inclination can be produced, for this reason as shown in Figure 5, in an embodiment of the present invention during transportation by driving, described produce the first watertight shutter and the second watertight shutter according to the described area of the first side and the weight in cofferdam before, also comprise:
Step 501: if the end mouth in described cofferdam is made up of high-low cutting curb, arranges balanced structure at end mouth and is positioned at same plumb line with the center of gravity and centre of buoyancy that make described cofferdam.
Wherein, for the setting of balanced structure, do not limit herein, only need to make the center of gravity in cofferdam and centre of buoyancy be positioned at same plumb line.Be that example is described in detail in order to concreting in the sword pin being used in high sword pin side herein, the effect reducing overall height of C.G. in steel cofferdam transportation by driving process can also be played at high sword pin side concreting.
As shown in Figure 6, in an embodiment of the present invention, the parameter of concreting is calculated in the following way:
Step 601: the barycentric coodinates obtaining cofferdam.
In the present embodiment, cofferdam entirety does not have symmetry, and corresponding position of centre of gravity should be tried to achieve according to labyrinth barycentric coodinates design formulas, and labyrinth barycentric coodinates design formulas is as follows:
X in formula
c, Y
c, Z
c: represent labyrinth X-direction, Y-direction, Z-direction barycentric coodinates (cm) respectively;
P
i: the weight (t) of each partitioned organization;
represent each partitioned organization X-direction, Y-direction, Z-direction barycentric coodinates (cm) respectively.
Step 602: the barycentric coodinates according to described cofferdam pass through moment balancing method, choose target sword pin and calculate concrete weight to be built in target sword pin from the high-low cutting curb of end mouth.
Step 603: concreting is carried out to target sword pin.
In an embodiment of the present invention, in order to prevent cofferdam vertical transfer too fast, center of gravity unstability, described with the first side the end of for, after described multiple side is combined into frame closed structure, also comprise: the face being provided with described first watertight shutter in described first side arranges vertical transfer plate, and the distance between described vertical transfer plate and described first watertight shutter equals the distance between described vertical transfer plate and described second watertight shutter.
The vertical transfer method in the cofferdam provided in one embodiment of the invention is provided.
As shown in Figure 7, corresponding to the structure in above-mentioned cofferdam, the embodiment of the present invention additionally provides a kind of vertical transfer method of cofferdam, can comprise:
Step 701: after described cofferdam transportation by driving to bridge location Its Adjacent Waters, slowly mentions to make the second watertight shutter of mouth at the bottom of cofferdam to surface cofferdam by crane barge and cuts described second watertight shutter.
Step 702: after watertight shutter has cut, is slowly steadily turned cofferdam to vertical state by crane barge.
In an embodiment of the present invention, describedly by crane barge, cofferdam slowly to be mentioned, comprising: crane barge auxiliary hook is in stress and will crane barge main hook be carried until the second watertight shutter of Di Kou side, cofferdam surfaces.
In an embodiment of the present invention, describedly by crane barge, slowly steadily to be turned to vertical state in cofferdam, comprising: crane barge main hook is evenly transferred and crane barge auxiliary hook is hooked up and coordinate with stable vertical transfer state.
In an embodiment of the present invention, the described cofferdam with watertight shutter also comprises vertical transfer plate, described vertical transfer plate is arranged in the first side and is provided with on the face of described first watertight shutter, and the distance between described vertical transfer plate and described first watertight shutter equals the distance of described vertical transfer plate and described second watertight shutter.
Assembled, the vertical transfer method in the cofferdam that the embodiment of the present invention provides, first watertight shutter and the second watertight shutter are set respectively due to the top mouth in cofferdam, end mouth and first side in the first watertight shutter, the second watertight shutter and cofferdam is set to one, cofferdam is made to lie on one's side after lower water, first side in the first watertight shutter, the second watertight shutter and cofferdam is formed closed without hydrospace, thus add the effect that cofferdam natural buoyancy has ensured cofferdam gravity balance, solve the problem of natural buoyancy deficiency in cofferdam in prior art.
Figure 8 shows that the structural representation two in the cofferdam that one embodiment of the invention provides.
As shown in Figure 8, in an embodiment of the present invention, in order to prevent cofferdam vertical transfer too fast, center of gravity unstability, described cofferdam, also comprise vertical transfer plate 4, described vertical transfer plate 4 is arranged in the first side 11 and is provided with on the face of described first watertight shutter 2, and the distance between described vertical transfer plate 4 and described first watertight shutter 2 equals the distance of described vertical transfer plate 4 and described second watertight shutter 3.Wherein, the height of described vertical transfer plate is less than the height of described first watertight shutter.
