Seaborne special-shaped bearing platform structure

Abstract

The utility model discloses an offshore special-shaped bearing platform structure which comprises a prefabricated bearing platform shell and a reinforced concrete structure cast in place in the prefabricated bearing platform shell. The prefabricated bearing platform shell is of a concrete thin-wall structure and comprises a lower-layer shell body and an upper-layer shell body. The horizontal sections of the upper-layer shell and the lower-layer shell are similar to ellipses; a pre-buried hole allowing a pile foundation to be inserted therein is reserved in the bottom of the lower-layer shell, and a concrete sealing layer is arranged between the top of the pile foundation and the pre-buried hole. The appearance quality of the bearing platform structure is improved, and the quality of the bearing platform structure is guaranteed; the problem that a large-span offshore special-shaped bearing platform foundation is difficult to hoist due to large size and heavy weight is solved, the construction difficulty of a special-shaped bearing platform is reduced, and the construction efficiency of the special-shaped bearing platform is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pedestal structures, and more specifically, to an offshore special-shaped pedestal structure. Background Art

[0002] The cap foundation is a common foundation form in bridge construction, port terminal construction and offshore wind power construction. The high-pile cap foundation usually adopts two traditional construction processes: the overall prefabrication of the cap or the steel hanging box assisted cast-in-place construction. With the continuous innovation and leapfrog development of construction technology, large-span offshore cap foundations are often large in size and weight. The overall hoisting of the prefabricated cap is difficult due to weight restrictions on construction hoisting equipment. Therefore, large-volume special-shaped cap structures are generally not suitable for direct use of overall prefabricated structures. In addition, the cross-section of offshore special-shaped caps is mostly irregular in space and has arc corners. When cast-in-place construction is adopted, in addition to the difficulty of casting the cap shape in place, the appearance quality of the concrete cannot be guaranteed. In addition, the corresponding steel hanging box design is complicated, the amount of steel used is large, and it cannot be used repeatedly. Utility Model Content

[0003] An object of the present invention is to solve at least the above problems and to provide at least the advantages which will be described below.

[0004] In order to achieve these purposes and other advantages according to the utility model, there is provided an offshore special-shaped pedestal structure, comprising: a prefabricated pedestal shell and a reinforced concrete structure cast in the prefabricated pedestal shell; the prefabricated pedestal shell is a concrete thin-walled structure, which comprises a lower shell and an upper shell; the horizontal cross-section shape of the upper shell and the lower shell is elliptical; the bottom of the lower shell is reserved with an embedded hole for inserting a pile foundation, and a concrete sealing layer is arranged between the top of the pile foundation and the embedded hole.

[0005] Preferably, the upper shell includes a main body matching the shape of the lower shell and a platform arranged on the top of the main body, the horizontal cross-section of the platform is elliptical, and the projection area of ​​the platform on the horizontal plane is larger than the projection area of ​​the main body on the horizontal plane.

[0006] Preferably, the upper shell is formed by butting a left shell and a right shell, and a wet joint is provided between the left shell and the right shell.

[0007] Preferably, it further comprises a plurality of position-limiting steels, one end of each position-limiting steel is fixedly connected to the top of the inner wall of the lower shell, and the other end of each position-limiting steel is fixedly connected to the bottom of the inner wall of the upper shell.

[0008] Preferably, connecting steel plates are pre-buried on the inner walls of the upper shell and the lower shell at locations corresponding to the connections with the limiting steel profiles.

[0009] Preferably, it also includes a staircase which rises in a spiral shape along the outer circumference of the prefabricated platform shell; the staircase includes a lower staircase, an upper staircase and a platform portion connecting the lower staircase and the upper staircase; the lower staircase and the platform portion are fixedly arranged on the outer circumference of the lower shell, and the top surface of the platform portion is flush with the top surface of the lower shell; the upper staircase is fixedly arranged on the outer circumference of the upper shell, and the top is connected to the platform.

