CN114348192B - Assembled FRP concrete guy cable tower type damping platform and construction method thereof - Google Patents
Assembled FRP concrete guy cable tower type damping platform and construction method thereof Download PDFInfo
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- 239000004567 concrete Substances 0.000 title claims abstract description 196
- 238000013016 damping Methods 0.000 title claims abstract description 56
- 238000010276 construction Methods 0.000 title claims abstract description 39
- 239000000178 monomer Substances 0.000 claims abstract description 57
- 229910000831 Steel Inorganic materials 0.000 claims description 117
- 239000010959 steel Substances 0.000 claims description 117
- 239000010410 layer Substances 0.000 claims description 55
- 238000003466 welding Methods 0.000 claims description 24
- 239000011376 self-consolidating concrete Substances 0.000 claims description 17
- 230000000694 effects Effects 0.000 claims description 14
- 238000004804 winding Methods 0.000 claims description 13
- 230000035939 shock Effects 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 239000011229 interlayer Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 8
- 238000000605 extraction Methods 0.000 claims description 5
- 230000007797 corrosion Effects 0.000 abstract description 5
- 238000005260 corrosion Methods 0.000 abstract description 5
- 230000021715 photosynthesis, light harvesting Effects 0.000 abstract description 4
- 239000002131 composite material Substances 0.000 description 15
- 238000013461 design Methods 0.000 description 14
- 210000001503 joint Anatomy 0.000 description 7
- 238000010586 diagram Methods 0.000 description 3
- 238000005553 drilling Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002990 reinforced plastic Substances 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
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Abstract
The assembled FRP concrete guy cable tower type damping platform comprises an upper platform structure, an upper module monomer, a layered module connecting member, a plurality of lower module monomers and independent square foundations, wherein the upper module monomer and the lower module monomer are assembled to form an upper structure and a lower structure of a rigid connection system through integral nodes, ring-type dampers, FRP concrete combined upright columns, FRP concrete combined diagonal braces and FRP concrete combinations girder brace respectively; the upper platform structure consists of a damping box body and an FRP concrete platform cross brace, which are connected through a transverse damper; the upper platform structure is connected with the upper structure through stiffening ribs and column leg connectors; the lower layer structure is connected with the independent square foundation through the connecting sleeve. The fabricated FRP concrete guy cable tower type damping platform and the construction method thereof have the advantages of simple construction, high assembly efficiency, strong corrosion resistance, good energy dissipation and damping performance and repeated use.
Description
Technical field:
the invention relates to the technical field of building equipment, in particular to an assembled FRP concrete guy cable tower type damping platform and a construction method thereof.
The background technology is as follows:
The guyed tower ocean platform uses a working water area of 240m to 1000m, belongs to a deepwater ocean platform, has a simple structure and relatively small component size compared with a jacket platform, and has stronger adaptability to various environmental loads. As the working application water area is mostly deep sea, the environment is worse, and the platform components have strict requirements on strength, rigidity, stability and corrosion resistance, the guyed tower ocean platform has the characteristics of high manufacturing cost, great difficulty in design, construction and installation technology and the like. Under the current large background of long-term surplus deep water drilling resources, the high manufacturing cost and construction cost make the platform not applied in a large scale.
The invention comprises the following steps:
The invention aims to overcome the defects of the prior art, and provides a novel assembled FRP concrete combined guy cable tower type damping platform structure system which is simple and convenient to construct, high in assembly efficiency, strong in corrosion resistance, good in energy dissipation and damping performance and capable of being recycled and a construction method thereof.
In order to solve the problems existing in the background technology, the invention adopts the following technical scheme: the upper layer module single body and the lower layer module single body are assembled to form an upper layer structure and a lower layer structure of the rigid connection system through integral nodes, ring-type dampers, FRP concrete combined upright columns, FRP concrete combined diagonal braces and FRP concrete combinations girder brace respectively; the upper platform structure is composed of a damping box body and an FRP concrete platform cross brace, and the damping box body and the FRP concrete platform cross brace are connected through a lead rubber cushion layer to form a damping system; the upper platform structure is connected with the upper structure through stiffening ribs and column leg connectors; the lower layer structure is connected with the independent square foundation through the connecting sleeve.
The outer wall of the damping box body is provided with a plurality of transverse dampers which are uniformly distributed on the damping box body, and the damping box body is provided with FRP steel plates.
The integral type node comprises a vertical half pipe, an inclined half pipe and a horizontal half pipe, wherein the top and the bottom of the vertical half pipe are respectively connected with an inner pipe through a ring-type damper, a base plate is arranged on the outer wall of the inner pipe, a high-strength bolt is arranged on the outer wall of the base plate and connected with an FRP concrete combined upright column, the inner pipe is inserted into the FRP concrete combined upright column, and a connecting lug is arranged at the end part of the FRP concrete combined upright column; the side wall of the vertical half pipe is provided with an inclined half pipe and a transverse half pipe, and the inclined half pipe and the transverse half pipe are respectively connected with an FRP concrete combined diagonal bracing and an FRP concrete combined girder brace.
The layered module connecting component comprises a first C-shaped sleeve, a second C-shaped sleeve and a hydraulic fixer, wherein the first C-shaped sleeve is connected with the second C-shaped sleeve through the hydraulic fixer, the upper part of the first C-shaped sleeve and the lower part of the second C-shaped sleeve are respectively connected with an inner pipe through a ring-type damper, a backing plate is arranged on the outer wall of the inner pipe, a high-strength bolt is arranged on the outer wall of the backing plate, the high-strength bolt is connected with an FRP concrete combined upright column, the inner pipe is inserted into the FRP concrete combined upright column, and a connecting lug is arranged at the end part of the FRP concrete combined upright column; an inclined half pipe and a transverse half pipe are arranged on one side wall of the C-shaped sleeve, the inclined half pipe and the transverse half pipe are respectively connected with an FRP concrete combined diagonal bracing and an FRP concrete combination girder brace, and the inner pipe with the conical head is arranged at the bottom of the C-shaped sleeve; the second C-shaped sleeve is internally provided with a rubber cushion layer, the outer wall of the second C-shaped sleeve is provided with an inclined half pipe and a transverse half pipe, and the inclined half pipe and the transverse half pipe are respectively connected with an FRP concrete combination diagonal bracing and an FRP concrete combination girder brace.
