The freeway has high requirements to subgrade settlement after completion, and subgrade is the main issues of settlement of soft foundation treatment. So in the construction of expressway on soft ground, if we do not deal with the soft ground, it may lead to imbalance of the road base or excessive subgrade, and directly affect the health and life of the highway after completion.%由于高速公路对路基完工后沉降的要求很高,而沉降刚好是软土地基处理的主要问题,所以在软土地基上修筑高速公路,如果对软基不加以处理,往往会导致路基失稳或过量沉降,直接影响到竣工后公路的运行状况及其使用寿命.
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