CAJ | 학술논문

采用极限平衡法对阿海水电站坝前堆积体边坡的稳定性问题进行了系统的研究。针对应用严格Janbu法迭代求解安全系数时存在收敛性不佳的问题，采用B－样条插值函数对条间力矩进行了拟合，从而保证了条间力矩一阶导数连续可导，改善了严格Janbu法安全系数计算的收敛性。坝前堆积体稳定性计算结果表明，在自然工况下，边坡是稳定的；在水电站正常蓄水工况下，其抗滑稳定安全系数在0．865～1．167之间，说明堆积体边坡存在局部失稳风险。对坝前堆积体进行削坡减载处置后，其稳定安全系数可以满足运行期边坡稳定安全控制标准。此外，通过参数敏感性分析指出，安全系数对堆积体冲积层饱和状态的内摩擦角较为敏感。
채용겁한평형법대아해수전참패전퇴적체변파적은정성문제진행료계통적연구。침대응용엄격Janbu법질대구해안전계수시존재수렴성불가적문제，채용B－양조삽치함수대조간력구진행료의합，종이보증료조간력구일계도수련속가도，개선료엄격Janbu법안전계수계산적수렴성。패전퇴적체은정성계산결과표명，재자연공황하，변파시은정적；재수전참정상축수공황하，기항활은정안전계수재0．865～1．167지간，설명퇴적체변파존재국부실은풍험。대패전퇴적체진행삭파감재처치후，기은정안전계수가이만족운행기변파은정안전공제표준。차외，통과삼수민감성분석지출，안전계수대퇴적체충적층포화상태적내마찰각교위민감。
For the slope stability problem of the deposit body in front of A'Hai Hydropower Station ,the limit equilibrium methods are used to obtain the factors of safety of slope stability against sliding ,and its stability is also analyzed .Rigorous Janbu method is poor in its convergence in the process of iteratively calculating factors of safety .In this paper ,the B-spline interpolation function is used to fit the inter-slice moment ,which makes sure that the inter-slice moment function is continuous in the first-order derivative .Thus the non-convergence problems of safety factor calculated by the rigorous Janbu method are greatly improved .The obtained results show that the deposit body is stable under natural conditions .Under normal hydropower reservoir conditions ,the factor of safety for slope stability of the deposit body against sliding is from 0 .865 to 1 .167 .Therefore ,the advice of slope cutting is proposed .After the ex‐cavation disposal ,stability safety factors of the deposit body meet the control standards in operation period of A'Hai Hydropower Station .In addition ,the parameter sensitivity analysis shows that the safety factor is more sensitive to the internal friction angle of saturated alluvium .