Operation Method of Cylindrical Pile Leg Rotation at Fixed Angle

Abstract

The invention relates to the technical field of ship work, and discloses a cylinder type pile leg fixed-angular rotating operation method. The cylinder type pile leg fixed-angular rotating operation method comprises the steps of arranging multiple lifting lugs on the peripheral wall close to a gravity center of a cylinder type pile leg, paving a support rail on the ground, arranging a limiting block at one end of the support rail, utilizing a steel wire rope of a hoisting device for fixing the pile leg, slowly hoisting the pile leg onto the support rail on the premise of ensuring the balance of the pile leg, ensuring one row of hole positions of bolt holes to be processed to be located on the top part of the pile leg, hooking a middle lifting hook of the hoisting device onto the lifting lug on the bottom part of the pile leg after the row of bolt holes in the top part are processed, slowly applying tensile forces onto the lifting lugs under the cooperation of a first lifting hook and a second lifting hook of the hoisting device, rotatably moving the pile leg along the support rail so as to arrive at the limiting block abutted against the support rail, and accomplishing fixed-angular rotating operation. The rotating operation method is simple and convenient to operate, low in construction cost, high in construction efficiency, and capable of effectively avoiding the potential safety hazard caused by the rotation and the turnover of the pile leg in the air.

Description

technical field [0001] The invention relates to the technical field of ship operations, in particular to a fixed-angle rotation operation method for cylindrical pile legs. Background technique [0002] In the field of offshore platform construction, pile legs are an indispensable part of every platform, and the forms of pile legs are also diverse, such as triangular truss type, octagonal truss type, cylindrical type, etc. demand, it is often designed to have pin holes on all four sides along the length direction of the pile legs. For details, please refer to Chinese patent CN206204905U-Jack-up platform and its legs (2017.05.31), and in the construction process of cylindrical pile legs Among them, the specific leg construction can be found in "Analysis of Hydraulic Lifting Leg Construction", Sun Yinhua, Zhang Tao, Zhang Hairu, Journal of Mechanical Engineers, Issue 1, 2014. Due to the limitation of cutting equipment, the pin holes on the pile legs have been opened. After one...

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Problems solved by technology

[0002] In the field of offshore platform construction, pile legs are an indispensable part of every platform, and the forms of pile legs are also diverse, such as triangular truss type, octagonal truss type, cylindrical type, etc. demand, it is often designed to have pin holes on all four sides along the length direction of the pile legs. For details, please refer to Chinese patent CN206204905U-Jack-up platform and its legs (2017.05.31), and in the construction process of cylindrical pile legs Among them, the specific leg construction can be found in "Analysis of Hydraulic Lifting Leg Construction", Sun Yinhua, Zhang Tao, Zhang Hairu, Mechanical Engineer Magazine, Issue 1, 2014, the pin holes on the pile legs were opened due to the limitation of cutting equipment at present. After one row, the pile legs need to be rotated at a certain angle before opening another row. The conventional method is to weld several pieces of lifting lugs on the leg cylinder, and use the gantry crane to turn the pile legs in the air to make them reach the specified angle. The weight of the legs is generally heavy, and there are disadvantages such as high construction cost, low construction efficiency and certain safety hazards when using aerial rotation

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