A NEW APPROACH FOR MODIFICATION OF DISPLACEMENT IN INCREMENTAL CONSTRUCTION ANALYSIS OF EARTH-ROCK DAM

The incremental construction analysis is widely applied in the Finite Element Analysis of stress and deformation in the construction of earth-rock darns.The simulated displacement field may not be suitable for the use in the practice due to the new filling soil.Thus,the computed displacement field in the new filling soil should be modified.Based on the fact that the total displacement consists of the convected displacement and the relative displacement,the theoretical settlement solutions in the 1-D condition are obtained in two different construction cases.One is in a single lift and the other is in multi lifts.These solutions show that the convected displacement has a great effect on the total displacement.A new approach for modification is proposed,and a comparison with existing approaches is made for a typical example.The results indicate that the new approach is more accurate and effective to eliminate unrealistic features in contours of displacement.