首页|考虑夯锤姿态特性的夯沉量单目视觉测量方法研究

考虑夯锤姿态特性的夯沉量单目视觉测量方法研究

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夯沉量是反映强夯地基加固质量的关键指标,人工测量方法不仅投入高、效率低下,且施工安全无法保障.为此,基于单目摄影测量提出一种强夯夯沉量非接触测量方法,实现了强夯夯沉量的高效测算.深入分析并科学定义了适用于单目视觉监测的夯沉量定义;基于夯锤标识的旋转不变性,提取表征夯锤姿态的特征点几何信息,结合视觉成像基本原理,构建了测算夯锤三维姿态的数值方程,求解得到夯锤特征点的三维坐标;在施工现场对所提方法进行工程实测,并通过多余观测对解算结果进行优化尝试.试验及工程应用结果表明,本方法具有精度高、速度快、稳健性强等特点,可有效应用于强夯施工质量监测关键指标参数夯沉量的自动解算,为当前强夯夯沉量自动化监测技术的进步提供了一个新的方向和手段.
A monocular visual measurement method of ramming settlement considering rammer attitude characteristics
Ramming settlement is a crucial indicator for evaluating the quality of dynamic compaction foundation reinforcement.At present,it mainly relies on manual monitoring,which seriously affects the efficiency of dynamic compaction construction,and safety cannot be guaranteed.To address these issues,this study proposes a non-contact measurement method using monocular photogrammetry to accurately measure ramming settlement.The method begins by analyzing and scientifically defining the suitable definition of ramming settlement for monocular visual monitoring.Next,based on the fundamental principles of visual imaging,a numerical equation is developed to measure the three-dimensional attitude of the rammer.This is achieved by leveraging the rotation invariance of the rammer to identify geometric feature points and solve for their three-dimensional coordinates.Finally,the proposed method is then tested on the construction site,and the algorithm is optimized using the conditional adjustment method.The experimental and engineering application results demonstrate that this method offers high precision,fast processing speed,and robustness.It can effectively automate the calculation of ramming settlement,a key parameter for monitoring the quality of dynamic compaction.This research provides a new direction and means for advancing the current automatic monitoring technology of dynamic compaction.

ramming settlement monitoringmonocular photogrammetryrammer poserotation invariance

高乔裕、金银龙、刘全、张宏阳、梅龙喜

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武汉大学水资源工程与调度全国重点实验室,湖北武汉 430072

中国电建集团华东勘测设计研究院有限公司,浙江杭州 310010

夯沉量监测 单目视觉测量 夯锤位姿 旋转不变性

2024

岩土力学
中国科学院武汉岩土力学研究所

岩土力学

CSTPCD北大核心
影响因子:1.614
ISSN:1000-7598
年,卷(期):2024.45(3)
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