نوع مقاله : یادداشت پژوهشی
نویسندگان
دانشکده فنی و مهندسی، دانشگاه خوارزمی، تهران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Hydraulic fracturing can occur in the fine-grained core of earthen dams. This phenomenon often occurs during the first water intake of the dam when the water pressure suddenly increases. Hydraulic fracturing in Erath dam has investigated laboratory by many researchers (Jaworski, 1981; Jian, 2022; Patel, 2017). In this research, the aim is to investigate numerically the phenomenon of hydraulic fracture and the effect of the dimensions and shape of the clay core section of the Hajiler Chai Dam (an earthen dam with impermeable clay core) located in East Azarbayjan province on the reliability coefficient of hydraulic fracture. For this purpose, first, using Geo-Studio, the phenomenon of hydraulic fracturing has been investigated in two sections in the middle of the core (A-A) and the upstream side of the core (B-B) of the dam for two types of materials CL and CH. Analyzes have been done in the stages of the end of construction, initial dewatering and steady state seepage, and the stages of dam construction have also been considered in the modeling. Also, the possibility of hydraulic fracture in thicker cores and the bottom of the core was also investigated. Finally, the reliability coefficient of hydraulic failure occurrence has been quantitatively calculated for each of the soils in stages and sections and with different criteria, and the suitable soil has been suggested for use in the dam core.
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