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Geomechanics and Engineering Volume 9, Number 4, October 2015 , pages 483-498 DOI: https://doi.org/10.12989/gae.2015.9.4.483 |
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Application of hydraulic cylinder testing to determine the geotechnical properties of earth-filled dams |
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Roman F. Rodriguez, Celestino G. Nicieza, Fernando L. Gayarre and Francisco L. Ramos Lopez
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| Abstract | ||
| This article describes a new in-situ load test called the Hydraulic Cylinder Test (HCT) and its application to determine the geotechnical properties of soil-rock mixtures. The main advantages of the test are its easy implementation, speed of execution and low-cost. This article provides a detailed description of the equipment and the test procedure, and examines a case study of its application to determine the geotechnical properties of an earth-filled dam for a tailings pond. The containment dams of the ponds are made from blocks of gypsum and marl, obtained from the excavation of the ponds, mixed in a matrix of sands and clays. The size of the rocks varies between 1 and 30 cm. The HCT is particularly useful for determining the geotechnical properties of this type of soil-rock mixture. Nine HCTs were carried out to determine its strength (c, φ) and deformation (B, G) properties. The results obtained were validated using the Bim strength criterion, recently proposed, and some pressure meter tests carried out beforehand. The properties obtained are used to analyze the stability of the dam using computer simulations and a modification to its design is proposed. | ||
| Key Words | ||
| hydraulic cylinder test (HCT); earth-filled dams; soil-rock mixture; bim strength criterion; back analysis | ||
| Address | ||
| (1) Roman F. Rodriguez: Research Group of Ground Engineering, Mining Engineering School, University of Oviedo, Oviedo, Asturias, Spain; (2) Celestino G. Nicieza: Department of Exploitation and Prospecting Mines, Mining Engineering School, University of Oviedo, Oviedo, Asturias, Spain; (3) Fernando L. Gayarre: Department of Construction and Manufacture Engineering, Engineering School of Gijon, Viesques Campus, Gijon, Asturias, Spain; (4) Francisco L. Ramos Lopez: Department of Physics, Engineering School of Gijon, Viesques Campus, Gijon, Asturias, Spain. | ||