Near-surface site investigation and imaging of karst cave using comprehensive geophysical and laser scanning: a case study in Shandong, China

Abstract

The karst development of Jiao Dong Peninsula in Shandong Province has formed a unique karst landform, and has become one of the typical karst areas in the north of China. Karst collapse occurred during the construction of high-speed railways and caused many environmental problems. To reveal the development situation of karst area in Shandong, the conventional surface geophysical techniques were used for karst exploration and location of key area. And the results of drilling verification were in good agreement with the results of geophysical exploration. At the same time, the new technology in the field of surveying and mapping 3D laser scanning technology, is cited in the engineering geophysical exploration, and the key issue is the shape and size of the karst. It makes up for the shortcomings of traditional geophysical exploration technology that can only be qualitative and cannot be quantitatively analyzed. It realizes the transformation of karst exploration from regional detection to single cave exploration, and better implements the concept of information construction. It has contributed to the smooth progress of the project and environmental protection.