Abstract
Photogrammetry technology is used in the automatic deformation monitoring of foundation pit firstly and method proposed to reflect the deformation with the differences of two direction of monitoring points in the image plane. The method combined with the basic principle of photogrammetry, unified the spot observation data under monitoring camera coordinate system to calculate, simple and quick. Experiment shows that, the accuracy in X direction (horizontal direction along the pit) is superior to sub-millimeter and Z direction (the vertical direction in the pit) could achieve sub-millimeter, which can completely meet the needs of the deformation monitoring.
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