DX桩作为一种新型的变截面桩型具有施工简单、方便、快捷等优点。施工时，只须在钻（冲）成孔后，增加一道旋挖挤扩成盘的工序，就能形成由桩身、承力盘、桩端共同受力的形式。DX桩不但具有较高的承载力，还能很好地控制桩基的沉降变形。某高速公路桥梁桩基的静载荷试验表明，DX桩的承载力是同尺寸直孔桩的2倍多，而DX桩沉降则不到直孔桩的一半；同时，试验中DX桩锚桩的上拔量不足1 mm，在抗拔性能方面，DX桩也有很大的优越性。

DX pile which is a new-type of variable cross-section pile has the characteristics of easy, convenient and fast construction. When constructing the DX pile, only one extra procedure of extruding and expanding the bell cavities is added, after drilling (impacting) hole. So that the form of pile shaft, bells and pile tip bearing the load together can be achieved. DX pile has not only high bearing capacity, but also effectively controlled settlement of pile deformation. The static load test of a highway bridge foundation shows that the bearing capacity of DX pile is more than twice of the straight pile with the same parameters, while the settlement is only a half. Meanwhile, the ascending displacements of anchor piles are less than 1 mm, which means even in the uplift performance, DX pile also has a great advantage.