CN216405468U - Offshore wind power truss concrete cylindrical foundation - Google Patents

Abstract

The utility model relates to an offshore wind power truss concrete cylindrical foundation which comprises a polygonal cylinder wall, wherein the polygonal cylinder wall is formed by assembling a plurality of steel truss concrete combined cylinder wall modules with the same structure, each steel truss concrete combined cylinder wall module comprises a module inner steel wrap, a module outer steel wrap, a vertical stiffening rib, a transverse stiffening rib, an oblique stiffening rib and a counter-pull support, concrete is filled between the module inner steel wrap and the module outer steel wrap, the oblique stiffening rib is connected with the vertical stiffening rib and the transverse stiffening rib, and the counter-pull support is connected with the module inner steel wrap and the module outer steel wrap. The section of thick bamboo wall adopts concrete package steel construction, and the section of thick bamboo wall can not bucking in the negative pressure sinking in-process, and stability is good when on the throne, has solved traditional section of thick bamboo type basic steel section of thick bamboo wall and has easily bucked, section of thick bamboo wall and subdivision steel sheet connected node atress drawbacks such as big.

Description

Offshore wind power truss concrete cylinder foundation

technical field

The utility model relates to an offshore wind power foundation structure, in particular to an offshore wind power truss concrete cylinder foundation and a construction method.

Background technique

Due to the weak foundation conditions such as silt and silty clay in the offshore area of my country, in order to meet the requirements of foundation bearing capacity and foundation deformation, traditional pile foundations (such as single pile foundation and jacket foundation) are usually used. Large hoisting ships and piling ships are needed to assist the construction. By hammering the piles, the piles penetrate the weak soil layer and enter a better bearing layer, which is costly and has a long construction period.

With the increase of the single-unit capacity of offshore wind turbines, the use of traditional monopile and jacket foundations needs to increase the size and material consumption of the foundation, and the limitation of large-diameter monopile piling by construction equipment has become an insurmountable problem. In response to this problem, patent CN107761755A, patent CN106759445 and patent CN102877478A disclose a suction-type composite cylindrical foundation, which is gradually used in offshore wind power. Due to its stress characteristics and construction method, the cylindrical foundation is suitable for clay, sand and other soil layers with certain bearing capacity. However, the above-mentioned suction composite cylindrical foundation still has the following drawbacks: (1) The lower cylindrical body is made of thin-walled steel plate, in order to avoid the buckling of the cylindrical wall when manufacturing the transition section on it, during the manufacturing, transportation, installation and sinking of the foundation There are certain risks; (2) The load transmission method of the transition section and the bottom plate is complicated, and the lower structure of the tube foundation cannot be fully used for bearing capacity; (3) The outer silo slab is too long and is prone to buckling during the negative pressure sinking process.

Utility model content

In order to solve the above problems, the utility model provides an offshore wind power truss concrete cylinder foundation, the base cylinder wall adopts a concrete clad steel structure, and has the advantages of no buckling of the cylinder wall, reduced base plate span, convenient formwork support, low foundation floating center of gravity, It has the advantages of good stability and high construction efficiency of modular assembly of the cylinder wall, which is suitable for soft foundations such as silt, silty soil and silt.

The technical scheme adopted by the utility model is: an offshore wind power truss concrete cylinder foundation, comprising a polygonal cylinder wall, characterized in that: the polygonal cylinder wall is assembled by a plurality of steel truss concrete combined cylinder wall modules of the same structure, The steel truss concrete composite cylinder wall module includes module inner-clad steel, module outer-clad steel, vertical stiffeners, transverse stiffeners, oblique stiffeners and tension supports. Filled with concrete, the inner clad steel of the module and the outer steel of the module are uniformly provided with a plurality of horizontally arranged transverse stiffeners along the vertical direction, between the transverse stiffeners on the inner clad steel of the module and outside the module A plurality of vertically arranged vertical stiffeners are evenly arranged between the transverse stiffeners on the clad steel along the horizontal direction; the transverse stiffeners on the inner clad steel of the module and the corresponding transverse stiffeners on the outer clad steel of the module A horizontally-arranged pair of tensile supports is arranged therebetween, and a horizontally arranged oblique stiffening rib is arranged between the pair of tensile supports, the transverse stiffening rib and the vertical stiffening rib. The cylinder wall adopts a concrete-clad steel structure, which will not buckle during the negative pressure sinking process, and has good stability in position; the cylinder wall is assembled from multiple steel truss concrete combined cylinder wall modules with the same structure, and the construction efficiency is high. , shorten the manufacturing period of the cylindrical foundation, and can realize one-step integral installation.

