The design and construction of cement injection pile in treatment differential settlement between new and old subgrade in widening engineering of road are introduced.

• 介绍了在公路拓宽工程中新老路堤差异沉降中粉喷桩的设计及施工,总结了粉喷桩施工中疑难问题的处理措施,对类似公路拓宽工程具有借鉴意义。