An underwater double-layer split concrete caisson foundation structure

Abstract

The application is a kind of underwater double-layer split concrete caisson foundation structure, which comprises a lower caisson, an upper caisson and a tower column, the tower column penetrates through the center of the lower caisson and is fixed on the bottom plate of the lower caisson, and the middle part of the upper caisson is arranged on the tower column; further comprising two steel hoop bracket limiting components which are detachably installed on the tower column, and the two steel hoop bracket limiting components are respectively installed on the upper end and the lower end of the upper caisson. The double-layer split concrete caisson foundation structure can be prefabricated in layers, the maximum weight of a single component is reduced, and the construction hoisting is easy, which provides a kind of offshore foundation installation structure which is easy to install and float, convenient to transport and simple to construct.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of offshore wind power foundation, and particularly relates to an underwater double-layer split concrete caisson foundation structure. BACKGROUND

[0002] The gravity type offshore wind power foundation is usually installed by large floating cranes and other professional equipment, and the precasting, transportation and installation of the concrete foundation structure need to be cooperated with large equipment and special process. In particular, in the area with good wind field, the wind wave is large all the year round, the operation window period is short, and the transportation and construction cost accounts for a high proportion. The overall floating operation after the installation of the wind turbine and the foundation can shorten the offshore installation period, but the center of gravity of the structure is too high, and the transportation process is prone to overturning. SUMMARY

[0003] The present application aims at solving the problems of the prior art, and provides an underwater double-layer split concrete caisson foundation structure, which is an offshore wind power foundation structure with overall installation and floating operation, convenient transportation and simple construction.

[0004] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0005] An underwater double-layer split concrete caisson foundation structure, comprising a lower caisson, an upper caisson and a tower column, the tower column passes through the center of the lower caisson and is fixed on the bottom plate of the lower caisson, and the middle part of the upper caisson is arranged on the tower column.

[0006] The underwater double-layer split concrete caisson foundation structure further comprises two steel hoop hanger limiting components which are detachably arranged on the tower column, and the two steel hoop hanger limiting components are respectively arranged at the upper end and the lower end of the upper caisson.

[0007] The lower caisson is a box structure surrounded by a lower caisson bottom plate, a lower caisson top plate and a lower caisson outer wall, and a lower caisson core wall is arranged between the middle parts of the lower caisson bottom plate and the lower caisson top plate and surrounds the tower column, the lower end of the tower column is integrally formed with the lower caisson core wall and the lower caisson bottom plate, and a plurality of lower caisson partition walls are arranged between the lower caisson bottom plate and the lower caisson top plate and inside the lower caisson outer wall and the lower caisson core wall, so that the inner cavity of the lower caisson is divided into a plurality of compartments.

[0008] The upper caisson is a box structure surrounded by an upper caisson bottom plate, an upper caisson top plate and an upper caisson outer wall, an upper caisson core wall is arranged between the middle parts of the upper caisson bottom plate and the upper caisson top plate and surrounds the tower column, the tower column is slidably arranged inside the upper caisson core wall, and a plurality of upper caisson partition walls are arranged between the upper caisson bottom plate and the upper caisson top plate and inside the upper caisson outer wall and the upper caisson core wall, so that the inner cavity of the upper caisson is divided into a plurality of compartments.

[0009] Each steel hoop bracket limit component comprises two semicircular steel bracket hoops arranged on the tower column, and each semicircular steel bracket hoop is provided with connecting lug plates at two ends.

[0010] The bottom plate of the lower caisson is a circular structure, and the top plate of the lower caisson is an annular structure.

[0011] The bottom plate of the upper caisson and the top plate of the upper caisson are annular structures.

[0012] The diameter of the lower caisson and the upper caisson is 34m, and the height is 6m.

[0013] The thickness of the partition wall of the lower caisson and the partition wall of the upper caisson is 30cm, the spacing between adjacent partition walls of the lower caisson is not more than 5m, and the spacing between adjacent partition walls of the upper caisson is not more than 5m.

[0014] The thickness of the bottom plate of the lower caisson, the top plate of the lower caisson, the outer wall of the lower caisson, the bottom plate of the upper caisson, the top plate of the upper caisson and the outer wall of the upper caisson is 60cm.

[0015] The tower column is a steel pipe structure, the outer diameter is 6m, the wall thickness is 4cm, and longitudinal and transverse rib plates are arranged between the inner walls of the tower column.

