Construction method of anchor pile type jacket artificial island in deep sea bare rock area

Abstract

The invention provides a construction method of an anchor pile type jacket artificial island in a deep sea bare rock area, which comprises the following steps: firstly, assembling and welding single jackets into an integral truss, transporting to a construction site, and then lowering in place; then, concrete anchor piles are constructed in the two rows of steel pipe piles on the outer side, and all the single jackets and the seabed surface are connected into a whole till construction is completed, and other jackets are constructed; a steel truss partition plate is inserted between every two jackets to form an artificial island cofferdam; then, concrete is poured underwater, and a seabed surface bottom opening is closed; concrete is poured in the double walls of the anchor pile type jacket, a cap beam is constructed on the top of the jacket, then sand blowing is conducted in the artificial island cofferdam, and an artificial island is formed; and finally constructing facilities on the island. The technical problem that under the hard bed rock condition of the deep sea bare rock area, it is difficult to directly insert and drive large steel pipe piles to form the closed cofferdam of the artificial island is solved, a thought method is provided for design and construction of the artificial island in the deep sea bare rock area, and the construction efficiency is high.

Description

Technical Field

[0001] The invention belongs to the technical field of engineering construction, and in particular relates to a method for constructing an artificial island of an anchor pile-type jacket in a deep-sea bare rock area. Background Art

[0002] An artificial island at sea is an artificially constructed land at sea for the development of marine resources or for living at sea, and is divided into two categories: fixed and floating. These artificial islands are mainly used to expand existing islands, buildings or reefs, or to merge several natural islands. Sometimes they are also islands formed by independent reclamation, and a single columnar object used to support a building or structure supports its entirety. Early artificial islands were floating structures, built on watertight surfaces, or built in shallow water with wood, boulders, etc. In the prior art, the conventional scheme for the construction of artificial islands at sea is to insert and drive large steel pipe piles at the designed plane position of the artificial island at sea. However, the bedrock strength of the seabed in deep-sea bare rock areas is high, and it is difficult to directly insert and drive large steel pipe piles for artificial island construction, resulting in construction difficulties and slow project progress. Therefore, it is necessary to improve the existing construction methods. Summary of the invention

[0003] In view of this, the present invention aims to overcome the defects in the prior art and proposes a method for constructing an artificial island of an anchored pile jacket in a deep-sea bare rock area.

[0004] To achieve the above object, the technical solution created by the present invention is implemented as follows:

[0005] A method for constructing an artificial island of an anchor pile type jacket in a deep-sea bare rock area comprises the following steps:

[0006] S1. Weld the individual conductor frames into an integral truss, transport it to the construction site, and lower it into place according to the designed plane position of the artificial island;

[0007] S2. A temporary working platform is set up on the top of the jacket, and concrete anchor piles are constructed in the two rows of steel pipe piles on the outside to connect each single jacket with the seabed surface as a whole;

[0008] S3, repeating steps S1 to S2 to construct other conductor racks;

[0009] S4, hoisting steel truss diaphragms, and inserting a set of steel truss diaphragms between every two jackets, and at the same time, fixing the steel truss diaphragms with concrete anchor piles, so as to form an artificial island cofferdam with an overall closed structure around each jacket;

[0010] S5. Pour concrete underwater to seal the bottom opening of the seabed;

[0011] S6. Pour the double-wall inner concrete of the anchor pile type jacket and construct the cap beam on the top of the jacket;

[0012] S7, blowing sand inside the artificial island cofferdam to form an artificial island;

[0013] S8. Facilities on the construction island.

[0014] Furthermore, in step S1, each individual jacket is hoisted and lowered as a whole using a crane vessel.

[0015] Furthermore, in step S4, a crane ship is used to hoist the processed steel truss partition.

[0016] Further, in step S4, the catheter frames on both sides are fixed to the steel truss partitions by a locking device.

[0017] Furthermore, in step S4, the locking device simultaneously fixes the conduit frames and the steel truss partitions on both sides.

[0018] Furthermore, in step S6, the double-wall inner concrete of the anchor pile type jacket is poured in layers.

[0019] Further, in step S8, the facilities on the island include but are not limited to tunnel entrances and exits.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] The invention designs an anchor pile type conductor frame, and arranges a steel truss partition on the outside of the conductor frame, and fixes the steel truss partition to the conductor frame through a locking device, thereby forming an artificial island cofferdam, and sand can be easily blown inside the artificial island cofferdam to form an artificial island, which solves the technical problem that it is difficult to directly drive large steel pipe piles to form an artificial island closed cofferdam under hard bedrock conditions in deep-sea bare rock areas, and provides a method for the design and construction of artificial islands in deep-sea bare rock areas. This method can be used for the construction of entrances and exits of underwater tunnels, and can also be used for the construction of underwater tunnel ventilation shafts. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings constituting part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0023] Figure 1 A schematic diagram of the plan layout of the conductor frame is created for the present invention;

[0024] Figure 2 Create a schematic diagram of the facade structure for the present invention;

[0025] Figure 3 A planar structural schematic diagram is created for the present invention. DETAILED DESCRIPTION

[0026] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0028] In the description of the invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the invention can be understood according to specific circumstances.

