| Summary: | 碩士 === 國立臺灣科技大學 === 營建工程系 === 105 === Taiwan has become highly urbanized and densely populated. To build higher
building, deep excavations are one of the crucial procedures. But deep excavations are
subject to risks. To prevent the risks, the engineer uses construction monitoring systems,
like inclinometers and surface settlement mark, for monitoring the construction site.
However, the conventional construction monitoring systems couldn’t measure the
object with 3-dimensional deformation data. On the other hand, laser scanning reforms
the monitoring systems to 3D world. Because of its ability to acquire space data in short
time, there are some cases using 3D laser scanning to monitor construction sites.
This research introduces 3D laser scanning to monitor displacement of diaphragm
walls in deep excavation. At first, we design an algorithm using point clouds to estimate
the displacement of diaphragm walls. And to implement the algorithm, we develop a
plugin of an open source software CloudCompare with C++. What’s more, to verify
our algorithm, we apply the algorithm in an excavation project to estimate the
displacement of diaphragm walls. It shows that the displacement our method estimates
is larger than expected, although the program could calculate the displacement. So, we
manage to examine the procedure used in the project to improve it. Further studies are
necessary to realize the 3D monitoring method.
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