Analysis of the characteristics and causes of ground fissures in Kenya rift region

Peng TAN; Yang LIU; Fuqiang JIANG; Xinlan WEN; Feiyong WANG; Zhijie JIA

doi:10.16031/j.cnki.issn.1003-8035.2021.06-07

Volume 32 Issue 6

Dec. 2021

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The Chinese Journal of Geological Hazard and Control > 2021 > 32(6): 53-62. > DOI: 10.16031/j.cnki.issn.1003-8035.2021.06-07

Peng TAN, Yang LIU, Fuqiang JIANG, Xinlan WEN, Feiyong WANG, Zhijie JIA. Analysis of the characteristics and causes of ground fissures in Kenya rift region[J]. The Chinese Journal of Geological Hazard and Control, 2021, 32(6): 53-62. DOI: 10.16031/j.cnki.issn.1003-8035.2021.06-07

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Analysis of the characteristics and causes of ground fissures in Kenya rift region

1.
China Road and Bridge Corporation, Beijing　100011, China
2.
College of Geological Engineering and Geomatics, Chang'an University, Xi'an, Shaanxi　710054, China
3.
CCCC Railway Consultants Group Co. Ltd., Beijing　100088, China

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Received Date: January 09, 2021
Revised Date: April 15, 2021
Available Online: December 19, 2021

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Abstract

The Kenya Rift valley is located in the middle section of the eastern branch of the Great Rift valley in East Africa. Modern tectonic movement and volcanic activity are intense, and it is a hotspot in current geological research.The rift zone has developed ground fissure disasters due to its unique geological structure background, rock and soil characteristics, and meteorological and hydrological conditions. In this paper, we have studied the geological environment background, plane characteristics and shallow section structure characteristics of ground fissures in rift valley area through data collection, detailed field geological surveytrenching, drilling and indoor geotechnical tests. Internal dynamic geological processes such as rift extension and volcanic activity are the controlling factors for the formation of ground fissures in this area; the loose and easily eroded soil on the shallow surface is the material basis for the formation of ground fissures; strong rainfall provides hydraulic power for the formation of ground fissure Conditions: The "soft-hard-soft" stratum structure provides a favorable accumulation place for water-erosive substances. Finally, we divide the formation and evolution process of ground fissures in the Kenya Rift Valley into three stages, the incubation stage, the expansion stage and the disaster stage.
- Kenya Rift valley,
- ground fissures,
- flat profile characteristics,
- undercutting,
- genetic mechanism

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