Abstract:In light of the present situation of obtaining discontinuity information with conventional artificial measurement of heavy labor and low efficiency,the method of rapid obtaining rock mass discontinuity information based on digital photogrammetric workstation—VirtuoZo was put forward firstly. The study opened up a new path for rapid obtaining discontinuity information to promote the development of rock mass mechanics. The study closely combines geometrical information with engineering geology;and rock slope was regarded as research object. The method of space front intersection was adopted to do the control survey with Topcon total station instrument(2¢¢). The common digital camera was used to take photographs of the slope. On the basis of this,VirtuoZo was used to establish the model between images and objects,obtaining three-dimensional images and the spatial coordinates of characteristic points of discontinuities. This was coupled with the study of models of trace line displaying and orientation calculating based on spatial coordinates of rock mass discontinuities. Therefore,the geometrical information of rock mass discontinuities can be obtained,including trace lines and orientations. Compared with orientations that are measured artificially with compass,the precision of obtaining orientation information based on VirtuoZo was analyzed. The method of rapidly obtaining rock mass discontinuity information based on VirtuoZo was verified to be feasible and had extensive application prospect through discontinuity information acquisition and its application to practice in the lithologic slope strengthening engineering of Baolilinyu village in Guangzhou.