The bilinear geosynthetic-reinforced slope (BGRS) is a new two-tier reinforced earth structure without an offset. Analyzing its seismic internal stability is aimed to determine the resultant reinforcement force. In this paper, using a top-down log spiral mechanism, the moment limit equilibrium equations are established to formulate the resultant reinforcement forces for upper and lower tiers of the BGRS, considering influence of angle of lower tier, depth of tension crack, cohesion of backfill and pseudo-static seismic loads. Results show that ignoring cohesion of backfill and/or vertical upward seismic load is beneficial to conservative stability analysis, and the existence of tension cracks changes the distribution of reinforcement forces in upper and lower tiers. Additionally, the critical slip surface is also studied, which is found that the volume of the failure body decreases under the global stability with increase of angle of lower tier, cohesion of backfill or depth of tension crack, or with the decrease of seismic coefficients.

双线性土工合成材料加筋土坡（BGRS）是一种新型的两层无偏移的加筋土结构。分析其地震内部稳定性旨在确定合力。本文采用自上而下的对数螺旋机制，建立了弯矩极限平衡方程，考虑了下层角度，张力裂缝深度，内聚力的影响，计算了BGRS上下层的合力。回填和拟静力地震荷载。结果表明，忽略回填的内聚力和/或垂直向上的地震荷载有利于进行保守的稳定性分析，张拉裂缝的存在改变了上，下层钢筋的分布。此外，还研究了临界滑动面，