Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Application of Microgravity Survey to Detect Underground Cavities in a Desert Karst Terrain
Several sinkholes were detected in a residential area located close to the northeast coastal side of the Arabian Peninsula. The sinkholes occurred suddenly with different sizes and to a maximum of 31 m in depth. Comprehensive investigation studies were conducted for understanding the causes of the sinkhole occurrence in addition to recommend treatment measures. The results revealed that the geological profile is made of sandy overburden soil uncomfortably overlaying Karst limestone bedrock. The cause of the sinkholes was attributed to the dissolution of the limestone bedrock and the subsequent raveling of the overburden soil cover. Microgravity survey method was used in the geophysical investigation to detect subsurface cavities. The validity of the microgravity survey was confirmed after applying a drilling program. After 15 years, another microgravity survey was conducted in selected locations of the same residential area for the purpose of verifying the current underground status and assessing its development. In this paper, nature of the desert Karst terrain under study is described. The results of the two microgravity surveys are presented. The results confirmed the capability of the microgravity method to detect density anomalies and ground disturbances. The maps showed evolution of the anomalies in some locations within the studied area.
Application of Microgravity Survey to Detect Underground Cavities in a Desert Karst Terrain
Several sinkholes were detected in a residential area located close to the northeast coastal side of the Arabian Peninsula. The sinkholes occurred suddenly with different sizes and to a maximum of 31 m in depth. Comprehensive investigation studies were conducted for understanding the causes of the sinkhole occurrence in addition to recommend treatment measures. The results revealed that the geological profile is made of sandy overburden soil uncomfortably overlaying Karst limestone bedrock. The cause of the sinkholes was attributed to the dissolution of the limestone bedrock and the subsequent raveling of the overburden soil cover. Microgravity survey method was used in the geophysical investigation to detect subsurface cavities. The validity of the microgravity survey was confirmed after applying a drilling program. After 15 years, another microgravity survey was conducted in selected locations of the same residential area for the purpose of verifying the current underground status and assessing its development. In this paper, nature of the desert Karst terrain under study is described. The results of the two microgravity surveys are presented. The results confirmed the capability of the microgravity method to detect density anomalies and ground disturbances. The maps showed evolution of the anomalies in some locations within the studied area.
Application of Microgravity Survey to Detect Underground Cavities in a Desert Karst Terrain
Kamal, Hasan (Autor:in) / Taha, Mahmoud (Autor:in) / Al-Sanad, Shaikha (Autor:in)
GeoShanghai International Conference 2010 ; 2010 ; Shanghai, China
14.05.2010
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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