CN107399409A - The installation method of ocean platform propeller - Google Patents

The installation method of ocean platform propeller Download PDF

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Publication number
CN107399409A
CN107399409A CN201610344740.6A CN201610344740A CN107399409A CN 107399409 A CN107399409 A CN 107399409A CN 201610344740 A CN201610344740 A CN 201610344740A CN 107399409 A CN107399409 A CN 107399409A
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CN
China
Prior art keywords
propeller
ocean platform
open caisson
installation
borehole
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CN201610344740.6A
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Chinese (zh)
Inventor
夏广印
杜之富
滕瑶
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China International Marine Containers Group Co Ltd
Yantai CIMC Raffles Offshore Co Ltd
CIMC Offshore Engineering Institute Co Ltd
Original Assignee
China International Marine Containers Group Co Ltd
Yantai CIMC Raffles Offshore Co Ltd
CIMC Offshore Engineering Institute Co Ltd
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Application filed by China International Marine Containers Group Co Ltd, Yantai CIMC Raffles Offshore Co Ltd, CIMC Offshore Engineering Institute Co Ltd filed Critical China International Marine Containers Group Co Ltd
Priority to CN201610344740.6A priority Critical patent/CN107399409A/en
Publication of CN107399409A publication Critical patent/CN107399409A/en
Pending legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B63SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63BSHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B71/00Designing vessels; Predicting their performance

Abstract

The invention provides a kind of installation method of ocean platform propeller, comprise the following steps:One open caisson is set in the seabed of harbour, it is predetermined altitude to make the height between open caisson inner bottom wall and sea level;Transfer the designated area in propeller to open caisson;Mobile ocean platform, makes the installation site of propeller on ocean platform be located at the surface of open caisson;Propeller is lifted to ocean platform bottom, and is fixed on the ocean platform.The method of the present invention can carry out the installation of propeller near harbour, and cost expenses are low, influenceed small, short construction period by weather sea situation, and more environmentally-friendly and follow-up maintenance is easy, spend less.

Description

The installation method of ocean platform propeller
Technical field
The present invention relates to ocean engineering and field of shipbuilding, more particularly to a kind of installation method of ocean platform propeller.
Background technology
From the birth of First semisubmersible platform in 1961 till now, by over half a century, the 7th state-of-the-art semisubmersible platform in the generation world is had evolved to.The classification of semisubmersible platform can be according to:The form of structure, can the marine site of operation, the depth of operation, the depth of drilling well, the ability of positioning, multiple dimensions such as degree of automation determine.Positioning is that platform resists sea turn, wave and the effect of stream by mooring or mooring system so that platform is held on setting position and orientation.Semisubmersible platform gradually moves towards deep water or the operation of ultra-deep-water marine site, and no matter mooring or anchoring system compare in terms of operability or in terms of economy, no longer meet the positioning requirements of modern semisubmersible platform.
The continuous improvement of computer technology and sensor technology, the alignment system of semisubmersible platform is set gradually to be substituted by dynamic positioning system.With the raising of automaticity and operating efficiency, the size of semisubmersible platform also has the trend of increase, and such as the semisubmersible platform of current main flow is generally higher than 14 meters from waterline is moved to the distance of underwater propeller bottom, and some can be more than 17 meters.14 meters to 17 meters of fairway depth near general harbour, and when propeller is installed under water, it is necessary to the depth of water be 17 meters to 21 meters, much the depth of water than the navigation channel of the harbour of large-tonnage is deep.
The underwater of propeller is provided with two kinds of main modes at present, and first method is that platform is dragged to the profundal zone away from harbour, and the advantage of this scheme need not be put into the early stage.But due to meeting that waters of the depth of water more than 18 meters is often open off-lying sea, stormy waves is bigger, it is necessary to the change of moment concern weather.Cause Extractable Heavy Metals number considerably less.In order to carry out the installation of propeller under water, tens of days or even some months are often waited.This today increasingly sharpened for competition, do not allow, because evening delivers one day, it is meant that tens of thousands of fine to hundreds of thousands dollar.
Second method is to excavate deepwater wharf.The advantage of here scheme is to be influenceed by weather smaller.It is just breakup in installation process, installation can be suspended, propeller is stayed in seabed, waits weather to continue to install after taking a turn for the better with cable in harbour semisubmersible platform.But because the deposits such as the seabed silt in terminal enclosure coastal waters domain, organic matter are especially more, mobility is relatively good, therefore have to expand the scope excavated, the silt of surrounding is rushed over again to prevent the effect due to ocean.However, it is still desirable to regularly safeguarded, to ensure the depth of deepwater wharf.It is especially big that the shortcomings that this mode, is that initial stage puts into, and maintenance cost is also higher.
