The evaluation of the seismic stability of an expanded municipal solid waste(MSW) landfill is very important in seismic prone zones.In this paper,the pseudo-dynamic method was used to calculate the average safety fact...The evaluation of the seismic stability of an expanded municipal solid waste(MSW) landfill is very important in seismic prone zones.In this paper,the pseudo-dynamic method was used to calculate the average safety factor for the expanded landfill with a trapezoidal berm based on under-berm failure conditions.Furthermore,the effects of the variation of parameters such as the amplification factor,seismic coefficient,height of berm,angle of back slope of berm,and depth of waste mass at the back slope on the seismic stability of the landfill were studied.The results indicated that the influences of the vertical seismic coefficient,height of berm,and angle of the back slope of the berm on the seismic stability of the landfill are weakened as the amplification factor increases,but the influence of the horizontal seismic coefficient on the seismic stability of the landfill is strengthened.On the other hand,a certain ratio of the height of the waste mass above the back slope to the depth of waste mass at the back slope,or the reasonable consideration of the magnitude of the amplification factor will be conducive to the seismic design of the landfill.In addition,the results obtained by the pseudo-static and pseudo-dynamic methods were compared.展开更多
In order to evaluate the seismic stability of reinforced soil walls against bearing capacity failure,the seismic safety factor of reinforced soil walls was determined by using pseudo-dynamic method,and calculated by c...In order to evaluate the seismic stability of reinforced soil walls against bearing capacity failure,the seismic safety factor of reinforced soil walls was determined by using pseudo-dynamic method,and calculated by considering different parameters,such as horizontal and vertical seismic acceleration coefficients,ratio of reinforcement length to wall height,back fill friction angle,foundation soil friction angle,soil reinforcement interface friction angle and surcharge.The parametric study shows that the seismic safety factor increases by 24-fold when the foundation soil friction angle varies from 25°to 45°,and increases by 2-fold when the soil reinforcement interface friction angle varies from 0 to 30°.That is to say,the bigger values the foundation soil and/or soil reinforcement interface friction angles have,the safer the reinforced soil walls become in the seismic design.The results were also compared with those obtained from pseudo-static method.It is found that there is a higher value of the safety factor by the present work.展开更多
文摘The evaluation of the seismic stability of an expanded municipal solid waste(MSW) landfill is very important in seismic prone zones.In this paper,the pseudo-dynamic method was used to calculate the average safety factor for the expanded landfill with a trapezoidal berm based on under-berm failure conditions.Furthermore,the effects of the variation of parameters such as the amplification factor,seismic coefficient,height of berm,angle of back slope of berm,and depth of waste mass at the back slope on the seismic stability of the landfill were studied.The results indicated that the influences of the vertical seismic coefficient,height of berm,and angle of the back slope of the berm on the seismic stability of the landfill are weakened as the amplification factor increases,but the influence of the horizontal seismic coefficient on the seismic stability of the landfill is strengthened.On the other hand,a certain ratio of the height of the waste mass above the back slope to the depth of waste mass at the back slope,or the reasonable consideration of the magnitude of the amplification factor will be conducive to the seismic design of the landfill.In addition,the results obtained by the pseudo-static and pseudo-dynamic methods were compared.
文摘In order to evaluate the seismic stability of reinforced soil walls against bearing capacity failure,the seismic safety factor of reinforced soil walls was determined by using pseudo-dynamic method,and calculated by considering different parameters,such as horizontal and vertical seismic acceleration coefficients,ratio of reinforcement length to wall height,back fill friction angle,foundation soil friction angle,soil reinforcement interface friction angle and surcharge.The parametric study shows that the seismic safety factor increases by 24-fold when the foundation soil friction angle varies from 25°to 45°,and increases by 2-fold when the soil reinforcement interface friction angle varies from 0 to 30°.That is to say,the bigger values the foundation soil and/or soil reinforcement interface friction angles have,the safer the reinforced soil walls become in the seismic design.The results were also compared with those obtained from pseudo-static method.It is found that there is a higher value of the safety factor by the present work.
