中文摘要：

临界填筑高度是软基路堤工程中关注的一个问题，路堤填筑高度小于临界填筑高度时，地基的变形和稳定均能得到控制。以往的理论公式中对加筋垫层的影响考虑较少。本文根据加筋垫层的应力扩散理论及筋材摩阻力的减载作用，研究了加筋垫层作用下的临界高度确定方法，并对其中的参数选取作了初步探讨。

英文摘要：

Critical height is a key problem in embankment on soft ground engineering. When embankment height is less than the critical height, settlement and stability of foundations can be controlled. The effect of the reinforced cushion is considered little in the previous theoretical formula. This paper studies the critical height when the reinforced cushion play the role, based on the diffusion theory and the deloading of synthetic materials＇ friction drag. At last, the choice of the parameter is discussed.