路基因条件复杂常经受各种自然因素的影响,承受车辆荷载的重复作用,并且加上设计、施工方面因素的影响,在使用过程中常产生各种病害。路基沉陷是路基在其施工期和道路建成后经常出现的一种病害。 Road conditions are often complicated by a variety of natural factors, to withstand the repeated role of vehicle load, and coupled with the design and construction aspects of the impact of factors in the use of the disease often occur. Subgrade subsidence is a kind of disease that subgrade often appears after its construction period and the completion of the road.