CN102425182A - Annular negative pressure foundation cofferdam and construction method thereof - Google Patents
Annular negative pressure foundation cofferdam and construction method thereof Download PDFInfo
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- CN102425182A CN102425182A CN2011103923630A CN201110392363A CN102425182A CN 102425182 A CN102425182 A CN 102425182A CN 2011103923630 A CN2011103923630 A CN 2011103923630A CN 201110392363 A CN201110392363 A CN 201110392363A CN 102425182 A CN102425182 A CN 102425182A
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Abstract
The invention relates to an annular negative pressure foundation cofferdam and a construction method thereof. The invention aims to provide the annular negative pressure foundation cofferdam which is low in investment, easy and convenient to construct, and safe and convenient and the construction method for the annular negative pressure foundation cofferdam. According to the technical scheme, the annular negative pressure foundation cofferdam is characterized in that: at least two negative pressure foundation structures are connected end to end through a connecting piece to form a closed annular structure, and the single negative pressure foundation structure is spliced into a section of circular arc of the annular structure by at least one bucket foundation. The cofferdam is suitable for a temporary surrounding structure required by offshore wind turbine foundation construction.
Description
Technical field
The present invention relates to a kind of annular negative-pressure foundation cofferdam and job practices thereof.Be applicable to the interim enclosing body structure that the foundation construction of offshore wind farm unit is required.
Background technology
In China, the Oversea wind power generation industry belongs to an emerging industry.After 2000,, domestic wind-power electricity generation industry is developed rapidly because country encourages the development and utilization of regenerative resource.Because key technology area waits ripe cause, the offshore wind farm engineering of implementing at present seldom, the engineering design and construction experience is all not enough.
At present at sea in the wind-powered electricity generation unit foundation construction process; On the working procedure of condition setting cofferdam of creating dry work for foundation construction as interim enclosing body; Take typing steel sheet-pile cofferdam commonly used in barged-in fill cofferdam or the bridge engineering more; Not only the investment of self temporary works is big for above cofferdam form, and the duration is longer, and has bigger environmental problem; Need carry out reinforcing work to the cofferdam for the influence of resisting abominable marine environment simultaneously, for the construction of major project and the dismounting work in later stage bring inconvenience than the large-engineering amount.
In addition, need before major project, adopt special cofferdam construction ship to construct in advance, and be equipped with various auxiliary ships, the Description of Ship that relates to is many, and the construction period is long, has increased the investment of wind-powered electricity generation engineering.
Summary of the invention
The technical problem that the present invention will solve is: based on the problem that needs in the offshore wind turbine foundation construction to solve; And take into full account the ambient conditions in the coastal marine site of China, a kind of annular negative-pressure foundation cofferdam and job practices thereof of investing little, easy construction, safe ready is provided.
The technical scheme that the present invention adopted is: a kind of annular negative-pressure foundation cofferdam; It is characterized in that: said cofferdam is connected to form the cirque structure of a sealing by two negative-pressure foundation structures through connector at least from beginning to end, and single negative-pressure foundation structure is spliced into one section circular arc of said cirque structure at least by a bucket base.
Each barrel base is the identical circular arc steel plate tube of radius, and the bottom of steel plate tube is uncovered, and the top is provided with air vent device, and steel plate tube inside is equipped with air bag and is communicated with air vent device.
The width of said bucket base is 1m, and ring radius is 9 meters in it.
Said air bag is quality softness and the high rubberized fabric of tensile strength, and volume ratio bucket base cavity volume is smaller.
The job practices in described annular negative-pressure foundation cofferdam is characterized in that comprising step:
1, makes the bucket base in surface facility;
2, inflate through the air bag of air vent device in each barrel base, rely on himself buoyancy, place it in the sea, adopt the transportation of little rank transportation ship;
3, select depth condition to locate for planning to build the cofferdam less than the negative-pressure foundation structure height; Confirm the quantity of the negative-pressure foundation structure in composition cofferdam, and the quantity of forming the bucket base of single negative-pressure foundation structure, extract the interior gas of air bag through air vent device then; The bucket base is sunk one by one by the circular arc of setting and is pressed in the mud; Form a negative-pressure foundation structure, at last each negative-pressure foundation structure is interconnected through connector from beginning to end, form the annular cofferdam of a sealing and sealing;
4, extract the central seawater in annular cofferdam, form the local ground condition of doing, in dried ground, part, carry out blower foundation and construct;
5, after blower foundation construction is accomplished,, remove the connector between each negative-pressure foundation structure then, inflate through the air bag of air vent device in each barrel base and make foundation structure extract the mud face at first to water-filling in the cofferdam.
