Combined with the sanitary landfill site engineering in Chengde City,the common problems existing in the structural design principle,main calculation formula,selection of design parameters and design calculation of the gravity waste dam are discussed.

Waste landfill in valley is a special engineering,which usually has a waste dam in the extrance of valley.

The essay uses the factor of nostickiness dam slope to calculate the minimum innerfriction angle and initiative pressure on waste dam, by which the stability state of dam resistsliding and dam resistoverturn and damslope stability can be calculated.

Consistent model to analyze the translational failure of sanitary landfills with refuse dam along the lateral phase and the base of landfill as well as the back or base of refuse dam is developed.

The height of refuse disposal plant and of refuse dam is estimated based on the stability theories of civil engineering;the seepage subject is of important in refuse sanitation disposal plant and it is resolved based on the seepage properties of geological material and on the technical of anti-seepage by geotechnical material.