Method for calculating puncture distance of self-elevating platform

Abstract

The invention discloses a method for calculating puncture distance of self-elevating platform. The method comprises the following steps: firstly, assuming a series of puncture distances, solving support forces required to be provided when puncture pile boots corresponding to the puncture distances are in static balance, generating a relation curve of the support forces and the puncture distances, and defining the relation curve as a curve A; further generating an integral curve of the curve A corresponding to the puncture distance, and defining the integral curve as a curve B; solving the soil instrumentation resistance corresponding to each puncture distance, generating a relation curve of the soil instrumentation resistance and the puncture distance, and defining the relation curve as a curve C; further generating an integral curve of the puncture distance corresponding to the curve C, and defining the integral curve as a curve D; and the puncture distance at the intersection of the curve B and the curve D is the final puncture distance of the pile shoe. The defects that the puncture process is considered as a static process and platform structure parameters are considered in existing puncture distance analysis are overcome, and a more accurate analysis and calculation method is provided.

Description

technical field [0001] The invention relates to a method for calculating the puncture distance, in particular to a method for calculating the puncture distance of a self-elevating platform. Background technique [0002] Due to the changeable geological conditions of the seabed, there will be strata that are hard at the top and soft at the bottom in some positions. Pile insertion operations under such foundation conditions will cause the risk of sudden penetration of the spud cans into the foundation, which is called puncture in the industry. With the wide application of jack-up platforms in the ocean engineering field, this kind of puncture has brought a lot of economic losses. Although the puncture accidents have decreased in the past ten years, the puncture phenomenon is still more than once a year on average. [0003] The previous studies all focused on the soil bearing capacity, ignoring the change of the counterforce of the pile foot provided by the foundation for the b...

AI Technical Summary

Problems solved by technology

The hypothetical resistance curve for piling is as follows Image 6 As shown, there is a puncture risk in this ballast according to the judgment of this algorithm, but there is no puncture risk in this ballast according to the traditional method, and the missed judgment of the puncture risk may cause platform operation accidents

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