通过对粉体喷射水泥搅拌桩在浙江省高速公路桥头软土地基处理中的应用与研究 ,由对比试验 ,获得了在刚性基础条件下 ,桩身应力的传递规律与变形特征 ,以及在路堤柔性荷载作用下桩与桩间土的变形不协调性 ,揭示了在柔性荷载作用下复合地基的形成机理和设置垫层的必要性 ,经多条高速公路的施工实践 ,提出了由轻便触探与钻孔取芯对其进行质量检测与评定的控制标准 Through the application and research of powder jet cement mixing piles in the treatment of bridgehead soft soil foundation in Zhejiang Expressway, the stress transfer and deformation characteristics of pile body under rigid foundation are obtained, The uncoordinated deformation of soil between piles and piles under the action of loads reveals the formation mechanism of composite foundation and the necessity of installing cushion under the action of flexible load. According to the construction practice of many freeways, Drill core coring quality control and evaluation of the control standards