【摘要】 给出了基坑边坡在无支撑自由状态下首层开挖高度的统一计算公式 ,提出了综合影响修正系数 .根据待开挖层和已开挖土体本身的力学强度以及已开挖土体的支护强度 ,采用平滑破裂面模式极限平衡分析方法 ,给出了下一步开挖高度的计算公式 .通过实例说明了其计算过程更多还原

【Abstract】 A calculation formula of the first excavation height for foundation pit is given under no supporting,and the synthetic influence coefficient is suggested.Accord ing to the mechanics strength of excavating soil strata and the supported streng th of excavated soil strata , a calculation formula of the next excavation heigh t is given by the limit analysis of plane sliding model.The calculation process is introduced by a project example.更多还原