有效应力概念下瑞典条分法稳定安全系数公式讨论

针对有效应力概念下瑞典条分法计算土坡稳定安全系数公式目前存在2种形式所出现的不一致,并且它们散见于不同版本的教材或著作与规范(规程)中存在概念含混的现象,提出有必要进行讨论并期待尽早"定案"。研究表明现有的2种公式形式只有1种是合理的。依据基本概念分别从有效应力原理、瑞典法原思路、各土条的一致性及与重度替代法相匹配几个方面进行系统论证,澄清概念,阐述了作者的观点。最后讨论了公式的特征与运用情况。

On formula for safety factor in Swedish slice method based on effective stress

For slope stability,there currently are two different and contradictory formulae for safety factor in the Swedish slice method based on the effective stress.They can be found in many documents(including textbooks or stands and specificaitons etc.).In fact only one formula is reasonable.Because of ambiguity and suspicion for many years,they should be discussed and a correct conclusion should be drawn.Based on the fundamental concepts,one formula of them,which is correct,was proved from the aspects of the principle of effective stress,the primary thought of the Swedish slice method,the consistency of every slice and the substituting method for bulk density.Finally,the characteristics and application of the correct formula(Formula 3 in the paper) were discussed.