The lower structure-foundation connecting member comprises a connecting sleeve, wherein an FRP (fiber reinforce Plastic) inner pipe with a conical head arranged at the bottom of the lower structure is inserted into the connecting sleeve, the connecting sleeve is fixed on an independent square foundation, the independent square foundation comprises a concrete base and a steel plate foundation plate, and the steel plate foundation plate is arranged on four circles of outer walls of the concrete base.
The upper platform structure comprises a plurality of column leg connectors, platform upright posts and platform cross braces, wherein the platform cross braces are arranged on the platform upright posts in a staggered mode, the column leg connectors are provided with platform cross brace junction parts, the column leg connectors are connected with FRP concrete combined upright posts, and stiffening ribs are arranged at the column leg connectors.
The FRP concrete combined upright post, the FRP concrete combined diagonal bracing and the FRP concrete combination girder brace are respectively divided into three forms, wherein the first form is core concrete, steel pipes and FRP pipes from inside to outside in sequence, the second form is core concrete, steel pipes, interlayer concrete and FRP pipes from inside to outside in sequence, and the third form is steel pipes, interlayer concrete and FRP pipes from inside to outside in sequence.
The construction method of the FRP concrete combined upright post comprises the steps of wrapping a steel pipe with an outer seamless winding type FRP pipe, fixing inner pipes with the radius equal to the radius of the inner wall of the steel pipe at two ends of the steel pipe through transverse high-strength bolts, extending out of the designed length, sealing the ports of the inner pipes at the lower part of the steel pipe, arranging a pouring port at the top end of the inner pipe at the upper part of the steel pipe, pouring self-compacting concrete into the FRP steel pipe, leveling the height of the poured concrete in the FRP steel pipe with the top of the inner pipe, and welding connecting lugs at two end surfaces of the steel pipe after the concrete is formed; according to the FRP concrete combination girder brace construction method, firstly, a steel pipe is wrapped by an outer seamless winding type FRP pipe, then inner pipes with the radius of the transverse high-strength bolts being the radius of the inner wall of the steel pipe extend out of the designed length, the port of the inner pipe at one end of the steel pipe is sealed, the top end of the inner pipe at the other end is provided with a pouring port, self-compacting concrete is poured into the FRP steel pipe, the height of the poured concrete in the FRP steel pipe is level with the top of the inner pipe, and after the concrete is formed, connecting lugs are welded at the two end surfaces of the steel pipe; according to the construction method of the integral type node, firstly, a multi-plane node is designed according to design requirements, an outer layer seamless winding type FRP pipe is used for wrapping the outer wall of the multi-plane node, embedded spaces are reserved and sealed at the ends of a vertical half pipe, a horizontal half pipe and an inclined half pipe of a single node, connecting lugs are welded at the end faces of the half pipes, and finally, self-compacting concrete is poured into pouring holes to fill the inner space of the multi-plane node.
According to the construction method of the lower structure, firstly, FRP concrete combination girder brace prefabricated in a factory and FRP concrete combination upright posts are sleeved into a ring-type damper, and are connected and fixed through high-strength bolts to form a basic truss unit structure, and 5-6 basic truss units form layered module monomers of a truss; then welding a second C-shaped sleeve at the upper end of each set layering module single upright post, and placing a rubber gasket into the second C-shaped sleeve; c-shaped sleeves I are welded at the lower end of each set layering module single upright post, and a hydraulic fixer is installed and fixed on the side wall of each upright post through a high-strength bolt; the upper end face of a layered module single upright post of the top layer in truss layering forms a connecting lug with a bolt hole and an inner pipe with a projected design length, self-compacting concrete is poured into the inner pipe, and the height of the concrete is equal to the top of the inner pipe; forming a conical head inner pipe with a bolt hole connecting lug and a welding design length on the lower end surface of a single column of the layered module of the truss layered middle-bottom layer, and pouring self-compacting concrete into the inner pipe until the conical head inner pipe is filled; according to the superstructure construction method, firstly, prefabricated FRP concrete combination girder brace and FRP concrete combination upright posts in a factory are sleeved into a ring-type damper, and are connected and fixed through high-strength bolts to form a platform cross brace structure; and the bottom of the platform transverse support is welded with a column leg connecting port according to the design requirement.
Firstly, excavating an oil extraction site to a corresponding depth, leveling, placing a template and pouring an independent square foundation, wherein a steel foundation plate with a connecting sleeve is arranged at the upper part of the foundation; after the foundation is formed, the truss layering module monomers prefabricated in the factory are arranged in sequence and transported to corresponding offshore sites; secondly, sinking a layered module monomer with the length of a middle-bottom layer of truss layering at a specified position, butting an inner pipe with a conical head at the lower end of a layered module monomer with 4 connecting sleeves of an independent square foundation, and then screwing high-strength bolts on the connecting lugs by an underwater robot; sequentially immersing the layered module monomers into water, completely butting an inner pipe with a conical head at the lower end of the upper module monomer with a C-shaped sleeve of the lower module monomer, compacting an interface through a hydraulic fixer, and screwing high-strength bolts on the connecting lugs by using an underwater robot; when the layered module monomer is assembled to the upper module monomer, a mooring rope is tied at the connection part of the mooring rope, and a mooring weight at the lower end of the mooring rope is placed at a designed position to form a fixing effect on the tower structure; and finally, lifting the upper structure, butting the column leg connecting ports at the lower part of the platform with the inner tubes of the upper module units of the lower structure, and connecting and welding and fixing the column leg connecting ports through high-strength bolts on the connecting lugs.
The invention has the following advantages:
1. According to the invention, the FRP concrete structure is applied to the field of offshore platforms, so that the corrosion resistance of the platform structure is greatly improved by the FRP layer, the later maintenance cost of the components is reduced, and the service life of the structure is prolonged; the steel pipe layer restrains the deformation of the inner layer concrete, and fully plays the role of the strength of the concrete; the concrete layer in the member improves the overall rigidity of the structure and reduces the deformation of the lower truss structure under the action of underwater load.
2. Through setting up annular attenuator, girder brace, stand deformation performance under the effect of loading has improved, simultaneously, has improved the durability that the member used, and the structure energy dissipation shock attenuation's ability has wholly obtained the promotion.