Preferably, the thickness of the inner clad steel of the module and the outer steel of the module are both 3-20 mm, and the thickness of the concrete filled between the inner clad steel of the module and the outer steel of the module is 100 to 500 mm.

Preferably, the cross section of the polygonal cylinder wall is a regular polygon, the number of sides is 4-12, and the side length is 10-30m.

Preferably, the vertical stiffening rib is L-shaped steel, and the width is 1/20-1/10 of the height of the cylinder wall.

Preferably, the transverse stiffener is L-shaped steel, and the width is 1/20-1/10 of the width of the cylinder wall.

Preferably, the oblique stiffeners and the anti-tension support are made of L-shaped steel, the oblique stiffeners are connected to the vertical and lateral stiffeners, and their dimensions are determined according to the arrangement of the vertical and lateral stiffeners; , the size of the tension support is the thickness of the cylinder wall.

Preferably, the adjacent steel truss concrete composite cylinder wall modules are connected through cylinder wall corner points.

Preferably, the polygonal cylindrical wall and the top steel plate are enclosed to form a cylindrical cavity structure with a closed upper end and an open lower end, and the cylindrical cavity structure is provided with a subdivision steel plate and a central cabin steel plate, and the subdivision steel plate The cylindrical cavity structure is divided into a plurality of sub-silo cavities along the axis with the central cabin steel plate; the central cabin steel plate is combined to form a regular polygonal structure similar to the polygonal cylinder wall, and the connecting line of the adjacent central cabin steel plate and the sub-cabin steel plate The intersection of the connecting line sets the corner point of the CFST column.

Further, the thickness of the polygonal cylinder wall, the sub-cabin steel plate and the central cabin steel plate is 100-500 mm, and the thickness of the cylinder-top steel plate is 100-500 mm.

Further, the diameter of the CFST column at the corner point is 100-800 mm, the wall thickness of the steel pipe is 5-80 mm, and the height is calculated and determined according to the actual hydrogeological conditions. The top of the CFST column at the corner point is connected to the upper structure of the cylinder, and the inside of the steel tube can be filled with reinforced concrete, reinforced mesh or plain concrete to increase the compressive performance and stability of the structure.

The beneficial effects obtained by the utility model are as follows: the cylinder wall of the utility model adopts a concrete-clad steel structure, the cylinder wall will not be buckled during the negative pressure sinking process, and the stability is good when it is in place; The truss concrete combined cylinder wall module is assembled, which has high construction efficiency, shortens the manufacturing period of the cylinder foundation, and can realize one-step overall installation. The cylindrical foundation of the utility model not only has the advantages of a large bearing area, can sink under negative pressure, can be installed in one step, and has good stability when in place, etc. The bottom plate span is convenient for form support, the foundation floating center of gravity is low, the stability is good, and the construction efficiency of the modular assembly of the cylinder wall is high, which shortens the construction period of the cylinder foundation and improves the stability of the foundation sinking. The composite cylindrical foundation can reduce the comprehensive cost by 10% to 25%, and is suitable for most of the sea areas with weak covering layers in the coastal waters of China. The cylindrical foundation of the utility model can improve the horizontal bearing performance of the single pile, can reduce the pile diameter under the condition of providing the same horizontal rigidity as the ordinary steel pipe pile, and satisfies the requirements of the existing pile driving equipment and driller rock-socketing equipment for piles. Diameter requirements, at the same time can greatly reduce the amount of steel, good economy, is conducive to popularization and utilization.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the schematic diagram of the corner point of the cylinder wall;

Figure 3 is a schematic diagram of a steel truss concrete composite cylinder wall module;

Figure 4 is a plan view of a steel truss concrete composite cylinder wall module;

Reference signs: 1. Steel truss concrete composite cylinder wall module; 2. Steel plate at the top of the cylinder; 3. Vertical stiffeners; 4. Transverse stiffeners; Steel plate; 8. Corner concrete-filled steel tubular column; 9. Oblique stiffener; 10. Tensile support; 11. Steel inside the module; 12. Steel outside the module.

