Ice-resistant support block of marine engineering facility

FIELD: construction.

SUBSTANCE: ice-resistant support block of a marine engineering facility comprises a cylindrical shaft, a support unit and supporting braces. The shaft is made as hollow. The shaft is hingedly connected to supporting braces. The support unit comprises a support ring. The support ring is formed by at least three rectilinear pontoons. Pontoons are rigidly connected by their ends. The support ring is rigidly fixed to the cylindrical shaft by hollow radial spacers. Supporting braces are rigidly connected to the support ring by lower ends. Pontoons of the support ring, radial spacers, a cylindrical shaft and hollow supporting braces are made as capable of their floatability adjustment from positive to negative one.

EFFECT: invention provides for the possibility of serial construction, reduced labour intensiveness of installing a support block on site and its removal from soil, high repairability and capability of re-equipment in the dock.

8 cl, 6 dwg

 

The invention relates to marine engineering (offshore platforms) and can be used as an artificial reason for placing neftegazoprovodov equipment when solving problems of the development of the resources of the shelf.

The known reference block marine hydraulic structures, made in the form of end-to-end core spatial structure of steel rolled sections containing precast barrel, resting the lower end on the seabed, supporting braces pivotally connected to the middle part of the trunk (see US No. 4669917, CL EV 17/00, 1987). The platform is rigidly attached to the upper end of the barrel.

The disadvantages of this reference block offshore facilities offshore platforms can be attributed to the greater complexity of its design due to the presence of a large number of nodes and elements of its spatial structure. In addition, these structural features of the technical solution does not allow for ledostojkoj design.

Also known resistant jacket marine engineering structures, containing a hollow cylindrical barrel, the lower end of which is provided with a reference node, and a hollow support struts, pivotally connected to the barrel (see EN No. 2074926, IPC EV 17/00, 1992).

The disadvantages of this technical solution can be attributed dependent on the terrain quality "supporting effect of each of the supporting struts on the quality of their contact with the corresponding area of the bottom and the strength parameters of the bottom layer, in which is fixed the lower end of the supporting strut, while the structural elements of the bearing unit work isolated from each other, all together does not provide sufficient rigidity, which does not ensure trouble-free operation under the influence of the ice fields. In addition, installation of the claimed design is quite complicated and requires the use of powerful cranes.

The challenge which seeks the proposed solution is to increase the rigidity and simplify its installation.

The technical result is that it provides high rigidity by ensuring the consistency of all its elements with the formation of the spatial structure of interconnected elements with the education they are working hard triangular frames and simplifies its installation. In addition, it decreases the cost of installation design; the possibility of mass construction; reducing the complexity in the formulation of the reference block in place and when removed from the soil; high maintainability and the possibility of making a dock.

The problem is solved in that the resistant jacket marine engineering structures, containing a hollow cylindrical barrel, the lower end of which is provided with supporting the site, and hollow support struts, pivotally connected with the barrel, characterized in that the reference node contains a support ring formed of at least three rigidly connected by its ends straight pontoons, which in the plan given the shape of an isosceles trapezoid, with the support ring rigidly fastened to the walls of the cylindrical barrel, a hollow radial struts, the lower ends of the supporting braces rigidly connected with the support ring, wherein the longitudinal axis of the supporting braces and radial struts lie in the same vertical plane, with the pontoons supporting ring, the radial struts of the cylindrical barrel and the hollow support struts configured to regulate their buoyancy from positive to negative. In addition, the ends of the supporting braces, turned to the vertical shaft and the support ring, attached to the form, repeating surface areas in contact with structural elements. In addition, the swivel support braces with a cylindrical barrel made detachable. In addition, the hinges placed on the reinforcing ring belt attached to the cylindrical wall of the barrel at a depth greater than the average thickness of the ice fields on the setup of the reference block. In addition, the lower ends of the braces Zack is apleni on the wall of the support ring by welding. In addition, edges of end faces of the supporting braces, turned to a vertical shaft rigidly connected with turned to him surface, for example, by welding. In addition, in the cavities of the supporting braces placed additional longitudinal ballast compartments, cavities are symmetrical with respect to the shortest generatrix of the shell cross stay. In addition, a vertical shaft provided with a through longitudinal technological cavity isolated from the rest of its volume.

Comparison of the characteristics of the claimed solution with signs analogues and prototype demonstrates its compliance with the criterion of "novelty".

The characteristics of the characterizing portion of the claims, solves the following functional tasks:

Signs "...the reference node contains a support ring formed of at least three rigidly connected by its ends straight pontoons..." provide the perception of stress transmitted (or perceived) hollow supporting braces, while ensuring the stability of the working conditions of all braces and allows collaboration of nodes and elements of the reference block.

Signs indicating that straight pontoons "in the plan given the shape of an isosceles trapezoid"allow "areal" pairing ends straight pontoon is in and thereby ensure the durability of the support ring.

