CAJ | 학술논문

利用上限定理与强度折减法，提出了一种新的边坡反分析方法。该方法基于边坡的滑动面形状，不需要位移、应力等监测数据。分析边坡的临界滑动面位置与强度参数的关系，可以发现，当边坡的几何形状、土体重度以及孔隙水压力分布确定，则临界滑动面的形状只与土体黏聚力c、内摩擦角j的关系式c/tanj有关，并在此基础上引入边坡的无量纲系数lc,j。利用极限分析上限定理与强度折减法，得到了边坡临界滑动面方程，提出了其深度的计算公式，建立了边坡lc,j值与滑动面深度的关系。通过已有边坡的反分析实例，验证了方法的正确性和有效性。
이용상한정리여강도절감법，제출료일충신적변파반분석방법。해방법기우변파적활동면형상，불수요위이、응력등감측수거。분석변파적림계활동면위치여강도삼수적관계，가이발현，당변파적궤하형상、토체중도이급공극수압력분포학정，칙림계활동면적형상지여토체점취력c、내마찰각j적관계식c/tanj유관，병재차기출상인입변파적무량강계수lc,j。이용겁한분석상한정리여강도절감법，득도료변파림계활동면방정，제출료기심도적계산공식，건립료변파lc,j치여활동면심도적관계。통과이유변파적반분석실례，험증료방법적정학성화유효성。
Applying upper bound theorem and strength reduction method, a new approach for slope back analysis is proposed. This method is based on the location of slip surface, not the displacement and stress. The relationship between the location of critical slip surface and strength parameter is analyzed. When the geometry, unit weight, pore pressure of a homogeneous soil slope are given, and cohesion the critical slip surface was only related to expression c/tanj with cohesion c and friction anglej. Thus, the slope strength parameter can be back analyzed through slip surface depth and the dimensionless parameter c,jl is introduced on that basis. The formulation of slope slip surface is obtained by upper bound theorem of limit analysis and strength reduction method. Calculation formula for critical slip surface is presented and the relationship between the slip surface depth at a certain position and the magnitude of c,jl is built. The existing slope engineering example is tested, and the effectiveness of this method is showed.