Detailed ways

The present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figures 1-4, an offshore wind power truss concrete cylinder foundation of the present invention includes a polygonal cylinder wall, and the polygonal cylinder wall is assembled from a plurality of steel truss concrete combined cylinder wall modules 1 of the same structure, without the need for complete Plate welding, high construction efficiency; in this embodiment, the steel truss concrete composite cylinder wall module 1 includes module inner clad steel 11, module outer steel 12, vertical stiffeners 3, transverse stiffeners 4, oblique stiffeners 9 and For the tensile support 10, concrete is filled between the inner clad steel 11 of the module and the outer clad steel 12 of the module, and the inner clad steel 11 of the module and the outer clad steel 12 of the module are uniformly provided with a plurality of horizontally arranged transverse stiffeners along the vertical direction 4. Between the transverse stiffeners 4 on the inner clad steel 11 of the module and between the transverse stiffeners 4 on the outer clad steel 12 of the module are uniformly provided with a plurality of vertically arranged vertical stiffeners 3 along the horizontal direction; Between the transverse stiffeners 4 on the clad steel 11 and the transverse stiffeners 4 on the corresponding module clad steel 12, there is a horizontally arranged pair of tensile supports 10, the pair of tensile supports 10, the transverse stiffeners 4 and the vertical stiffeners A horizontally arranged oblique stiffening rib 9 is provided between the ribs 3 . The cylinder wall adopts a concrete-clad steel structure, the cylinder wall will not buck during the negative pressure sinking process, and the stability is good when in position, which solves the problem that the traditional cylinder foundation steel cylinder wall is easy to buckle, and the connection node between the cylinder wall and the subdivision steel plate is stressed. Major disadvantages.

In one embodiment, the thicknesses of the module inner clad steel 11 and the module outer clad steel 12 are both 3-20 mm, and the thickness of the concrete filled between the module inner clad steel 11 and the module outer clad steel 12 is 100-500 mm.

In one embodiment, the cross section of the polygonal cylinder wall is a regular polygon, the number of sides is 4-12, and the length of the side is 10-30m. In this embodiment, the cross-section of the side-shaped cylindrical wall is a regular hexagon, the side length is 18.5m, and the distance between the opposite sides of the regular hexagon is 32.0m.

In one embodiment, the vertical stiffening rib 3 is made of L-shaped steel, and the width is 1/20-1/10 of the height of the cylinder wall. In this embodiment, the vertical stiffening rib 3 is 1.6 m wide.

In one embodiment, the transverse stiffening rib 4 is made of L-shaped steel, and the width is 1/20-1/10 of the width of the cylinder wall. In this embodiment, the width of the transverse stiffener 4 is 1.85m.

In one embodiment, both the oblique stiffening rib 9 and the tension support 10 are L-shaped steel. In this embodiment, the oblique stiffening rib 9 connects the vertical stiffening rib 3 and the lateral stiffening rib 4, and its size is determined according to the arrangement of the vertical and lateral stiffening ribs; , the size of the tension support 10 is the thickness of the cylinder wall. In this embodiment, the width of the oblique stiffening rib 9 is 0.36 m, and the width of the tension support 10 is 0.3 m.

Referring to FIG. 2 , in an embodiment, adjacent steel truss concrete composite cylinder wall modules 1 are connected through cylinder wall corner points 5 . In this implementation, thickened steel plates are used for the corner points 5 of the cylinder wall, and the adjacent steel truss-concrete composite cylinder wall modules 1 are connected by welding, so that the cylinder wall forms a whole.

In one embodiment, the polygonal cylindrical wall and the top steel plate 2 are enclosed to form a cylindrical cavity structure with a closed upper end and an open lower end. The cylindrical cavity structure is provided with a subdivision steel plate 6 and a central cabin steel plate 7. The subdivision steel plate 6 and the center tank steel plate 7 divide the cylindrical cavity structure into a plurality of sub-silo cavities along the axis; the center tank steel plate 7 encloses a regular polygonal structure similar to the polygonal cylinder wall (the cross-sectional shape is a regular polygon), and the adjacent said The corner point concrete-filled steel tubular column is set at the intersection of the connecting line of the steel plate of the central cabin and the connecting line of the steel plate of the sub-cabin. In this embodiment, the steel plate 7 of the central cabin is surrounded by a regular hexagon structure, and the side length is 7.5m.

In one embodiment, the thickness of the polygonal cylinder wall, the sub-chamber steel plate 6 and the center tank steel plate 7 is 100-500 mm, and the thickness of the cylinder-top steel plate is 100-500 mm. In this embodiment, the thickness of the top steel plate 2 , the sub-cabin steel plate 6 and the central cabin steel plate 7 are all 100 mm.

