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Applicability of Photogrammetry for Inspection and Monitoring of Dry-Stone Masonry Retaining Walls
Transportation Research Record: Journal of the Transportation Research Board ( IF 1.6 ) Pub Date : 2020-06-30 , DOI: 10.1177/0361198120929184
Alexandra Hain 1 , Arash E. Zaghi 1
Affiliation  

Dry-stone masonry retaining walls are vulnerable to bulging and leaning because of the lack of cohesion between stones. Currently, the structural integrity of these walls is mainly assessed by qualitative judgments informed by visual inspections. Photogrammetry has the potential to increase the quality and objectivity of retaining wall inspections. This technology uses a series of images to generate a detailed 3D model of a structure. Currently, this technology is most commonly used in civil engineering applications for mapping large areas, often using aerial photographs. In this study, photogrammetry is used in two field trials to evaluate its ability to create accurate, high-resolution 3D representations of masonry retaining walls in Connecticut. The 3D models were used to document the current in-situ conditions to provide a baseline for future comparisons, as well as show cross sections of vulnerable areas, such as bulges or tilts. In one trial, data were collected on two dates to show the progression of movement of the wall. This paper gives an overview of best practices for data collection and discusses results and observations from the field trials. The generated 3D models provide an enhanced form of inspection documentation including detailed representations of geometry and colors. The contribution of this paper is to provide material facilitating the adoption of this promising technology for the inspection of masonry retaining walls and other transportation infrastructure.



中文翻译:

摄影测量法在干砌石挡土墙检查和监控中的适用性

由于石头之间缺乏内聚力,干石砌筑的挡土墙很容易膨胀和倾斜。目前,这些墙的结构完整性主要是通过目视检查得出的定性判断来评估的。摄影测量法有可能提高挡土墙检查的质量和客观性。该技术使用一系列图像来生成结构的详细3D模型。当前,该技术最常用于土木工程应用中,通常使用航拍照片绘制大面积地图。在这项研究中,摄影测量法被用于两个现场试验中,以评估其在康涅狄格州砌体挡土墙上创建准确,高分辨率的3D表示的能力。3D模型用于记录当前的现场状况,为将来的比较提供基准,并显示脆弱区域的横截面,例如凸起或倾斜。在一项试验中,在两个日期收集了数据,以显示墙的运动进程。本文概述了数据收集的最佳做法,并讨论了现场试验的结果和观察结果。生成的3D模型提供了检查文档的增强形式,包括几何图形和颜色的详细表示。本文的作用是提供材料,以便利采用这种有前途的技术来检查砌体挡土墙和其他运输基础设施。在两个日期收集了数据,以显示墙的移动进度。本文概述了数据收集的最佳做法,并讨论了现场试验的结果和观察结果。生成的3D模型提供了检查文档的增强形式,包括几何图形和颜色的详细表示。本文的作用是提供材料,以便利采用这种有前途的技术来检查砌体挡土墙和其他运输基础设施。在两个日期收集了数据,以显示墙的移动进度。本文概述了数据收集的最佳做法,并讨论了现场试验的结果和观察结果。生成的3D模型提供了检查文档的增强形式,包括几何图形和颜色的详细表示。本文的作用是提供材料,以便利采用这种有前途的技术来检查砌体挡土墙和其他运输基础设施。生成的3D模型提供了检查文档的增强形式,包括几何图形和颜色的详细表示。本文的作用是提供材料,以便利采用这种有前途的技术来检查砌体挡土墙和其他运输基础设施。生成的3D模型提供了检查文档的增强形式,包括几何图形和颜色的详细表示。本文的作用是提供材料,以便利采用这种有前途的技术来检查砌体挡土墙和其他运输基础设施。

更新日期:2020-07-01
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