A method for fixing and cutting suction piles for loading and unloading

Abstract

The invention discloses a suction pile loading, fixing and cutting method, comprising the following steps: S1: slotting the bottoms of a plurality of fixed horse plates arranged on the suction piles; S2: designing and determining cutting lines, and marking the cutting lines for the fixed horse plates; S3: designing a cutting sequence of the fixed horse plates; S4: cutting the fixed horse plates along the cutting lines according to the cutting sequence; a safe and efficient suction pile loading, fixing and cutting method is provided, which avoids the risks of scratching and jamming of traditional vertical cutting, and at the same time, due to the protection of the fixed horse plates after cutting, the safety of barge cutting construction workers is guaranteed, and the installation efficiency of the suction piles is improved by optimizing the cutting sequence.

Description

Technical Field

[0001] The invention relates to the field of offshore petroleum engineering, and in particular to a method for fixing and cutting suction piles on board ships. Background Art

[0002] As my country's offshore oil and gas resource development gradually moves towards deep water, the application of suction pile-type underwater structure foundations has gradually matured. Suction piles have broad application prospects in the development of deepwater oil and gas fields due to their high installation efficiency and flexible installation resources. Suction piles are generally transported to the offshore installation site by barges / operating ships. During transportation, they are fixed on the deck by horse plate welding. They need to be cut to release the fixation before formal lifting and launching.

[0003] However, the traditional vertical cutting method has obvious disadvantages. During the lifting process, the horse plate will rub against the suction pile body or even get stuck, causing the suction pile to be unstable or even sway during the lifting process, and it may also cause the crane load to increase and then suddenly decrease. The suction pile itself is high, and the risk during lifting is very high. The vertical cutting method makes it unstable. If the suction pile is cut in both vertical and horizontal directions, it is easy to shake, which can easily cause injuries to construction workers and cause safety accidents. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a method for cutting a fixed horse plate on a suction pile.

[0005] In order to solve the above technical problems, the present invention provides a method for fixing and cutting suction piles on a ship, comprising the following steps:

[0006] S1: slotting the bottoms of multiple fixed horse plates arranged on the suction piles;

[0007] S2: Design and determine the cutting line, and mark the cutting line of the above-mentioned fixed horse plate;

[0008] S3: Design the cutting sequence of the fixed horse board;

[0009] S4: cutting the fixed horse plate along the above cutting line according to the cutting order;

[0010] According to a preferred embodiment of the present invention, the width of the groove in step S1 is 90-110 mm.

[0011] According to a preferred embodiment of the present invention, the cutting line in step S2 includes a longitudinal tangent and a transverse tangent, the longitudinal tangent includes a vertical tangent and an oblique tangent, the vertical tangent is a vertical cutting line from the top of the fixed horse plate to the top of the slot at a distance of not less than 20 mm from the suction pile body, the oblique tangent is a cutting line from the top of the side of the fixed horse plate to the top of the slot; the transverse tangent is a cutting line from the middle of the side of the fixed horse plate to the slot.

[0012] According to a preferred embodiment of the present invention, when the lifting margin of the suction pile is met in step S2, the fixed horse plate is only delineated with a longitudinal tangent.

[0013] According to a preferred embodiment of the present invention, when the lifting margin of the suction pile is insufficient in step S2, the fixed horse plate is defined with a longitudinal tangent and a transverse tangent.

[0014] According to a preferred embodiment of the present invention, when the suction pile lifting height margin is met in step S3, the cutting sequence is to first cut all the longitudinal tangents on half of the fixed horse plates at intervals before berthing, and then cut all the longitudinal tangents on the remaining half of the fixed horse plates after berthing.

[0015] According to a preferred embodiment of the present invention, when the lifting height margin of the suction pile is insufficient in step S3, the cutting sequence is to first cut all the longitudinal tangents on half of the fixed horse plates at intervals before berthing, and then cut all the longitudinal tangents on the remaining half of the fixed horse plates after berthing, and then cut the transverse tangents on the fixed horse plates close to the berthing side and the tail side of the lifting barge.

[0016] According to a preferred embodiment of the present invention, the fixed horse plate is configured as a triangular plate.

[0017] According to a preferred embodiment of the present invention, the plurality of fixed horse plates provided on the suction piles are symmetrically distributed.