In an embodiment of the present invention, the end mouth in described cofferdam comprises high-low cutting curb, and the end mouth in described cofferdam is provided with balanced structure and is positioned at same plumb line with the center of gravity and centre of buoyancy that make described cofferdam.Solve because the center of gravity in cofferdam and centre of buoyancy are not positioned at same plumb line, cause cofferdam cannot keep upright condition in water, the problem of inclination during transportation by driving, can be produced.
In an embodiment of the present invention, described balanced structure is built in described high-low cutting curb with concrete form.Like this, the effect reducing overall height of C.G. in steel cofferdam transportation by driving process can also be played.
The scheme better understood the embodiment of the present invention to make those skilled in the art and provide, is now described in detail for the installation of cofferdam to cofferdam with high-low cutting curb.The installation in cofferdam comprises that cofferdam is assembled, cofferdam Xia Shui, cofferdam transportation by driving and cofferdam vertical transfer.
Step 801: assembled completely and weld seam detection is qualified to cofferdam.
Step 802: the first watertight shutter and second watertight shutter of mouth at the bottom of top, cofferdam weld.
Step 803: sword pin side edge pin concrete placings is risen in cofferdam.
Above step is the assembled of cofferdam, can implement in factory, also can implement at the construction field (site), the present invention does not award restriction, " at the bottom of top, cofferdam the welding of mouth watertight shutter " and the order of " sword pin side edge pin concrete placings is risen in cofferdam " these two steps do not award restriction in addition, in addition, how the first watertight shutter, the second watertight shutter are produced and to be described in detail in the above-described embodiments, repeat no more herein.
Step 804: earth anchor construction is also connected with cofferdam stern end.
Step 805: in water, tugboat is in place and be connected with cofferdam bow end.
Above step is at bridge construction field conduct.
Step 806: install air bag and inflate top lifting cofferdam.
Step 807: remove the assembled low moulding bed in cofferdam.
Step 808: air bag slippage cofferdam is to slideway slope section.
Step 809: cofferdam is the slow slippage of edge slip under Gravitative Loads; In slipping, can drag after earth anchor, in order to avoid cofferdam disequilibrium under deadweight glides too fast; Tugboat, air bag auxiliary adjustment glide direction simultaneously.
Fig. 9 is that in the embodiment of the present invention, cofferdam enters water layout schematic diagram.As shown in Figure 9, after cofferdam " sleeping spell ", cofferdam prepare under the water work in place after, by air bag 6 rolling transportation cofferdam is transported to and slides into edge, start detacher 7 cofferdam in Fig. 7 at the last moment and pour in water and realize from floating.
Above step 804-step 809 is the lower water in cofferdam.
Step 810: the mode taking " pushing tow+tie up and drag ", sea mule is main dragging, by cofferdam transportation by driving to job site.
Step 810 is the transportation by driving in cofferdam, under cofferdam after water under the dash effect of the first watertight shutter and the second watertight shutter, whole cofferdam forms one can from floating buoyancy tank, as same does not have dynamic barge.Due to the cofferdam bodily form special and deadweight larger, transportation by driving process is " going downstream ", according to body feature and the transportation by driving feature on water in cofferdam, consider the impact of water resistance, wind-force etc. in transportation by driving process, the tugboat of two operating characteristics advanced persons is adopted to be responsible for floating transport work to guarantee safety: the mode taking " pushing tow+tie up and drag ", sea mule is main dragging, by cofferdam transportation by driving to job site.
Step 811: after described cofferdam transportation by driving to bridge location Its Adjacent Waters, slowly mentions to make the second watertight shutter of mouth at the bottom of cofferdam to surface cofferdam by crane barge and cuts described second watertight shutter.
Step 812: after watertight shutter has cut, is slowly steadily turned cofferdam to vertical state by crane barge.
Step 811-step 812 is the vertical transfer in cofferdam, and the vertical transfer method in the cofferdam that its specific implementation and above-described embodiment provide is identical, repeats no more herein.
The mounting method in the cofferdam that the embodiment of the present invention provides, first watertight shutter and the second watertight shutter are set respectively due to the top mouth in cofferdam, end mouth and first side in the first watertight shutter, the second watertight shutter and cofferdam is set to one, cofferdam is made to lie on one's side after lower water, first side in the first watertight shutter, the second watertight shutter and cofferdam is formed closed without hydrospace, thus add the effect that cofferdam natural buoyancy has ensured cofferdam gravity balance, solve the problem of natural buoyancy deficiency in cofferdam in prior art.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement etc., all should be included within protection scope of the present invention.
