Stability Measurement of Soft Rock Tunnel by Way of Photo Analysis

Photo analytic method usually used in aviation photography measurement, it was applied in displacement measuring of model experiment of soft rock tunnel. It confirmed that the result can meet the demand of experiment accuracy which use popular camera under omitting non-liner error,it has same application perspective to dynamic state experiment and non-contact measuremot. The priciple of deformation has positive signification tO select proper enhancement method.