Movable bolt structure for connecting offshore jacket leg and foundation pile

Abstract

The utility model provides a movable bolt structure for connecting offshore jacket legs and foundation piles, which comprises three or four foundation piles, jacket straight legs are arranged at the tops of the foundation piles, rubber seal heads are arranged at the bottoms of the jacket straight legs, bolt pipes are arranged between the foundation piles and the jacket straight legs, and supporting baffles are arranged in the middles of the bolt pipes. The top end of the jacket straight leg is connected with a first hanging ring, the top end of the jacket straight leg is connected with a jacket inclined leg, one side of the jacket inclined leg is connected with a second hanging ring, and a hanging rope is arranged between the first hanging ring and the second hanging ring. And high-strength grouting is arranged in annular spaces between the bolt pipe and the top section of the foundation pile and between the bolt pipe and the bottom section of the jacket straight leg. The movable bolt structure for connecting the offshore jacket leg and the foundation pile can adapt to large deviation or large perpendicularity deviation of the foundation pile during pile sinking construction, the construction precision control difficulty of the foundation pile can be remarkably reduced, the mounting success rate of a jacket can be remarkably improved, investment is saved, and the construction period is shortened.

Description

Technical Field

[0001] The utility model relates to the field of ocean engineering, in particular to a movable pin structure for connecting the leg of an offshore jacket and a foundation pile. Background Art

[0002] With the continuous increase in global energy demand, the scale of offshore oil and gas exploitation has been continuously expanding. At the same time, in order to achieve sustainable development, clean energy projects such as offshore wind power generation are also developing rapidly. The construction of these offshore engineering facilities all requires a stable and reliable foundation structure. As a common support structure, the connection between the jacket and the foundation pile is crucial.

[0003] However, the current common connection between the leg of the jacket and the foundation pile is an insert - type grouting connection where the straight leg of the jacket is inserted into the top of the foundation pile: Although the upper jacket can be successfully inserted into the lower foundation pile when the pile sinking control accuracy of the foundation pile is very high, during offshore construction, the wind is high and the waves are rough, and it is very difficult to achieve the design standard for the positioning accuracy of the foundation pile. If it exceeds slightly, the jacket cannot be inserted, resulting in the failure of jacket installation.

[0004] Therefore, it is necessary to provide a movable pin structure for connecting the leg of an offshore jacket and a foundation pile to solve the above - mentioned technical problems. Summary of the Utility Model

[0005] The utility model provides a movable pin structure for connecting the leg of an offshore jacket and a foundation pile, which solves the problem of excessive requirements for the pile sinking position and verticality control of the foundation pile during the butt - joint insertion between the leg of the jacket and the foundation pile.

[0006] To solve the above - mentioned technical problems, a movable pin structure for connecting the leg of an offshore jacket and a foundation pile provided by the utility model includes:

[0007] Three or four foundation piles, with jacket straight legs provided at the tops of the foundation piles, and rubber end caps provided at the bottoms of the jacket straight legs;

[0008] A pin tube, which is arranged between the foundation pile and the jacket straight leg. A support plate is provided in the middle of the pin tube. A first lifting ring is connected to the top of the pin tube. A jacket diagonal leg is connected to the top of the jacket straight leg. A second lifting ring is connected to the inner side of one of the jacket diagonal legs. A suspension rope is arranged between the first lifting ring and the second lifting ring, and the two ends of the suspension rope are respectively connected to the first lifting ring and the second lifting ring. High - strength mortar is filled in both the jacket straight leg and the foundation pile.

[0009] Preferably, the first lifting ring, the second lifting ring and the suspension rope are used for the flexible connection of the pin tube.

[0010] Preferably, the rubber end cap is used for the flexible displacement and grouting plugging of the dowel pipe.

[0011] Preferably, high-strength grouting is provided in the annular space between the dowel pipe and the top of the foundation pile and the bottom section of the vertical leg of the jacket.

[0012] Compared with the related technologies, an adjustable dowel structure for connecting the offshore jacket leg and the foundation pile provided by the present utility model has the following beneficial effects:

[0013] The present utility model provides an adjustable dowel structure for connecting the offshore jacket leg and the foundation pile. A first lifting ring, a second lifting ring, a suspension rope, a dowel pipe, a support baffle, and a rubber end cap are used in cooperation between the foundation pile and the vertical leg of the jacket. The dowel pipe can be displaced flexibly, can adapt to large offsets or large vertical deviations during the construction of the foundation pile, can significantly reduce the construction control difficulty of the foundation pile, can significantly improve the installation success rate of the jacket, and saves both investment and construction period. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 FIG. is a schematic structural diagram of a preferred embodiment of an adjustable dowel structure for connecting the offshore jacket leg and the foundation pile provided by the present utility model;

[0015] Figure 2 FIG. is a schematic diagram of the connection details of the entire device;

[0016] Reference numerals in the drawings: 1, dowel pipe; 2, rubber end cap; 3, suspension rope; 4, first lifting ring; 5, support baffle; 6, vertical leg of the jacket; 7, inclined leg of the jacket; 8, second lifting ring;

[0017] 10, foundation pile; 12, high-strength mortar; DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The present utility model will be further described below with reference to the drawings and embodiments.