[0010] The utility model at least has the following beneficial effects:

[0011] The offshore special-shaped pedestal structure provided by the utility model adopts a prefabricated pedestal shell to replace the traditional steel hanging box as a water retaining structure and formwork, which improves the appearance quality of the pedestal structure while ensuring the quality of the main structure; and the prefabricated pedestal shell is further divided into a lower shell and an upper shell, and the layered hoisting solves the hoisting difficulty problem caused by the large size and weight of the large-span offshore special-shaped pedestal foundation, reduces the construction difficulty of the special-shaped pedestal, and effectively improves the construction efficiency of the special-shaped pedestal; the cast-in-place reinforced concrete structure reduces the investment in large hoisting equipment, reduces the requirements for the hoisting capacity of the hoisting equipment and the hoisting risk on site.

[0012] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the offshore special-shaped cap structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the structure of the lower shell of the utility model;

[0015] Figure 3 It is a schematic diagram of the structure of the upper shell of the utility model;

[0016] Figure 4 It is a schematic diagram of the structure of the left shell and the right shell of the utility model;

[0017] Figure 5 It is a schematic diagram of the vertical cross-section structure of the offshore special-shaped cap structure of the utility model; DETAILED DESCRIPTION

[0018] The present invention will be further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0019] It should be noted that the experimental methods described in the following embodiments are conventional methods unless otherwise specified, and the reagents and materials are commercially available unless otherwise specified; in the description of the present invention, the terms "lateral", "longitudinal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0020] like Figures 1 to 5 As shown, the utility model provides an offshore special-shaped cap structure, comprising: a prefabricated cap shell 2 and a reinforced concrete structure 3 cast in place in the prefabricated cap shell; the prefabricated cap shell 2 is a concrete thin-walled structure, which comprises a lower shell 21 and an upper shell 22; the horizontal cross-sectional shape of the upper shell 22 and the lower shell 21 is elliptical; the bottom of the lower shell 21 is reserved with an embedded hole 211 for inserting the pile foundation 1, and a concrete sealing layer is arranged between the top of the pile foundation 1 and the embedded hole 211.

[0021] In this technical solution, the prefabricated pedestal shell 2 is used to replace the traditional steel hanging box as a water retaining structure and formwork, which improves the appearance quality of the pedestal structure and ensures the quality of the main structure. In addition, the prefabricated pedestal shell 2 is divided into the lower shell 21 and the upper shell 22. The layered hoisting solves the problem of difficulty in hoisting of large-span offshore pedestal foundations due to large size and weight, and reduces the construction difficulty of special-shaped pedestals. The cast-in-place reinforced concrete structure 3 reduces the investment in large hoisting equipment, reduces the requirements for the hoisting capacity of the hoisting equipment and the risk of hoisting on site. The lower shell 21 and the upper shell 22 are cast in place to form the corresponding lower core-filled concrete 31 and upper core-filled concrete 32, respectively. The lower core-filled concrete 31 and the upper core-filled concrete 32 and the internal steel skeleton together constitute the reinforced concrete structure 3. The embedded holes 211 are arranged in a one-to-one correspondence with the pile foundation 1. During the construction of the offshore special-shaped cap structure, after the pile foundation 1 is constructed, a supporting corbel can be installed on each pile foundation 1, and a sealing concrete template can be set on the supporting corbel as the bottom plate when the concrete sealing layer is poured. Then, the lower shell 21 is hoisted to the designed position, and the concrete sealing layer is poured. Then, the internal steel bars are tied inside the lower shell 21, and the lower core-filling concrete 31 is poured. After the upper shell 22 is hoisted to the designed position, it is fixedly connected to the lower shell 21. Then, the internal steel bars of the upper shell 22 are tied, and the upper core-filling concrete 32 is poured to obtain the offshore special-shaped cap structure.

[0022] In another embodiment, the upper shell 22 includes a main body 221 that matches the shape of the lower shell 21 and a platform 222 arranged on the top of the main body 221, and the horizontal cross-sectional shape of the platform 222 is elliptical, and the projection area of ​​the platform 222 on the horizontal plane is larger than the projection area of ​​the main body 21 on the horizontal plane.

[0023] The upper shell 22 can be prefabricated as a whole, and can be further prefabricated in blocks in the horizontal plane to further reduce the difficulty of hoisting the prefabricated foundation shell 2 and reduce the hoisting capacity requirements of the hoisting equipment; specifically, the upper shell is formed by docking the left shell 224 and the right shell 225, and a wet joint 226 is provided between the left shell 224 and the right shell 225. When hoisting the upper shell 22, the left shell 224 and the right shell 225 are hoisted in turn, and the two are temporarily fixed as a whole before removing the hoisting equipment; after the upper shell 22 and the lower shell 21 are fixed, the wet joint 226 is constructed. Then, the internal steel bars of the upper shell 22 are tied, and the upper core-filling concrete 32 is poured.

