Abstract
Expressway is developed quickly in China, but its construction is seriously affected by the un-uniform deformation of the subgrade. The basic concepts of post- treatment and pre- treatment on freeway subgrade are firstly discussed in this article, and then a conclusion that Post- treatment Method can obviously reduce the after-work sink is gained, which may be used as a practical reference for lighting the un-uniform deformation of thick-filled subgrade in soft-soil area.
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