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一、前言地震区路基设计问题主要是路基边坡抗震稳定分析的方法问题。目前一般采用的方法是将地震荷载看作一个静的地震惯性力,施加在具有园弧滑面的滑动土体重心。实际上,这种静力学方法首先假定了地震作用下边坡的损害仍然是那块用通常方法所确定的园柱面滑动土体的刚体转动。用这样的分析方法往往解释不了复杂的路基震害现象。大量的道路震害调查证实,在地基不发生液化、沉陷等破坏的情形下,填土路基,特别是
I. Preface The design of subgrade in seismic area is mainly the method of seismic stability analysis of subgrade slope. At present, the general method is to consider the seismic load as a static seismic inertial force, which is applied to the center of gravity of sliding soil with a circular arc sliding surface. In fact, this statics method first assumes that the damage of the slope under the earthquake action is still the rigid body rotation of the cylindrical sliding soil body determined by the usual method. With such analysis methods often can not explain the complex subgrade damage phenomenon. A large number of road damage investigation confirmed that in the foundation liquefaction, subsidence and other damage does not occur under the circumstances, filling roadbed, especially