CN210636411U - Sliding type installation system of offshore electrical platform - Google Patents
Sliding type installation system of offshore electrical platform Download PDFInfo
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- CN210636411U CN210636411U CN201921064535.XU CN201921064535U CN210636411U CN 210636411 U CN210636411 U CN 210636411U CN 201921064535 U CN201921064535 U CN 201921064535U CN 210636411 U CN210636411 U CN 210636411U
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Abstract
The utility model belongs to the ocean engineering field, especially marine wind power development field especially relate to a gliding mounting system of marine electric platform. The method has the following beneficial effects: 1) the method has the advantages that the method is wide in application range, can be used for mounting ultra-shallow water depth and ultra-large ocean platforms, has low restrictive requirements on transportation barges, upper blocks and lower blocks besides the necessary bearing capacity requirements of the supporting structure, does not need to change the classical structural style and the arrangement scheme of the platforms, widens the selection range of engineering optimization, and can effectively control the construction period and the engineering quantity. 2) The butt joint of the upper block and the lower block of the offshore platform can be stably, accurately and controllably operated by means of the rail and the SPMT vehicle set, the collision and inclination problems possibly occurring in a hoisting method or a floating-supporting method are avoided, and a butt joint buffer device at the connection position of the pile is not required to be arranged. 3) Each step is convenient to construct, the operation is simple, and the engineering economic benefit is remarkable.
Description
Technical Field
The utility model belongs to the ocean engineering field, especially marine wind power development field especially relate to a gliding mounting system of marine electric platform.
Background
With the continuous deepening of ocean development, more and more offshore platforms are put into use. In most engineering projects, the installation process of the platform is one of the decisive factors for determining the engineering economy, and has an important influence on the structural formula. The conventional installation method of the offshore platform is to use a floating crane transportation barge to hoist and place the upper block on a lower foundation structure (such as a jacket, a high pile cap and the like) which is constructed in advance, the related technology is mature, but the application of the hoisting method has the following limitations:
1) the large floating crane transportation barge has large draught and bottom contact risk under the condition of small water depth, and cannot be applied to offshore platform installation of a mudflat or an extremely shallow water depth sea area;
2) at present, the maximum hoisting weight of most floating crane transportation barges in the world is not more than 1 ten thousand tons, and the hoisting safety requirements of ultra-large oil and gas platforms, offshore converter stations and other ocean platforms of more than ten thousand tons cannot be met;
3) the current requirements of floating crane resources and window periods on projects to be built are very pretty, and the requirements of construction period and economy of large-scale ocean development cannot be met.
The above limitations are particularly evident in the field of offshore wind power development. At the present stage, the subsidy grade-withdrawing trend of offshore wind farm development is more and more obvious, and the related engineering technology is pushed down to accelerate the upgrading and updating steps. If a hoisting scheme must be adopted, part of the development project loses economy. In the aspect of installation technology of the offshore electric platform: under the condition of 1), the prior art can adopt the structural style of a split modular offshore booster station (patent publication No. CN 204126320U), and applies floating crane resources with smaller hoisting capacity but lower draft requirement, but the technology can not solve the problem that the station site is positioned in the condition of ultra-shallow water depth or mudflat, and the split structure is not equal to an integral structure in the aspects of bearing performance and construction process; under the condition of 2), the prior art adopts a floating method (patent publication No. CN 109056684A) to install, but barge resources capable of carrying out floating installation are also limited, and the related art has special requirements on slotting of a foundation support and collision buffering in the connection process of an upper block and a lower block, and the project design period and the project quantity are higher than those of a hoisting scheme.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is:
offshore platforms, in particular offshore electrical platforms, are in many cases not suitable to be installed by means of hoisting. The existing alternative technology has many other limited requirements, such as forced weakening of structural style, large-scale and special engineering transportation barge selection, no over-deep or over-shallow water depth condition, etc. Therefore, it is urgently needed to provide a safe, convenient and efficient sliding type installation system of an offshore electrical platform, which can meet the structural bearing performance of the upper and lower chunks in the whole processes of shipment, transportation, installation and in-service, and meanwhile, the obvious difference between the shape, arrangement and type of the chunks and the existing mature scheme is not required to be forced, i.e., the workload and the engineering quantity are not additionally increased, the limitation on the water depth of optional engineering transportation barges and sites is relaxed, and the feasibility and the economical efficiency of engineering are ensured.
