浅埋金属圆管在爆破拆除塌落冲击振动下的动态响应  

Dynamic Response of Shallow Buried Metal Pipeline Caused by Collapse Shock Vibration in Blasting Demolition

作　　者：顾云 孙飞 陈作彬 刘迪 GU Yun;SUN Fei;CHEN Zuobin;LIU Di(Nuclear Industry Nanjing Construction Group Co.,Ltd.,Jiangsu Nanjing 211002)

机构地区：[1]核工业南京建设集团有限公司,江苏南京211002

出　　处：《爆破器材》2022年第6期52-59,64,共9页Explosive Materials

基　　金：江苏省地质矿产勘查局年度科研项目(2021KY10)。

摘　　要：为研究爆破拆除过程中浅埋地下金属圆管对塌落冲击的动态响应,采用模型试验和数值模拟相结合的手段,探究了塌落冲击载荷作用下塌落高度、重物质量以及管土刚度比对浅埋金属圆管动态应变的影响,得到了埋地圆管在不同参数影响的塌落冲击载荷作用下的动态响应规律;相似律指导下,采用数值计算方法验证了爆破拆除过程中塌落冲击浅埋金属圆管的缩比模型中土体和金属圆管的动力学响应符合相似关系。研究成果可以为复杂环境下高层建(构)筑爆破拆除工程的模型试验设计及减振防护设计提供理论参考。In order to study the dynamic response of shallow buried underground metal tubes under the impact of blasting demolition collapse,by means of model test and numerical simulation,the effects of collapse height,weight and stiffness ratio of pipe to soil on the dynamic strain of shallow buried metal pipe under collapse impact load were investigated.Dynamic response law of buried pipe under collapse impact load with different parameters such as weight was obtained.Numerical calculation method was used to verify that the dynamic response of soil and metal pipe in the scaled model of blasting demolition collapse impacting shallow buried metal pipe under the guidance of the similarity law conforms to the similarity relationship.The results can provide theoretical guidance for the model test design and shock absorption protection of blasting demolition engineering of high-rise buildings in complex environments.

关 键 词：塌落振动 管道响应 金属圆管 应变 数值模拟 爆破拆除 

分 类 号：TU746.5[建筑科学—建筑技术科学] O389[理学—流体力学]