Water Resources and Power

Aiming at the problem that the safety factor of earth slope obtained by grain flow gravity increase method is unreasonably large,the grain flow gravity increase method is improved.By reducing the particle friction coefficient,the adverse impact of soil shear strength is offset which caused by gravity increasing.Therefore,it makes the slope safety factor more reasonable.The results show that the slope safety factor obtained by improved gravity increase method is close to other methods;the sliding surface of cohesive soil slope can be determined accurately by taking the change of contact and force between particles into consideration.It is indicated that modified gravity increase method improves the lack of gravity increase method effectively and has certain reference value in the calculation of safety factor for cohesive soil slope.