[0024] In another embodiment, a plurality of limiting steels 4 are further included, one end of the limiting steel 4 being fixedly connected to the top of the inner wall of the lower shell 21, and the other end being fixedly connected to the bottom of the inner wall of the upper shell 22. After the lower shell 21 is hoisted to the designed position and fixed to the pile foundation 1, the limiting steel 4 is installed on the top of its inner wall, and then when the upper shell 22 is subsequently hoisted to the designed position, the bottom of the inner wall of the upper shell 22 is fixedly connected to the other end of the limiting steel 4. The limiting steel 4 connects the lower shell 21 and the upper shell 22 as a whole to avoid displacement when pouring the upper core-filling concrete 32.

[0025] In order to facilitate the installation and fixation of the limiting steel 4 , when the upper shell 22 and the lower shell 21 are prefabricated, connecting steel plates 5 are pre-buried on the inner walls of the upper shell 22 and the lower shell 21 at the connection positions corresponding to the limiting steel 4 .

[0026] In another embodiment, a staircase is further included, which rises in a spiral shape along the outer circumference of the prefabricated pedestal shell 2; the staircase includes a lower staircase 212, an upper staircase 223, and a platform portion 213 connecting the lower staircase 212 and the upper staircase 223; the lower staircase 212 and the platform portion 223 are fixedly arranged on the outer circumference of the lower shell 21, and the top surface of the platform portion 213 is flush with the top surface of the lower shell 21; the upper staircase 223 is fixedly arranged on the outer circumference of the upper shell 22, and the top is connected to the platform 222. Through the staircase, construction workers can reach the platform 222 from the bottom of the prefabricated pedestal shell 2 along the lower staircase 212, the platform portion 213 and the upper staircase 223 in sequence.

[0027] Although the implementation scheme of the utility model has been disclosed as above, it is not limited to the applications listed in the specification and implementation modes. It can be fully applied to various fields suitable for the utility model. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. An offshore special-shaped cap structure, characterized in that: include: A prefabricated pedestal shell and a reinforced concrete structure cast in the prefabricated pedestal shell; the prefabricated pedestal shell is a concrete thin-walled structure, which includes a lower shell and an upper shell; the horizontal cross-section shape of the upper shell and the lower shell is elliptical; the bottom of the lower shell is reserved with an embedded hole for the pile foundation to be inserted, and a concrete sealing layer is provided between the top of the pile foundation and the embedded hole.

2. The offshore special-shaped platform structure according to claim 1, characterized in that: The upper shell includes a main body matching the shape of the lower shell and a platform arranged on the top of the main body. The horizontal cross-section of the platform is elliptical, and the projection area of ​​the platform on the horizontal plane is larger than the projection area of ​​the main body on the horizontal plane.

3. The offshore special-shaped cap structure according to claim 2, characterized in that: The upper shell is formed by butting a left shell and a right shell, and a wet joint is arranged between the left shell and the right shell.

4. The offshore special-shaped cap structure according to claim 1, characterized in that: It also includes a plurality of position-limiting steels, one end of which is fixedly connected to the top of the inner wall of the lower shell, and the other end of which is fixedly connected to the bottom of the inner wall of the upper shell.

5. The offshore special-shaped cap structure according to claim 4, characterized in that: Connecting steel plates are pre-buried on the inner walls of the upper shell and the lower shell at locations corresponding to the connection with the limiting steel.

6. The offshore special-shaped cap structure according to claim 2, characterized in that: It also includes a staircase, which rises in a spiral shape along the outer circumference of the prefabricated platform shell; the staircase includes a lower staircase, an upper staircase and a platform portion connecting the lower staircase and the upper staircase; the lower staircase and the platform portion are fixedly arranged on the outer circumference of the lower shell, and the top surface of the platform portion is flush with the top surface of the lower shell; the upper staircase is fixedly arranged on the outer circumference of the upper shell, and the top is connected to the platform.

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