Claims (1)
1. a cofferdam, comprise and be combined into frame closed structure by multiple side, it is characterized in that, also comprise the first watertight shutter and the second watertight shutter, wherein said first watertight shutter is arranged on the top mouth of described frame closed structure, described second watertight shutter is arranged on the end mouth of described frame closed structure, and the first side in described first watertight shutter, described second watertight shutter and described multiple side connects as one, described first side be cofferdam lie on one's side lower water time the side that first contacts with the water surface;
The height of described first watertight shutter and described second watertight shutter is determined according to the lower water depth in described cofferdam;
Described cofferdam also comprises vertical transfer plate, and described vertical transfer plate is arranged in the first side and is provided with on the face of described first watertight shutter, and the distance between described vertical transfer plate and described first watertight shutter equals the distance of described vertical transfer plate and described second watertight shutter; The height of described vertical transfer plate is less than the height of described first watertight shutter;
The end mouth in described cofferdam comprises high-low cutting curb, and the end mouth in described cofferdam is provided with balanced structure and is positioned at same plumb line with the center of gravity and centre of buoyancy that make described cofferdam; Described balanced structure is built in described high-low cutting curb with concrete form.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310205219.0A CN103266619B (en) | 2013-05-28 | 2013-05-28 | A kind of cofferdam structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310205219.0A CN103266619B (en) | 2013-05-28 | 2013-05-28 | A kind of cofferdam structure |
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| CN103266619A CN103266619A (en) | 2013-08-28 |
| CN103266619B true CN103266619B (en) | 2015-10-07 |
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| CN108589750B (en) * | 2018-05-14 | 2020-11-27 | 中交路桥北方工程有限公司 | Underwater vertical rotation construction method for steel cofferdam |
Citations (4)
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| CN201343735Y (en) * | 2008-12-23 | 2009-11-11 | 中铁大桥局股份有限公司 | Large-scale shallow water floating cofferdam |
| KR20120011120A (en) * | 2010-07-28 | 2012-02-07 | 홍문표 | installation of the waterproof cloths for work of the pier under water |
| CN202689015U (en) * | 2012-07-12 | 2013-01-23 | 中铁二十局集团第一工程有限公司 | Double-wall steel cofferdam for high-span prestressed concrete continuous beam deep water pier construction |
| CN203462479U (en) * | 2013-05-28 | 2014-03-05 | 中交路桥华南工程有限公司 | Cofferdam structure |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6178924A (en) * | 1984-09-26 | 1986-04-22 | Kajima Corp | Temporary coffering work for dry dock |
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2013
- 2013-05-28 CN CN201310205219.0A patent/CN103266619B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201343735Y (en) * | 2008-12-23 | 2009-11-11 | 中铁大桥局股份有限公司 | Large-scale shallow water floating cofferdam |
| KR20120011120A (en) * | 2010-07-28 | 2012-02-07 | 홍문표 | installation of the waterproof cloths for work of the pier under water |
| CN202689015U (en) * | 2012-07-12 | 2013-01-23 | 中铁二十局集团第一工程有限公司 | Double-wall steel cofferdam for high-span prestressed concrete continuous beam deep water pier construction |
| CN203462479U (en) * | 2013-05-28 | 2014-03-05 | 中交路桥华南工程有限公司 | Cofferdam structure |
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| "浅谈汇泉角至象嘴海湾大桥";周光华;《海岸工程》;20000930;第19卷(第3期);第37-38页第2节及图2-3 * |
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Inventor after: Che Chengzhi Inventor after: You Ji Inventor after: Xia Jiangnan Inventor after: Ling Yunfeng Inventor after: Qin Pengfei Inventor after: Zhao Fuli Inventor before: Liang Zhen Inventor before: Ling Yunfeng Inventor before: Xia Jiangnan Inventor before: Qin Pengfei Inventor before: Zhao Fuli Inventor before: Xue Zhanwen Inventor before: Wei Chao Inventor before: Chen Liang Inventor before: Chen Qidong |
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Effective date of registration: 20131115 Address after: 528400 Guangdong city of Zhongshan Province East Xing Zheng Road No. 1 Central Plaza 3 floor 17 Applicant after: Road & Bridge South China Engineering Co., Ltd. Applicant after: Anhui Highway Holding Group Co., Ltd. Applicant after: Road & Bridge International Co., Ltd. Address before: 528400 Guangdong city of Zhongshan Province East Xing Zheng Road No. 1 Central Plaza 3 floor 17 Applicant before: Road & Bridge South China Engineering Co., Ltd. |
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