CN-117227906-B - Method for constructing marine artificial island cofferdam

Abstract

The invention relates to a steel cylinder marine transportation method and a marine artificial island cofferdam construction method, and belongs to the technical field of hydraulic engineering. The steel cylinder marine transportation method comprises the steps of loading a fixing device on a transportation ship, wherein the fixing device comprises a pedestal fixed on the transportation ship and fixing components used for fixing the steel cylinders, the pedestal comprises a plurality of layers of supporting tables which are sequentially arranged from bottom to top, a plurality of fixing components are arranged on each layer of supporting tables, steel cylinders with different diameters are correspondingly hoisted on each layer of supporting tables of the fixing device, one steel cylinder is hoisted on each layer of supporting tables, when the steel cylinder is hoisted, the steel cylinder positioned on the lower layer is sleeved outside the supporting tables and the steel cylinders on the adjacent upper layer, after one steel cylinder is hoisted, the steel cylinder is fixed by the fixing components, and after all the hoisted steel cylinders are fixed, the steel cylinder is transported to a construction water area through the transportation ship. The steel cylinder marine transportation method can transport a plurality of steel cylinders once, and the transportation efficiency of the steel cylinders is obviously improved.

Inventors

• LI YIYONG
• DU CHUANG

Assignees

• 中交第一航务工程局有限公司

Dates

Publication Date

20260505

Application Date

20230907

Claims (6)

1. 1. The method for constructing the marine artificial island cofferdam is characterized by comprising the following steps of: Dividing a required steel cylinder into steel cylinders with different diameters and various specifications according to the shape of the artificial island cofferdam to be built; Transporting the steel cylinders with different specifications to a construction water area by adopting a steel cylinder marine transportation method; Hoisting the steel cylinders with different specifications transported by the transport ship to preset positions corresponding to the steel cylinders with different specifications for sinking so as to enclose an artificial island cofferdam by the steel cylinders, wherein the steel cylinders with different specifications are alternately arranged to enclose the artificial island cofferdam; the steel cylinder marine transportation method comprises the following steps: Loading a securing device on a transport vessel, the securing device comprising a pedestal secured to the transport vessel and a securing assembly for securing a steel cylinder; the pedestal comprises a plurality of layers of supporting tables which are sequentially arranged from bottom to top, wherein the sizes of the supporting tables are reduced from bottom to top layer by layer, so that the outer edges of the plurality of layers of supporting tables form a step shape; Correspondingly hoisting steel cylinders with different diameters to each layer of supporting tables of the fixing device from top to bottom or from bottom to top in sequence from small to large or from large to small in diameter, hoisting one steel cylinder on each layer of supporting tables, hoisting the steel cylinder to the step surface when hoisting the steel cylinder, and sleeving the steel cylinder positioned on the lower layer outside the supporting tables and the steel cylinder on the adjacent upper layer; after all the steel cylinders to be hoisted are fixed, the steel cylinders are transported to a construction water area through the transport ship.
2. 2. The method of constructing an offshore artificial island cofferdam of claim 1, wherein the steel cylinder is vertically placed on the supporting table while being hoisted.
3. 3. The method for constructing an offshore artificial island cofferdam as claimed in claim 2, wherein said fixing assembly comprises fixing clips arranged in pairs, and when said steel cylinder is hoisted, the lower end wall of said steel cylinder is placed between said fixing clips arranged in pairs so as to clamp and fix the lower end wall of said steel cylinder by said fixing clips.
4. 4. A method of constructing an offshore artificial island cofferdam as claimed in claim 3, wherein said fixing clip comprises a connecting portion disposed parallel to the table top of said supporting table and a holding portion disposed perpendicular to the table top of said supporting table, said connecting portion being fixedly connected to the table top of said supporting table, said holding portion being adapted to engage and connect the wall of said steel cylinder.
5. 5. The method for constructing the marine artificial island cofferdam according to claim 3 or 4, wherein the supporting table is cylindrical, the diameter of the cylindrical supporting table is reduced layer by layer from bottom to top, a plurality of layers of supporting tables are coaxially arranged, and a plurality of fixing assemblies positioned on the same layer of supporting tables are uniformly distributed on the step surface along the circumferential direction of the supporting tables.
6. 6. The method for constructing the offshore artificial island cofferdam according to claim 1, wherein a steel cylinder hanger is used for hanging the steel cylinder, the steel cylinder hanger comprises a hanging frame, a plurality of clamps used for clamping the upper end wall of the steel cylinder are connected to the hanging frame, the clamps are distributed in a ring shape, the clamps are connected to the hanging frame in a sliding manner so as to move along the radial direction of the ring shape relative to the hanging frame, and before the steel cylinder is hung, the clamps are moved so as to adjust the positions of the clamps to enable the positions of the clamps to be matched with the diameter of the steel cylinder to be hung.

