●●●●● 9.2.3平均裂缝间距 ●●●● ●●0 ●●● ●●●● (1.9+008-) 2 te A9.2.3 平均裂缝间距 (1.9 0.08 ) t e eq cr d l c  =  +  =  i i i i i eq n v d n d d 2 te s te A A  =