Yao Yingkang, Jiang Nan, Lyu Guopeng, Sun Jinshan, Yang Feng
State Key Laboratory of Precision Blasting, Jianghan University, Wuhan 430056, China.
Hubei Key Laboratory of Blasting Engineering, Jianghan University, Wuhan 430056, China.
Sensors (Basel). 2024 Jan 31;24(3):929. doi: 10.3390/s24030929.
Unexpected ground impacts can seriously affect the stability and operational safety of buried pipelines. In this paper, a full-scale modeling test of the dynamic response of a buried concrete pipeline under falling rock impact based on dynamic sensor testing was conducted. A commercially available reinforced concrete pipeline, buried in a clayey soil site, was used, and a 50 kg concrete ball was used to investigate the impact above the pipeline. Considering the purpose of the test, the falling process of the concrete ball and the surface vibration velocity induced by the touchdown of the concrete ball were monitored using a high-speed camera and a vibration signal tester, respectively. The dynamic response signals of the pipe under surface impact were tested using strain gauges and earth pressure gauges combined with dynamic sensors such as dynamic signal tester, and the dynamic response law was analyzed. The experimental results will provide a basis for the design of the impact resistance of reinforced concrete pipes.
意外的地面冲击会严重影响埋地管道的稳定性和运行安全性。本文基于动态传感器测试，对埋地混凝土管道在落石冲击下的动态响应进行了足尺模型试验。试验采用了一根埋设在黏性土场地中的商用钢筋混凝土管道，并使用一个50kg的混凝土球来研究管道上方的冲击。考虑到试验目的，分别使用高速摄像机和振动信号测试仪监测混凝土球的下落过程以及混凝土球触地引起的地表振动速度。利用应变片、土压力计结合动态信号测试仪等动态传感器测试管道在地表冲击下的动态响应信号，并分析动态响应规律。试验结果将为钢筋混凝土管道抗冲击设计提供依据。
