Pipelines are buried everywhere for efficient water distribution. When the internal water pressure is applied, the thrust force acts on a pipe bend. The thrust force can cause displacement of pipe bends and detachment of joints, while the passive resistance from the surrounding soil acts against the thrust force. If the passive resistance is insufficient, measures must be taken. A vertical wall on the passive side of the pipe could be used as a thrust countermeasure. Although a previous experimental study reported its effectiveness, the experimental conditions were limited, and the effect of wall installation conditions on the passive resistance remains unclear. In this study, DEM analysis was conducted to investigate the influence of the wall’s location, particularly the distance α between the pipe and the wall, on the passive resistance. Although the resistance in DEM analysis was smaller than experimental results, the variation of resistance with distance α was qualitatively similar in DEM and experimental results. From the behavior of soil particles, increased resistance was attributed to the expansion of the soil movement area caused by the wall movement. Furthermore, it was found that the resistance increased when the wall was installed across the moving soil mass.