3. The lower truss connection mode of the assembled FRP combined guy cable tower type damping platform structure system is formed by connecting the upright post and girder brace by the integral node prefabricated in a factory, and the construction process of the guy cable tower type damping platform structure system is simplified by the mode of inner pipe nested connection and high-strength bolt connection and fixation; the connecting part resists shearing force through the inner pipe, and the high-strength bolt resists tensile force, so that the requirements of strength and deformation of the structure are met; when in offshore site construction, the lower truss structure can simply and rapidly hoist and construct layered module monomers, assemble and butt joint the layered module monomers in sequence, screw down screws by using an underwater robot, and the construction process of the sequential butt joint is simple, short in time consumption and pollution-free; when the platform needs to be disassembled, only layered module monomers need to be disassembled in sequence and transported away, and after being transferred to other destinations, the platform can be directly installed after the foundation is poured and molded, and the platform structure can be disassembled at any time and assembled at any time, so that the effects of recycling and reducing cost are achieved.
4. According to the novel damping platform, the novel damping platform is adopted, the damping box body, the platform cross brace and the lower truss structure are separated by the rubber cushion layer and the transverse damper, so that the vibration effect of the upper damping box body on the platform in stormy waves is reduced, and the stability of the drilling platform and the comfortableness of workers in the working process are ensured.
Description of the drawings:
FIG. 1 is a schematic cross-sectional view of a shock absorbing housing + damper + of the present invention;
FIG. 2 is a schematic view of a platform cross brace + rubber cushion of the present invention;
FIG. 3 is a top-bottom schematic view of the platform cross-brace of the present invention;
FIG. 4 is a schematic cross-sectional view of a vibration damping platform according to the present invention;
FIG. 5 is a schematic top view of the upper module monomer of the present invention;
FIG. 6 is a schematic diagram of a layered module monomer of the present invention;
FIG. 7 is a schematic diagram of a hierarchical module connection of the present invention;
FIG. 8 is a schematic view of a substructure-foundation connection of the present invention;
FIG. 9 is a schematic diagram of a freestanding square foundation in accordance with the present invention;
FIG. 10 is a schematic view of a composite truss connection of the present invention;
FIG. 11 is a schematic view of a damper and high strength bolt shim plate of the present invention;
FIG. 12 is a schematic view of a layered module connection member of the present invention;
FIG. 13 is a schematic cross-sectional view of the FRP concrete structure of the invention;
FIG. 14 is a schematic plan view of an assembled guy cable tower shock platform of the present invention.
Reference numerals illustrate: 1 lead rubber cushion layer, 2 transverse dampers, 3 damping platforms, 4 stiffening ribs, 5, mooring rope connection points, 6 mooring ropes, 7FRP concrete truss structure, 8 ring dampers, 9 connecting sleeves, 10 independent square foundations, 11 mooring weights, 12FRP steel plates, 13 damping boxes, 14 steel plates, 15FRP concrete composite trusses, 16C-shaped sleeve two, 17 layered module monomers, 18 integral joints, 19FRP concrete composite girder brace, 20 basic truss units, 21C-shaped sleeve one, 22FRP tapered head inner pipes, 23 hydraulic retainers, 24 connecting lugs, 25 inner pipes, 26 bolt holes one, 27 backing plates, 28 transverse high-strength bolts, 29 bolt holes two, 30 vertical half pipes, 31FRP concrete composite uprights, 32 oblique half pipes, 33 transverse half pipes, 34FRP concrete composite diagonal braces, 35 upper layer module monomers, 36 layered module connecting members, 37 lower layer module monomers, 38 steel plate foundation plates, 39 concrete bases, 40 column leg connection ports, 41 column truss joints, 42 FRP upright posts, 43 FRP outer layer concrete platforms, 45, 46 FRP outer layer concrete piles, 49, 48 interlayer concrete, 48 and 48FRP core concrete intermediate layers
The specific embodiment is as follows:
Referring to the drawings, the present invention specifically adopts the following embodiments: the upper layer module unit 35 and the lower layer module unit 37 are assembled through integral nodes 18, ring-type dampers 8, FRP concrete combined upright posts 31, FRP concrete combined diagonal braces 34 and FRP concrete combined girder brace to form an upper layer structure and a lower layer structure of the rigid connection system; the upper platform structure is composed of a damping box body 13 and an FRP concrete platform transverse strut 44, and the damping box body 13 and the FRP concrete platform transverse strut 44 are connected through a lead rubber cushion layer 1 to form a damping system; the upper platform structure is connected with the upper structure through stiffening ribs 4 and column leg connecting ports 40; the substructure is connected to an independent square foundation 10 by means of a connecting sleeve 9. The outer wall of the damping box body 13 is provided with a plurality of transverse dampers 2, the transverse dampers 2 are uniformly distributed on the damping box body 13, and the damping box body 13 is provided with an FRP steel plate 12. The integral type node 18 comprises a vertical half pipe 30, an inclined half pipe 32 and a transverse half pipe 33, wherein the top and the bottom of the vertical half pipe 30 are respectively connected with an inner pipe 25 through a ring damper 8, a backing plate 27 is arranged on the outer wall of the inner pipe 25, a transverse high-strength bolt 28 is arranged on the outer wall of the backing plate 27, the transverse high-strength bolt 28 is connected with an FRP concrete combined upright 31, the inner pipe 25 is inserted into the FRP concrete combined upright 31, and a connecting lug 24 is arranged at the end part of the FRP concrete combined upright 31; the side wall of the vertical half pipe 30 is provided with an inclined half pipe 32 and a transverse half pipe 33, and the inclined half pipe 32 and the transverse half pipe 33 are respectively connected with an FRP concrete combination diagonal bracing 34 and an FRP concrete combination girder brace. The layered module connecting member 36 comprises a first C-shaped sleeve 21, a second C-shaped sleeve 16 and a hydraulic fixer 23, wherein the first C-shaped sleeve 21 is connected with the second C-shaped sleeve 16 through the hydraulic fixer 23, the upper part of the first C-shaped sleeve 21 and the lower part of the second C-shaped sleeve 16 are respectively connected with the inner pipe 25 through the ring-type damper 8, a backing plate 27 is arranged on the outer wall of the inner pipe 25, a transverse high-strength bolt 28 is arranged on the outer wall of the backing plate 27, the transverse high-strength bolt 28 is connected with the FRP concrete combined upright 31, the inner pipe 25 is inserted into the FRP concrete combined upright 31, and the end part of the FRP concrete combined upright 31 is provided with a connecting lug 24; the side wall of the first C-shaped sleeve 21 is provided with an inclined half pipe 32 and a transverse half pipe 33, the inclined half pipe 32 and