摘要
以四川某高速公路岩溶隧道为工程背景,采用相似理论构建室内缩尺模型,研究了不同工况下落石对隧道护拱和衬砌结构的影响。通过高速摄影仪捕捉落石掉落瞬间的运动轨迹,同时利用应变片和动态信号测试分析系统监测了衬砌结构的应变响应,并利用加速度传感器研究了结构的加速度响应。研究发现,落石的反弹能量逐渐衰减导致其反弹高度减小;衬砌结构拱顶位置的加速度与位移响应明显,且随着落石质量和下落高度增加,衬砌结构的应变变化显著增加。
Taking the karst tunnel on a highway in Sichuan Province as the engineering target,an indoor scaled model is constructed by using similarity theory to study the effects of a rockfall action on tunnel arch protection and lining structures under different working conditions.The motion trajectory of a rockfall action is captured by a high-speed camera,with the strain response of the lining structure monitored by using strain gauges and a dynamic signal testing and analysis system,followed by a study on the acceleration response of the structure by using an accelerometer.Research has found that the rebound energy of a rockfall action gradually decreases,leading to a decrease in their rebound height;the acceleration and displacement response of the arch top position of the lining structure are significant,with the strain change of the lining structure increasing significantly with the increase of rockfall mass and height.
作者
祝方才
何文
杨志佳
刘冬
罗睿
ZHU Fangcai;HE Wen;YANG Zhijia;LIU Dong;LUO Rui(College of Civil Engineering,Hunan University of Technology,Zhuzhou Hunan 412007,China;2nd Engineering Co.,Ltd.,China Railway Beijing Group Engineering Co.,Ltd.,Changsha 410116,China;School of Resources,Safety and Environmental Engineering,Hunan University of Science and Technology,Xiangtan Hunan 411201,China)
出处
《湖南工业大学学报》
2025年第3期1-7,共7页
Journal of Hunan University of Technology
基金
湖南省自然科学株洲联合基金资助项目(2022JJ50087)。
关键词
岩溶隧道
支护结构
落石
动力响应
缩尺模型试验
karst tunnel
supporting structure
rockfall
dynamic response
scale model test
