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公路桥头跳车是国内外公路建设存在的通病,也长期困扰公路建设的一个难题,软弱地基路段的桥头跳车问题尤为突出。如果可以使传统的刚性桥台也具有与柔性的路基相同的“柔性”,就可以最大程度地消除两者的沉降差异,解决深厚软弱路基的桥头跳车问题。文章通过介绍振冲挤密碎石桩在福州国际机场高速公路薄壁桥台软弱地基上的应用,提出了一种解决深厚软弱地基桥头跳车问题的设计思路。
Highway bridgehead jumping is a common problem in highway construction at home and abroad, but also a long-standing problem plagued by highway construction. The bridgehead jumping problem on the soft foundation road section is particularly outstanding. If the traditional rigid abutment is also provided with the same “flexibility” as the flexible subgrade, the difference of settlement between the two can be maximally eliminated, and the bridgehead jumping problem of deep and weak subgrade can be solved. By introducing the application of Vibroflotation compaction pile to the weak foundation of the thin-walled abutment of Fuzhou International Airport Expressway, a design method to solve the problem of bridgehead jumping in deep and weak foundation is proposed.