[0019] Please refer to Figure 1 and Figure 2 , wherein, Figure 1 FIG. is a schematic structural diagram of a preferred embodiment of an adjustable dowel structure for connecting the offshore jacket leg and the foundation pile provided by the present utility model; Figure 2 FIG. is a schematic diagram of the connection details of the entire device. An adjustable dowel structure for connecting the offshore jacket leg and the foundation pile includes:

[0020] Three or four foundation piles 10, the top of each foundation pile 10 is provided with a vertical leg 6 of the jacket, and the bottom end of the vertical leg 6 of the jacket is provided with a rubber end cap 2;

[0021] The pin tube 1 is arranged between the foundation pile 10 and the vertical leg 6 of the jacket. A support plate 5 is provided in the middle of the pin tube 1. A first lifting ring 4 is connected to the top end of the pin tube 1. A diagonal leg 7 of the jacket is connected to the top end of the vertical leg 6 of the jacket. A second lifting ring 8 is connected to one side of the diagonal leg 7 of the jacket. A suspension rope 3 is arranged between the first lifting ring 4 and the second lifting ring 8. Both ends of the suspension rope 3 are respectively connected to the first lifting ring 4 and the second lifting ring 8. High-strength mortar 12 is filled in both the vertical leg 6 of the jacket and the foundation pile 10.

[0022] The first lifting ring 4, the second lifting ring 8 and the suspension rope 3 are used for the flexible connection of the pin tube 1.

[0023] The rubber head 2 is used for the left and right displacement of the pin tube 1.

[0024] The upper end of the pin tube 1 is suspended on the second lifting ring 8 in the diagonal leg 7 of the jacket through the suspension rope 3. The rubber head 2 above the support baffle 5 connects the middle of the pin tube 1 to the vertical leg 6 of the jacket. The rubber head 2 allows the pin tube 1 to displace left and right and acts as a head during grouting.

[0025] The support baffle 5 and the pin tube 1 are connected by welding.

[0026] Advantages: The movable pin structure ingeniously uses the suspension rope 3 to hang the pin tube 1 inside the jacket leg with a diameter slightly larger than itself, so that the pin tube 1 can displace flexibly. The rubber head 2 is also a flexible structure and will not restrict the displacement of the pin tube 1. Therefore, the pin tube 1 can adapt to the verticality deviation and horizontal position deviation of the underlying foundation pile 10. Of course, these deviations should be within a reasonable range. Just because of this, a high-precision control using a pile driving guide frame is not required during pile sinking, and a slightly larger verticality and horizontal position of the foundation pile are allowed. For example, the verticality is less than 0.5%, and the horizontal position deviation is less than 30 cm. These deviations can be automatically adjusted and adapted by the movable pin structure.

[0027] The working principle of a movable pin structure for connecting the jacket leg and the foundation pile in the sea provided by the present utility model is as follows:

[0028] During use, first, the jacket with the vertical leg 6 and the diagonal leg 7 of the jacket, the pin tube 1 with the support plate 5 already set, and the foundation pile 10 are processed in the factory.

[0029] After processing the jacket with the vertical leg 6 and the diagonal leg 7 of the jacket, the pin tube 1 and the foundation pile 10, one end of the suspension rope 3 is connected to the first lifting ring 4 at one end of the pin tube 1, and then the other end of the suspension rope 3 at one end of the pin tube 1 is connected to the second lifting ring 8, and then the rubber head 2 is connected to the bottom end of the vertical leg 6 of the jacket.

[0030] Then, the foundation pile 10 is constructed on the seabed by pile driving. Then, the jacket with the jacket vertical leg 6, the jacket inclined leg 7, the first lifting ring 4, the second lifting ring 8, the suspension rope 3 and the plug pipe 1 is lifted above the foundation pile 10 by a lifting device. Then, the plug pipe 1 at the bottom end of the jacket is inserted into the interior of the foundation pile 10. Finally, high-strength mortar is injected into the internal annular space between the plug pipe 1, the foundation pile 10 and the jacket vertical leg 6 through equipment.

[0031] Compared with the related technologies, the movable plug structure for connecting the offshore jacket leg and the foundation pile provided by the present utility model has the following beneficial effects:

[0032] The present utility model provides a movable plug structure for connecting the offshore jacket leg and the foundation pile. The first lifting ring 4, the second lifting ring 8, the suspension rope 3, the plug pipe 1, the support baffle 5 and the rubber head 2 are used in cooperation between the foundation pile 10 and the jacket vertical leg 6. The plug pipe 1 can be flexibly displaced, can adapt to large offsets or large verticality deviations of the foundation pile 10 during pile driving construction, can significantly reduce the difficulty of controlling the construction precision of the foundation pile 10, can significantly improve the installation success rate of the jacket, and saves both investment and construction period.

[0033] The above are only the embodiments of the present utility model, and thus do not limit the patent scope of the present utility model. Any equivalent structure or equivalent process transformation made by using the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall be similarly included in the patent protection scope of the present utility model.

Claims

1. A movable latch structure for connecting an offshore jacket leg and a foundation pile, characterized in that: include: Three or four foundation piles, each of which has a straight leg of a conductor frame on its top and a rubber seal on its bottom; A latch tube, wherein the latch tube is arranged between the foundation pile and the straight leg of the conductor frame, a support plate is arranged in the middle of the latch tube, a first lifting ring is connected to the top end of the latch tube, a conductor frame oblique leg is connected to the top end of the straight leg of the conductor frame, a second lifting ring is connected to an inner side of the oblique leg of the conductor frame, a suspension rope is arranged between the first lifting ring and the second lifting ring, two ends of the suspension rope are respectively connected to the first lifting ring and the second lifting ring, and high-strength mortar is filled inside the straight leg of the conductor frame and the foundation pile.

2. The movable latch structure for connecting an offshore jacket leg and a foundation pile according to claim 1, characterized in that: The first lifting ring, the second lifting ring and the suspension rope are used for the flexible connection of the latch tube.

3. The movable latch structure for connecting an offshore jacket leg and a foundation pile according to claim 1, characterized in that: The rubber sealing head is used for flexible displacement and grouting sealing of the latch tube.

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