[0016] The beneficial effects of the present application are: the double-layer split concrete caisson foundation structure can be prefabricated in layers, the maximum weight of a single component is reduced, the construction and hoisting are easy, and an offshore foundation installation structure which is easy to install and float, convenient to transport and simple to construct is provided. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a structural schematic diagram of the present application;

[0018] Figure 2 is Figure 1 a sectional view of A-A;

[0019] Figure 3 is Figure 1 an enlarged view of B;

[0020] Figure 4 is a schematic diagram of the present application after assembly;

[0021] In the figure: 1 - lower caisson; 2 - upper caisson; 3 - tower column; 4 - steel hoop bracket limit component; 5 - gravel leveling base; 6 - fan;

[0022] 11 - lower caisson bottom plate; 12 - lower caisson top plate; 13 - lower caisson outer wall; 14 - lower caisson core wall; 15 - lower caisson partition wall;

[0023] 21 - upper caisson bottom plate; 22 - upper caisson top plate; 23 - upper caisson outer wall; 24 - upper caisson core wall; 25 - upper caisson partition wall;

[0024] 41 - semi-circular steel bracket hoop; 42 - connecting lug plate; 43 - bolt;

[0025] The present application will be described in detail below with reference to embodiments thereof in conjunction with the attached drawings. DETAILED DESCRIPTION

[0026] The principles and features of this application can be better understood when considered in connection with the accompanying drawings, in which:

[0027] It should be noted that when an element or layer is referred to as being "on" another element or substrate, it can be directly on the other element or substrate, or intervening elements can also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements can be present. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

[0029] The application will be further described with reference to the drawings and the following examples:

[0030] An underwater double-layer split concrete caisson foundation structure, as shown in Figures 1 to 4 Fig. 1, comprises a lower caisson 1, an upper caisson 2 and a tower column 3, the lower caisson 1 and the upper caisson 2 being double-layer concrete caisson foundation structures, the upper caisson 2 being a sliding caisson that can slide along the tower column 3 as needed, and the tower column 3 being fixed to the lower caisson 1 by steel embedded parts.

[0031] The lower caisson 1 is used to increase the buoyancy and to lower the overall structure's gravity center height by adjusting its draft when floating for transportation.

[0032] The upper caisson 2 can slide along the tower column 3, and is used for increasing the overall structure buoyancy and increasing the height of the buoyancy center during floating transportation. In order to ensure that the upper caisson 2 is fixed after adjusting the position during floating transportation, two steel hoop bracket limiting components 4 are arranged on the tower column 3, and the two steel hoop bracket limiting components 4 are respectively arranged at the upper end and the lower end of the upper caisson 2. Each steel hoop bracket limiting component 4 comprises two semicircular steel bracket hoops 41 arranged on the tower column 3, and the two ends of each semicircular steel bracket hoop 41 are provided with connecting lug plates 42, and the connecting lug plates 42 corresponding to the two semicircular steel bracket hoops 41 are detachably connected through bolts 43. In this way, after the upper caisson 2 is adjusted to the position, the upper and lower ends of the upper caisson 2 can be limited and fixed through the semicircular steel bracket hoops 41, and the semicircular steel bracket hoops 41 can be removed during installation.

[0033] The top of the tower column 3 is used for installing components such as a fan 6.

[0034] During installation, the lower caisson 1 is arranged in place and installed on the gravel leveled base 5, and then the steel hoop bracket limiting components 4 are removed, and the upper caisson 2 is sunk and arranged on the upper part of the lower caisson 1 after being filled with water.

[0035] The lower caisson 1 is a box structure surrounded by a lower caisson bottom plate 11, a lower caisson top plate 12 and a lower caisson outer wall 13, and a lower caisson core wall 14 is arranged between the middle parts of the lower caisson bottom plate 11 and the lower caisson top plate 12 and surrounds the tower column 3, the lower end of the tower column 3 is integrally formed with the lower caisson core wall 14 and the lower caisson bottom plate 11, and a plurality of lower caisson partition walls 15 are arranged between the lower caisson bottom plate 11 and the lower caisson top plate 12 inside the lower caisson outer wall 13 and the lower caisson core wall 14, and the lower caisson partition walls 15 divide the inner cavity of the lower caisson 1 into a plurality of compartments.

[0036] The upper caisson 2 is a box structure surrounded by an upper caisson bottom plate 21, an upper caisson top plate 22 and an upper caisson outer wall 23, an upper caisson core wall 24 is arranged between the middle parts of the upper caisson bottom plate 21 and the upper caisson top plate 22 and surrounds the tower column 3, the tower column 3 is slidably arranged inside the upper caisson core wall 24, and a plurality of upper caisson partition walls 25 are arranged between the upper caisson bottom plate 21 and the upper caisson top plate 22 inside the upper caisson outer wall 23 and the upper caisson core wall 24, and the upper caisson partition walls 25 divide the inner cavity of the upper caisson 2 into a plurality of compartments.

[0037] The lower caisson bottom plate 11 is a circular structure, and the lower caisson top plate 12 is an annular structure.

[0038] The upper caisson bottom plate 21 and the upper caisson top plate 22 are annular structures.

[0039] The diameters of the lower caisson 1 and the upper caisson 2 are 34 m, and the heights are 6 m.

[0040] The thickness of the lower caisson partition wall 15 and the upper caisson partition wall 25 is 30 cm, the distance between adjacent lower caisson partition walls 15 is not more than 5 m, and the distance between adjacent upper caisson partition walls 25 is not more than 5 m.

