CN102425182B - 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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- CN102425182B CN102425182B CN201110392363.0A CN201110392363A CN102425182B CN 102425182 B CN102425182 B CN 102425182B CN 201110392363 A CN201110392363 A CN 201110392363A CN 102425182 B CN102425182 B CN 102425182B
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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 required temporary construction fence body structure of offshore wind farm unit foundation construction.
Background technology
In China, Oversea wind power generation industry belongs to an emerging industry.After 2000, the development and utilization because country encourages regenerative resource, is developed rapidly domestic wind-power electricity generation industry.Because key technology area waits ripe cause, seldom, engineering design and construction experience is all not enough for the offshore wind farm engineering of implementing at present.
At present at sea in wind-powered electricity generation unit foundation construction process, on working procedure for the condition setting cofferdam for foundation construction creation dry work as temporary construction fence body, take sizing steel sheet-pile cofferdam conventional in barged-in fill cofferdam or bridge engineering more, not only the investment of self temporary works is large for above cofferdam form, duration is longer, and the larger environmental problem of existence, simultaneously for the impact of resisting severe marine environment need to be carried out the reinforcing work compared with large-engineering amount to cofferdam, for the construction of major project and the dismounting work in later stage bring inconvenience.
In addition, need to before major project, adopt special cofferdam construction ship to construct in advance, and be equipped with various auxiliary ships, the Description of Ship relating 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 to be solved in the present invention is: the problem based on needing to solve in offshore wind turbine foundation construction, and take into full account the ambient conditions in China coast marine site, a kind of annular negative pressure foundation cofferdam and job practices thereof of investing little, easy construction, safe ready is provided.
The technical solution adopted in the present invention is: a kind of annular negative pressure foundation cofferdam, it is characterized in that: described cofferdam is at least connected to form the cirque structure of a sealing from beginning to end by two negative-pressure foundation structures by connector, single negative-pressure foundation structure is at least spliced into one section of circular arc of described cirque structure by a bucket base.
Each barrel of base is the circular arc steel plate cylinder that radius is identical, and the bottom of steel plate cylinder is uncovered, and top is provided with air vent device, and steel plate cylinder inside is equipped with air bag and is communicated with air vent device.
The width of described bucket base is 1m, and in it, ring radius is 9 meters.
Described 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 of described annular negative pressure foundation cofferdam, is characterized in that comprising step:
1, in surface facility, make bucket base;
2, by air vent device, to the air bag in each barrel of base, inflate, rely on himself buoyancy, place it in sea, adopt the transportation of little rank transportation ship;
3, select depth condition to be less than negative-pressure foundation structure height for planning to build place, cofferdam, determine the quantity of the negative-pressure foundation structure that forms cofferdam, and the quantity that forms the bucket base of single negative-pressure foundation structure, then by air vent device, extract the gas in air bag, bucket base is sunk one by one and is pressed in mud by the circular arc of setting, form a negative-pressure foundation structure, finally each negative-pressure foundation structure is interconnected from beginning to end by connector, form the annular cofferdam of a sealing and sealing;
4, extract the central seawater in annular cofferdam, form Local Dry ground condition, in Local Dry ground, carry out blower foundation construction;
5, after blower foundation has been constructed, first to water-filling in cofferdam, then remove the connector between each negative-pressure foundation structure, by air vent device, to the air bag in each barrel of base, inflate and make foundation structure extract mud face.
The invention has the beneficial effects as follows: the critical piece in (1) cofferdam is negative-pressure foundation structure, negative-pressure foundation technology, as technique of design and construction ripe in the haulage device in offshore oil platform recovery process, can guarantee carrying out smoothly of this novel negative pressure basic constructional design and construction.(2) the required materials such as steel plate of negative-pressure foundation structure belong to conventional goods and materials, and ripe roll bending technique can be made large-sized foundation structure, and material goods and materials maturation abundant and construction technology can guarantee the making of each gauge size negative-pressure foundation.(3) negative-pressure foundation structure is the chief component of Temporary Cofferdam, also can utilize negative-pressure foundation self spatial volume large simultaneously, the feature that buoyancy is large, when transportation, directly place it on sea and haul, the horsepower grade that has reduced transportation ship has also reduced as the transportation ship of its configuration simultaneously, makes its shallow water along the coast that can cannot arrive at conventional ship and takes advantage of tide to enter area, intertidal zone.(4) a few negative-pressure foundation structure just can be combined to form a Temporary Cofferdam, and construction works amount is little, and the time is short.(5) in negative-pressure foundation structure, air bag is set, can increases the buoyancy in basic haul process, can inwardly inflate formation malleation, reduce the resistance in basic floating process simultaneously.(6) between each negative-pressure foundation structure, adopt the connector of moulding to connect and the ring-like cofferdam of fixing formation, simple aspect, reduces the engineering time.(7) each negative-pressure foundation structure, after remove in cofferdam, can reuse to next place, cofferdam, has reduced the loss of temporary services.
Have advantages of that in addition cheapness, easy construction, construction period are shorter.
Accompanying drawing explanation
Fig. 1 is the top view of the embodiment of the present invention.
Fig. 2 is the top view of negative-pressure foundation structure in Fig. 1.
Fig. 3 is the sectional view of negative-pressure foundation structure in Fig. 2.
