地下墙护壁泥浆临界相对密度的显式解──坍体底面未及地下水面

The Clear Solution of the Critical Specific Gravity of Slurry Propping the Trench of Diaphragm Wall -The Bottom of Slump Mass Does not Cross the Groundwater Level

对考虑了土拱效应的地下墙泥浆槽壁稳定分析的坍体极限平衡方程式给出了改正的适用条件和物理意义明确的转换式，导出了最危险状态的坍体底面临界倾角和相应的极限平衡状态的泥浆临界相对密度的显式解公式。推论分析了各种因素对结果的影响。

By means of stability analysis for slurry trench of diaphragm wall consideringsoil arch action,the corrective limit condition and the transformed limit equilibrium equationwhich physical conception is clear for slump mass is presented,and the clear formula for thecritical dip angle of slump mass’ bottom in the most dangerous state and for thecorresponding slurry critical specific gravity in the limit equilibrium state are deducted. Someoffection and fluctuation of results which are caused by some factors are also obtained byinferences and analysis to the formula.