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通过对广州—佛山高速公路扩建工程及北京—珠海高速公路软土地基处理工程的研究，分析了粉喷桩、土应力转化及相互作用，进而对桩的轴向应力、复合地基沉降、作用机理进行了研究，并提出了用粉喷桩复合地基加固软土地基的几点看法。
Through the study of the Guangzhou-Foshan Expressway expansion project and the Beijing-Zhuhai Expressway soft soil foundation treatment project, the stress transformation and interaction of the powder-jetted pile and soil were analyzed, and then the axial stress of the pile, the settlement of the composite foundation, and the mechanism of action were analyzed. The research was carried out, and several points of view were put forward for the use of DJM pile composite foundation to reinforce the soft soil foundation.