To this end, the above object of the present invention is achieved by the following technical solutions:
a slip mounting system of an offshore electrical platform, the slip mounting system of the offshore electrical platform comprising an upper block, a double-deck support truss, an SPMT consist, a transport barge, a lower block and a fixed foundation of the offshore electrical platform; the upper block is temporarily supported by a double-layer support truss which is arranged on and supported by the SPMT consist, and the transportation barge is used for supporting and transporting the SPMT consist and the upper block and the double-layer support truss which are arranged on the SPMT consist; the lower block is disposed on a fixed foundation and is adapted to interface with the upper block and to support the upper block upwardly.
The utility model discloses when adopting above technical scheme, can also adopt or make up and adopt following technical scheme:
as the utility model discloses a preferred technical scheme, the lower part chunk is jacket or high pile cap, the upper surface of jacket or high pile cap sets up supporting track roof beam, the extending direction of track roof beam is the great owner axial of the planar scale along the lower part chunk, just the length of track roof beam, width and the double-deck support truss of upper portion chunk match.
As a preferred technical solution of the present invention, the lower block is provided with an attachment member, the attachment member is a J-shaped pipe or a ladder for climbing a boat, and the attachment member is uniformly arranged outside a vertical surface with a large dimension to avoid the collision risk generated by the transportation barge.
As the preferred technical scheme of the utility model, the marginal width of double-deck support truss is less than the interval of the inboard edge of king post connecting plate of the upper portion chunk that is connected with the lower part chunk.
As the utility model discloses a preferred technical scheme, be equipped with track supporting platform on the deck of transportation barge, track supporting platform's both ends are equipped with the fluting, grooved bottom is equipped with prefabricated spherical spacing structure, prefabricated spherical spacing structure cooperatees so that the on-the-spot is deployed fast with the trompil of connecting the lintel both ends, supplementary upper portion chunk, double-deck support truss, SPMT group of cars shift fast between transportation barge and lower part chunk.
As the utility model discloses a preferred technical scheme, double-deck support truss includes edge frame and middle frame, contact department between each node of edge frame, middle frame and the one deck girder of upper portion chunk is equipped with the lumber skid.
As the utility model discloses a preferred technical scheme, the both sides of skid are equipped with the triangle shelves, the upper and lower surface of triangle shelves spot weld respectively with the lower surface of the one deck girder of upper portion chunk and the upper surface of double-deck braced truss.
As the utility model discloses an optimal technical scheme, the downside of double-deck support truss is equipped with tripod formula ligature component, tripod formula ligature component's upper surface and double-deck support truss's the lower bottom surface of the edge frame's of edge frame and tripod formula ligature component and the main deck welding of transportation barge.
As the utility model discloses a preferred technical scheme, the below of the one deck girder of upper portion chunk is equipped with cast ligature component, the upper surface of cast ligature component and the lower surface welding of the one deck girder of upper portion chunk, the lower bottom surface of cast ligature component and the main deck welding of transportation barge.
The utility model provides a sliding mounting system of marine electric platform possesses following beneficial effect:
1) the method has the advantages that the method is wide in application range, can be used for mounting ultra-shallow water depth and ultra-large ocean platforms, has low restrictive requirements on transportation barges, upper blocks and lower blocks besides the necessary bearing capacity requirements of the supporting structure, does not need to change the classical structural style and the arrangement scheme of the platforms, widens the selection range of engineering optimization, and can effectively control the construction period and the engineering quantity.
2) The butt joint of the upper block and the lower block of the offshore platform can be stably, accurately and controllably operated by means of the rail and the SPMT vehicle set, the collision and inclination problems possibly occurring in a hoisting method or a floating-supporting method are avoided, and a butt joint buffer device at the connection position of the pile is not required to be arranged.
3) Each step is convenient to construct, the operation is simple, and the engineering economic benefit is remarkable.
Drawings
Fig. 1 is a three-dimensional schematic diagram of the sliding installation system of the offshore electrical platform in the sliding stage-loading process provided by the present invention.
