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Pile prepressing method of four-pile-leg self-elevating platform

A self-elevating platform and pile leg technology, applied in water conservancy projects, artificial islands, underwater structures, etc., can solve the problems of long operation preparation time and operation risks, shorten operation time, save operation preparation time, The effect of increasing safety

Active Publication Date: 2017-10-20
CHINA INTERNATIONAL MARINE CONTAINERS (GROUP) CO LTD +2
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Problems solved by technology

[0008] The purpose of the present invention is to provide a method for preloading piles of a self-elevating platform with four legs, which solves the problems of long preparation time and operation risks in the prior art

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  • Pile prepressing method of four-pile-leg self-elevating platform
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  • Pile prepressing method of four-pile-leg self-elevating platform

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Embodiment Construction

[0027] Typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention is capable of various changes in different embodiments without departing from the scope of the present invention, and that the description and illustrations therein are illustrative in nature and not limiting. this invention.

[0028] The invention provides a method for preloading piles of a self-elevating platform with four legs. The method mainly includes the following steps:

[0029] S10: platform stake positioning; combination figure 2 , in this step, make the platform reach the predetermined sea area, keep the main hull 1 of the platform floating in the sea water, and lower the four legs 2 of the platform until the spud cans 3 at the bottom of each leg 2 are positioned on the seabed.

[0030] S20: Keep the main hull 1 floating in the sea water, make the two legs 2 on one ...

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Abstract

The invention provides a pile prepressing method of a four-pile-leg self-elevating platform. The pile prepressing method comprises the steps that S10, platform pile inserting locating is carried out; S20, a platform main ship body is kept in a state of floating in seawater, two pile legs on one diagonal line of the platform are in a supporting state so as to keep relatively fixed with the main ship body, and meanwhile two pile legs on the other diagonal line are in a lifting state so as to descend relative to the main ship body so that the two pile legs can be pressed down towards the seabed; and S30, the ascending and descending state of the main ship body is monitored, when the main ship body slightly ascends, the two pile legs originally in the lifting state are converted to the supporting state, the two pile legs originally in the supporting state are converted to the lifting state, and the step is repeated till the load of each pile leg is not smaller than a load set value. According to the method, the work time of pile prepressing can be shortened, and the work safety of pile prepressing can be improved.

Description

technical field [0001] The invention relates to the technical field of self-elevating platforms, in particular to a method for preloading piles of four-leg self-elevating platforms. Background technique [0002] In order not to cause the jack-up platform to continue to sink or even suddenly sink (puncture) due to the vibration caused by drilling machinery, etc., the overturning moment caused by external environmental forces such as wind, waves and currents, etc., resulting in serious tilting or even toppling of the platform, etc. In the event of a dangerous phenomenon, after the piles are placed in place on the platform and before they are lifted to the specified height according to the operation requirements, all pile legs must be preloaded so that the load on the foundation soil under the pile legs can reach and exceed the storm state in advance the maximum axial force that may occur. [0003] Therefore, the preloading operation is extremely important to the safe use of t...

Claims

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Application Information

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IPC IPC(8): E02B17/00E02B17/04
CPCE02B17/00E02B17/04
Inventor 宋述占傅强张健效李树敏尹秀凤王如壮李浩杰李磊韩华伟张工
Owner CHINA INTERNATIONAL MARINE CONTAINERS (GROUP) CO LTD
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