The distribution pattern and calculation method of soil pressure have always been a difficult problem in the research of reinforced soil retaining walls. The magnitude and distribution of active earth pressure on reinforced soil retaining walls under different working conditions were investigated using finite element method. A method for calculating soil pressure in non limit states is proposed based on the dynamic performance of internal and external friction angles, and its rationality is verified by comparing it with traditional theoretical formula solutions, finite element numerical solutions, and measured results. The results show that the numerical value of soil pressure on the retaining wall is influenced by the stiffness and number of layers of the geogrid, showing a trend of gradually decreasing soil pressure as the number of reinforcement layers and stiffness increase. The magnitude of soil pressure on retaining walls is negatively correlated with depth. The trend of soil pressure on reinforced retaining walls varies little with depth under different working conditions, and the reinforcement effect is mainly reflected in the upper part of the retaining wall. The non limit state calculation results obtained by using the improved empirical formula are consistent with the measured results as a whole, proving the rationality of the improved formula.
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