对人工换填地基应力分布计算公式的建议

SUGGESTION ON CALCULATION FORMULAS OF THE DISTRIBUTION OF STRESSES IN A GROUND DURING MANUAL CUT AND REPLACEMENT

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 analysis on the loading specialities of a ground during manual cut and replacement, the paper proposes the new suggestions on the calculation formulas of the distribution of the stresses. There are mainly the following three points: (1)The distribution of stresses are divided as the conical distribution and the columnar distribution according to the physical specialities of the underground layer beneath the cut and replacement layer. (2)The formerly used pyramidical and prismatic stress distribution are revised as circularconical and circulracolumnar respectively. (3)Based on the spacial solution of the elastic semiinfinite element theory, the suggested value of the stress spread angle has been derived. Based on the above three suggestions, the calculation formulas of stress distribution under different conditions are worked out.