CAJ | 학술논문

在边坡失稳破坏过程中，黏聚力c和摩擦角?所起的作用是不相同的，边坡双安全系数虽然体现了c和?安全储备的不同，但其强度参数折减过程具有盲目性，并且在衡量边坡稳定性方面缺乏统一的标准。根据Mohr-Coulomb屈服准则，基于强度储备原理，提出综合安全系数；对土的软化过程进行推导，得到c和?折减系数之间的关系；利用FLAC3D 中的fish语言编写自定义非等比强度折减程序，分析了不同强度参数折减比下边坡的稳定性。研究表明：①提出的综合安全系数消除了双安全系数在评价边坡稳定性方面的不确定性；②在黏土边坡失稳破坏过程中，黏聚力c所起的作用大于摩擦角?；③改进的强度折减法克服了传统强度折减法无法考虑滑动面土体劣化过程等问题。
재변파실은파배과정중，점취력c화마찰각?소기적작용시불상동적，변파쌍안전계수수연체현료c화?안전저비적불동，단기강도삼수절감과정구유맹목성，병차재형량변파은정성방면결핍통일적표준。근거Mohr-Coulomb굴복준칙，기우강도저비원리，제출종합안전계수；대토적연화과정진행추도，득도c화?절감계수지간적관계；이용FLAC3D 중적fish어언편사자정의비등비강도절감정서，분석료불동강도삼수절감비하변파적은정성。연구표명：①제출적종합안전계수소제료쌍안전계수재평개변파은정성방면적불학정성；②재점토변파실은파배과정중，점취력c소기적작용대우마찰각?；③개진적강도절감법극복료전통강도절감법무법고필활동면토체열화과정등문제。
The shear strength parameters c, ? have different exerting extent during the slope failure. Although the two safety factors fairly represent the differences of the strength reserve of c and?,its strength reduction are uncertainty,and there lacks a unified standard regarding to the measuring of the slope stability. In this paper,according to the Mohr-Coulomb yield criterion and the strength reserve principle,comprehensive safety factor was put forward; The relationship between reduction factors of c and ? was obtained from the derivation of soil softening process; A user-defined program which expresses a non-proportional strength reduction method was compiled with the fish language in the FLAC3D to analyze slope stability based on different strength parameters. The main research results are as follows:①Comprehensive safety factor eliminate the uncertainty of two safety factors in slope stability evaluation.②The cohesion c plays a more important role than the internal friction angle?does in the clay slope destroy.③The improved strength reduction method takes a consideration on the soil deterioration process that the traditional strength reduction did not do.