Study on the role of geogrid-reinforced for fly ash retaining wall basing on the analysis of FLAC3D

摘要

Geogrid-reinforced retaining wall is widely used in civil engineering, the role of geogrid reinforcement and the calculations of reinforcement material in the retaining wall design need further refinement. This paper analyzes the fly ash retaining wall with and without reinforcement by using finite element software of FLAC3D, studys the impact of geogrid-reinforced function on the stability of fly ash retaining wall, gets the design parameters of geogrid-reinforced fly ash retaining wall. The numerical results show that: the fly ash retaining walls' safety factor is lower when its height is greater than 6m, reinforcement is needed for fly ash retaining wall to improve its safety factor to ensure the stability of retaining wall. Simulate and analyze the 8m high geogrid reinforced fly ash retaining wall, the results show that: increasing the reinforcement spacing can increase the lateral and vertical displacement of geogrid reinforced fly ash retaining wall, the maximum vertical displacement of retaining wall is in the upper wall, maximum lateral displacement occurs in the lower parts of the retaining wall; the reasonable distance of 8m high fly ash retaining wall is 0.8m.