The specific embodiment
As shown in Figure 1, the present embodiment annular negative pressure foundation cofferdam is connected to form the cirque structure of a sealing by the negative-pressure foundation structure of four 1/4 circular arcs by connector 4 head and the tail.Described negative-pressure foundation structure is spliced by three identical arc bucket bases 1, and bucket base 1 is an only curved plate cylinder of the uncovered 1-1 in bottom, and steel plate cylinder top is provided with air vent device 2, and steel plate cylinder inside is equipped with air bag 3 and this air bag is communicated with top air vent device 2.
Wherein air bag 3 is made 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 for bleeding or inflate to air bag 3.The width of this example bucket base 1 is 1 meter, and interior ring radius is 9 meters, highly general as long as a little more than planning to build the sea water advanced of place, cofferdam, be located at 10 meters of left and right according to practical experience height.
The present embodiment annular negative pressure foundation cofferdam specific implementation method is as follows:
A, at the surface facility barrel base 1 that completes;
After b, to be produced completing, by air vent device 2, to the air bag 3 in each barrel of base 1, inflate, rely on the large feature of himself buoyancy, directly bucket base 1 is put and adopted across the sea other cargo ship of little level to be only transported to plan to build place, cofferdam;
C, bucket base 1 are transported to behind appointed place, and the position of selecting depth condition to be less than barrel base 1 height is located for planning to build cofferdam, then carry out the seat basic skill or training order of negative-pressure foundation structure, first the gas extracting in air bag 3 by air vent device 2, form the inside and outside draught head of bucket base 1, bucket base 1 sinks one by one and is pressed in mud by the circular arc of setting, form negative-pressure foundation structure (three bucket bases form a negative-pressure foundation structure), after four negative-pressure foundation structure seat bottom application works, then carry out connector 4 constructions, negative-pressure foundation structure is tightly connected mutually by connector 4 head and the tail, form the cirque structure of a sealing and sealing, between adjacent two bucket bases 1, depending on field condition, determine whether need to connect and sealing,
After d, the installation of negative-pressure foundation structure, form annular negative pressure foundation cofferdam, extract the central seawater in cofferdam and form Local Dry ground condition, just can be to blower foundation 5 constructions in Local Dry ground;
E, in cofferdam function, complete need to remove time, first to water-filling in cofferdam, then remove the connector 4 between each negative-pressure foundation structure, by air vent device 2, to the air bag 3 in each barrel of base 1, inflate and make negative-pressure foundation structure extract mud face, utilize previous transportation ship haul negative-pressure foundation structure to next cofferdam construction place.
Claims (3)
1. the job practices of an annular negative pressure foundation cofferdam, described cofferdam is at least connected to form the cirque structure of a sealing by connector (4) head and the tail by two negative-pressure foundation structures, single negative-pressure foundation structure is at least spliced into one section of circular arc of described cirque structure by a bucket base (1);
Each barrel of base (1) is the circular arc steel plate cylinder that radius is identical, and the bottom of steel plate cylinder is uncovered (1-1), and top is provided with air vent device (2), and steel plate cylinder inside is equipped with air bag (3) and is communicated with air vent device (2);
It is characterized in that, the job practices in this cofferdam comprises the following steps:
1.1, in surface facility, make bucket base (1);
1.2, by air vent device (2), to the air bag (3) in each barrel of base (1), inflate, rely on himself buoyancy, place it in sea, adopt the transportation of little rank transportation ship;
1.3, select depth condition to be less than negative-pressure foundation structure height for planning to build place, cofferdam, determine the quantity of the negative-pressure foundation structure that forms cofferdam, and the quantity that forms the bucket base (1) of single negative-pressure foundation structure, then by air vent device (2), extract the gas in air bag (3), bucket base (1) is sunk one by one and is pressed in mud by the circular arc of setting, form a negative-pressure foundation structure, finally each negative-pressure foundation structure is interconnected by connector (4) head and the tail, form the annular cofferdam of a sealing and sealing;
1.4, extract the central seawater in annular cofferdam, form Local Dry ground condition, in Local Dry ground, carry out blower foundation (5) construction;
1.5, after blower foundation (5) has been constructed, first to water-filling in cofferdam, then remove the connector (4) between each negative-pressure foundation structure, by air vent device (2), to the air bag (3) in each barrel of base (1), inflate and make foundation structure extract mud face.
2. the job practices of annular negative pressure foundation cofferdam according to claim 1, is characterized in that: the width of described bucket base (1) is 1m, and in it, ring radius is 9 meters.
3. the job practices of annular negative pressure foundation cofferdam according to claim 1, is characterized in that: described air bag (3) is quality softness and the high rubberized fabric of tensile strength, and volume ratio bucket base (1) cavity volume is smaller.
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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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| CN102425182B true CN102425182B (en) | 2014-02-12 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104746523B (en) * | 2013-12-30 | 2016-05-04 | 上海勘测设计研究院 | cofferdam structure and using method thereof |
| CN104213571A (en) * | 2014-07-17 | 2014-12-17 | 北京翔鲲水务建设有限公司 | Underwater closed cofferdam structure |
| CN108166515B (en) * | 2017-12-29 | 2020-10-20 | 华北水利水电大学 | Hydraulic self-stabilizing underwater construction cofferdam |
| CN108331009B (en) * | 2018-04-28 | 2024-06-07 | 西南交通大学 | Negative pressure formula landing stage foundation construction 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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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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