Discussion on reduction factors of strengthen reduction method

Because c and φ have different degree and order of play and different decay speed and degree when slopes slide,both shall have different safety reserve.In accordance with this,it was recommended that c and φ should have different reduction factors,not same about Strengthen Reduction Method(SRM).Meantime to take a slope as the example,by FLAC 3D software,and considering reduction factors were different and same,the slope stability was analyzed with SRM,and the results were studied by comparison.The conclusions are that the slope has corresponding safety factors and possible slide plane when c and φ adopt one of different reduction factors,all these possible slide planes compose a possible slide region,and c and φ have same reduction factor is only a special case among many reduction methods.Therefore the conclusions prove the viewpoint mentioned above.