Signs "...support ring rigidly fastened to the walls of the cylindrical barrel hollow radial struts..." provide a rigid connection of the base of the support block and the support ring and characteristics "of the longitudinal axis of the supporting braces and radial struts lie in the same vertical plane" to ensure the formation of a "triangular truss"perceiving load (distributes them to the support ring)arising from the impact of the ice fields on the vertical shaft of the bearing unit.

Signs "...the lower ends of the supporting braces rigidly connected with the supporting ring..." increase the overall stiffness of the structure.

Signs "...the pontoons supporting ring, the radial struts of the cylindrical barrel and the hollow support struts are made with the ability to regulate their buoyancy from positive to negative..." provide transportation elements of the bearing unit towing, and their installation using ballasting - regulated (or pumping) of ballast water.

Signs of the second claim of the invention provide a snug fit to each other abutting surfaces of the elements of the reference block and accordingly the alignment and lower stress on the contacts braces.

The signs of the third paragraph of the formulas of the invention provide, if necessary (for example, in case of damage or need upgrading) the possibility of removing the supporting braces disassembly hinge (of course, after the liberation of edges connected by welding).

The signs of the fourth claim of the invention provide the ability to minimize the thickness of the remaining part of the wall of the cylindrical barrel (and its damage to the welding or cutting in the formation or destruction of the joints on the respective edges of the ends of the supporting struts and exclude the impact of the site of the ice fields.

The signs of the fifth paragraph of the claims specify possible the type of the rigid connection cross stay and support ring.

The signs of the sixth claim of the invention provide rigidity to the connection of the supporting braces with a cylindrical barrel, which increases the overall stiffness of the structure.

Signs of the seventh claim of the invention provide the possibility of such running trim of the braces to the installation in which they are oriented upwards "long" forms, which simplifies the Assembly of the construction (Assembly swivel cross stay and vertical shaft).

Signs of the eighth claim of the invention provide a free passage of the drilling tool through the vertical shaft.

The invention is illustrated che is the intellectual property, where figure 1 shows the side view of the ice-resistant support unit marine engineering structures, figure 2 - view of the anchor node, figure 3 shows the mounting of the unit in the dock, figure 4 shows the mounting of the unit on the water with sufficient depth to blend, figure 5 shows the process of mounting Assembly units afloat, figure 6 shows resistant jacket marine engineering structures after docking afloat.

In the drawings is shown a hollow cylindrical barrel 1, carrier 2, the supporting struts 3, the support ring 4, the pontoons 5, the spacer 6, the ballast compartments 7, the hinges 8, the annular zone 9. The drawings also shows the lugs 10 and 11.

Resistant support unit marine engineering structures (figure 1) contains a hollow cylindrical barrel 1, the lower end of which is provided with a reference node 2, and the hollow support struts 3, pivotally connected to the barrel 1. The vertical shaft 1 provided with a through longitudinal technological cavity isolated from the rest of its volume. Reference site 2 (figure 2) contains the support ring 4 formed of at least three rigidly connected by its ends straight pontoons 5, which in the plan given the shape of an isosceles trapezoid, with the support ring 4 is rigidly fastened to the walls of the cylindrical barrel 1 is a hollow radial struts 6. An integral part of the reference node pontoons 5, spacers 6) and the supporting struts 3 - tubular members of rectangular, round or other cross section. The lower ends of the support braces 3 are fixed on the wall of the support ring 4, for example, by welding. Edge ends of the support braces 3, converted to the vertical shaft 1 are rigidly connected with turned to him surface, for example, by welding. The ends of the support braces 3, converted to the vertical shaft 1 and the support ring 4, attached to the form, repeating surface areas in contact with structural elements. Wherein the longitudinal axis of the supporting braces 3 and radial spacers 6 lie in the same vertical plane. In the cavities of the supporting braces 3 posted by additional longitudinal ballast compartments 7, the cavity of which is symmetrical with respect to the shortest generatrix of the shell cross stay 3. The pontoons 5 support ring 4, the radial spacers 6, the cylindrical barrel 1 and the hollow support struts 3 are made with the ability to regulate their buoyancy from positive to negative. In the manufacture of a vertical shaft using technology used in the construction of the hull of the submarine. Other elements are simpler in construction and manufacturing technologies are not difficult. Swivel podderjivaushiy the braces 3 with a cylindrical barrel 1 is made detachable. The hinge 8 is placed on the reinforcing ring belt 9 mounted on the cylindrical wall of the barrel 1 at a depth greater than the average thickness of the ice fields on the setup support ring 4. Reinforcing ring belt 9 with the lugs 10, fixed on the outer surface of the vertical shaft.

Manufacture and installation of ice-resistant jacket marine engineering structures is as follows.

