CN101319504A - Sea floor suction type foundation immersion method - Google Patents
Sea floor suction type foundation immersion method Download PDFInfo
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- CN101319504A CN101319504A CNA2008100404777A CN200810040477A CN101319504A CN 101319504 A CN101319504 A CN 101319504A CN A2008100404777 A CNA2008100404777 A CN A2008100404777A CN 200810040477 A CN200810040477 A CN 200810040477A CN 101319504 A CN101319504 A CN 101319504A
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- bucket base
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Abstract
The invention relates to a method for sinking and placing submarine suction-type foundations. According to a principle that sandy sediment is easy to be liquefied under the action of high-frequency vibration, the outer wall of a bucket-shaped foundation is uniformly provided with a plurality of high-frequency micro-amplitude vibration sources; under the action of high-frequency micro-amplitude vibration, the bucket wall can destroy the structure of touched sediment and liquefy the sediment, so as to obviously reduce the frictional resistance borne by the sidewall of the bucket-shaped foundation and increase the initial mud-driving depth of the bucket-shaped foundation in the process of sinking and placing the bucket-shaped foundation, which provides good sealing conditions for successfully applying negative pressure and increases the speed and success rate of sinking and placing the bucket-shaped foundation. Meanwhile, a directional power supply source is adopted, which only supplies power to the high-frequency micro-amplitude vibration sources on the higher side of the bucket-shaped foundation according to the inclined direction of the bucket-shaped foundation, so as to speed up the sinking of the higher side of the bucket-shaped foundation, achieve automatic deviation rectification effect and guarantee the vertical sinking of the bucket-shaped foundation. When the use of the bucket-shaped foundation is ended, the high-frequency micro-amplitude vibration sources are first turned on so as to liquefy the sediment close to the bucket wall, and then water is injected and the bucket-shaped foundation is pulled up, thereby efficiency can be obviously improved.
Description
Technical field
The present invention relates to a kind of sea floor suction type foundation construction technology that is used for fixing marine facilities such as offshore platform, FPSO, particularly a kind of immersion method with automatic deviation correction function belongs to field of ocean engineering.
Background technology
Along with earth land petroleum resources is exhausted day by day, the world today more and more payes attention to the exploitation marine oil and gas.Offshore platform structure is the base of offshore production operation and life as the infrastructure of marine oil and gas development of resources.Bucket base (as a bucket that tips upside down in the soil) as a kind of novel sea form of structure, gains great popularity in newly-built ocean platform construction.China's seat of honour barrel base oil recovery platform was successfully installed at Shengli Oil Field field of razor clam north CB20B well group on October 25th, 1999.Before bucket base is installed, by deadweight injection certain depth in the soil, held concurrently before this to creating " airtight " condition with after-applied negative pressure.After the deadweight injection stops, extracting the water that is enclosed in basic internal out by the pump that is installed in basic top, thereby in bucket, form a pressure differential.This pressure differential drives in cylinder in the soil just, until desired depth, so be also referred to as " suction type foundation ".Use this method, a diameter is 9m, and height is that the bucket base of 10m the soonest can installation in 1～3 hour.When the platform needs are mobile, can in bucket, apply malleation (water filling) again cylinder foundation is extracted from soil.This " negative pressure injection, malleation pull up " construction technology makes traditional fixed offshore platform become mobile platform, can be recycled and reused for a plurality of Oilfield developing, greatly reduces single Oilfield developing cost.