[0029] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0030] A method for constructing an artificial island with anchor pile type jacket in deep sea bare rock area, such as Figures 1 to 3 As shown, the following steps are included:

[0031] S1. Weld a single conductor frame 1 into an integral truss, transport it to the construction site, and lower it into place according to the designed plane position of the artificial island;

[0032] S2. A temporary working platform is set up on the top of the jacket, and concrete is poured into the two outer rows of steel pipe piles 4, and concrete anchor piles are constructed to connect each single jacket with the seabed surface to form an integral anchor-pile jacket 6;

[0033] S3, repeating steps S1 to S2 to construct other anchor pile type jackets;

[0034] S4, hoisting the steel truss partition 2, and inserting the steel truss partition between every two jackets, and at the same time, fixing the steel truss partition with concrete anchor piles, so that an artificial island cofferdam with an overall closed structure is formed around each jacket;

[0035] S5. Pour concrete underwater to seal the bottom opening of the seabed;

[0036] S6. Pour the double-wall inner concrete of the anchor pile type conductor frame, and construct the cap beam on the top of the conductor frame. It should be pointed out that in this step, the cap beam above 2m at the low tide level is constructed on the top of the conductor frame by the hanging method.

[0037] S7, blowing sand in the artificial island cofferdam to form an artificial island 5;

[0038] S8. Facilities on the construction island.

[0039] In step S1, each single conductor frame is hoisted and lowered as a whole by a crane ship. In step S4, a crane ship is used to hoist the processed steel truss partition. In addition, the conductor frames on both sides are fixed to the steel truss partition by the locking device 3. In step S6, the double-wall inner concrete of the anchor pile type conductor frame is poured in layers. In step S8, the facilities on the island include but are not limited to the tunnel entrance and exit. It should be noted that the locking device has the fastening and fixing device commonly used in the prior art or is directly fixed by steel bar welding, which will not be repeated here.

[0040] The invention designs an anchor pile type conductor frame, and arranges a steel truss partition on the outside of the conductor frame, and fixes the steel truss partition to the conductor frame through a locking device, thereby forming an artificial island cofferdam, and sand can be easily blown inside the artificial island cofferdam to form an artificial island, which solves the technical problem that it is difficult to directly drive large steel pipe piles to form an artificial island closed cofferdam under hard bedrock conditions in deep-sea bare rock areas, and provides a method for the design and construction of artificial islands in deep-sea bare rock areas. This method can be used for the construction of entrances and exits of underwater tunnels, and can also be used for the construction of underwater tunnel ventilation shafts.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for constructing an artificial island with anchor pile type jacket in deep sea bare rock area, characterized in that: The steps include: S1. Weld the individual conductor frames into an integral truss, transport it to the construction site, and lower it into place according to the designed plane position of the artificial island; S2. A temporary working platform is set up on the top of the jacket, and concrete anchor piles are constructed in the two rows of steel pipe piles on the outside to connect each single jacket with the seabed surface as a whole; S3, repeating steps S1 to S2 to construct other conductor racks; S4, hoisting steel truss diaphragms, and inserting a set of steel truss diaphragms between every two jackets, and at the same time, fixing the steel truss diaphragms with concrete anchor piles, so as to form an artificial island cofferdam with an overall closed structure around each jacket; S5. Pour concrete underwater to seal the bottom opening of the seabed; S6. Pour the double-wall inner concrete of the anchor pile type jacket and construct the cap beam on the top of the jacket; S7, blowing sand inside the artificial island cofferdam to form an artificial island; S8. Facilities on the construction island.

2. The method for constructing an artificial island with anchored piles in deep-sea bare rock areas according to claim 1, characterized in that: In step S1, each jacket is hoisted and lowered as a whole by using a crane vessel.

3. The method for constructing an artificial island with anchored piles in deep sea bare rock areas according to claim 1, characterized in that: In step S4, a crane ship is used to hoist the processed steel truss partition.

4. The method for constructing an artificial island with anchored pile jackets in deep sea bare rock areas according to claim 1, characterized in that: In step S4, the catheter frames on both sides are fixed to the steel truss partitions by a locking device.

5. A method for constructing an artificial island with anchored pile jackets in deep sea bare rock areas according to claim 1 or 4, characterized in that: In step S4, the locking device simultaneously fixes the conduit frames and the steel truss partitions on both sides.

6. The method for constructing an artificial island with anchored pile jackets in deep-sea bare rock areas according to claim 1, characterized in that: In step S6, the double-wall inner concrete of the anchor pile type jacket is poured in layers.

7. The method for constructing an artificial island with anchored piles in deep sea bare rock areas according to claim 1, characterized in that: In step S8, the facilities on the island include but are not limited to tunnel entrances and exits.

Images