The content of the invention
The depth of water of terminal enclosure near sea is limited to it is an object of the invention to solve ocean platform propeller installation method in the prior art, spends that cost is high, is easily influenceed by weather sea situation, the problem of long construction period, later maintenance difficulty.
In order to solve the above technical problems, the present invention provides a kind of installation method of ocean platform propeller, comprise the following steps:One open caisson is set in the seabed of harbour, it is predetermined altitude to make the height between open caisson inner bottom wall and sea level;Transfer the designated area in propeller to the open caisson;Mobile ocean platform, makes the installation site of propeller on ocean platform be located at the surface of the open caisson;The propeller is lifted to ocean platform bottom, and is fixed on the ocean platform.
Preferably, it is described to be specifically included the step of the seabed of harbour sets an open caisson:Prefabricated open caisson on the bank;The open caisson is transferred on the position of seabed demarcation using crane gear;Excavating seabed silt by excavating equipment makes the well sinking to the height between its inner bottom wall and sea level be predetermined altitude;Back cover construction is carried out to open caisson.
Preferably, hanger is set on the open caisson, and the crane gear is engaged with hanger makes open caisson transfer on the position of seabed demarcation.
Preferably, the open caisson is steel open caisson, and the open caisson includes:The borehole wall, in both ends open and the column of inner hollow, its bottom terminal ends is provided with cutting shoe;Shrouding, positioned at the bottom of the borehole wall;Stiffening profile, it is arranged at the inwall of the borehole wall.
Preferably, the cross section of the caisson wall is in track type or ellipse, and outer wall and the harbour of the borehole wall have interval.
Preferably, the length direction of the open caisson is vertical with the harbour.
Preferably, the interval L of the borehole wall outer wall and harbour meets:L>D1+d2+d3+d4, wherein, d1 is the diameter of propeller, and d2 is that the installation site of propeller arrives the distance of ocean platform topside, d3 to refute beam, d4 for rubber back cushion width.
Preferably, the stiffening profile includes:It is horizontally placed on the perpendicular reinforcement that is willfully strong and being vertically installed in the borehole wall inwall of the borehole wall inwall.
Preferably, it is respectively provided with anode loss protection on the borehole wall and the stiffening profile.
Preferably, it is described lifting propeller into the step of ocean platform bottom, in addition to:Crane gear and rigging are set on the ocean platform, and the propeller is risen to ocean platform bottom using crane gear and rigging.
Preferably, the installation site of the rigging through propeller on ocean platform is transferred in the open caisson, and the rigging is installed in place on the propeller below installation site.
Preferably, in the step of mobile ocean platform, the ocean platform is moved using winch and hawser, the installation site of the ocean platform is located at the surface of open caisson.
Compared with prior art, beneficial effects of the present invention are:
Method provided by the invention need not excavate deepwater wharf, profundal zone is dragged to without by ocean platform, the installation of propeller can be carried out near harbour, cost expenses are low, influenceed by weather sea situation small, short construction period, compared with excavating deepwater wharf, the fuel consumption and pollutant emission problem of dredger are contrasted, the scheme that the present invention excavates open caisson is more environmentally-friendly, and follow-up maintenance is easy, spend less.
Brief description of the drawings
Fig. 1 is the schematic flow sheet of ocean platform propeller installation method of the present invention.
Fig. 2 be ocean platform propeller installation method of the present invention embodiment in caisson structure schematic diagram.
Fig. 3 be ocean platform propeller installation method of the present invention embodiment in caisson wall cross-sectional view.
Fig. 4 be ocean platform propeller installation method of the present invention embodiment in open caisson diagrammatic cross-section.
Fig. 5 be ocean platform propeller installation method of the present invention embodiment in open caisson and ocean platform arrange schematic diagram in harbour.
Fig. 6 be ocean platform propeller installation method of the present invention embodiment in ocean platform and propeller scheme of installation.
Description of reference numerals is as follows:1st, open caisson;11st, the borehole wall;111st, cutting shoe;12nd, shrouding;13rd, stiffening profile;131st, it is willfully strong;132nd, erect and strengthen;14th, hanger;2nd, ocean platform;21st, the installation site of propeller;3rd, propeller;4th, barge;5th, rubber back cushion;6th, harbour;7th, sea level.
