阅读说明：本技术 海上大型钢-混凝土组合固定式平台结构 (Marine large-scale steel-concrete combined fixed platform structure ) 是由 陶慕轩 王晓强 王雨伦 于 2021-09-17 设计创作，主要内容包括：本发明涉及一种海上大型钢-混凝土组合固定式平台结构,可用于海上机场、海上基地甚至海上城市等大型海洋基础设施建设,结构由钢管混凝土墩柱和钢-混凝土组合甲板构成。其中,钢管混凝土墩柱的底端通过基础固定于海床,其截面可采用圆形、方形、矩形或多边形等形状,对于较深海域可采用多腔钢管混凝土柱截面。上部甲板由钢梁与混凝土板组合成整体共同受力。本发明综合了钢与混凝土的优势,具有承载力高、强度刚度大、抗爆、易于施工等优点,在海上大型平台的建设中具有广阔的应用前景。(The invention relates to a marine large-scale steel-concrete combined fixed platform structure which can be used for the construction of large-scale marine infrastructures such as marine airports, offshore bases and even marine cities. The bottom end of the concrete-filled steel tube pier column is fixed on the seabed through a foundation, the section of the concrete-filled steel tube pier column can be in the shape of a circle, a square, a rectangle or a polygon, and the section of the concrete-filled steel tube pier column with multiple cavities can be adopted in a deeper sea area. The upper deck is formed by combining a steel beam and a concrete slab into a whole and is stressed together. The invention integrates the advantages of steel and concrete, has the advantages of high bearing capacity, high strength and rigidity, anti-explosion, easy construction and the like, and has wide application prospect in the construction of large offshore platforms.)

1. The utility model provides a marine large-scale steel-concrete combination fixed platform structure which characterized in that: the structure comprises a steel pipe concrete pier column (1), a steel-concrete combined deck (2) and a foundation (3).

2. The marine large steel-concrete composite fixed platform structure of claim 1, wherein: the concrete-filled steel tube pier column (1) is composed of an outer-layer steel tube (4) and inner-filled concrete (5).

3. The marine large-scale steel-concrete combined fixed platform structure of claim 2, wherein: the cross section of the steel tube concrete pier column (1) is one of a round, square, rectangular, polygonal or multi-cavity steel tube concrete column.

4. The marine large steel-concrete composite fixed platform structure of claim 1, wherein: the steel-concrete combined deck (2) is formed by combining a steel beam (7) and a concrete plate (6) through a connecting piece (8).

5. The marine large-scale steel-concrete combined fixed platform structure of claim 4, wherein: the connecting pieces (8) in the steel-concrete combined deck (2) adopt studs.

6. The marine large steel-concrete composite fixed platform structure of claim 1, wherein: the steel tube concrete pier column (1) forms a pier column net, the steel beam (7) in the steel-concrete combined deck (2) is simply supported or continuous in multiple spans, and the platform can be infinitely extended.

Technical Field

The invention relates to a marine large-scale steel-concrete combined fixed platform structure, and belongs to the technical field of ocean engineering.

Background

With the rapid development of economy and society, land resources cannot completely meet the requirements of human production and life, the demand of human beings on marine resources is increasing day by day, and the construction and development of large offshore platforms such as offshore airports, offshore bases and even offshore cities as infrastructure construction have very important strategic significance. Compared with a common ocean structure, the large-scale offshore platform has the advantages that the size is generally measured in kilometers, so that the structure is large, the safety requirement is high, the construction period is long, and the large-scale offshore platform needs to have the characteristics of low maintenance cost, long service life and the like.

The large offshore platform mainly comprises a fixed platform structure and a floating platform structure according to the stress mode. Wherein, the fixed platform utilizes the pier stud to support the upper deck on the seabed, and the platform directly interacts with the seabed. The floating platform floats on the sea surface by using buoyancy, and the influence of the platform on the water power is obvious. At present, a small-sized offshore fixed platform structure is mainly built by a steel structure, a concrete structure or a steel-concrete mixed structure, such as a reinforced concrete pier column commonly used in China and a steel structure column widely applied in Japan, and a platform deck is mostly of a mixed structure of a steel structure or steel structure externally-laid concrete. However, concrete structures often have the defects of heavy self weight, poor anti-seismic performance, difficult construction, complex reinforcing bar structure, easy cracking and the like, and although steel structure platforms have light self weight and good anti-seismic performance, adverse factors such as local buckling and instability must be considered due to small section rigidity and mainly stressed, steel plates have large thickness and complex stiffening rib structures, and are high in manufacturing cost and poor in anti-seismic performance, so that the steel structure is not suitable for the construction of large offshore platforms.

