[例5.3]如图5.15所示,在一不透水的非压缩岩层上,覆盖一厚10m的饱和黏土层,-|||-其上面作用有条形均布荷载,在土层中引起的附加应力呈梯形分布, (sigma )_(20)=240kPa ,-|||-(sigma )_(z1)=160kPa ,已知该土层的平均孔隙比 _(1)=0.8 ,压缩系数 =0.00025kP(a)^-1 ,渗透系数-|||-=6.4times (10)^-8cm/s 。试计算:加荷一年后地基的沉降;加荷多长时间,地基的固结度 _(1)=75% -|||-1111-|||-240kPa-|||-240kPa-|||-量-|||-1-|||-160kPa-|||-图5.15例5.3图