the transverse half pipe 33 are respectively connected with an FRP concrete combined diagonal bracing 34 and an FRP concrete combination girder brace 19, and the bottom of the first C-shaped sleeve 21 is provided with an FRP inner pipe with a conical head 22; the outer wall of the second C-shaped sleeve 16 is provided with an inclined half pipe 32 and a transverse half pipe 33, and the inclined half pipe 32 and the transverse half pipe 33 are respectively connected with an FRP concrete combination diagonal bracing 34 and an FRP concrete combination girder brace. The FRP inner pipe 22 with the conical head, which is arranged at the bottom of the lower layer structure, is inserted into the connecting sleeve 9, the connecting sleeve 9 is fixed on the independent square foundation 10, the independent square foundation 10 comprises a concrete base 39 and a steel plate foundation plate 38, and the steel plate foundation plate 38 is arranged on the outer walls of four circles of the concrete base 39. The upper platform structure comprises a plurality of column leg connecting ports 40, truss upright posts 42 and platform transverse struts 43, wherein the platform transverse struts 43 are arranged on the truss upright posts 42 in a staggered mode, the column leg connecting ports 40 are provided with platform transverse struts 43 at the junction, the column leg connecting ports 40 are connected with FRP concrete combined upright posts 31, and stiffening ribs 4 are arranged at the column leg connecting ports 40. The FRP concrete combined upright column 31, the FRP concrete combined diagonal bracing 34 and the FRP concrete combination girder brace are respectively divided into three forms, wherein the first form is a core concrete 46, a steel pipe 47 and an FRP pipe 48 in sequence from inside to outside, the second form is a core concrete 46, a steel pipe 47, an interlayer concrete 49 and an FRP pipe 48 in sequence from inside to outside, and the third form is a steel pipe 47, an interlayer concrete 49 and an FRP pipe 48 in sequence from inside to outside. The construction method of the FRP concrete combined column 31 comprises the steps of wrapping a steel pipe 47 by using a wound FRP pipe 48 with a seamless outer layer, fixing inner pipes with the radius of the inner wall of the steel pipe at two ends of the steel pipe through transverse high-strength bolts, extending out of the designed length, sealing the ports of the inner pipes at the lower part of the steel pipe, forming a pouring opening at the top end of the inner pipe at the upper part, pouring self-compacting concrete into the FRP steel pipe, leveling the height of the poured concrete in the FRP steel pipe with the top of the inner pipe, and welding connecting lugs at two end surfaces of the steel pipe after the concrete is formed; according to the construction method of the FRP concrete combination girder brace, firstly, a steel pipe 47 is wrapped by an outer seamless winding type FRP pipe 48, then two ends of the steel pipe extend out of an inner pipe with the radius of the inner wall of the steel pipe through transverse high-strength bolts, the port of the inner pipe at one end of the steel pipe is sealed, the top end of the inner pipe at the other end of the steel pipe is provided with a pouring port, self-compacting concrete is poured into the FRP steel pipe, the height of the poured concrete in the FRP steel pipe is level with the top of the inner pipe, and after the concrete is formed, connecting lugs are welded at two end surfaces of the steel pipe; according to the construction method of the integral type node 18, firstly, a multi-plane node is designed according to design requirements, the outer layer seamless winding type FRP pipe is used for wrapping the outer wall of the multi-plane node, the ends of the vertical half pipe, the transverse half pipe and the inclined half pipe of the single node are reserved with embedded spaces and sealed, the end faces of the half pipes are welded with connecting lugs, and finally, self-compacting concrete is poured into pouring holes to fill the inner space of the multi-plane node. According to the construction method of the lower structure, firstly, FRP concrete combination girder brace prefabricated in a factory and FRP concrete combination upright posts are sleeved into a ring-type damper, and are connected and fixed through high-strength bolts to form a basic truss unit structure, and 5-6 basic truss units form layered module monomers of a truss; then welding a second C-shaped sleeve at the upper end of each set layering module single upright post, and placing a rubber gasket into the second C-shaped sleeve; c-shaped sleeves I are welded at the lower end of each set layering module single upright post, and a hydraulic fixer is installed and fixed on the side wall of each upright post through a high-strength bolt; the upper end face of a layered module single upright post of the top layer in truss layering forms a connecting lug with a bolt hole and an inner pipe with a projected design length, self-compacting concrete is poured into the inner pipe, and the height of the concrete is equal to the top of the inner pipe; forming a conical head inner pipe with a bolt hole connecting lug and a welding design length on the lower end surface of a single column of the layered module of the truss layered middle-bottom layer, and pouring self-compacting concrete into the inner pipe until the conical head inner pipe is filled; according to the superstructure construction method, firstly, prefabricated FRP concrete combination girder brace and FRP concrete combination upright posts in a factory are sleeved into a ring-type damper, and are connected and fixed through high-strength bolts to form a platform cross brace structure; and the bottom of the platform transverse support is welded with a column leg connecting port according to the design requirement. Firstly, excavating an oil extraction site to a corresponding depth, leveling, placing a template and pouring an independent square foundation, wherein a steel foundation plate with a connecting sleeve is arranged at the upper part of the foundation; after the foundation is formed, the truss layering module monomers prefabricated in the factory are arranged in sequence and transported to corresponding offshore sites; secondly, sinking a layered module monomer with the length of a middle-bottom layer of truss layering at a specified position, butting an inner pipe with a conical head at the lower end of a layered module monomer with 4 connecting sleeves of an independent square foundation, and then screwing high-strength bolts on the connecting lugs by an underwater robot; sequentially immersing the layered module monomers into water, completely butting an inner pipe with a conical head at the lower end of the upper module monomer with a C-shaped sleeve of the lower module monomer, compacting an interface through a hydraulic fixer, and screwing high-strength bolts on the connecting lugs by using an underwater robot; when the layered module monomer is assembled to the upper module monomer, a mooring rope 6 is tied at a mooring rope connecting point 5, and a mooring weight 11 at the lower end of the mooring rope 6 is placed at a designed position to form a fixing effect on the tower structure; and finally, lifting the upper structure, butting the column leg connecting ports at the lower part of the platform with the inner tubes of the upper module units of the lower structure, and connecting and welding and fixing the column leg connecting ports through high-strength bolts on the connecting lugs.