The construction of the mounting units is in the dock by known methods (figure 3). The first mounting unit includes a vertical shaft 1 and the reference node 2. The reference node 2 are in the form of a closed polyhedral ring 4 whose edges are made up of individual pontoons 5, the ends of which are rigidly fastened to each other, while the support ring 4 is rigidly fastened to the vertical shaft 1, the radial struts 6, made in the form of individual pontoons. As other mounting units used supporting struts 3. One end of each of the braces 3 provided with lugs 11, made with the possibility of the hinge fastening with eyelets 10 vertical shaft 1, and the other end of the perform with the possibility of a snug fit to the corresponding section of the support ring 4.

After the construction of the component parts of the bearing unit dock is filled with water, at the expense of own forces is oderjanie design emerge, and their take on the water with sufficient depth for docking (figure 4). In the process of mounting the first mounting unit prittlewell to give the longitudinal axis of the vertical shaft vertical position and bring its lugs 10 on the level above the sea surface, providing an opportunity swivel with lugs 11 of the supporting braces 3 (figure 5). Support braces 3 before installation Ballesteros with giving them a spatial position that provides the opportunity swivel their eyes 10 with the lugs 11 of the vertical shaft 1, ensuring the placement of braces afloat turning them up long forms (in this position the lugs braces protrude above the surface of the water).

Then (5) by ballasting pontoons 5 produce immersion, then the connection in the hinge connections 8 of the cylindrical barrel 1 and diagonal braces 3. After running swivel braces 3 with a vertical stem 1 pump out the ballast from the pontoons 5 support ring 4 and/or radial spacers 6 and/or vertical shaft 1, ensuring the convergence of the free ends of the braces 3 addressed to him by the surface area of the support ring 4, and provide contacts (preload) of the respective ends of the braces 3 support ring 4 by pdfsprite first mounting unit. Under the action the of gravity braces 3 are rotated in the hinges 8 and descend to the regular places (6). The speed and volume taken and pumped ballast must be designed in such a way that braces 3 fell on the support ring 4 smoothly. After pdfsprite support block 2 and oltuski sites support ring 4 attached to the braces 3, is rigidly fixed with braces in contact with the structural elements, for example, by welding, ensuring the rigidity of the whole structure of the reference block.

After rigid fixation of the braces 3 are in contact with them elements of design Ballesteros pontoons 5 gathered in this way the Assembly by providing transportation and lowered to the prepared area of the bottom.

The pontoons 5 and braces 3 are used for buoyancy and ballasting towing as ballast or cargo compartments in operation. Anchor block set on the ground its reference node 2. After Assembly of the bearing unit on a set platform (known) for process equipment. If necessary, anchor the unit by pumping ballast POPs up and then towed to a repair or to another place of use. The proposed design provides in comparison with reinforced concrete structures reduce costs; the possibility of mass construction; reduction of labor required for installation of the bearing unit on the field, and when removed from the soil; high is kind of maintainability and the possibility of making a dock.

1. Resistant support unit marine engineering structures, containing a hollow cylindrical barrel, the lower end of which is provided with a reference node, and a hollow support struts, pivotally connected with the barrel, wherein the reference node contains a support ring formed of at least three rigidly connected by its ends straight pontoons, which in the plan given the shape of an isosceles trapezoid, with the support ring rigidly fastened to the walls of the cylindrical barrel hollow radial struts, the lower ends of the supporting braces rigidly connected with the support ring, wherein the longitudinal axis of the supporting braces and radial struts lie in the same vertical plane, with the pontoons supporting ring, the radial struts of the cylindrical barrel and the hollow support struts are made with the ability to regulate their buoyancy from positive to negative.

2. Ice-bearing unit according to claim 1, characterized in that the ends of the supporting braces, turned to the vertical shaft and the support ring, attached to the form, repeating surface areas in contact with structural elements.

3. Ice-bearing unit according to claim 1, characterized in that the swivel support braces with a cylindrical barrel made of RA is yeminimi.

4. Ice-bearing unit according to claim 1, characterized in that the hinges are placed on the reinforcing ring belt attached to the cylindrical wall of the barrel at a depth greater than the average thickness of the ice fields on the setup of the reference block.

5. Ice-bearing unit according to claim 1, characterized in that the lower ends of the braces attached to the wall of the support ring by welding.

6. Ice-bearing unit according to claim 1, characterized in that the edges of the ends of the supporting braces, turned to a vertical shaft rigidly connected with turned to him surface, for example, by welding.

7. Ice-bearing unit according to claim 1, characterized in that the cavities of the supporting braces placed additional longitudinal ballast compartments, cavities are symmetrical with respect to the shortest generatrix of the shell cross stay.

8. Ice-bearing unit according to claim 1, characterized in that the vertical shaft provided with a through longitudinal technological cavity isolated from the rest of its volume.



 

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