Alternative Title

NCKRI Symposium 2: Proceedings of the Thirteenth Multidisciplinary Conference on Sinkholes and the Engineering and Environmental Impacts of Karst



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University of South Florida

Publication Date

May 2013


pg(s) 293-297 A series of sinkholes collapsed at Maohe village, Liuzhou, Guangxi, China. The collapsing event formed 41 sinkholes, 11 donut-shape subsidence areas and 68 fractures in May of 2012. Many ground failures and fractures formed and an area of 40000 m2 was impacted by the collapsing event. The collapsing event was caused by large scale soil piping and soil void collapses. Preliminary investigations revealed that drastic fluctuations of karst water level caused this collapsing event. Heavy precipitation along with bedrock roof collapse of underground streams may trigger a "water hammer" effect in the karst conduits. The "water hammer" effect caused severe soil damage and subsequent collapses in Maohe Village. Soil disturbance may cause a change in hydraulic gradient, causing water level fluctuations that eventually resulted in sinkhole collapses. By monitoring pressure changes of karst water, turbidity of groundwater, locating soil voids and soil disturbances using ground penetrating radar (GPR), it is possible to predict future sinkhole collapses. Open Access - Permission by Publisher See Extended description for more information.


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