冲击压实破碎旧水泥混凝土路面施工对盖板涵影响的研究

冲击压实施工时产生巨大的冲击波,会对改建线路桥涵产生严重影响。结合冲击压实技术在316国道福州段旧水泥混凝土路面改建工程中的应用,运用有限元采用拟静力法模拟冲击压实的动力作用,计算分析了由冲击压实载荷引起的附加应力在土基中的分布性状。并根据有限元计算结果,分析计算了冲击压实荷载作用下不同埋深盖板涵顶面的受力情况,进一步通过构造配筋比和冲击压实工作区两个概念,探讨了冲击压实施工时不同埋深盖板涵竖直和水平方向的安全控制距离。研究结论可为冲击压实安全施工控制提供参考。

Research on Influnence of Impact Compaction Technology In Rehabilitating Engineering on Orthogonal Slab Culvert

The shock waves caused impacting compaction with huge energy will damage the culverts along rehabilitating road.According to the application of impacting compaction technology in the rehabilitating engineering of 316 national road near by Fuzhou City,the distribution of impacting additional stress in the soil base caused compaction is analyzed by three dimensional FEM with pseudo-static instead of dynamics.On the basis of the analysis results of FEM,taking reinforced concrete orthogonal slab culvert for example,the mechanical characteristics of slab culvert under the compaction load is studied in this paper,safe distance to the slab culvert during impacting compaction working is suggested both in vertical and horizontal directions.The results of this paper are helpful to impacting compaction construction.