The upper platform structure of the assembled FRP concrete combined guyed tower platform is a two-layer multi-row FRP concrete combined truss structure and a damping box body structure, and the lower truss structure part of the assembled FRP concrete combined guyed tower platform is a tower structure with a square section; the end part of the FRP concrete combined upright post and the end part of the FRP concrete combined girder brace are provided with connecting lugs with bolt holes, and the end part extending inner pipe penetrates through the ring-type damper and then is embedded into the node half pipe and is fixedly connected through high-strength bolts; the integral multi-plane node is formed by intersecting a transverse half pipe, a vertical half pipe and an inclined half pipe, the extending end surface of the half pipe forms a connecting lug, and the connecting lug is provided with a bolt hole; the lower truss structure is composed of a plurality of layered module monomers, and the upper layer module monomers and the lower layer module monomers are connected through truss layered module connecting members and are connected through longitudinal high-strength bolts.
The FRP concrete composite structure forms in the scheme comprise and are not limited to the following modes: comprises an FRP pipe, a steel pipe and core concrete; the concrete consists of an FRP pipe, interlayer concrete, a steel pipe and core concrete; the reinforced plastic composite material consists of an FRP pipe, sandwich concrete and a steel pipe; wherein, the FRP outer layer in the FRP concrete composite structure can prevent the steel pipe and the concrete of the inner layer of the rod piece from being corroded by seawater; the steel pipe and the FRP layer have a constraint deformation effect on the concrete layer; the concrete layer plays a great role in improving the structural rigidity and strength of the rod piece.
The half pipe of the integral node in the scheme reserves the space for nesting the inner pipe; the half pipe extension end surface of the integral node forms a connecting lug and is provided with a bolt hole; the radius of the section of the inner pipe is the radius of the inner wall of the half pipe of the single node.
In the above scheme, the FRP steel tube concrete composite column combined with the ring type damper and the FRP concrete composite girder brace combined with the ring type damper are provided with prefabricated inner tubes at the ends thereof, the inner tubes are fixed by transverse high-strength bolts on the side walls, the radius of the inner tubes is the radius of the inner wall of the FRP steel tube concrete composite column combined with the ring type damper and the FRP concrete composite girder brace combined with the ring type damper, and the inner tubes penetrate through the ring type damper and are embedded into the single node half tubes, and are fixedly connected by the high-strength bolts.
In the scheme, the lower structure tower structure is formed by a plurality of truss layering modules, wherein 5-6 basic truss units are connected to form a layering module monomer with the height of 30 meters. The layered module monomer is easy to hoist and construct, and can be used for fast hoisting and butt-jointing and fixing the underwater structure during offshore assembly.
In the scheme, the truss layering module connecting member consists of a hydraulic fixer, a C-shaped sleeve 1, a C-shaped sleeve 2, a rubber gasket, an FRP concrete inner pipe with a conical head and a high-strength bolt, wherein the C-shaped sleeve 1 and the C-shaped sleeve 2 are respectively welded and fixed at two ends of a vertical column of an upper truss layer and a lower truss layer, the hydraulic fixer is arranged on the side wall of the single vertical column of the upper truss layering, the bottom of the single vertical column extends out of the FRP inner pipe with the conical head, and the rubber gasket is arranged at the top of the single vertical column of the lower truss layering, so that the sealing effect is achieved on the connecting section of the vertical column and the adverse effect of impact is relieved; the truss structures of the upper layer-lower layer layering modules are connected in a nested mode through inner pipes, compacted through hydraulic retainers and then fixed through longitudinal high-strength bolt connection.
The upper platform structure-lower truss structure connecting part of the scheme comprises column leg connecting ports, stiffening ribs, connecting lugs and inner pipes, the radius of the inner pipes is the radius of the inner walls of the column leg connecting ports, the stiffening ribs are distributed in a cross shape along the outer walls of the column leg connecting ports, and the connecting parts are nested by the inner pipes and are fixedly connected through longitudinal high-strength bolts.
The upper platform structure part of the scheme comprises an FRP concrete truss structure platform and a damping box body, wherein the damping box body is arranged in the middle of a platform transverse strut, is connected with a lead rubber pad through a transverse damper and is fixedly connected with the lead rubber pad through a high-strength bolt.
The lower truss structure-foundation connecting part in the scheme is composed of an independent square foundation with a connecting sleeve and an FRP concrete inner pipe with a conical head, is connected in an inner pipe nesting mode, and is then connected and fixed through a longitudinal high-strength bolt.
The construction method of the assembled FRP concrete combined guy cable tower type damping platform structure comprises the following steps:
The construction method of the prefabricated upright post of the FRP concrete composite structure comprises the following steps: firstly, wrapping a steel pipe by using a winding type FRP pipe with a seamless outer layer, then arranging inner pipes with the radius of the inner wall of the steel pipe at two ends of the steel pipe, extending out of the designed length, and connecting and fixing the steel pipe by using a transverse high-strength bolt on the side wall of the steel pipe. Sealing the port of the inner pipe at the lower part of the steel pipe, forming a pouring port at the top end of the inner pipe at the upper part, pouring self-compacting concrete into the FRP steel pipe, leveling the poured concrete in the FRP steel pipe with the top of the inner pipe, and welding connecting lugs at the two end surfaces of the steel pipe after the concrete is formed; according to the construction method for prefabricating girder brace of the FRP concrete combined structure, firstly, a steel pipe is wrapped by an outer seamless winding type FRP pipe, then inner pipes with the radius being the radius of the inner wall of the steel pipe are arranged at two ends of the steel pipe, the designed length is extended, and the steel pipe is fixedly connected through transverse high-strength bolts on the side wall of the steel pipe. The port of the inner tube at one end of the steel tube is sealed, the top of the inner tube at the other end is provided with a pouring port, self-compacting concrete is poured into the FRP steel tube, the height of the poured concrete in the FRP steel tube is equal to the top of the inner tube, and after the concrete is formed, connecting lugs are welded at the two end surfaces of the steel tube.
The construction method of the prefabricated integral multi-plane node of the FRP concrete composite structure comprises the following steps: firstly, designing a multi-plane node according to design requirements, wrapping the outer wall of the multi-plane node by using an outer seamless winding FRP pipe, reserving embedded spaces at the ends of a vertical half pipe, a horizontal half pipe and an inclined half pipe of a single node, sealing, and welding connecting lugs at the end surfaces of the half pipes. And finally, pouring self-compacting concrete into the pouring holes until the inner space of the multi-plane node is filled.
