文章叙述了DX桩技术理论研究、设备工法及工程实践的发展过程，从DX桩挤扩设备的发明，到研制出钻扩清一体化机，直至今天又创新出HDX旋挖挤扩钻机，使DX桩技术取得了长足的进步和发展。

This paper introduced the developing process of DX pile technology in theory research, equipment and engineering methods and practices. From the invention of the DX extruding-expanding rig, the drilling-extruding-cleaning rig, to the rotary extruding-expanding rig, DX pile technology achieved great progress and development.