Abstract
In karst areas of Quaternary sediments, fissures and solution channels through soluble rocks provide unseen conduits for the vertical movement of surface water into the underlying karst aquifers. This downward flow may also transport overburden material, which can result in the formation of soil caves and ground loss called cover-collapse sinkholes. Because of the concealed development of such soil caves and generally complicated geological conditions, the prediction of soil cave development and sinkhole activity is far from perfect. This study focused on the early warning of soil cave and sinkhole development by monitoring groundwater-level decline. Based on the improved Terzaghi loosening pressure theory and using excess pore water pressure, two types of critical groundwater-level decline are discussed. The first, denoted as ∆0, is the critical groundwater-level decline related to soil cave formation and evolution; the second, denoted as ∆HT, is the critical groundwater-level decline related to soil cave roof collapse. This method of groundwater monitoring for the early warning of soil cave and sinkhole development is currently being applied on Datansha Island in Guangzhou, China.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