The construction method of the upper structure of the assembled FRP combined guy cable tower platform structure comprises the following steps: firstly, sheathing a ring-type damper into a factory prefabricated FRP concrete combination girder brace and an FRP concrete combination upright column, connecting and fixing the FRP integrated multi-plane nodes through high-strength bolts to form a platform cross brace structure, and welding column leg connectors at the bottom of the platform cross brace according to design requirements; the damping box body platform is formed by welding steel plates into an integrated box body, high-strength bolt holes are arranged at the positions where the dampers are connected, and the damping box body is fixedly connected with the transverse dampers, the lead rubber pads and the platform cross braces through the high-strength bolts, so that the damping platform is formed.
The construction method of the assembled FRP combined guy cable tower type damping platform structure system comprises the following steps: excavating an oil extraction site to a corresponding depth, leveling, placing a template and pouring an independent square foundation, wherein a steel foundation plate with a connecting sleeve is arranged on the upper part of the foundation. After the foundation is formed, the truss layering module single bodies prefabricated in the factory are arranged in sequence and transported to corresponding places on the sea. Firstly, sinking a lower module monomer in truss layering at a specified position, butting an inner pipe with a conical head at the lower end of the lower module monomer with 4 connecting sleeves of an independent square foundation, and then screwing high-strength bolts on connecting lugs by an underwater robot; then sequentially sinking the layered module monomers into water, and screwing high-strength bolts on the connecting lugs by using an underwater robot; when the layered module is assembled to an upper module monomer, a mooring rope is tied at the connection part of the mooring rope, and a mooring weight at the lower end of the mooring rope is placed at a designed position to form a fixing effect on the tower structure; and finally, lifting the upper platform structure, butting the lower column leg connecting ports of the platform with the upper module single inner pipes of the lower structure, and connecting and welding the upper column leg connecting ports with the upper module single inner pipes through high-strength bolts on the connecting lugs.
Example 1:
as shown in fig. 10, 11 and 13, the novel assembled FRP concrete combined guyed tower platform structure system is composed of prefabricated FRP concrete combined upright posts, FRP concrete combination girder brace and FRP integral type multi-plane nodes, wherein the integral type multi-plane nodes are composed of transverse half pipes, vertical half pipes and inclined half pipes which are intersected, connecting lugs are formed on the extending end surfaces, and bolt holes are formed on the connecting lugs; the FRP concrete combined upright post and the FRP concrete combined girder brace are provided with connecting lugs with bolt holes, and an inner pipe extending from the end part penetrates through the ring-type damper and then is embedded into the node half pipe and is fixedly connected through high-strength bolts. As shown in fig. 2, the component nodes of the superstructure platform cross-brace are all formed in combination in the manner described above.
The construction method in this embodiment is as follows:
The construction method of the prefabricated integral type multi-plane node comprises the steps of firstly designing the multi-plane node according to design requirements, wrapping the outer wall of the multi-plane node by using an outer seamless winding FRP pipe, reserving embedded spaces at the ends of a vertical half pipe, a horizontal half pipe and an oblique half pipe of a single node, sealing, and welding connecting lugs at the end faces of the half pipes. Finally, pouring concrete into the pouring holes to fill the inner space of the multi-plane node;
the construction method of the prefabricated upright post of the FRP concrete composite structure comprises the following steps: firstly, wrapping a steel pipe by using an outer seamless winding FRP pipe, then arranging inner pipes with the radius of the inner wall of the steel pipe at two ends of the steel pipe, extending out of the designed length, connecting and fixing the steel pipe through transverse high-strength bolts on the side wall of the steel pipe and inner and outer steel plates, sealing the port of the inner pipe at the lower part of the steel pipe, arranging a pouring port at the top end of the inner pipe at the upper part of the steel pipe, pouring self-compacting concrete into the FRP steel pipe, leveling the height of the poured concrete in the FRP steel pipe with the top of the inner pipe, and welding connecting lugs at two end surfaces of the steel pipe after the concrete is formed;
According to the construction method for prefabricating girder brace of the FRP concrete combined structure, firstly, an outer seamless winding type FRP pipe is used for wrapping a steel pipe, then inner pipes with the radius equal to the radius of the inner wall of the steel pipe are arranged at two ends of the steel pipe, the design length is extended, the inner pipes are fixedly connected through transverse high-strength bolts on the side walls of the steel pipe and inner and outer steel plates, one end of each inner pipe is sealed, a pouring opening is formed in the top end of each inner pipe at the other end, self-compacting concrete is poured into the FRP steel pipe, the height of the poured concrete in the FRP steel pipe is equal to the top of each inner pipe, and connecting lugs are welded at two end surfaces of the steel pipe after the concrete is formed.
Example 2:
As shown in fig. 1, 2, 3, 4 and 5, the platform transverse strut of the upper platform structure of the assembled FRP combined guyed tower type shock absorption platform structure is formed by sleeving a prefabricated FRP concrete combination girder brace and an FRP concrete combination upright post into a ring-type damper, and is formed by butt-jointing FRP integral multi-plane nodes and fixedly connected through high-strength bolts to form a platform transverse strut structure; welding a column leg connecting port at the bottom of the platform cross brace according to the design requirement; the upper platform structure-lower truss structure connecting part consists of column leg connecting ports, stiffening ribs, connecting lugs and inner pipes, and is connected in an inner pipe nesting mode and then connected and fixed through longitudinal high-strength bolts; the damping box body structure of the upper platform structure is formed by welding steel plates into an integrated box body, high-strength bolt holes are arranged at the positions where the dampers are connected, and the damping box body platform is fixedly connected with the transverse dampers, the lead rubber pads and the platform cross braces through the high-strength bolts to form the damping platform.
Example 3:
As shown in fig. 6, 7 and 12, the lower tower structure is formed by a plurality of truss layering modules, wherein 5-6 basic truss units are connected to form a layering module single body with the height of 30 meters. The connecting component of lower truss structure layering module comprises hydraulic pressure fixer, C type sleeve 1, C type sleeve 2, rubber gasket, take conical FRP concrete inner tube, high strength bolt, and C type sleeve 1, C type sleeve 2 welded fastening respectively are in upper and lower truss's stand both ends, and the lateral wall of upper truss stand sets up hydraulic pressure fixer, and the FRP inner tube of bottom welding area conical head is equipped with rubber gasket at the top of lower truss stand.