Fig. 2 is a three-dimensional schematic view of the sliding installation system of the offshore electrical platform provided by the present invention when the upper block is butted with the lower block.
FIG. 3 is a plan perspective view of the upper block-double layer support truss-SPMT car set.
FIG. 4a is a cross-sectional view taken in the direction B-B or D-D in FIG. 3, and FIG. 4B is a cross-sectional view taken in the direction C-C in FIG. 3; FIG. 4c is a cross-sectional view taken in the direction of 1-1 or 5-5 in FIG. 3; FIG. 4d is a cross-sectional view taken in the direction 2-2 or 4-4 of FIG. 3; fig. 4e is a cross-sectional view in the direction 3-3 of fig. 3.
Figure 5 is a schematic view of the arrangement of the binding members.
Fig. 6 is a three-dimensional schematic view of a jacket.
FIG. 7a is a schematic illustration of the connection of the lintel; fig. 7b is an enlarged view of a portion of the connection to the lintel.
Fig. 8 is a schematic plan view of the transport barge as it is being skidded onto the deck.
Detailed Description
To further illustrate the contents, features and functions of the present invention, an embodiment of an offshore electrical platform is described, in which the lower module is a jacket, the upper module is 3000 tons, and the depth of water is about 4 m, and the following description is provided in conjunction with the accompanying drawings:
(1) as shown in fig. 1-2, the present embodiment comprises the following components: the offshore structure comprises 1-3000 ton offshore electrical platform upper module, 2-double-layer supporting trusses, 3-SPMT vehicle groups, 4-transportation barges and 5-jacket. The upper module 1 is built at quayside and is temporarily supported by a double-deck support truss 2, which is supported below the double-deck support truss 2 on horizontal brackets of an SPMT train 3. The upper block 1 and the double-layer support truss 2 are slid to a transportation barge 4 together from a construction site by an SPMT (spherical positioning machine) train set 3, the transportation barge 4 transports the upper block 1, the double-layer support truss 2 and the SPMT train set 3 to the site where the platform is located, and the jacket 5 is pre-installed and completely piled; after the transportation barge 4 is in place, the SPMT car group 3 lifts the upper chunk 1 and the double-layer support truss 2 to the maximum height and slides to a preset position on the jacket 5 from the right side of the jacket 5, and then the hydraulic lifting height of the SPMT car group 3 is reduced, so that the transportation barge 4 and the jacket 5 are butted and welded on site; and after welding is finished, the height of the hydraulic device of the SPMT car group 3 is restored to the original position, and the SPMT car group 3 together with the double-layer supporting truss 2 is returned to the transportation barge 4 to finish installation. In the embodiment, the maximum jacking height of the hydraulic device of the SPMT vehicle group 3 is 50 cm; in the process of sliding and loading, the automatic compensation is realized due to the uneven table top or the heave movement of the transportation barge, but the jacking height of a single device is not less than 35cm all the time; after the upper module 1, the double-layer support truss 2 and the SPMT vehicle group 3 slide and are put on the platform in place, the gap between the lower surface of the upper module 1 and the upper surface of the jacket 5 is 25 cm; after the butt joint is completed, the jacking height of each hydraulic device of the SPMT vehicle group 3 is not less than 10 cm.
(2) As shown in FIGS. 3-4: in this embodiment, the B \ D axis and 1\5 axis of the upper module 1 are the main axes for connecting the piles, the distance between 1-5 axes is greater than the distance between B-D axes, and the top elevation of the main beam 11 of the deck on one deckE t1= 16.00 m, height of deck girder 11 on one floorH tb1 = 0.8 m; the gap between the outer edge of an edge frame 21 of the double-layer supporting truss 2 and the inner edge of a main column welding seal plate 12 is 1 m, and the position of a middle frame 22 corresponds to the beam column node and the beam support node between B \ D shafts of a deck of the upper module 1; each of the upper layers of the edge frame 21 and the middle frame 22A standard skid 23 is arranged between the node and the deck girder 11, and the height of the standard skid 23H w = 0.3m, two sides of the standard skid 23 are provided with triangular shelves 24, and the upper and lower surfaces of the triangular shelves 24 are respectively spot-welded with the upper surface of the double-layer support truss 2 and the lower surface of the deck girder 11; the SPMT vehicle set 3 is provided with two vehicle sets 31 and 32, a track is parallel to a B-D shaft along the sliding direction, each vehicle set in the embodiment has 5 flatbeds, each flatbed has a front hydraulic jacking device and a rear hydraulic jacking device, the positions of the hydraulic jacking devices of the head-tail flatbeds are consistent with the positions of the two rows of frames of the head-tail flatbeds of the double-layer supporting truss 2 in the length direction, and the 3 middle flatbeds are respectively arranged in axial symmetry about 2, 3 and 4.
