CAJ | 학술논문

岩石边坡因其结构面数量众多、块体系统及其滑动方式复杂,给危险块体组合的搜索及其安全系数计算带来很大困难.基于块体单元法,对岩石边坡中的危险块体组合搜索及其安全系数的计算方法进行了研究.首先,在块体元强度折减计算的成果下,根据屈服面贯通理论提出搜索危险块体组合的新方法;然后,对安全系数计算方法进行研究,建议在位移突变判据下采用双线性交叉法计算安全系数;最后,进行了单面、双面和多面滑动以及复杂块体系统的算例分析,并与刚体极限平衡法计算结果进行了对比.结果表明,由于块体单元法考虑了力与力矩的平衡及结构面上应力的非均匀分布,其计算结果更准确.该方法有望广泛应用于复杂岩石边坡稳定分析.
암석변파인기결구면수량음다、괴체계통급기활동방식복잡,급위험괴체조합적수색급기안전계수계산대래흔대곤난.기우괴체단원법,대암석변파중적위험괴체조합수색급기안전계수적계산방법진행료연구.수선,재괴체원강도절감계산적성과하,근거굴복면관통이론제출수색위험괴체조합적신방법;연후,대안전계수계산방법진행연구,건의재위이돌변판거하채용쌍선성교차법계산안전계수;최후,진행료단면、쌍면화다면활동이급복잡괴체계통적산례분석,병여강체겁한평형법계산결과진행료대비.결과표명,유우괴체단원법고필료력여력구적평형급결구면상응력적비균균분포,기계산결과경준학.해방법유망엄범응용우복잡암석변파은정분석.
It is difficult to search the dangerous block combination and acquire the safety factor precisely because of the numerous planes of weakness, the complicated block system and the diverse slip modes in rock slopes. Based on block element method, the search of dangerous block combination and the calculation of stability safety factor are conducted. At first, a new method for searching dangerous block combination is proposed, according to the results of block element method through strength reduction calculation. Then, the method for computing safety factors is studied; and the double line intersection method is suggested to calculate the safety factor when the abrupt theory of displacement is adopted. At last, several typical examples are calculated with the proposed methods;and the results are compared with those obtained by using the rigid body limit equilibrium method. The results show that it is more accurate by adopting the block element method, because the force and bending moment equilibrium and the nonuniform distribution of stress on the planes of weakness are considered. The proposed method is expected to be widely used to solve stability problems in complicated rock slopes.