Abstract：A new method is presented for monitoring the support st ructure of deep excavation by using digital close2range photogrammet ry. It only uses an amateur camera (non2met ric camera) with no need for fixed exposure stations and survey cont rol point s. The method is not rest ricted by site conditions. The mean square error of 32D monitoring deformation is about ±3 mm ,which can supply reliable information for the safety of foundation con2 st ruction and adjacent buildings.