(3) In this embodiment, the upper surface of the upper wale of the jacket 5 is raisedE j1And the distance from the bottom surface of the vehicle to the lower surface of the double-layer supporting truss 2 when the lifting height of a hydraulic device of the SPMT vehicle group 3 is 10 cm is = 9.6mH 10If = 1.5 m, the height between the upper and lower surfaces of the double-layered truss 2 is calculated according to the formula of the technical solutionH bf And was 3.8 m.
(4) As shown in fig. 5, rail support platforms 41 and 42 are pre-installed in this embodiment transversely along the hull of the transport barge 4 with centerline spacing consistent with the centerline spacing of 31 and 32. A tripod type binding member 43 is arranged at the main node of the lower side of the edge frame 21, the lower bottom surface of the tripod type binding member 43 is welded with the main deck of the transportation barge 4, and the upper surface is welded with the lower surface of the edge frame 21; and a tubular binding member 44 is arranged at a main node where the B \ D axis of the deck main beam 11 on the first layer is intersected with the 2, 3 and 4 axes, the lower bottom surface of the tubular binding member 44 is welded with the main deck of the transportation barge 4, and the upper surface of the tubular binding member is welded with the lower surface of the deck main beam 11 on the first layer. After the transport barge 4 reaches the specified position, the tripod type banding members 43 and the tubular banding members 44 are cut off before the slide-up is performed.
(5) As shown in fig. 6, in the present embodiment, the structural style of the jacket 5 is substantially the same as that of the conventional jacket, but 4 sunk rail supporting trusses 51, 52, 53, 54, 51 and 52, and 53 and 54 are added, and the distance between the center lines of the two sunk rail supporting trusses and the coaxial wheels of each flat car is increasedThe center lines are spaced at the same distance and matched with the distances 31, 32, 41 and 42. The upper chord of each truss adopts a square tube structure, the upper surface of the upper chord is aligned with the upper horizontal cross bracing surface of the jacket 5, and the height isE j1= 9.6m, the total length is slightly greater than the total length of the double-layer support truss 2; the lower chord and the stay bar are all circular tube members, and the lower chord is only supported on the upper X-shaped stay bar of the shorter side vertical surface. The J-shaped pipe, the ship climbing ladder and other accessory members 55 are arranged on the outer side of the longer side vertical surface to avoid the collision problem in the sliding and landing process.
(6) As shown in fig. 7, the ends of the two sides of the track beams 41-42 and 51-54 are square pipes with the same type, the end parts are provided with grooves 61, the bottom of each square pipe is prefabricated with a spherical limiting structure 62, and each square pipe can be matched with an end opening 64 of a connecting lintel 63, so that the spot rapid deployment is facilitated, and the transfer of the upper block 1, the double-layer supporting truss 2 and the SPMT car group 3 between the transportation barge 4 and the jacket 5 is assisted.
(7) In the embodiment, the size design of each component and node of the auxiliary upper block 1, the double-layer supporting truss 2, the transportation barge 4 and the jacket 5 is controlled by the shipping, transportation and installation conditions, wherein the redistribution of the bearing counter force and the force transmission path caused by the suspension of 5 groups 10 of hydraulic devices of the SPMT car group 3 is considered in the shipping and installation conditions.
(8) As shown in fig. 8, a row of mooring piles 71 is pre-driven into the right side of the jacket 5. The transport barge 4 is parked on the mooring piles 71 after reaching a predetermined position without colliding with the jacket 5. The installation operation is carried out in a window period with good weather conditions, the transportation barge 4 is anchored with the mooring piles 71 and the seabed through the mooring lines 72, the three-way movement of the upper assembly block 1, the double-layer support truss 2, the SPMT vehicle group 3 and the transportation barge 4 in the sliding installation process is limited, and the heave movement of the transportation barge 4 is not more than 15 cm.
