Study On Stability Analysis Of High Reinforced Retainiling Wall

Based on the phase II construction project of Chongqing Guoyuan port, it waschoosen a typical section of the high reinforced earth retaining wall in the land foranalysis. It has been evaluated the high wall stability through computation for the highreinforcement earth retaining wall static structure by means of FLAC3Dfinite differencenumerical calculation software platform, and comparied with the limit equilibriummethod, strength reduction method. It was also analysied some factors related toinfluence of the stability. Main research contents and conclusions are as follows:(1) The calculation results of the static structure of high reinforced retaining wallshown that the wall face maximum horizontal deformation occurred near in the0.4wallhigh, and deformed as “drum belly” dumping. The maximum geogrid tensile of the wallwas located in the third-order wall corner. Each order maximum bar tensile ofreinforcement retaining wall was located in the bottom geogrid. Each geogrid maximumaxial tension position appears near in the wall face.(2) The settlement calculation of high reinforced earth retaining wall shown thattheir uneven settlement reach43.6%because of rigidity difference between panel andfill, and it was easily caused geogrid break-up and panel cross-fallen in the top of thewall. In order to reduce the harm to wall resulting from the additional force caused by it,it was suggested to make clear index of filling settlement and to use the new flexiblepanel when design for high reinforced earth retaining wall.(3) The results of finite difference strength reduction method are close to Janbu,and stability of retaining wall has significantly strengthened after reinforced. Thecalculations reveals that the geogrid in the first-order wall will be the first to yield in asmaller reduction factor; Its state zone distribution reveals that high reinforced earthretaining wall slide approximate be distribution of logarithmic spiral when it losesstability.(4) Sensitivity analysis for influence factors of high reinforced earth retaining wallstability reveals that soil friction angle, cohesion C, dilatancy angle, and cs_sfric cs_scohchave a greater impact on the stability safety factor. In the reinforcedearth structure,FS keeps steady increases whenE s<E b,andFS has declining trendwhenE s>E b; Sliding surface transformation from deep to shallow slide with theincrease of soil friction angle, dilatancy angle,and elastic modulusE s. And sliding surface transformation from shallow to deep slide with the increase of cohesionC, tensile strength t,and cs_sfric cs_scohc.