[0041] The thickness of the lower caisson bottom plate 11, the lower caisson top plate 12, the lower caisson outer wall 13, the upper caisson bottom plate 21, the upper caisson top plate 22 and the upper caisson outer wall 23 is 60 cm.

[0042] The tower column 3 is a steel pipe structure, the outer diameter is 6 m, the wall thickness is 4 cm, and longitudinal and transverse rib plates are arranged between the inner walls of the tower column 3.

[0043] The fan 6 is fixed to the double-layer split concrete caisson foundation structure through the tower column 3 and is integrally floated, the position of the upper caisson 2 is adjusted to adjust the floating center height of the overall structure to ensure the floating stability.

[0044] The double-layer split concrete caisson foundation structure can be prefabricated in layers, the maximum weight of a single component is reduced, the construction and hoisting are easy, and a solution that is easy to install and float as a whole, convenient to transport and simple to construct is provided, especially under harsh transportation and construction conditions, the feasibility and economy of the solution of the present application are particularly prominent, the structure has very good practical value and can be used for various offshore gravity type structure platform foundations, offshore wind power foundations and the like.

[0045] The present application is described above in conjunction with the drawings, and it is obvious that the specific implementation of the present application is not limited by the above manner, and various improvements using the method concept and technical solution of the present application or direct application to other occasions without improvement are within the protection scope of the present application.

Claims

1. An underwater double-layer split concrete caisson foundation structure, characterized in that, It includes a lower caisson (1), an upper caisson (2) and a tower column (3). The bottom of the tower column (3) passes through the center of the lower caisson (1) and is fixed to the bottom plate of the lower caisson (1). The middle part of the upper caisson (2) is inserted through the tower column (3). The upper caisson (2) is a box structure formed by the upper caisson bottom plate (21), the upper caisson top plate (22) and the upper caisson outer wall (23). The upper caisson core wall (24) is provided between the upper caisson bottom plate (21) and the upper caisson top plate (22) and the tower column (3). The tower column (3) slides through the upper caisson core wall (24). Between the upper caisson bottom plate (21) and the upper caisson top plate (22), there are several upper caisson partition walls (25) inside the upper caisson outer wall (23) and the upper caisson core wall (24). The upper caisson partition walls (25) divide the inner cavity of the upper caisson (2) into several compartments. It also includes two steel clamp bracket limiting components (4) that can be detachably installed on the tower column (3), and the two steel clamp bracket limiting components (4) are installed on the upper and lower ends of the upper caisson (2) respectively.

2. The underwater double-layer split concrete caisson foundation structure according to claim 1, characterized in that, The lower caisson (1) is a box structure formed by the lower caisson bottom plate (11), the lower caisson top plate (12) and the lower caisson outer wall (13). The lower caisson core wall (14) is provided between the lower caisson bottom plate (11) and the lower caisson top plate (12) around the tower column (3). The lower end of the tower column (3) is integrated with the lower caisson core wall (14) and the lower caisson bottom plate (11). Several lower caisson partition walls (15) are provided between the lower caisson bottom plate (11) and the lower caisson top plate (12) inside the lower caisson outer wall (13) and the lower caisson core wall (14). The lower caisson partition walls (15) divide the inner cavity of the lower caisson (1) into several compartments.

3. The underwater double-layer split concrete caisson foundation structure according to claim 2, characterized in that, Each steel bracket bracket limiting assembly (4) includes two semi-circular steel bracket brackets (41) mounted on the tower column (3). Each semi-circular steel bracket bracket (41) has connecting ear plates (42) at both ends. The connecting ear plates (42) corresponding to the two semi-circular steel bracket brackets (41) are detachably connected by bolts (43).

4. The underwater double-layer split concrete caisson foundation structure according to claim 3, characterized in that, The bottom plate (11) of the lower caisson is a circular structure, and the top plate (12) of the lower caisson is an annular structure.

5. The underwater double-layer split concrete caisson foundation structure according to claim 4, characterized in that, The bottom plate (21) and top plate (22) of the upper caisson are both ring structures.

6. The underwater double-layer split concrete caisson foundation structure according to claim 5, characterized in that, The diameter of the lower caisson (1) and the upper caisson (2) is 34m and the height is 6m.

7. The underwater double-layer split concrete caisson foundation structure according to claim 6, characterized in that, The thickness of the lower caisson partition wall (15) and the upper caisson partition wall (25) is 30cm. The distance between adjacent lower caisson partition walls (15) shall not exceed 5m, and the distance between adjacent upper caisson partition walls (25) shall not exceed 5m.

8. The underwater double-layer split concrete caisson foundation structure according to claim 7, characterized in that, The thickness of the lower caisson bottom plate (11), the lower caisson top plate (12), the lower caisson outer wall (13), the upper caisson bottom plate (21), the upper caisson top plate (22) and the upper caisson outer wall (23) is 60cm.

9. The underwater double-layer split concrete caisson foundation structure according to claim 8, characterized in that, The tower column (3) is a steel pipe structure with an outer diameter of 6m and a wall thickness of 4cm. The inner wall of the tower column (3) is provided with longitudinal ribs and transverse ribs.

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