Pile body shape restoration method based on point cloud data

Abstract

A pile body shape restoration method based on point cloud data is used for obtaining pile body point cloud and restoring the shape of an underwater pile body based on the point cloud, comprises pile body point cloud measurement, pile body point cloud processing and pile body shape restoration based on the point cloud, and specifically comprises the steps that the pile body point cloud is measuredin a #-shaped or circular wiring mode, and then a ship body coordinate system is established; and finally, seven parameters for fitting the cylindrical surface of the pile body are obtained through programming by utilizing an intersection point method and a least square method, an equation of the pile body is solved, and the shape of the pile body is restored. The method adopts multi-beam soundingto obtain point cloud data so as to recover the shape of the pile body, does not need to consider propagation distance limitation of a water body environment on optical measurement, also avoids a tedious and high-cost operation method adopted for underwater target shape recovery based on optical measurement, improves the work efficiency and precision, guarantees the safety, and has important practical significance.

Description

technical field [0001] The invention relates to the technical field of underwater pile measurement, in particular to a pile shape restoration method based on point cloud data. Background technique [0002] In the construction of marine engineering such as offshore wind power and offshore bridges, it is first necessary to drive piles into the seabed to form a foundational engineering support structure. In deeper waters, two sections of piles must be connected underwater for pile casing. Therefore, the position accuracy of the pile body after piling is directly related to the implementation and safety of the project. The underwater pile construction site is far away from the land, and the water depth of the top surface of the pile is still relatively large. Most of the piles are buried by seawater, so it is difficult to evaluate the underwater shape of the piles, and then evaluate the installation and construction quality of the piles. [0003] At present, target restoration ...

AI Technical Summary

Problems solved by technology

These two methods are unable to accurately and efficiently obtain the shape of the entire underwater pile due to the light refraction, absorption attenuation and propagation distance of the seawater.

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