随着软土地区高速公路的快速发展,软土路基的沉降变形问题日益突出。文章主要是对粉喷桩半刚性桩处理高速公路软土路基的沉降变形及其处理方法作一定的探讨,认为沉降计算方法总体上是可行的。并阐述了路基固结沉降的计算公式以及软土路基的粉喷桩处理时的沉降计算方法,认为粉喷桩处理能够明显减小路基的沉降变形。 With the rapid development of expressway in soft soil area, the settlement and deformation of soft soil roadbed become increasingly prominent. The article mainly discusses the settlement and deformation of the soft soil subgrade treated by the powder-spray pile semi-rigid piles and its treatment methods. It is considered that the settlement calculation method is generally feasible. The calculation formula of the subgrade settlement and the settlement calculation method are also described. It is believed that the DJM pile treatment can obviously reduce the subsidence deformation of the subgrade.