Volume 8, Issue 4 (3-2015)
2015, 8(4): 2413-2434 |
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Ajalloeyan R, safary A. Geotechnical Properties Assessment of Subsurface Dams (Case Study). Journal of Engineering Geology 2015; 8 (4) :2413-2434
URL: http://jeg.khu.ac.ir/article-1-425-en.html
URL: http://jeg.khu.ac.ir/article-1-425-en.html
1- , ajalloeian@hotmail.com
Abstract: (6534 Views)
Subsurface dams is accordant with nature structure which is useful for water resources management, especially for preventing unused underground water. Regarding to reservoir alluvium, geological and geotechnical characteristics of this type of dam is important. Therefore, in present study, characteristics of the underground reservoir alluvium in Mastbandy area (South of Ardestan-North East of Isfahan) has been investigated. In this regard physical and mechanical properties of reservoir alluvium has been determined, using in situ and laboratory tests. Test results show that the type of alluvium is mostly non uniform dense granular soils without plasticity. Also its permeability is medium to high. Due to the porosity obtained from tests and the depth of the reservoir sediments (5 to 12 meters), in the case of subsurface dam construction, its volume would be about 200000 cubic meters. In general, due to full and empty of reservoir, loading and unloading cause the settlement. Since almost reservoir sediment are gravel and sand, the settlement is mainly immediate settlement. Due to obtained mechanical parameters, the amout of immediate settlement is equal to 16 milimeter
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