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Volume 37 Issue 2
Apr.  2018
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Article Navigation >  CARSOLOGICA SINICA  > 2018  >  37(2): 294-299
JIANG Fuwei, LI Liang, CHEN Hang. Critical conditions for karst collapses in the Yongwen Middle School, Guiyang, China[J]. CARSOLOGICA SINICA, 2018, 37(2): 294-299. doi: 10.11932/karst20180217
Citation: JIANG Fuwei, LI Liang, CHEN Hang. Critical conditions for karst collapses in the Yongwen Middle School, Guiyang, China[J]. CARSOLOGICA SINICA, 2018, 37(2): 294-299. doi: 10.11932/karst20180217
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Critical conditions for karst collapses in the Yongwen Middle School, Guiyang, China

doi: 10.11932/karst20180217

  • Guizhou Institute of Technology

  • Publish Date: 2018-04-25
    Abstract
  • There are 7 karst collapses happened and 1 potential collapse site in the Yongwen Middle School of Guiyang city, which pose a serious threat on the safety of teachers and students and property there. This site is characterized by highly soluble bedrock, thin covering clay layer and strong groundwater erosion;these have caused the site to be a high-risk karst collapse in this area. Through laboratory simulation test,it is realized that the karst collapse hazard follpwed a fissure-seepage-disintegration model. The results also show that the soil water content is critical in the disintegration and the formation of karst collapses. Furthermore, 8 sets of undisturbed samples with different water content are used to conduct disintegration tests. They demonstrate that the water content of 26.8% is the critical value to trigger karst collapse, while 0~26.8% is the condition for generation of such a risk at the site.

     

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