For suction type foundation, we can accomplish " down go, stand surely, afford to pull out " in total hope.Wherein, " down go " be meant bucket base can be reposefully, keep certain verticality ground injection to desired depth; After " standing surely " promptly to sink, can be during operation can not cause that whole platform topples because of unstability, slippage or destruction such as extract, also be unlikely to produce excessive additional settlement; " afford to pull out " then being meant this basis after a local oil well has been adopted, when the basis can be pulled up and be dragged to other oil well place or penetration process and run into big gravel and can't install, can pull up and carry out injection again.At present, remain in the solution of two important techniques problems urgent needs: 1) initial penetration into mud problem.The bottom of bucket adopts thin wall construction can be added to the mud amount, to reach " airtight " condition that can successfully apply negative pressure, but because the requirement of stability, the bucket bottom can not be designed enough thinly, when running into submarine surface iron plate sand (for structural sand), even very thin, still be difficult to reach the initial penetration into mud requirement, make next step operation end; 2) bucket base all tilt problem may occur in initial injection or suction penetration process.In case bucket base tilts, it is gone in the mud process can be because the skew of center of gravity, and makes gradient increasing, so, how promptly in time to be corrected in the starting stage that bucket base tilts, this is the key point of bucket base success injection.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of suction type foundation immersion method that has the automatic deviation correction function is provided, make that verticality meets the demands in its sinking process, and rely on the high frequency micro breadth oscillation to carry out sinking, make its sinking effect on chiltern fine sediment sea bed higher.
The present invention is achieved through the following technical solutions, the present invention is on existing suction type foundation immersion method basis, under the dither effect, easily produce the principle of liquefaction phenomenon according to the chiltern fine sediment, apply a plurality of high frequency micro breadth oscillations source in the bucket base sidewall outside, its high frequency micro breadth oscillation makes that the inside and outside both sides of bucket base sidewall silt produces liquefaction, the sediment structure that hardens is destroyed, the bucket base that is arranged in this vibration source influence area injection silt that sinks easily can reach the effect of automatic deviation correction by starting the partial vibration source.
Described existing suction type foundation immersion method, promptly present used " negative pressure injection, malleation pull up " method.
Described high frequency micro breadth oscillation source, vibration frequency arrange evenly that in the bucket base sidewall outside arrangement pitch is 1～3m greater than 75Hz.
Described automatic correction method is by discerning the electric supply installation of bucket base incline direction, specially to the dither source power supply of the higher side in position, quicken the sinking injection speed of this side, realizing automatic leveling.
Compared with prior art, basic principle of the present invention is to utilize the effect of high frequency micro breadth oscillation to destroy to harden sediment structure, force silt liquefaction, and the way that adopts part to open vibration source realizes the automatic deviation correction effect in the suction type foundation immersion.And, when suction type foundation pulls up, open all vibration sources, make the inside and outside both sides of foundation side wall silt produce liquefaction, then pull out on it and will be more prone to.Technology of the present invention is implemented easily, cost is low, and the sinking of suction type foundation and pull up the efficient height.
Description of drawings
The elevational schematic view of Fig. 1 embodiment of the invention structure.
The floor map of Fig. 2 embodiment of the invention structure.
Among the figure, 1. high frequency micro breadth oscillation source; 2. location-plate; 3. directed power supply; 4. bucket base.
The specific embodiment
Fig. 1 and Fig. 2 have illustrated structural configuration of the present invention.The lateral wall of bucket base 4 is provided with a plurality of high frequency micro breadth oscillations source 1, can evenly arrange arrangement pitch 1～3m.Bucket base lateral wall vertical direction is provided with guide rail (guide rail of each vibration source), and high frequency micro breadth oscillation source 1 can move up and down along guide rail.In bucket base 4 sinking processes, the location-plate 2 that is positioned at the sea bed surface is the locus in high frequency micro breadth oscillation source 1 fixedly, makes high frequency micro breadth oscillation source be positioned at the above certain altitude in sea bed surface always, highly general desirable 20～50cm.Directed power supply 3 is positioned at the end face of bucket base 4, can be simultaneously to each high frequency micro breadth oscillation source power supply, and, when bucket base 4 tilts, it also can be according to its incline direction, only, improve the injection speed of this side of bucket base, realize the automatic deviation correction in the bucket base sinking process the vibration source power supply of the higher side in position.
