M. Noori Sartangy; A. Uromeiea; K. Zarea Mozafary
Abstract
Engineering geological characteristics they Dam Khersan 3 Gachsaran in order to evaluate the solubility of gypsum and leakage problems and select a suitable method for sealing Gachsaran formation that includes part of the reservoir was investigated. Khersan 3 dam, the concrete arch dam with a height ...
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Engineering geological characteristics they Dam Khersan 3 Gachsaran in order to evaluate the solubility of gypsum and leakage problems and select a suitable method for sealing Gachsaran formation that includes part of the reservoir was investigated. Khersan 3 dam, the concrete arch dam with a height of 195 meters on the 40 km south Lordegan city on Khersan river is under construction. Geological formations site includes Asmari limestone , marl, gypsum and gypsum formations Gachsaran marl and shale Pabdeh and Gurpi formations and River alluvium is. The seepag, dissolution, XRF, XRD in some samples was determined and the leakage of water from the reservoir was evaluated using numerical analysis. Results and due to the presence of large marl, Lvzhan make up less than 3 and High RQD Gachsaran formations no Kataf wall construction or grout curtains, are suggested.
M. Kianpour; M. Sayari; A. Oromiea
Abstract
The uniaxial compressive strength and modulus of deformability of intact rocks are highly important parameters for rock engineering and engineering geology projects. Because of the difficulty of measuring these parameters and the need for laboratory equipments for their prediction, indirect methods ...
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The uniaxial compressive strength and modulus of deformability of intact rocks are highly important parameters for rock engineering and engineering geology projects. Because of the difficulty of measuring these parameters and the need for laboratory equipments for their prediction, indirect methods are often used. In this study, some predictive models using regression analysis and fuzzy inference system have been developed for the Shales cropping out in the Shemshak formation in Siahbishe area. For this purpose, a series of easy measurable parameters such as density, porosity and point load index were applied. Both multiple regression analyses and the fuzzy inference system exhibited good performance in prediction of the uniaxial compressive strength and modulus of deformability. The variation of regression coefficient (R2), performance indices (VAF) and root mean square error (RMSE) were calculated as for the uniaxial compressive strength and the modulus of deformability obtained from the multiple regression model and the fuzzy inference system revealed that the prediction performances and accuracy of the fuzzy model are higher than those of multiple regression equations in prediction of uniaxial compressive strength and modulus of deformability.
H. Bahrami; A. Uromiahy; M. Ahmadi; S. Soleymani
Abstract
In a perfect design of underground spaces, amount of total displacement from the point of stability analysis is fundamental. In empirical and numerical stability analysis periphery of excavated area is consider as a continued mass. When an underground space is excavated by blasting process, so periphery ...
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In a perfect design of underground spaces, amount of total displacement from the point of stability analysis is fundamental. In empirical and numerical stability analysis periphery of excavated area is consider as a continued mass. When an underground space is excavated by blasting process, so periphery of tunnel is damaged by that process. As a result, those materials are not continued. In this research this area named "Crashed areola". 3 dimensional distinct element methods has more adapted with this area, while compared to other numerical methods. 3DEC 4.0 which is based on this method was chosen as a numerical codes. 10th kilometers of Gavooshan tunnel which is water conveyance tunnel is considered as a case study. The part of this tunnel which studied in this research is surrounded by ophiolithic gabbro rock mass. For modeling of this tunnel two conditions were considered, first with continue media of rock mass and second discontinue media so called crash areola. One of the advantages of this part of tunnel is installation of instrumentation with very scientific methods and absence of lining in the other hand. The outputs of numerical solution were shown that modeling by considering crash areola is near to data collection by instrumentations.
