加筋土边坡稳定性分析水平条分简化计算方法

Simplified Calculation Methods of the Horizontal Slice for the Stability Analysis of Reinforced Soil Slope

加筋土在填土边坡工程中得到了广泛应用,采用传统的垂直条分法计算边坡稳定系数,不能合理考虑水平筋材的作用效果,使计算结果偏于保守,而用水平条分法计算加筋土边坡的稳定性,具有较好的优越性。首先分析水平条分与竖直条分中条间力的关系,建立类似垂直条分瑞典法和简布法的水平条分条间力的假设条件,推导在2种假设条件下,能适用于水平加筋和立体加筋土边坡稳定性安全系数的计算公式。通过算例对比分析,证明本文方法的可行性,并分析立体加筋不同竖筋高度和竖筋间距对边坡稳定性安全系数的影响,为立体加筋技术在边坡工程中的推广和应用提供参考。

The reinforced soil slope has been widely used in filling slope engineering.The safety factor of slope stability obtained by traditional vertical slice method is conservative,in which the effect of horizontal reinforce-ment can＇t be considered reasonably.But the safety factor of slope stability obtained by horizontal slice method is superior.Firstly,in this paper the relationship of forces between slices in both horizontal and vertical slice methods is analyzed.Then the assumptions of horizontal slice method are set up which are similar to Sweden slice method and Janbu method.At last,the calculation formula of safety factor applying to horizontal and ver-tical reinforced slope is deduced under the condition of these two assumptions.The analysis of examples verified the feasibility of the method.And the influence of height and spacing of vertical reinforcement on the slope safe-ty factors are analyzed.These results can provide reference for the popularization and application of vertical re-inforcement in slope engineering.