The above embodiments are merely preferred technical solutions of the present invention, and it should be understood by those skilled in the art that modifications or substitutions of technical solutions or parameters in the embodiments can be made without departing from the principles and essential conditions of the present invention, and all the modifications or substitutions should be covered within the protection scope of the present invention.
Claims (9)
1. A slip mounting system for an offshore electrical platform, comprising an upper block, a double-deck support truss, an SPMT consist, a transport barge, a lower block and a fixed foundation of the offshore electrical platform; the upper block is temporarily supported by a double-layer support truss which is arranged on and supported by the SPMT consist, and the transportation barge is used for supporting and transporting the SPMT consist and the upper block and the double-layer support truss which are arranged on the SPMT consist; the lower block is disposed on a fixed foundation and is adapted to interface with the upper block and to support the upper block upwardly.
2. Sliding installation system for an offshore electrical platform according to claim 1, wherein the lower block is a jacket or a high pile cap, the upper surface of which is provided with a matching rail beam, the extension direction of the rail beam is the major axis direction along the planar dimension of the lower block, and the length and width of the rail beam are matched with the double-layer supporting truss of the upper block.
3. Slip mounting system for electrical offshore platforms according to claim 1, wherein attachment means are provided on the lower block, said attachment means being J-tubes or boat climbers, said attachment means being arranged outside the vertical surface of larger dimensions to avoid collision risk from the transport barge.
4. Slip mounting system for an electrical offshore platform according to claim 1, wherein the double layer bracing truss has an edge width smaller than the spacing of the inner edge of the king post web of the upper block connected to the lower block.
5. Sliding installation system of electrical offshore platforms, according to claim 1, characterized in that on the deck of the transportation barge a rail support platform is provided, the rail support platform is provided with slots at both ends, the bottom of the slots is provided with pre-fabricated spherical limit structures, which cooperate with the openings connecting both ends of the lintel to facilitate rapid deployment in the field, assisting the rapid transfer of the upper block, the double-deck support truss, the SPMT train set between the transportation barge and the lower block.
6. Slip mounting system for an offshore electrical platform according to claim 1, wherein the double layer support truss comprises an edge frame and a middle frame, wherein skids are provided at the contact between each node of the edge frame and the middle frame and the deck girder of the upper block.
7. Sliding installation system of an offshore electrical platform according to claim 6, characterised in that the skid is provided with triangular steps on both sides, the upper and lower surfaces of which are spot welded to the lower surface of the one deck girder of the upper block and the upper surface of the double layer support truss, respectively.
8. Slip mounting system for electrical offshore platforms according to claim 6 wherein the lower side of the double support truss is provided with tripod lashing members, the upper surface of which are welded to the lower surface of the edge frames of the double support truss and the lower bottom surface of which are welded to the main deck of the transport barge.
9. Slip mounting system for electrical offshore platforms according to claim 1 wherein a tubular lashing member is provided below the one deck girder of the upper block, the upper surface of the tubular lashing member being welded to the lower surface of the one deck girder of the upper block and the lower bottom surface of the tubular lashing member being welded to the main deck of the transport barge.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921064535.XU CN210636411U (en) | 2019-07-09 | 2019-07-09 | Sliding type installation system of offshore electrical platform |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921064535.XU CN210636411U (en) | 2019-07-09 | 2019-07-09 | Sliding type installation system of offshore electrical platform |
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| CN210636411U true CN210636411U (en) | 2020-05-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110468816A (en) * | 2019-07-09 | 2019-11-19 | 中国电建集团华东勘测设计研究院有限公司 | A kind of sliding installation method and system of marine electrical platform |
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2019
- 2019-07-09 CN CN201921064535.XU patent/CN210636411U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110468816A (en) * | 2019-07-09 | 2019-11-19 | 中国电建集团华东勘测设计研究院有限公司 | A kind of sliding installation method and system of marine electrical platform |
| CN110468816B (en) * | 2019-07-09 | 2021-11-05 | 中国电建集团华东勘测设计研究院有限公司 | Sliding type installation method and system of offshore electrical platform |
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