CN110689969B - Arc-shaped concave slope stability evaluation method based on simple plane sliding method - Google Patents
Arc-shaped concave slope stability evaluation method based on simple plane sliding method Download PDFInfo
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Abstract
本发明公开了基于简单平面滑动法的圆弧型凹坡稳定性评价方法,其实施过程如下:获取圆弧型滑体的重力W和滑面面积A 1;考虑圆弧型凹坡两侧过弧心轴且可提供法向刚性约束和切向摩擦的约束边界,获取圆弧型滑体与约束边界的接触面面积A 2、滑面倾角θ;通过下列公式计算边坡安全系数F s ;考虑圆弧型凹坡的拱效应及两侧约束边界的摩擦,对简单平面滑动法引入新的假定进行改进,经过改进的简单平面滑动法可以用于评价圆弧型凹坡的稳定性,且计算过程简单,为圆弧型凹坡的稳定性评价提供了一种计算结果更为合理的方法。
The invention discloses a method for evaluating the stability of a circular arc concave slope based on a simple plane sliding method. The arc axis can provide the normal rigid constraint and the constraint boundary of tangential friction, obtain the contact surface area A 2 of the arc-shaped sliding body and the constraint boundary, and the inclination angle θ of the sliding surface; calculate the slope safety factor F s by the following formula; Considering the arching effect of the arc-shaped concave slope and the friction of the constraint boundary on both sides, the simple plane sliding method is improved by introducing new assumptions. The improved simple plane sliding method can be used to evaluate the stability of the arc-shaped concave slope, and The calculation process is simple, and a more reasonable calculation method is provided for the stability evaluation of circular arc concave slopes.
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