The invention has the beneficial effects as follows: the critical piece in (1) cofferdam is the negative-pressure foundation structure; The negative-pressure foundation technology can guarantee carrying out smoothly of this novel negative pressure basic constructional design and construction as design and construction technology ripe in the haulage device in the offshore oil platform recovery process.(2) the required materials such as steel plate of negative-pressure foundation structure belong to conventional goods and materials, and ripe roll bending technology can be made large-sized foundation structure, and the abundant maturation with construction technology of material goods and materials can guarantee the making of each gauge size negative-pressure foundation.(3) the negative-pressure foundation structure is the chief component in interim cofferdam; Simultaneously also can utilize negative-pressure foundation self spatial volume big; The characteristics that buoyancy is big; The time directly place it on the sea in transportation and to haul, the horsepower grade that has reduced the transportation ship has also reduced be the transportation ship of its configuration simultaneously, makes its shallow water along the coast that can can't arrive at conventional ship and to take advantage of tide entering intertidal zone regional.(4) a few negative-pressure foundation structure just can be combined to form an interim cofferdam, and the construction works amount is little, and the time is short.(5) in the negative-pressure foundation structure air bag is set, promptly can increases the buoyancy in the basic haul process, can inwardly inflate the formation malleation simultaneously, reduce the basis and play the resistance in the floating process.(6) adopt the connector of moulding to connect and the ring-like cofferdam of fixing formation between each negative-pressure foundation structure, simple aspect reduces the engineering time.(7) each negative-pressure foundation structure can reuse to next place, cofferdam after remove in the cofferdam, has reduced the loss of temporary services.
Has short advantage of cheapness, easy construction, construction period in addition.
Description of drawings
Fig. 1 is the vertical view of the embodiment of the invention.
Fig. 2 is the vertical view of negative-pressure foundation structure among Fig. 1.
Fig. 3 is the sectional view of negative-pressure foundation structure among Fig. 2.
The specific embodiment
As shown in Figure 1, present embodiment annular negative-pressure foundation cofferdam is connected to form the cirque structure of a sealing through connector 4 head and the tail by the negative-pressure foundation structure of four 1/4 circular arcs.Said negative-pressure foundation structure is spliced by three identical arc bucket bases 1, and bucket base 1 is the only curved plate tube of the uncovered 1-1 in bottom, and steel plate tube top is provided with air vent device 2, and steel plate tube inside is equipped with air bag 3 and this air bag is communicated with top air vent device 2.
Wherein air bag 3 is processed for quality softness and the high rubber dry goods material of tensile strength, and volume ratio bucket base 1 cavity volume is smaller, and air vent device 2 is used for bleeding or inflating to air bag 3.The width of this example bucket base 1 is 1 meter, and interior ring radius is 9 meters, and is highly general as long as a little more than planning to build the sea water advanced of place, cofferdam, be located at about 10 meters based on the practical experience height.
Present embodiment annular negative-pressure foundation cofferdam practical implementation method is following:
A, at the surface facility bucket base 1 that completes;
B, wait to complete after, inflate through the air bag 3 of air vent device 2 in each barrel base 1, rely on the big characteristics of himself buoyancy, directly bucket base 1 is placed on the sea and adopts little other cargo ship of level only to be transported to plan to build the place, cofferdam;
After c, bucket base 1 are transported to the appointed place, select depth condition to locate for planning to build the cofferdam less than the position of bucket base 1 height; Carry out the seat basic skill or training preface of negative-pressure foundation structure then; At first pass through the gas in the air vent device 2 extraction air bags 3, the draught head inside and outside the formation bucket basic 1, bucket basic 1 sinks one by one by a circular arc of setting and is pressed in the mud; Form negative-pressure foundation structure (three bucket bases are formed a negative-pressure foundation structure); After four negative-pressure foundation structure seat bottom application workers finish, carry out connector 4 constructions then, the negative-pressure foundation structure is tightly connected through connector 4 head and the tail each other; Form the cirque structure of a sealing and sealing, look the field condition decision between adjacent two bucket bases 1 and whether need connect and seal;
After d, the installation of negative-pressure foundation structure, form annular negative-pressure foundation cofferdam, extract the central seawater in cofferdam and form the local ground condition of doing, just can be in dried ground, part to blower foundation 5 constructions;
E, when the function completion need to be removed in the cofferdam; At first to water-filling in the cofferdam; Remove the connector 4 between each negative-pressure foundation structure then; Inflate through the air bag 3 of air vent device 2 in each barrel base 1 and to make the negative-pressure foundation structure extract the mud face, utilize previous transportation ship haul negative-pressure foundation structure to next cofferdam construction place.
Claims (5)
1. annular negative-pressure foundation cofferdam; It is characterized in that: said cofferdam is connected to form the cirque structure of a sealing by two negative-pressure foundation structures through connector (4) head and the tail at least, and single negative-pressure foundation structure is spliced into one section circular arc of said cirque structure at least by a bucket base (1).
