The Influence Of Backfill Compactedion During Construction On The Stability Of Reinforced Soil Retaining Wall

Geosynthetic reinforcements have good tensile properties, suitable expansion ration and good durability,and may effectively improve the integrity and stability of soil. It is therefore widely used in reinforced soil retaining walls. In practice, however, there are many quality problems associated with reinforced soil retaining walls, which bring greater social and economic losses. Causes of these accidents vary, but from the current actual situation in China, the construction quality is a prominent problem.The effects of backfill compaction on the stability of reinforced soil retaining walls are mainly reflected in two aspects: the first is the impact of the soil relative density, which is caused by inadequate and non-uniform soil compaction, the second one is the impact of the actual change in tensile strength of reinforcement, which is caused by the reinforcement damage during soil compaction. The effects of soil compaction on the reliability of reinforced soil retaining wall are studied. Through the analysis of these two aspects. It is combined with engineering practice to make some reasonable proposals, in order to promote the quality control of reinforced soil retaining walls during construction.The research approach consists of the use of Monte Carlo method for the reliability analysis of reinforced soil retaining walls. Seven different sets of cases were analyzed.It is found that backfill compaction mainly affects the reliability of internal stability. When soil relative density is decreased, its tensile and pullout failure probabilities both increase significantly. It is also found that the greater the coefficient of variation, the greater the probability of failure. The failure probability caused by reinforcement damage is affected by distribution type of damage reduction ratio.