[0018] The technical effects of the present invention are:

[0019] 1. The present invention provides a method for fixing and cutting suction piles for loading ships. The fixing horse plate is designed to be slotted at the bottom. The slotted design eliminates the risk of directly cutting the deck during cutting, thereby causing damage to the deck surface. The amount of welding is saved and the cutting operation is convenient. The cutting line of the fixing horse plate is delineated and the cutting sequence of the fixing horse plate is designed according to the design plan, thereby achieving the beneficial effect of cutting the fixing horse plate on the suction pile.

[0020] 2. In the method for fixing and cutting suction piles for loading on a ship, the vertical tangent line is not less than 20 mm from the suction pile body, which effectively prevents the pile body from being damaged by thermal cutting; the oblique tangent line is cut from a suitable position on the side, which increases the distance between the pile body and the fixed horse plate, reduces the probability of the pile body being scratched, and also plays a limiting role, so that the fixed horse plate becomes a limiting horse plate, and performs circumferential limiting on the suction pile during hoisting, thereby preventing the suction pile from shaking and ensuring the safety of the suction pile hoisting.

[0021] 3. The present invention provides a method for fixing and cutting suction piles for loading and unloading. Half of the fixing horse plate is cut before berthing, and the remaining half is cut after berthing. In this way, the cutting time after berthing is saved, the time for the hoisting barge to dock is reduced, the operation time of the construction ship is saved, and the construction risk is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of welding and fixing of a suction pile and a fixing plate in a method for fixing and cutting a suction pile for loading on a ship according to the present invention;

[0023] Figure 2 It is a schematic diagram of the slotted structure of the fixed horse plate of a suction pile loading fixing and cutting method of the present invention;

[0024] Figure 3 It is a schematic diagram of a fixed horse plate cutting line of a suction pile loading fixing and cutting method of the present invention;

[0025] Figure 4 It is a schematic diagram of the cutting sequence when the suction pile lifting height margin is satisfied in a method for fixing and cutting suction piles for loading on a ship according to the present invention;

[0026] Figure 5 The invention discloses a cutting sequence diagram when the lifting height margin of a suction pile is insufficient in a method for fixing and cutting a suction pile for loading on a ship.

[0027] Figure numerals: 1-suction pile; 2-fixed horse board; 3-deck; 4-groove; 5-longitudinal tangent; 6-transverse tangent; 7-vertical tangent; 8-oblique tangent. DETAILED DESCRIPTION

[0028] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the invention.

[0029] like Figures 1 to 5 As shown, a method for fixing and cutting suction piles for loading and unloading ships comprises the following steps:

[0030] S1: groove 4 is formed on the bottom of a plurality of fixed horse plates 2 arranged on the suction piles 1;

[0031] S2: Design and determine the cutting line, and mark the cutting line of the fixed horse plate 2;

[0032] S3: Design the cutting sequence of the fixed horse plate 2;

[0033] S4: cutting the fixed horse plate 2 along the cutting line according to the cutting order;

[0034] The width of the slot 4 is 90-110mm; the cutting line includes a longitudinal tangent line 5 and a transverse tangent line 6, the longitudinal tangent line 5 includes a vertical tangent line 7 and an oblique tangent line 8, the vertical tangent line 7 is a vertical cutting line from the top of the fixed horse plate 2 to the top of the slot 4 at a distance of not less than 20mm from the suction pile 1, the oblique tangent line 8 is a cutting line from the top of the side of the fixed horse plate 2 to the top of the slot 4; the transverse tangent line 6 is a cutting line from the middle of the side of the fixed horse plate 2 to the slot 4. When the lifting margin of the suction pile 1 is met, the fixed horse plate 2 is only delineated with the longitudinal tangent line 5, and the cutting order is to cut all the longitudinal tangent lines 5 on half of the fixed horse plate 2 at intervals before docking. When the lifting margin of the suction pile 1 is insufficient, the fixed horse plate 2 is marked with longitudinal tangents 5 and transverse tangents 6. The cutting sequence is to cut all the longitudinal tangents 5 on half of the fixed horse plates 2 at intervals before berthing, and then cut all the longitudinal tangents 5 on the remaining half of the fixed horse plates 2 after berthing, and then cut the transverse tangents 6 on the fixed horse plates 2 close to the berthing side and the tail side of the lifting barge.

