Multi-beam underwater steel pipe pile position measuring method

Abstract

The invention discloses a multi-beam underwater steel pipe pile position measuring method. The method adopts a multi-beam depth finder, a compass movement sensor and a GPS for underwater steel pipe pile position measuring, through three steps of measuring line arranging, equipment mounting and parameter measuring, a pile body inclination parameter, top center plane and elevation coordinates and aplane distance between a four-pile guide pipe frame meeting the precision need are obtained, and steel pipe pile position measuring is achieved. According to the method, the underground measuring inspecting efficiency is improved, the influence of water depth, waves, flow speed, visibility and other factors on underground measuring inspection can be greatly reduced, meanwhile, the underground inspecting efficiency is improved, the measuring inspecting process is simplified, it is ensured that the measuring precision meets the needs, and the construction measuring cost is reduced.

Description

technical field [0001] The invention relates to the technical field of underwater steel pipe pile position measurement, in particular to a multi-beam underwater steel pipe pile position measurement method. Background technique [0002] With the large-scale development of offshore projects such as offshore wind power, the application of steel pipe piles as pile foundation mechanisms for offshore structures has become more and more popular. Offshore engineering steel pipe piles are sunk to the depths of the seabed. As the foundation support of offshore engineering structures, most of their lengths can reach 70 meters or more, and most of the tops are submerged in seawater below ten meters of sea level, which cannot be directly observed. Most of the detection methods commonly used in the world cannot be practically applied. Therefore, it is particularly important to study a detection method that can be applied to the re-measurement of steel pipe piles in deep seawater. [0003...

AI Technical Summary

Problems solved by technology

Offshore engineering steel pipe piles are sunk to the depths of the seabed. As the foundation support of offshore engineering structures, most of their lengths can reach 70 meters or more, and most of the tops are submerged in seawater below ten meters of sea level, which cannot be directly observed. Most of the detection methods commonly used in the world cannot be practically applied. Therefore, it is particularly important to study a detection method that can be applied to the re-measurement of steel pipe piles in deep sea water.

[0003] At present, in most offshore projects, the pile position measurement of underwater steel pipe piles adopts coordinate monitoring before the pile body enters the water during the pile sinking process, and more accurate pile position measurement cannot be carried out after entering the water. At the same time, the measurement of the pile top elevation is mostly calculated indirectly by measuring the pile hammer cap; while the relative position of the piles is measured underwater by divers, that is, at the top of the two steel pipe piles. Arrange a diver at each geometric center to measure with a thin steel wire in hand. Tension gauges are installed at both ends of the steel wire to ensure that the tension at both ends is the same. The distance between the two steel pipe piles can be determined by measuring the length of the steel wire. However, this method needs to consider the geometry of the top of the pile. How to determine the center and the influence of the underwater surge on the wire rope have the disadvantages of low precision and large uncertainty

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