Embodiment
Embodying the exemplary embodiment of feature of present invention and advantage will describe in detail in the following description.It should be understood that the present invention can have various changes in different embodiments, it is neither departed from the scope of the present invention, and explanation therein and diagram are treated as purposes of discussion in itself, and is not used to the limitation present invention.
In order to further illustrate the principle and structure of the present invention, in conjunction with accompanying drawing to a preferred embodiment of the present invention will be described in detail.
Refering to Fig. 1 to Fig. 6, the present invention provides a kind of installation method of ocean platform propeller, and this method comprises the following steps:
S10:One open caisson 1 is set in the seabed of harbour 6, it is predetermined altitude to make the height between the inner bottom wall of open caisson 1 and sea level 7.
S20:Transfer the designated area in propeller 3 to the open caisson 1.
S30:Mobile ocean platform 2, makes the installation site 21 of propeller on ocean platform 2 be located at the surface of the open caisson 1.
S40:The propeller 3 is lifted to the bottom of ocean platform 2, and is fixed on the ocean platform 2.
The method of the present invention sets an open caisson 1 in harbour 6, one can be obtained at the marine site of harbour 6 than the deeper regional area of the harbour depth of water itself to meet the installation requirements of propeller, the depth of the regional area is above-mentioned " predetermined altitude ", can flexibly be realized by the design to open caisson size.According to the demand of general ocean platform, it is somebody's turn to do " predetermined altitude " and is generally more than 21 meters of requirements that can meet the state-of-the-art 7th generation drilling platforms propeller installation in the current world, the method according to the invention, can only have the installation that 14 meters to 17 meters of coastal waters harbour realizes propeller in the universal depth of water, without ocean platform 2 is dragged into the profundal zone away from harbour 6, without excavation deepwater wharf.
More preferably, in step slo, can first prefabricated open caisson 1 on the coast;Crane gear is recycled to transfer to open caisson 1 on the position of seabed demarcation;Then the height that excavating seabed silt by excavating equipment makes the open caisson 1 sink down between its inner bottom wall and sea level 7 is predetermined altitude;Such as open caisson bottom is the structure of chiltern, rubble with certain fluidity, then finally needs to carry out back cover construction to open caisson 1.
The open caisson 1 of the present embodiment uses steel construction, steel structure sinking well 1 is almost non-maintaining, and it can effectively prevent the borehole wall 11 from caving in, silt inflow open caisson 1, compared with the open caisson 1 of concrete structure, steel open caisson 1 is overall lighter, make simply, installation is convenient, and construction period can save more than 50% than concrete open caisson 1.
Referring to Fig. 2 to Fig. 4, the steel open caisson 1 of the present embodiment includes the borehole wall 11, shrouding 12 and stiffening profile 13, and the material of three is steel.
Wherein, the borehole wall 11 is in both ends open and the column of inner hollow, and cross section is in track type, and in other embodiment, the cross section of the borehole wall 11 is alternatively the other shapes such as ellipse, circular or rectangle.The borehole wall 11 is the chief component of open caisson 1, for earth-retaining and bear pressure caused by the surrounding soil of open caisson 1 and water, the borehole wall of the track type borehole wall 11 of the present embodiment compared with other shapes, the strength range for bearing external force is bigger than the rectangle borehole wall, build and be easier on designing than the oval borehole wall, weight than the circular borehole wall is lighter, and the scope of application is wider.
The bottom terminal ends of the borehole wall 11 are provided with cutting shoe 111, and cutting shoe 111 can be used for cutting soil in the sinking watching of open caisson 1 and ensureing that open caisson 1 smoothly sinks.
Shrouding 12 positioned at the bottom of the borehole wall 11 is the bearing structure of open caisson 1, for preventing bottom sediment from entering in open caisson 1.
Stiffening profile 13 is arranged at the inwall of the borehole wall 11, for preventing the borehole wall 11 from flexing occurs and forming good entirety with the borehole wall 11, in the present embodiment, stiffening profile 13 includes being horizontally set on willfully strong the 131 of the inwall of the borehole wall 11 and is vertically installed in the perpendicular reinforcement 132 of the inwall of the borehole wall 11.More preferably, in order to prevent steel from corrosion occurring in the seawater, anode loss protection can be respectively provided with the borehole wall 11 and stiffening profile 13.
The size and depth of open caisson 1 are determined according to the factor such as the size of propeller 3 and the underwater soil layer of harbour 6.
