چکیده مقاله
Regarding to important role of cut off wall behaviour in seepage reduction and dam stability, in this paper we have studied interaction between dam body, cut off wall and foundation, considering the effects of interface elements We tried to examine the behaviour of walls in homogeneous and heterogeneous dam foundations We studied on the behaviour of karkheh dam cut off wall in heterogeneous foundation and compared the results with the same model but with a homogeneous foundation Obtained results show that the cut off wall in homogeneous foundation is subjected to a nearly hydrostatic water pressure In this case relation between elasticity modulus of foundation and cut off wall is very important to assign the appropriate behaviour of the cut off wall If these two modulus to be close enough to each other, induced stresses and strains in the wall will be moderate and acceptable In the case of heterogeneous foundation, the results are different In this condition cutoff wall is subjected to stress and strain localization near to mudstone layers and maximum pore pressure near to conglomerate layer Although, hydraulic fracturing will not happen in cut off wall because of high effective stresses
کلیدواژهها
نویسندگان
Mehdi Karimnia
Phd Stu
Amir Shahkarami
Professor
شیوه ارجاع
Karimnia, Mehdi and Shahkarami, Amir,1385,Study on the behaviour of cut-off-walls in homogeneous and heterogeneous dam foundations,7th International Congress on Civil Engineering,Tehran
ارائهشده در
مجموعه مقالات هفتمین کنگره بین المللی مهندسی عمران17 اردیبهشت 1385 · تهران