The construction method in this embodiment is as follows:
firstly, sleeving FRP concrete combination girder brace prefabricated in a factory and FRP concrete combination upright posts into a ring-type damper, butting an FRP integral type multi-plane node, and connecting and fixing the FRP integral type multi-plane node through high-strength bolts to form a basic truss unit, wherein 5-6 basic truss units form a truss layering module unit; and then welding a C-shaped sleeve 2 at the upper end of each set single-layer module upright post, placing a rubber gasket into the C-shaped sleeve 2, welding a C-shaped sleeve 1 at the lower end of the upright post, fixing a hydraulic fixer on the side wall of the upright post through a high-strength bolt, nesting and connecting an upper-lower-layer module single structure with an inner pipe, compacting by the hydraulic fixer, and fixing through longitudinal high-strength bolt connection.
Example 4:
as shown in fig. 8 and 9, the lower truss structure-foundation connection part is composed of an independent square foundation with a connection sleeve and an FRP concrete inner pipe with a conical head, and is connected in a nested manner by the inner pipe and is fixed by longitudinal high-strength bolt connection.
The construction method in this embodiment is as follows:
Forming a connecting lug with a bolt hole and an FRP inner pipe with a conical head by welding the designed length on the lower end surface of a single upright post of a lower layer module in the lower structure layering, and then pouring concrete into the inner pipe until the inner pipe with the conical head is filled; when the underwater module works under water, after the inner pipe with the conical head at the lower end of the lower module monomer is in butt joint with the 4 connecting sleeves of the independent square foundation, the high-strength bolts on the connecting lugs are screwed up through the underwater robot.
Example 5:
FIG. 14 is a general schematic view of an assembled FRP modular guyed tower platform structure comprising an upper platform structural portion and a lower truss structural portion.
The construction method in this embodiment is as follows:
Excavating an oil extraction site to a corresponding depth, leveling, placing a template and pouring an independent square foundation, wherein a steel foundation plate with a connecting sleeve is arranged on the upper part of the foundation. After the foundation is formed, the truss layering module single bodies prefabricated in the factory are arranged in sequence and transported to corresponding places on the sea. Firstly, sinking a lower module monomer in truss layering at a specified position, butting an inner pipe with a conical head at the lower end of the lower module monomer with 4 connecting sleeves of an independent square foundation, and then screwing high-strength bolts on connecting lugs by an underwater robot; then sequentially sinking the layered module monomers into water, and screwing high-strength bolts on the connecting lugs by using an underwater robot; when the layered module is assembled to an upper module monomer, a mooring rope is tied at the connection part of the mooring rope, and a mooring weight at the lower end of the mooring rope is placed at a designed position to form a fixing effect on the tower structure; and finally, lifting the upper platform structure, butting the lower column leg connecting ports of the platform with the upper module single inner pipes of the lower structure, and connecting and welding the upper column leg connecting ports with the upper module single inner pipes through high-strength bolts on the connecting lugs.
In summary, the FRP concrete structure is applied to the field of offshore platforms, and the FRP layer greatly improves the corrosion resistance of the platform structure, reduces the later maintenance cost of components and prolongs the service life of the structure; the steel pipe layer restrains the deformation of the inner layer concrete, and fully plays the role of the strength of the concrete; the concrete layer in the member improves the overall rigidity of the structure and reduces the deformation of the lower truss structure under the action of underwater load. Through setting up annular attenuator, girder brace, stand deformation performance under the effect of loading has improved, simultaneously, has improved the durability that the member used, and the structure energy dissipation shock attenuation's ability has wholly obtained the promotion. The lower truss connection mode of the assembled FRP combined guy cable tower type damping platform structure system is formed by connecting the upright post and girder brace by the integral node prefabricated in a factory, and the construction process of the guy cable tower type damping platform structure system is simplified by the mode of inner pipe nested connection and high-strength bolt connection and fixation; the connecting part resists shearing force through the inner pipe, and the high-strength bolt resists tensile force, so that the requirements of strength and deformation of the structure are met; when in offshore site construction, the lower truss structure can simply and rapidly hoist and construct layered module monomers, assemble and butt joint the layered module monomers in sequence, screw down screws by using an underwater robot, and the construction process of the sequential butt joint is simple, short in time consumption and pollution-free; when the platform needs to be disassembled, only layered module monomers need to be disassembled in sequence and transported away, and after being transferred to other destinations, the platform can be directly installed after the foundation is poured and molded, and the platform structure can be disassembled at any time and assembled at any time, so that the effects of recycling and reducing cost are achieved. According to the novel damping platform, the novel damping platform is adopted, the damping box body, the platform cross brace and the lower truss structure are separated by the rubber cushion layer and the transverse damper, so that the vibration effect of the upper damping box body on the platform in stormy waves is reduced, and the stability of the drilling platform and the comfortableness of workers in the working process are ensured.