In one embodiment, the diameter of the CFST column 8 at the corner point is 100-800 mm, the wall thickness of the steel pipe is 5-80 mm, the top of the CFST column 8 at the corner point is connected to the upper structure of the cylinder, and the interior of the steel pipe can be filled with reinforced concrete, reinforced mesh or plain. concrete to increase the compressive properties and stability of the structure. In this embodiment, the corner point CFST column 8 has a diameter of 500 mm and a wall thickness of 16 mm.

The upper structure of the cylindrical foundation of the utility model is a polygonal beam-slab system and a transition section structure, and the polygonal cylinder wall and the upper structure of the cylinder are all made of cast-in-place concrete, and are connected by anchoring or embedded parts of steel bars.

The basic principles and main structural features of the present invention are shown and described above. The present utility model is not limited by the above-mentioned examples, and without departing from the spirit and scope of the present utility model, the present utility model will also have various changes and improvements, and these changes and improvements all fall within the scope of the claimed utility model. Inside. The claimed scope of the present invention is defined by the appended claims and their equivalents.

Claims (10)

1. An offshore wind power truss concrete cylinder foundation, comprising a polygonal cylinder wall, characterized in that: the polygonal cylinder wall is assembled from a plurality of steel truss concrete combined cylinder wall modules of the same structure, and the steel truss concrete combined cylinder is assembled. The wall module includes module inner clad steel, module outer clad steel, vertical stiffeners, transverse stiffeners, oblique stiffeners, and a pair of tensile supports, and concrete is filled between the module inner clad steel and the module outer clad steel, and the The inner clad steel of the module and the outer steel of the module are uniformly provided with a plurality of transverse stiffeners arranged horizontally along the vertical direction. A plurality of vertically arranged vertical stiffening ribs are evenly arranged between them along the horizontal direction; horizontal stiffening ribs are arranged between the transverse stiffening ribs on the inner clad steel of the module and the corresponding transverse stiffening ribs on the outer steel cladding of the module. For the tension support, horizontally arranged oblique reinforcement ribs are arranged between the tension support, the transverse reinforcement ribs and the vertical reinforcement ribs. 2. The truss concrete cylinder foundation for offshore wind power according to claim 1, characterized in that: the thicknesses of the inner-coated steel of the module and the outer-coated steel of the module are both 3-20 mm, and the inner-coated steel of the module and the outer-coated steel of the module are both 3-20 mm thick. The thickness of the concrete filled between the steels is 100 to 500 mm. 3 . The truss concrete cylindrical foundation for offshore wind power according to claim 1 , wherein the cross section of the polygonal cylindrical wall is a regular polygon, the number of sides is 4-12, and the length of the side is 10-30 m. 4 . The truss concrete cylinder foundation for offshore wind power according to claim 1, characterized in that: the vertical stiffener is L-shaped steel, and the width is 1/20-1/10 of the height of the cylinder wall. 5 . The truss concrete cylinder foundation for offshore wind power according to claim 1 , wherein the transverse stiffener is L-shaped steel, and the width is 1/20-1/10 of the width of the cylinder wall. 6 . 6 . The truss concrete cylinder foundation for offshore wind power according to claim 1 , wherein the oblique stiffeners and the tension supports are all made of L-shaped steel. 7 . 7 . The truss concrete cylinder foundation for offshore wind power according to claim 1 , wherein the adjacent steel truss concrete composite cylinder wall modules are connected through cylinder wall corner points. 8 . 8 . The truss concrete cylindrical foundation for offshore wind power according to claim 1 , wherein the polygonal cylindrical wall and the top steel plate are enclosed to form a cylindrical cavity structure with a closed upper end and an open lower end. The cavity structure is provided with subdivision steel plates and central cabin steel plates, and the subdivision steel plates and the center cabin steel plates divide the cylindrical cavity structure into a plurality of subdivision cavities along the axis; A regular polygonal structure, and a corner point CFST column is set adjacent to the intersection of the connecting line of the steel plate of the central cabin and the connecting line of the steel plate of the sub-cabin. 9 . The truss concrete cylindrical foundation for offshore wind power according to claim 8 , wherein the thickness of the polygonal cylindrical wall, the sub-chamber steel plate and the center tank steel plate is 100-500 mm, and the thickness of the top steel plate is 100-500 mm. 10 . 10 . The truss concrete cylindrical foundation for offshore wind power according to claim 8 , wherein the diameter of the corner point CFST column is 100-800 mm, and the wall thickness of the steel pipe is 5-80 mm. 11 .

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