[0035] like Figure 1 As shown, the suction pile 1 is fixed on the ship, and the fixed horse plate 2 is designed as a triangular plate. Usually, the pile body and the deck 3 are welded together with a fixed horse plate 2 that is symmetrical around the four sides to maintain stability. The present invention uses a fixed horse plate 2 with a slot 4 at the bottom as a welding fixing structure. The width of the slot 4 is set to about 100mm, and the height is calculated according to the stability. Figure 2 shown.

[0036] like Figure 3 As shown, the design of the fixed horse plate 2 adopts marking to formulate the cutting path, and the line can be marked in advance with a white pen during loading. The vertical cutting line 7 is 20mm away from the pile body of the suction pile 1 to avoid damaging the pile body during thermal cutting, and the oblique cutting line 8 is the top of the notch from the side to the bottom.

[0037] like Figure 4 As shown, when the hoisting margin is met, only the longitudinal tangent 5 needs to be cut, and the fixed horse plates 2 (usually 8 pieces) of the suction pile 1 are set to be symmetrically welded. Before berthing, half of the fixed horse plates 2 are cut at intervals, and the remaining half is cut after berthing. Before berthing during offshore construction, the fixed horse plates 2 in the box are cut first, and the remaining fixed horse plates 2 are cut after berthing.

[0038] like Figure 5 and Figure 3As shown, when the lifting height margin is insufficient, after completing the above-mentioned longitudinal tangent 5 cutting, it is also necessary to cut the transverse tangent 6 ( Figure 5 The fixed horse plate 2 in the box can meet the lifting height requirement, and the lifting barge can leave the working ship from the bow direction, which can maintain the circumferential limit of the suction pile 1, and the lifting height can meet the requirement, and reduce the cutting workload of the fixed horse plate 2.

[0039] The above-described embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Equivalent substitutions or changes made by those skilled in the art based on the present invention are within the protection scope of the present invention. The protection scope of the present invention shall be subject to the claims.

Claims

1. A method for fixing and cutting suction piles for loading on a ship, characterized in that: The following steps are involved: S1: slotting the bottoms of multiple fixed horse plates arranged on the suction piles; S2: Design and determine the cutting line, and mark the cutting line of the above-mentioned fixed horse plate; S3: Design the cutting sequence of the fixed horse board; S4: cutting the fixed horse plate along the above cutting line according to the cutting order; The cutting line in step S2 includes a longitudinal tangent and a transverse tangent, wherein the longitudinal tangent includes a vertical tangent and an oblique tangent, wherein the vertical tangent is a vertical cutting line from the top of the fixed horse plate to the top of the slot at a distance of not less than 20 mm from the suction pile body, and the oblique tangent is a cutting line from the top of the side of the fixed horse plate to the top of the slot; the transverse tangent is a cutting line from the middle of the side of the fixed horse plate to the slot; In step S2, when the lifting margin of the suction pile is satisfied, the fixed horse plate is only delineated with a longitudinal tangent line; In step S2, when the lifting margin of the suction pile is insufficient, the fixed horse plate is demarcated with a longitudinal tangent and a transverse tangent; In step S3, when the lifting margin of the suction pile is satisfied, the cutting sequence is to cut all longitudinal tangents of half of the fixed horse plates at intervals before berthing, and then cut all longitudinal tangents of the remaining half of the fixed horse plates after berthing; In step S3, when the lifting height margin of the suction pile is insufficient, the cutting sequence is to cut all the longitudinal tangents on half of the fixed horse plates at intervals before berthing, and then cut all the longitudinal tangents on the remaining half of the fixed horse plates after berthing, and then cut the transverse tangents on the fixed horse plates close to the berthing side and the tail side of the lifting barge.

2. A method for fixing and cutting suction piles for loading and unloading ships according to claim 1, characterized in that: The width of the slot in step S1 is 90-110 mm.

3. A method for fixing and cutting suction piles for loading on a ship according to claim 1, characterized in that: The fixed horse plate is arranged in the form of a triangle plate.

4. A method for fixing and cutting suction piles for loading on a ship according to claim 1, characterized in that: The plurality of fixed horse plates provided on the suction piles are symmetrically distributed.

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