Specifically, the determination of the size of open caisson 1.According to market survey, the size of propeller 3 of semisubmersible platform is substantially between 3.2 meters to 4.9 meters at present, additionally due to the propeller 3 of semisubmersible platform is different from a distance from topside, so needing to consider the installation site of different semisubmersible platforms.According to the statistics of more than ten of project, the installation site 21 of propeller is 3.7 meters from the minimum range of topside, maximum distance is 14.3 meters, in order to adapt to larger range of installation requirement, the distance for taking minimum is 3 meters, and ultimate range is 16 meters, then the mounting tool of additional propeller 3, consider certain design gaps and form error, determine a diameter of 10m of semicircle in track type open caisson 1.
The depth of open caisson 1 needs to consider the depth of the underwater dirt bed of harbour 6, and open caisson 1 is typically extended into lithosphere, if dirt bed is too thick, such as more than 10 meters, open caisson 1 can only extend into 10 meters of dirt bed, and because its bottom uses back cover, the depth of open caisson 1 is set to 20m.
Completed on the coast according to the structure of the open caisson 1 determined, material and size prefabricated, the welding and application of open caisson 1 are completed on the coast, crane gear is recycled to transfer to open caisson 1 on the position of seabed demarcation, more preferably, hanger 14 can be set on open caisson 1, be engaged using the hanger 14 on crane on the bank and open caisson 1 and transfer open caisson 1.
Refering to Fig. 5, generally have anchor bracket in view of the topside of ocean platform 2, go to dock 6 when all use barge 4 and the transition of rubber back cushion 5, therefore positioning of the open caisson 1 in the seabed of harbour 6 needs to make the outer wall of the borehole wall 11 of open caisson 1 and harbour 6 have certain interval, generally, interval L needs to meet:L>D1+d2+d3+d4, wherein, d1 is the diameter of propeller 3, and d2 is that the installation site 21 of propeller arrives the distance of the topside of ocean platform 2, and d3 is the width of barge 4, and d4 is the width of rubber back cushion 5.
It is to make the length direction of open caisson 1 vertical with harbour 6 more preferably for putting position of the open caisson 1 in seabed, this putting position can reduce the construction space of open caisson 1, that improves open caisson 1 utilizes area, while also allows in the installation process of propeller 3, the movement and u-turn of ocean platform 2.
After open caisson 1 is placed in the position of seabed demarcation, the height that excavating seabed silt by excavator makes open caisson 1 sink down between its inner bottom wall and sea level 7 is predetermined altitude, finally carries out back cover construction to open caisson 1.
After the completion of the construction of open caisson 1, you can continue the installation steps of follow-up propeller 3 in the present inventive method.
The present invention is further detailed explanation with the embodiment of a practical application below in conjunction with the accompanying drawings.
Refering to Fig. 5 and Fig. 6, the present embodiment illustrates the implementation process that the propeller 3 of the present invention is installed exemplified by installing semisubmersible drilling platform.The agent structure of semisubmersible drilling platform generally comprises lower floating body, the multiple columns being vertically arranged on lower floating body at two intervals, and the deck box by upright supports.Propeller is the bottom that lower floating body is installed on by the installation site 21 of propeller.
The ocean platform is the 7th generation semisubmersible drilling platform, and stationkeeping ability reaches DP3, is equipped with 8 all-direction propellers 3, the installation site 21 of the propeller of the ocean platform is mounting hole.4.9 meters of the diameter of propeller 3,8.5 meters of setting height(from bottom), absorb water 11.2 meters.The port and starboard of propeller 3 of semi-submersible type drilling platform is arranged symmetrically, and 4 propellers 3 are respectively arranged on the lower floating body of port and starboard.Fig. 5 illustrates the deployment scenarios of the propeller on the lower floating body of larboard in the ocean platform, wherein 2 propellers 3 are apart from 13.9 meters of larboard topside, 2 apart from 4.6 meters of larboard topside in addition.
The first step:According to the step S20 of the above method of the present invention, four propellers 3 and the lifting of supporting saddle base are transferred to open caisson 1 using crane on the bank, respectively about 29.6 meters, 24.7 meters, 21.5 meters and 16.6 meters of offshore side, it is allowed to certain error be present.
Second step:According to step S30, semisubmersible platform is moved using the winch on harbour 6 and hawser, makes the mounting hole site of its afterbody or stem in the surface of open caisson 1.
3rd step:Such as step S40, lifting propeller 3 is fixed on semisubmersible platform to semisubmersible platform bottom.
