Critical conditions for karst collapses in the Yongwen Middle School, Guiyang, China

JIANG Fuwei; LI Liang; CHEN Hang

doi:10.11932/karst20180217

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

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

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.
- karst collapse,
- disintegration test,
- critical water content,
- simulation test of collapse

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References

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