- 期刊
GEOPHYSICAL INVESTIGATION OF SHALLOW KARSTIC SUBSOIL; CASE STUDY OF JORF LASFAR REGION, WESTERN MORROCCO
摘要
The present study adopts an integrated approach, combining geophysical and geotechnical techniques for subsurface exploration of a karst limestone site affected for future development of an industrial project. The results from electrical resistivity tomography (ERT) have revealed numerous anomalies suggesting structural discontinuities in the ground at the project site. This discovery has prompted a strategic reassessment, leading to the incorporation of direct methods, particularly core drilling, and deferred loging to validate and further enhance the insights obtained from ERT. Through correlation of the acquired data, the results unveil relatively uniform lithological formations, punctuated by localized anomalies associated with cavities/paleokarsts filled by collapsed materials within deep limestone layers. Additionally, drilling log results emphasize the existence of narrow dissolution zones within the depth range of 60 to 70 m. These structures have the potential to develop into cavities over time. The integration of geophysical and geological data acts as a guide for subsequent geotechnical analyses, enabling informed decision-making for the project's design and foundation to ensure long-term stability. Ultimately, this information has unveiled the complexities of the site, providing an enhanced understanding of underground geological conditions. This knowledge serves as a robust assurance tool for developers, underscoring the essential role of geo engineering in delineating terrain conditions and mitigating potential hazards.