3D Mapping Technology Of Underground Structures

Currently, underground building measurement and three-dimensional expression is anew field, three-dimensional mapping technology of domestic and foreign undergroundstructures is relatively small, compared with the ground, three-dimensional digitaltopographic mapping technology mapping technology of underground structures have thesame place, but due to the special environment of the underground building which, in themeasurements by the conditions, the underground structures of three-dimensional mappingtechnology to carry out specialized research. This paper we study the definition andclassification of underground structures, and then follow the split step "measure" control order,introduced the Total Station mapping technology,3D laser mapping technology built drawingsmapping technology, the last underground building three-dimensional expression, the mainwork of this paper is as follows:⑴Discusses the definition and classification of underground buildings, Background andSignificance of the underground building three-dimensional mapping technology, the status ofthe underground space mapping technology, mapping technologies routes of the undergroundbuildings and raised the content of this article.⑵According to the order of first control Scattered detailed description of the TotalStation surveying and mapping underground structures, and focus on the shaft forms theground and underground contact measurement method, as well as feature points of the top ofthe underground structures for the mine a well directed and well directed "thinking applied tothe control measurement of the underground buildings, and finally a brief introduction to theprism measurement technique.⑶Details the use of3D laser scanning equipment for field data collection and pointcloud data post-processing process. Introduce the composition of the principle of3D laserscanning, classification and three-dimensional laser scanning systems,3D laser scanningmethod of operation of the foreign industry scan point cloud data within the industry to deal with, such as point cloud data pre-processing, multi-alignment and registration, feature pointinformation extraction.⑷A brief introduction built drawings related information, such as built drawingsdefinitions, measurement methods and measurement content, and completion of the linkbetween the map and the topographic map, using built drawings for the method ofthree-dimensional data of feature points, and use the built drawings known control pointcoordinates to derive the coordinates of feature points experiment.⑸Describes the technical characteristics of the three-dimensional expression of theunderground structures, and using AUTO CAD and Sketchup, respectively, three-dimensionalexpression of the Xi’an South Gate underground passage and draw some useful experience.