Karst collapse characteristics, disaster factors and risk analysis in Xiamao Village, Baiyun District, Guangzhou City

ZHOU Xinjing; GUO Yu; ZHENG Xiaozhan; LI Jingjing; ZHANG Junling; ZHU Zhaoyu

doi:10.16031/j.cnki.issn.1003-8035.2021.06-08

2021 Vol. 32, No. 6

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Article navigation > The Chinese Journal of Geological Hazard and Control > 2021 > 32(6): 63-71

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ZHOU Xinjing, GUO Yu, ZHENG Xiaozhan, LI Jingjing, ZHANG Junling, ZHU Zhaoyu. Karst collapse characteristics, disaster factors and risk analysis in Xiamao Village, Baiyun District, Guangzhou City[J]. The Chinese Journal of Geological Hazard and Control, 2021, 32(6): 63-71. doi: 10.16031/j.cnki.issn.1003-8035.2021.06-08

Citation:

ZHOU Xinjing, GUO Yu, ZHENG Xiaozhan, LI Jingjing, ZHANG Junling, ZHU Zhaoyu. Karst collapse characteristics, disaster factors and risk analysis in Xiamao Village, Baiyun District, Guangzhou City[J]. The Chinese Journal of Geological Hazard and Control, 2021, 32(6): 63-71. doi: 10.16031/j.cnki.issn.1003-8035.2021.06-08

Karst collapse characteristics, disaster factors and risk analysis in Xiamao Village, Baiyun District, Guangzhou City

1.
Guangzhou Institute of Geological Survey, Guangzhou, Guangdong　510440, China
2.
Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, Guangdong　510640, China

More Information

Corresponding author: GUO Yu, 174563241@qq.com

Received Date: 28 March 2021

Revised Date: 10 May 2021

Publish Date: 25 December 2021

Abstract

Abstract

Xiamao Village has been suffered from serious karst collapse geological disasters. The geological environment conditions in the collapse area are extremely complex. Karst soil caves of hidden limestone have strong development, and karst caves and soil caves are large in scale. Moreover, there are many karst caves with good connectivity among karst caves. The bedrock surface of karst collapse area fluctuates greatly, elevation changes sharply, the Quaternary overburden is thick, and the bottom silty clay layer soil is very large in saze. The cave development, the large-scale cave in the soil is the material foundation of karst ground collapse. In the bedrock fault structural zone and its influence zone, the rock is broken, and the water guide fault is formed. There is groundwater runoff channel. The groundwater circulation along the fault zone is active and the dissolution is strong, forming a strong karst development zone, which provides a good dynamic condition for the occurrence of karst collapse. The construction of the building foundation in the area disturbed the balance between groundwater and soil cave, which became the inducing factor of ground collapse. The risk assessment of karst ground subsidence is carried out by using seven geological environmental conditions and five economic and demographic indexes respectively. The results show that the potential geological disaster risk is large in Xiamao Village. Only by strictly controlling the dynamic conditions of groundwater can avoid karst ground collapse.
- karst development /
- influencing factors /
- risk assessment /
- Xiamao Village /
- Guangzhou City

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References

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