At bucket base 4 during near the sea bed face, can start power supply, allow all high frequency micro breadth oscillation sources 1 all vibrate, the sediment structure that makes the bucket base sidewall be touched destroys, and generation liquefaction, can improve the initial penetration into mud degree of depth of bucket base so greatly, thereby provide good " airtight " condition for successfully applying negative pressure.In bucket base sinking process, in case run-off the straight, directed power supply 3 can after gradient obtains correcting and meets the demands, be powered to all high frequency micro breadth oscillation sources just now again selectively to the high frequency micro breadth oscillation source power supply of a higher side.The bucket base injection after desired depth, powered-down.Directed power supply 3 needs in addition design voluntarily, and on the used power supply automaton of existing marine environment, interpolation is the device of perceived inclination direction automatically, and the power supply automaton can be according to the control of powering of this incline direction.
After bucket base uses end, can open directed power supply 3 earlier, to all high frequency micro breadth oscillation sources 1 power supplies, make near the silt of bucket base sidewall liquefy, to reduce the frictional resistance that pulls out on it in process, water filling produces malleation in bucket base again, and bucket base is ejected the mud face.
The above-mentioned description to embodiment is can understand and apply the invention for ease of those skilled in the art.The person skilled in the art obviously can easily make various modifications to these embodiment, and needn't pass through performing creative labour being applied in the General Principle of this explanation among other embodiment.Therefore, the invention is not restricted to the embodiment here, those skilled in the art should be within protection scope of the present invention for improvement and modification that the present invention makes according to announcement of the present invention.
Claims (8)
1, a kind of sea floor suction type foundation immersion method, it is characterized in that: on the basis of existing suction type foundation immersion method, arrange a plurality of high frequency micro breadth oscillations source at the bucket base outer wall, the bucket wall is under the effect of high frequency micro breadth oscillation, make that the sediment structure that is touched is destroyed, silt produces liquefaction, the suffered frictional resistance of bucket base sidewall reduces, and bucket base injection sea bed reaches desired depth.
2, sea floor suction type foundation immersion method as claimed in claim 1, it is characterized in that: adopt directed power supply, according to the bucket base incline direction and only to the high frequency micro breadth oscillation source power supply of upper side, rely on the vibration in the high frequency micro breadth oscillation source of this side, reduce the bucket wall of this side and go into mud frictional resistance, make this side fall rate be higher than opposite side, thereby realize the effect of automatic deviation correction, guarantee the bucket base vertical subsidence.
3, sea floor suction type foundation immersion method as claimed in claim 1 is characterized in that: described existing suction type foundation immersion method, promptly present used " negative pressure injection, malleation pull up " method.
4, sea floor suction type foundation immersion method as claimed in claim 1 or 2 is characterized in that: described high frequency micro breadth oscillation source, its vibration frequency arrange evenly at the bucket base outer wall that greater than 75Hz arrangement pitch is 1～3m; Bucket base lateral wall vertical direction is laid guide rail, and high frequency micro breadth oscillation source can move up and down along guide rail; In bucket base sinking process, high frequency micro breadth oscillation source space position is fixed by location-plate, and is positioned at the above 20～50cm in sea bed surface always.
5, sea floor suction type foundation immersion method as claimed in claim 2, it is characterized in that: described directed power supply can be determined the incline direction of bucket base automatically, and according to the bucket base incline direction and only to the high frequency micro breadth oscillation source power supply of upper side; When the bucket base verticality meets the demands, to all high frequency micro breadth oscillation source power supplies.
6, sea floor suction type foundation immersion method as claimed in claim 4 is characterized in that: described location-plate is always on the sea bed surface, and is positioned at the bottom of place, high frequency micro breadth oscillation source guide rail, between location-plate and the high frequency micro breadth oscillation source for being rigidly connected.
7, sea floor suction type foundation immersion method as claimed in claim 1, it is characterized in that: the control mode to high frequency micro breadth oscillation power supply that use in the source comprises: 1) at bucket base during near the sea bed face, can start power supply, allow all high frequency micro breadth oscillation sources all vibrate, the sediment structure that makes the bucket base sidewall be touched destroys, and produce liquefaction, improve the initial penetration into mud degree of depth of bucket base; 2) in bucket base sinking process, in case run-off the straight, directed power supply can only be powered to the high frequency micro breadth oscillation source of a higher side according to incline direction automatically, after gradient obtains correcting and meets the demands, just now again to all high frequency micro breadth oscillation source power supplies; 3) the bucket base injection is after desired depth, powered-down.