Claims (7)
1. An assembled FRP concrete guy cable tower type damping platform which is characterized in that: the upper structure and the lower structure of the rigid connection system are formed by assembling an upper platform structure, a plurality of upper module monomers (35), layered module connecting members (36), a plurality of lower module monomers (37) and an independent square foundation (10) respectively through integral nodes (18), ring-type dampers (8), FRP concrete combined upright posts (31), FRP concrete combined diagonal braces (34) and FRP concrete combined girder brace (19); the upper platform structure consists of a damping box body (13) and an FRP concrete platform cross brace (44), and the damping box body and the FRP concrete platform cross brace are connected through a lead rubber cushion layer (1) to form a damping system; the upper platform structure is connected with the upper structure through stiffening ribs (4) and column leg connectors (40); the lower layer structure is connected with an independent square foundation (10) through a connecting sleeve (9); the layered module connecting component (36) comprises a first C-shaped sleeve (21), a second C-shaped sleeve (16) and a hydraulic fixer (23), wherein the first C-shaped sleeve (21) is connected with the second C-shaped sleeve (16) through the hydraulic fixer (23), the upper part of the first C-shaped sleeve (21) and the lower part of the second C-shaped sleeve (16) are respectively connected with the inner pipe (25) through a ring-type damper (8), a backing plate (27) is arranged on the outer wall of the inner pipe (25), a transverse high-strength bolt (28) is arranged on the outer wall of the backing plate (27), the transverse high-strength bolt (28) is connected with the FRP concrete combined upright (31), the inner pipe (25) is inserted into the FRP concrete combined upright (31), and a connecting lug (24) is arranged at the end part of the FRP concrete combined upright (31); the side wall of the C-shaped sleeve I (21) is provided with an inclined half pipe (32) and a transverse half pipe (33), the inclined half pipe (32) and the transverse half pipe (33) are respectively connected with an FRP concrete combined diagonal bracing (34) and an FRP concrete combined girder brace (19), and the bottom of the C-shaped sleeve I (21) is provided with an FRP cone head inner pipe (22); the outer wall of the C-shaped sleeve II (16) is provided with an inclined half pipe (32) and a transverse half pipe (33), and the inclined half pipe (32) and the transverse half pipe (33) are respectively connected with an FRP concrete combined diagonal bracing (34) and an FRP concrete combined girder brace (19); the integral type node (18) comprises a vertical half pipe (30), an inclined half pipe (32) and a transverse half pipe (33), wherein the top and the bottom of the vertical half pipe (30) are respectively connected with an inner pipe (25) through a ring-type damper (8), a base plate (27) is arranged on the outer wall of the inner pipe (25), a transverse high-strength bolt (28) is arranged on the outer wall of the base plate (27), the transverse high-strength bolt (28) is connected with an FRP concrete combined column (31), the inner pipe (25) is inserted into the FRP concrete combined column (31), and a connecting lug (24) is arranged at the end part of the FRP concrete combined column (31); the side wall of the vertical half pipe (30) is provided with an inclined half pipe (32) and a transverse half pipe (33), and the inclined half pipe (32) and the transverse half pipe (33) are respectively connected with an FRP concrete combined diagonal bracing (34) and an FRP concrete combined girder brace (19).
2. The fabricated FRP concrete guy cable tower shock platform of claim 1, wherein: the outer wall of the damping box body (13) is provided with a plurality of transverse dampers (2), the transverse dampers (2) are uniformly distributed on the damping box body (13), and the damping box body (13) is provided with FRP steel plates (12).
3. The fabricated FRP concrete guy cable tower shock platform of claim 1, wherein: FRP that the understructure bottom was equipped with takes conical head inner tube (22) insert in connecting sleeve (9), connecting sleeve (9) are fixed in on independent square basis (10), independent square basis (10) include concrete base (39) and steel sheet foundation plate (38), four outer walls of concrete base (39) are equipped with steel sheet foundation plate (38).
4. The fabricated FRP concrete guy cable tower shock platform of claim 1, wherein: the upper platform structure comprises a plurality of column leg connecting ports (40), truss columns (42) and platform cross braces (43), wherein the platform cross braces (43) are arranged on the truss columns (42) in a staggered mode, the column leg connecting ports (40) are provided with platform cross braces (43) at the junction, the column leg connecting ports (40) are connected with FRP concrete combined columns (31), and stiffening ribs (4) are arranged at the column leg connecting ports (40).
5. The fabricated FRP concrete guy cable tower shock platform of claim 1, wherein: the FRP concrete combined upright column (31), the FRP concrete combined diagonal bracing (34) and the FRP concrete combined girder brace (19) are respectively divided into three forms, wherein the first form is core concrete (46), steel pipes (47) and FRP pipes (48) sequentially from inside to outside, the second form is core concrete (46), steel pipes (47), interlayer concrete (49) and FRP pipes (48) sequentially from inside to outside, and the third form is steel pipes (47), interlayer concrete (49) and FRP pipes (48) sequentially from inside to outside.
6. A method of constructing an assembled FRP concrete guy-tower vibration-damping platform according to claim 1, characterized by: the construction method of the FRP concrete combined column (31) comprises the steps of wrapping a steel pipe (47) by using an outer seamless winding type FRP pipe (48), fixing inner pipes with the radius equal to the radius of the inner wall of the steel pipe at two ends of the steel pipe through transverse high-strength bolts, extending out of the designed length, sealing ports of the inner pipes at the lower part of the steel pipe, arranging pouring ports at the top end of the inner pipes at the upper part, pouring self-compacting concrete into the FRP steel pipe, leveling the height of the poured concrete in the FRP steel pipe with the top of the inner pipes, and welding connecting lugs at two end surfaces of the steel pipe after the concrete is formed; according to the construction method of the FRP concrete combination girder brace (19), firstly, a steel pipe (47) is wrapped by an outer seamless winding type FRP pipe (48), then, the two ends of the steel pipe are extended out of an inner pipe with the transverse high-strength bolt radius being the radius of the inner wall of the steel pipe, the port of the inner pipe at one end of the steel pipe is sealed, the top end of the inner pipe at the other end is provided with a pouring port, self-compacting concrete is poured into the FRP steel pipe, the height of the poured concrete in the FRP steel pipe is equal to the top of the inner pipe, and after the concrete is formed, connecting lugs are welded at the two end surfaces of the steel pipe.
7. A method of constructing an assembled FRP concrete guy-tower vibration-damping platform according to claim 1, characterized by: firstly, excavating an oil extraction site to a corresponding depth, leveling, placing a template and pouring an independent square foundation, wherein a steel foundation plate with a connecting sleeve is arranged at the upper part of the foundation; after the foundation is formed, the truss layering module monomers prefabricated in the factory are arranged in sequence and transported to corresponding offshore sites; secondly, sinking a layered module monomer with the length of a middle-bottom layer of truss layering at a specified position, butting an inner pipe with a conical head at the lower end of a layered module monomer with 4 connecting sleeves of an independent square foundation, and then screwing high-strength bolts on the connecting lugs by an underwater robot; sequentially immersing the layered module monomers into water, completely butting an inner pipe with a conical head at the lower end of the upper module monomer with a C-shaped sleeve of the lower module monomer, compacting an interface through a hydraulic fixer, and screwing high-strength bolts on the connecting lugs by using an underwater robot; when the layered module monomer is assembled to the upper module monomer, a mooring rope (6) is tied at a mooring rope connecting point (5), and a mooring weight (11) at the lower end of the mooring rope (6) is placed at a designed position to form a fixing effect on the tower structure; and finally, lifting the upper structure, butting the column leg connecting ports at the lower part of the platform with the inner tubes of the upper module units of the lower structure, and connecting and welding and fixing the column leg connecting ports through high-strength bolts on the connecting lugs.
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