针对常规粉喷桩存在搅拌不均匀、桩身不连续现象,导致过低的桩身强度。通过改进常规粉喷桩机的施工机械,增加内钻杆和动力设备和搅拌叶片,优化施工工艺,形成双向粉喷桩体,采用低应变动测法联合钻孔取芯进行标准贯入试验和室内无侧限抗压强度试验,论证了双向粉喷桩技术优越性。 Aiming at the uneven mixing of ordinary DJM pile, pile body discontinuity, resulting in low pile strength. By improving the construction machinery of conventional powder injection pile driver, increasing the inner drill rod and power equipment and mixing blades, optimizing the construction process to form a two-way powder spray pile body, using the low strain dynamic test combined with drilling coring for standard penetration test and Indoor unconfined compressive strength test demonstrates the superiority of two-way DJM technology.