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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。
Shock compaction construction produces a huge shock wave, will have a serious impact on the reconstruction of the bridge and culvert. Combined with the application of impact compaction technology in the reconstruction of old cement concrete pavement in Fuzhou section of State Road 316, the dynamic effect of impact compaction was simulated by using quasi-static method with finite element method. The influence of additional stress Distribution in the base. According to the finite element calculation results, the stress conditions of the top of the culvert with different depths under the impact compaction load are analyzed and calculated. Two concepts of the reinforcement ratio and the impact compaction working area are further discussed, and the impact compaction Construction control at different depths of vertical and horizontal cover plate safety control distance. The conclusion can provide a reference for the control of impact compaction safety construction.