强夯置换是强夯用于加固饱和软粘土地基的方法。强夯置换法的加固机理与强夯法不同，它是利用重锤高落差产生的高冲击能将碎石、片石、矿渣等性能较好的材料强力挤入地基中，在地基中形成一个一个的粒料墩，墩与墩间土形成复合地基，以提高地基承载力，减小沉降。在强夯置换过程中，土体结构破坏，地基土体产生超孔隙水压力，但随着时间的增加，土体结构强度会得到恢复。粒料墩一般都有较好的透水性，利于土体中超孔隙水压力消散产生固结。
介绍了碎石桩、强夯置换两种工程常用的山区高填方地基的处理方式。
Two kinds of ground treatment methods, gravel piles and dynamic replacement methods, are introduced, which are the most popular treatments at high fill foundation of airport in mountainous area.
从施工结果看，采用强夯置换法处理车河站斜坡软土操作容易，效果明显。
According to the construction results, it is easy to treat the slope soft soil at the Chehe station with heavy-tamping replacement method and its effects are obvious.
对于块石回填区域，采用了强夯置换法加固。强夯置换法同时还具有动力固结效应。
For stone backfilling area, adopt dynamic replacement method, which simultaneously has dynamic consolidation effect.
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