Specifically, crane and rigging are set on semisubmersible platform, rigging is transferred in open caisson 1 from three propeller mounting holes on semisubmersible platform, again by diver's dive to open caisson 1, rigging is installed in the eye plate of the propeller 3 below mounting hole, in this operation, because underwater visibility is than relatively low, using strop diver can be guided to find propeller 3.
After rigging installation, the bottom for making propeller 3 rise to semisubmersible platform is engaged using crane and rigging, then the fastener of First propeller 3 is arranged on semisubmersible platform, fastener includes the fastener of propeller room and underwater fastener.
The winch and hawser movement semisubmersible platform on harbour 6 are recycled, the mounting hole site in the middle part of platform is repeated above-mentioned step in the surface of open caisson 1, the 2nd, the 3rd and the 4th propeller 3 is arranged on semisubmersible platform.
Then semisubmersible platform is reversed end for end using tugboat, its another side of a ship is set to pull in shore, and its afterbody or stem is set to be moved to the surface of open caisson 1, remaining four propellers 3 are lifted into open caisson 1 using crane on the bank, about 29.6 meters, 24.7 meters, 21.5 meters and 16.6 meters of offshore side respectively, it is allowed to certain error be present.
Finally repeat the above steps, the 5th, the 6th, the 7th and the 8th propeller 3 is arranged on platform, is finally completed the installation of 8 propellers 3 of semisubmersible platform.
The installation of 8 all-direction propellers is carried out to the 7th generation semisubmersible platform according to the method for the invention described above, whole process is completed in harbour, influenceed by weather small, and due to having harbour as object of reference, offshore is closer, the positioning accuracy of propeller and semisubmersible platform ratio is high at deep-sea, and diver dives also easier than at deep-sea to water to propeller is found.
During follow-up operation, in possible open caisson may a certain amount of silt of alluviation, but as long as the actual measurement depth of water meets the requirement can of propeller.If after several years, the actual measurement depth of open caisson is unsatisfactory for the requirement of installation, can be washed away using giant, it is much lower that cost rents dredger after much being deposited than deepwater wharf.Detection for the depth of water, because scope is smaller, the manual depth measurement of form of rod member or rope weighting material can be used.And the depth measurement of deepwater wharf can only use sonar to carry out, and the depth measurement of large area is carried out, after spending Cost comparisons, the advantage of installation method of the present invention is apparent.
The installation method of ocean platform propeller of the present invention, it is the installation that propeller can be achieved in harbour, at least with advantages below according to above-mentioned introduction:
1st, short construction period, cost-effective:With excavating deepwater wharf contrast, from can normal 17 meters to 18 meters of the navigation channel in course the depth of water, dig and arrive 21 meters of the size that can install full-size propeller, at least need downward 3 meters of digging.By taking certain Hai Gong general assemblies company as an example, the scope of excavation is 160 meters wide, and 780 meters long, total excavation grave mound cubic meter of stone reaches 37.44 ten thousand steres, it is necessary to construct the several months, at least millions of members of expense.And use the scheme of open caisson, it is only necessary to which less than 100,000 yuan, the steel construction borehole wall can manufacture on land, can be constructed in shipyard, and can make full use of the leftover pieces of shipyard.Excavating open caisson only needs the time all less than one.With being dragged to deep-sea installation Comparison, by taking main flow semisubmersible platform 6 to 8 as an example, whole installation period needs about one and a half months, and only the rent of pilotage, tugboat and rental hanging device is just close to 5,000,000 yuan.And in the time of this one and a half months, platform can't synchronously carry out installation and the debugging efforts of remaining equipment.If using open caisson scheme, it is not necessary to pilotage, need there was only about 20,000 yuan with a tugboat, several hours, rent this time when only reversing end for end.When semisubmersible platform moves, the crane of harbour can be used using the winch and hawser of harbour, during lifting, whole process is that shipyard is equally shared by all cost, just much of that less than 100,000 yuan.Contrasted with concrete structure open caisson, when reaching equal design requirement, the weight of concrete structure is about 2500 tons, cost of manufacture takes around 500,000, position is formulated, it is necessary to which concrete structure is first checked using barge because weight is bigger, it is being lifted into seabed specified location using crane barge, the expense that this process only rents crane barge just reaches 5,000,000, and total cost reaches 5,500,000 yuan.And steel structure sinking well is used, dead load is about 300 tons, and cost of manufacture is about 900,000, it is only necessary to which the crawler crane or truck crane can of two 200 tons of crane capacities are lifted into specified location, and required expense is about 20,000 yuan, and total cost is less than 1,000,000 yuan.As can be seen from the above data, steel structure sinking well arrangement and method for construction more cost-effective than concrete construction scheme more than 80%.
