当滑坡设计安全系数较小时，岩土体抗滑强度未得到充分发挥，有限元与极限分析法有一定差距；
When the pile design safety factor is small, the anti-slide strength of rock and soil is not fully exerted. The finite element method has some discrepancy with the traditional method.
现行规范中膨胀势判别方法的缺陷造成设计安全系数偏低，是路基严重变形、破坏的重要原因之一。
And this is one of the important causes of serious deformation and damage of roadbed. Engineering measures to deal with these roadbed defects are suggested in this paper.
依据经验，在一般桩设计安全系数下，两者计算得出推力一致，表明有限元用于计算桩后推力是可行的。
Based on the experience, the calculated thrusts by the two methods are the same under general design safety factor, indicating that the finite element method to calculate the pile thrust is feasible.
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