本文在分析人工换填地基受力特点的基础上,对其应力分布的计算公式提出了新的建 议。主要有以下三点: ( 1)根据换填层下伏地层的物理特性将其分为锥形和柱形分布。( 2)将以往应 力分布的棱锥或棱柱形修正为圆锥或圆柱形。( 3)在弹性半无限体理论空间解的基础上导出了应 力扩散角的建议值。并在以上三点建议的基础上制定出了各种情况下应力分布的计算公式。

Based on the a nalysi s on the loading specialities of a g round during manual cut and replacement, the paper propo ses the new sugg estions o n the calculation fo rmulas of the distribution of the st resses. There are mainly the follow ing three points: ( 1) The di stribution of st resses are divided as the co nica l dist ributio n and the co lumna r dist ributio n acco rding to the physical speciali ties of the underg round lay er beneath the cut and replacement lay er. ( 2) The fo rmerly used pyramidical and prismatic st ress di st ribution a re revised as ci rcular-co nical and ci rculra-columnar respectiv ely. ( 3) Ba sed o n the spacial so lution of the elastic semi-infinite element theo ry, the sug gested v alue of the st ress spread a ngle has been derived. Based on the abov e three sugg estio ns, the calcula tion fo rmulas of stress dist ributio n under di fferent conditions a re wo rked out.