High pressure water jet assisted power pile sinking construction method and pile sinking system on offshore platform
A high-pressure water jet, offshore platform technology, applied in sheet pile wall, foundation structure engineering, construction, etc., can solve the problem of unsuitable sea-based platform pile driving, solve the pile driving difficulties, reduce water consumption, save water The effect of water resources
Inactive Publication Date: 2015-09-30
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology
Although the above methods can solve the problem of passing through the hard layer in the process of static pressure pile sinking, they are not suitable for pile sinking operations on sea-based platforms
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[0027] Such as figure 1 and figure 2 As shown together, the high-pressure water jet-assisted power pile sinking construction method of the offshore platform in this embodiment includes the following steps in sequence:
[0028] (1) The pile body is in place: the pile body 2 is a steel pipe pile. First, the center line is drawn on the steel pipe pile, and the dimension line is drawn on the pile wall of the steel pipe pile, so as to center and control the driving. depth. Rely on the guide frame of the piling barge 1, determine the piling position from two directions with theodolite, move the piling barge 1, align the pile position, and drive in according to the position, verticality or inclination angle required by the design. At the initial stage of pile driving, it is necessary to test drive first. After determining the center position and angle of the pile, it is transferred to the formal pile driving.
[0029] (2) Before the pile sinking construction, the high-pressure wa...
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The invention discloses an ocean platform high-pressure water jet assisted power pile-sinking construction method and a pile-sinking system; the method comprises the steps of: putting a pile shaft in place, settling a high-pressure water jet nozzle into the pile shaft, supplying high-pressure water for performing loosing, ground breaking and punching by the high-pressure water jet nozzle, enabling the high-pressure water jet nozzle and the pile shaft to sink synchronously, lifting the high-pressure water jet nozzle out of the pile shaft after the pile shaft reaches a supporting layer, performing power pile-sinking operation continuously to be in a designed depth and the like. The pile-sinking system comprises a high-pressure water jet nozzle, a water supply pipe, a mud pump, a mud pool, a settling pond, a slagging pump and a return pipe which are sequentially connected. During power pile-sinking construction of an ocean platform pile foundation, the method and the system in the invention are adopted, so that the high-pressure water jet is utilized to eliminate soil plugging phenomenon inside the pile shaft, the pile-sinking frictional resistance is reduced, the intensity of a ground layer is reduced by disturbance of soil at the pile end, and platform pile foundation construction can be completed in a high-efficiency and high-quality manner.
Description
technical field [0001] The invention relates to the technical field of offshore platform pile foundation construction, in particular to a high-pressure water jet-assisted power pile sinking construction method for an offshore platform and a pile sinking system for implementing the method. Background technique [0002] Pile foundation is the most widely used foundation form in offshore platform construction. Due to the long pile body of the offshore platform and the large water load, how to realize efficient and rapid pile sinking is an important problem in pile foundation construction. At present, the hammering method is mainly used for pile foundation construction on offshore platforms. However, there are still many problems in pile sinking by hammering method, such as: "soil plug" is easy to form during the pile sinking process, and the friction resistance of pile sinking increases, resulting in an increase in the number of hammering and hammer rejection; The number of b...
Claims
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IPC IPC(8): E02D7/26
Inventor 朱丽红王瑞和倪红坚周卫东邹德永张卫东周名芳黄勇陈新勇张再华
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)