2. annular negative-pressure foundation according to claim 1 cofferdam; It is characterized in that: each barrel base (1) is the identical circular arc steel plate tube of radius; The bottom of steel plate tube is uncovered (1-1); The top is provided with air vent device (2), and steel plate tube inside is equipped with air bag (3) and is communicated with air vent device (2).
3. annular negative-pressure foundation according to claim 2 cofferdam is characterized in that: the width of said bucket base (1) is 1m, and ring radius is 9 meters in it.
4. annular negative-pressure foundation according to claim 2 cofferdam is characterized in that: said air bag (3) is quality softness and the high rubberized fabric of tensile strength, and volume ratio bucket base (1) cavity volume is smaller.
5. the job practices in an annular negative-pressure foundation as claimed in claim 2 cofferdam is characterized in that comprising step:
5.1 make bucket base (1) in surface facility;
5.2 inflate through the air bag (3) of air vent device (2) in each barrel base (1), rely on himself buoyancy, place it in the sea, adopt the transportation of little rank transportation ship;
5.3 selecting depth condition locates for planning to build the cofferdam less than the negative-pressure foundation structure height; Confirm the quantity of the negative-pressure foundation structure in composition cofferdam; And the quantity of forming the bucket base (1) of single negative-pressure foundation structure; Extract the gas in the air bag (3) through air vent device (2) then, bucket base (1) is sunk one by one by the circular arc of setting and is pressed in the mud, form a negative-pressure foundation structure; At last each negative-pressure foundation structure is interconnected through connector (2) head and the tail, form the annular cofferdam of a sealing and sealing;
5.4 extract the seawater in the middle of the annular cofferdam, form the local ground condition of doing, in dried ground, part, carry out blower foundation (5) construction;
5.5 blower foundation (5) at first to water-filling in the cofferdam, is removed the connector (4) between each negative-pressure foundation structure after constructing and accomplishing then, inflates through the air bag (3) of air vent device (2) in each barrel base (1) to make foundation structure extract the mud face.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110392363.0A CN102425182B (en) | 2011-12-01 | 2011-12-01 | Annular negative pressure foundation cofferdam and construction method thereof |
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| CN201110392363.0A CN102425182B (en) | 2011-12-01 | 2011-12-01 | Annular negative pressure foundation cofferdam and construction method thereof |
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Cited By (6)
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| CN104213571A (en) * | 2014-07-17 | 2014-12-17 | 北京翔鲲水务建设有限公司 | Underwater closed cofferdam structure |
| CN104746523A (en) * | 2013-12-30 | 2015-07-01 | 上海勘测设计研究院 | Cofferdam structure and application method thereof |
| CN108166515A (en) * | 2017-12-29 | 2018-06-15 | 华北水利水电大学 | A kind of waterpower self-stabilization type underwater construction cofferdam |
| CN108331009A (en) * | 2018-04-28 | 2018-07-27 | 西南交通大学 | Suction type Conveyor belt constructing structure |
| CN110397052A (en) * | 2019-07-30 | 2019-11-01 | 中交一航局第二工程有限公司 | Dry construction system and dry operating environment construction method for underwater repair |
| CN113338286A (en) * | 2021-05-31 | 2021-09-03 | 华新建工集团有限公司 | Pile foundation safety device for building engineering |
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| CN108166515A (en) * | 2017-12-29 | 2018-06-15 | 华北水利水电大学 | A kind of waterpower self-stabilization type underwater construction cofferdam |
| CN108331009A (en) * | 2018-04-28 | 2018-07-27 | 西南交通大学 | Suction type Conveyor belt constructing structure |
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| CN110397052A (en) * | 2019-07-30 | 2019-11-01 | 中交一航局第二工程有限公司 | Dry construction system and dry operating environment construction method for underwater repair |
| CN113338286A (en) * | 2021-05-31 | 2021-09-03 | 华新建工集团有限公司 | Pile foundation safety device for building engineering |
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Address after: 310014 Hangzhou city in the lower reaches of the city of Zhejiang Wang Road, No. 22 Patentee after: HYDROCHINA HUADONG ENGINEERING Corp.,Ltd. Address before: 310014 Hangzhou city in the lower reaches of the city of Zhejiang Wang Road, No. 22 Patentee before: Hydrochina Hangzhou Engineering Corp. Address after: 310014 Hangzhou city in the lower reaches of the city of Zhejiang Wang Road, No. 22 Patentee after: POWERCHINA HUADONG ENGINEERING Corp.,Ltd. Address before: 310014 Hangzhou city in the lower reaches of the city of Zhejiang Wang Road, No. 22 Patentee before: HYDROCHINA HUADONG ENGINEERING Corp.,Ltd. |
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