Problematic and current knowledge of the tierra blanca joven tephras in the metropolitan area of San Salvador, El Salvador

Revista Geológica de América Central

Chávez, José A.²  Hernández, Walter¹  Kopecky, Lubomir³ 

[1] Dirección General del Observatorio Ambiental, El Salvador;Oficina de Planificación del Área Metropolitana de San Salvador (OPAMSS), El Salvador;Czech Technical University in Prague, Czech Republic

关键词: /span> Tierra Blanca;    geotechnical;    unsaturated;    suction;    collapsible;    erosion;    mass movement;   

DOI  :  

学科分类：地质学

来源: Universidad de Costa Rica * Editorial

【 摘 要 】

Currently the Metropolitan Area of San Salvador (AMSS) is experimenting serious problems of mass movements, erosion, collapse or settlements, phenomena that in El Salvador are popularly encompassed by the term “carcavas”. This problematic is presented mainly in the volcanic tephras Tierra Blanca Joven (TBJ), product of the last plinian eruption of Ilopango Caldera, whose products are an intercalation of pyroclastic fall, flows and surge. The tephras are unsaturated and the geotechnical information shows a decrease of shear strength and collapse when saturated. To characterize properly this material is important to know the relationship of moisture content with the volume changes and apparent cohesion, which are related to suction and cementation. The understanding of the behavior of the geological materials can help in running slope stability simulations and geotechnical design in general.

【 授权许可】

CC BY-NC