2nd, it is more environmentally-friendly:Compared with excavating deepwater wharf.First, the fuel consumption and pollutant emission problem of contrast dredger, it is clear that more environmentally-friendly using the scheme for excavating open caisson.Second, excavating deepwater wharf needs to dig out the silt of 37.44 ten thousand sides, and the scheme of open caisson only needs the silt of 0.16 ten thousand sides.The former so big amount is placed on everywhere has certain influence to environment, and the influence very little of the latter.Compared with being dragged to profundal zone, it is clear that more environmentally-friendly in harbour installation using open caisson from the perspective of energy consumption and pollutant emission.
Although describing the present invention with reference to several exemplary embodiments, it is to be understood that, term used is explanation and exemplary and nonrestrictive term.Because the present invention can be embodied without departing from the spiritual or substantive of invention in a variety of forms, it is to be understood that, above-mentioned embodiment is not limited to any foregoing details, and should widely be explained in the spirit and scope that appended claims are limited, therefore the whole changes fallen into claim or its equivalent scope and remodeling all should be appended claims and covered.

Claims (12)

1. a kind of installation method of ocean platform propeller, it is characterised in that comprise the following steps:
One open caisson is set in the seabed of harbour, it is predetermined altitude to make the height between open caisson inner bottom wall and sea level;
Transfer the designated area in propeller to the open caisson;
Mobile ocean platform, makes the installation site of propeller on ocean platform be located at the surface of the open caisson;
The propeller is lifted to ocean platform bottom, and is fixed on the ocean platform.
2. the installation method of ocean platform propeller according to claim 1, it is characterised in that described to be specifically included the step of the seabed of harbour sets an open caisson:
Prefabricated open caisson on the bank;
The open caisson is transferred on the position of seabed demarcation using crane gear;
Excavating seabed silt by excavating equipment makes the well sinking to the height between its inner bottom wall and sea level be predetermined altitude;
Back cover construction is carried out to open caisson.
3. the installation method of ocean platform propeller according to claim 2, it is characterised in that hanger is set on the open caisson, and the crane gear is engaged with hanger makes open caisson transfer on the position of seabed demarcation.
4. the installation method of ocean platform propeller according to claim 1, it is characterised in that the open caisson is steel open caisson, and the open caisson includes:
The borehole wall, in both ends open and the column of inner hollow, its bottom terminal ends is provided with cutting shoe;
Shrouding, positioned at the bottom of the borehole wall;
Stiffening profile, it is arranged at the inwall of the borehole wall.
5. the installation method of ocean platform propeller according to claim 4, it is characterised in that the cross section of the caisson wall is in track type or ellipse, and outer wall and the harbour of the borehole wall have interval.
6. the installation method of ocean platform propeller according to claim 5, it is characterised in that the length direction of the open caisson is vertical with the harbour.
7. the installation method of ocean platform propeller according to claim 5, it is characterised in that the interval L of the borehole wall outer wall and harbour meets:L>D1+d2+d3+d4, wherein, d1 is the diameter of propeller, and d2 is that the installation site of propeller arrives the distance of ocean platform topside, d3 to refute beam, d4 for rubber back cushion width.
8. the installation method of ocean platform propeller according to claim 4, it is characterised in that the stiffening profile includes:It is horizontally placed on the perpendicular reinforcement that is willfully strong and being vertically installed in the borehole wall inwall of the borehole wall inwall.
9. the installation method of ocean platform propeller according to claim 4, it is characterised in that be respectively provided with anode loss protection on the borehole wall and the stiffening profile.
10. the installation method of ocean platform propeller according to claim 1, it is characterised in that it is described lifting propeller into the step of ocean platform bottom, in addition to:Crane gear and rigging are set on the ocean platform, and the propeller is risen to ocean platform bottom using crane gear and rigging.
11. the installation method of ocean platform propeller according to claim 10, it is characterised in that the installation site of the rigging through propeller on ocean platform is transferred in the open caisson, and the rigging is installed in place on the propeller below installation site.
12. the installation method of ocean platform propeller according to claim 1, it is characterised in that in the step of mobile ocean platform, move the ocean platform using winch and hawser, make the installation site of the ocean platform be located at the surface of open caisson.
CN201610344740.6A 2016-05-20 2016-05-20 The installation method of ocean platform propeller Pending CN107399409A (en)

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Application publication date: 20171128