Pile Shape Restoration Method Based on Point Cloud Data

Abstract

A pile shape restoration method based on point cloud data, the method is used to obtain the pile point cloud and restore the underwater pile shape based on the point cloud, including pile point cloud measurement, pile point cloud processing and point cloud-based The shape of the pile body is restored, specifically, the point cloud of the pile body is measured by the #-shaped or circular wiring method, and then the hull coordinate system is established, and the geographic coordinates of the beam footprint are obtained through the hull coordinate system, and finally the intersection method and the least square method are used for programming. The 7 parameters of the cylindrical surface of the fitted pile are obtained, the equation of the pile is obtained, and the shape of the pile is restored. This method uses multi-beam bathymetry to obtain point cloud data and then restores the shape of the pile. It does not need to take into account the propagation distance limitation brought by the water environment to optical measurement, and also avoids the cumbersome and high-tech method used to restore the target shape underwater based on optical measurement. The cost operation method improves work efficiency and precision, and ensures safety, which has important practical significance.

Description

Technical field [0001] The present invention relates to the field of underwater pile measurement, in particular, a pile-based shape restoration method based on point cloud data. Background technique [0002] In the marine engineering construction of marine wind power, marine bridge, first need to enter the column pile in the sea, the project support structure of the composition is required, and two piles are connected under water under the deep water area. Therefore, the positional accuracy of the piles after piling is directly related to the project implementation and its safety. Local pile construction is far from the land, the water depth value of the top surface of the pile is still large, and most of the piles are buried by seawater, it is difficult to assess the piles underwater, and then evaluate the quality of the pile installation. [0003] At present, the target recovery is achieved by optical image or laser point cloud mode; optical imaging is mainly rehabilized by mea...

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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