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چکیده
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The ancient Fariman dam is located in Khorasan province in north of Iran. The dam is about 400 years old and has since long been used for flood control and serving the needs of irrigation and industries. The materials of the dam are consisted of, bricks, boulders, cobbles with lime, Sarooj (lime, ash and sand) and wood, was originally constructed to a height of 4m, but has subsequently been heightened twice, 300 and 72 years ago. Old dam height above foundation is 25 m. The dam has been upgraded due to overtopping occurring almost every year during the flood season and leakage through the dam body. The height of the dam has been increased by about 5 m together with leakage prevention measures for its upstream face as well as strengthening the old structure in 2001. The new crest level of the dam has been decided on the basis of 1000 years flood. Upgrading details for strengthening, heightening and leakage control measures of old Fariman dam body have been discussed. Finite Element Analysis (FEA) of the proposed section for different possible load combination as well as past and present performance of the dam is also discussed in the paper. The upgraded section after strengthening, heightening and leakage control measures of dam body has been found to be structurally efficient for leakage prevention and resisting the different possible load combinations.
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