挤扩灌注桩按挤扩设备的挤扩原理可分为两大类。属于第一类挤扩灌注桩的有挤扩多分支承力盘桩(简称挤扩支盘桩或支盘桩)、可变式扩底支盘桩、挤扩分支桩、力宝挤扩桩、单缸单向挤压三支桩和变径灌注桩;第二类挤扩灌注桩为DX挤扩灌注桩。第一类挤扩灌注桩的挤扩盘(支)空腔是采用单向液压缸单向往下挤压的挤扩装置完成的;DX挤扩灌注桩的 Pouring and expanding piles according to the expansion and contraction equipment squeeze expansion principle can be divided into two categories. The first type of crowded expansion grouting piles, such as squeezed expanded multi-branch supporting pile (referred to as squeezed branch or branch pile), variable expanded bottom branch pile, squeezed expansion branch pile, Lippo expanded pile, Single-cylinder unidirectional extrusion of three piles and variable-diameter cast-in-place piles; The first type of crowded expansion grouting pile squeeze expansion (branch) cavity is unidirectional one-way hydraulic cylinder extrusion squeeze expansion device to complete; DX crowded pile