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边坡稳定性极限平衡分析中水的作用对边坡安全系数计算结果影响很大。对于水的计算,静水压力下采用有效应力分析方法(水土分算)而动水压力条件下采用土条整体受力(水土合算)分析。当前各类规范中对动水压力计算没有一致规定,而相关书籍在计算中采用水土分算和水土合算对比时计算结果会有一定误差。根据渗流力学和土力学的基本原理,分析规范中公式计算的误差大小和产生原因,并推导出计算渗流边坡的水土合算公式,该公式在边坡静水压力状态稳定性计算和渗流状态稳定性计算中所得结果有很好的一致性。
The role of water in slope stability limit equilibrium analysis has a great influence on the slope safety factor calculation results. For the calculation of water, the effective stress analysis method (water and soil separation) under hydrostatic pressure and the overall stress (water and soil equivalent) analysis under hydrodynamic pressure are used under hydrostatic pressure. At present, there is no uniform stipulation on the calculation of hydrodynamic pressure in all kinds of norms, and there is a certain error in the calculation results when the relevant books are calculated by using soil and water resources and soil and water. According to the basic principles of seepage mechanics and soil mechanics, this paper analyzes the error size and the cause of calculation in the formula, and deduces the formula of water and soil calculation for seepage slope. The formula is used to calculate the stability of seepage flow and stability of seepage state The results obtained in the calculation are in good agreement.