Disclosure of Invention

The invention aims to provide a large steel-concrete combined fixed platform structure which has high bearing capacity, good anti-cracking and anti-explosion performance, convenient construction and moderate manufacturing cost, and makes full use of the advantages of two materials of steel and concrete, thereby leading the structure to obtain better mechanical property, construction performance and comprehensive economic index.

The technical scheme of the invention is as follows:

the utility model provides a marine large-scale steel-concrete combination fixed platform structure which characterized in that: the platform consists of a steel pipe concrete pier stud, a steel-concrete combined deck and a foundation.

The steel tube concrete pier column is composed of an outer layer steel tube and inner filling concrete, and the cross section of the steel tube concrete pier column is one of a round, square, rectangular, polygonal or multi-cavity steel tube concrete column.

The steel-concrete combined deck is formed by combining steel beams and concrete plates through connecting pieces. The connecting piece adopts a stud.

On the basis of the technical scheme, the concrete filled steel tube pier column forms a column net, steel beams in the steel-concrete combined deck are simply supported or continuous in multiple spans, and the platform can be infinitely extended.

Compared with the prior art, the invention has the following advantages and prominent effects: the concrete-filled steel tube pier column effectively utilizes the compression performance of the confined concrete, avoids buckling of the outer steel tube and increases the utilization efficiency of materials. Secondly, the steel-concrete combined deck fully exerts the tensile property of the steel beam and the compression property of the upper concrete plate by utilizing the combined action, and simultaneously enhances the anti-explosion property of the structure compared with the traditional steel structure deck. The steel structure part can be used as a permanent template for pouring of the concrete part, the formwork supporting procedures are reduced, the construction process is simple, and the construction speed is high. And fourthly, the rigidity, the strength and the ductility of the structure are enhanced through the steel-concrete combination, and the earthquake resistance and the wind resistance of the structure are facilitated.

Drawings

Fig. 1 is a schematic perspective view of a large-scale steel-concrete combined fixed platform structure on the sea according to the present invention.

Fig. 2 is a schematic cross-sectional view of the structure of the present invention.

FIG. 3 is a schematic structural diagram of a concrete filled steel tubular column with a circular cross section.

FIG. 4 is a schematic structural diagram of a concrete filled steel tubular column with a rectangular cross section.

In the figure: 1-a steel tube concrete column; 2-steel-concrete composite deck; 3-column base; 4-outer layer steel pipe; 5-concrete; 6-a concrete slab; 7-a steel beam; 8-a connector; 9-sea surface.

Detailed Description

The following further describes embodiments of the present invention with reference to the accompanying drawings.

Fig. 1 is a schematic perspective view of the present invention. The concrete construction steps are as follows:

1) the column foundation 3 is built according to the marine environment and seabed geological characteristics, and the foundation can be a single-pile foundation, a multi-pile foundation, a negative pressure cylinder foundation, a tripod foundation and the like.

2) The steel pipes 4 are connected to the foundation 3, and then the steel pipes 4 are used as permanent forms to pour concrete 5, thereby forming the steel pipe concrete pier 1. The section form of the steel pipe 4 can be round, square, rectangle, polygon and other shapes, and a multi-cavity steel pipe concrete column can be used in deeper sea areas.

3) After the concrete filled steel tube pier stud 1 is built, the steel beam 7 with the stud connecting piece 8 is hoisted, and the steel beam 7 can be designed to be single-span or multi-span continuous as required.

4) And (5) pouring an upper concrete plate 6 to form the combined deck 2 together with the steel beam. And the precast concrete slabs can be used as permanent formworks and then poured to form a precast slab combined deck or a laminated slab combined deck.

5) The steel pipe concrete column 1 forms a column net, and the platform can be infinitely extended to form a huge structure.

The large-scale steel-concrete combined fixed platform structure provided by the invention has the advantages of high bearing capacity, good anti-cracking and anti-explosion performance, convenience in construction and moderate cost, and can be used for constructing large-scale marine infrastructures such as offshore airports, offshore bases and even offshore cities. The structure makes full use of the advantages of two materials of steel and concrete, avoids buckling deformation caused by steel compression by utilizing the supporting action of the concrete in the steel tube concrete pier stud, makes the confined concrete fully compressed, improves the compression performance of the pier stud, fully exerts the tension performance of the steel beam and the compression performance of the upper concrete slab by utilizing the combined action of the steel and the concrete in the steel-concrete composite deck, and enhances the anti-cracking and anti-explosion performance of the structure. The steel structure part can be used as a permanent template for pouring of the concrete part, the formwork supporting procedures are reduced, the construction process is simple, and the construction speed is high. The integral structure enhances the rigidity, the strength and the ductility through the combined action of steel and concrete, is favorable for the earthquake resistance and the wind resistance of the structure, and has wide application prospect in the construction of large ocean platforms.