莫尔-库仑破坏准则 2a 3 ccot p+ O1十O ctAb =atan45°+|+2ctan|45°+ tan 45 2c tan 45 2 n245°+ 无粘性土:c=0 tn245 q莫尔-库仑破坏准则 3 1 c f 2 f A cctg1/2(1 +3 ) ( ) ( ) 1 3 1 3 2 1 cot 2 1 sin + + − = c + + = + 2 2 tan 45 2 tan 45 2 1 3 o o c − − = − 2 2 tan 45 2 tan 45 2 3 1 o o c 无粘性土:c=0 = + 2 tan 45 2 1 3 o = − 2 tan 45 2 3 1 o