8, sea floor suction type foundation immersion method as claimed in claim 1 or 2, it is characterized in that: after bucket base uses end, open earlier all high frequency micro breadth oscillation sources, make after the silt liquefaction that closes on barrel wall again that water filling pulls up bucket base, can obviously raise the efficiency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100404777A CN101319504B (en) | 2008-07-11 | 2008-07-11 | Sea floor suction type foundation immersion method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100404777A CN101319504B (en) | 2008-07-11 | 2008-07-11 | Sea floor suction type foundation immersion method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101319504A true CN101319504A (en) | 2008-12-10 |
| CN101319504B CN101319504B (en) | 2011-03-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100404777A Expired - Fee Related CN101319504B (en) | 2008-07-11 | 2008-07-11 | Sea floor suction type foundation immersion method |
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| CN (1) | CN101319504B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102926394A (en) * | 2010-06-05 | 2013-02-13 | 朱虹 | Method for using lime piles to rectify deviation of open caisson |
| CN103981905A (en) * | 2014-04-30 | 2014-08-13 | 天津大学 | Real-time monitoring method for sinking attitude of composite bucket foundation for offshore wind turbine |
| CN107640289A (en) * | 2017-09-14 | 2018-01-30 | 浙江大学 | A kind of new semi-buried square foundation and its installation method |
| CN109695264A (en) * | 2019-01-21 | 2019-04-30 | 大连理工大学 | A kind of suction type cylindrical foundation sinks cylinder correction and bracing means and its construction method |
| CN110185059A (en) * | 2019-06-25 | 2019-08-30 | 福建省水利水电勘测设计研究院 | A kind of suction tube jacket wind turbine foundation and its construction method |
| CN110241839A (en) * | 2019-06-20 | 2019-09-17 | 卢兴德 | A kind of suction type cylindrical foundation |
-
2008
- 2008-07-11 CN CN2008100404777A patent/CN101319504B/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102926394A (en) * | 2010-06-05 | 2013-02-13 | 朱虹 | Method for using lime piles to rectify deviation of open caisson |
| CN102926394B (en) * | 2010-06-05 | 2015-03-25 | 朱虹 | Method for using lime piles to rectify deviation of open caisson |
| CN103981905A (en) * | 2014-04-30 | 2014-08-13 | 天津大学 | Real-time monitoring method for sinking attitude of composite bucket foundation for offshore wind turbine |
| CN103981905B (en) * | 2014-04-30 | 2016-02-24 | 天津大学 | A kind of offshore wind turbine compound cartridge type foundation immersion attitude method of real-time |
| CN107640289A (en) * | 2017-09-14 | 2018-01-30 | 浙江大学 | A kind of new semi-buried square foundation and its installation method |
| CN107640289B (en) * | 2017-09-14 | 2019-07-16 | 浙江大学 | A kind of semi-buried square foundation and its installation method |
| CN109695264A (en) * | 2019-01-21 | 2019-04-30 | 大连理工大学 | A kind of suction type cylindrical foundation sinks cylinder correction and bracing means and its construction method |
| CN109695264B (en) * | 2019-01-21 | 2023-09-19 | 大连理工大学 | Suction type cylindrical foundation sinking cylinder rectifying and reinforcing device and construction method thereof |
| CN110241839A (en) * | 2019-06-20 | 2019-09-17 | 卢兴德 | A kind of suction type cylindrical foundation |
| CN110185059A (en) * | 2019-06-25 | 2019-08-30 | 福建省水利水电勘测设计研究院 | A kind of suction tube jacket wind turbine foundation and its construction method |
| CN110185059B (en) * | 2019-06-25 | 2023-12-22 | 福建省水利水电勘测设计研究院 | Suction barrel jacket fan foundation and construction method thereof |
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| Publication number | Publication date |
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| CN101319504B (en) | 2011-03-16 |
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