Description

Method for constructing marine artificial island cofferdam Technical Field The invention belongs to the technical field of hydraulic engineering, in particular relates to the technical field of construction of offshore artificial islands, and particularly relates to a steel cylinder offshore transportation method and a construction method of an offshore artificial island cofferdam. Background The steel cylinder cofferdam island-making technology is a method for quickly building an artificial island in the sea, and a large-diameter steel cylinder is one of main components of the artificial island cofferdam. At present, when constructing a cofferdam of an artificial island, a steel cylinder is usually manufactured in a prefabrication factory, and then the steel cylinder is transported to a construction site of the artificial island by a transport ship. In order to facilitate the transportation of steel cylinders, some steel cylinder marine transportation fixtures have been developed (see patent CN206766286U, CN215922480U, etc.). However, the existing steel cylinder marine transportation fixing device can only fix one steel cylinder, so that a transportation ship can only transport one steel cylinder at a time, the transportation efficiency is extremely low, and the construction period of the artificial island cofferdam is seriously affected. Therefore, how to improve the transportation efficiency of the steel cylinder and shorten the construction period of the man-made island cofferdam is a technical problem which needs to be solved currently. Disclosure of Invention Aiming at the technical problems, the invention provides a steel cylinder marine transportation method and a marine man-made island cofferdam construction method, and the steel cylinder marine transportation method can transport a plurality of steel cylinders at one time, thereby remarkably improving the transportation efficiency of the steel cylinders. The invention provides a steel cylinder marine transportation method, which comprises the following steps: The device comprises a transportation ship, a fixing device, a plurality of fixing devices, a plurality of steel cylinders, a plurality of fixing device and a plurality of steel cylinder fixing device, wherein the fixing device comprises a pedestal fixed on the transportation ship and fixing assemblies used for fixing the steel cylinders; The steel cylinders with different diameters are correspondingly hoisted to each layer of supporting tables of the fixing device from top to bottom or from bottom to top in sequence from small to large or from large to small in diameter, and one steel cylinder is hoisted on each layer of supporting tables; After all the steel cylinders to be hoisted are fixed, the steel cylinders are transported to a construction water area through a transport ship. In some of these embodiments, the steel cylinder is lifted so that its axis is placed on the support table in a vertical state. In some embodiments, the fixing assembly comprises fixing clamping pieces arranged in pairs, and when the steel cylinder is hoisted, the lower end cylinder wall of the steel cylinder is placed between the fixing clamping pieces arranged in pairs so as to clamp and fix the lower end cylinder wall of the steel cylinder by the fixing clamping pieces. In some embodiments, the fixing clamp comprises a connecting part arranged parallel to the table top of the supporting table and a clamping part arranged perpendicular to the table top of the supporting table, wherein the connecting part is fixedly connected to the table top of the supporting table, and the clamping part is used for fitting and connecting the wall of the steel cylinder. In some embodiments, the supporting table is cylindrical, the diameter of the cylindrical supporting table is reduced from bottom to top layer by layer, the multiple layers of supporting tables are coaxially arranged, and a plurality of fixing components positioned on the same layer of supporting table are uniformly distributed on the step surface along the circumferential direction of the supporting table. In some embodiments, the steel cylinder is hoisted by a steel cylinder hoisting tool, the steel cylinder hoisting tool comprises a hoisting frame, a plurality of clamps used for clamping the upper end wall of the steel cylinder are connected to the hoisting frame, the clamps are distributed in a ring shape, are connected to the hoisting frame in a sliding mode to move relative to the hoisting frame along the radial direction of the ring shape, and before the steel cylinder is hoisted, the clamps are moved to adjust the positions of the clamps so that the positions of the clamps are matched with the diameters of the steel cylinder to be hoisted. Besides, the invention also provides a method for constructing the marine artificial island cofferdam, which comprises the following steps: Dividing a required steel cylinder into steel cylinders with different diamete