Abstract
In order to construct a 154 m high, 1,650 m long earth filled dam across the Yellow River at Xiaolangdi, China, site investigations including in situ and laboratory tests, Landsat imaging, geological mapping, geophysical survey and drilling were undertaken. Two special investigation techniques were employed. To ensure full recovery of the intercalated clays and siltstones in the Permian and Triassic deposits, a sleeve drilling technique was introduced while to establish the long-term stress conditions in the tunnels, radial resistance testing was undertaken. The paper focuses on the geotechnical characteristics of the Quaternary sands and gravels, which in the channel of the valley are up to 70 m thick, and discusses the influence of the Triassic and Permian bedrock.
Résumé
Dans le but de construire un barrage en terre de 154 m de hauteur et 1650 m de long sur le Fleuve Jaune à Xiaolangdi (Chine), des reconnaissances de terrain ont été réalisées, comprenant des analyses d’images Landsat, une cartographie géologique, des forages, des essais in situ et au laboratoire, des prospections géophysiques. Deux méthodes particulières ont été mises en œuvre pour les forages. Afin de récupérer correctement les niveaux argileux et silteux intercalés dans les formations du Permien et du Trias, une méthode de forage avec chemisage a été mise en œuvre. De plus, des essais de résistance radiale ont été réalisés pour déterminer les états de contraintes à long terme dans les galeries. L’article précise les caractéristiques géotechniques des sables et graviers quaternaires, de plus de 70 m d’épaisseur au droit du chenal principal, et analyse l’influence du substratum triasique et permien.
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Fengshou, L., Qingchun, Y., Shaomin, Z. et al. Geological and geotechnical characteristics of Xiaolangdi dam, Yellow River, China. Bull Eng Geol Environ 65, 289–295 (2006). https://doi.org/10.1007/s10064-005-0032-z
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DOI: https://doi.org/10.1007/s10064-005-0032-z